diff options
51 files changed, 9661 insertions, 4 deletions
diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog index 488a153..3d6bde3 100644 --- a/libsanitizer/ChangeLog +++ b/libsanitizer/ChangeLog @@ -1,3 +1,11 @@ +2012-11-22 Wei Mi <wmi@google.com> + + * tsan: New directory. Import tsan runtime from llvm. + * configure.ac: Add 64 bits tsan build. + * Makefile.am: Likewise. + * configure: Regenerated. + * Makefile.in: Likewise. + 2012-11-21 Kostya Serebryany <kcc@google.com> * README.gcc: Extend the README.gcc with mode details. diff --git a/libsanitizer/Makefile.am b/libsanitizer/Makefile.am index 91e3434..d2192b2 100644 --- a/libsanitizer/Makefile.am +++ b/libsanitizer/Makefile.am @@ -1,6 +1,10 @@ ACLOCAL_AMFLAGS = -I .. -I ../config +if MULTISUBDIR32 SUBDIRS = interception sanitizer_common asan +else +SUBDIRS = interception sanitizer_common asan tsan +endif # Work around what appears to be a GNU make bug handling MAKEFLAGS # values defined in terms of make variables, as is the case for CC and diff --git a/libsanitizer/Makefile.in b/libsanitizer/Makefile.in index 8d685fd..09eb6e2 100644 --- a/libsanitizer/Makefile.in +++ b/libsanitizer/Makefile.in @@ -78,7 +78,7 @@ AM_RECURSIVE_TARGETS = $(RECURSIVE_TARGETS:-recursive=) \ distdir dist dist-all distcheck ETAGS = etags CTAGS = ctags -DIST_SUBDIRS = $(SUBDIRS) +DIST_SUBDIRS = interception sanitizer_common asan tsan DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST) distdir = $(PACKAGE)-$(VERSION) top_distdir = $(distdir) @@ -244,7 +244,8 @@ top_build_prefix = @top_build_prefix@ top_builddir = @top_builddir@ top_srcdir = @top_srcdir@ ACLOCAL_AMFLAGS = -I .. -I ../config -SUBDIRS = interception sanitizer_common asan +@MULTISUBDIR32_FALSE@SUBDIRS = interception sanitizer_common asan tsan +@MULTISUBDIR32_TRUE@SUBDIRS = interception sanitizer_common asan # Work around what appears to be a GNU make bug handling MAKEFLAGS # values defined in terms of make variables, as is the case for CC and diff --git a/libsanitizer/configure b/libsanitizer/configure index e3b3928..519b1db 100755 --- a/libsanitizer/configure +++ b/libsanitizer/configure @@ -604,6 +604,8 @@ ac_subst_vars='am__EXEEXT_FALSE am__EXEEXT_TRUE LTLIBOBJS LIBOBJS +MULTISUBDIR32_FALSE +MULTISUBDIR32_TRUE enable_static enable_shared CXXCPP @@ -10898,7 +10900,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 10901 "configure" +#line 10903 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -11004,7 +11006,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 11007 "configure" +#line 11009 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -14266,6 +14268,14 @@ if test "${multilib}" = "yes"; then else multilib_arg= fi + if test "x$with_multisubdir" = "x32"; then + MULTISUBDIR32_TRUE= + MULTISUBDIR32_FALSE='#' +else + MULTISUBDIR32_TRUE='#' + MULTISUBDIR32_FALSE= +fi + ac_config_files="$ac_config_files Makefile" @@ -14273,6 +14283,11 @@ ac_config_files="$ac_config_files Makefile" ac_config_files="$ac_config_files interception/Makefile sanitizer_common/Makefile asan/Makefile" +if test "x$with_multisubdir" != "x32"; then + ac_config_files="$ac_config_files tsan/Makefile" + +fi + cat >confcache <<\_ACEOF # This file is a shell script that caches the results of configure # tests run on this system so they can be shared between configure @@ -14434,6 +14449,10 @@ if test -z "${am__fastdepCCAS_TRUE}" && test -z "${am__fastdepCCAS_FALSE}"; then as_fn_error "conditional \"am__fastdepCCAS\" was never defined. Usually this means the macro was only invoked conditionally." "$LINENO" 5 fi +if test -z "${MULTISUBDIR32_TRUE}" && test -z "${MULTISUBDIR32_FALSE}"; then + as_fn_error "conditional \"MULTISUBDIR32\" was never defined. +Usually this means the macro was only invoked conditionally." "$LINENO" 5 +fi : ${CONFIG_STATUS=./config.status} ac_write_fail=0 @@ -15388,6 +15407,7 @@ do "interception/Makefile") CONFIG_FILES="$CONFIG_FILES interception/Makefile" ;; "sanitizer_common/Makefile") CONFIG_FILES="$CONFIG_FILES sanitizer_common/Makefile" ;; "asan/Makefile") CONFIG_FILES="$CONFIG_FILES asan/Makefile" ;; + "tsan/Makefile") CONFIG_FILES="$CONFIG_FILES tsan/Makefile" ;; *) as_fn_error "invalid argument: \`$ac_config_target'" "$LINENO" 5;; esac @@ -16752,6 +16772,17 @@ _EOF . ${multi_basedir}/config-ml.in { ml_norecursion=; unset ml_norecursion;} ;; + "tsan/Makefile":F) cat > vpsed$$ << \_EOF +s!`test -f '$<' || echo '$(srcdir)/'`!! +_EOF + sed -f vpsed$$ $ac_file > tmp$$ + mv tmp$$ $ac_file + rm vpsed$$ + echo 'MULTISUBDIR =' >> $ac_file + ml_norecursion=yes + . ${multi_basedir}/config-ml.in + { ml_norecursion=; unset ml_norecursion;} + ;; esac done # for ac_tag diff --git a/libsanitizer/configure.ac b/libsanitizer/configure.ac index 4fb576f..0f9e185 100644 --- a/libsanitizer/configure.ac +++ b/libsanitizer/configure.ac @@ -72,6 +72,7 @@ if test "${multilib}" = "yes"; then else multilib_arg= fi +AM_CONDITIONAL(MULTISUBDIR32, [test "x$with_multisubdir" = "x32"]) AC_CONFIG_FILES([Makefile]) @@ -88,4 +89,19 @@ _EOF AS_UNSET([ml_norecursion]) ]) +if test "x$with_multisubdir" != "x32"; then + AC_CONFIG_FILES(AC_FOREACH([DIR], [tsan], [DIR/Makefile ]), + [cat > vpsed$$ << \_EOF +s!`test -f '$<' || echo '$(srcdir)/'`!! +_EOF + sed -f vpsed$$ $ac_file > tmp$$ + mv tmp$$ $ac_file + rm vpsed$$ + echo 'MULTISUBDIR =' >> $ac_file + ml_norecursion=yes + . ${multi_basedir}/config-ml.in + AS_UNSET([ml_norecursion]) +]) +fi + AC_OUTPUT diff --git a/libsanitizer/tsan/Makefile.am b/libsanitizer/tsan/Makefile.am new file mode 100644 index 0000000..96b4fab --- /dev/null +++ b/libsanitizer/tsan/Makefile.am @@ -0,0 +1,80 @@ +AM_CPPFLAGS = -I $(top_srcdir) -I $(top_srcdir)/include + +DEFS = -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS +AM_CXXFLAGS = -Wall -W -Wno-unused-parameter -Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fvisibility=hidden -Wno-variadic-macros -Wno-c99-extensions +ACLOCAL_AMFLAGS = -I m4 + +toolexeclib_LTLIBRARIES = libtsan.la + +tsan_files = \ + tsan_clock.cc \ + tsan_interface_atomic.cc \ + tsan_mutex.cc \ + tsan_report.cc \ + tsan_rtl_thread.cc \ + tsan_symbolize.cc \ + tsan_flags.cc \ + tsan_interface.cc \ + tsan_platform_linux.cc \ + tsan_rtl.cc \ + tsan_stat.cc \ + tsan_sync.cc \ + tsan_interceptors.cc \ + tsan_md5.cc \ + tsan_platform_mac.cc \ + tsan_rtl_mutex.cc \ + tsan_suppressions.cc \ + tsan_interface_ann.cc \ + tsan_mman.cc \ + tsan_printf.cc \ + tsan_rtl_report.cc \ + tsan_symbolize_addr2line_linux.cc + +libtsan_la_SOURCES = $(tsan_files) +libtsan_la_LIBADD = $(top_builddir)/sanitizer_common/libsanitizer_common.la $(top_builddir)/interception/libinterception.la $(top_builddir)/../libstdc++-v3/src/libstdc++.la +libtsan_la_LDFLAGS = -version-info `grep -v '^\#' $(srcdir)/libtool-version` -lpthread -ldl + +# Work around what appears to be a GNU make bug handling MAKEFLAGS +# values defined in terms of make variables, as is the case for CC and +# friends when we are called from the top level Makefile. +AM_MAKEFLAGS = \ + "AR_FLAGS=$(AR_FLAGS)" \ + "CC_FOR_BUILD=$(CC_FOR_BUILD)" \ + "CFLAGS=$(CFLAGS)" \ + "CXXFLAGS=$(CXXFLAGS)" \ + "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \ + "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \ + "INSTALL=$(INSTALL)" \ + "INSTALL_DATA=$(INSTALL_DATA)" \ + "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \ + "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \ + "JC1FLAGS=$(JC1FLAGS)" \ + "LDFLAGS=$(LDFLAGS)" \ + "LIBCFLAGS=$(LIBCFLAGS)" \ + "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \ + "MAKE=$(MAKE)" \ + "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \ + "PICFLAG=$(PICFLAG)" \ + "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \ + "SHELL=$(SHELL)" \ + "RUNTESTFLAGS=$(RUNTESTFLAGS)" \ + "exec_prefix=$(exec_prefix)" \ + "infodir=$(infodir)" \ + "libdir=$(libdir)" \ + "prefix=$(prefix)" \ + "includedir=$(includedir)" \ + "AR=$(AR)" \ + "AS=$(AS)" \ + "CC=$(CC)" \ + "CXX=$(CXX)" \ + "LD=$(LD)" \ + "LIBCFLAGS=$(LIBCFLAGS)" \ + "NM=$(NM)" \ + "PICFLAG=$(PICFLAG)" \ + "RANLIB=$(RANLIB)" \ + "DESTDIR=$(DESTDIR)" + +MAKEOVERRIDES= + +## ################################################################ + diff --git a/libsanitizer/tsan/Makefile.in b/libsanitizer/tsan/Makefile.in new file mode 100644 index 0000000..71439d6 --- /dev/null +++ b/libsanitizer/tsan/Makefile.in @@ -0,0 +1,641 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +target_triplet = @target@ +subdir = tsan +DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in 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tsan_flags.lo tsan_interface.lo tsan_platform_linux.lo \ + tsan_rtl.lo tsan_stat.lo tsan_sync.lo tsan_interceptors.lo \ + tsan_md5.lo tsan_platform_mac.lo tsan_rtl_mutex.lo \ + tsan_suppressions.lo tsan_interface_ann.lo tsan_mman.lo \ + tsan_printf.lo tsan_rtl_report.lo \ + tsan_symbolize_addr2line_linux.lo +am_libtsan_la_OBJECTS = $(am__objects_1) +libtsan_la_OBJECTS = $(am_libtsan_la_OBJECTS) +libtsan_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \ + $(LIBTOOLFLAGS) --mode=link $(CXXLD) $(AM_CXXFLAGS) \ + $(CXXFLAGS) $(libtsan_la_LDFLAGS) $(LDFLAGS) -o $@ +DEFAULT_INCLUDES = -I.@am__isrc@ +depcomp = $(SHELL) $(top_srcdir)/../depcomp +am__depfiles_maybe = depfiles +am__mv = mv -f +CXXCOMPILE = $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \ + $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) +LTCXXCOMPILE = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ + --mode=compile $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \ + $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) 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tsan_rtl_thread.cc \ + tsan_symbolize.cc \ + tsan_flags.cc \ + tsan_interface.cc \ + tsan_platform_linux.cc \ + tsan_rtl.cc \ + tsan_stat.cc \ + tsan_sync.cc \ + tsan_interceptors.cc \ + tsan_md5.cc \ + tsan_platform_mac.cc \ + tsan_rtl_mutex.cc \ + tsan_suppressions.cc \ + tsan_interface_ann.cc \ + tsan_mman.cc \ + tsan_printf.cc \ + tsan_rtl_report.cc \ + tsan_symbolize_addr2line_linux.cc + +libtsan_la_SOURCES = $(tsan_files) +libtsan_la_LIBADD = $(top_builddir)/sanitizer_common/libsanitizer_common.la $(top_builddir)/interception/libinterception.la $(top_builddir)/../libstdc++-v3/src/libstdc++.la +libtsan_la_LDFLAGS = -version-info `grep -v '^\#' $(srcdir)/libtool-version` -lpthread -ldl + +# Work around what appears to be a GNU make bug handling MAKEFLAGS +# values defined in terms of make variables, as is the case for CC and +# friends when we are called from the top level Makefile. +AM_MAKEFLAGS = \ + "AR_FLAGS=$(AR_FLAGS)" \ + "CC_FOR_BUILD=$(CC_FOR_BUILD)" \ + "CFLAGS=$(CFLAGS)" 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least) may be exceeded. +.NOEXPORT: diff --git a/libsanitizer/tsan/libtool-version b/libsanitizer/tsan/libtool-version new file mode 100644 index 0000000..204fdd2 --- /dev/null +++ b/libsanitizer/tsan/libtool-version @@ -0,0 +1,6 @@ +# This file is used to maintain libtool version info for libmudflap. See +# the libtool manual to understand the meaning of the fields. This is +# a separate file so that version updates don't involve re-running +# automake. +# CURRENT:REVISION:AGE +0:0:0 diff --git a/libsanitizer/tsan/tsan_clock.cc b/libsanitizer/tsan/tsan_clock.cc new file mode 100644 index 0000000..937f861 --- /dev/null +++ b/libsanitizer/tsan/tsan_clock.cc @@ -0,0 +1,116 @@ +//===-- tsan_clock.cc -----------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "tsan_clock.h" +#include "tsan_rtl.h" + +// It's possible to optimize clock operations for some important cases +// so that they are O(1). The cases include singletons, once's, local mutexes. +// First, SyncClock must be re-implemented to allow indexing by tid. +// It must not necessarily be a full vector clock, though. For example it may +// be a multi-level table. +// Then, each slot in SyncClock must contain a dirty bit (it's united with +// the clock value, so no space increase). The acquire algorithm looks +// as follows: +// void acquire(thr, tid, thr_clock, sync_clock) { +// if (!sync_clock[tid].dirty) +// return; // No new info to acquire. +// // This handles constant reads of singleton pointers and +// // stop-flags. +// acquire_impl(thr_clock, sync_clock); // As usual, O(N). +// sync_clock[tid].dirty = false; +// sync_clock.dirty_count--; +// } +// The release operation looks as follows: +// void release(thr, tid, thr_clock, sync_clock) { +// // thr->sync_cache is a simple fixed-size hash-based cache that holds +// // several previous sync_clock's. +// if (thr->sync_cache[sync_clock] >= thr->last_acquire_epoch) { +// // The thread did no acquire operations since last release on this clock. +// // So update only the thread's slot (other slots can't possibly change). +// sync_clock[tid].clock = thr->epoch; +// if (sync_clock.dirty_count == sync_clock.cnt +// || (sync_clock.dirty_count == sync_clock.cnt - 1 +// && sync_clock[tid].dirty == false)) +// // All dirty flags are set, bail out. +// return; +// set all dirty bits, but preserve the thread's bit. // O(N) +// update sync_clock.dirty_count; +// return; +// } +// release_impl(thr_clock, sync_clock); // As usual, O(N). +// set all dirty bits, but preserve the thread's bit. +// // The previous step is combined with release_impl(), so that +// // we scan the arrays only once. +// update sync_clock.dirty_count; +// } + +namespace __tsan { + +ThreadClock::ThreadClock() { + nclk_ = 0; + for (uptr i = 0; i < (uptr)kMaxTidInClock; i++) + clk_[i] = 0; +} + +void ThreadClock::acquire(const SyncClock *src) { + DCHECK(nclk_ <= kMaxTid); + DCHECK(src->clk_.Size() <= kMaxTid); + + const uptr nclk = src->clk_.Size(); + if (nclk == 0) + return; + nclk_ = max(nclk_, nclk); + for (uptr i = 0; i < nclk; i++) { + if (clk_[i] < src->clk_[i]) + clk_[i] = src->clk_[i]; + } +} + +void ThreadClock::release(SyncClock *dst) const { + DCHECK(nclk_ <= kMaxTid); + DCHECK(dst->clk_.Size() <= kMaxTid); + + if (dst->clk_.Size() < nclk_) + dst->clk_.Resize(nclk_); + for (uptr i = 0; i < nclk_; i++) { + if (dst->clk_[i] < clk_[i]) + dst->clk_[i] = clk_[i]; + } +} + +void ThreadClock::ReleaseStore(SyncClock *dst) const { + DCHECK(nclk_ <= kMaxTid); + DCHECK(dst->clk_.Size() <= kMaxTid); + + if (dst->clk_.Size() < nclk_) + dst->clk_.Resize(nclk_); + for (uptr i = 0; i < nclk_; i++) + dst->clk_[i] = clk_[i]; + for (uptr i = nclk_; i < dst->clk_.Size(); i++) + dst->clk_[i] = 0; +} + +void ThreadClock::acq_rel(SyncClock *dst) { + acquire(dst); + release(dst); +} + +void ThreadClock::Disable(unsigned tid) { + u64 c0 = clk_[tid]; + for (uptr i = 0; i < kMaxTidInClock; i++) + clk_[i] = (u64)-1; + clk_[tid] = c0; +} + +SyncClock::SyncClock() + : clk_(MBlockClock) { +} +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_clock.h b/libsanitizer/tsan/tsan_clock.h new file mode 100644 index 0000000..d5c1730 --- /dev/null +++ b/libsanitizer/tsan/tsan_clock.h @@ -0,0 +1,80 @@ +//===-- tsan_clock.h --------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_CLOCK_H +#define TSAN_CLOCK_H + +#include "tsan_defs.h" +#include "tsan_vector.h" + +namespace __tsan { + +// The clock that lives in sync variables (mutexes, atomics, etc). +class SyncClock { + public: + SyncClock(); + + uptr size() const { + return clk_.Size(); + } + + void Reset() { + clk_.Reset(); + } + + private: + Vector<u64> clk_; + friend struct ThreadClock; +}; + +// The clock that lives in threads. +struct ThreadClock { + public: + ThreadClock(); + + u64 get(unsigned tid) const { + DCHECK_LT(tid, kMaxTidInClock); + return clk_[tid]; + } + + void set(unsigned tid, u64 v) { + DCHECK_LT(tid, kMaxTid); + DCHECK_GE(v, clk_[tid]); + clk_[tid] = v; + if (nclk_ <= tid) + nclk_ = tid + 1; + } + + void tick(unsigned tid) { + DCHECK_LT(tid, kMaxTid); + clk_[tid]++; + if (nclk_ <= tid) + nclk_ = tid + 1; + } + + void Disable(unsigned tid); + + uptr size() const { + return nclk_; + } + + void acquire(const SyncClock *src); + void release(SyncClock *dst) const; + void acq_rel(SyncClock *dst); + void ReleaseStore(SyncClock *dst) const; + + private: + uptr nclk_; + u64 clk_[kMaxTidInClock]; +}; + +} // namespace __tsan + +#endif // TSAN_CLOCK_H diff --git a/libsanitizer/tsan/tsan_defs.h b/libsanitizer/tsan/tsan_defs.h new file mode 100644 index 0000000..6a6f6b9 --- /dev/null +++ b/libsanitizer/tsan/tsan_defs.h @@ -0,0 +1,139 @@ +//===-- tsan_defs.h ---------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#ifndef TSAN_DEFS_H +#define TSAN_DEFS_H + +#include "sanitizer_common/sanitizer_internal_defs.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "tsan_stat.h" + +#ifndef TSAN_DEBUG +#define TSAN_DEBUG 0 +#endif // TSAN_DEBUG + +namespace __tsan { + +const int kTidBits = 13; +const unsigned kMaxTid = 1 << kTidBits; +const unsigned kMaxTidInClock = kMaxTid * 2; // This includes msb 'freed' bit. +const int kClkBits = 43; +#ifndef TSAN_GO +const int kShadowStackSize = 4 * 1024; +const int kTraceStackSize = 256; +#endif + +#ifdef TSAN_SHADOW_COUNT +# if TSAN_SHADOW_COUNT == 2 \ + || TSAN_SHADOW_COUNT == 4 || TSAN_SHADOW_COUNT == 8 +const unsigned kShadowCnt = TSAN_SHADOW_COUNT; +# else +# error "TSAN_SHADOW_COUNT must be one of 2,4,8" +# endif +#else +// Count of shadow values in a shadow cell. +const unsigned kShadowCnt = 8; +#endif + +// That many user bytes are mapped onto a single shadow cell. +const unsigned kShadowCell = 8; + +// Size of a single shadow value (u64). +const unsigned kShadowSize = 8; + +#if defined(TSAN_COLLECT_STATS) && TSAN_COLLECT_STATS +const bool kCollectStats = true; +#else +const bool kCollectStats = false; +#endif + +// The following "build consistency" machinery ensures that all source files +// are built in the same configuration. Inconsistent builds lead to +// hard to debug crashes. +#if TSAN_DEBUG +void build_consistency_debug(); +#else +void build_consistency_release(); +#endif + +#if TSAN_COLLECT_STATS +void build_consistency_stats(); +#else +void build_consistency_nostats(); +#endif + +#if TSAN_SHADOW_COUNT == 1 +void build_consistency_shadow1(); +#elif TSAN_SHADOW_COUNT == 2 +void build_consistency_shadow2(); +#elif TSAN_SHADOW_COUNT == 4 +void build_consistency_shadow4(); +#else +void build_consistency_shadow8(); +#endif + +static inline void USED build_consistency() { +#if TSAN_DEBUG + build_consistency_debug(); +#else + build_consistency_release(); +#endif +#if TSAN_COLLECT_STATS + build_consistency_stats(); +#else + build_consistency_nostats(); +#endif +#if TSAN_SHADOW_COUNT == 1 + build_consistency_shadow1(); +#elif TSAN_SHADOW_COUNT == 2 + build_consistency_shadow2(); +#elif TSAN_SHADOW_COUNT == 4 + build_consistency_shadow4(); +#else + build_consistency_shadow8(); +#endif +} + +template<typename T> +T min(T a, T b) { + return a < b ? a : b; +} + +template<typename T> +T max(T a, T b) { + return a > b ? a : b; +} + +template<typename T> +T RoundUp(T p, int align) { + DCHECK_EQ(align & (align - 1), 0); + return (T)(((u64)p + align - 1) & ~(align - 1)); +} + +struct MD5Hash { + u64 hash[2]; + bool operator==(const MD5Hash &other) const; +}; + +MD5Hash md5_hash(const void *data, uptr size); + +struct ThreadState; +struct ThreadContext; +struct Context; +struct ReportStack; +class ReportDesc; +class RegionAlloc; +class StackTrace; +struct MBlock; + +} // namespace __tsan + +#endif // TSAN_DEFS_H diff --git a/libsanitizer/tsan/tsan_flags.cc b/libsanitizer/tsan/tsan_flags.cc new file mode 100644 index 0000000..e8563f5 --- /dev/null +++ b/libsanitizer/tsan/tsan_flags.cc @@ -0,0 +1,80 @@ +//===-- tsan_flags.cc -----------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_flags.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "tsan_flags.h" +#include "tsan_rtl.h" +#include "tsan_mman.h" + +namespace __tsan { + +Flags *flags() { + return &CTX()->flags; +} + +// Can be overriden in frontend. +#ifdef TSAN_EXTERNAL_HOOKS +void OverrideFlags(Flags *f); +#else +SANITIZER_INTERFACE_ATTRIBUTE +void WEAK OverrideFlags(Flags *f) { + (void)f; +} +#endif + +void InitializeFlags(Flags *f, const char *env) { + internal_memset(f, 0, sizeof(*f)); + + // Default values. + f->enable_annotations = true; + f->suppress_equal_stacks = true; + f->suppress_equal_addresses = true; + f->report_thread_leaks = true; + f->report_destroy_locked = true; + f->report_signal_unsafe = true; + f->force_seq_cst_atomics = false; + f->strip_path_prefix = ""; + f->suppressions = ""; + f->exitcode = 66; + f->log_fileno = 2; + f->atexit_sleep_ms = 1000; + f->verbosity = 0; + f->profile_memory = ""; + f->flush_memory_ms = 0; + f->stop_on_start = false; + f->running_on_valgrind = false; + f->external_symbolizer_path = ""; + + // Let a frontend override. + OverrideFlags(f); + + // Override from command line. + ParseFlag(env, &f->enable_annotations, "enable_annotations"); + ParseFlag(env, &f->suppress_equal_stacks, "suppress_equal_stacks"); + ParseFlag(env, &f->suppress_equal_addresses, "suppress_equal_addresses"); + ParseFlag(env, &f->report_thread_leaks, "report_thread_leaks"); + ParseFlag(env, &f->report_destroy_locked, "report_destroy_locked"); + ParseFlag(env, &f->report_signal_unsafe, "report_signal_unsafe"); + ParseFlag(env, &f->force_seq_cst_atomics, "force_seq_cst_atomics"); + ParseFlag(env, &f->strip_path_prefix, "strip_path_prefix"); + ParseFlag(env, &f->suppressions, "suppressions"); + ParseFlag(env, &f->exitcode, "exitcode"); + ParseFlag(env, &f->log_fileno, "log_fileno"); + ParseFlag(env, &f->atexit_sleep_ms, "atexit_sleep_ms"); + ParseFlag(env, &f->verbosity, "verbosity"); + ParseFlag(env, &f->profile_memory, "profile_memory"); + ParseFlag(env, &f->flush_memory_ms, "flush_memory_ms"); + ParseFlag(env, &f->stop_on_start, "stop_on_start"); + ParseFlag(env, &f->external_symbolizer_path, "external_symbolizer_path"); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_flags.h b/libsanitizer/tsan/tsan_flags.h new file mode 100644 index 0000000..a6310e3 --- /dev/null +++ b/libsanitizer/tsan/tsan_flags.h @@ -0,0 +1,71 @@ +//===-- tsan_flags.h --------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// NOTE: This file may be included into user code. +//===----------------------------------------------------------------------===// + +#ifndef TSAN_FLAGS_H +#define TSAN_FLAGS_H + +// ----------- ATTENTION ------------- +// ThreadSanitizer user may provide its implementation of weak +// symbol __tsan::OverrideFlags(__tsan::Flags). Therefore, this +// header may be included in the user code, and shouldn't include +// other headers from TSan or common sanitizer runtime. + +namespace __tsan { + +struct Flags { + // Enable dynamic annotations, otherwise they are no-ops. + bool enable_annotations; + // Supress a race report if we've already output another race report + // with the same stack. + bool suppress_equal_stacks; + // Supress a race report if we've already output another race report + // on the same address. + bool suppress_equal_addresses; + // Report thread leaks at exit? + bool report_thread_leaks; + // Report destruction of a locked mutex? + bool report_destroy_locked; + // Report violations of async signal-safety + // (e.g. malloc() call from a signal handler). + bool report_signal_unsafe; + // If set, all atomics are effectively sequentially consistent (seq_cst), + // regardless of what user actually specified. + bool force_seq_cst_atomics; + // Strip that prefix from file paths in reports. + const char *strip_path_prefix; + // Suppressions filename. + const char *suppressions; + // Override exit status if something was reported. + int exitcode; + // Log fileno (1 - stdout, 2 - stderr). + int log_fileno; + // Sleep in main thread before exiting for that many ms + // (useful to catch "at exit" races). + int atexit_sleep_ms; + // Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output). + int verbosity; + // If set, periodically write memory profile to that file. + const char *profile_memory; + // Flush shadow memory every X ms. + int flush_memory_ms; + // Stops on start until __tsan_resume() is called (for debugging). + bool stop_on_start; + // Controls whether RunningOnValgrind() returns true or false. + bool running_on_valgrind; + // Path to external symbolizer. + const char *external_symbolizer_path; +}; + +Flags *flags(); +void InitializeFlags(Flags *flags, const char *env); +} + +#endif // TSAN_FLAGS_H diff --git a/libsanitizer/tsan/tsan_interceptors.cc b/libsanitizer/tsan/tsan_interceptors.cc new file mode 100644 index 0000000..194e236 --- /dev/null +++ b/libsanitizer/tsan/tsan_interceptors.cc @@ -0,0 +1,1515 @@ +//===-- tsan_interceptors.cc ----------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_atomic.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "sanitizer_common/sanitizer_stacktrace.h" +#include "tsan_interceptors.h" +#include "tsan_interface.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" +#include "tsan_mman.h" + +using namespace __tsan; // NOLINT + +const int kSigCount = 128; + +struct my_siginfo_t { + int opaque[128]; +}; + +struct sigset_t { + u64 val[1024 / 8 / sizeof(u64)]; +}; + +struct ucontext_t { + uptr opaque[117]; +}; + +extern "C" int pthread_attr_init(void *attr); +extern "C" int pthread_attr_destroy(void *attr); +extern "C" int pthread_attr_getdetachstate(void *attr, int *v); +extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize); +extern "C" int pthread_attr_getstacksize(void *attr, uptr *stacksize); +extern "C" int pthread_key_create(unsigned *key, void (*destructor)(void* v)); +extern "C" int pthread_setspecific(unsigned key, const void *v); +extern "C" int pthread_mutexattr_gettype(void *a, int *type); +extern "C" int pthread_yield(); +extern "C" int pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset); +extern "C" int sigfillset(sigset_t *set); +extern "C" void *pthread_self(); +extern "C" void _exit(int status); +extern "C" int __cxa_atexit(void (*func)(void *arg), void *arg, void *dso); +extern "C" int *__errno_location(); +const int PTHREAD_MUTEX_RECURSIVE = 1; +const int PTHREAD_MUTEX_RECURSIVE_NP = 1; +const int kPthreadAttrSize = 56; +const int EINVAL = 22; +const int EBUSY = 16; +const int EPOLL_CTL_ADD = 1; +const int SIGILL = 4; +const int SIGABRT = 6; +const int SIGFPE = 8; +const int SIGSEGV = 11; +const int SIGPIPE = 13; +const int SIGBUS = 7; +void *const MAP_FAILED = (void*)-1; +const int PTHREAD_BARRIER_SERIAL_THREAD = -1; +const int MAP_FIXED = 0x10; +typedef long long_t; // NOLINT + +// From /usr/include/unistd.h +# define F_ULOCK 0 /* Unlock a previously locked region. */ +# define F_LOCK 1 /* Lock a region for exclusive use. */ +# define F_TLOCK 2 /* Test and lock a region for exclusive use. */ +# define F_TEST 3 /* Test a region for other processes locks. */ + +typedef void (*sighandler_t)(int sig); + +#define errno (*__errno_location()) + +union pthread_attr_t { + char size[kPthreadAttrSize]; + void *align; +}; + +struct sigaction_t { + union { + sighandler_t sa_handler; + void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx); + }; + sigset_t sa_mask; + int sa_flags; + void (*sa_restorer)(); +}; + +const sighandler_t SIG_DFL = (sighandler_t)0; +const sighandler_t SIG_IGN = (sighandler_t)1; +const sighandler_t SIG_ERR = (sighandler_t)-1; +const int SA_SIGINFO = 4; +const int SIG_SETMASK = 2; + +namespace std { +struct nothrow_t {}; +} // namespace std + +static sigaction_t sigactions[kSigCount]; + +namespace __tsan { +struct SignalDesc { + bool armed; + bool sigaction; + my_siginfo_t siginfo; + ucontext_t ctx; +}; + +struct SignalContext { + int int_signal_send; + int pending_signal_count; + SignalDesc pending_signals[kSigCount]; +}; +} + +static SignalContext *SigCtx(ThreadState *thr) { + SignalContext *ctx = (SignalContext*)thr->signal_ctx; + if (ctx == 0 && thr->is_alive) { + ScopedInRtl in_rtl; + ctx = (SignalContext*)internal_alloc( + MBlockSignal, sizeof(*ctx)); + MemoryResetRange(thr, 0, (uptr)ctx, sizeof(*ctx)); + internal_memset(ctx, 0, sizeof(*ctx)); + thr->signal_ctx = ctx; + } + return ctx; +} + +static unsigned g_thread_finalize_key; + +static void process_pending_signals(ThreadState *thr); + +ScopedInterceptor::ScopedInterceptor(ThreadState *thr, const char *fname, + uptr pc) + : thr_(thr) + , in_rtl_(thr->in_rtl) { + if (thr_->in_rtl == 0) { + Initialize(thr); + FuncEntry(thr, pc); + thr_->in_rtl++; + DPrintf("#%d: intercept %s()\n", thr_->tid, fname); + } else { + thr_->in_rtl++; + } +} + +ScopedInterceptor::~ScopedInterceptor() { + thr_->in_rtl--; + if (thr_->in_rtl == 0) { + FuncExit(thr_); + process_pending_signals(thr_); + } + CHECK_EQ(in_rtl_, thr_->in_rtl); +} + +TSAN_INTERCEPTOR(unsigned, sleep, unsigned sec) { + SCOPED_TSAN_INTERCEPTOR(sleep, sec); + unsigned res = sleep(sec); + AfterSleep(thr, pc); + return res; +} + +TSAN_INTERCEPTOR(int, usleep, long_t usec) { + SCOPED_TSAN_INTERCEPTOR(usleep, usec); + int res = usleep(usec); + AfterSleep(thr, pc); + return res; +} + +TSAN_INTERCEPTOR(int, nanosleep, void *req, void *rem) { + SCOPED_TSAN_INTERCEPTOR(nanosleep, req, rem); + int res = nanosleep(req, rem); + AfterSleep(thr, pc); + return res; +} + +class AtExitContext { + public: + AtExitContext() + : mtx_(MutexTypeAtExit, StatMtxAtExit) + , pos_() { + } + + typedef void(*atexit_t)(); + + int atexit(ThreadState *thr, uptr pc, atexit_t f) { + Lock l(&mtx_); + if (pos_ == kMaxAtExit) + return 1; + Release(thr, pc, (uptr)this); + stack_[pos_] = f; + pos_++; + return 0; + } + + void exit(ThreadState *thr, uptr pc) { + CHECK_EQ(thr->in_rtl, 0); + for (;;) { + atexit_t f = 0; + { + Lock l(&mtx_); + if (pos_) { + pos_--; + f = stack_[pos_]; + ScopedInRtl in_rtl; + Acquire(thr, pc, (uptr)this); + } + } + if (f == 0) + break; + DPrintf("#%d: executing atexit func %p\n", thr->tid, f); + CHECK_EQ(thr->in_rtl, 0); + f(); + } + } + + private: + static const int kMaxAtExit = 128; + Mutex mtx_; + atexit_t stack_[kMaxAtExit]; + int pos_; +}; + +static AtExitContext *atexit_ctx; + +static void finalize(void *arg) { + ThreadState * thr = cur_thread(); + uptr pc = 0; + atexit_ctx->exit(thr, pc); + { + ScopedInRtl in_rtl; + DestroyAndFree(atexit_ctx); + REAL(usleep)(flags()->atexit_sleep_ms * 1000); + } + int status = Finalize(cur_thread()); + if (status) + _exit(status); +} + +TSAN_INTERCEPTOR(int, atexit, void (*f)()) { + SCOPED_TSAN_INTERCEPTOR(atexit, f); + return atexit_ctx->atexit(thr, pc, f); + return 0; +} + +TSAN_INTERCEPTOR(void, longjmp, void *env, int val) { + SCOPED_TSAN_INTERCEPTOR(longjmp, env, val); + TsanPrintf("ThreadSanitizer: longjmp() is not supported\n"); + Die(); +} + +TSAN_INTERCEPTOR(void, siglongjmp, void *env, int val) { + SCOPED_TSAN_INTERCEPTOR(siglongjmp, env, val); + TsanPrintf("ThreadSanitizer: siglongjmp() is not supported\n"); + Die(); +} + +static uptr fd2addr(int fd) { + (void)fd; + static u64 addr; + return (uptr)&addr; +} + +static uptr epollfd2addr(int fd) { + (void)fd; + static u64 addr; + return (uptr)&addr; +} + +static uptr file2addr(char *path) { + (void)path; + static u64 addr; + return (uptr)&addr; +} + +static uptr dir2addr(char *path) { + (void)path; + static u64 addr; + return (uptr)&addr; +} + +TSAN_INTERCEPTOR(void*, malloc, uptr size) { + void *p = 0; + { + SCOPED_INTERCEPTOR_RAW(malloc, size); + p = user_alloc(thr, pc, size); + } + invoke_malloc_hook(p, size); + return p; +} + +TSAN_INTERCEPTOR(void*, calloc, uptr size, uptr n) { + void *p = 0; + { + SCOPED_INTERCEPTOR_RAW(calloc, size, n); + p = user_alloc(thr, pc, n * size); + if (p) internal_memset(p, 0, n * size); + } + invoke_malloc_hook(p, n * size); + return p; +} + +TSAN_INTERCEPTOR(void*, realloc, void *p, uptr size) { + if (p) + invoke_free_hook(p); + { + SCOPED_INTERCEPTOR_RAW(realloc, p, size); + p = user_realloc(thr, pc, p, size); + } + invoke_malloc_hook(p, size); + return p; +} + +TSAN_INTERCEPTOR(void, free, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_INTERCEPTOR_RAW(free, p); + user_free(thr, pc, p); +} + +TSAN_INTERCEPTOR(void, cfree, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_INTERCEPTOR_RAW(cfree, p); + user_free(thr, pc, p); +} + +#define OPERATOR_NEW_BODY(mangled_name) \ + void *p = 0; \ + { \ + SCOPED_INTERCEPTOR_RAW(mangled_name, size); \ + p = user_alloc(thr, pc, size); \ + } \ + invoke_malloc_hook(p, size); \ + return p; + +void *operator new(__sanitizer::uptr size) { + OPERATOR_NEW_BODY(_Znwm); +} +void *operator new[](__sanitizer::uptr size) { + OPERATOR_NEW_BODY(_Znam); +} +void *operator new(__sanitizer::uptr size, std::nothrow_t const&) { + OPERATOR_NEW_BODY(_ZnwmRKSt9nothrow_t); +} +void *operator new[](__sanitizer::uptr size, std::nothrow_t const&) { + OPERATOR_NEW_BODY(_ZnamRKSt9nothrow_t); +} + +#define OPERATOR_DELETE_BODY(mangled_name) \ + if (ptr == 0) return; \ + invoke_free_hook(ptr); \ + SCOPED_INTERCEPTOR_RAW(mangled_name, ptr); \ + user_free(thr, pc, ptr); + +void operator delete(void *ptr) { + OPERATOR_DELETE_BODY(_ZdlPv); +} +void operator delete[](void *ptr) { + OPERATOR_DELETE_BODY(_ZdlPvRKSt9nothrow_t); +} +void operator delete(void *ptr, std::nothrow_t const&) { + OPERATOR_DELETE_BODY(_ZdaPv); +} +void operator delete[](void *ptr, std::nothrow_t const&) { + OPERATOR_DELETE_BODY(_ZdaPvRKSt9nothrow_t); +} + +TSAN_INTERCEPTOR(uptr, strlen, const char *s) { + SCOPED_TSAN_INTERCEPTOR(strlen, s); + uptr len = internal_strlen(s); + MemoryAccessRange(thr, pc, (uptr)s, len + 1, false); + return len; +} + +TSAN_INTERCEPTOR(void*, memset, void *dst, int v, uptr size) { + SCOPED_TSAN_INTERCEPTOR(memset, dst, v, size); + MemoryAccessRange(thr, pc, (uptr)dst, size, true); + return internal_memset(dst, v, size); +} + +TSAN_INTERCEPTOR(void*, memcpy, void *dst, const void *src, uptr size) { + SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size); + MemoryAccessRange(thr, pc, (uptr)dst, size, true); + MemoryAccessRange(thr, pc, (uptr)src, size, false); + return internal_memcpy(dst, src, size); +} + +TSAN_INTERCEPTOR(int, memcmp, const void *s1, const void *s2, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memcmp, s1, s2, n); + int res = 0; + uptr len = 0; + for (; len < n; len++) { + if ((res = ((unsigned char*)s1)[len] - ((unsigned char*)s2)[len])) + break; + } + MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); + MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); + return res; +} + +TSAN_INTERCEPTOR(int, strcmp, const char *s1, const char *s2) { + SCOPED_TSAN_INTERCEPTOR(strcmp, s1, s2); + uptr len = 0; + for (; s1[len] && s2[len]; len++) { + if (s1[len] != s2[len]) + break; + } + MemoryAccessRange(thr, pc, (uptr)s1, len + 1, false); + MemoryAccessRange(thr, pc, (uptr)s2, len + 1, false); + return s1[len] - s2[len]; +} + +TSAN_INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr n) { + SCOPED_TSAN_INTERCEPTOR(strncmp, s1, s2, n); + uptr len = 0; + for (; len < n && s1[len] && s2[len]; len++) { + if (s1[len] != s2[len]) + break; + } + MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); + MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); + return len == n ? 0 : s1[len] - s2[len]; +} + +TSAN_INTERCEPTOR(void*, memchr, void *s, int c, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memchr, s, c, n); + void *res = REAL(memchr)(s, c, n); + uptr len = res ? (char*)res - (char*)s + 1 : n; + MemoryAccessRange(thr, pc, (uptr)s, len, false); + return res; +} + +TSAN_INTERCEPTOR(void*, memrchr, char *s, int c, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memrchr, s, c, n); + MemoryAccessRange(thr, pc, (uptr)s, n, false); + return REAL(memrchr)(s, c, n); +} + +TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n); + MemoryAccessRange(thr, pc, (uptr)dst, n, true); + MemoryAccessRange(thr, pc, (uptr)src, n, false); + return REAL(memmove)(dst, src, n); +} + +TSAN_INTERCEPTOR(char*, strchr, char *s, int c) { + SCOPED_TSAN_INTERCEPTOR(strchr, s, c); + char *res = REAL(strchr)(s, c); + uptr len = res ? (char*)res - (char*)s + 1 : internal_strlen(s) + 1; + MemoryAccessRange(thr, pc, (uptr)s, len, false); + return res; +} + +TSAN_INTERCEPTOR(char*, strchrnul, char *s, int c) { + SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c); + char *res = REAL(strchrnul)(s, c); + uptr len = (char*)res - (char*)s + 1; + MemoryAccessRange(thr, pc, (uptr)s, len, false); + return res; +} + +TSAN_INTERCEPTOR(char*, strrchr, char *s, int c) { + SCOPED_TSAN_INTERCEPTOR(strrchr, s, c); + MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s) + 1, false); + return REAL(strrchr)(s, c); +} + +TSAN_INTERCEPTOR(char*, strcpy, char *dst, const char *src) { // NOLINT + SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src); // NOLINT + uptr srclen = internal_strlen(src); + MemoryAccessRange(thr, pc, (uptr)dst, srclen + 1, true); + MemoryAccessRange(thr, pc, (uptr)src, srclen + 1, false); + return REAL(strcpy)(dst, src); // NOLINT +} + +TSAN_INTERCEPTOR(char*, strncpy, char *dst, char *src, uptr n) { + SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n); + uptr srclen = internal_strnlen(src, n); + MemoryAccessRange(thr, pc, (uptr)dst, n, true); + MemoryAccessRange(thr, pc, (uptr)src, min(srclen + 1, n), false); + return REAL(strncpy)(dst, src, n); +} + +TSAN_INTERCEPTOR(const char*, strstr, const char *s1, const char *s2) { + SCOPED_TSAN_INTERCEPTOR(strstr, s1, s2); + const char *res = REAL(strstr)(s1, s2); + uptr len1 = internal_strlen(s1); + uptr len2 = internal_strlen(s2); + MemoryAccessRange(thr, pc, (uptr)s1, len1 + 1, false); + MemoryAccessRange(thr, pc, (uptr)s2, len2 + 1, false); + return res; +} + +static bool fix_mmap_addr(void **addr, long_t sz, int flags) { + if (*addr) { + if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) { + if (flags & MAP_FIXED) { + errno = EINVAL; + return false; + } else { + *addr = 0; + } + } + } + return true; +} + +TSAN_INTERCEPTOR(void*, mmap, void *addr, long_t sz, int prot, + int flags, int fd, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(mmap, addr, sz, prot, flags, fd, off); + if (!fix_mmap_addr(&addr, sz, flags)) + return MAP_FAILED; + void *res = REAL(mmap)(addr, sz, prot, flags, fd, off); + if (res != MAP_FAILED) { + MemoryResetRange(thr, pc, (uptr)res, sz); + } + return res; +} + +TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot, + int flags, int fd, u64 off) { + SCOPED_TSAN_INTERCEPTOR(mmap64, addr, sz, prot, flags, fd, off); + if (!fix_mmap_addr(&addr, sz, flags)) + return MAP_FAILED; + void *res = REAL(mmap64)(addr, sz, prot, flags, fd, off); + if (res != MAP_FAILED) { + MemoryResetRange(thr, pc, (uptr)res, sz); + } + return res; +} + +TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) { + SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz); + int res = REAL(munmap)(addr, sz); + return res; +} + +TSAN_INTERCEPTOR(void*, memalign, uptr align, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(memalign, align, sz); + return user_alloc(thr, pc, sz, align); +} + +TSAN_INTERCEPTOR(void*, valloc, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(valloc, sz); + return user_alloc(thr, pc, sz, kPageSize); +} + +TSAN_INTERCEPTOR(void*, pvalloc, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(pvalloc, sz); + sz = RoundUp(sz, kPageSize); + return user_alloc(thr, pc, sz, kPageSize); +} + +TSAN_INTERCEPTOR(int, posix_memalign, void **memptr, uptr align, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(posix_memalign, memptr, align, sz); + *memptr = user_alloc(thr, pc, sz, align); + return 0; +} + +// Used in thread-safe function static initialization. +TSAN_INTERCEPTOR(int, __cxa_guard_acquire, char *m) { + SCOPED_TSAN_INTERCEPTOR(__cxa_guard_acquire, m); + int res = REAL(__cxa_guard_acquire)(m); + if (res) { + // This thread does the init. + } else { + Acquire(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(void, __cxa_guard_release, char *m) { + SCOPED_TSAN_INTERCEPTOR(__cxa_guard_release, m); + Release(thr, pc, (uptr)m); + REAL(__cxa_guard_release)(m); +} + +static void thread_finalize(void *v) { + uptr iter = (uptr)v; + if (iter > 1) { + if (pthread_setspecific(g_thread_finalize_key, (void*)(iter - 1))) { + TsanPrintf("ThreadSanitizer: failed to set thread key\n"); + Die(); + } + return; + } + { + ScopedInRtl in_rtl; + ThreadState *thr = cur_thread(); + ThreadFinish(thr); + SignalContext *sctx = thr->signal_ctx; + if (sctx) { + thr->signal_ctx = 0; + internal_free(sctx); + } + } +} + + +struct ThreadParam { + void* (*callback)(void *arg); + void *param; + atomic_uintptr_t tid; +}; + +extern "C" void *__tsan_thread_start_func(void *arg) { + ThreadParam *p = (ThreadParam*)arg; + void* (*callback)(void *arg) = p->callback; + void *param = p->param; + int tid = 0; + { + ThreadState *thr = cur_thread(); + ScopedInRtl in_rtl; + if (pthread_setspecific(g_thread_finalize_key, (void*)4)) { + TsanPrintf("ThreadSanitizer: failed to set thread key\n"); + Die(); + } + while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0) + pthread_yield(); + atomic_store(&p->tid, 0, memory_order_release); + ThreadStart(thr, tid, GetTid()); + CHECK_EQ(thr->in_rtl, 1); + } + void *res = callback(param); + // Prevent the callback from being tail called, + // it mixes up stack traces. + volatile int foo = 42; + foo++; + return res; +} + +TSAN_INTERCEPTOR(int, pthread_create, + void *th, void *attr, void *(*callback)(void*), void * param) { + SCOPED_TSAN_INTERCEPTOR(pthread_create, th, attr, callback, param); + pthread_attr_t myattr; + if (attr == 0) { + pthread_attr_init(&myattr); + attr = &myattr; + } + int detached = 0; + pthread_attr_getdetachstate(attr, &detached); + uptr stacksize = 0; + pthread_attr_getstacksize(attr, &stacksize); + // We place the huge ThreadState object into TLS, account for that. + const uptr minstacksize = GetTlsSize() + 128*1024; + if (stacksize < minstacksize) { + DPrintf("ThreadSanitizer: stacksize %zu->%zu\n", stacksize, minstacksize); + pthread_attr_setstacksize(attr, minstacksize); + } + ThreadParam p; + p.callback = callback; + p.param = param; + atomic_store(&p.tid, 0, memory_order_relaxed); + int res = REAL(pthread_create)(th, attr, __tsan_thread_start_func, &p); + if (res == 0) { + int tid = ThreadCreate(thr, pc, *(uptr*)th, detached); + CHECK_NE(tid, 0); + atomic_store(&p.tid, tid, memory_order_release); + while (atomic_load(&p.tid, memory_order_acquire) != 0) + pthread_yield(); + } + if (attr == &myattr) + pthread_attr_destroy(&myattr); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_join, void *th, void **ret) { + SCOPED_TSAN_INTERCEPTOR(pthread_join, th, ret); + int tid = ThreadTid(thr, pc, (uptr)th); + int res = REAL(pthread_join)(th, ret); + if (res == 0) { + ThreadJoin(thr, pc, tid); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_detach, void *th) { + SCOPED_TSAN_INTERCEPTOR(pthread_detach, th); + int tid = ThreadTid(thr, pc, (uptr)th); + int res = REAL(pthread_detach)(th); + if (res == 0) { + ThreadDetach(thr, pc, tid); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init, m, a); + int res = REAL(pthread_mutex_init)(m, a); + if (res == 0) { + bool recursive = false; + if (a) { + int type = 0; + if (pthread_mutexattr_gettype(a, &type) == 0) + recursive = (type == PTHREAD_MUTEX_RECURSIVE + || type == PTHREAD_MUTEX_RECURSIVE_NP); + } + MutexCreate(thr, pc, (uptr)m, false, recursive, false); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m); + int res = REAL(pthread_mutex_destroy)(m); + if (res == 0 || res == EBUSY) { + MutexDestroy(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_lock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_lock, m); + int res = REAL(pthread_mutex_lock)(m); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m); + int res = REAL(pthread_mutex_trylock)(m); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_timedlock, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock, m, abstime); + int res = REAL(pthread_mutex_timedlock)(m, abstime); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_unlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_unlock, m); + MutexUnlock(thr, pc, (uptr)m); + int res = REAL(pthread_mutex_unlock)(m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_init, void *m, int pshared) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_init, m, pshared); + int res = REAL(pthread_spin_init)(m, pshared); + if (res == 0) { + MutexCreate(thr, pc, (uptr)m, false, false, false); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_destroy, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy, m); + int res = REAL(pthread_spin_destroy)(m); + if (res == 0) { + MutexDestroy(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_lock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock, m); + int res = REAL(pthread_spin_lock)(m); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_trylock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock, m); + int res = REAL(pthread_spin_trylock)(m); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_unlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock, m); + MutexUnlock(thr, pc, (uptr)m); + int res = REAL(pthread_spin_unlock)(m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_init, void *m, void *a) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init, m, a); + int res = REAL(pthread_rwlock_init)(m, a); + if (res == 0) { + MutexCreate(thr, pc, (uptr)m, true, false, false); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_destroy, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy, m); + int res = REAL(pthread_rwlock_destroy)(m); + if (res == 0) { + MutexDestroy(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock, m); + int res = REAL(pthread_rwlock_rdlock)(m); + if (res == 0) { + MutexReadLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock, m); + int res = REAL(pthread_rwlock_tryrdlock)(m); + if (res == 0) { + MutexReadLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock, m, abstime); + int res = REAL(pthread_rwlock_timedrdlock)(m, abstime); + if (res == 0) { + MutexReadLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock, m); + int res = REAL(pthread_rwlock_wrlock)(m); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock, m); + int res = REAL(pthread_rwlock_trywrlock)(m); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock, m, abstime); + int res = REAL(pthread_rwlock_timedwrlock)(m, abstime); + if (res == 0) { + MutexLock(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_unlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock, m); + MutexReadOrWriteUnlock(thr, pc, (uptr)m); + int res = REAL(pthread_rwlock_unlock)(m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_init, void *c, void *a) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_init, c, a); + int res = REAL(pthread_cond_init)(c, a); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_destroy, void *c) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, c); + int res = REAL(pthread_cond_destroy)(c); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_signal, void *c) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal, c); + int res = REAL(pthread_cond_signal)(c); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_broadcast, void *c) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast, c); + int res = REAL(pthread_cond_broadcast)(c); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_wait, void *c, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_wait, c, m); + MutexUnlock(thr, pc, (uptr)m); + int res = REAL(pthread_cond_wait)(c, m); + MutexLock(thr, pc, (uptr)m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_timedwait, void *c, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait, c, m, abstime); + MutexUnlock(thr, pc, (uptr)m); + int res = REAL(pthread_cond_timedwait)(c, m, abstime); + MutexLock(thr, pc, (uptr)m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_barrier_init, void *b, void *a, unsigned count) { + SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init, b, a, count); + MemoryWrite1Byte(thr, pc, (uptr)b); + int res = REAL(pthread_barrier_init)(b, a, count); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_barrier_destroy, void *b) { + SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy, b); + MemoryWrite1Byte(thr, pc, (uptr)b); + int res = REAL(pthread_barrier_destroy)(b); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) { + SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait, b); + Release(thr, pc, (uptr)b); + MemoryRead1Byte(thr, pc, (uptr)b); + int res = REAL(pthread_barrier_wait)(b); + MemoryRead1Byte(thr, pc, (uptr)b); + if (res == 0 || res == PTHREAD_BARRIER_SERIAL_THREAD) { + Acquire(thr, pc, (uptr)b); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) { + SCOPED_TSAN_INTERCEPTOR(pthread_once, o, f); + if (o == 0 || f == 0) + return EINVAL; + atomic_uint32_t *a = static_cast<atomic_uint32_t*>(o); + u32 v = atomic_load(a, memory_order_acquire); + if (v == 0 && atomic_compare_exchange_strong(a, &v, 1, + memory_order_relaxed)) { + const int old_in_rtl = thr->in_rtl; + thr->in_rtl = 0; + (*f)(); + CHECK_EQ(thr->in_rtl, 0); + thr->in_rtl = old_in_rtl; + Release(thr, pc, (uptr)o); + atomic_store(a, 2, memory_order_release); + } else { + while (v != 2) { + pthread_yield(); + v = atomic_load(a, memory_order_acquire); + } + Acquire(thr, pc, (uptr)o); + } + return 0; +} + +TSAN_INTERCEPTOR(int, sem_init, void *s, int pshared, unsigned value) { + SCOPED_TSAN_INTERCEPTOR(sem_init, s, pshared, value); + int res = REAL(sem_init)(s, pshared, value); + return res; +} + +TSAN_INTERCEPTOR(int, sem_destroy, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_destroy, s); + int res = REAL(sem_destroy)(s); + return res; +} + +TSAN_INTERCEPTOR(int, sem_wait, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_wait, s); + int res = REAL(sem_wait)(s); + if (res == 0) { + Acquire(thr, pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(int, sem_trywait, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_trywait, s); + int res = REAL(sem_trywait)(s); + if (res == 0) { + Acquire(thr, pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(int, sem_timedwait, void *s, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(sem_timedwait, s, abstime); + int res = REAL(sem_timedwait)(s, abstime); + if (res == 0) { + Acquire(thr, pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(int, sem_post, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_post, s); + Release(thr, pc, (uptr)s); + int res = REAL(sem_post)(s); + return res; +} + +TSAN_INTERCEPTOR(int, sem_getvalue, void *s, int *sval) { + SCOPED_TSAN_INTERCEPTOR(sem_getvalue, s, sval); + int res = REAL(sem_getvalue)(s, sval); + if (res == 0) { + Acquire(thr, pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, read, int fd, void *buf, long_t sz) { + SCOPED_TSAN_INTERCEPTOR(read, fd, buf, sz); + int res = REAL(read)(fd, buf, sz); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, pread, int fd, void *buf, long_t sz, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(pread, fd, buf, sz, off); + int res = REAL(pread)(fd, buf, sz, off); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, pread64, int fd, void *buf, long_t sz, u64 off) { + SCOPED_TSAN_INTERCEPTOR(pread64, fd, buf, sz, off); + int res = REAL(pread64)(fd, buf, sz, off); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, readv, int fd, void *vec, int cnt) { + SCOPED_TSAN_INTERCEPTOR(readv, fd, vec, cnt); + int res = REAL(readv)(fd, vec, cnt); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, preadv64, int fd, void *vec, int cnt, u64 off) { + SCOPED_TSAN_INTERCEPTOR(preadv64, fd, vec, cnt, off); + int res = REAL(preadv64)(fd, vec, cnt, off); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, write, int fd, void *buf, long_t sz) { + SCOPED_TSAN_INTERCEPTOR(write, fd, buf, sz); + Release(thr, pc, fd2addr(fd)); + int res = REAL(write)(fd, buf, sz); + return res; +} + +TSAN_INTERCEPTOR(long_t, pwrite, int fd, void *buf, long_t sz, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(pwrite, fd, buf, sz, off); + Release(thr, pc, fd2addr(fd)); + int res = REAL(pwrite)(fd, buf, sz, off); + return res; +} + +TSAN_INTERCEPTOR(long_t, pwrite64, int fd, void *buf, long_t sz, u64 off) { + SCOPED_TSAN_INTERCEPTOR(pwrite64, fd, buf, sz, off); + Release(thr, pc, fd2addr(fd)); + int res = REAL(pwrite64)(fd, buf, sz, off); + return res; +} + +TSAN_INTERCEPTOR(long_t, writev, int fd, void *vec, int cnt) { + SCOPED_TSAN_INTERCEPTOR(writev, fd, vec, cnt); + Release(thr, pc, fd2addr(fd)); + int res = REAL(writev)(fd, vec, cnt); + return res; +} + +TSAN_INTERCEPTOR(long_t, pwritev64, int fd, void *vec, int cnt, u64 off) { + SCOPED_TSAN_INTERCEPTOR(pwritev64, fd, vec, cnt, off); + Release(thr, pc, fd2addr(fd)); + int res = REAL(pwritev64)(fd, vec, cnt, off); + return res; +} + +TSAN_INTERCEPTOR(long_t, send, int fd, void *buf, long_t len, int flags) { + SCOPED_TSAN_INTERCEPTOR(send, fd, buf, len, flags); + Release(thr, pc, fd2addr(fd)); + int res = REAL(send)(fd, buf, len, flags); + return res; +} + +TSAN_INTERCEPTOR(long_t, sendmsg, int fd, void *msg, int flags) { + SCOPED_TSAN_INTERCEPTOR(sendmsg, fd, msg, flags); + Release(thr, pc, fd2addr(fd)); + int res = REAL(sendmsg)(fd, msg, flags); + return res; +} + +TSAN_INTERCEPTOR(long_t, recv, int fd, void *buf, long_t len, int flags) { + SCOPED_TSAN_INTERCEPTOR(recv, fd, buf, len, flags); + int res = REAL(recv)(fd, buf, len, flags); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, recvmsg, int fd, void *msg, int flags) { + SCOPED_TSAN_INTERCEPTOR(recvmsg, fd, msg, flags); + int res = REAL(recvmsg)(fd, msg, flags); + if (res >= 0) { + Acquire(thr, pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(int, unlink, char *path) { + SCOPED_TSAN_INTERCEPTOR(unlink, path); + Release(thr, pc, file2addr(path)); + int res = REAL(unlink)(path); + return res; +} + +TSAN_INTERCEPTOR(void*, fopen, char *path, char *mode) { + SCOPED_TSAN_INTERCEPTOR(fopen, path, mode); + void *res = REAL(fopen)(path, mode); + Acquire(thr, pc, file2addr(path)); + return res; +} + +TSAN_INTERCEPTOR(uptr, fread, void *ptr, uptr size, uptr nmemb, void *f) { + SCOPED_TSAN_INTERCEPTOR(fread, ptr, size, nmemb, f); + MemoryAccessRange(thr, pc, (uptr)ptr, size * nmemb, true); + return REAL(fread)(ptr, size, nmemb, f); +} + +TSAN_INTERCEPTOR(uptr, fwrite, const void *p, uptr size, uptr nmemb, void *f) { + SCOPED_TSAN_INTERCEPTOR(fwrite, p, size, nmemb, f); + MemoryAccessRange(thr, pc, (uptr)p, size * nmemb, false); + return REAL(fwrite)(p, size, nmemb, f); +} + +TSAN_INTERCEPTOR(int, puts, const char *s) { + SCOPED_TSAN_INTERCEPTOR(puts, s); + MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s), false); + return REAL(puts)(s); +} + +TSAN_INTERCEPTOR(int, rmdir, char *path) { + SCOPED_TSAN_INTERCEPTOR(rmdir, path); + Release(thr, pc, dir2addr(path)); + int res = REAL(rmdir)(path); + return res; +} + +TSAN_INTERCEPTOR(void*, opendir, char *path) { + SCOPED_TSAN_INTERCEPTOR(opendir, path); + void *res = REAL(opendir)(path); + Acquire(thr, pc, dir2addr(path)); + return res; +} + +TSAN_INTERCEPTOR(int, epoll_ctl, int epfd, int op, int fd, void *ev) { + SCOPED_TSAN_INTERCEPTOR(epoll_ctl, epfd, op, fd, ev); + if (op == EPOLL_CTL_ADD) { + Release(thr, pc, epollfd2addr(epfd)); + } + int res = REAL(epoll_ctl)(epfd, op, fd, ev); + return res; +} + +TSAN_INTERCEPTOR(int, epoll_wait, int epfd, void *ev, int cnt, int timeout) { + SCOPED_TSAN_INTERCEPTOR(epoll_wait, epfd, ev, cnt, timeout); + int res = REAL(epoll_wait)(epfd, ev, cnt, timeout); + if (res > 0) { + Acquire(thr, pc, epollfd2addr(epfd)); + } + return res; +} + +static void ALWAYS_INLINE rtl_generic_sighandler(bool sigact, int sig, + my_siginfo_t *info, void *ctx) { + ThreadState *thr = cur_thread(); + SignalContext *sctx = SigCtx(thr); + // Don't mess with synchronous signals. + if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || + sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || + (sctx && sig == sctx->int_signal_send)) { + CHECK(thr->in_rtl == 0 || thr->in_rtl == 1); + int in_rtl = thr->in_rtl; + thr->in_rtl = 0; + CHECK_EQ(thr->in_signal_handler, false); + thr->in_signal_handler = true; + if (sigact) + sigactions[sig].sa_sigaction(sig, info, ctx); + else + sigactions[sig].sa_handler(sig); + CHECK_EQ(thr->in_signal_handler, true); + thr->in_signal_handler = false; + thr->in_rtl = in_rtl; + return; + } + + if (sctx == 0) + return; + SignalDesc *signal = &sctx->pending_signals[sig]; + if (signal->armed == false) { + signal->armed = true; + signal->sigaction = sigact; + if (info) + internal_memcpy(&signal->siginfo, info, sizeof(*info)); + if (ctx) + internal_memcpy(&signal->ctx, ctx, sizeof(signal->ctx)); + sctx->pending_signal_count++; + } +} + +static void rtl_sighandler(int sig) { + rtl_generic_sighandler(false, sig, 0, 0); +} + +static void rtl_sigaction(int sig, my_siginfo_t *info, void *ctx) { + rtl_generic_sighandler(true, sig, info, ctx); +} + +TSAN_INTERCEPTOR(int, sigaction, int sig, sigaction_t *act, sigaction_t *old) { + SCOPED_TSAN_INTERCEPTOR(sigaction, sig, act, old); + if (old) + internal_memcpy(old, &sigactions[sig], sizeof(*old)); + if (act == 0) + return 0; + internal_memcpy(&sigactions[sig], act, sizeof(*act)); + sigaction_t newact; + internal_memcpy(&newact, act, sizeof(newact)); + sigfillset(&newact.sa_mask); + if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL) { + if (newact.sa_flags & SA_SIGINFO) + newact.sa_sigaction = rtl_sigaction; + else + newact.sa_handler = rtl_sighandler; + } + int res = REAL(sigaction)(sig, &newact, 0); + return res; +} + +TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) { + sigaction_t act; + act.sa_handler = h; + REAL(memset)(&act.sa_mask, -1, sizeof(act.sa_mask)); + act.sa_flags = 0; + sigaction_t old; + int res = sigaction(sig, &act, &old); + if (res) + return SIG_ERR; + return old.sa_handler; +} + +TSAN_INTERCEPTOR(int, raise, int sig) { + SCOPED_TSAN_INTERCEPTOR(raise, sig); + SignalContext *sctx = SigCtx(thr); + CHECK_NE(sctx, 0); + int prev = sctx->int_signal_send; + sctx->int_signal_send = sig; + int res = REAL(raise)(sig); + CHECK_EQ(sctx->int_signal_send, sig); + sctx->int_signal_send = prev; + return res; +} + +TSAN_INTERCEPTOR(int, kill, int pid, int sig) { + SCOPED_TSAN_INTERCEPTOR(kill, pid, sig); + SignalContext *sctx = SigCtx(thr); + CHECK_NE(sctx, 0); + int prev = sctx->int_signal_send; + if (pid == GetPid()) { + sctx->int_signal_send = sig; + } + int res = REAL(kill)(pid, sig); + if (pid == GetPid()) { + CHECK_EQ(sctx->int_signal_send, sig); + sctx->int_signal_send = prev; + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_kill, void *tid, int sig) { + SCOPED_TSAN_INTERCEPTOR(pthread_kill, tid, sig); + SignalContext *sctx = SigCtx(thr); + CHECK_NE(sctx, 0); + int prev = sctx->int_signal_send; + if (tid == pthread_self()) { + sctx->int_signal_send = sig; + } + int res = REAL(pthread_kill)(tid, sig); + if (tid == pthread_self()) { + CHECK_EQ(sctx->int_signal_send, sig); + sctx->int_signal_send = prev; + } + return res; +} + +static void process_pending_signals(ThreadState *thr) { + CHECK_EQ(thr->in_rtl, 0); + SignalContext *sctx = SigCtx(thr); + if (sctx == 0 || sctx->pending_signal_count == 0 || thr->in_signal_handler) + return; + Context *ctx = CTX(); + thr->in_signal_handler = true; + sctx->pending_signal_count = 0; + // These are too big for stack. + static THREADLOCAL sigset_t emptyset, oldset; + sigfillset(&emptyset); + pthread_sigmask(SIG_SETMASK, &emptyset, &oldset); + for (int sig = 0; sig < kSigCount; sig++) { + SignalDesc *signal = &sctx->pending_signals[sig]; + if (signal->armed) { + signal->armed = false; + if (sigactions[sig].sa_handler != SIG_DFL + && sigactions[sig].sa_handler != SIG_IGN) { + // Insure that the handler does not spoil errno. + const int saved_errno = errno; + errno = 0; + if (signal->sigaction) + sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx); + else + sigactions[sig].sa_handler(sig); + if (errno != 0) { + ScopedInRtl in_rtl; + __tsan::StackTrace stack; + uptr pc = signal->sigaction ? + (uptr)sigactions[sig].sa_sigaction : + (uptr)sigactions[sig].sa_handler; + stack.Init(&pc, 1); + ScopedReport rep(ReportTypeErrnoInSignal); + if (!IsFiredSuppression(ctx, rep, stack)) { + rep.AddStack(&stack); + OutputReport(ctx, rep, rep.GetReport()->stacks[0]); + } + } + errno = saved_errno; + } + } + } + pthread_sigmask(SIG_SETMASK, &oldset, 0); + CHECK_EQ(thr->in_signal_handler, true); + thr->in_signal_handler = false; +} + +namespace __tsan { + +void InitializeInterceptors() { + CHECK_GT(cur_thread()->in_rtl, 0); + + // We need to setup it early, because functions like dlsym() can call it. + REAL(memset) = internal_memset; + REAL(memcpy) = internal_memcpy; + REAL(memcmp) = internal_memcmp; + + TSAN_INTERCEPT(longjmp); + TSAN_INTERCEPT(siglongjmp); + + TSAN_INTERCEPT(malloc); + TSAN_INTERCEPT(calloc); + TSAN_INTERCEPT(realloc); + TSAN_INTERCEPT(free); + TSAN_INTERCEPT(cfree); + TSAN_INTERCEPT(mmap); + TSAN_INTERCEPT(mmap64); + TSAN_INTERCEPT(munmap); + TSAN_INTERCEPT(memalign); + TSAN_INTERCEPT(valloc); + TSAN_INTERCEPT(pvalloc); + TSAN_INTERCEPT(posix_memalign); + + TSAN_INTERCEPT(strlen); + TSAN_INTERCEPT(memset); + TSAN_INTERCEPT(memcpy); + TSAN_INTERCEPT(strcmp); + TSAN_INTERCEPT(memchr); + TSAN_INTERCEPT(memrchr); + TSAN_INTERCEPT(memmove); + TSAN_INTERCEPT(memcmp); + TSAN_INTERCEPT(strchr); + TSAN_INTERCEPT(strchrnul); + TSAN_INTERCEPT(strrchr); + TSAN_INTERCEPT(strncmp); + TSAN_INTERCEPT(strcpy); // NOLINT + TSAN_INTERCEPT(strncpy); + TSAN_INTERCEPT(strstr); + + TSAN_INTERCEPT(__cxa_guard_acquire); + TSAN_INTERCEPT(__cxa_guard_release); + + TSAN_INTERCEPT(pthread_create); + TSAN_INTERCEPT(pthread_join); + TSAN_INTERCEPT(pthread_detach); + + TSAN_INTERCEPT(pthread_mutex_init); + TSAN_INTERCEPT(pthread_mutex_destroy); + TSAN_INTERCEPT(pthread_mutex_lock); + TSAN_INTERCEPT(pthread_mutex_trylock); + TSAN_INTERCEPT(pthread_mutex_timedlock); + TSAN_INTERCEPT(pthread_mutex_unlock); + + TSAN_INTERCEPT(pthread_spin_init); + TSAN_INTERCEPT(pthread_spin_destroy); + TSAN_INTERCEPT(pthread_spin_lock); + TSAN_INTERCEPT(pthread_spin_trylock); + TSAN_INTERCEPT(pthread_spin_unlock); + + TSAN_INTERCEPT(pthread_rwlock_init); + TSAN_INTERCEPT(pthread_rwlock_destroy); + TSAN_INTERCEPT(pthread_rwlock_rdlock); + TSAN_INTERCEPT(pthread_rwlock_tryrdlock); + TSAN_INTERCEPT(pthread_rwlock_timedrdlock); + TSAN_INTERCEPT(pthread_rwlock_wrlock); + TSAN_INTERCEPT(pthread_rwlock_trywrlock); + TSAN_INTERCEPT(pthread_rwlock_timedwrlock); + TSAN_INTERCEPT(pthread_rwlock_unlock); + + TSAN_INTERCEPT(pthread_cond_init); + TSAN_INTERCEPT(pthread_cond_destroy); + TSAN_INTERCEPT(pthread_cond_signal); + TSAN_INTERCEPT(pthread_cond_broadcast); + TSAN_INTERCEPT(pthread_cond_wait); + TSAN_INTERCEPT(pthread_cond_timedwait); + + TSAN_INTERCEPT(pthread_barrier_init); + TSAN_INTERCEPT(pthread_barrier_destroy); + TSAN_INTERCEPT(pthread_barrier_wait); + + TSAN_INTERCEPT(pthread_once); + + TSAN_INTERCEPT(sem_init); + TSAN_INTERCEPT(sem_destroy); + TSAN_INTERCEPT(sem_wait); + TSAN_INTERCEPT(sem_trywait); + TSAN_INTERCEPT(sem_timedwait); + TSAN_INTERCEPT(sem_post); + TSAN_INTERCEPT(sem_getvalue); + + TSAN_INTERCEPT(read); + TSAN_INTERCEPT(pread); + TSAN_INTERCEPT(pread64); + TSAN_INTERCEPT(readv); + TSAN_INTERCEPT(preadv64); + TSAN_INTERCEPT(write); + TSAN_INTERCEPT(pwrite); + TSAN_INTERCEPT(pwrite64); + TSAN_INTERCEPT(writev); + TSAN_INTERCEPT(pwritev64); + TSAN_INTERCEPT(send); + TSAN_INTERCEPT(sendmsg); + TSAN_INTERCEPT(recv); + TSAN_INTERCEPT(recvmsg); + + TSAN_INTERCEPT(unlink); + TSAN_INTERCEPT(fopen); + TSAN_INTERCEPT(fread); + TSAN_INTERCEPT(fwrite); + TSAN_INTERCEPT(puts); + TSAN_INTERCEPT(rmdir); + TSAN_INTERCEPT(opendir); + + TSAN_INTERCEPT(epoll_ctl); + TSAN_INTERCEPT(epoll_wait); + + TSAN_INTERCEPT(sigaction); + TSAN_INTERCEPT(signal); + TSAN_INTERCEPT(raise); + TSAN_INTERCEPT(kill); + TSAN_INTERCEPT(pthread_kill); + TSAN_INTERCEPT(sleep); + TSAN_INTERCEPT(usleep); + TSAN_INTERCEPT(nanosleep); + + atexit_ctx = new(internal_alloc(MBlockAtExit, sizeof(AtExitContext))) + AtExitContext(); + + if (__cxa_atexit(&finalize, 0, 0)) { + TsanPrintf("ThreadSanitizer: failed to setup atexit callback\n"); + Die(); + } + + if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) { + TsanPrintf("ThreadSanitizer: failed to create thread key\n"); + Die(); + } +} + +void internal_start_thread(void(*func)(void *arg), void *arg) { + void *th; + REAL(pthread_create)(&th, 0, (void*(*)(void *arg))func, arg); + REAL(pthread_detach)(th); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_interceptors.h b/libsanitizer/tsan/tsan_interceptors.h new file mode 100644 index 0000000..2e8c553 --- /dev/null +++ b/libsanitizer/tsan/tsan_interceptors.h @@ -0,0 +1,52 @@ +//===-- tsan_interceptors.h -------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#ifndef TSAN_INTERCEPTORS_H +#define TSAN_INTERCEPTORS_H + +#include "interception/interception.h" +#include "sanitizer_common/sanitizer_stacktrace.h" +#include "tsan_rtl.h" + +namespace __tsan { + +class ScopedInterceptor { + public: + ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc); + ~ScopedInterceptor(); + private: + ThreadState *const thr_; + const int in_rtl_; +}; + +#define SCOPED_INTERCEPTOR_RAW(func, ...) \ + ThreadState *thr = cur_thread(); \ + StatInc(thr, StatInterceptor); \ + StatInc(thr, StatInt_##func); \ + const uptr caller_pc = GET_CALLER_PC(); \ + ScopedInterceptor si(thr, #func, caller_pc); \ + /* Subtract one from pc as we need current instruction address */ \ + const uptr pc = __sanitizer::StackTrace::GetCurrentPc() - 1; \ + (void)pc; \ +/**/ + +#define SCOPED_TSAN_INTERCEPTOR(func, ...) \ + SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \ + if (thr->in_rtl > 1) \ + return REAL(func)(__VA_ARGS__); \ +/**/ + +#define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__) +#define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func) + +} // namespace __tsan + +#endif // TSAN_INTERCEPTORS_H diff --git a/libsanitizer/tsan/tsan_interface.cc b/libsanitizer/tsan/tsan_interface.cc new file mode 100644 index 0000000..08a5165 --- /dev/null +++ b/libsanitizer/tsan/tsan_interface.cc @@ -0,0 +1,40 @@ +//===-- tsan_interface.cc -------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "tsan_interface.h" +#include "tsan_interface_ann.h" +#include "tsan_rtl.h" + +#define CALLERPC ((uptr)__builtin_return_address(0)) + +using namespace __tsan; // NOLINT + +void __tsan_init() { + Initialize(cur_thread()); +} + +void __tsan_read16(void *addr) { + MemoryRead8Byte(cur_thread(), CALLERPC, (uptr)addr); + MemoryRead8Byte(cur_thread(), CALLERPC, (uptr)addr + 8); +} + +void __tsan_write16(void *addr) { + MemoryWrite8Byte(cur_thread(), CALLERPC, (uptr)addr); + MemoryWrite8Byte(cur_thread(), CALLERPC, (uptr)addr + 8); +} + +void __tsan_acquire(void *addr) { + Acquire(cur_thread(), CALLERPC, (uptr)addr); +} + +void __tsan_release(void *addr) { + Release(cur_thread(), CALLERPC, (uptr)addr); +} diff --git a/libsanitizer/tsan/tsan_interface.h b/libsanitizer/tsan/tsan_interface.h new file mode 100644 index 0000000..72bb1e9 --- /dev/null +++ b/libsanitizer/tsan/tsan_interface.h @@ -0,0 +1,50 @@ +//===-- tsan_interface.h ----------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// The functions declared in this header will be inserted by the instrumentation +// module. +// This header can be included by the instrumented program or by TSan tests. +//===----------------------------------------------------------------------===// +#ifndef TSAN_INTERFACE_H +#define TSAN_INTERFACE_H + +#include <sanitizer/common_interface_defs.h> +// This header should NOT include any other headers. +// All functions in this header are extern "C" and start with __tsan_. + +#ifdef __cplusplus +extern "C" { +#endif + +// This function should be called at the very beginning of the process, +// before any instrumented code is executed and before any call to malloc. +void __tsan_init() SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +void __tsan_read1(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_read2(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_read4(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_read8(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_read16(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +void __tsan_write1(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_write2(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_write4(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_write8(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_write16(void *addr) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +void __tsan_vptr_update(void **vptr_p, void *new_val) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +void __tsan_func_entry(void *call_pc) SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_func_exit() SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // TSAN_INTERFACE_H diff --git a/libsanitizer/tsan/tsan_interface_ann.cc b/libsanitizer/tsan/tsan_interface_ann.cc new file mode 100644 index 0000000..fd5c1cc --- /dev/null +++ b/libsanitizer/tsan/tsan_interface_ann.cc @@ -0,0 +1,402 @@ +//===-- tsan_interface_ann.cc ---------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "tsan_interface_ann.h" +#include "tsan_mutex.h" +#include "tsan_report.h" +#include "tsan_rtl.h" +#include "tsan_mman.h" +#include "tsan_flags.h" +#include "tsan_platform.h" + +#define CALLERPC ((uptr)__builtin_return_address(0)) + +using namespace __tsan; // NOLINT + +namespace __tsan { + +class ScopedAnnotation { + public: + ScopedAnnotation(ThreadState *thr, const char *aname, const char *f, int l, + uptr pc) + : thr_(thr) + , in_rtl_(thr->in_rtl) { + CHECK_EQ(thr_->in_rtl, 0); + FuncEntry(thr_, pc); + thr_->in_rtl++; + DPrintf("#%d: annotation %s() %s:%d\n", thr_->tid, aname, f, l); + } + + ~ScopedAnnotation() { + thr_->in_rtl--; + CHECK_EQ(in_rtl_, thr_->in_rtl); + FuncExit(thr_); + } + private: + ThreadState *const thr_; + const int in_rtl_; +}; + +#define SCOPED_ANNOTATION(typ) \ + if (!flags()->enable_annotations) \ + return; \ + ThreadState *thr = cur_thread(); \ + const uptr pc = (uptr)__builtin_return_address(0); \ + StatInc(thr, StatAnnotation); \ + StatInc(thr, Stat##typ); \ + ScopedAnnotation sa(thr, __FUNCTION__, f, l, \ + (uptr)__builtin_return_address(0)); \ + (void)pc; \ +/**/ + +static const int kMaxDescLen = 128; + +struct ExpectRace { + ExpectRace *next; + ExpectRace *prev; + int hitcount; + uptr addr; + uptr size; + char *file; + int line; + char desc[kMaxDescLen]; +}; + +struct DynamicAnnContext { + Mutex mtx; + ExpectRace expect; + ExpectRace benign; + + DynamicAnnContext() + : mtx(MutexTypeAnnotations, StatMtxAnnotations) { + } +}; + +static DynamicAnnContext *dyn_ann_ctx; +static char dyn_ann_ctx_placeholder[sizeof(DynamicAnnContext)] ALIGNED(64); + +static void AddExpectRace(ExpectRace *list, + char *f, int l, uptr addr, uptr size, char *desc) { + ExpectRace *race = list->next; + for (; race != list; race = race->next) { + if (race->addr == addr && race->size == size) + return; + } + race = (ExpectRace*)internal_alloc(MBlockExpectRace, sizeof(ExpectRace)); + race->hitcount = 0; + race->addr = addr; + race->size = size; + race->file = f; + race->line = l; + race->desc[0] = 0; + if (desc) { + int i = 0; + for (; i < kMaxDescLen - 1 && desc[i]; i++) + race->desc[i] = desc[i]; + race->desc[i] = 0; + } + race->prev = list; + race->next = list->next; + race->next->prev = race; + list->next = race; +} + +static ExpectRace *FindRace(ExpectRace *list, uptr addr, uptr size) { + for (ExpectRace *race = list->next; race != list; race = race->next) { + uptr maxbegin = max(race->addr, addr); + uptr minend = min(race->addr + race->size, addr + size); + if (maxbegin < minend) + return race; + } + return 0; +} + +static bool CheckContains(ExpectRace *list, uptr addr, uptr size) { + ExpectRace *race = FindRace(list, addr, size); + if (race == 0 && AlternativeAddress(addr)) + race = FindRace(list, AlternativeAddress(addr), size); + if (race == 0) + return false; + DPrintf("Hit expected/benign race: %s addr=%zx:%d %s:%d\n", + race->desc, race->addr, (int)race->size, race->file, race->line); + race->hitcount++; + return true; +} + +static void InitList(ExpectRace *list) { + list->next = list; + list->prev = list; +} + +void InitializeDynamicAnnotations() { + dyn_ann_ctx = new(dyn_ann_ctx_placeholder) DynamicAnnContext; + InitList(&dyn_ann_ctx->expect); + InitList(&dyn_ann_ctx->benign); +} + +bool IsExpectedReport(uptr addr, uptr size) { + Lock lock(&dyn_ann_ctx->mtx); + if (CheckContains(&dyn_ann_ctx->expect, addr, size)) + return true; + if (CheckContains(&dyn_ann_ctx->benign, addr, size)) + return true; + return false; +} + +} // namespace __tsan + +using namespace __tsan; // NOLINT + +extern "C" { +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateHappensBefore(char *f, int l, uptr addr) { + SCOPED_ANNOTATION(AnnotateHappensBefore); + Release(cur_thread(), CALLERPC, addr); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateHappensAfter(char *f, int l, uptr addr) { + SCOPED_ANNOTATION(AnnotateHappensAfter); + Acquire(cur_thread(), CALLERPC, addr); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateCondVarSignal(char *f, int l, uptr cv) { + SCOPED_ANNOTATION(AnnotateCondVarSignal); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateCondVarSignalAll(char *f, int l, uptr cv) { + SCOPED_ANNOTATION(AnnotateCondVarSignalAll); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateMutexIsNotPHB(char *f, int l, uptr mu) { + SCOPED_ANNOTATION(AnnotateMutexIsNotPHB); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateCondVarWait(char *f, int l, uptr cv, uptr lock) { + SCOPED_ANNOTATION(AnnotateCondVarWait); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateRWLockCreate(char *f, int l, uptr m) { + SCOPED_ANNOTATION(AnnotateRWLockCreate); + MutexCreate(thr, pc, m, true, true, false); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateRWLockCreateStatic(char *f, int l, uptr m) { + SCOPED_ANNOTATION(AnnotateRWLockCreateStatic); + MutexCreate(thr, pc, m, true, true, true); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateRWLockDestroy(char *f, int l, uptr m) { + SCOPED_ANNOTATION(AnnotateRWLockDestroy); + MutexDestroy(thr, pc, m); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateRWLockAcquired(char *f, int l, uptr m, uptr is_w) { + SCOPED_ANNOTATION(AnnotateRWLockAcquired); + if (is_w) + MutexLock(thr, pc, m); + else + MutexReadLock(thr, pc, m); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateRWLockReleased(char *f, int l, uptr m, uptr is_w) { + SCOPED_ANNOTATION(AnnotateRWLockReleased); + if (is_w) + MutexUnlock(thr, pc, m); + else + MutexReadUnlock(thr, pc, m); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateTraceMemory(char *f, int l, uptr mem) { + SCOPED_ANNOTATION(AnnotateTraceMemory); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateFlushState(char *f, int l) { + SCOPED_ANNOTATION(AnnotateFlushState); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateNewMemory(char *f, int l, uptr mem, uptr size) { + SCOPED_ANNOTATION(AnnotateNewMemory); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateNoOp(char *f, int l, uptr mem) { + SCOPED_ANNOTATION(AnnotateNoOp); +} + +static void ReportMissedExpectedRace(ExpectRace *race) { + TsanPrintf("==================\n"); + TsanPrintf("WARNING: ThreadSanitizer: missed expected data race\n"); + TsanPrintf(" %s addr=%zx %s:%d\n", + race->desc, race->addr, race->file, race->line); + TsanPrintf("==================\n"); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateFlushExpectedRaces(char *f, int l) { + SCOPED_ANNOTATION(AnnotateFlushExpectedRaces); + Lock lock(&dyn_ann_ctx->mtx); + while (dyn_ann_ctx->expect.next != &dyn_ann_ctx->expect) { + ExpectRace *race = dyn_ann_ctx->expect.next; + if (race->hitcount == 0) { + CTX()->nmissed_expected++; + ReportMissedExpectedRace(race); + } + race->prev->next = race->next; + race->next->prev = race->prev; + internal_free(race); + } +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateEnableRaceDetection(char *f, int l, int enable) { + SCOPED_ANNOTATION(AnnotateEnableRaceDetection); + // FIXME: Reconsider this functionality later. It may be irrelevant. +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateMutexIsUsedAsCondVar(char *f, int l, uptr mu) { + SCOPED_ANNOTATION(AnnotateMutexIsUsedAsCondVar); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotatePCQGet(char *f, int l, uptr pcq) { + SCOPED_ANNOTATION(AnnotatePCQGet); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotatePCQPut(char *f, int l, uptr pcq) { + SCOPED_ANNOTATION(AnnotatePCQPut); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotatePCQDestroy(char *f, int l, uptr pcq) { + SCOPED_ANNOTATION(AnnotatePCQDestroy); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotatePCQCreate(char *f, int l, uptr pcq) { + SCOPED_ANNOTATION(AnnotatePCQCreate); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateExpectRace(char *f, int l, uptr mem, char *desc) { + SCOPED_ANNOTATION(AnnotateExpectRace); + Lock lock(&dyn_ann_ctx->mtx); + AddExpectRace(&dyn_ann_ctx->expect, + f, l, mem, 1, desc); + DPrintf("Add expected race: %s addr=%zx %s:%d\n", desc, mem, f, l); +} + +static void BenignRaceImpl(char *f, int l, uptr mem, uptr size, char *desc) { + Lock lock(&dyn_ann_ctx->mtx); + AddExpectRace(&dyn_ann_ctx->benign, + f, l, mem, size, desc); + DPrintf("Add benign race: %s addr=%zx %s:%d\n", desc, mem, f, l); +} + +// FIXME: Turn it off later. WTF is benign race?1?? Go talk to Hans Boehm. +// SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateBenignRaceSized(char *f, int l, uptr mem, uptr size, char *desc) { + SCOPED_ANNOTATION(AnnotateBenignRaceSized); + BenignRaceImpl(f, l, mem, size, desc); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateBenignRace(char *f, int l, uptr mem, char *desc) { + SCOPED_ANNOTATION(AnnotateBenignRace); + BenignRaceImpl(f, l, mem, 1, desc); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateIgnoreReadsBegin(char *f, int l) { + SCOPED_ANNOTATION(AnnotateIgnoreReadsBegin); + IgnoreCtl(cur_thread(), false, true); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateIgnoreReadsEnd(char *f, int l) { + SCOPED_ANNOTATION(AnnotateIgnoreReadsEnd); + IgnoreCtl(cur_thread(), false, false); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateIgnoreWritesBegin(char *f, int l) { + SCOPED_ANNOTATION(AnnotateIgnoreWritesBegin); + IgnoreCtl(cur_thread(), true, true); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateIgnoreWritesEnd(char *f, int l) { + SCOPED_ANNOTATION(AnnotateIgnoreWritesEnd); + IgnoreCtl(cur_thread(), true, false); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotatePublishMemoryRange(char *f, int l, uptr addr, uptr size) { + SCOPED_ANNOTATION(AnnotatePublishMemoryRange); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateUnpublishMemoryRange(char *f, int l, uptr addr, uptr size) { + SCOPED_ANNOTATION(AnnotateUnpublishMemoryRange); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void AnnotateThreadName(char *f, int l, char *name) { + SCOPED_ANNOTATION(AnnotateThreadName); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void WTFAnnotateHappensBefore(char *f, int l, uptr addr) { + SCOPED_ANNOTATION(AnnotateHappensBefore); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void WTFAnnotateHappensAfter(char *f, int l, uptr addr) { + SCOPED_ANNOTATION(AnnotateHappensAfter); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +void WTFAnnotateBenignRaceSized(char *f, int l, uptr mem, uptr sz, char *desc) { + SCOPED_ANNOTATION(AnnotateBenignRaceSized); +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +int RunningOnValgrind() { + return flags()->running_on_valgrind; +} + +double __attribute__((weak)) ValgrindSlowdown(void) { + return 10.0; +} + +SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE +const char *ThreadSanitizerQuery(const char *query) { + if (internal_strcmp(query, "pure_happens_before") == 0) + return "1"; + else + return "0"; +} +} // extern "C" diff --git a/libsanitizer/tsan/tsan_interface_ann.h b/libsanitizer/tsan/tsan_interface_ann.h new file mode 100644 index 0000000..1dafe61 --- /dev/null +++ b/libsanitizer/tsan/tsan_interface_ann.h @@ -0,0 +1,29 @@ +//===-- tsan_interface_ann.h ------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Interface for dynamic annotations. +//===----------------------------------------------------------------------===// +#ifndef TSAN_INTERFACE_ANN_H +#define TSAN_INTERFACE_ANN_H + +// This header should NOT include any other headers. +// All functions in this header are extern "C" and start with __tsan_. + +#ifdef __cplusplus +extern "C" { +#endif + +void __tsan_acquire(void *addr); +void __tsan_release(void *addr); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // TSAN_INTERFACE_ANN_H diff --git a/libsanitizer/tsan/tsan_interface_atomic.cc b/libsanitizer/tsan/tsan_interface_atomic.cc new file mode 100644 index 0000000..7b459f1 --- /dev/null +++ b/libsanitizer/tsan/tsan_interface_atomic.cc @@ -0,0 +1,368 @@ +//===-- tsan_interface_atomic.cc ------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_placement_new.h" +#include "tsan_interface_atomic.h" +#include "tsan_flags.h" +#include "tsan_rtl.h" + +using namespace __tsan; // NOLINT + +class ScopedAtomic { + public: + ScopedAtomic(ThreadState *thr, uptr pc, const char *func) + : thr_(thr) { + CHECK_EQ(thr_->in_rtl, 1); // 1 due to our own ScopedInRtl member. + DPrintf("#%d: %s\n", thr_->tid, func); + } + ~ScopedAtomic() { + CHECK_EQ(thr_->in_rtl, 1); + } + private: + ThreadState *thr_; + ScopedInRtl in_rtl_; +}; + +// Some shortcuts. +typedef __tsan_memory_order morder; +typedef __tsan_atomic8 a8; +typedef __tsan_atomic16 a16; +typedef __tsan_atomic32 a32; +typedef __tsan_atomic64 a64; +const int mo_relaxed = __tsan_memory_order_relaxed; +const int mo_consume = __tsan_memory_order_consume; +const int mo_acquire = __tsan_memory_order_acquire; +const int mo_release = __tsan_memory_order_release; +const int mo_acq_rel = __tsan_memory_order_acq_rel; +const int mo_seq_cst = __tsan_memory_order_seq_cst; + +static void AtomicStatInc(ThreadState *thr, uptr size, morder mo, StatType t) { + StatInc(thr, StatAtomic); + StatInc(thr, t); + StatInc(thr, size == 1 ? StatAtomic1 + : size == 2 ? StatAtomic2 + : size == 4 ? StatAtomic4 + : StatAtomic8); + StatInc(thr, mo == mo_relaxed ? StatAtomicRelaxed + : mo == mo_consume ? StatAtomicConsume + : mo == mo_acquire ? StatAtomicAcquire + : mo == mo_release ? StatAtomicRelease + : mo == mo_acq_rel ? StatAtomicAcq_Rel + : StatAtomicSeq_Cst); +} + +static bool IsLoadOrder(morder mo) { + return mo == mo_relaxed || mo == mo_consume + || mo == mo_acquire || mo == mo_seq_cst; +} + +static bool IsStoreOrder(morder mo) { + return mo == mo_relaxed || mo == mo_release || mo == mo_seq_cst; +} + +static bool IsReleaseOrder(morder mo) { + return mo == mo_release || mo == mo_acq_rel || mo == mo_seq_cst; +} + +static bool IsAcquireOrder(morder mo) { + return mo == mo_consume || mo == mo_acquire + || mo == mo_acq_rel || mo == mo_seq_cst; +} + +#define SCOPED_ATOMIC(func, ...) \ + if ((u32)mo > 100500) mo = (morder)((u32)mo - 100500); \ + mo = flags()->force_seq_cst_atomics ? (morder)mo_seq_cst : mo; \ + ThreadState *const thr = cur_thread(); \ + const uptr pc = (uptr)__builtin_return_address(0); \ + AtomicStatInc(thr, sizeof(*a), mo, StatAtomic##func); \ + ScopedAtomic sa(thr, pc, __FUNCTION__); \ + return Atomic##func(thr, pc, __VA_ARGS__); \ +/**/ + +template<typename T> +static T AtomicLoad(ThreadState *thr, uptr pc, const volatile T *a, + morder mo) { + CHECK(IsLoadOrder(mo)); + T v = *a; + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static void AtomicStore(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + CHECK(IsStoreOrder(mo)); + if (IsReleaseOrder(mo)) + ReleaseStore(thr, pc, (uptr)a); + *a = v; +} + +template<typename T> +static T AtomicExchange(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + v = __sync_lock_test_and_set(a, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static T AtomicFetchAdd(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + v = __sync_fetch_and_add(a, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static T AtomicFetchSub(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + v = __sync_fetch_and_sub(a, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static T AtomicFetchAnd(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + v = __sync_fetch_and_and(a, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static T AtomicFetchOr(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + v = __sync_fetch_and_or(a, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static T AtomicFetchXor(ThreadState *thr, uptr pc, volatile T *a, T v, + morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + v = __sync_fetch_and_xor(a, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + return v; +} + +template<typename T> +static bool AtomicCAS(ThreadState *thr, uptr pc, + volatile T *a, T *c, T v, morder mo) { + if (IsReleaseOrder(mo)) + Release(thr, pc, (uptr)a); + T cc = *c; + T pr = __sync_val_compare_and_swap(a, cc, v); + if (IsAcquireOrder(mo)) + Acquire(thr, pc, (uptr)a); + if (pr == cc) + return true; + *c = pr; + return false; +} + +static void AtomicFence(ThreadState *thr, uptr pc, morder mo) { + __sync_synchronize(); +} + +a8 __tsan_atomic8_load(const volatile a8 *a, morder mo) { + SCOPED_ATOMIC(Load, a, mo); +} + +a16 __tsan_atomic16_load(const volatile a16 *a, morder mo) { + SCOPED_ATOMIC(Load, a, mo); +} + +a32 __tsan_atomic32_load(const volatile a32 *a, morder mo) { + SCOPED_ATOMIC(Load, a, mo); +} + +a64 __tsan_atomic64_load(const volatile a64 *a, morder mo) { + SCOPED_ATOMIC(Load, a, mo); +} + +void __tsan_atomic8_store(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(Store, a, v, mo); +} + +void __tsan_atomic16_store(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(Store, a, v, mo); +} + +void __tsan_atomic32_store(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(Store, a, v, mo); +} + +void __tsan_atomic64_store(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(Store, a, v, mo); +} + +a8 __tsan_atomic8_exchange(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(Exchange, a, v, mo); +} + +a16 __tsan_atomic16_exchange(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(Exchange, a, v, mo); +} + +a32 __tsan_atomic32_exchange(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(Exchange, a, v, mo); +} + +a64 __tsan_atomic64_exchange(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(Exchange, a, v, mo); +} + +a8 __tsan_atomic8_fetch_add(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(FetchAdd, a, v, mo); +} + +a16 __tsan_atomic16_fetch_add(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(FetchAdd, a, v, mo); +} + +a32 __tsan_atomic32_fetch_add(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(FetchAdd, a, v, mo); +} + +a64 __tsan_atomic64_fetch_add(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(FetchAdd, a, v, mo); +} + +a8 __tsan_atomic8_fetch_sub(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(FetchSub, a, v, mo); +} + +a16 __tsan_atomic16_fetch_sub(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(FetchSub, a, v, mo); +} + +a32 __tsan_atomic32_fetch_sub(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(FetchSub, a, v, mo); +} + +a64 __tsan_atomic64_fetch_sub(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(FetchSub, a, v, mo); +} + +a8 __tsan_atomic8_fetch_and(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(FetchAnd, a, v, mo); +} + +a16 __tsan_atomic16_fetch_and(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(FetchAnd, a, v, mo); +} + +a32 __tsan_atomic32_fetch_and(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(FetchAnd, a, v, mo); +} + +a64 __tsan_atomic64_fetch_and(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(FetchAnd, a, v, mo); +} + +a8 __tsan_atomic8_fetch_or(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(FetchOr, a, v, mo); +} + +a16 __tsan_atomic16_fetch_or(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(FetchOr, a, v, mo); +} + +a32 __tsan_atomic32_fetch_or(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(FetchOr, a, v, mo); +} + +a64 __tsan_atomic64_fetch_or(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(FetchOr, a, v, mo); +} + +a8 __tsan_atomic8_fetch_xor(volatile a8 *a, a8 v, morder mo) { + SCOPED_ATOMIC(FetchXor, a, v, mo); +} + +a16 __tsan_atomic16_fetch_xor(volatile a16 *a, a16 v, morder mo) { + SCOPED_ATOMIC(FetchXor, a, v, mo); +} + +a32 __tsan_atomic32_fetch_xor(volatile a32 *a, a32 v, morder mo) { + SCOPED_ATOMIC(FetchXor, a, v, mo); +} + +a64 __tsan_atomic64_fetch_xor(volatile a64 *a, a64 v, morder mo) { + SCOPED_ATOMIC(FetchXor, a, v, mo); +} + +int __tsan_atomic8_compare_exchange_strong(volatile a8 *a, a8 *c, a8 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic16_compare_exchange_strong(volatile a16 *a, a16 *c, a16 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic32_compare_exchange_strong(volatile a32 *a, a32 *c, a32 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic64_compare_exchange_strong(volatile a64 *a, a64 *c, a64 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic8_compare_exchange_weak(volatile a8 *a, a8 *c, a8 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic16_compare_exchange_weak(volatile a16 *a, a16 *c, a16 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic32_compare_exchange_weak(volatile a32 *a, a32 *c, a32 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +int __tsan_atomic64_compare_exchange_weak(volatile a64 *a, a64 *c, a64 v, + morder mo) { + SCOPED_ATOMIC(CAS, a, c, v, mo); +} + +void __tsan_atomic_thread_fence(morder mo) { + char* a; + SCOPED_ATOMIC(Fence, mo); +} + +void __tsan_atomic_signal_fence(morder mo) { +} diff --git a/libsanitizer/tsan/tsan_interface_atomic.h b/libsanitizer/tsan/tsan_interface_atomic.h new file mode 100644 index 0000000..37532ce --- /dev/null +++ b/libsanitizer/tsan/tsan_interface_atomic.h @@ -0,0 +1,173 @@ +//===-- tsan_interface_atomic.h ---------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_INTERFACE_ATOMIC_H +#define TSAN_INTERFACE_ATOMIC_H + +#ifdef __cplusplus +extern "C" { +#endif + +typedef char __tsan_atomic8; +typedef short __tsan_atomic16; // NOLINT +typedef int __tsan_atomic32; +typedef long __tsan_atomic64; // NOLINT + +// Part of ABI, do not change. +// http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/atomic?view=markup +typedef enum { + __tsan_memory_order_relaxed = 1 << 0, + __tsan_memory_order_consume = 1 << 1, + __tsan_memory_order_acquire = 1 << 2, + __tsan_memory_order_release = 1 << 3, + __tsan_memory_order_acq_rel = 1 << 4, + __tsan_memory_order_seq_cst = 1 << 5 +} __tsan_memory_order; + +__tsan_atomic8 __tsan_atomic8_load(const volatile __tsan_atomic8 *a, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_load(const volatile __tsan_atomic16 *a, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_load(const volatile __tsan_atomic32 *a, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_load(const volatile __tsan_atomic64 *a, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +void __tsan_atomic8_store(volatile __tsan_atomic8 *a, __tsan_atomic8 v, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_atomic16_store(volatile __tsan_atomic16 *a, __tsan_atomic16 v, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_atomic32_store(volatile __tsan_atomic32 *a, __tsan_atomic32 v, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_atomic64_store(volatile __tsan_atomic64 *a, __tsan_atomic64 v, + __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +__tsan_atomic8 __tsan_atomic8_exchange(volatile __tsan_atomic8 *a, + __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_exchange(volatile __tsan_atomic16 *a, + __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_exchange(volatile __tsan_atomic32 *a, + __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_exchange(volatile __tsan_atomic64 *a, + __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +__tsan_atomic8 __tsan_atomic8_fetch_add(volatile __tsan_atomic8 *a, + __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_fetch_add(volatile __tsan_atomic16 *a, + __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_fetch_add(volatile __tsan_atomic32 *a, + __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_fetch_add(volatile __tsan_atomic64 *a, + __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +__tsan_atomic8 __tsan_atomic8_fetch_sub(volatile __tsan_atomic8 *a, + __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_fetch_sub(volatile __tsan_atomic16 *a, + __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_fetch_sub(volatile __tsan_atomic32 *a, + __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_fetch_sub(volatile __tsan_atomic64 *a, + __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +__tsan_atomic8 __tsan_atomic8_fetch_and(volatile __tsan_atomic8 *a, + __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_fetch_and(volatile __tsan_atomic16 *a, + __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_fetch_and(volatile __tsan_atomic32 *a, + __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_fetch_and(volatile __tsan_atomic64 *a, + __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +__tsan_atomic8 __tsan_atomic8_fetch_or(volatile __tsan_atomic8 *a, + __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_fetch_or(volatile __tsan_atomic16 *a, + __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_fetch_or(volatile __tsan_atomic32 *a, + __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_fetch_or(volatile __tsan_atomic64 *a, + __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +__tsan_atomic8 __tsan_atomic8_fetch_xor(volatile __tsan_atomic8 *a, + __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic16 __tsan_atomic16_fetch_xor(volatile __tsan_atomic16 *a, + __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic32 __tsan_atomic32_fetch_xor(volatile __tsan_atomic32 *a, + __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +__tsan_atomic64 __tsan_atomic64_fetch_xor(volatile __tsan_atomic64 *a, + __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +int __tsan_atomic8_compare_exchange_weak(volatile __tsan_atomic8 *a, + __tsan_atomic8 *c, __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +int __tsan_atomic16_compare_exchange_weak(volatile __tsan_atomic16 *a, + __tsan_atomic16 *c, __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +int __tsan_atomic32_compare_exchange_weak(volatile __tsan_atomic32 *a, + __tsan_atomic32 *c, __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +int __tsan_atomic64_compare_exchange_weak(volatile __tsan_atomic64 *a, + __tsan_atomic64 *c, __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +int __tsan_atomic8_compare_exchange_strong(volatile __tsan_atomic8 *a, + __tsan_atomic8 *c, __tsan_atomic8 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +int __tsan_atomic16_compare_exchange_strong(volatile __tsan_atomic16 *a, + __tsan_atomic16 *c, __tsan_atomic16 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +int __tsan_atomic32_compare_exchange_strong(volatile __tsan_atomic32 *a, + __tsan_atomic32 *c, __tsan_atomic32 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +int __tsan_atomic64_compare_exchange_strong(volatile __tsan_atomic64 *a, + __tsan_atomic64 *c, __tsan_atomic64 v, __tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +void __tsan_atomic_thread_fence(__tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; +void __tsan_atomic_signal_fence(__tsan_memory_order mo) + SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // #ifndef TSAN_INTERFACE_ATOMIC_H diff --git a/libsanitizer/tsan/tsan_interface_inl.h b/libsanitizer/tsan/tsan_interface_inl.h new file mode 100644 index 0000000..493e3f7 --- /dev/null +++ b/libsanitizer/tsan/tsan_interface_inl.h @@ -0,0 +1,63 @@ +//===-- tsan_interface_inl.h ------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "tsan_interface.h" +#include "tsan_rtl.h" + +#define CALLERPC ((uptr)__builtin_return_address(0)) + +using namespace __tsan; // NOLINT + +void __tsan_read1(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 0, 0); +} + +void __tsan_read2(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 1, 0); +} + +void __tsan_read4(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, 0); +} + +void __tsan_read8(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 3, 0); +} + +void __tsan_write1(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 0, 1); +} + +void __tsan_write2(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 1, 1); +} + +void __tsan_write4(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, 1); +} + +void __tsan_write8(void *addr) { + MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 3, 1); +} + +void __tsan_vptr_update(void **vptr_p, void *new_val) { + CHECK_EQ(sizeof(vptr_p), 8); + if (*vptr_p != new_val) + MemoryAccess(cur_thread(), CALLERPC, (uptr)vptr_p, 3, 1); +} + +void __tsan_func_entry(void *pc) { + FuncEntry(cur_thread(), (uptr)pc); +} + +void __tsan_func_exit() { + FuncExit(cur_thread()); +} diff --git a/libsanitizer/tsan/tsan_md5.cc b/libsanitizer/tsan/tsan_md5.cc new file mode 100644 index 0000000..6df823d --- /dev/null +++ b/libsanitizer/tsan/tsan_md5.cc @@ -0,0 +1,243 @@ +//===-- tsan_md5.cc -------------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "tsan_defs.h" + +namespace __tsan { + +#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z)))) +#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y)))) +#define H(x, y, z) ((x) ^ (y) ^ (z)) +#define I(x, y, z) ((y) ^ ((x) | ~(z))) + +#define STEP(f, a, b, c, d, x, t, s) \ + (a) += f((b), (c), (d)) + (x) + (t); \ + (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \ + (a) += (b); + +#define SET(n) \ + (*(MD5_u32plus *)&ptr[(n) * 4]) +#define GET(n) \ + SET(n) + +typedef unsigned int MD5_u32plus; +typedef unsigned long ulong_t; // NOLINT + +typedef struct { + MD5_u32plus lo, hi; + MD5_u32plus a, b, c, d; + unsigned char buffer[64]; + MD5_u32plus block[16]; +} MD5_CTX; + +static void *body(MD5_CTX *ctx, void *data, ulong_t size) { + unsigned char *ptr; + MD5_u32plus a, b, c, d; + MD5_u32plus saved_a, saved_b, saved_c, saved_d; + + ptr = (unsigned char*)data; + + a = ctx->a; + b = ctx->b; + c = ctx->c; + d = ctx->d; + + do { + saved_a = a; + saved_b = b; + saved_c = c; + saved_d = d; + + STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7) + STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12) + STEP(F, c, d, a, b, SET(2), 0x242070db, 17) + STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22) + STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7) + STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12) + STEP(F, c, d, a, b, SET(6), 0xa8304613, 17) + STEP(F, b, c, d, a, SET(7), 0xfd469501, 22) + STEP(F, a, b, c, d, SET(8), 0x698098d8, 7) + STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12) + STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17) + STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22) + STEP(F, a, b, c, d, SET(12), 0x6b901122, 7) + STEP(F, d, a, b, c, SET(13), 0xfd987193, 12) + STEP(F, c, d, a, b, SET(14), 0xa679438e, 17) + STEP(F, b, c, d, a, SET(15), 0x49b40821, 22) + + STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5) + STEP(G, d, a, b, c, GET(6), 0xc040b340, 9) + STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14) + STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20) + STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5) + STEP(G, d, a, b, c, GET(10), 0x02441453, 9) + STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14) + STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20) + STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5) + STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9) + STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14) + STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20) + STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5) + STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9) + STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14) + STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20) + + STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4) + STEP(H, d, a, b, c, GET(8), 0x8771f681, 11) + STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16) + STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23) + STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4) + STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11) + STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16) + STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23) + STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4) + STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11) + STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16) + STEP(H, b, c, d, a, GET(6), 0x04881d05, 23) + STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4) + STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11) + STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16) + STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23) + + STEP(I, a, b, c, d, GET(0), 0xf4292244, 6) + STEP(I, d, a, b, c, GET(7), 0x432aff97, 10) + STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15) + STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21) + STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6) + STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10) + STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15) + STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21) + STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6) + STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10) + STEP(I, c, d, a, b, GET(6), 0xa3014314, 15) + STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21) + STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6) + STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10) + STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15) + STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21) + + a += saved_a; + b += saved_b; + c += saved_c; + d += saved_d; + + ptr += 64; + } while (size -= 64); + + ctx->a = a; + ctx->b = b; + ctx->c = c; + ctx->d = d; + + return ptr; +} + +void MD5_Init(MD5_CTX *ctx) { + ctx->a = 0x67452301; + ctx->b = 0xefcdab89; + ctx->c = 0x98badcfe; + ctx->d = 0x10325476; + + ctx->lo = 0; + ctx->hi = 0; +} + +void MD5_Update(MD5_CTX *ctx, void *data, ulong_t size) { + MD5_u32plus saved_lo; + ulong_t used, free; + + saved_lo = ctx->lo; + if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo) + ctx->hi++; + ctx->hi += size >> 29; + + used = saved_lo & 0x3f; + + if (used) { + free = 64 - used; + + if (size < free) { + internal_memcpy(&ctx->buffer[used], data, size); + return; + } + + internal_memcpy(&ctx->buffer[used], data, free); + data = (unsigned char *)data + free; + size -= free; + body(ctx, ctx->buffer, 64); + } + + if (size >= 64) { + data = body(ctx, data, size & ~(ulong_t)0x3f); + size &= 0x3f; + } + + internal_memcpy(ctx->buffer, data, size); +} + +void MD5_Final(unsigned char *result, MD5_CTX *ctx) { + ulong_t used, free; + + used = ctx->lo & 0x3f; + + ctx->buffer[used++] = 0x80; + + free = 64 - used; + + if (free < 8) { + internal_memset(&ctx->buffer[used], 0, free); + body(ctx, ctx->buffer, 64); + used = 0; + free = 64; + } + + internal_memset(&ctx->buffer[used], 0, free - 8); + + ctx->lo <<= 3; + ctx->buffer[56] = ctx->lo; + ctx->buffer[57] = ctx->lo >> 8; + ctx->buffer[58] = ctx->lo >> 16; + ctx->buffer[59] = ctx->lo >> 24; + ctx->buffer[60] = ctx->hi; + ctx->buffer[61] = ctx->hi >> 8; + ctx->buffer[62] = ctx->hi >> 16; + ctx->buffer[63] = ctx->hi >> 24; + + body(ctx, ctx->buffer, 64); + + result[0] = ctx->a; + result[1] = ctx->a >> 8; + result[2] = ctx->a >> 16; + result[3] = ctx->a >> 24; + result[4] = ctx->b; + result[5] = ctx->b >> 8; + result[6] = ctx->b >> 16; + result[7] = ctx->b >> 24; + result[8] = ctx->c; + result[9] = ctx->c >> 8; + result[10] = ctx->c >> 16; + result[11] = ctx->c >> 24; + result[12] = ctx->d; + result[13] = ctx->d >> 8; + result[14] = ctx->d >> 16; + result[15] = ctx->d >> 24; + + internal_memset(ctx, 0, sizeof(*ctx)); +} + +MD5Hash md5_hash(const void *data, uptr size) { + MD5Hash res; + MD5_CTX ctx; + MD5_Init(&ctx); + MD5_Update(&ctx, (void*)data, size); + MD5_Final((unsigned char*)&res.hash[0], &ctx); + return res; +} +} diff --git a/libsanitizer/tsan/tsan_mman.cc b/libsanitizer/tsan/tsan_mman.cc new file mode 100644 index 0000000..ba4252e --- /dev/null +++ b/libsanitizer/tsan/tsan_mman.cc @@ -0,0 +1,159 @@ +//===-- tsan_mman.cc ------------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "tsan_mman.h" +#include "tsan_rtl.h" +#include "tsan_report.h" +#include "tsan_flags.h" + +// May be overriden by front-end. +extern "C" void WEAK __tsan_malloc_hook(void *ptr, uptr size) { + (void)ptr; + (void)size; +} + +extern "C" void WEAK __tsan_free_hook(void *ptr) { + (void)ptr; +} + +namespace __tsan { + +static char allocator_placeholder[sizeof(Allocator)] ALIGNED(64); +Allocator *allocator() { + return reinterpret_cast<Allocator*>(&allocator_placeholder); +} + +void InitializeAllocator() { + allocator()->Init(); +} + +void AlloctorThreadFinish(ThreadState *thr) { + allocator()->SwallowCache(&thr->alloc_cache); +} + +static void SignalUnsafeCall(ThreadState *thr, uptr pc) { + if (!thr->in_signal_handler || !flags()->report_signal_unsafe) + return; + Context *ctx = CTX(); + StackTrace stack; + stack.ObtainCurrent(thr, pc); + ScopedReport rep(ReportTypeSignalUnsafe); + if (!IsFiredSuppression(ctx, rep, stack)) { + rep.AddStack(&stack); + OutputReport(ctx, rep, rep.GetReport()->stacks[0]); + } +} + +void *user_alloc(ThreadState *thr, uptr pc, uptr sz, uptr align) { + CHECK_GT(thr->in_rtl, 0); + void *p = allocator()->Allocate(&thr->alloc_cache, sz, align); + if (p == 0) + return 0; + MBlock *b = (MBlock*)allocator()->GetMetaData(p); + b->size = sz; + b->alloc_tid = thr->unique_id; + b->alloc_stack_id = CurrentStackId(thr, pc); + if (CTX() && CTX()->initialized) { + MemoryRangeImitateWrite(thr, pc, (uptr)p, sz); + } + DPrintf("#%d: alloc(%zu) = %p\n", thr->tid, sz, p); + SignalUnsafeCall(thr, pc); + return p; +} + +void user_free(ThreadState *thr, uptr pc, void *p) { + CHECK_GT(thr->in_rtl, 0); + CHECK_NE(p, (void*)0); + DPrintf("#%d: free(%p)\n", thr->tid, p); + MBlock *b = (MBlock*)allocator()->GetMetaData(p); + if (b->head) { + Lock l(&b->mtx); + for (SyncVar *s = b->head; s;) { + SyncVar *res = s; + s = s->next; + StatInc(thr, StatSyncDestroyed); + res->mtx.Lock(); + res->mtx.Unlock(); + DestroyAndFree(res); + } + b->head = 0; + } + if (CTX() && CTX()->initialized && thr->in_rtl == 1) { + MemoryRangeFreed(thr, pc, (uptr)p, b->size); + } + allocator()->Deallocate(&thr->alloc_cache, p); + SignalUnsafeCall(thr, pc); +} + +void *user_realloc(ThreadState *thr, uptr pc, void *p, uptr sz) { + CHECK_GT(thr->in_rtl, 0); + void *p2 = 0; + // FIXME: Handle "shrinking" more efficiently, + // it seems that some software actually does this. + if (sz) { + p2 = user_alloc(thr, pc, sz); + if (p2 == 0) + return 0; + if (p) { + MBlock *b = user_mblock(thr, p); + internal_memcpy(p2, p, min(b->size, sz)); + } + } + if (p) { + user_free(thr, pc, p); + } + return p2; +} + +MBlock *user_mblock(ThreadState *thr, void *p) { + // CHECK_GT(thr->in_rtl, 0); + CHECK_NE(p, (void*)0); + return (MBlock*)allocator()->GetMetaData(p); +} + +void invoke_malloc_hook(void *ptr, uptr size) { + Context *ctx = CTX(); + ThreadState *thr = cur_thread(); + if (ctx == 0 || !ctx->initialized || thr->in_rtl) + return; + __tsan_malloc_hook(ptr, size); +} + +void invoke_free_hook(void *ptr) { + Context *ctx = CTX(); + ThreadState *thr = cur_thread(); + if (ctx == 0 || !ctx->initialized || thr->in_rtl) + return; + __tsan_free_hook(ptr); +} + +void *internal_alloc(MBlockType typ, uptr sz) { + ThreadState *thr = cur_thread(); + CHECK_GT(thr->in_rtl, 0); + if (thr->nomalloc) { + thr->nomalloc = 0; // CHECK calls internal_malloc(). + CHECK(0); + } + return InternalAlloc(sz); +} + +void internal_free(void *p) { + ThreadState *thr = cur_thread(); + CHECK_GT(thr->in_rtl, 0); + if (thr->nomalloc) { + thr->nomalloc = 0; // CHECK calls internal_malloc(). + CHECK(0); + } + InternalFree(p); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_mman.h b/libsanitizer/tsan/tsan_mman.h new file mode 100644 index 0000000..326bda7 --- /dev/null +++ b/libsanitizer/tsan/tsan_mman.h @@ -0,0 +1,77 @@ +//===-- tsan_mman.h ---------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_MMAN_H +#define TSAN_MMAN_H + +#include "tsan_defs.h" + +namespace __tsan { + +const uptr kDefaultAlignment = 16; + +void InitializeAllocator(); +void AlloctorThreadFinish(ThreadState *thr); + +// For user allocations. +void *user_alloc(ThreadState *thr, uptr pc, uptr sz, + uptr align = kDefaultAlignment); +// Does not accept NULL. +void user_free(ThreadState *thr, uptr pc, void *p); +void *user_realloc(ThreadState *thr, uptr pc, void *p, uptr sz); +void *user_alloc_aligned(ThreadState *thr, uptr pc, uptr sz, uptr align); +// Given the pointer p into a valid allocated block, +// returns the descriptor of the block. +MBlock *user_mblock(ThreadState *thr, void *p); + +// Invoking malloc/free hooks that may be installed by the user. +void invoke_malloc_hook(void *ptr, uptr size); +void invoke_free_hook(void *ptr); + +enum MBlockType { + MBlockScopedBuf, + MBlockString, + MBlockStackTrace, + MBlockShadowStack, + MBlockSync, + MBlockClock, + MBlockThreadContex, + MBlockDeadInfo, + MBlockRacyStacks, + MBlockRacyAddresses, + MBlockAtExit, + MBlockFlag, + MBlockReport, + MBlockReportMop, + MBlockReportThread, + MBlockReportMutex, + MBlockReportLoc, + MBlockReportStack, + MBlockSuppression, + MBlockExpectRace, + MBlockSignal, + + // This must be the last. + MBlockTypeCount +}; + +// For internal data structures. +void *internal_alloc(MBlockType typ, uptr sz); +void internal_free(void *p); + +template<typename T> +void DestroyAndFree(T *&p) { + p->~T(); + internal_free(p); + p = 0; +} + +} // namespace __tsan +#endif // TSAN_MMAN_H diff --git a/libsanitizer/tsan/tsan_mutex.cc b/libsanitizer/tsan/tsan_mutex.cc new file mode 100644 index 0000000..83af029 --- /dev/null +++ b/libsanitizer/tsan/tsan_mutex.cc @@ -0,0 +1,261 @@ +//===-- tsan_mutex.cc -----------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "sanitizer_common/sanitizer_libc.h" +#include "tsan_mutex.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" + +namespace __tsan { + +// Simple reader-writer spin-mutex. Optimized for not-so-contended case. +// Readers have preference, can possibly starvate writers. + +// The table fixes what mutexes can be locked under what mutexes. +// E.g. if the row for MutexTypeThreads contains MutexTypeReport, +// then Report mutex can be locked while under Threads mutex. +// The leaf mutexes can be locked under any other mutexes. +// Recursive locking is not supported. +const MutexType MutexTypeLeaf = (MutexType)-1; +static MutexType CanLockTab[MutexTypeCount][MutexTypeCount] = { + /*0 MutexTypeInvalid*/ {}, + /*1 MutexTypeTrace*/ {MutexTypeLeaf}, + /*2 MutexTypeThreads*/ {MutexTypeReport}, + /*3 MutexTypeReport*/ {}, + /*4 MutexTypeSyncVar*/ {}, + /*5 MutexTypeSyncTab*/ {MutexTypeSyncVar}, + /*6 MutexTypeSlab*/ {MutexTypeLeaf}, + /*7 MutexTypeAnnotations*/ {}, + /*8 MutexTypeAtExit*/ {MutexTypeSyncTab}, +}; + +static bool CanLockAdj[MutexTypeCount][MutexTypeCount]; + +void InitializeMutex() { + // Build the "can lock" adjacency matrix. + // If [i][j]==true, then one can lock mutex j while under mutex i. + const int N = MutexTypeCount; + int cnt[N] = {}; + bool leaf[N] = {}; + for (int i = 1; i < N; i++) { + for (int j = 0; j < N; j++) { + MutexType z = CanLockTab[i][j]; + if (z == MutexTypeInvalid) + continue; + if (z == MutexTypeLeaf) { + CHECK(!leaf[i]); + leaf[i] = true; + continue; + } + CHECK(!CanLockAdj[i][(int)z]); + CanLockAdj[i][(int)z] = true; + cnt[i]++; + } + } + for (int i = 0; i < N; i++) { + CHECK(!leaf[i] || cnt[i] == 0); + } + // Add leaf mutexes. + for (int i = 0; i < N; i++) { + if (!leaf[i]) + continue; + for (int j = 0; j < N; j++) { + if (i == j || leaf[j] || j == MutexTypeInvalid) + continue; + CHECK(!CanLockAdj[j][i]); + CanLockAdj[j][i] = true; + } + } + // Build the transitive closure. + bool CanLockAdj2[MutexTypeCount][MutexTypeCount]; + for (int i = 0; i < N; i++) { + for (int j = 0; j < N; j++) { + CanLockAdj2[i][j] = CanLockAdj[i][j]; + } + } + for (int k = 0; k < N; k++) { + for (int i = 0; i < N; i++) { + for (int j = 0; j < N; j++) { + if (CanLockAdj2[i][k] && CanLockAdj2[k][j]) { + CanLockAdj2[i][j] = true; + } + } + } + } +#if 0 + TsanPrintf("Can lock graph:\n"); + for (int i = 0; i < N; i++) { + for (int j = 0; j < N; j++) { + TsanPrintf("%d ", CanLockAdj[i][j]); + } + TsanPrintf("\n"); + } + TsanPrintf("Can lock graph closure:\n"); + for (int i = 0; i < N; i++) { + for (int j = 0; j < N; j++) { + TsanPrintf("%d ", CanLockAdj2[i][j]); + } + TsanPrintf("\n"); + } +#endif + // Verify that the graph is acyclic. + for (int i = 0; i < N; i++) { + if (CanLockAdj2[i][i]) { + TsanPrintf("Mutex %d participates in a cycle\n", i); + Die(); + } + } +} + +DeadlockDetector::DeadlockDetector() { + // Rely on zero initialization because some mutexes can be locked before ctor. +} + +void DeadlockDetector::Lock(MutexType t) { + // TsanPrintf("LOCK %d @%zu\n", t, seq_ + 1); + u64 max_seq = 0; + u64 max_idx = MutexTypeInvalid; + for (int i = 0; i != MutexTypeCount; i++) { + if (locked_[i] == 0) + continue; + CHECK_NE(locked_[i], max_seq); + if (max_seq < locked_[i]) { + max_seq = locked_[i]; + max_idx = i; + } + } + locked_[t] = ++seq_; + if (max_idx == MutexTypeInvalid) + return; + // TsanPrintf(" last %d @%zu\n", max_idx, max_seq); + if (!CanLockAdj[max_idx][t]) { + TsanPrintf("ThreadSanitizer: internal deadlock detected\n"); + TsanPrintf("ThreadSanitizer: can't lock %d while under %zu\n", + t, (uptr)max_idx); + CHECK(0); + } +} + +void DeadlockDetector::Unlock(MutexType t) { + // TsanPrintf("UNLO %d @%zu #%zu\n", t, seq_, locked_[t]); + CHECK(locked_[t]); + locked_[t] = 0; +} + +const uptr kUnlocked = 0; +const uptr kWriteLock = 1; +const uptr kReadLock = 2; + +class Backoff { + public: + Backoff() + : iter_() { + } + + bool Do() { + if (iter_++ < kActiveSpinIters) + proc_yield(kActiveSpinCnt); + else + internal_sched_yield(); + return true; + } + + u64 Contention() const { + u64 active = iter_ % kActiveSpinIters; + u64 passive = iter_ - active; + return active + 10 * passive; + } + + private: + int iter_; + static const int kActiveSpinIters = 10; + static const int kActiveSpinCnt = 20; +}; + +Mutex::Mutex(MutexType type, StatType stat_type) { + CHECK_GT(type, MutexTypeInvalid); + CHECK_LT(type, MutexTypeCount); +#if TSAN_DEBUG + type_ = type; +#endif +#if TSAN_COLLECT_STATS + stat_type_ = stat_type; +#endif + atomic_store(&state_, kUnlocked, memory_order_relaxed); +} + +Mutex::~Mutex() { + CHECK_EQ(atomic_load(&state_, memory_order_relaxed), kUnlocked); +} + +void Mutex::Lock() { +#if TSAN_DEBUG && !TSAN_GO + cur_thread()->deadlock_detector.Lock(type_); +#endif + uptr cmp = kUnlocked; + if (atomic_compare_exchange_strong(&state_, &cmp, kWriteLock, + memory_order_acquire)) + return; + for (Backoff backoff; backoff.Do();) { + if (atomic_load(&state_, memory_order_relaxed) == kUnlocked) { + cmp = kUnlocked; + if (atomic_compare_exchange_weak(&state_, &cmp, kWriteLock, + memory_order_acquire)) { +#if TSAN_COLLECT_STATS + StatInc(cur_thread(), stat_type_, backoff.Contention()); +#endif + return; + } + } + } +} + +void Mutex::Unlock() { + uptr prev = atomic_fetch_sub(&state_, kWriteLock, memory_order_release); + (void)prev; + DCHECK_NE(prev & kWriteLock, 0); +#if TSAN_DEBUG && !TSAN_GO + cur_thread()->deadlock_detector.Unlock(type_); +#endif +} + +void Mutex::ReadLock() { +#if TSAN_DEBUG && !TSAN_GO + cur_thread()->deadlock_detector.Lock(type_); +#endif + uptr prev = atomic_fetch_add(&state_, kReadLock, memory_order_acquire); + if ((prev & kWriteLock) == 0) + return; + for (Backoff backoff; backoff.Do();) { + prev = atomic_load(&state_, memory_order_acquire); + if ((prev & kWriteLock) == 0) { +#if TSAN_COLLECT_STATS + StatInc(cur_thread(), stat_type_, backoff.Contention()); +#endif + return; + } + } +} + +void Mutex::ReadUnlock() { + uptr prev = atomic_fetch_sub(&state_, kReadLock, memory_order_release); + (void)prev; + DCHECK_EQ(prev & kWriteLock, 0); + DCHECK_GT(prev & ~kWriteLock, 0); +#if TSAN_DEBUG && !TSAN_GO + cur_thread()->deadlock_detector.Unlock(type_); +#endif +} + +void Mutex::CheckLocked() { + CHECK_NE(atomic_load(&state_, memory_order_relaxed), 0); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_mutex.h b/libsanitizer/tsan/tsan_mutex.h new file mode 100644 index 0000000..118066e --- /dev/null +++ b/libsanitizer/tsan/tsan_mutex.h @@ -0,0 +1,78 @@ +//===-- tsan_mutex.h --------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_MUTEX_H +#define TSAN_MUTEX_H + +#include "sanitizer_common/sanitizer_atomic.h" +#include "sanitizer_common/sanitizer_mutex.h" +#include "tsan_defs.h" + +namespace __tsan { + +enum MutexType { + MutexTypeInvalid, + MutexTypeTrace, + MutexTypeThreads, + MutexTypeReport, + MutexTypeSyncVar, + MutexTypeSyncTab, + MutexTypeSlab, + MutexTypeAnnotations, + MutexTypeAtExit, + + // This must be the last. + MutexTypeCount +}; + +class Mutex { + public: + explicit Mutex(MutexType type, StatType stat_type); + ~Mutex(); + + void Lock(); + void Unlock(); + + void ReadLock(); + void ReadUnlock(); + + void CheckLocked(); + + private: + atomic_uintptr_t state_; +#if TSAN_DEBUG + MutexType type_; +#endif +#if TSAN_COLLECT_STATS + StatType stat_type_; +#endif + + Mutex(const Mutex&); + void operator = (const Mutex&); +}; + +typedef GenericScopedLock<Mutex> Lock; +typedef GenericScopedReadLock<Mutex> ReadLock; + +class DeadlockDetector { + public: + DeadlockDetector(); + void Lock(MutexType t); + void Unlock(MutexType t); + private: + u64 seq_; + u64 locked_[MutexTypeCount]; +}; + +void InitializeMutex(); + +} // namespace __tsan + +#endif // TSAN_MUTEX_H diff --git a/libsanitizer/tsan/tsan_platform.h b/libsanitizer/tsan/tsan_platform.h new file mode 100644 index 0000000..d7a4cf7 --- /dev/null +++ b/libsanitizer/tsan/tsan_platform.h @@ -0,0 +1,100 @@ +//===-- tsan_platform.h -----------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Platform-specific code. +//===----------------------------------------------------------------------===// + +#ifndef TSAN_PLATFORM_H +#define TSAN_PLATFORM_H + +#include "tsan_rtl.h" + +#if __LP64__ +namespace __tsan { + +#if defined(TSAN_GO) +static const uptr kLinuxAppMemBeg = 0x000000000000ULL; +static const uptr kLinuxAppMemEnd = 0x00fcffffffffULL; +static const uptr kLinuxShadowMsk = 0x100000000000ULL; +// TSAN_COMPAT_SHADOW is intended for COMPAT virtual memory layout, +// when memory addresses are of the 0x2axxxxxxxxxx form. +// The option is enabled with 'setarch x86_64 -L'. +#elif defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW +static const uptr kLinuxAppMemBeg = 0x290000000000ULL; +static const uptr kLinuxAppMemEnd = 0x7fffffffffffULL; +#else +static const uptr kLinuxAppMemBeg = 0x7cf000000000ULL; +static const uptr kLinuxAppMemEnd = 0x7fffffffffffULL; +#endif + +static const uptr kLinuxAppMemMsk = 0x7c0000000000ULL; + +// This has to be a macro to allow constant initialization of constants below. +#ifndef TSAN_GO +#define MemToShadow(addr) \ + (((addr) & ~(kLinuxAppMemMsk | (kShadowCell - 1))) * kShadowCnt) +#else +#define MemToShadow(addr) \ + ((((addr) & ~(kShadowCell - 1)) * kShadowCnt) | kLinuxShadowMsk) +#endif + +static const uptr kLinuxShadowBeg = MemToShadow(kLinuxAppMemBeg); +static const uptr kLinuxShadowEnd = + MemToShadow(kLinuxAppMemEnd) | (kPageSize - 1); + +static inline bool IsAppMem(uptr mem) { + return mem >= kLinuxAppMemBeg && mem <= kLinuxAppMemEnd; +} + +static inline bool IsShadowMem(uptr mem) { + return mem >= kLinuxShadowBeg && mem <= kLinuxShadowEnd; +} + +static inline uptr ShadowToMem(uptr shadow) { + CHECK(IsShadowMem(shadow)); +#ifdef TSAN_GO + return (shadow & ~kLinuxShadowMsk) / kShadowCnt; +#else + return (shadow / kShadowCnt) | kLinuxAppMemMsk; +#endif +} + +// For COMPAT mapping returns an alternative address +// that mapped to the same shadow address. +// COMPAT mapping is not quite one-to-one. +static inline uptr AlternativeAddress(uptr addr) { +#if defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW + return (addr & ~kLinuxAppMemMsk) | 0x280000000000ULL; +#else + return 0; +#endif +} + +uptr GetShadowMemoryConsumption(); +void FlushShadowMemory(); + +const char *InitializePlatform(); +void FinalizePlatform(); + +void internal_start_thread(void(*func)(void*), void *arg); + +// Says whether the addr relates to a global var. +// Guesses with high probability, may yield both false positives and negatives. +bool IsGlobalVar(uptr addr); +uptr GetTlsSize(); +void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, + uptr *tls_addr, uptr *tls_size); + +} // namespace __tsan + +#else // __LP64__ +# error "Only 64-bit is supported" +#endif + +#endif // TSAN_PLATFORM_H diff --git a/libsanitizer/tsan/tsan_platform_linux.cc b/libsanitizer/tsan/tsan_platform_linux.cc new file mode 100644 index 0000000..d7de503 --- /dev/null +++ b/libsanitizer/tsan/tsan_platform_linux.cc @@ -0,0 +1,274 @@ +//===-- tsan_platform_linux.cc --------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Linux-specific code. +//===----------------------------------------------------------------------===// + +#ifdef __linux__ + +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_procmaps.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" +#include "tsan_flags.h" + +#include <asm/prctl.h> +#include <fcntl.h> +#include <pthread.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> +#include <sys/mman.h> +#include <sys/prctl.h> +#include <sys/syscall.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/resource.h> +#include <sys/stat.h> +#include <unistd.h> +#include <errno.h> +#include <sched.h> +#include <dlfcn.h> + +extern "C" int arch_prctl(int code, __sanitizer::uptr *addr); + +namespace __tsan { + +#ifndef TSAN_GO +ScopedInRtl::ScopedInRtl() + : thr_(cur_thread()) { + in_rtl_ = thr_->in_rtl; + thr_->in_rtl++; + errno_ = errno; +} + +ScopedInRtl::~ScopedInRtl() { + thr_->in_rtl--; + errno = errno_; + CHECK_EQ(in_rtl_, thr_->in_rtl); +} +#else +ScopedInRtl::ScopedInRtl() { +} + +ScopedInRtl::~ScopedInRtl() { +} +#endif + +uptr GetShadowMemoryConsumption() { + return 0; +} + +void FlushShadowMemory() { + madvise((void*)kLinuxShadowBeg, + kLinuxShadowEnd - kLinuxShadowBeg, + MADV_DONTNEED); +} + +#ifndef TSAN_GO +static void ProtectRange(uptr beg, uptr end) { + ScopedInRtl in_rtl; + CHECK_LE(beg, end); + if (beg == end) + return; + if (beg != (uptr)Mprotect(beg, end - beg)) { + TsanPrintf("FATAL: ThreadSanitizer can not protect [%zx,%zx]\n", beg, end); + TsanPrintf("FATAL: Make sure you are not using unlimited stack\n"); + Die(); + } +} +#endif + +void InitializeShadowMemory() { + uptr shadow = (uptr)MmapFixedNoReserve(kLinuxShadowBeg, + kLinuxShadowEnd - kLinuxShadowBeg); + if (shadow != kLinuxShadowBeg) { + TsanPrintf("FATAL: ThreadSanitizer can not mmap the shadow memory\n"); + TsanPrintf("FATAL: Make sure to compile with -fPIE and " + "to link with -pie (%p, %p).\n", shadow, kLinuxShadowBeg); + Die(); + } +#ifndef TSAN_GO + const uptr kClosedLowBeg = 0x200000; + const uptr kClosedLowEnd = kLinuxShadowBeg - 1; + const uptr kClosedMidBeg = kLinuxShadowEnd + 1; + const uptr kClosedMidEnd = kLinuxAppMemBeg - 1; + ProtectRange(kClosedLowBeg, kClosedLowEnd); + ProtectRange(kClosedMidBeg, kClosedMidEnd); +#endif +#ifndef TSAN_GO + DPrintf("kClosedLow %zx-%zx (%zuGB)\n", + kClosedLowBeg, kClosedLowEnd, (kClosedLowEnd - kClosedLowBeg) >> 30); +#endif + DPrintf("kLinuxShadow %zx-%zx (%zuGB)\n", + kLinuxShadowBeg, kLinuxShadowEnd, + (kLinuxShadowEnd - kLinuxShadowBeg) >> 30); +#ifndef TSAN_GO + DPrintf("kClosedMid %zx-%zx (%zuGB)\n", + kClosedMidBeg, kClosedMidEnd, (kClosedMidEnd - kClosedMidBeg) >> 30); +#endif + DPrintf("kLinuxAppMem %zx-%zx (%zuGB)\n", + kLinuxAppMemBeg, kLinuxAppMemEnd, + (kLinuxAppMemEnd - kLinuxAppMemBeg) >> 30); + DPrintf("stack %zx\n", (uptr)&shadow); +} + +static uptr g_data_start; +static uptr g_data_end; + +#ifndef TSAN_GO +static void CheckPIE() { + // Ensure that the binary is indeed compiled with -pie. + MemoryMappingLayout proc_maps; + uptr start, end; + if (proc_maps.Next(&start, &end, + /*offset*/0, /*filename*/0, /*filename_size*/0)) { + if ((u64)start < kLinuxAppMemBeg) { + TsanPrintf("FATAL: ThreadSanitizer can not mmap the shadow memory (" + "something is mapped at 0x%zx < 0x%zx)\n", + start, kLinuxAppMemBeg); + TsanPrintf("FATAL: Make sure to compile with -fPIE" + " and to link with -pie.\n"); + Die(); + } + } +} + +static void InitDataSeg() { + MemoryMappingLayout proc_maps; + uptr start, end, offset; + char name[128]; + bool prev_is_data = false; + while (proc_maps.Next(&start, &end, &offset, name, ARRAY_SIZE(name))) { + DPrintf("%p-%p %p %s\n", start, end, offset, name); + bool is_data = offset != 0 && name[0] != 0; + // BSS may get merged with [heap] in /proc/self/maps. This is not very + // reliable. + bool is_bss = offset == 0 && + (name[0] == 0 || internal_strcmp(name, "[heap]") == 0) && prev_is_data; + if (g_data_start == 0 && is_data) + g_data_start = start; + if (is_bss) + g_data_end = end; + prev_is_data = is_data; + } + DPrintf("guessed data_start=%p data_end=%p\n", g_data_start, g_data_end); + CHECK_LT(g_data_start, g_data_end); + CHECK_GE((uptr)&g_data_start, g_data_start); + CHECK_LT((uptr)&g_data_start, g_data_end); +} + +static uptr g_tls_size; + +#ifdef __i386__ +# define INTERNAL_FUNCTION __attribute__((regparm(3), stdcall)) +#else +# define INTERNAL_FUNCTION +#endif +extern "C" void _dl_get_tls_static_info(size_t*, size_t*) + __attribute__((weak)) INTERNAL_FUNCTION; + +static int InitTlsSize() { + typedef void (*get_tls_func)(size_t*, size_t*) INTERNAL_FUNCTION; + get_tls_func get_tls = &_dl_get_tls_static_info; + if (get_tls == 0) { + void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info"); + CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr)); + internal_memcpy(&get_tls, &get_tls_static_info_ptr, + sizeof(get_tls_static_info_ptr)); + } + CHECK_NE(get_tls, 0); + size_t tls_size = 0; + size_t tls_align = 0; + get_tls(&tls_size, &tls_align); + return tls_size; +} +#endif // #ifndef TSAN_GO + +const char *InitializePlatform() { + void *p = 0; + if (sizeof(p) == 8) { + // Disable core dumps, dumping of 16TB usually takes a bit long. + // The following magic is to prevent clang from replacing it with memset. + volatile rlimit lim; + lim.rlim_cur = 0; + lim.rlim_max = 0; + setrlimit(RLIMIT_CORE, (rlimit*)&lim); + } + // TSan doesn't play well with unlimited stack size (as stack + // overlaps with shadow memory). If we detect unlimited stack size, + // we re-exec the program with limited stack size as a best effort. + if (StackSizeIsUnlimited()) { + const uptr kMaxStackSize = 32 * 1024 * 1024; // 32 Mb + Report("WARNING: Program is run with unlimited stack size, which " + "wouldn't work with ThreadSanitizer.\n"); + Report("Re-execing with stack size limited to %zd bytes.\n", kMaxStackSize); + SetStackSizeLimitInBytes(kMaxStackSize); + ReExec(); + } + +#ifndef TSAN_GO + CheckPIE(); + g_tls_size = (uptr)InitTlsSize(); + InitDataSeg(); +#endif + return getenv("TSAN_OPTIONS"); +} + +void FinalizePlatform() { + fflush(0); +} + +uptr GetTlsSize() { +#ifndef TSAN_GO + return g_tls_size; +#else + return 0; +#endif +} + +void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, + uptr *tls_addr, uptr *tls_size) { +#ifndef TSAN_GO + arch_prctl(ARCH_GET_FS, tls_addr); + *tls_addr -= g_tls_size; + *tls_size = g_tls_size; + + uptr stack_top, stack_bottom; + GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom); + *stk_addr = stack_bottom; + *stk_size = stack_top - stack_bottom; + + if (!main) { + // If stack and tls intersect, make them non-intersecting. + if (*tls_addr > *stk_addr && *tls_addr < *stk_addr + *stk_size) { + CHECK_GT(*tls_addr + *tls_size, *stk_addr); + CHECK_LE(*tls_addr + *tls_size, *stk_addr + *stk_size); + *stk_size -= *tls_size; + *tls_addr = *stk_addr + *stk_size; + } + } +#else + *stk_addr = 0; + *stk_size = 0; + *tls_addr = 0; + *tls_size = 0; +#endif +} + +bool IsGlobalVar(uptr addr) { + return g_data_start && addr >= g_data_start && addr < g_data_end; +} + +} // namespace __tsan + +#endif // #ifdef __linux__ diff --git a/libsanitizer/tsan/tsan_platform_mac.cc b/libsanitizer/tsan/tsan_platform_mac.cc new file mode 100644 index 0000000..e22a500 --- /dev/null +++ b/libsanitizer/tsan/tsan_platform_mac.cc @@ -0,0 +1,102 @@ +//===-- tsan_platform_mac.cc ----------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Mac-specific code. +//===----------------------------------------------------------------------===// + +#ifdef __APPLE__ + +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_procmaps.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" +#include "tsan_flags.h" + +#include <pthread.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> +#include <sys/mman.h> +#include <sys/syscall.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/resource.h> +#include <sys/stat.h> +#include <unistd.h> +#include <errno.h> +#include <sched.h> + +namespace __tsan { + +ScopedInRtl::ScopedInRtl() { +} + +ScopedInRtl::~ScopedInRtl() { +} + +uptr GetShadowMemoryConsumption() { + return 0; +} + +void FlushShadowMemory() { +} + +void InitializeShadowMemory() { + uptr shadow = (uptr)MmapFixedNoReserve(kLinuxShadowBeg, + kLinuxShadowEnd - kLinuxShadowBeg); + if (shadow != kLinuxShadowBeg) { + TsanPrintf("FATAL: ThreadSanitizer can not mmap the shadow memory\n"); + TsanPrintf("FATAL: Make sure to compile with -fPIE and " + "to link with -pie.\n"); + Die(); + } + DPrintf("kLinuxShadow %zx-%zx (%zuGB)\n", + kLinuxShadowBeg, kLinuxShadowEnd, + (kLinuxShadowEnd - kLinuxShadowBeg) >> 30); + DPrintf("kLinuxAppMem %zx-%zx (%zuGB)\n", + kLinuxAppMemBeg, kLinuxAppMemEnd, + (kLinuxAppMemEnd - kLinuxAppMemBeg) >> 30); +} + +const char *InitializePlatform() { + void *p = 0; + if (sizeof(p) == 8) { + // Disable core dumps, dumping of 16TB usually takes a bit long. + // The following magic is to prevent clang from replacing it with memset. + volatile rlimit lim; + lim.rlim_cur = 0; + lim.rlim_max = 0; + setrlimit(RLIMIT_CORE, (rlimit*)&lim); + } + + return getenv("TSAN_OPTIONS"); +} + +void FinalizePlatform() { + fflush(0); +} + +uptr GetTlsSize() { + return 0; +} + +void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size, + uptr *tls_addr, uptr *tls_size) { + *stk_addr = 0; + *stk_size = 0; + *tls_addr = 0; + *tls_size = 0; +} + +} // namespace __tsan + +#endif // #ifdef __APPLE__ diff --git a/libsanitizer/tsan/tsan_printf.cc b/libsanitizer/tsan/tsan_printf.cc new file mode 100644 index 0000000..982e292 --- /dev/null +++ b/libsanitizer/tsan/tsan_printf.cc @@ -0,0 +1,38 @@ +//===-- tsan_printf.cc ----------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "tsan_defs.h" +#include "tsan_mman.h" +#include "tsan_platform.h" + +#include <stdarg.h> // va_list + +namespace __sanitizer { +int VSNPrintf(char *buff, int buff_length, const char *format, va_list args); +} // namespace __sanitizer + +namespace __tsan { + +void TsanPrintf(const char *format, ...) { + ScopedInRtl in_rtl; + const uptr kMaxLen = 16 * 1024; + InternalScopedBuffer<char> buffer(kMaxLen); + va_list args; + va_start(args, format); + uptr len = VSNPrintf(buffer.data(), buffer.size(), format, args); + va_end(args); + internal_write(CTX() ? flags()->log_fileno : 2, + buffer.data(), len < buffer.size() ? len : buffer.size() - 1); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_report.cc b/libsanitizer/tsan/tsan_report.cc new file mode 100644 index 0000000..716a20f --- /dev/null +++ b/libsanitizer/tsan/tsan_report.cc @@ -0,0 +1,183 @@ +//===-- tsan_report.cc ----------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "tsan_report.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" + +namespace __tsan { + +ReportDesc::ReportDesc() + : stacks(MBlockReportStack) + , mops(MBlockReportMop) + , locs(MBlockReportLoc) + , mutexes(MBlockReportMutex) + , threads(MBlockReportThread) + , sleep() { +} + +ReportDesc::~ReportDesc() { +} + +#ifndef TSAN_GO + +static void PrintHeader(ReportType typ) { + TsanPrintf("WARNING: ThreadSanitizer: "); + + if (typ == ReportTypeRace) + TsanPrintf("data race"); + else if (typ == ReportTypeUseAfterFree) + TsanPrintf("heap-use-after-free"); + else if (typ == ReportTypeThreadLeak) + TsanPrintf("thread leak"); + else if (typ == ReportTypeMutexDestroyLocked) + TsanPrintf("destroy of a locked mutex"); + else if (typ == ReportTypeSignalUnsafe) + TsanPrintf("signal-unsafe call inside of a signal"); + else if (typ == ReportTypeErrnoInSignal) + TsanPrintf("signal handler spoils errno"); + + TsanPrintf(" (pid=%d)\n", GetPid()); +} + +void PrintStack(const ReportStack *ent) { + for (int i = 0; ent; ent = ent->next, i++) { + TsanPrintf(" #%d %s %s:%d", i, ent->func, ent->file, ent->line); + if (ent->col) + TsanPrintf(":%d", ent->col); + if (ent->module && ent->offset) + TsanPrintf(" (%s+%p)\n", ent->module, (void*)ent->offset); + else + TsanPrintf(" (%p)\n", (void*)ent->pc); + } + TsanPrintf("\n"); +} + +static void PrintMop(const ReportMop *mop, bool first) { + TsanPrintf(" %s of size %d at %p", + (first ? (mop->write ? "Write" : "Read") + : (mop->write ? "Previous write" : "Previous read")), + mop->size, (void*)mop->addr); + if (mop->tid == 0) + TsanPrintf(" by main thread:\n"); + else + TsanPrintf(" by thread %d:\n", mop->tid); + PrintStack(mop->stack); +} + +static void PrintLocation(const ReportLocation *loc) { + if (loc->type == ReportLocationGlobal) { + TsanPrintf(" Location is global '%s' of size %zu at %zx %s:%d\n", + loc->name, loc->size, loc->addr, loc->file, loc->line); + } else if (loc->type == ReportLocationHeap) { + TsanPrintf(" Location is heap block of size %zu at %p allocated", + loc->size, loc->addr); + if (loc->tid == 0) + TsanPrintf(" by main thread:\n"); + else + TsanPrintf(" by thread %d:\n", loc->tid); + PrintStack(loc->stack); + } else if (loc->type == ReportLocationStack) { + TsanPrintf(" Location is stack of thread %d:\n", loc->tid); + } +} + +static void PrintMutex(const ReportMutex *rm) { + if (rm->stack == 0) + return; + TsanPrintf(" Mutex %d created at:\n", rm->id); + PrintStack(rm->stack); +} + +static void PrintThread(const ReportThread *rt) { + if (rt->id == 0) // Little sense in describing the main thread. + return; + TsanPrintf(" Thread %d", rt->id); + if (rt->name) + TsanPrintf(" '%s'", rt->name); + TsanPrintf(" (tid=%zu, %s)", rt->pid, rt->running ? "running" : "finished"); + if (rt->stack) + TsanPrintf(" created at:"); + TsanPrintf("\n"); + PrintStack(rt->stack); +} + +static void PrintSleep(const ReportStack *s) { + TsanPrintf(" As if synchronized via sleep:\n"); + PrintStack(s); +} + +void PrintReport(const ReportDesc *rep) { + TsanPrintf("==================\n"); + PrintHeader(rep->typ); + + for (uptr i = 0; i < rep->stacks.Size(); i++) { + if (i) + TsanPrintf(" and:\n"); + PrintStack(rep->stacks[i]); + } + + for (uptr i = 0; i < rep->mops.Size(); i++) + PrintMop(rep->mops[i], i == 0); + + if (rep->sleep) + PrintSleep(rep->sleep); + + for (uptr i = 0; i < rep->locs.Size(); i++) + PrintLocation(rep->locs[i]); + + for (uptr i = 0; i < rep->mutexes.Size(); i++) + PrintMutex(rep->mutexes[i]); + + for (uptr i = 0; i < rep->threads.Size(); i++) + PrintThread(rep->threads[i]); + + TsanPrintf("==================\n"); +} + +#else + +void PrintStack(const ReportStack *ent) { + for (int i = 0; ent; ent = ent->next, i++) { + TsanPrintf(" %s()\n %s:%d +0x%zx\n", + ent->func, ent->file, ent->line, (void*)ent->offset); + } + TsanPrintf("\n"); +} + +static void PrintMop(const ReportMop *mop, bool first) { + TsanPrintf("%s by goroutine %d:\n", + (first ? (mop->write ? "Write" : "Read") + : (mop->write ? "Previous write" : "Previous read")), + mop->tid); + PrintStack(mop->stack); +} + +static void PrintThread(const ReportThread *rt) { + if (rt->id == 0) // Little sense in describing the main thread. + return; + TsanPrintf("Goroutine %d (%s) created at:\n", + rt->id, rt->running ? "running" : "finished"); + PrintStack(rt->stack); +} + +void PrintReport(const ReportDesc *rep) { + TsanPrintf("==================\n"); + TsanPrintf("WARNING: DATA RACE\n"); + for (uptr i = 0; i < rep->mops.Size(); i++) + PrintMop(rep->mops[i], i == 0); + for (uptr i = 0; i < rep->threads.Size(); i++) + PrintThread(rep->threads[i]); + TsanPrintf("==================\n"); +} + +#endif + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_report.h b/libsanitizer/tsan/tsan_report.h new file mode 100644 index 0000000..9972829 --- /dev/null +++ b/libsanitizer/tsan/tsan_report.h @@ -0,0 +1,103 @@ +//===-- tsan_report.h -------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_REPORT_H +#define TSAN_REPORT_H + +#include "tsan_defs.h" +#include "tsan_vector.h" + +namespace __tsan { + +enum ReportType { + ReportTypeRace, + ReportTypeUseAfterFree, + ReportTypeThreadLeak, + ReportTypeMutexDestroyLocked, + ReportTypeSignalUnsafe, + ReportTypeErrnoInSignal +}; + +struct ReportStack { + ReportStack *next; + char *module; + uptr offset; + uptr pc; + char *func; + char *file; + int line; + int col; +}; + +struct ReportMop { + int tid; + uptr addr; + int size; + bool write; + int nmutex; + int *mutex; + ReportStack *stack; +}; + +enum ReportLocationType { + ReportLocationGlobal, + ReportLocationHeap, + ReportLocationStack +}; + +struct ReportLocation { + ReportLocationType type; + uptr addr; + uptr size; + int tid; + char *name; + char *file; + int line; + ReportStack *stack; +}; + +struct ReportThread { + int id; + uptr pid; + bool running; + char *name; + ReportStack *stack; +}; + +struct ReportMutex { + int id; + ReportStack *stack; +}; + +class ReportDesc { + public: + ReportType typ; + Vector<ReportStack*> stacks; + Vector<ReportMop*> mops; + Vector<ReportLocation*> locs; + Vector<ReportMutex*> mutexes; + Vector<ReportThread*> threads; + ReportStack *sleep; + + ReportDesc(); + ~ReportDesc(); + + private: + ReportDesc(const ReportDesc&); + void operator = (const ReportDesc&); +}; + +// Format and output the report to the console/log. No additional logic. +void PrintReport(const ReportDesc *rep); +void PrintStack(const ReportStack *stack); + +} // namespace __tsan + +#endif // TSAN_REPORT_H diff --git a/libsanitizer/tsan/tsan_rtl.cc b/libsanitizer/tsan/tsan_rtl.cc new file mode 100644 index 0000000..4ff2697 --- /dev/null +++ b/libsanitizer/tsan/tsan_rtl.cc @@ -0,0 +1,578 @@ +//===-- tsan_rtl.cc -------------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Main file (entry points) for the TSan run-time. +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_atomic.h" +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_stackdepot.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "sanitizer_common/sanitizer_symbolizer.h" +#include "tsan_defs.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" +#include "tsan_mman.h" +#include "tsan_suppressions.h" + +volatile int __tsan_resumed = 0; + +extern "C" void __tsan_resume() { + __tsan_resumed = 1; +} + +namespace __tsan { + +#ifndef TSAN_GO +THREADLOCAL char cur_thread_placeholder[sizeof(ThreadState)] ALIGNED(64); +#endif +static char ctx_placeholder[sizeof(Context)] ALIGNED(64); + +static Context *ctx; +Context *CTX() { + return ctx; +} + +Context::Context() + : initialized() + , report_mtx(MutexTypeReport, StatMtxReport) + , nreported() + , nmissed_expected() + , thread_mtx(MutexTypeThreads, StatMtxThreads) + , racy_stacks(MBlockRacyStacks) + , racy_addresses(MBlockRacyAddresses) + , fired_suppressions(MBlockRacyAddresses) { +} + +// The objects are allocated in TLS, so one may rely on zero-initialization. +ThreadState::ThreadState(Context *ctx, int tid, int unique_id, u64 epoch, + uptr stk_addr, uptr stk_size, + uptr tls_addr, uptr tls_size) + : fast_state(tid, epoch) + // Do not touch these, rely on zero initialization, + // they may be accessed before the ctor. + // , fast_ignore_reads() + // , fast_ignore_writes() + // , in_rtl() + , shadow_stack_pos(&shadow_stack[0]) + , tid(tid) + , unique_id(unique_id) + , stk_addr(stk_addr) + , stk_size(stk_size) + , tls_addr(tls_addr) + , tls_size(tls_size) { +} + +ThreadContext::ThreadContext(int tid) + : tid(tid) + , unique_id() + , os_id() + , user_id() + , thr() + , status(ThreadStatusInvalid) + , detached() + , reuse_count() + , epoch0() + , epoch1() + , dead_info() + , dead_next() { +} + +static void WriteMemoryProfile(char *buf, uptr buf_size, int num) { + uptr shadow = GetShadowMemoryConsumption(); + + int nthread = 0; + int nlivethread = 0; + uptr threadmem = 0; + { + Lock l(&ctx->thread_mtx); + for (unsigned i = 0; i < kMaxTid; i++) { + ThreadContext *tctx = ctx->threads[i]; + if (tctx == 0) + continue; + nthread += 1; + threadmem += sizeof(ThreadContext); + if (tctx->status != ThreadStatusRunning) + continue; + nlivethread += 1; + threadmem += sizeof(ThreadState); + } + } + + uptr nsync = 0; + uptr syncmem = CTX()->synctab.GetMemoryConsumption(&nsync); + + internal_snprintf(buf, buf_size, "%d: shadow=%zuMB" + " thread=%zuMB(total=%d/live=%d)" + " sync=%zuMB(cnt=%zu)\n", + num, + shadow >> 20, + threadmem >> 20, nthread, nlivethread, + syncmem >> 20, nsync); +} + +static void MemoryProfileThread(void *arg) { + ScopedInRtl in_rtl; + fd_t fd = (fd_t)(uptr)arg; + for (int i = 0; ; i++) { + InternalScopedBuffer<char> buf(4096); + WriteMemoryProfile(buf.data(), buf.size(), i); + internal_write(fd, buf.data(), internal_strlen(buf.data())); + SleepForSeconds(1); + } +} + +static void InitializeMemoryProfile() { + if (flags()->profile_memory == 0 || flags()->profile_memory[0] == 0) + return; + InternalScopedBuffer<char> filename(4096); + internal_snprintf(filename.data(), filename.size(), "%s.%d", + flags()->profile_memory, GetPid()); + fd_t fd = internal_open(filename.data(), true); + if (fd == kInvalidFd) { + TsanPrintf("Failed to open memory profile file '%s'\n", &filename[0]); + Die(); + } + internal_start_thread(&MemoryProfileThread, (void*)(uptr)fd); +} + +static void MemoryFlushThread(void *arg) { + ScopedInRtl in_rtl; + for (int i = 0; ; i++) { + SleepForMillis(flags()->flush_memory_ms); + FlushShadowMemory(); + } +} + +static void InitializeMemoryFlush() { + if (flags()->flush_memory_ms == 0) + return; + if (flags()->flush_memory_ms < 100) + flags()->flush_memory_ms = 100; + internal_start_thread(&MemoryFlushThread, 0); +} + +void Initialize(ThreadState *thr) { + // Thread safe because done before all threads exist. + static bool is_initialized = false; + if (is_initialized) + return; + is_initialized = true; + // Install tool-specific callbacks in sanitizer_common. + SetCheckFailedCallback(TsanCheckFailed); + + ScopedInRtl in_rtl; +#ifndef TSAN_GO + InitializeAllocator(); +#endif + InitializeInterceptors(); + const char *env = InitializePlatform(); + InitializeMutex(); + InitializeDynamicAnnotations(); + ctx = new(ctx_placeholder) Context; + InitializeShadowMemory(); + ctx->dead_list_size = 0; + ctx->dead_list_head = 0; + ctx->dead_list_tail = 0; + InitializeFlags(&ctx->flags, env); + InitializeSuppressions(); +#ifndef TSAN_GO + // Initialize external symbolizer before internal threads are started. + const char *external_symbolizer = flags()->external_symbolizer_path; + if (external_symbolizer != 0 && external_symbolizer[0] != '\0') { + InitializeExternalSymbolizer(external_symbolizer); + } +#endif + InitializeMemoryProfile(); + InitializeMemoryFlush(); + + if (ctx->flags.verbosity) + TsanPrintf("***** Running under ThreadSanitizer v2 (pid %d) *****\n", + GetPid()); + + // Initialize thread 0. + ctx->thread_seq = 0; + int tid = ThreadCreate(thr, 0, 0, true); + CHECK_EQ(tid, 0); + ThreadStart(thr, tid, GetPid()); + CHECK_EQ(thr->in_rtl, 1); + ctx->initialized = true; + + if (flags()->stop_on_start) { + TsanPrintf("ThreadSanitizer is suspended at startup (pid %d)." + " Call __tsan_resume().\n", + GetPid()); + while (__tsan_resumed == 0); + } +} + +int Finalize(ThreadState *thr) { + ScopedInRtl in_rtl; + Context *ctx = __tsan::ctx; + bool failed = false; + + // Wait for pending reports. + ctx->report_mtx.Lock(); + ctx->report_mtx.Unlock(); + + ThreadFinalize(thr); + + if (ctx->nreported) { + failed = true; + TsanPrintf("ThreadSanitizer: reported %d warnings\n", ctx->nreported); + } + + if (ctx->nmissed_expected) { + failed = true; + TsanPrintf("ThreadSanitizer: missed %d expected races\n", + ctx->nmissed_expected); + } + + StatOutput(ctx->stat); + return failed ? flags()->exitcode : 0; +} + +#ifndef TSAN_GO +u32 CurrentStackId(ThreadState *thr, uptr pc) { + if (thr->shadow_stack_pos == 0) // May happen during bootstrap. + return 0; + if (pc) { + thr->shadow_stack_pos[0] = pc; + thr->shadow_stack_pos++; + } + u32 id = StackDepotPut(thr->shadow_stack, + thr->shadow_stack_pos - thr->shadow_stack); + if (pc) + thr->shadow_stack_pos--; + return id; +} +#endif + +void TraceSwitch(ThreadState *thr) { + thr->nomalloc++; + ScopedInRtl in_rtl; + Lock l(&thr->trace.mtx); + unsigned trace = (thr->fast_state.epoch() / kTracePartSize) % kTraceParts; + TraceHeader *hdr = &thr->trace.headers[trace]; + hdr->epoch0 = thr->fast_state.epoch(); + hdr->stack0.ObtainCurrent(thr, 0); + thr->nomalloc--; +} + +#ifndef TSAN_GO +extern "C" void __tsan_trace_switch() { + TraceSwitch(cur_thread()); +} + +extern "C" void __tsan_report_race() { + ReportRace(cur_thread()); +} +#endif + +ALWAYS_INLINE +static Shadow LoadShadow(u64 *p) { + u64 raw = atomic_load((atomic_uint64_t*)p, memory_order_relaxed); + return Shadow(raw); +} + +ALWAYS_INLINE +static void StoreShadow(u64 *sp, u64 s) { + atomic_store((atomic_uint64_t*)sp, s, memory_order_relaxed); +} + +ALWAYS_INLINE +static void StoreIfNotYetStored(u64 *sp, u64 *s) { + StoreShadow(sp, *s); + *s = 0; +} + +static inline void HandleRace(ThreadState *thr, u64 *shadow_mem, + Shadow cur, Shadow old) { + thr->racy_state[0] = cur.raw(); + thr->racy_state[1] = old.raw(); + thr->racy_shadow_addr = shadow_mem; + ReportRace(thr); +} + +static inline bool BothReads(Shadow s, int kAccessIsWrite) { + return !kAccessIsWrite && !s.is_write(); +} + +static inline bool OldIsRWStronger(Shadow old, int kAccessIsWrite) { + return old.is_write() || !kAccessIsWrite; +} + +static inline bool OldIsRWWeaker(Shadow old, int kAccessIsWrite) { + return !old.is_write() || kAccessIsWrite; +} + +static inline bool OldIsInSameSynchEpoch(Shadow old, ThreadState *thr) { + return old.epoch() >= thr->fast_synch_epoch; +} + +static inline bool HappensBefore(Shadow old, ThreadState *thr) { + return thr->clock.get(old.tid()) >= old.epoch(); +} + +ALWAYS_INLINE +void MemoryAccessImpl(ThreadState *thr, uptr addr, + int kAccessSizeLog, bool kAccessIsWrite, FastState fast_state, + u64 *shadow_mem, Shadow cur) { + StatInc(thr, StatMop); + StatInc(thr, kAccessIsWrite ? StatMopWrite : StatMopRead); + StatInc(thr, (StatType)(StatMop1 + kAccessSizeLog)); + + // This potentially can live in an MMX/SSE scratch register. + // The required intrinsics are: + // __m128i _mm_move_epi64(__m128i*); + // _mm_storel_epi64(u64*, __m128i); + u64 store_word = cur.raw(); + + // scan all the shadow values and dispatch to 4 categories: + // same, replace, candidate and race (see comments below). + // we consider only 3 cases regarding access sizes: + // equal, intersect and not intersect. initially I considered + // larger and smaller as well, it allowed to replace some + // 'candidates' with 'same' or 'replace', but I think + // it's just not worth it (performance- and complexity-wise). + + Shadow old(0); + if (kShadowCnt == 1) { + int idx = 0; +#include "tsan_update_shadow_word_inl.h" + } else if (kShadowCnt == 2) { + int idx = 0; +#include "tsan_update_shadow_word_inl.h" + idx = 1; +#include "tsan_update_shadow_word_inl.h" + } else if (kShadowCnt == 4) { + int idx = 0; +#include "tsan_update_shadow_word_inl.h" + idx = 1; +#include "tsan_update_shadow_word_inl.h" + idx = 2; +#include "tsan_update_shadow_word_inl.h" + idx = 3; +#include "tsan_update_shadow_word_inl.h" + } else if (kShadowCnt == 8) { + int idx = 0; +#include "tsan_update_shadow_word_inl.h" + idx = 1; +#include "tsan_update_shadow_word_inl.h" + idx = 2; +#include "tsan_update_shadow_word_inl.h" + idx = 3; +#include "tsan_update_shadow_word_inl.h" + idx = 4; +#include "tsan_update_shadow_word_inl.h" + idx = 5; +#include "tsan_update_shadow_word_inl.h" + idx = 6; +#include "tsan_update_shadow_word_inl.h" + idx = 7; +#include "tsan_update_shadow_word_inl.h" + } else { + CHECK(false); + } + + // we did not find any races and had already stored + // the current access info, so we are done + if (LIKELY(store_word == 0)) + return; + // choose a random candidate slot and replace it + StoreShadow(shadow_mem + (cur.epoch() % kShadowCnt), store_word); + StatInc(thr, StatShadowReplace); + return; + RACE: + HandleRace(thr, shadow_mem, cur, old); + return; +} + +ALWAYS_INLINE +void MemoryAccess(ThreadState *thr, uptr pc, uptr addr, + int kAccessSizeLog, bool kAccessIsWrite) { + u64 *shadow_mem = (u64*)MemToShadow(addr); + DPrintf2("#%d: tsan::OnMemoryAccess: @%p %p size=%d" + " is_write=%d shadow_mem=%p {%zx, %zx, %zx, %zx}\n", + (int)thr->fast_state.tid(), (void*)pc, (void*)addr, + (int)(1 << kAccessSizeLog), kAccessIsWrite, shadow_mem, + (uptr)shadow_mem[0], (uptr)shadow_mem[1], + (uptr)shadow_mem[2], (uptr)shadow_mem[3]); +#if TSAN_DEBUG + if (!IsAppMem(addr)) { + TsanPrintf("Access to non app mem %zx\n", addr); + DCHECK(IsAppMem(addr)); + } + if (!IsShadowMem((uptr)shadow_mem)) { + TsanPrintf("Bad shadow addr %p (%zx)\n", shadow_mem, addr); + DCHECK(IsShadowMem((uptr)shadow_mem)); + } +#endif + + FastState fast_state = thr->fast_state; + if (fast_state.GetIgnoreBit()) + return; + fast_state.IncrementEpoch(); + thr->fast_state = fast_state; + Shadow cur(fast_state); + cur.SetAddr0AndSizeLog(addr & 7, kAccessSizeLog); + cur.SetWrite(kAccessIsWrite); + + // We must not store to the trace if we do not store to the shadow. + // That is, this call must be moved somewhere below. + TraceAddEvent(thr, fast_state.epoch(), EventTypeMop, pc); + + MemoryAccessImpl(thr, addr, kAccessSizeLog, kAccessIsWrite, fast_state, + shadow_mem, cur); +} + +static void MemoryRangeSet(ThreadState *thr, uptr pc, uptr addr, uptr size, + u64 val) { + if (size == 0) + return; + // FIXME: fix me. + uptr offset = addr % kShadowCell; + if (offset) { + offset = kShadowCell - offset; + if (size <= offset) + return; + addr += offset; + size -= offset; + } + DCHECK_EQ(addr % 8, 0); + // If a user passes some insane arguments (memset(0)), + // let it just crash as usual. + if (!IsAppMem(addr) || !IsAppMem(addr + size - 1)) + return; + (void)thr; + (void)pc; + // Some programs mmap like hundreds of GBs but actually used a small part. + // So, it's better to report a false positive on the memory + // then to hang here senselessly. + const uptr kMaxResetSize = 4ull*1024*1024*1024; + if (size > kMaxResetSize) + size = kMaxResetSize; + size = (size + (kShadowCell - 1)) & ~(kShadowCell - 1); + u64 *p = (u64*)MemToShadow(addr); + CHECK(IsShadowMem((uptr)p)); + CHECK(IsShadowMem((uptr)(p + size * kShadowCnt / kShadowCell - 1))); + // FIXME: may overwrite a part outside the region + for (uptr i = 0; i < size * kShadowCnt / kShadowCell;) { + p[i++] = val; + for (uptr j = 1; j < kShadowCnt; j++) + p[i++] = 0; + } +} + +void MemoryResetRange(ThreadState *thr, uptr pc, uptr addr, uptr size) { + MemoryRangeSet(thr, pc, addr, size, 0); +} + +void MemoryRangeFreed(ThreadState *thr, uptr pc, uptr addr, uptr size) { + MemoryAccessRange(thr, pc, addr, size, true); + Shadow s(thr->fast_state); + s.MarkAsFreed(); + s.SetWrite(true); + s.SetAddr0AndSizeLog(0, 3); + MemoryRangeSet(thr, pc, addr, size, s.raw()); +} + +void MemoryRangeImitateWrite(ThreadState *thr, uptr pc, uptr addr, uptr size) { + Shadow s(thr->fast_state); + s.SetWrite(true); + s.SetAddr0AndSizeLog(0, 3); + MemoryRangeSet(thr, pc, addr, size, s.raw()); +} + +void FuncEntry(ThreadState *thr, uptr pc) { + DCHECK_EQ(thr->in_rtl, 0); + StatInc(thr, StatFuncEnter); + DPrintf2("#%d: FuncEntry %p\n", (int)thr->fast_state.tid(), (void*)pc); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeFuncEnter, pc); + + // Shadow stack maintenance can be replaced with + // stack unwinding during trace switch (which presumably must be faster). + DCHECK_GE(thr->shadow_stack_pos, &thr->shadow_stack[0]); +#ifndef TSAN_GO + DCHECK_LT(thr->shadow_stack_pos, &thr->shadow_stack[kShadowStackSize]); +#else + if (thr->shadow_stack_pos == thr->shadow_stack_end) { + const int sz = thr->shadow_stack_end - thr->shadow_stack; + const int newsz = 2 * sz; + uptr *newstack = (uptr*)internal_alloc(MBlockShadowStack, + newsz * sizeof(uptr)); + internal_memcpy(newstack, thr->shadow_stack, sz * sizeof(uptr)); + internal_free(thr->shadow_stack); + thr->shadow_stack = newstack; + thr->shadow_stack_pos = newstack + sz; + thr->shadow_stack_end = newstack + newsz; + } +#endif + thr->shadow_stack_pos[0] = pc; + thr->shadow_stack_pos++; +} + +void FuncExit(ThreadState *thr) { + DCHECK_EQ(thr->in_rtl, 0); + StatInc(thr, StatFuncExit); + DPrintf2("#%d: FuncExit\n", (int)thr->fast_state.tid()); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeFuncExit, 0); + + DCHECK_GT(thr->shadow_stack_pos, &thr->shadow_stack[0]); +#ifndef TSAN_GO + DCHECK_LT(thr->shadow_stack_pos, &thr->shadow_stack[kShadowStackSize]); +#endif + thr->shadow_stack_pos--; +} + +void IgnoreCtl(ThreadState *thr, bool write, bool begin) { + DPrintf("#%d: IgnoreCtl(%d, %d)\n", thr->tid, write, begin); + thr->ignore_reads_and_writes += begin ? 1 : -1; + CHECK_GE(thr->ignore_reads_and_writes, 0); + if (thr->ignore_reads_and_writes) + thr->fast_state.SetIgnoreBit(); + else + thr->fast_state.ClearIgnoreBit(); +} + +bool MD5Hash::operator==(const MD5Hash &other) const { + return hash[0] == other.hash[0] && hash[1] == other.hash[1]; +} + +#if TSAN_DEBUG +void build_consistency_debug() {} +#else +void build_consistency_release() {} +#endif + +#if TSAN_COLLECT_STATS +void build_consistency_stats() {} +#else +void build_consistency_nostats() {} +#endif + +#if TSAN_SHADOW_COUNT == 1 +void build_consistency_shadow1() {} +#elif TSAN_SHADOW_COUNT == 2 +void build_consistency_shadow2() {} +#elif TSAN_SHADOW_COUNT == 4 +void build_consistency_shadow4() {} +#else +void build_consistency_shadow8() {} +#endif + +} // namespace __tsan + +#ifndef TSAN_GO +// Must be included in this file to make sure everything is inlined. +#include "tsan_interface_inl.h" +#endif diff --git a/libsanitizer/tsan/tsan_rtl.h b/libsanitizer/tsan/tsan_rtl.h new file mode 100644 index 0000000..3df229c --- /dev/null +++ b/libsanitizer/tsan/tsan_rtl.h @@ -0,0 +1,554 @@ +//===-- tsan_rtl.h ----------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Main internal TSan header file. +// +// Ground rules: +// - C++ run-time should not be used (static CTORs, RTTI, exceptions, static +// function-scope locals) +// - All functions/classes/etc reside in namespace __tsan, except for those +// declared in tsan_interface.h. +// - Platform-specific files should be used instead of ifdefs (*). +// - No system headers included in header files (*). +// - Platform specific headres included only into platform-specific files (*). +// +// (*) Except when inlining is critical for performance. +//===----------------------------------------------------------------------===// + +#ifndef TSAN_RTL_H +#define TSAN_RTL_H + +#include "sanitizer_common/sanitizer_common.h" +#if __WORDSIZE == 64 +#include "sanitizer_common/sanitizer_allocator64.h" +#else +#include "sanitizer_common/sanitizer_allocator.h" +#endif +#include "tsan_clock.h" +#include "tsan_defs.h" +#include "tsan_flags.h" +#include "tsan_sync.h" +#include "tsan_trace.h" +#include "tsan_vector.h" +#include "tsan_report.h" + +namespace __tsan { + +// Descriptor of user's memory block. +struct MBlock { + Mutex mtx; + uptr size; + u32 alloc_tid; + u32 alloc_stack_id; + SyncVar *head; +}; + +#ifndef TSAN_GO +#if defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW +const uptr kAllocatorSpace = 0x7d0000000000ULL; +#else +const uptr kAllocatorSpace = 0x7d0000000000ULL; +#endif +const uptr kAllocatorSize = 0x10000000000ULL; // 1T. + +typedef SizeClassAllocator64<kAllocatorSpace, kAllocatorSize, sizeof(MBlock), + DefaultSizeClassMap> PrimaryAllocator; +typedef SizeClassAllocatorLocalCache<PrimaryAllocator::kNumClasses, + PrimaryAllocator> AllocatorCache; +typedef LargeMmapAllocator SecondaryAllocator; +typedef CombinedAllocator<PrimaryAllocator, AllocatorCache, + SecondaryAllocator> Allocator; +Allocator *allocator(); +#endif + +void TsanCheckFailed(const char *file, int line, const char *cond, + u64 v1, u64 v2); +void TsanPrintf(const char *format, ...); + +// FastState (from most significant bit): +// unused : 1 +// tid : kTidBits +// epoch : kClkBits +// unused : - +// ignore_bit : 1 +class FastState { + public: + FastState(u64 tid, u64 epoch) { + x_ = tid << kTidShift; + x_ |= epoch << kClkShift; + DCHECK(tid == this->tid()); + DCHECK(epoch == this->epoch()); + } + + explicit FastState(u64 x) + : x_(x) { + } + + u64 raw() const { + return x_; + } + + u64 tid() const { + u64 res = x_ >> kTidShift; + return res; + } + + u64 epoch() const { + u64 res = (x_ << (kTidBits + 1)) >> (64 - kClkBits); + return res; + } + + void IncrementEpoch() { + u64 old_epoch = epoch(); + x_ += 1 << kClkShift; + DCHECK_EQ(old_epoch + 1, epoch()); + (void)old_epoch; + } + + void SetIgnoreBit() { x_ |= kIgnoreBit; } + void ClearIgnoreBit() { x_ &= ~kIgnoreBit; } + bool GetIgnoreBit() const { return x_ & kIgnoreBit; } + + private: + friend class Shadow; + static const int kTidShift = 64 - kTidBits - 1; + static const int kClkShift = kTidShift - kClkBits; + static const u64 kIgnoreBit = 1ull; + static const u64 kFreedBit = 1ull << 63; + u64 x_; +}; + +// Shadow (from most significant bit): +// freed : 1 +// tid : kTidBits +// epoch : kClkBits +// is_write : 1 +// size_log : 2 +// addr0 : 3 +class Shadow : public FastState { + public: + explicit Shadow(u64 x) : FastState(x) { } + + explicit Shadow(const FastState &s) : FastState(s.x_) { } + + void SetAddr0AndSizeLog(u64 addr0, unsigned kAccessSizeLog) { + DCHECK_EQ(x_ & 31, 0); + DCHECK_LE(addr0, 7); + DCHECK_LE(kAccessSizeLog, 3); + x_ |= (kAccessSizeLog << 3) | addr0; + DCHECK_EQ(kAccessSizeLog, size_log()); + DCHECK_EQ(addr0, this->addr0()); + } + + void SetWrite(unsigned kAccessIsWrite) { + DCHECK_EQ(x_ & 32, 0); + if (kAccessIsWrite) + x_ |= 32; + DCHECK_EQ(kAccessIsWrite, is_write()); + } + + bool IsZero() const { return x_ == 0; } + + static inline bool TidsAreEqual(const Shadow s1, const Shadow s2) { + u64 shifted_xor = (s1.x_ ^ s2.x_) >> kTidShift; + DCHECK_EQ(shifted_xor == 0, s1.tid() == s2.tid()); + return shifted_xor == 0; + } + + static inline bool Addr0AndSizeAreEqual(const Shadow s1, const Shadow s2) { + u64 masked_xor = (s1.x_ ^ s2.x_) & 31; + return masked_xor == 0; + } + + static inline bool TwoRangesIntersect(Shadow s1, Shadow s2, + unsigned kS2AccessSize) { + bool res = false; + u64 diff = s1.addr0() - s2.addr0(); + if ((s64)diff < 0) { // s1.addr0 < s2.addr0 // NOLINT + // if (s1.addr0() + size1) > s2.addr0()) return true; + if (s1.size() > -diff) res = true; + } else { + // if (s2.addr0() + kS2AccessSize > s1.addr0()) return true; + if (kS2AccessSize > diff) res = true; + } + DCHECK_EQ(res, TwoRangesIntersectSLOW(s1, s2)); + DCHECK_EQ(res, TwoRangesIntersectSLOW(s2, s1)); + return res; + } + + // The idea behind the offset is as follows. + // Consider that we have 8 bool's contained within a single 8-byte block + // (mapped to a single shadow "cell"). Now consider that we write to the bools + // from a single thread (which we consider the common case). + // W/o offsetting each access will have to scan 4 shadow values at average + // to find the corresponding shadow value for the bool. + // With offsetting we start scanning shadow with the offset so that + // each access hits necessary shadow straight off (at least in an expected + // optimistic case). + // This logic works seamlessly for any layout of user data. For example, + // if user data is {int, short, char, char}, then accesses to the int are + // offsetted to 0, short - 4, 1st char - 6, 2nd char - 7. Hopefully, accesses + // from a single thread won't need to scan all 8 shadow values. + unsigned ComputeSearchOffset() { + return x_ & 7; + } + u64 addr0() const { return x_ & 7; } + u64 size() const { return 1ull << size_log(); } + bool is_write() const { return x_ & 32; } + + // The idea behind the freed bit is as follows. + // When the memory is freed (or otherwise unaccessible) we write to the shadow + // values with tid/epoch related to the free and the freed bit set. + // During memory accesses processing the freed bit is considered + // as msb of tid. So any access races with shadow with freed bit set + // (it is as if write from a thread with which we never synchronized before). + // This allows us to detect accesses to freed memory w/o additional + // overheads in memory access processing and at the same time restore + // tid/epoch of free. + void MarkAsFreed() { + x_ |= kFreedBit; + } + + bool GetFreedAndReset() { + bool res = x_ & kFreedBit; + x_ &= ~kFreedBit; + return res; + } + + private: + u64 size_log() const { return (x_ >> 3) & 3; } + + static bool TwoRangesIntersectSLOW(const Shadow s1, const Shadow s2) { + if (s1.addr0() == s2.addr0()) return true; + if (s1.addr0() < s2.addr0() && s1.addr0() + s1.size() > s2.addr0()) + return true; + if (s2.addr0() < s1.addr0() && s2.addr0() + s2.size() > s1.addr0()) + return true; + return false; + } +}; + +// Freed memory. +// As if 8-byte write by thread 0xff..f at epoch 0xff..f, races with everything. +const u64 kShadowFreed = 0xfffffffffffffff8ull; + +struct SignalContext; + +// This struct is stored in TLS. +struct ThreadState { + FastState fast_state; + // Synch epoch represents the threads's epoch before the last synchronization + // action. It allows to reduce number of shadow state updates. + // For example, fast_synch_epoch=100, last write to addr X was at epoch=150, + // if we are processing write to X from the same thread at epoch=200, + // we do nothing, because both writes happen in the same 'synch epoch'. + // That is, if another memory access does not race with the former write, + // it does not race with the latter as well. + // QUESTION: can we can squeeze this into ThreadState::Fast? + // E.g. ThreadState::Fast is a 44-bit, 32 are taken by synch_epoch and 12 are + // taken by epoch between synchs. + // This way we can save one load from tls. + u64 fast_synch_epoch; + // This is a slow path flag. On fast path, fast_state.GetIgnoreBit() is read. + // We do not distinguish beteween ignoring reads and writes + // for better performance. + int ignore_reads_and_writes; + uptr *shadow_stack_pos; + u64 *racy_shadow_addr; + u64 racy_state[2]; + Trace trace; +#ifndef TSAN_GO + // C/C++ uses embed shadow stack of fixed size. + uptr shadow_stack[kShadowStackSize]; +#else + // Go uses satellite shadow stack with dynamic size. + uptr *shadow_stack; + uptr *shadow_stack_end; +#endif + ThreadClock clock; +#ifndef TSAN_GO + AllocatorCache alloc_cache; +#endif + u64 stat[StatCnt]; + const int tid; + const int unique_id; + int in_rtl; + bool is_alive; + const uptr stk_addr; + const uptr stk_size; + const uptr tls_addr; + const uptr tls_size; + + DeadlockDetector deadlock_detector; + + bool in_signal_handler; + SignalContext *signal_ctx; + +#ifndef TSAN_GO + u32 last_sleep_stack_id; + ThreadClock last_sleep_clock; +#endif + + // Set in regions of runtime that must be signal-safe and fork-safe. + // If set, malloc must not be called. + int nomalloc; + + explicit ThreadState(Context *ctx, int tid, int unique_id, u64 epoch, + uptr stk_addr, uptr stk_size, + uptr tls_addr, uptr tls_size); +}; + +Context *CTX(); + +#ifndef TSAN_GO +extern THREADLOCAL char cur_thread_placeholder[]; +INLINE ThreadState *cur_thread() { + return reinterpret_cast<ThreadState *>(&cur_thread_placeholder); +} +#endif + +enum ThreadStatus { + ThreadStatusInvalid, // Non-existent thread, data is invalid. + ThreadStatusCreated, // Created but not yet running. + ThreadStatusRunning, // The thread is currently running. + ThreadStatusFinished, // Joinable thread is finished but not yet joined. + ThreadStatusDead // Joined, but some info (trace) is still alive. +}; + +// An info about a thread that is hold for some time after its termination. +struct ThreadDeadInfo { + Trace trace; +}; + +struct ThreadContext { + const int tid; + int unique_id; // Non-rolling thread id. + uptr os_id; // pid + uptr user_id; // Some opaque user thread id (e.g. pthread_t). + ThreadState *thr; + ThreadStatus status; + bool detached; + int reuse_count; + SyncClock sync; + // Epoch at which the thread had started. + // If we see an event from the thread stamped by an older epoch, + // the event is from a dead thread that shared tid with this thread. + u64 epoch0; + u64 epoch1; + StackTrace creation_stack; + ThreadDeadInfo *dead_info; + ThreadContext *dead_next; // In dead thread list. + + explicit ThreadContext(int tid); +}; + +struct RacyStacks { + MD5Hash hash[2]; + bool operator==(const RacyStacks &other) const { + if (hash[0] == other.hash[0] && hash[1] == other.hash[1]) + return true; + if (hash[0] == other.hash[1] && hash[1] == other.hash[0]) + return true; + return false; + } +}; + +struct RacyAddress { + uptr addr_min; + uptr addr_max; +}; + +struct FiredSuppression { + ReportType type; + uptr pc; +}; + +struct Context { + Context(); + + bool initialized; + + SyncTab synctab; + + Mutex report_mtx; + int nreported; + int nmissed_expected; + + Mutex thread_mtx; + unsigned thread_seq; + unsigned unique_thread_seq; + int alive_threads; + int max_alive_threads; + ThreadContext *threads[kMaxTid]; + int dead_list_size; + ThreadContext* dead_list_head; + ThreadContext* dead_list_tail; + + Vector<RacyStacks> racy_stacks; + Vector<RacyAddress> racy_addresses; + Vector<FiredSuppression> fired_suppressions; + + Flags flags; + + u64 stat[StatCnt]; + u64 int_alloc_cnt[MBlockTypeCount]; + u64 int_alloc_siz[MBlockTypeCount]; +}; + +class ScopedInRtl { + public: + ScopedInRtl(); + ~ScopedInRtl(); + private: + ThreadState*thr_; + int in_rtl_; + int errno_; +}; + +class ScopedReport { + public: + explicit ScopedReport(ReportType typ); + ~ScopedReport(); + + void AddStack(const StackTrace *stack); + void AddMemoryAccess(uptr addr, Shadow s, const StackTrace *stack); + void AddThread(const ThreadContext *tctx); + void AddMutex(const SyncVar *s); + void AddLocation(uptr addr, uptr size); + void AddSleep(u32 stack_id); + + const ReportDesc *GetReport() const; + + private: + Context *ctx_; + ReportDesc *rep_; + + ScopedReport(const ScopedReport&); + void operator = (const ScopedReport&); +}; + +void RestoreStack(int tid, const u64 epoch, StackTrace *stk); + +void StatAggregate(u64 *dst, u64 *src); +void StatOutput(u64 *stat); +void ALWAYS_INLINE INLINE StatInc(ThreadState *thr, StatType typ, u64 n = 1) { + if (kCollectStats) + thr->stat[typ] += n; +} + +void InitializeShadowMemory(); +void InitializeInterceptors(); +void InitializeDynamicAnnotations(); + +void ReportRace(ThreadState *thr); +bool OutputReport(Context *ctx, + const ScopedReport &srep, + const ReportStack *suppress_stack = 0); +bool IsFiredSuppression(Context *ctx, + const ScopedReport &srep, + const StackTrace &trace); +bool IsExpectedReport(uptr addr, uptr size); + +#if defined(TSAN_DEBUG_OUTPUT) && TSAN_DEBUG_OUTPUT >= 1 +# define DPrintf TsanPrintf +#else +# define DPrintf(...) +#endif + +#if defined(TSAN_DEBUG_OUTPUT) && TSAN_DEBUG_OUTPUT >= 2 +# define DPrintf2 TsanPrintf +#else +# define DPrintf2(...) +#endif + +u32 CurrentStackId(ThreadState *thr, uptr pc); +void PrintCurrentStack(ThreadState *thr, uptr pc); + +void Initialize(ThreadState *thr); +int Finalize(ThreadState *thr); + +void MemoryAccess(ThreadState *thr, uptr pc, uptr addr, + int kAccessSizeLog, bool kAccessIsWrite); +void MemoryAccessImpl(ThreadState *thr, uptr addr, + int kAccessSizeLog, bool kAccessIsWrite, FastState fast_state, + u64 *shadow_mem, Shadow cur); +void MemoryRead1Byte(ThreadState *thr, uptr pc, uptr addr); +void MemoryWrite1Byte(ThreadState *thr, uptr pc, uptr addr); +void MemoryRead8Byte(ThreadState *thr, uptr pc, uptr addr); +void MemoryWrite8Byte(ThreadState *thr, uptr pc, uptr addr); +void MemoryAccessRange(ThreadState *thr, uptr pc, uptr addr, + uptr size, bool is_write); +void MemoryResetRange(ThreadState *thr, uptr pc, uptr addr, uptr size); +void MemoryRangeFreed(ThreadState *thr, uptr pc, uptr addr, uptr size); +void MemoryRangeImitateWrite(ThreadState *thr, uptr pc, uptr addr, uptr size); +void IgnoreCtl(ThreadState *thr, bool write, bool begin); + +void FuncEntry(ThreadState *thr, uptr pc); +void FuncExit(ThreadState *thr); + +int ThreadCreate(ThreadState *thr, uptr pc, uptr uid, bool detached); +void ThreadStart(ThreadState *thr, int tid, uptr os_id); +void ThreadFinish(ThreadState *thr); +int ThreadTid(ThreadState *thr, uptr pc, uptr uid); +void ThreadJoin(ThreadState *thr, uptr pc, int tid); +void ThreadDetach(ThreadState *thr, uptr pc, int tid); +void ThreadFinalize(ThreadState *thr); +void ThreadFinalizerGoroutine(ThreadState *thr); + +void MutexCreate(ThreadState *thr, uptr pc, uptr addr, + bool rw, bool recursive, bool linker_init); +void MutexDestroy(ThreadState *thr, uptr pc, uptr addr); +void MutexLock(ThreadState *thr, uptr pc, uptr addr); +void MutexUnlock(ThreadState *thr, uptr pc, uptr addr); +void MutexReadLock(ThreadState *thr, uptr pc, uptr addr); +void MutexReadUnlock(ThreadState *thr, uptr pc, uptr addr); +void MutexReadOrWriteUnlock(ThreadState *thr, uptr pc, uptr addr); + +void Acquire(ThreadState *thr, uptr pc, uptr addr); +void Release(ThreadState *thr, uptr pc, uptr addr); +void ReleaseStore(ThreadState *thr, uptr pc, uptr addr); +void AfterSleep(ThreadState *thr, uptr pc); + +// The hacky call uses custom calling convention and an assembly thunk. +// It is considerably faster that a normal call for the caller +// if it is not executed (it is intended for slow paths from hot functions). +// The trick is that the call preserves all registers and the compiler +// does not treat it as a call. +// If it does not work for you, use normal call. +#if TSAN_DEBUG == 0 +// The caller may not create the stack frame for itself at all, +// so we create a reserve stack frame for it (1024b must be enough). +#define HACKY_CALL(f) \ + __asm__ __volatile__("sub $1024, %%rsp;" \ + "/*.cfi_adjust_cfa_offset 1024;*/" \ + "call " #f "_thunk;" \ + "add $1024, %%rsp;" \ + "/*.cfi_adjust_cfa_offset -1024;*/" \ + ::: "memory", "cc"); +#else +#define HACKY_CALL(f) f() +#endif + +void TraceSwitch(ThreadState *thr); + +extern "C" void __tsan_trace_switch(); +void ALWAYS_INLINE INLINE TraceAddEvent(ThreadState *thr, u64 epoch, + EventType typ, uptr addr) { + StatInc(thr, StatEvents); + if (UNLIKELY((epoch % kTracePartSize) == 0)) { + TraceSwitch(thr); + } + Event *evp = &thr->trace.events[epoch % kTraceSize]; + Event ev = (u64)addr | ((u64)typ << 61); + *evp = ev; +} + +} // namespace __tsan + +#endif // TSAN_RTL_H diff --git a/libsanitizer/tsan/tsan_rtl_amd64.S b/libsanitizer/tsan/tsan_rtl_amd64.S new file mode 100644 index 0000000..aee650d --- /dev/null +++ b/libsanitizer/tsan/tsan_rtl_amd64.S @@ -0,0 +1,164 @@ +.section .text + +.globl __tsan_trace_switch_thunk +__tsan_trace_switch_thunk: + .cfi_startproc + # Save scratch registers. + push %rax + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rax, 0 + push %rcx + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rcx, 0 + push %rdx + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rdx, 0 + push %rsi + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rsi, 0 + push %rdi + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rdi, 0 + push %r8 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r8, 0 + push %r9 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r9, 0 + push %r10 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r10, 0 + push %r11 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r11, 0 + # Align stack frame. + push %rbx # non-scratch + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rbx, 0 + mov %rsp, %rbx # save current rsp + .cfi_def_cfa_register %rbx + shr $4, %rsp # clear 4 lsb, align to 16 + shl $4, %rsp + + call __tsan_trace_switch + + # Unalign stack frame back. + mov %rbx, %rsp # restore the original rsp + .cfi_def_cfa_register %rsp + pop %rbx + .cfi_adjust_cfa_offset -8 + # Restore scratch registers. + pop %r11 + .cfi_adjust_cfa_offset -8 + pop %r10 + .cfi_adjust_cfa_offset -8 + pop %r9 + .cfi_adjust_cfa_offset -8 + pop %r8 + .cfi_adjust_cfa_offset -8 + pop %rdi + .cfi_adjust_cfa_offset -8 + pop %rsi + .cfi_adjust_cfa_offset -8 + pop %rdx + .cfi_adjust_cfa_offset -8 + pop %rcx + .cfi_adjust_cfa_offset -8 + pop %rax + .cfi_adjust_cfa_offset -8 + .cfi_restore %rax + .cfi_restore %rbx + .cfi_restore %rcx + .cfi_restore %rdx + .cfi_restore %rsi + .cfi_restore %rdi + .cfi_restore %r8 + .cfi_restore %r9 + .cfi_restore %r10 + .cfi_restore %r11 + ret + .cfi_endproc + +.globl __tsan_report_race_thunk +__tsan_report_race_thunk: + .cfi_startproc + # Save scratch registers. + push %rax + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rax, 0 + push %rcx + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rcx, 0 + push %rdx + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rdx, 0 + push %rsi + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rsi, 0 + push %rdi + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rdi, 0 + push %r8 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r8, 0 + push %r9 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r9, 0 + push %r10 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r10, 0 + push %r11 + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %r11, 0 + # Align stack frame. + push %rbx # non-scratch + .cfi_adjust_cfa_offset 8 + .cfi_rel_offset %rbx, 0 + mov %rsp, %rbx # save current rsp + .cfi_def_cfa_register %rbx + shr $4, %rsp # clear 4 lsb, align to 16 + shl $4, %rsp + + call __tsan_report_race + + # Unalign stack frame back. + mov %rbx, %rsp # restore the original rsp + .cfi_def_cfa_register %rsp + pop %rbx + .cfi_adjust_cfa_offset -8 + # Restore scratch registers. + pop %r11 + .cfi_adjust_cfa_offset -8 + pop %r10 + .cfi_adjust_cfa_offset -8 + pop %r9 + .cfi_adjust_cfa_offset -8 + pop %r8 + .cfi_adjust_cfa_offset -8 + pop %rdi + .cfi_adjust_cfa_offset -8 + pop %rsi + .cfi_adjust_cfa_offset -8 + pop %rdx + .cfi_adjust_cfa_offset -8 + pop %rcx + .cfi_adjust_cfa_offset -8 + pop %rax + .cfi_adjust_cfa_offset -8 + .cfi_restore %rax + .cfi_restore %rbx + .cfi_restore %rcx + .cfi_restore %rdx + .cfi_restore %rsi + .cfi_restore %rdi + .cfi_restore %r8 + .cfi_restore %r9 + .cfi_restore %r10 + .cfi_restore %r11 + ret + .cfi_endproc + +#ifdef __linux__ +/* We do not need executable stack. */ +.section .note.GNU-stack,"",@progbits +#endif diff --git a/libsanitizer/tsan/tsan_rtl_mutex.cc b/libsanitizer/tsan/tsan_rtl_mutex.cc new file mode 100644 index 0000000..098894f --- /dev/null +++ b/libsanitizer/tsan/tsan_rtl_mutex.cc @@ -0,0 +1,269 @@ +//===-- tsan_rtl_mutex.cc -------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "tsan_rtl.h" +#include "tsan_flags.h" +#include "tsan_sync.h" +#include "tsan_report.h" +#include "tsan_symbolize.h" +#include "tsan_platform.h" + +namespace __tsan { + +void MutexCreate(ThreadState *thr, uptr pc, uptr addr, + bool rw, bool recursive, bool linker_init) { + Context *ctx = CTX(); + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexCreate %zx\n", thr->tid, addr); + StatInc(thr, StatMutexCreate); + if (!linker_init && IsAppMem(addr)) + MemoryWrite1Byte(thr, pc, addr); + SyncVar *s = ctx->synctab.GetAndLock(thr, pc, addr, true); + s->is_rw = rw; + s->is_recursive = recursive; + s->is_linker_init = linker_init; + s->mtx.Unlock(); +} + +void MutexDestroy(ThreadState *thr, uptr pc, uptr addr) { + Context *ctx = CTX(); + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexDestroy %zx\n", thr->tid, addr); + StatInc(thr, StatMutexDestroy); +#ifndef TSAN_GO + // Global mutexes not marked as LINKER_INITIALIZED + // cause tons of not interesting reports, so just ignore it. + if (IsGlobalVar(addr)) + return; +#endif + SyncVar *s = ctx->synctab.GetAndRemove(thr, pc, addr); + if (s == 0) + return; + if (IsAppMem(addr)) + MemoryWrite1Byte(thr, pc, addr); + if (flags()->report_destroy_locked + && s->owner_tid != SyncVar::kInvalidTid + && !s->is_broken) { + s->is_broken = true; + ScopedReport rep(ReportTypeMutexDestroyLocked); + rep.AddMutex(s); + StackTrace trace; + trace.ObtainCurrent(thr, pc); + rep.AddStack(&trace); + FastState last(s->last_lock); + RestoreStack(last.tid(), last.epoch(), &trace); + rep.AddStack(&trace); + rep.AddLocation(s->addr, 1); + OutputReport(ctx, rep); + } + DestroyAndFree(s); +} + +void MutexLock(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexLock %zx\n", thr->tid, addr); + if (IsAppMem(addr)) + MemoryRead1Byte(thr, pc, addr); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeLock, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, true); + if (s->owner_tid == SyncVar::kInvalidTid) { + CHECK_EQ(s->recursion, 0); + s->owner_tid = thr->tid; + s->last_lock = thr->fast_state.raw(); + } else if (s->owner_tid == thr->tid) { + CHECK_GT(s->recursion, 0); + } else { + TsanPrintf("ThreadSanitizer WARNING: double lock\n"); + PrintCurrentStack(thr, pc); + } + if (s->recursion == 0) { + StatInc(thr, StatMutexLock); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->clock.acquire(&s->clock); + StatInc(thr, StatSyncAcquire); + thr->clock.acquire(&s->read_clock); + StatInc(thr, StatSyncAcquire); + } else if (!s->is_recursive) { + StatInc(thr, StatMutexRecLock); + } + s->recursion++; + s->mtx.Unlock(); +} + +void MutexUnlock(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexUnlock %zx\n", thr->tid, addr); + if (IsAppMem(addr)) + MemoryRead1Byte(thr, pc, addr); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeUnlock, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, true); + if (s->recursion == 0) { + if (!s->is_broken) { + s->is_broken = true; + TsanPrintf("ThreadSanitizer WARNING: unlock of unlocked mutex\n"); + PrintCurrentStack(thr, pc); + } + } else if (s->owner_tid != thr->tid) { + if (!s->is_broken) { + s->is_broken = true; + TsanPrintf("ThreadSanitizer WARNING: mutex unlock by another thread\n"); + PrintCurrentStack(thr, pc); + } + } else { + s->recursion--; + if (s->recursion == 0) { + StatInc(thr, StatMutexUnlock); + s->owner_tid = SyncVar::kInvalidTid; + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->fast_synch_epoch = thr->fast_state.epoch(); + thr->clock.ReleaseStore(&s->clock); + StatInc(thr, StatSyncRelease); + } else { + StatInc(thr, StatMutexRecUnlock); + } + } + s->mtx.Unlock(); +} + +void MutexReadLock(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexReadLock %zx\n", thr->tid, addr); + StatInc(thr, StatMutexReadLock); + if (IsAppMem(addr)) + MemoryRead1Byte(thr, pc, addr); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeRLock, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, false); + if (s->owner_tid != SyncVar::kInvalidTid) { + TsanPrintf("ThreadSanitizer WARNING: read lock of a write locked mutex\n"); + PrintCurrentStack(thr, pc); + } + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->clock.acquire(&s->clock); + s->last_lock = thr->fast_state.raw(); + StatInc(thr, StatSyncAcquire); + s->mtx.ReadUnlock(); +} + +void MutexReadUnlock(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexReadUnlock %zx\n", thr->tid, addr); + StatInc(thr, StatMutexReadUnlock); + if (IsAppMem(addr)) + MemoryRead1Byte(thr, pc, addr); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeRUnlock, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, true); + if (s->owner_tid != SyncVar::kInvalidTid) { + TsanPrintf("ThreadSanitizer WARNING: read unlock of a write " + "locked mutex\n"); + PrintCurrentStack(thr, pc); + } + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->fast_synch_epoch = thr->fast_state.epoch(); + thr->clock.release(&s->read_clock); + StatInc(thr, StatSyncRelease); + s->mtx.Unlock(); +} + +void MutexReadOrWriteUnlock(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: MutexReadOrWriteUnlock %zx\n", thr->tid, addr); + if (IsAppMem(addr)) + MemoryRead1Byte(thr, pc, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, true); + if (s->owner_tid == SyncVar::kInvalidTid) { + // Seems to be read unlock. + StatInc(thr, StatMutexReadUnlock); + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeRUnlock, addr); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->fast_synch_epoch = thr->fast_state.epoch(); + thr->clock.release(&s->read_clock); + StatInc(thr, StatSyncRelease); + } else if (s->owner_tid == thr->tid) { + // Seems to be write unlock. + CHECK_GT(s->recursion, 0); + s->recursion--; + if (s->recursion == 0) { + StatInc(thr, StatMutexUnlock); + s->owner_tid = SyncVar::kInvalidTid; + // FIXME: Refactor me, plz. + // The sequence of events is quite tricky and doubled in several places. + // First, it's a bug to increment the epoch w/o writing to the trace. + // Then, the acquire/release logic can be factored out as well. + thr->fast_state.IncrementEpoch(); + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeUnlock, addr); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->fast_synch_epoch = thr->fast_state.epoch(); + thr->clock.ReleaseStore(&s->clock); + StatInc(thr, StatSyncRelease); + } else { + StatInc(thr, StatMutexRecUnlock); + } + } else if (!s->is_broken) { + s->is_broken = true; + TsanPrintf("ThreadSanitizer WARNING: mutex unlock by another thread\n"); + PrintCurrentStack(thr, pc); + } + s->mtx.Unlock(); +} + +void Acquire(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: Acquire %zx\n", thr->tid, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, false); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->clock.acquire(&s->clock); + StatInc(thr, StatSyncAcquire); + s->mtx.ReadUnlock(); +} + +void Release(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: Release %zx\n", thr->tid, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, true); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->clock.release(&s->clock); + StatInc(thr, StatSyncRelease); + s->mtx.Unlock(); +} + +void ReleaseStore(ThreadState *thr, uptr pc, uptr addr) { + CHECK_GT(thr->in_rtl, 0); + DPrintf("#%d: ReleaseStore %zx\n", thr->tid, addr); + SyncVar *s = CTX()->synctab.GetAndLock(thr, pc, addr, true); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->clock.ReleaseStore(&s->clock); + StatInc(thr, StatSyncRelease); + s->mtx.Unlock(); +} + +#ifndef TSAN_GO +void AfterSleep(ThreadState *thr, uptr pc) { + Context *ctx = CTX(); + thr->last_sleep_stack_id = CurrentStackId(thr, pc); + Lock l(&ctx->thread_mtx); + for (unsigned i = 0; i < kMaxTid; i++) { + ThreadContext *tctx = ctx->threads[i]; + if (tctx == 0) + continue; + if (tctx->status == ThreadStatusRunning) + thr->last_sleep_clock.set(i, tctx->thr->fast_state.epoch()); + else + thr->last_sleep_clock.set(i, tctx->epoch1); + } +} +#endif + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_rtl_report.cc b/libsanitizer/tsan/tsan_rtl_report.cc new file mode 100644 index 0000000..1511913 --- /dev/null +++ b/libsanitizer/tsan/tsan_rtl_report.cc @@ -0,0 +1,461 @@ +//===-- tsan_rtl_report.cc ------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "sanitizer_common/sanitizer_stackdepot.h" +#include "tsan_platform.h" +#include "tsan_rtl.h" +#include "tsan_suppressions.h" +#include "tsan_symbolize.h" +#include "tsan_report.h" +#include "tsan_sync.h" +#include "tsan_mman.h" +#include "tsan_flags.h" + +namespace __tsan { + +void TsanCheckFailed(const char *file, int line, const char *cond, + u64 v1, u64 v2) { + ScopedInRtl in_rtl; + TsanPrintf("FATAL: ThreadSanitizer CHECK failed: " + "%s:%d \"%s\" (0x%zx, 0x%zx)\n", + file, line, cond, (uptr)v1, (uptr)v2); + Die(); +} + +// Can be overriden by an application/test to intercept reports. +#ifdef TSAN_EXTERNAL_HOOKS +bool OnReport(const ReportDesc *rep, bool suppressed); +#else +SANITIZER_INTERFACE_ATTRIBUTE +bool WEAK OnReport(const ReportDesc *rep, bool suppressed) { + (void)rep; + return suppressed; +} +#endif + +static void StackStripMain(ReportStack *stack) { + ReportStack *last_frame = 0; + ReportStack *last_frame2 = 0; + const char *prefix = "__interceptor_"; + uptr prefix_len = internal_strlen(prefix); + const char *path_prefix = flags()->strip_path_prefix; + uptr path_prefix_len = internal_strlen(path_prefix); + char *pos; + for (ReportStack *ent = stack; ent; ent = ent->next) { + if (ent->func && 0 == internal_strncmp(ent->func, prefix, prefix_len)) + ent->func += prefix_len; + if (ent->file && (pos = internal_strstr(ent->file, path_prefix))) + ent->file = pos + path_prefix_len; + if (ent->file && ent->file[0] == '.' && ent->file[1] == '/') + ent->file += 2; + last_frame2 = last_frame; + last_frame = ent; + } + + if (last_frame2 == 0) + return; + const char *last = last_frame->func; +#ifndef TSAN_GO + const char *last2 = last_frame2->func; + // Strip frame above 'main' + if (last2 && 0 == internal_strcmp(last2, "main")) { + last_frame2->next = 0; + // Strip our internal thread start routine. + } else if (last && 0 == internal_strcmp(last, "__tsan_thread_start_func")) { + last_frame2->next = 0; + // Strip global ctors init. + } else if (last && 0 == internal_strcmp(last, "__do_global_ctors_aux")) { + last_frame2->next = 0; + // If both are 0, then we probably just failed to symbolize. + } else if (last || last2) { + // Ensure that we recovered stack completely. Trimmed stack + // can actually happen if we do not instrument some code, + // so it's only a debug print. However we must try hard to not miss it + // due to our fault. + DPrintf("Bottom stack frame of stack %zx is missed\n", stack->pc); + } +#else + if (last && 0 == internal_strcmp(last, "schedunlock")) + last_frame2->next = 0; +#endif +} + +static ReportStack *SymbolizeStack(const StackTrace& trace) { + if (trace.IsEmpty()) + return 0; + ReportStack *stack = 0; + for (uptr si = 0; si < trace.Size(); si++) { + // We obtain the return address, that is, address of the next instruction, + // so offset it by 1 byte. + bool is_last = (si == trace.Size() - 1); + ReportStack *ent = SymbolizeCode(trace.Get(si) - !is_last); + CHECK_NE(ent, 0); + ReportStack *last = ent; + while (last->next) { + last->pc += !is_last; + last = last->next; + } + last->pc += !is_last; + last->next = stack; + stack = ent; + } + StackStripMain(stack); + return stack; +} + +ScopedReport::ScopedReport(ReportType typ) { + ctx_ = CTX(); + void *mem = internal_alloc(MBlockReport, sizeof(ReportDesc)); + rep_ = new(mem) ReportDesc; + rep_->typ = typ; + ctx_->report_mtx.Lock(); +} + +ScopedReport::~ScopedReport() { + ctx_->report_mtx.Unlock(); + rep_->~ReportDesc(); + internal_free(rep_); +} + +void ScopedReport::AddStack(const StackTrace *stack) { + ReportStack **rs = rep_->stacks.PushBack(); + *rs = SymbolizeStack(*stack); +} + +void ScopedReport::AddMemoryAccess(uptr addr, Shadow s, + const StackTrace *stack) { + void *mem = internal_alloc(MBlockReportMop, sizeof(ReportMop)); + ReportMop *mop = new(mem) ReportMop; + rep_->mops.PushBack(mop); + mop->tid = s.tid(); + mop->addr = addr + s.addr0(); + mop->size = s.size(); + mop->write = s.is_write(); + mop->nmutex = 0; + mop->stack = SymbolizeStack(*stack); +} + +void ScopedReport::AddThread(const ThreadContext *tctx) { + for (uptr i = 0; i < rep_->threads.Size(); i++) { + if (rep_->threads[i]->id == tctx->tid) + return; + } + void *mem = internal_alloc(MBlockReportThread, sizeof(ReportThread)); + ReportThread *rt = new(mem) ReportThread(); + rep_->threads.PushBack(rt); + rt->id = tctx->tid; + rt->pid = tctx->os_id; + rt->running = (tctx->status == ThreadStatusRunning); + rt->stack = SymbolizeStack(tctx->creation_stack); +} + +#ifndef TSAN_GO +static ThreadContext *FindThread(int unique_id) { + CTX()->thread_mtx.CheckLocked(); + for (unsigned i = 0; i < kMaxTid; i++) { + ThreadContext *tctx = CTX()->threads[i]; + if (tctx && tctx->unique_id == unique_id) { + return tctx; + } + } + return 0; +} +#endif + +void ScopedReport::AddMutex(const SyncVar *s) { + void *mem = internal_alloc(MBlockReportMutex, sizeof(ReportMutex)); + ReportMutex *rm = new(mem) ReportMutex(); + rep_->mutexes.PushBack(rm); + rm->id = 42; + rm->stack = SymbolizeStack(s->creation_stack); +} + +void ScopedReport::AddLocation(uptr addr, uptr size) { + if (addr == 0) + return; +#ifndef TSAN_GO + if (allocator()->PointerIsMine((void*)addr)) { + MBlock *b = user_mblock(0, (void*)addr); + ThreadContext *tctx = FindThread(b->alloc_tid); + void *mem = internal_alloc(MBlockReportLoc, sizeof(ReportLocation)); + ReportLocation *loc = new(mem) ReportLocation(); + rep_->locs.PushBack(loc); + loc->type = ReportLocationHeap; + loc->addr = (uptr)allocator()->GetBlockBegin((void*)addr); + loc->size = b->size; + loc->tid = tctx ? tctx->tid : b->alloc_tid; + loc->name = 0; + loc->file = 0; + loc->line = 0; + loc->stack = 0; + uptr ssz = 0; + const uptr *stack = StackDepotGet(b->alloc_stack_id, &ssz); + if (stack) { + StackTrace trace; + trace.Init(stack, ssz); + loc->stack = SymbolizeStack(trace); + } + if (tctx) + AddThread(tctx); + return; + } +#endif + ReportStack *symb = SymbolizeData(addr); + if (symb) { + void *mem = internal_alloc(MBlockReportLoc, sizeof(ReportLocation)); + ReportLocation *loc = new(mem) ReportLocation(); + rep_->locs.PushBack(loc); + loc->type = ReportLocationGlobal; + loc->addr = addr; + loc->size = size; + loc->tid = 0; + loc->name = symb->func; + loc->file = symb->file; + loc->line = symb->line; + loc->stack = 0; + internal_free(symb); + return; + } +} + +#ifndef TSAN_GO +void ScopedReport::AddSleep(u32 stack_id) { + uptr ssz = 0; + const uptr *stack = StackDepotGet(stack_id, &ssz); + if (stack) { + StackTrace trace; + trace.Init(stack, ssz); + rep_->sleep = SymbolizeStack(trace); + } +} +#endif + +const ReportDesc *ScopedReport::GetReport() const { + return rep_; +} + +void RestoreStack(int tid, const u64 epoch, StackTrace *stk) { + ThreadContext *tctx = CTX()->threads[tid]; + if (tctx == 0) + return; + Trace* trace = 0; + if (tctx->status == ThreadStatusRunning) { + CHECK(tctx->thr); + trace = &tctx->thr->trace; + } else if (tctx->status == ThreadStatusFinished + || tctx->status == ThreadStatusDead) { + if (tctx->dead_info == 0) + return; + trace = &tctx->dead_info->trace; + } else { + return; + } + Lock l(&trace->mtx); + const int partidx = (epoch / (kTraceSize / kTraceParts)) % kTraceParts; + TraceHeader* hdr = &trace->headers[partidx]; + if (epoch < hdr->epoch0) + return; + const u64 eend = epoch % kTraceSize; + const u64 ebegin = eend / kTracePartSize * kTracePartSize; + DPrintf("#%d: RestoreStack epoch=%zu ebegin=%zu eend=%zu partidx=%d\n", + tid, (uptr)epoch, (uptr)ebegin, (uptr)eend, partidx); + InternalScopedBuffer<uptr> stack(1024); // FIXME: de-hardcode 1024 + for (uptr i = 0; i < hdr->stack0.Size(); i++) { + stack[i] = hdr->stack0.Get(i); + DPrintf2(" #%02lu: pc=%zx\n", i, stack[i]); + } + uptr pos = hdr->stack0.Size(); + for (uptr i = ebegin; i <= eend; i++) { + Event ev = trace->events[i]; + EventType typ = (EventType)(ev >> 61); + uptr pc = (uptr)(ev & 0xffffffffffffull); + DPrintf2(" %zu typ=%d pc=%zx\n", i, typ, pc); + if (typ == EventTypeMop) { + stack[pos] = pc; + } else if (typ == EventTypeFuncEnter) { + stack[pos++] = pc; + } else if (typ == EventTypeFuncExit) { + if (pos > 0) + pos--; + } + for (uptr j = 0; j <= pos; j++) + DPrintf2(" #%zu: %zx\n", j, stack[j]); + } + if (pos == 0 && stack[0] == 0) + return; + pos++; + stk->Init(stack.data(), pos); +} + +static bool HandleRacyStacks(ThreadState *thr, const StackTrace (&traces)[2], + uptr addr_min, uptr addr_max) { + Context *ctx = CTX(); + bool equal_stack = false; + RacyStacks hash = {}; + if (flags()->suppress_equal_stacks) { + hash.hash[0] = md5_hash(traces[0].Begin(), traces[0].Size() * sizeof(uptr)); + hash.hash[1] = md5_hash(traces[1].Begin(), traces[1].Size() * sizeof(uptr)); + for (uptr i = 0; i < ctx->racy_stacks.Size(); i++) { + if (hash == ctx->racy_stacks[i]) { + DPrintf("ThreadSanitizer: suppressing report as doubled (stack)\n"); + equal_stack = true; + break; + } + } + } + bool equal_address = false; + RacyAddress ra0 = {addr_min, addr_max}; + if (flags()->suppress_equal_addresses) { + for (uptr i = 0; i < ctx->racy_addresses.Size(); i++) { + RacyAddress ra2 = ctx->racy_addresses[i]; + uptr maxbeg = max(ra0.addr_min, ra2.addr_min); + uptr minend = min(ra0.addr_max, ra2.addr_max); + if (maxbeg < minend) { + DPrintf("ThreadSanitizer: suppressing report as doubled (addr)\n"); + equal_address = true; + break; + } + } + } + if (equal_stack || equal_address) { + if (!equal_stack) + ctx->racy_stacks.PushBack(hash); + if (!equal_address) + ctx->racy_addresses.PushBack(ra0); + return true; + } + return false; +} + +static void AddRacyStacks(ThreadState *thr, const StackTrace (&traces)[2], + uptr addr_min, uptr addr_max) { + Context *ctx = CTX(); + if (flags()->suppress_equal_stacks) { + RacyStacks hash; + hash.hash[0] = md5_hash(traces[0].Begin(), traces[0].Size() * sizeof(uptr)); + hash.hash[1] = md5_hash(traces[1].Begin(), traces[1].Size() * sizeof(uptr)); + ctx->racy_stacks.PushBack(hash); + } + if (flags()->suppress_equal_addresses) { + RacyAddress ra0 = {addr_min, addr_max}; + ctx->racy_addresses.PushBack(ra0); + } +} + +bool OutputReport(Context *ctx, + const ScopedReport &srep, + const ReportStack *suppress_stack) { + const ReportDesc *rep = srep.GetReport(); + const uptr suppress_pc = IsSuppressed(rep->typ, suppress_stack); + if (suppress_pc != 0) { + FiredSuppression supp = {srep.GetReport()->typ, suppress_pc}; + ctx->fired_suppressions.PushBack(supp); + } + if (OnReport(rep, suppress_pc != 0)) + return false; + PrintReport(rep); + CTX()->nreported++; + return true; +} + +bool IsFiredSuppression(Context *ctx, + const ScopedReport &srep, + const StackTrace &trace) { + for (uptr k = 0; k < ctx->fired_suppressions.Size(); k++) { + if (ctx->fired_suppressions[k].type != srep.GetReport()->typ) + continue; + for (uptr j = 0; j < trace.Size(); j++) { + if (trace.Get(j) == ctx->fired_suppressions[k].pc) + return true; + } + } + return false; +} + +void ReportRace(ThreadState *thr) { + ScopedInRtl in_rtl; + + bool freed = false; + { + Shadow s(thr->racy_state[1]); + freed = s.GetFreedAndReset(); + thr->racy_state[1] = s.raw(); + } + + uptr addr = ShadowToMem((uptr)thr->racy_shadow_addr); + uptr addr_min = 0; + uptr addr_max = 0; + { + uptr a0 = addr + Shadow(thr->racy_state[0]).addr0(); + uptr a1 = addr + Shadow(thr->racy_state[1]).addr0(); + uptr e0 = a0 + Shadow(thr->racy_state[0]).size(); + uptr e1 = a1 + Shadow(thr->racy_state[1]).size(); + addr_min = min(a0, a1); + addr_max = max(e0, e1); + if (IsExpectedReport(addr_min, addr_max - addr_min)) + return; + } + + Context *ctx = CTX(); + Lock l0(&ctx->thread_mtx); + + ScopedReport rep(freed ? ReportTypeUseAfterFree : ReportTypeRace); + const uptr kMop = 2; + StackTrace traces[kMop]; + const uptr toppc = thr->trace.events[thr->fast_state.epoch() % kTraceSize] + & ((1ull << 61) - 1); + traces[0].ObtainCurrent(thr, toppc); + if (IsFiredSuppression(ctx, rep, traces[0])) + return; + Shadow s2(thr->racy_state[1]); + RestoreStack(s2.tid(), s2.epoch(), &traces[1]); + + if (HandleRacyStacks(thr, traces, addr_min, addr_max)) + return; + + for (uptr i = 0; i < kMop; i++) { + Shadow s(thr->racy_state[i]); + rep.AddMemoryAccess(addr, s, &traces[i]); + } + + for (uptr i = 0; i < kMop; i++) { + FastState s(thr->racy_state[i]); + ThreadContext *tctx = ctx->threads[s.tid()]; + if (s.epoch() < tctx->epoch0 || s.epoch() > tctx->epoch1) + continue; + rep.AddThread(tctx); + } + + rep.AddLocation(addr_min, addr_max - addr_min); + +#ifndef TSAN_GO + { // NOLINT + Shadow s(thr->racy_state[1]); + if (s.epoch() <= thr->last_sleep_clock.get(s.tid())) + rep.AddSleep(thr->last_sleep_stack_id); + } +#endif + + if (!OutputReport(ctx, rep, rep.GetReport()->mops[0]->stack)) + return; + + AddRacyStacks(thr, traces, addr_min, addr_max); +} + +void PrintCurrentStack(ThreadState *thr, uptr pc) { + StackTrace trace; + trace.ObtainCurrent(thr, pc); + PrintStack(SymbolizeStack(trace)); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_rtl_thread.cc b/libsanitizer/tsan/tsan_rtl_thread.cc new file mode 100644 index 0000000..0ae658c --- /dev/null +++ b/libsanitizer/tsan/tsan_rtl_thread.cc @@ -0,0 +1,397 @@ +//===-- tsan_rtl_thread.cc ------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_placement_new.h" +#include "tsan_rtl.h" +#include "tsan_mman.h" +#include "tsan_platform.h" +#include "tsan_report.h" +#include "tsan_sync.h" + +namespace __tsan { + +#ifndef TSAN_GO +const int kThreadQuarantineSize = 16; +#else +const int kThreadQuarantineSize = 64; +#endif + +static void MaybeReportThreadLeak(ThreadContext *tctx) { + if (tctx->detached) + return; + if (tctx->status != ThreadStatusCreated + && tctx->status != ThreadStatusRunning + && tctx->status != ThreadStatusFinished) + return; + ScopedReport rep(ReportTypeThreadLeak); + rep.AddThread(tctx); + OutputReport(CTX(), rep); +} + +void ThreadFinalize(ThreadState *thr) { + CHECK_GT(thr->in_rtl, 0); + if (!flags()->report_thread_leaks) + return; + Context *ctx = CTX(); + Lock l(&ctx->thread_mtx); + for (unsigned i = 0; i < kMaxTid; i++) { + ThreadContext *tctx = ctx->threads[i]; + if (tctx == 0) + continue; + MaybeReportThreadLeak(tctx); + } +} + +static void ThreadDead(ThreadState *thr, ThreadContext *tctx) { + Context *ctx = CTX(); + CHECK_GT(thr->in_rtl, 0); + CHECK(tctx->status == ThreadStatusRunning + || tctx->status == ThreadStatusFinished); + DPrintf("#%d: ThreadDead uid=%zu\n", thr->tid, tctx->user_id); + tctx->status = ThreadStatusDead; + tctx->user_id = 0; + tctx->sync.Reset(); + + // Put to dead list. + tctx->dead_next = 0; + if (ctx->dead_list_size == 0) + ctx->dead_list_head = tctx; + else + ctx->dead_list_tail->dead_next = tctx; + ctx->dead_list_tail = tctx; + ctx->dead_list_size++; +} + +int ThreadCreate(ThreadState *thr, uptr pc, uptr uid, bool detached) { + CHECK_GT(thr->in_rtl, 0); + Context *ctx = CTX(); + Lock l(&ctx->thread_mtx); + StatInc(thr, StatThreadCreate); + int tid = -1; + ThreadContext *tctx = 0; + if (ctx->dead_list_size > kThreadQuarantineSize + || ctx->thread_seq >= kMaxTid) { + if (ctx->dead_list_size == 0) { + TsanPrintf("ThreadSanitizer: %d thread limit exceeded. Dying.\n", + kMaxTid); + Die(); + } + StatInc(thr, StatThreadReuse); + tctx = ctx->dead_list_head; + ctx->dead_list_head = tctx->dead_next; + ctx->dead_list_size--; + if (ctx->dead_list_size == 0) { + CHECK_EQ(tctx->dead_next, 0); + ctx->dead_list_head = 0; + } + CHECK_EQ(tctx->status, ThreadStatusDead); + tctx->status = ThreadStatusInvalid; + tctx->reuse_count++; + tctx->sync.Reset(); + tid = tctx->tid; + DestroyAndFree(tctx->dead_info); + } else { + StatInc(thr, StatThreadMaxTid); + tid = ctx->thread_seq++; + void *mem = internal_alloc(MBlockThreadContex, sizeof(ThreadContext)); + tctx = new(mem) ThreadContext(tid); + ctx->threads[tid] = tctx; + } + CHECK_NE(tctx, 0); + CHECK_GE(tid, 0); + CHECK_LT(tid, kMaxTid); + DPrintf("#%d: ThreadCreate tid=%d uid=%zu\n", thr->tid, tid, uid); + CHECK_EQ(tctx->status, ThreadStatusInvalid); + ctx->alive_threads++; + if (ctx->max_alive_threads < ctx->alive_threads) { + ctx->max_alive_threads++; + CHECK_EQ(ctx->max_alive_threads, ctx->alive_threads); + StatInc(thr, StatThreadMaxAlive); + } + tctx->status = ThreadStatusCreated; + tctx->thr = 0; + tctx->user_id = uid; + tctx->unique_id = ctx->unique_thread_seq++; + tctx->detached = detached; + if (tid) { + thr->fast_state.IncrementEpoch(); + // Can't increment epoch w/o writing to the trace as well. + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeMop, 0); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->fast_synch_epoch = thr->fast_state.epoch(); + thr->clock.release(&tctx->sync); + StatInc(thr, StatSyncRelease); + + tctx->creation_stack.ObtainCurrent(thr, pc); + } + return tid; +} + +void ThreadStart(ThreadState *thr, int tid, uptr os_id) { + CHECK_GT(thr->in_rtl, 0); + uptr stk_addr = 0; + uptr stk_size = 0; + uptr tls_addr = 0; + uptr tls_size = 0; + GetThreadStackAndTls(tid == 0, &stk_addr, &stk_size, &tls_addr, &tls_size); + + if (tid) { + if (stk_addr && stk_size) { + MemoryResetRange(thr, /*pc=*/ 1, stk_addr, stk_size); + } + + if (tls_addr && tls_size) { + // Check that the thr object is in tls; + const uptr thr_beg = (uptr)thr; + const uptr thr_end = (uptr)thr + sizeof(*thr); + CHECK_GE(thr_beg, tls_addr); + CHECK_LE(thr_beg, tls_addr + tls_size); + CHECK_GE(thr_end, tls_addr); + CHECK_LE(thr_end, tls_addr + tls_size); + // Since the thr object is huge, skip it. + MemoryResetRange(thr, /*pc=*/ 2, tls_addr, thr_beg - tls_addr); + MemoryResetRange(thr, /*pc=*/ 2, thr_end, tls_addr + tls_size - thr_end); + } + } + + Lock l(&CTX()->thread_mtx); + ThreadContext *tctx = CTX()->threads[tid]; + CHECK_NE(tctx, 0); + CHECK_EQ(tctx->status, ThreadStatusCreated); + tctx->status = ThreadStatusRunning; + tctx->os_id = os_id; + tctx->epoch0 = tctx->epoch1 + 1; + tctx->epoch1 = (u64)-1; + new(thr) ThreadState(CTX(), tid, tctx->unique_id, + tctx->epoch0, stk_addr, stk_size, + tls_addr, tls_size); +#ifdef TSAN_GO + // Setup dynamic shadow stack. + const int kInitStackSize = 8; + thr->shadow_stack = (uptr*)internal_alloc(MBlockShadowStack, + kInitStackSize * sizeof(uptr)); + thr->shadow_stack_pos = thr->shadow_stack; + thr->shadow_stack_end = thr->shadow_stack + kInitStackSize; +#endif + tctx->thr = thr; + thr->fast_synch_epoch = tctx->epoch0; + thr->clock.set(tid, tctx->epoch0); + thr->clock.acquire(&tctx->sync); + StatInc(thr, StatSyncAcquire); + DPrintf("#%d: ThreadStart epoch=%zu stk_addr=%zx stk_size=%zx " + "tls_addr=%zx tls_size=%zx\n", + tid, (uptr)tctx->epoch0, stk_addr, stk_size, tls_addr, tls_size); + thr->is_alive = true; +} + +void ThreadFinish(ThreadState *thr) { + CHECK_GT(thr->in_rtl, 0); + StatInc(thr, StatThreadFinish); + // FIXME: Treat it as write. + if (thr->stk_addr && thr->stk_size) + MemoryResetRange(thr, /*pc=*/ 3, thr->stk_addr, thr->stk_size); + if (thr->tls_addr && thr->tls_size) { + const uptr thr_beg = (uptr)thr; + const uptr thr_end = (uptr)thr + sizeof(*thr); + // Since the thr object is huge, skip it. + MemoryResetRange(thr, /*pc=*/ 4, thr->tls_addr, thr_beg - thr->tls_addr); + MemoryResetRange(thr, /*pc=*/ 5, + thr_end, thr->tls_addr + thr->tls_size - thr_end); + } + thr->is_alive = false; + Context *ctx = CTX(); + Lock l(&ctx->thread_mtx); + ThreadContext *tctx = ctx->threads[thr->tid]; + CHECK_NE(tctx, 0); + CHECK_EQ(tctx->status, ThreadStatusRunning); + CHECK_GT(ctx->alive_threads, 0); + ctx->alive_threads--; + if (tctx->detached) { + ThreadDead(thr, tctx); + } else { + thr->fast_state.IncrementEpoch(); + // Can't increment epoch w/o writing to the trace as well. + TraceAddEvent(thr, thr->fast_state.epoch(), EventTypeMop, 0); + thr->clock.set(thr->tid, thr->fast_state.epoch()); + thr->fast_synch_epoch = thr->fast_state.epoch(); + thr->clock.release(&tctx->sync); + StatInc(thr, StatSyncRelease); + tctx->status = ThreadStatusFinished; + } + + // Save from info about the thread. + tctx->dead_info = new(internal_alloc(MBlockDeadInfo, sizeof(ThreadDeadInfo))) + ThreadDeadInfo(); + internal_memcpy(&tctx->dead_info->trace.events[0], + &thr->trace.events[0], sizeof(thr->trace.events)); + for (int i = 0; i < kTraceParts; i++) { + tctx->dead_info->trace.headers[i].stack0.CopyFrom( + thr->trace.headers[i].stack0); + } + tctx->epoch1 = thr->fast_state.epoch(); + +#ifndef TSAN_GO + AlloctorThreadFinish(thr); +#endif + thr->~ThreadState(); + StatAggregate(ctx->stat, thr->stat); + tctx->thr = 0; +} + +int ThreadTid(ThreadState *thr, uptr pc, uptr uid) { + CHECK_GT(thr->in_rtl, 0); + Context *ctx = CTX(); + Lock l(&ctx->thread_mtx); + int res = -1; + for (unsigned tid = 0; tid < kMaxTid; tid++) { + ThreadContext *tctx = ctx->threads[tid]; + if (tctx != 0 && tctx->user_id == uid + && tctx->status != ThreadStatusInvalid) { + tctx->user_id = 0; + res = tid; + break; + } + } + DPrintf("#%d: ThreadTid uid=%zu tid=%d\n", thr->tid, uid, res); + return res; +} + +void ThreadJoin(ThreadState *thr, uptr pc, int tid) { + CHECK_GT(thr->in_rtl, 0); + CHECK_GT(tid, 0); + CHECK_LT(tid, kMaxTid); + DPrintf("#%d: ThreadJoin tid=%d\n", thr->tid, tid); + Context *ctx = CTX(); + Lock l(&ctx->thread_mtx); + ThreadContext *tctx = ctx->threads[tid]; + if (tctx->status == ThreadStatusInvalid) { + TsanPrintf("ThreadSanitizer: join of non-existent thread\n"); + return; + } + CHECK_EQ(tctx->detached, false); + CHECK_EQ(tctx->status, ThreadStatusFinished); + thr->clock.acquire(&tctx->sync); + StatInc(thr, StatSyncAcquire); + ThreadDead(thr, tctx); +} + +void ThreadDetach(ThreadState *thr, uptr pc, int tid) { + CHECK_GT(thr->in_rtl, 0); + CHECK_GT(tid, 0); + CHECK_LT(tid, kMaxTid); + Context *ctx = CTX(); + Lock l(&ctx->thread_mtx); + ThreadContext *tctx = ctx->threads[tid]; + if (tctx->status == ThreadStatusInvalid) { + TsanPrintf("ThreadSanitizer: detach of non-existent thread\n"); + return; + } + if (tctx->status == ThreadStatusFinished) { + ThreadDead(thr, tctx); + } else { + tctx->detached = true; + } +} + +void ThreadFinalizerGoroutine(ThreadState *thr) { + thr->clock.Disable(thr->tid); +} + +void MemoryAccessRange(ThreadState *thr, uptr pc, uptr addr, + uptr size, bool is_write) { + if (size == 0) + return; + + u64 *shadow_mem = (u64*)MemToShadow(addr); + DPrintf2("#%d: MemoryAccessRange: @%p %p size=%d is_write=%d\n", + thr->tid, (void*)pc, (void*)addr, + (int)size, is_write); + +#if TSAN_DEBUG + if (!IsAppMem(addr)) { + TsanPrintf("Access to non app mem %zx\n", addr); + DCHECK(IsAppMem(addr)); + } + if (!IsAppMem(addr + size - 1)) { + TsanPrintf("Access to non app mem %zx\n", addr + size - 1); + DCHECK(IsAppMem(addr + size - 1)); + } + if (!IsShadowMem((uptr)shadow_mem)) { + TsanPrintf("Bad shadow addr %p (%zx)\n", shadow_mem, addr); + DCHECK(IsShadowMem((uptr)shadow_mem)); + } + if (!IsShadowMem((uptr)(shadow_mem + size * kShadowCnt / 8 - 1))) { + TsanPrintf("Bad shadow addr %p (%zx)\n", + shadow_mem + size * kShadowCnt / 8 - 1, addr + size - 1); + DCHECK(IsShadowMem((uptr)(shadow_mem + size * kShadowCnt / 8 - 1))); + } +#endif + + StatInc(thr, StatMopRange); + + FastState fast_state = thr->fast_state; + if (fast_state.GetIgnoreBit()) + return; + + fast_state.IncrementEpoch(); + thr->fast_state = fast_state; + TraceAddEvent(thr, fast_state.epoch(), EventTypeMop, pc); + + bool unaligned = (addr % kShadowCell) != 0; + + // Handle unaligned beginning, if any. + for (; addr % kShadowCell && size; addr++, size--) { + int const kAccessSizeLog = 0; + Shadow cur(fast_state); + cur.SetWrite(is_write); + cur.SetAddr0AndSizeLog(addr & (kShadowCell - 1), kAccessSizeLog); + MemoryAccessImpl(thr, addr, kAccessSizeLog, is_write, fast_state, + shadow_mem, cur); + } + if (unaligned) + shadow_mem += kShadowCnt; + // Handle middle part, if any. + for (; size >= kShadowCell; addr += kShadowCell, size -= kShadowCell) { + int const kAccessSizeLog = 3; + Shadow cur(fast_state); + cur.SetWrite(is_write); + cur.SetAddr0AndSizeLog(0, kAccessSizeLog); + MemoryAccessImpl(thr, addr, kAccessSizeLog, is_write, fast_state, + shadow_mem, cur); + shadow_mem += kShadowCnt; + } + // Handle ending, if any. + for (; size; addr++, size--) { + int const kAccessSizeLog = 0; + Shadow cur(fast_state); + cur.SetWrite(is_write); + cur.SetAddr0AndSizeLog(addr & (kShadowCell - 1), kAccessSizeLog); + MemoryAccessImpl(thr, addr, kAccessSizeLog, is_write, fast_state, + shadow_mem, cur); + } +} + +void MemoryRead1Byte(ThreadState *thr, uptr pc, uptr addr) { + MemoryAccess(thr, pc, addr, 0, 0); +} + +void MemoryWrite1Byte(ThreadState *thr, uptr pc, uptr addr) { + MemoryAccess(thr, pc, addr, 0, 1); +} + +void MemoryRead8Byte(ThreadState *thr, uptr pc, uptr addr) { + MemoryAccess(thr, pc, addr, 3, 0); +} + +void MemoryWrite8Byte(ThreadState *thr, uptr pc, uptr addr) { + MemoryAccess(thr, pc, addr, 3, 1); +} +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_stat.cc b/libsanitizer/tsan/tsan_stat.cc new file mode 100644 index 0000000..fcbc631 --- /dev/null +++ b/libsanitizer/tsan/tsan_stat.cc @@ -0,0 +1,247 @@ +//===-- tsan_stat.cc ------------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "tsan_stat.h" +#include "tsan_rtl.h" + +namespace __tsan { + +void StatAggregate(u64 *dst, u64 *src) { + if (!kCollectStats) + return; + for (int i = 0; i < StatCnt; i++) + dst[i] += src[i]; +} + +void StatOutput(u64 *stat) { + if (!kCollectStats) + return; + + stat[StatShadowNonZero] = stat[StatShadowProcessed] - stat[StatShadowZero]; + + static const char *name[StatCnt] = {}; + name[StatMop] = "Memory accesses "; + name[StatMopRead] = " Including reads "; + name[StatMopWrite] = " writes "; + name[StatMop1] = " Including size 1 "; + name[StatMop2] = " size 2 "; + name[StatMop4] = " size 4 "; + name[StatMop8] = " size 8 "; + name[StatMopSame] = " Including same "; + name[StatMopRange] = " Including range "; + name[StatShadowProcessed] = "Shadow processed "; + name[StatShadowZero] = " Including empty "; + name[StatShadowNonZero] = " Including non empty "; + name[StatShadowSameSize] = " Including same size "; + name[StatShadowIntersect] = " intersect "; + name[StatShadowNotIntersect] = " not intersect "; + name[StatShadowSameThread] = " Including same thread "; + name[StatShadowAnotherThread] = " another thread "; + name[StatShadowReplace] = " Including evicted "; + + name[StatFuncEnter] = "Function entries "; + name[StatFuncExit] = "Function exits "; + name[StatEvents] = "Events collected "; + + name[StatThreadCreate] = "Total threads created "; + name[StatThreadFinish] = " threads finished "; + name[StatThreadReuse] = " threads reused "; + name[StatThreadMaxTid] = " max tid "; + name[StatThreadMaxAlive] = " max alive threads "; + + name[StatMutexCreate] = "Mutexes created "; + name[StatMutexDestroy] = " destroyed "; + name[StatMutexLock] = " lock "; + name[StatMutexUnlock] = " unlock "; + name[StatMutexRecLock] = " recursive lock "; + name[StatMutexRecUnlock] = " recursive unlock "; + name[StatMutexReadLock] = " read lock "; + name[StatMutexReadUnlock] = " read unlock "; + + name[StatSyncCreated] = "Sync objects created "; + name[StatSyncDestroyed] = " destroyed "; + name[StatSyncAcquire] = " acquired "; + name[StatSyncRelease] = " released "; + + name[StatAtomic] = "Atomic operations "; + name[StatAtomicLoad] = " Including load "; + name[StatAtomicStore] = " store "; + name[StatAtomicExchange] = " exchange "; + name[StatAtomicFetchAdd] = " fetch_add "; + name[StatAtomicCAS] = " compare_exchange "; + name[StatAtomicFence] = " fence "; + name[StatAtomicRelaxed] = " Including relaxed "; + name[StatAtomicConsume] = " consume "; + name[StatAtomicAcquire] = " acquire "; + name[StatAtomicRelease] = " release "; + name[StatAtomicAcq_Rel] = " acq_rel "; + name[StatAtomicSeq_Cst] = " seq_cst "; + name[StatAtomic1] = " Including size 1 "; + name[StatAtomic2] = " size 2 "; + name[StatAtomic4] = " size 4 "; + name[StatAtomic8] = " size 8 "; + + name[StatInterceptor] = "Interceptors "; + name[StatInt_longjmp] = " longjmp "; + name[StatInt_siglongjmp] = " siglongjmp "; + name[StatInt_malloc] = " malloc "; + name[StatInt_calloc] = " calloc "; + name[StatInt_realloc] = " realloc "; + name[StatInt_free] = " free "; + name[StatInt_cfree] = " cfree "; + name[StatInt_mmap] = " mmap "; + name[StatInt_mmap64] = " mmap64 "; + name[StatInt_munmap] = " munmap "; + name[StatInt_memalign] = " memalign "; + name[StatInt_valloc] = " valloc "; + name[StatInt_pvalloc] = " pvalloc "; + name[StatInt_posix_memalign] = " posix_memalign "; + name[StatInt__Znwm] = " _Znwm "; + name[StatInt__ZnwmRKSt9nothrow_t] = " _ZnwmRKSt9nothrow_t "; + name[StatInt__Znam] = " _Znam "; + name[StatInt__ZnamRKSt9nothrow_t] = " _ZnamRKSt9nothrow_t "; + name[StatInt__ZdlPv] = " _ZdlPv "; + name[StatInt__ZdlPvRKSt9nothrow_t] = " _ZdlPvRKSt9nothrow_t "; + name[StatInt__ZdaPv] = " _ZdaPv "; + name[StatInt__ZdaPvRKSt9nothrow_t] = " _ZdaPvRKSt9nothrow_t "; + name[StatInt_strlen] = " strlen "; + name[StatInt_memset] = " memset "; + name[StatInt_memcpy] = " memcpy "; + name[StatInt_strcmp] = " strcmp "; + name[StatInt_memchr] = " memchr "; + name[StatInt_memrchr] = " memrchr "; + name[StatInt_memmove] = " memmove "; + name[StatInt_memcmp] = " memcmp "; + name[StatInt_strchr] = " strchr "; + name[StatInt_strchrnul] = " strchrnul "; + name[StatInt_strrchr] = " strrchr "; + name[StatInt_strncmp] = " strncmp "; + name[StatInt_strcpy] = " strcpy "; + name[StatInt_strncpy] = " strncpy "; + name[StatInt_strstr] = " strstr "; + name[StatInt_atexit] = " atexit "; + name[StatInt___cxa_guard_acquire] = " __cxa_guard_acquire "; + name[StatInt___cxa_guard_release] = " __cxa_guard_release "; + name[StatInt_pthread_create] = " pthread_create "; + name[StatInt_pthread_join] = " pthread_join "; + name[StatInt_pthread_detach] = " pthread_detach "; + name[StatInt_pthread_mutex_init] = " pthread_mutex_init "; + name[StatInt_pthread_mutex_destroy] = " pthread_mutex_destroy "; + name[StatInt_pthread_mutex_lock] = " pthread_mutex_lock "; + name[StatInt_pthread_mutex_trylock] = " pthread_mutex_trylock "; + name[StatInt_pthread_mutex_timedlock] = " pthread_mutex_timedlock "; + name[StatInt_pthread_mutex_unlock] = " pthread_mutex_unlock "; + name[StatInt_pthread_spin_init] = " pthread_spin_init "; + name[StatInt_pthread_spin_destroy] = " pthread_spin_destroy "; + name[StatInt_pthread_spin_lock] = " pthread_spin_lock "; + name[StatInt_pthread_spin_trylock] = " pthread_spin_trylock "; + name[StatInt_pthread_spin_unlock] = " pthread_spin_unlock "; + name[StatInt_pthread_rwlock_init] = " pthread_rwlock_init "; + name[StatInt_pthread_rwlock_destroy] = " pthread_rwlock_destroy "; + name[StatInt_pthread_rwlock_rdlock] = " pthread_rwlock_rdlock "; + name[StatInt_pthread_rwlock_tryrdlock] = " pthread_rwlock_tryrdlock "; + name[StatInt_pthread_rwlock_timedrdlock] + = " pthread_rwlock_timedrdlock "; + name[StatInt_pthread_rwlock_wrlock] = " pthread_rwlock_wrlock "; + name[StatInt_pthread_rwlock_trywrlock] = " pthread_rwlock_trywrlock "; + name[StatInt_pthread_rwlock_timedwrlock] + = " pthread_rwlock_timedwrlock "; + name[StatInt_pthread_rwlock_unlock] = " pthread_rwlock_unlock "; + name[StatInt_pthread_cond_init] = " pthread_cond_init "; + name[StatInt_pthread_cond_destroy] = " pthread_cond_destroy "; + name[StatInt_pthread_cond_signal] = " pthread_cond_signal "; + name[StatInt_pthread_cond_broadcast] = " pthread_cond_broadcast "; + name[StatInt_pthread_cond_wait] = " pthread_cond_wait "; + name[StatInt_pthread_cond_timedwait] = " pthread_cond_timedwait "; + name[StatInt_pthread_barrier_init] = " pthread_barrier_init "; + name[StatInt_pthread_barrier_destroy] = " pthread_barrier_destroy "; + name[StatInt_pthread_barrier_wait] = " pthread_barrier_wait "; + name[StatInt_pthread_once] = " pthread_once "; + name[StatInt_sem_init] = " sem_init "; + name[StatInt_sem_destroy] = " sem_destroy "; + name[StatInt_sem_wait] = " sem_wait "; + name[StatInt_sem_trywait] = " sem_trywait "; + name[StatInt_sem_timedwait] = " sem_timedwait "; + name[StatInt_sem_post] = " sem_post "; + name[StatInt_sem_getvalue] = " sem_getvalue "; + name[StatInt_read] = " read "; + name[StatInt_pread] = " pread "; + name[StatInt_pread64] = " pread64 "; + name[StatInt_readv] = " readv "; + name[StatInt_preadv64] = " preadv64 "; + name[StatInt_write] = " write "; + name[StatInt_pwrite] = " pwrite "; + name[StatInt_pwrite64] = " pwrite64 "; + name[StatInt_writev] = " writev "; + name[StatInt_pwritev64] = " pwritev64 "; + name[StatInt_send] = " send "; + name[StatInt_sendmsg] = " sendmsg "; + name[StatInt_recv] = " recv "; + name[StatInt_recvmsg] = " recvmsg "; + name[StatInt_unlink] = " unlink "; + name[StatInt_fopen] = " fopen "; + name[StatInt_fread] = " fread "; + name[StatInt_fwrite] = " fwrite "; + name[StatInt_puts] = " puts "; + name[StatInt_rmdir] = " rmdir "; + name[StatInt_opendir] = " opendir "; + name[StatInt_epoll_ctl] = " epoll_ctl "; + name[StatInt_epoll_wait] = " epoll_wait "; + name[StatInt_sigaction] = " sigaction "; + + name[StatAnnotation] = "Dynamic annotations "; + name[StatAnnotateHappensBefore] = " HappensBefore "; + name[StatAnnotateHappensAfter] = " HappensAfter "; + name[StatAnnotateCondVarSignal] = " CondVarSignal "; + name[StatAnnotateCondVarSignalAll] = " CondVarSignalAll "; + name[StatAnnotateMutexIsNotPHB] = " MutexIsNotPHB "; + name[StatAnnotateCondVarWait] = " CondVarWait "; + name[StatAnnotateRWLockCreate] = " RWLockCreate "; + name[StatAnnotateRWLockDestroy] = " RWLockDestroy "; + name[StatAnnotateRWLockAcquired] = " RWLockAcquired "; + name[StatAnnotateRWLockReleased] = " RWLockReleased "; + name[StatAnnotateTraceMemory] = " TraceMemory "; + name[StatAnnotateFlushState] = " FlushState "; + name[StatAnnotateNewMemory] = " NewMemory "; + name[StatAnnotateNoOp] = " NoOp "; + name[StatAnnotateFlushExpectedRaces] = " FlushExpectedRaces "; + name[StatAnnotateEnableRaceDetection] = " EnableRaceDetection "; + name[StatAnnotateMutexIsUsedAsCondVar] = " MutexIsUsedAsCondVar "; + name[StatAnnotatePCQGet] = " PCQGet "; + name[StatAnnotatePCQPut] = " PCQPut "; + name[StatAnnotatePCQDestroy] = " PCQDestroy "; + name[StatAnnotatePCQCreate] = " PCQCreate "; + name[StatAnnotateExpectRace] = " ExpectRace "; + name[StatAnnotateBenignRaceSized] = " BenignRaceSized "; + name[StatAnnotateBenignRace] = " BenignRace "; + name[StatAnnotateIgnoreReadsBegin] = " IgnoreReadsBegin "; + name[StatAnnotateIgnoreReadsEnd] = " IgnoreReadsEnd "; + name[StatAnnotateIgnoreWritesBegin] = " IgnoreWritesBegin "; + name[StatAnnotateIgnoreWritesEnd] = " IgnoreWritesEnd "; + name[StatAnnotatePublishMemoryRange] = " PublishMemoryRange "; + name[StatAnnotateUnpublishMemoryRange] = " UnpublishMemoryRange "; + name[StatAnnotateThreadName] = " ThreadName "; + + name[StatMtxTotal] = "Contentionz "; + name[StatMtxTrace] = " Trace "; + name[StatMtxThreads] = " Threads "; + name[StatMtxReport] = " Report "; + name[StatMtxSyncVar] = " SyncVar "; + name[StatMtxSyncTab] = " SyncTab "; + name[StatMtxSlab] = " Slab "; + name[StatMtxAtExit] = " Atexit "; + name[StatMtxAnnotations] = " Annotations "; + + TsanPrintf("Statistics:\n"); + for (int i = 0; i < StatCnt; i++) + TsanPrintf("%s: %zu\n", name[i], (uptr)stat[i]); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_stat.h b/libsanitizer/tsan/tsan_stat.h new file mode 100644 index 0000000..b194343 --- /dev/null +++ b/libsanitizer/tsan/tsan_stat.h @@ -0,0 +1,257 @@ +//===-- tsan_stat.h ---------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#ifndef TSAN_STAT_H +#define TSAN_STAT_H + +namespace __tsan { + +enum StatType { + // Memory access processing related stuff. + StatMop, + StatMopRead, + StatMopWrite, + StatMop1, // These must be consequtive. + StatMop2, + StatMop4, + StatMop8, + StatMopSame, + StatMopRange, + StatShadowProcessed, + StatShadowZero, + StatShadowNonZero, // Derived. + StatShadowSameSize, + StatShadowIntersect, + StatShadowNotIntersect, + StatShadowSameThread, + StatShadowAnotherThread, + StatShadowReplace, + + // Func processing. + StatFuncEnter, + StatFuncExit, + + // Trace processing. + StatEvents, + + // Threads. + StatThreadCreate, + StatThreadFinish, + StatThreadReuse, + StatThreadMaxTid, + StatThreadMaxAlive, + + // Mutexes. + StatMutexCreate, + StatMutexDestroy, + StatMutexLock, + StatMutexUnlock, + StatMutexRecLock, + StatMutexRecUnlock, + StatMutexReadLock, + StatMutexReadUnlock, + + // Synchronization. + StatSyncCreated, + StatSyncDestroyed, + StatSyncAcquire, + StatSyncRelease, + + // Atomics. + StatAtomic, + StatAtomicLoad, + StatAtomicStore, + StatAtomicExchange, + StatAtomicFetchAdd, + StatAtomicFetchSub, + StatAtomicFetchAnd, + StatAtomicFetchOr, + StatAtomicFetchXor, + StatAtomicCAS, + StatAtomicFence, + StatAtomicRelaxed, + StatAtomicConsume, + StatAtomicAcquire, + StatAtomicRelease, + StatAtomicAcq_Rel, + StatAtomicSeq_Cst, + StatAtomic1, + StatAtomic2, + StatAtomic4, + StatAtomic8, + + // Interceptors. + StatInterceptor, + StatInt_longjmp, + StatInt_siglongjmp, + StatInt_malloc, + StatInt_calloc, + StatInt_realloc, + StatInt_free, + StatInt_cfree, + StatInt_mmap, + StatInt_mmap64, + StatInt_munmap, + StatInt_memalign, + StatInt_valloc, + StatInt_pvalloc, + StatInt_posix_memalign, + StatInt__Znwm, + StatInt__ZnwmRKSt9nothrow_t, + StatInt__Znam, + StatInt__ZnamRKSt9nothrow_t, + StatInt__ZdlPv, + StatInt__ZdlPvRKSt9nothrow_t, + StatInt__ZdaPv, + StatInt__ZdaPvRKSt9nothrow_t, + StatInt_strlen, + StatInt_memset, + StatInt_memcpy, + StatInt_strcmp, + StatInt_memchr, + StatInt_memrchr, + StatInt_memmove, + StatInt_memcmp, + StatInt_strchr, + StatInt_strchrnul, + StatInt_strrchr, + StatInt_strncmp, + StatInt_strcpy, + StatInt_strncpy, + StatInt_strstr, + StatInt_atexit, + StatInt___cxa_guard_acquire, + StatInt___cxa_guard_release, + StatInt_pthread_create, + StatInt_pthread_join, + StatInt_pthread_detach, + StatInt_pthread_mutex_init, + StatInt_pthread_mutex_destroy, + StatInt_pthread_mutex_lock, + StatInt_pthread_mutex_trylock, + StatInt_pthread_mutex_timedlock, + StatInt_pthread_mutex_unlock, + StatInt_pthread_spin_init, + StatInt_pthread_spin_destroy, + StatInt_pthread_spin_lock, + StatInt_pthread_spin_trylock, + StatInt_pthread_spin_unlock, + StatInt_pthread_rwlock_init, + StatInt_pthread_rwlock_destroy, + StatInt_pthread_rwlock_rdlock, + StatInt_pthread_rwlock_tryrdlock, + StatInt_pthread_rwlock_timedrdlock, + StatInt_pthread_rwlock_wrlock, + StatInt_pthread_rwlock_trywrlock, + StatInt_pthread_rwlock_timedwrlock, + StatInt_pthread_rwlock_unlock, + StatInt_pthread_cond_init, + StatInt_pthread_cond_destroy, + StatInt_pthread_cond_signal, + StatInt_pthread_cond_broadcast, + StatInt_pthread_cond_wait, + StatInt_pthread_cond_timedwait, + StatInt_pthread_barrier_init, + StatInt_pthread_barrier_destroy, + StatInt_pthread_barrier_wait, + StatInt_pthread_once, + StatInt_sem_init, + StatInt_sem_destroy, + StatInt_sem_wait, + StatInt_sem_trywait, + StatInt_sem_timedwait, + StatInt_sem_post, + StatInt_sem_getvalue, + StatInt_read, + StatInt_pread, + StatInt_pread64, + StatInt_readv, + StatInt_preadv64, + StatInt_write, + StatInt_pwrite, + StatInt_pwrite64, + StatInt_writev, + StatInt_pwritev64, + StatInt_send, + StatInt_sendmsg, + StatInt_recv, + StatInt_recvmsg, + StatInt_unlink, + StatInt_fopen, + StatInt_fread, + StatInt_fwrite, + StatInt_puts, + StatInt_rmdir, + StatInt_opendir, + StatInt_epoll_ctl, + StatInt_epoll_wait, + StatInt_sigaction, + StatInt_signal, + StatInt_raise, + StatInt_kill, + StatInt_pthread_kill, + StatInt_sleep, + StatInt_usleep, + StatInt_nanosleep, + + // Dynamic annotations. + StatAnnotation, + StatAnnotateHappensBefore, + StatAnnotateHappensAfter, + StatAnnotateCondVarSignal, + StatAnnotateCondVarSignalAll, + StatAnnotateMutexIsNotPHB, + StatAnnotateCondVarWait, + StatAnnotateRWLockCreate, + StatAnnotateRWLockCreateStatic, + StatAnnotateRWLockDestroy, + StatAnnotateRWLockAcquired, + StatAnnotateRWLockReleased, + StatAnnotateTraceMemory, + StatAnnotateFlushState, + StatAnnotateNewMemory, + StatAnnotateNoOp, + StatAnnotateFlushExpectedRaces, + StatAnnotateEnableRaceDetection, + StatAnnotateMutexIsUsedAsCondVar, + StatAnnotatePCQGet, + StatAnnotatePCQPut, + StatAnnotatePCQDestroy, + StatAnnotatePCQCreate, + StatAnnotateExpectRace, + StatAnnotateBenignRaceSized, + StatAnnotateBenignRace, + StatAnnotateIgnoreReadsBegin, + StatAnnotateIgnoreReadsEnd, + StatAnnotateIgnoreWritesBegin, + StatAnnotateIgnoreWritesEnd, + StatAnnotatePublishMemoryRange, + StatAnnotateUnpublishMemoryRange, + StatAnnotateThreadName, + + // Internal mutex contentionz. + StatMtxTotal, + StatMtxTrace, + StatMtxThreads, + StatMtxReport, + StatMtxSyncVar, + StatMtxSyncTab, + StatMtxSlab, + StatMtxAnnotations, + StatMtxAtExit, + + // This must be the last. + StatCnt +}; + +} // namespace __tsan + +#endif // TSAN_STAT_H diff --git a/libsanitizer/tsan/tsan_suppressions.cc b/libsanitizer/tsan/tsan_suppressions.cc new file mode 100644 index 0000000..9b087ad --- /dev/null +++ b/libsanitizer/tsan/tsan_suppressions.cc @@ -0,0 +1,161 @@ +//===-- tsan_suppressions.cc ----------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "tsan_suppressions.h" +#include "tsan_rtl.h" +#include "tsan_flags.h" +#include "tsan_mman.h" +#include "tsan_platform.h" + +namespace __tsan { + +static Suppression *g_suppressions; + +static char *ReadFile(const char *filename) { + if (filename == 0 || filename[0] == 0) + return 0; + InternalScopedBuffer<char> tmp(4*1024); + if (filename[0] == '/') + internal_snprintf(tmp.data(), tmp.size(), "%s", filename); + else + internal_snprintf(tmp.data(), tmp.size(), "%s/%s", GetPwd(), filename); + fd_t fd = internal_open(tmp.data(), false); + if (fd == kInvalidFd) { + TsanPrintf("ThreadSanitizer: failed to open suppressions file '%s'\n", + tmp.data()); + Die(); + } + const uptr fsize = internal_filesize(fd); + if (fsize == (uptr)-1) { + TsanPrintf("ThreadSanitizer: failed to stat suppressions file '%s'\n", + tmp.data()); + Die(); + } + char *buf = (char*)internal_alloc(MBlockSuppression, fsize + 1); + if (fsize != internal_read(fd, buf, fsize)) { + TsanPrintf("ThreadSanitizer: failed to read suppressions file '%s'\n", + tmp.data()); + Die(); + } + internal_close(fd); + buf[fsize] = 0; + return buf; +} + +bool SuppressionMatch(char *templ, const char *str) { + if (str == 0 || str[0] == 0) + return false; + char *tpos; + const char *spos; + while (templ && templ[0]) { + if (templ[0] == '*') { + templ++; + continue; + } + if (str[0] == 0) + return false; + tpos = (char*)internal_strchr(templ, '*'); + if (tpos != 0) + tpos[0] = 0; + spos = internal_strstr(str, templ); + str = spos + internal_strlen(templ); + templ = tpos; + if (tpos) + tpos[0] = '*'; + if (spos == 0) + return false; + } + return true; +} + +Suppression *SuppressionParse(const char* supp) { + Suppression *head = 0; + const char *line = supp; + while (line) { + while (line[0] == ' ' || line[0] == '\t') + line++; + const char *end = internal_strchr(line, '\n'); + if (end == 0) + end = line + internal_strlen(line); + if (line != end && line[0] != '#') { + const char *end2 = end; + while (line != end2 && (end2[-1] == ' ' || end2[-1] == '\t')) + end2--; + SuppressionType stype; + if (0 == internal_strncmp(line, "race:", sizeof("race:") - 1)) { + stype = SuppressionRace; + line += sizeof("race:") - 1; + } else if (0 == internal_strncmp(line, "thread:", + sizeof("thread:") - 1)) { + stype = SuppressionThread; + line += sizeof("thread:") - 1; + } else if (0 == internal_strncmp(line, "mutex:", + sizeof("mutex:") - 1)) { + stype = SuppressionMutex; + line += sizeof("mutex:") - 1; + } else if (0 == internal_strncmp(line, "signal:", + sizeof("signal:") - 1)) { + stype = SuppressionSignal; + line += sizeof("signal:") - 1; + } else { + TsanPrintf("ThreadSanitizer: failed to parse suppressions file\n"); + Die(); + } + Suppression *s = (Suppression*)internal_alloc(MBlockSuppression, + sizeof(Suppression)); + s->next = head; + head = s; + s->type = stype; + s->templ = (char*)internal_alloc(MBlockSuppression, end2 - line + 1); + internal_memcpy(s->templ, line, end2 - line); + s->templ[end2 - line] = 0; + } + if (end[0] == 0) + break; + line = end + 1; + } + return head; +} + +void InitializeSuppressions() { + char *supp = ReadFile(flags()->suppressions); + g_suppressions = SuppressionParse(supp); +} + +uptr IsSuppressed(ReportType typ, const ReportStack *stack) { + if (g_suppressions == 0 || stack == 0) + return 0; + SuppressionType stype; + if (typ == ReportTypeRace) + stype = SuppressionRace; + else if (typ == ReportTypeThreadLeak) + stype = SuppressionThread; + else if (typ == ReportTypeMutexDestroyLocked) + stype = SuppressionMutex; + else if (typ == ReportTypeSignalUnsafe) + stype = SuppressionSignal; + else + return 0; + for (const ReportStack *frame = stack; frame; frame = frame->next) { + for (Suppression *supp = g_suppressions; supp; supp = supp->next) { + if (stype == supp->type && + (SuppressionMatch(supp->templ, frame->func) || + SuppressionMatch(supp->templ, frame->file))) { + DPrintf("ThreadSanitizer: matched suppression '%s'\n", supp->templ); + return frame->pc; + } + } + } + return 0; +} +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_suppressions.h b/libsanitizer/tsan/tsan_suppressions.h new file mode 100644 index 0000000..4761eaa --- /dev/null +++ b/libsanitizer/tsan/tsan_suppressions.h @@ -0,0 +1,41 @@ +//===-- tsan_suppressions.h -------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_SUPPRESSIONS_H +#define TSAN_SUPPRESSIONS_H + +#include "tsan_report.h" + +namespace __tsan { + +void InitializeSuppressions(); +void FinalizeSuppressions(); +uptr IsSuppressed(ReportType typ, const ReportStack *stack); + +// Exposed for testing. +enum SuppressionType { + SuppressionRace, + SuppressionMutex, + SuppressionThread, + SuppressionSignal +}; + +struct Suppression { + Suppression *next; + SuppressionType type; + char *templ; +}; + +Suppression *SuppressionParse(const char* supp); +bool SuppressionMatch(char *templ, const char *str); + +} // namespace __tsan + +#endif // TSAN_SUPPRESSIONS_H diff --git a/libsanitizer/tsan/tsan_symbolize.cc b/libsanitizer/tsan/tsan_symbolize.cc new file mode 100644 index 0000000..439b882 --- /dev/null +++ b/libsanitizer/tsan/tsan_symbolize.cc @@ -0,0 +1,83 @@ +//===-- tsan_symbolize.cc -------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "tsan_symbolize.h" + +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "sanitizer_common/sanitizer_symbolizer.h" +#include "tsan_flags.h" +#include "tsan_report.h" + +namespace __tsan { + +ReportStack *NewReportStackEntry(uptr addr) { + ReportStack *ent = (ReportStack*)internal_alloc(MBlockReportStack, + sizeof(ReportStack)); + internal_memset(ent, 0, sizeof(*ent)); + ent->pc = addr; + return ent; +} + +static ReportStack *NewReportStackEntry(const AddressInfo &info) { + ReportStack *ent = NewReportStackEntry(info.address); + if (info.module) { + // Strip module path to make output shorter. + const char *short_module_name = internal_strrchr(info.module, '/'); + if (short_module_name) + short_module_name += 1; + else + short_module_name = info.module; + ent->module = internal_strdup(short_module_name); + } + ent->offset = info.module_offset; + if (info.function) { + ent->func = internal_strdup(info.function); + } + if (info.file) + ent->file = internal_strdup(info.file); + ent->line = info.line; + ent->col = info.column; + return ent; +} + +ReportStack *SymbolizeCode(uptr addr) { + if (0 != internal_strcmp(flags()->external_symbolizer_path, "")) { + static const uptr kMaxAddrFrames = 16; + InternalScopedBuffer<AddressInfo> addr_frames(kMaxAddrFrames); + for (uptr i = 0; i < kMaxAddrFrames; i++) + new(&addr_frames[i]) AddressInfo(); + uptr addr_frames_num = __sanitizer::SymbolizeCode(addr, addr_frames.data(), + kMaxAddrFrames); + if (addr_frames_num == 0) + return NewReportStackEntry(addr); + ReportStack *top = 0; + ReportStack *bottom = 0; + for (uptr i = 0; i < addr_frames_num; i++) { + ReportStack *cur_entry = NewReportStackEntry(addr_frames[i]); + CHECK(cur_entry); + addr_frames[i].Clear(); + if (i == 0) + top = cur_entry; + else + bottom->next = cur_entry; + bottom = cur_entry; + } + return top; + } + return SymbolizeCodeAddr2Line(addr); +} + +ReportStack *SymbolizeData(uptr addr) { + return SymbolizeDataAddr2Line(addr); +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_symbolize.h b/libsanitizer/tsan/tsan_symbolize.h new file mode 100644 index 0000000..6ac19ca --- /dev/null +++ b/libsanitizer/tsan/tsan_symbolize.h @@ -0,0 +1,29 @@ +//===-- tsan_symbolize.h ----------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_SYMBOLIZE_H +#define TSAN_SYMBOLIZE_H + +#include "tsan_defs.h" +#include "tsan_report.h" + +namespace __tsan { + +ReportStack *SymbolizeCode(uptr addr); +ReportStack *SymbolizeData(uptr addr); + +ReportStack *SymbolizeCodeAddr2Line(uptr addr); +ReportStack *SymbolizeDataAddr2Line(uptr addr); + +ReportStack *NewReportStackEntry(uptr addr); + +} // namespace __tsan + +#endif // TSAN_SYMBOLIZE_H diff --git a/libsanitizer/tsan/tsan_symbolize_addr2line_linux.cc b/libsanitizer/tsan/tsan_symbolize_addr2line_linux.cc new file mode 100644 index 0000000..9caf091 --- /dev/null +++ b/libsanitizer/tsan/tsan_symbolize_addr2line_linux.cc @@ -0,0 +1,191 @@ +//===-- tsan_symbolize_addr2line.cc ---------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "tsan_symbolize.h" +#include "tsan_mman.h" +#include "tsan_rtl.h" +#include "tsan_platform.h" + +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> +#include <link.h> +#include <linux/limits.h> +#include <sys/types.h> + +namespace __tsan { + +struct ModuleDesc { + const char *fullname; + const char *name; + uptr base; + int inp_fd; + int out_fd; +}; + +struct SectionDesc { + SectionDesc *next; + ModuleDesc *module; + uptr base; + uptr end; +}; + +struct DlIteratePhdrCtx { + SectionDesc *sections; + bool is_first; +}; + +static void NOINLINE InitModule(ModuleDesc *m) { + int outfd[2] = {}; + if (pipe(&outfd[0])) { + TsanPrintf("ThreadSanitizer: outfd pipe() failed (%d)\n", errno); + Die(); + } + int infd[2] = {}; + if (pipe(&infd[0])) { + TsanPrintf("ThreadSanitizer: infd pipe() failed (%d)\n", errno); + Die(); + } + int pid = fork(); + if (pid == 0) { + flags()->log_fileno = STDERR_FILENO; + internal_close(STDOUT_FILENO); + internal_close(STDIN_FILENO); + internal_dup2(outfd[0], STDIN_FILENO); + internal_dup2(infd[1], STDOUT_FILENO); + internal_close(outfd[0]); + internal_close(outfd[1]); + internal_close(infd[0]); + internal_close(infd[1]); + for (int fd = getdtablesize(); fd > 2; fd--) + internal_close(fd); + execl("/usr/bin/addr2line", "/usr/bin/addr2line", "-Cfe", m->fullname, 0); + _exit(0); + } else if (pid < 0) { + TsanPrintf("ThreadSanitizer: failed to fork symbolizer\n"); + Die(); + } + internal_close(outfd[0]); + internal_close(infd[1]); + m->inp_fd = infd[0]; + m->out_fd = outfd[1]; +} + +static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) { + DlIteratePhdrCtx *ctx = (DlIteratePhdrCtx*)arg; + InternalScopedBuffer<char> tmp(128); + if (ctx->is_first) { + internal_snprintf(tmp.data(), tmp.size(), "/proc/%d/exe", GetPid()); + info->dlpi_name = tmp.data(); + } + ctx->is_first = false; + if (info->dlpi_name == 0 || info->dlpi_name[0] == 0) + return 0; + ModuleDesc *m = (ModuleDesc*)internal_alloc(MBlockReportStack, + sizeof(ModuleDesc)); + m->fullname = internal_strdup(info->dlpi_name); + m->name = internal_strrchr(m->fullname, '/'); + if (m->name) + m->name += 1; + else + m->name = m->fullname; + m->base = (uptr)info->dlpi_addr; + m->inp_fd = -1; + m->out_fd = -1; + DPrintf("Module %s %zx\n", m->name, m->base); + for (int i = 0; i < info->dlpi_phnum; i++) { + const Elf64_Phdr *s = &info->dlpi_phdr[i]; + DPrintf(" Section p_type=%zx p_offset=%zx p_vaddr=%zx p_paddr=%zx" + " p_filesz=%zx p_memsz=%zx p_flags=%zx p_align=%zx\n", + (uptr)s->p_type, (uptr)s->p_offset, (uptr)s->p_vaddr, + (uptr)s->p_paddr, (uptr)s->p_filesz, (uptr)s->p_memsz, + (uptr)s->p_flags, (uptr)s->p_align); + if (s->p_type != PT_LOAD) + continue; + SectionDesc *sec = (SectionDesc*)internal_alloc(MBlockReportStack, + sizeof(SectionDesc)); + sec->module = m; + sec->base = info->dlpi_addr + s->p_vaddr; + sec->end = sec->base + s->p_memsz; + sec->next = ctx->sections; + ctx->sections = sec; + DPrintf(" Section %zx-%zx\n", sec->base, sec->end); + } + return 0; +} + +static SectionDesc *InitSections() { + DlIteratePhdrCtx ctx = {0, true}; + dl_iterate_phdr(dl_iterate_phdr_cb, &ctx); + return ctx.sections; +} + +static SectionDesc *GetSectionDesc(uptr addr) { + static SectionDesc *sections = 0; + if (sections == 0) + sections = InitSections(); + for (SectionDesc *s = sections; s; s = s->next) { + if (addr >= s->base && addr < s->end) { + if (s->module->inp_fd == -1) + InitModule(s->module); + return s; + } + } + return 0; +} + +ReportStack *SymbolizeCodeAddr2Line(uptr addr) { + SectionDesc *s = GetSectionDesc(addr); + if (s == 0) + return NewReportStackEntry(addr); + ModuleDesc *m = s->module; + uptr offset = addr - m->base; + char addrstr[32]; + internal_snprintf(addrstr, sizeof(addrstr), "%p\n", (void*)offset); + if (0 >= internal_write(m->out_fd, addrstr, internal_strlen(addrstr))) { + TsanPrintf("ThreadSanitizer: can't write from symbolizer (%d, %d)\n", + m->out_fd, errno); + Die(); + } + InternalScopedBuffer<char> func(1024); + ssize_t len = internal_read(m->inp_fd, func.data(), func.size() - 1); + if (len <= 0) { + TsanPrintf("ThreadSanitizer: can't read from symbolizer (%d, %d)\n", + m->inp_fd, errno); + Die(); + } + func.data()[len] = 0; + ReportStack *res = NewReportStackEntry(addr); + res->module = internal_strdup(m->name); + res->offset = offset; + char *pos = (char*)internal_strchr(func.data(), '\n'); + if (pos && func[0] != '?') { + res->func = (char*)internal_alloc(MBlockReportStack, pos - func.data() + 1); + internal_memcpy(res->func, func.data(), pos - func.data()); + res->func[pos - func.data()] = 0; + char *pos2 = (char*)internal_strchr(pos, ':'); + if (pos2) { + res->file = (char*)internal_alloc(MBlockReportStack, pos2 - pos - 1 + 1); + internal_memcpy(res->file, pos + 1, pos2 - pos - 1); + res->file[pos2 - pos - 1] = 0; + res->line = atoi(pos2 + 1); + } + } + return res; +} + +ReportStack *SymbolizeDataAddr2Line(uptr addr) { + return 0; +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_sync.cc b/libsanitizer/tsan/tsan_sync.cc new file mode 100644 index 0000000..3bd1b35 --- /dev/null +++ b/libsanitizer/tsan/tsan_sync.cc @@ -0,0 +1,278 @@ +//===-- tsan_sync.cc ------------------------------------------------------===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#include "sanitizer_common/sanitizer_placement_new.h" +#include "tsan_sync.h" +#include "tsan_rtl.h" +#include "tsan_mman.h" + +namespace __tsan { + +SyncVar::SyncVar(uptr addr) + : mtx(MutexTypeSyncVar, StatMtxSyncVar) + , addr(addr) + , owner_tid(kInvalidTid) + , last_lock() + , recursion() + , is_rw() + , is_recursive() + , is_broken() + , is_linker_init() { +} + +SyncTab::Part::Part() + : mtx(MutexTypeSyncTab, StatMtxSyncTab) + , val() { +} + +SyncTab::SyncTab() { +} + +SyncTab::~SyncTab() { + for (int i = 0; i < kPartCount; i++) { + while (tab_[i].val) { + SyncVar *tmp = tab_[i].val; + tab_[i].val = tmp->next; + DestroyAndFree(tmp); + } + } +} + +SyncVar* SyncTab::GetAndLock(ThreadState *thr, uptr pc, + uptr addr, bool write_lock) { +#ifndef TSAN_GO + if (PrimaryAllocator::PointerIsMine((void*)addr)) { + MBlock *b = user_mblock(thr, (void*)addr); + Lock l(&b->mtx); + SyncVar *res = 0; + for (res = b->head; res; res = res->next) { + if (res->addr == addr) + break; + } + if (res == 0) { + StatInc(thr, StatSyncCreated); + void *mem = internal_alloc(MBlockSync, sizeof(SyncVar)); + res = new(mem) SyncVar(addr); + res->creation_stack.ObtainCurrent(thr, pc); + res->next = b->head; + b->head = res; + } + if (write_lock) + res->mtx.Lock(); + else + res->mtx.ReadLock(); + return res; + } +#endif + + Part *p = &tab_[PartIdx(addr)]; + { + ReadLock l(&p->mtx); + for (SyncVar *res = p->val; res; res = res->next) { + if (res->addr == addr) { + if (write_lock) + res->mtx.Lock(); + else + res->mtx.ReadLock(); + return res; + } + } + } + { + Lock l(&p->mtx); + SyncVar *res = p->val; + for (; res; res = res->next) { + if (res->addr == addr) + break; + } + if (res == 0) { + StatInc(thr, StatSyncCreated); + void *mem = internal_alloc(MBlockSync, sizeof(SyncVar)); + res = new(mem) SyncVar(addr); +#ifndef TSAN_GO + res->creation_stack.ObtainCurrent(thr, pc); +#endif + res->next = p->val; + p->val = res; + } + if (write_lock) + res->mtx.Lock(); + else + res->mtx.ReadLock(); + return res; + } +} + +SyncVar* SyncTab::GetAndRemove(ThreadState *thr, uptr pc, uptr addr) { +#ifndef TSAN_GO + if (PrimaryAllocator::PointerIsMine((void*)addr)) { + MBlock *b = user_mblock(thr, (void*)addr); + SyncVar *res = 0; + { + Lock l(&b->mtx); + SyncVar **prev = &b->head; + res = *prev; + while (res) { + if (res->addr == addr) { + if (res->is_linker_init) + return 0; + *prev = res->next; + break; + } + prev = &res->next; + res = *prev; + } + } + if (res) { + StatInc(thr, StatSyncDestroyed); + res->mtx.Lock(); + res->mtx.Unlock(); + } + return res; + } +#endif + + Part *p = &tab_[PartIdx(addr)]; + SyncVar *res = 0; + { + Lock l(&p->mtx); + SyncVar **prev = &p->val; + res = *prev; + while (res) { + if (res->addr == addr) { + if (res->is_linker_init) + return 0; + *prev = res->next; + break; + } + prev = &res->next; + res = *prev; + } + } + if (res) { + StatInc(thr, StatSyncDestroyed); + res->mtx.Lock(); + res->mtx.Unlock(); + } + return res; +} + +uptr SyncVar::GetMemoryConsumption() { + return sizeof(*this) + + clock.size() * sizeof(u64) + + read_clock.size() * sizeof(u64) + + creation_stack.Size() * sizeof(uptr); +} + +uptr SyncTab::GetMemoryConsumption(uptr *nsync) { + uptr mem = 0; + for (int i = 0; i < kPartCount; i++) { + Part *p = &tab_[i]; + Lock l(&p->mtx); + for (SyncVar *s = p->val; s; s = s->next) { + *nsync += 1; + mem += s->GetMemoryConsumption(); + } + } + return mem; +} + +int SyncTab::PartIdx(uptr addr) { + return (addr >> 3) % kPartCount; +} + +StackTrace::StackTrace() + : n_() + , s_() + , c_() { +} + +StackTrace::StackTrace(uptr *buf, uptr cnt) + : n_() + , s_(buf) + , c_(cnt) { + CHECK_NE(buf, 0); + CHECK_NE(cnt, 0); +} + +StackTrace::~StackTrace() { + Reset(); +} + +void StackTrace::Reset() { + if (s_ && !c_) { + CHECK_NE(n_, 0); + internal_free(s_); + s_ = 0; + } + n_ = 0; +} + +void StackTrace::Init(const uptr *pcs, uptr cnt) { + Reset(); + if (cnt == 0) + return; + if (c_) { + CHECK_NE(s_, 0); + CHECK_LE(cnt, c_); + } else { + s_ = (uptr*)internal_alloc(MBlockStackTrace, cnt * sizeof(s_[0])); + } + n_ = cnt; + internal_memcpy(s_, pcs, cnt * sizeof(s_[0])); +} + +void StackTrace::ObtainCurrent(ThreadState *thr, uptr toppc) { + Reset(); + n_ = thr->shadow_stack_pos - thr->shadow_stack; + if (n_ + !!toppc == 0) + return; + uptr start = 0; + if (c_) { + CHECK_NE(s_, 0); + if (n_ + !!toppc > c_) { + start = n_ - c_ + !!toppc; + n_ = c_ - !!toppc; + } + } else { + s_ = (uptr*)internal_alloc(MBlockStackTrace, + (n_ + !!toppc) * sizeof(s_[0])); + } + for (uptr i = 0; i < n_; i++) + s_[i] = thr->shadow_stack[start + i]; + if (toppc) { + s_[n_] = toppc; + n_++; + } +} + +void StackTrace::CopyFrom(const StackTrace& other) { + Reset(); + Init(other.Begin(), other.Size()); +} + +bool StackTrace::IsEmpty() const { + return n_ == 0; +} + +uptr StackTrace::Size() const { + return n_; +} + +uptr StackTrace::Get(uptr i) const { + CHECK_LT(i, n_); + return s_[i]; +} + +const uptr *StackTrace::Begin() const { + return s_; +} + +} // namespace __tsan diff --git a/libsanitizer/tsan/tsan_sync.h b/libsanitizer/tsan/tsan_sync.h new file mode 100644 index 0000000..2912d2c --- /dev/null +++ b/libsanitizer/tsan/tsan_sync.h @@ -0,0 +1,106 @@ +//===-- tsan_sync.h ---------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_SYNC_H +#define TSAN_SYNC_H + +#include "sanitizer_common/sanitizer_atomic.h" +#include "sanitizer_common/sanitizer_common.h" +#include "tsan_clock.h" +#include "tsan_defs.h" +#include "tsan_mutex.h" + +namespace __tsan { + +class SlabCache; + +class StackTrace { + public: + StackTrace(); + // Initialized the object in "static mode", + // in this mode it never calls malloc/free but uses the provided buffer. + StackTrace(uptr *buf, uptr cnt); + ~StackTrace(); + void Reset(); + + void Init(const uptr *pcs, uptr cnt); + void ObtainCurrent(ThreadState *thr, uptr toppc); + bool IsEmpty() const; + uptr Size() const; + uptr Get(uptr i) const; + const uptr *Begin() const; + void CopyFrom(const StackTrace& other); + + private: + uptr n_; + uptr *s_; + const uptr c_; + + StackTrace(const StackTrace&); + void operator = (const StackTrace&); +}; + +struct SyncVar { + explicit SyncVar(uptr addr); + + static const int kInvalidTid = -1; + + Mutex mtx; + const uptr addr; + SyncClock clock; + SyncClock read_clock; // Used for rw mutexes only. + StackTrace creation_stack; + int owner_tid; // Set only by exclusive owners. + u64 last_lock; + int recursion; + bool is_rw; + bool is_recursive; + bool is_broken; + bool is_linker_init; + SyncVar *next; // In SyncTab hashtable. + + uptr GetMemoryConsumption(); +}; + +class SyncTab { + public: + SyncTab(); + ~SyncTab(); + + // If the SyncVar does not exist yet, it is created. + SyncVar* GetAndLock(ThreadState *thr, uptr pc, + uptr addr, bool write_lock); + + // If the SyncVar does not exist, returns 0. + SyncVar* GetAndRemove(ThreadState *thr, uptr pc, uptr addr); + + uptr GetMemoryConsumption(uptr *nsync); + + private: + struct Part { + Mutex mtx; + SyncVar *val; + char pad[kCacheLineSize - sizeof(Mutex) - sizeof(SyncVar*)]; // NOLINT + Part(); + }; + + // FIXME: Implement something more sane. + static const int kPartCount = 1009; + Part tab_[kPartCount]; + + int PartIdx(uptr addr); + + SyncTab(const SyncTab&); // Not implemented. + void operator = (const SyncTab&); // Not implemented. +}; + +} // namespace __tsan + +#endif // TSAN_SYNC_H diff --git a/libsanitizer/tsan/tsan_trace.h b/libsanitizer/tsan/tsan_trace.h new file mode 100644 index 0000000..69233a6 --- /dev/null +++ b/libsanitizer/tsan/tsan_trace.h @@ -0,0 +1,73 @@ +//===-- tsan_trace.h --------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// +#ifndef TSAN_TRACE_H +#define TSAN_TRACE_H + +#include "tsan_defs.h" +#include "tsan_mutex.h" +#include "tsan_sync.h" + +namespace __tsan { + +#ifndef TSAN_HISTORY_SIZE // in kibitraces +#define TSAN_HISTORY_SIZE 128 +#endif + +const int kTracePartSize = 16 * 1024; +const int kTraceParts = TSAN_HISTORY_SIZE * 1024 / kTracePartSize; +const int kTraceSize = kTracePartSize * kTraceParts; + +// Must fit into 3 bits. +enum EventType { + EventTypeMop, + EventTypeFuncEnter, + EventTypeFuncExit, + EventTypeLock, + EventTypeUnlock, + EventTypeRLock, + EventTypeRUnlock +}; + +// Represents a thread event (from most significant bit): +// u64 typ : 3; // EventType. +// u64 addr : 61; // Associated pc. +typedef u64 Event; + +struct TraceHeader { + StackTrace stack0; // Start stack for the trace. + u64 epoch0; // Start epoch for the trace. +#ifndef TSAN_GO + uptr stack0buf[kTraceStackSize]; +#endif + + TraceHeader() +#ifndef TSAN_GO + : stack0(stack0buf, kTraceStackSize) +#else + : stack0() +#endif + , epoch0() { + } +}; + +struct Trace { + Event events[kTraceSize]; + TraceHeader headers[kTraceParts]; + Mutex mtx; + + Trace() + : mtx(MutexTypeTrace, StatMtxTrace) { + } +}; + +} // namespace __tsan + +#endif // TSAN_TRACE_H diff --git a/libsanitizer/tsan/tsan_update_shadow_word_inl.h b/libsanitizer/tsan/tsan_update_shadow_word_inl.h new file mode 100644 index 0000000..ae4a318 --- /dev/null +++ b/libsanitizer/tsan/tsan_update_shadow_word_inl.h @@ -0,0 +1,77 @@ +//===-- tsan_update_shadow_word_inl.h ---------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +// Body of the hottest inner loop. +// If we wrap this body into a function, compilers (both gcc and clang) +// produce sligtly less efficient code. +//===----------------------------------------------------------------------===// +do { + StatInc(thr, StatShadowProcessed); + const unsigned kAccessSize = 1 << kAccessSizeLog; + unsigned off = cur.ComputeSearchOffset(); + u64 *sp = &shadow_mem[(idx + off) % kShadowCnt]; + old = LoadShadow(sp); + if (old.IsZero()) { + StatInc(thr, StatShadowZero); + if (store_word) + StoreIfNotYetStored(sp, &store_word); + // The above StoreIfNotYetStored could be done unconditionally + // and it even shows 4% gain on synthetic benchmarks (r4307). + break; + } + // is the memory access equal to the previous? + if (Shadow::Addr0AndSizeAreEqual(cur, old)) { + StatInc(thr, StatShadowSameSize); + // same thread? + if (Shadow::TidsAreEqual(old, cur)) { + StatInc(thr, StatShadowSameThread); + if (OldIsInSameSynchEpoch(old, thr)) { + if (OldIsRWStronger(old, kAccessIsWrite)) { + // found a slot that holds effectively the same info + // (that is, same tid, same sync epoch and same size) + StatInc(thr, StatMopSame); + return; + } + StoreIfNotYetStored(sp, &store_word); + break; + } + if (OldIsRWWeaker(old, kAccessIsWrite)) + StoreIfNotYetStored(sp, &store_word); + break; + } + StatInc(thr, StatShadowAnotherThread); + if (HappensBefore(old, thr)) { + StoreIfNotYetStored(sp, &store_word); + break; + } + if (BothReads(old, kAccessIsWrite)) + break; + goto RACE; + } + + // Do the memory access intersect? + if (Shadow::TwoRangesIntersect(old, cur, kAccessSize)) { + StatInc(thr, StatShadowIntersect); + if (Shadow::TidsAreEqual(old, cur)) { + StatInc(thr, StatShadowSameThread); + break; + } + StatInc(thr, StatShadowAnotherThread); + if (HappensBefore(old, thr)) + break; + + if (BothReads(old, kAccessIsWrite)) + break; + + goto RACE; + } + // The accesses do not intersect. + StatInc(thr, StatShadowNotIntersect); + break; +} while (0); diff --git a/libsanitizer/tsan/tsan_vector.h b/libsanitizer/tsan/tsan_vector.h new file mode 100644 index 0000000..d6bb707 --- /dev/null +++ b/libsanitizer/tsan/tsan_vector.h @@ -0,0 +1,108 @@ +//===-- tsan_vector.h -------------------------------------------*- C++ -*-===// +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +// Low-fat STL-like vector container. + +#ifndef TSAN_VECTOR_H +#define TSAN_VECTOR_H + +#include "tsan_defs.h" +#include "tsan_mman.h" + +namespace __tsan { + +template<typename T> +class Vector { + public: + explicit Vector(MBlockType typ) + : typ_(typ) + , begin_() + , end_() + , last_() { + } + + ~Vector() { + if (begin_) + internal_free(begin_); + } + + void Reset() { + if (begin_) + internal_free(begin_); + begin_ = 0; + end_ = 0; + last_ = 0; + } + + uptr Size() const { + return end_ - begin_; + } + + T &operator[](uptr i) { + DCHECK_LT(i, end_ - begin_); + return begin_[i]; + } + + const T &operator[](uptr i) const { + DCHECK_LT(i, end_ - begin_); + return begin_[i]; + } + + T *PushBack(T v = T()) { + EnsureSize(Size() + 1); + end_[-1] = v; + return &end_[-1]; + } + + void Resize(uptr size) { + uptr old_size = Size(); + EnsureSize(size); + if (old_size < size) { + for (uptr i = old_size; i < size; i++) + begin_[i] = T(); + } + } + + private: + const MBlockType typ_; + T *begin_; + T *end_; + T *last_; + + void EnsureSize(uptr size) { + if (size <= Size()) + return; + if (size <= (uptr)(last_ - begin_)) { + end_ = begin_ + size; + return; + } + uptr cap0 = last_ - begin_; + uptr cap = 2 * cap0; + if (cap == 0) + cap = 16; + if (cap < size) + cap = size; + T *p = (T*)internal_alloc(typ_, cap * sizeof(T)); + if (cap0) { + internal_memcpy(p, begin_, cap0 * sizeof(T)); + internal_free(begin_); + } + begin_ = p; + end_ = begin_ + size; + last_ = begin_ + cap; + } + + Vector(const Vector&); + void operator=(const Vector&); +}; +} + +#endif // #ifndef TSAN_VECTOR_H |