diff options
| -rw-r--r-- | ChangeLog | 45 | ||||
| -rw-r--r-- | INSTALL | 27 | ||||
| -rw-r--r-- | Makeconfig | 76 | ||||
| -rw-r--r-- | Makerules | 46 | ||||
| -rw-r--r-- | NEWS | 5 | ||||
| -rw-r--r-- | README.pretty-printers | 169 | ||||
| -rw-r--r-- | Rules | 44 | ||||
| -rw-r--r-- | manual/install.texi | 30 | ||||
| -rw-r--r-- | nptl/Makefile | 18 | ||||
| -rw-r--r-- | nptl/nptl-printers.py | 633 | ||||
| -rw-r--r-- | nptl/nptl_lock_constants.pysym | 75 | ||||
| -rw-r--r-- | nptl/test-cond-printers.c | 57 | ||||
| -rw-r--r-- | nptl/test-cond-printers.py | 50 | ||||
| -rw-r--r-- | nptl/test-condattr-printers.c | 94 | ||||
| -rw-r--r-- | nptl/test-condattr-printers.py | 71 | ||||
| -rw-r--r-- | nptl/test-mutex-printers.c | 151 | ||||
| -rw-r--r-- | nptl/test-mutex-printers.py | 97 | ||||
| -rw-r--r-- | nptl/test-mutexattr-printers.c | 144 | ||||
| -rw-r--r-- | nptl/test-mutexattr-printers.py | 101 | ||||
| -rw-r--r-- | nptl/test-rwlock-printers.c | 78 | ||||
| -rw-r--r-- | nptl/test-rwlock-printers.py | 64 | ||||
| -rw-r--r-- | nptl/test-rwlockattr-printers.c | 98 | ||||
| -rw-r--r-- | nptl/test-rwlockattr-printers.py | 73 | ||||
| -rw-r--r-- | scripts/gen-py-const.awk | 118 | ||||
| -rw-r--r-- | scripts/test_printers_common.py | 364 | ||||
| -rw-r--r-- | scripts/test_printers_exceptions.py | 61 |
26 files changed, 2769 insertions, 20 deletions
@@ -1,3 +1,48 @@ +2016-12-08 Martin Galvan <martin.galvan@tallertechnologies.com> + + * INSTALL: Regenerated. + * Makeconfig: Add comments and whitespace to make the control flow + clearer. + (+link-printers-tests, +link-pie-printers-tests, + CFLAGS-printers-tests, installed-rtld-LDFLAGS, + built-rtld-LDFLAGS, link-libc-rpath, + link-libc-tests-after-rpath-link, + link-libc-printers-tests): New. + (rtld-LDFLAGS, rtld-tests-LDFLAGS, link-libc-tests-rpath-link, + link-libc-tests): Use the new variables as required. + * Makerules ($(py-const)): New rule. + generated: Add $(py-const). + * README.pretty-printers: New file. + * Rules (tests-printers-programs, tests-printers-out, py-env): New. + (others): Depend on $(py-const). + (tests): Depend on $(tests-printers-programs) or + $(tests-printers-out), + as required. Pass $(tests-printers) to merge-test-results.sh. + * manual/install.texi: Add requirements for testing the pretty + printers. + * nptl/Makefile (gen-py-const-headers, pretty-printers, + tests-printers, CFLAGS-test-mutexattr-printers.c + CFLAGS-test-mutex-printers.c, CFLAGS-test-condattr-printers.c, + CFLAGS-test-cond-printers.c, CFLAGS-test-rwlockattr-printers.c + CFLAGS-test-rwlock-printers.c, tests-printers-libs): Define. + * nptl/nptl-printers.py: New file. + * nptl/nptl_lock_constants.pysym: Likewise. + * nptl/test-cond-printers.c: Likewise. + * nptl/test-cond-printers.py: Likewise. + * nptl/test-condattr-printers.c: Likewise. + * nptl/test-condattr-printers.py: Likewise. + * nptl/test-mutex-printers.c: Likewise. + * nptl/test-mutex-printers.py: Likewise. + * nptl/test-mutexattr-printers.c: Likewise. + * nptl/test-mutexattr-printers.py: Likewise. + * nptl/test-rwlock-printers.c: Likewise. + * nptl/test-rwlock-printers.py: Likewise. + * nptl/test-rwlockattr-printers.c: Likewise. + * nptl/test-rwlockattr-printers.py: Likewise. + * scripts/gen-py-const.awk: Likewise. + * scripts/test_printers_common.py: Likewise. + * scripts/test_printers_exceptions.py: Likewise. + 2016-12-07 Joseph Myers <joseph@codesourcery.com> * scripts/build-many-glibcs.py (Context.__init__): Take strip @@ -224,6 +224,33 @@ You can specify 'stop-on-test-failure=y' when running 'make check' to make the test run stop and exit with an error status immediately when a failure occurs. + The GNU C Library pretty printers come with their own set of scripts +for testing, which run together with the rest of the testsuite through +'make check'. These scripts require the following tools to run +successfully: + + * Python 2.7.6/3.4.3 or later + + Python is required for running the printers' test scripts. + + * PExpect 4.0 + + The printer tests drive GDB through test programs and compare its + output to the printers'. PExpect is used to capture the output of + GDB, and should be compatible with the Python version in your + system. + + * GDB 7.8 or later with support for Python 2.7.6/3.4.3 or later + + GDB itself needs to be configured with Python support in order to + use the pretty printers. Notice that your system having Python + available doesn't imply that GDB supports it, nor that your + system's Python and GDB's have the same version. + +If these tools are absent, the printer tests will report themselves as +'UNSUPPORTED'. Notice that some of the printer tests require the GNU C +Library to be compiled with debugging symbols. + To format the 'GNU C Library Reference Manual' for printing, type 'make dvi'. You need a working TeX installation to do this. The distribution builds the on-line formatted version of the manual, as Info @@ -416,6 +416,11 @@ $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \ $(+link-pie-after-libc) $(call after-link,$@) endef +define +link-pie-printers-tests +$(+link-pie-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \ + $(+link-pie-after-libc) +$(call after-link,$@) +endef endif # Command for statically linking programs with the C library. ifndef +link-static @@ -445,7 +450,8 @@ ifeq (yes,$(build-pie-default)) no-pie-ldflag = -no-pie +link = $(+link-pie) +link-tests = $(+link-pie-tests) -else ++link-printers-tests = $(+link-pie-printers-tests) +else # not build-pie-default +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \ $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \ @@ -466,51 +472,87 @@ $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \ $(+link-after-libc) $(call after-link,$@) endef -endif -else +define +link-printers-tests +$(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \ + $(+link-after-libc) +$(call after-link,$@) +endef +endif # build-pie-default +else # build-static +link = $(+link-static) +link-tests = $(+link-static-tests) -endif -endif ++link-printers-tests = $(+link-static-tests) +endif # build-shared +endif # +link + +# The pretty printer test programs need to be compiled without optimizations +# so they won't confuse gdb. We could use either the 'GCC optimize' pragma +# or the 'optimize' function attribute to achieve this; however, at least on +# ARM, gcc always produces different debugging symbols when invoked with +# a -O greater than 0 than when invoked with -O0, regardless of anything else +# we're using to suppress optimizations. Therefore, we need to explicitly pass +# -O0 to it through CFLAGS. +# Additionally, the build system will try to -include $(common-objpfx)/config.h +# when compiling the tests, which will throw an error if some special macros +# (such as __OPTIMIZE__ and IS_IN_build) aren't defined. To avoid this, we +# tell gcc to define IS_IN_build. +CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build + ifeq (yes,$(build-shared)) +# These indicate whether to link using the built ld.so or the installed one. +installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name) +built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so + ifndef rtld-LDFLAGS -rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name) +rtld-LDFLAGS = $(installed-rtld-LDFLAGS) endif + ifndef rtld-tests-LDFLAGS ifeq (yes,$(build-hardcoded-path-in-tests)) -rtld-tests-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so +rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS) else -rtld-tests-LDFLAGS = $(rtld-LDFLAGS) -endif -endif -endif +rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS) +endif # build-hardcoded-path-in-tests +endif # rtld-tests-LDFLAGS + +endif # build-shared + ifndef link-libc ifeq (yes,$(build-shared)) # We need the versioned name of libc.so in the deps of $(others) et al # so that the symlink to libc.so is created before anything tries to # run the linked programs. +link-libc-rpath = -Wl,-rpath=$(rpath-link) link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link) + ifeq (yes,$(build-hardcoded-path-in-tests)) -link-libc-tests-rpath-link = -Wl,-rpath=$(rpath-link) +link-libc-tests-rpath-link = $(link-libc-rpath) else link-libc-tests-rpath-link = $(link-libc-rpath-link) -endif +endif # build-hardcoded-path-in-tests + link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \ $(common-objpfx)$(patsubst %,$(libtype.oS),c) \ $(as-needed) $(elf-objpfx)ld.so \ $(no-as-needed) link-libc = $(link-libc-rpath-link) $(link-libc-before-gnulib) $(gnulib) + +link-libc-tests-after-rpath-link = $(link-libc-before-gnulib) $(gnulib-tests) link-libc-tests = $(link-libc-tests-rpath-link) \ - $(link-libc-before-gnulib) $(gnulib-tests) + $(link-libc-tests-after-rpath-link) +# Pretty printer test programs always require rpath instead of rpath-link. +link-libc-printers-tests = $(link-libc-rpath) \ + $(link-libc-tests-after-rpath-link) + # This is how to find at build-time things that will be installed there. rpath-dirs = math elf dlfcn nss nis rt resolv crypt mathvec rpath-link = \ $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%))) -else +else # build-static link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib) link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests) -endif -endif +endif # build-shared +endif # link-libc # Differences in the linkers on the various platforms. LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN' @@ -210,6 +210,52 @@ sed-remove-dotdot := -e 's@ *\([^ \/$$][^ \]*\)@ $$(..)\1@g' \ -e 's@^\([^ \/$$][^ \]*\)@$$(..)\1@g' endif +ifdef gen-py-const-headers +# We'll use a static pattern rule to match .pysym files with their +# corresponding generated .py files. +# The generated .py files go in the submodule's dir in the glibc build dir. +py-const-files := $(patsubst %.pysym,%.py,$(gen-py-const-headers)) +py-const-dir := $(objpfx) +py-const := $(addprefix $(py-const-dir),$(py-const-files)) +py-const-script := $(..)scripts/gen-py-const.awk + +# This is a hack we use to generate .py files with constants for Python +# pretty printers. It works the same way as gen-as-const. +# See scripts/gen-py-const.awk for details on how the awk | gcc mechanism +# works. +# +# $@.tmp and $@.tmp2 are temporary files we use to store the partial contents +# of the target file. We do this instead of just writing on $@ because, if the +# build process terminates prematurely, re-running Make wouldn't run this rule +# since Make would see that the target file already exists (despite it being +# incomplete). +# +# The sed line replaces "@name@SOME_NAME@value@SOME_VALUE@" strings from the +# output of 'gcc -S' with "SOME_NAME = SOME_VALUE" strings. +# The '-n' option, combined with the '/p' command, makes sed output only the +# modified lines instead of the whole input file. The output is redirected +# to a .py file; we'll import it in the pretty printers file to read +# the constants generated by gen-py-const.awk. +# The regex has two capturing groups, for SOME_NAME and SOME_VALUE +# respectively. Notice SOME_VALUE may be prepended by a special character, +# depending on the assembly syntax (e.g. immediates are prefixed by a '$' +# in AT&T x86, and by a '#' in ARM). We discard it using a complemented set +# before the second capturing group. +$(py-const): $(py-const-dir)%.py: %.pysym $(py-const-script) \ + $(common-before-compile) + $(make-target-directory) + $(AWK) -f $(py-const-script) $< \ + | $(CC) -S -o $@.tmp $(CFLAGS) $(CPPFLAGS) -x c - + echo '# GENERATED FILE\n' > $@.tmp2 + echo '# Constant definitions for pretty printers.' >> $@.tmp2 + echo '# See gen-py-const.awk for details.\n' >> $@.tmp2 + sed -n -r 's/^.*@name@([^@]+)@value@[^[:xdigit:]Xx-]*([[:xdigit:]Xx-]+)@.*/\1 = \2/p' \ + $@.tmp >> $@.tmp2 + mv -f $@.tmp2 $@ + rm -f $@.tmp + +generated += $(py-const) +endif # gen-py-const-headers ifdef gen-as-const-headers # Generating headers for assembly constants. @@ -141,6 +141,11 @@ Version 2.25 variable for a particular architecture in the GCC source file 'gcc/config.gcc'. +* GDB pretty printers have been added for mutex and condition variable + structures in POSIX Threads. When installed and loaded in gdb these pretty + printers show various pthread variables in human-readable form when read + using the 'print' or 'display' commands in gdb. + Security related changes: On ARM EABI (32-bit), generating a backtrace for execution contexts which diff --git a/README.pretty-printers b/README.pretty-printers new file mode 100644 index 0000000..8662900 --- /dev/null +++ b/README.pretty-printers @@ -0,0 +1,169 @@ +README for the glibc Python pretty printers +=========================================== + +Pretty printers are gdb extensions that allow it to print useful, human-readable +information about a program's variables. For example, for a pthread_mutex_t +gdb would usually output something like this: + +(gdb) print mutex +$1 = { + __data = { + __lock = 22020096, + __count = 0, + __owner = 0, + __nusers = 0, + __kind = 576, + __spins = 0, + __elision = 0, + __list = { + __prev = 0x0, + __next = 0x0 + } + }, + __size = "\000\000P\001", '\000' <repeats 12 times>, "@\002", '\000' <repeats 21 times>, + __align = 22020096 +} + +However, with a pretty printer gdb will output something like this: + +(gdb) print mutex +$1 = pthread_mutex_t = { + Type = Normal, + Status = Unlocked, + Robust = No, + Shared = No, + Protocol = Priority protect, + Priority ceiling = 42 +} + +Before printing a value, gdb will first check if there's a pretty printer +registered for it. If there is, it'll use it, otherwise it'll print the value +as usual. Pretty printers can be registered in various ways; for our purposes +we register them for the current objfile by calling +gdb.printing.register_pretty_printer(). + +Currently our printers are based on gdb.RegexpCollectionPrettyPrinter, which +means they'll be triggered if the type of the variable we're printing matches +a given regular expression. For example, MutexPrinter will be triggered if +our variable's type matches the regexp '^pthread_mutex_t$'. + +Besides the printers themselves, each module may have a constants file which the +printers will import. These constants are generated from C headers during the +build process, and need to be in the Python search path when loading the +printers. + + +Installing and loading +---------------------- + +The pretty printers and their constant files may be installed in different paths +for each distro, though gdb should be able to automatically load them by itself. +When in doubt, you can use the 'info pretty-printer' gdb command to list the +loaded pretty printers. + +If the printers aren't automatically loaded for some reason, you should add the +following to your .gdbinit: + +python +import sys +sys.path.insert(0, '/path/to/constants/file/directory') +end + +source /path/to/printers.py + +If you're building glibc manually, '/path/to/constants/file/directory' should be +'/path/to/glibc-build/submodule', where 'submodule' is e.g. nptl. + + +Testing +------- + +The pretty printers come with a small test suite based on PExpect, which is a +Python module with Expect-like features for spawning and controlling interactive +programs. Each printer has a corresponding C program and a Python script +that uses PExpect to drive gdb through the program and compare its output to +the expected printer's. + +The tests run on the glibc host, which is assumed to have both gdb and PExpect; +if any of those is absent the tests will fail with code 77 (UNSUPPORTED). +Native builds can be tested simply by doing 'make check'; cross builds must use +cross-test-ssh.sh as test-wrapper, like this: + +make test-wrapper='/path/to/scripts/cross-test-ssh.sh user@host' check + +(Remember to share the build system's filesystem with the glibc host's through +NFS or something similar). + +Running 'make check' on a cross build will only compile the test programs, +without running the scripts. + + +Adding new pretty printers +-------------------------- + +Adding new pretty printers to glibc requires following these steps: + +1. Identify which constants must be generated from C headers, and write the +corresponding .pysym file. See scripts/gen-py-const.awk for more information +on how this works. The name of the .pysym file must be added to the +'gen-py-const-headers' variable in your submodule's Makefile (without the .pysym +extension). + +2. Write the pretty printer code itself. For this you can follow the gdb +Python API documentation, and use the existing printers as examples. The printer +code must import the generated constants file (which will have the same name +as your .pysym file). The names of the pretty printer files must be added +to the 'pretty-printers' variable in your submodule's Makefile (without the .py +extension). + +3. Write the unit tests for your pretty printers. The build system calls each +test script passing it the paths to the test program source, the test program +binary, and the printer files you added to 'pretty-printers' in the previous +step. The test scripts, in turn, must import scripts/test_printers_common +and call the init_test function passing it, among other things, the name of the +set of pretty printers to enable (as seen by running 'info pretty-printer'). +You can use the existing unit tests as examples. + +4. Add the names of the pretty printer tests to the 'tests-printers' variable +in your submodule's Makefile (without extensions). In addition, for each test +program you must define a corresponding CFLAGS-* variable and set it to +$(CFLAGS-printers-tests) to ensure they're compiled correctly. For example, +test-foo-printer.c requires the following: + +CFLAGS-test-foo-printer.c := $(CFLAGS-printers-tests) + +Finally, if your programs need to be linked with a specific library, you can add +its name to the 'tests-printers-libs' variable in your submodule's Makefile. + + +Known issues +------------ + +* Pretty printers are inherently coupled to the code they're targetting, thus +any changes to the target code must also update the corresponding printers. +On the plus side, the printer code itself may serve as a kind of documentation +for the target code. + +* Older versions of the gdb Python API have a bug where +gdb.RegexpCollectionPrettyPrinter would not be able to get a value's real type +if it was typedef'd. This would cause gdb to ignore the pretty printers for +types like pthread_mutex_t, which is defined as: + +typedef union +{ + ... +} pthread_mutex_t; + +This was fixed in commit 1b588015839caafc608a6944a78aea170f5fb2f6, and released +as part of gdb 7.8. However, typedef'ing an already typedef'd type may cause +a similar issue, e.g.: + +typedef pthread_mutex_t mutex; +mutex a_mutex; + +Here, trying to print a_mutex won't trigger the pthread_mutex_t printer. + +* The test programs must be compiled without optimizations. This is necessary +because the test scripts rely on the C code structure being preserved when +stepping through the programs. Things like aggressive instruction reordering +or optimizing variables out may make this kind of testing impossible. @@ -108,17 +108,28 @@ endif .PHONY: others tests bench bench-build +# Test programs for the pretty printers. +tests-printers-programs := $(addprefix $(objpfx),$(tests-printers)) + +# .out files with the output of running the pretty printer tests. +tests-printers-out := $(patsubst %,$(objpfx)%.out,$(tests-printers)) + ifeq ($(build-programs),yes) others: $(addprefix $(objpfx),$(others) $(sysdep-others) $(extra-objs)) else others: $(addprefix $(objpfx),$(extra-objs)) endif + +# Generate constant files for Python pretty printers if required. +others: $(py-const) + ifeq ($(run-built-tests),no) tests: $(addprefix $(objpfx),$(filter-out $(tests-unsupported),$(tests)) \ - $(test-srcs)) $(tests-special) + $(test-srcs)) $(tests-special) \ + $(tests-printers-programs) xtests: tests $(xtests-special) else -tests: $(tests:%=$(objpfx)%.out) $(tests-special) +tests: $(tests:%=$(objpfx)%.out) $(tests-special) $(tests-printers-out) xtests: tests $(xtests:%=$(objpfx)%.out) $(xtests-special) endif @@ -131,7 +142,8 @@ tests-expected = $(tests) endif tests: $(..)scripts/merge-test-results.sh -s $(objpfx) $(subdir) \ - $(sort $(tests-expected) $(tests-special-notdir:.out=)) \ + $(sort $(tests-expected) $(tests-special-notdir:.out=) \ + $(tests-printers)) \ > $(objpfx)subdir-tests.sum xtests: $(..)scripts/merge-test-results.sh -s $(objpfx) $(subdir) \ @@ -241,6 +253,32 @@ endif endif # tests +ifneq "$(strip $(tests-printers))" "" +# We're defining this here for now; later it'll be defined at configure time +# inside Makeconfig. +PYTHON := python + +# Static pattern rule for building the test programs for the pretty printers. +$(tests-printers-programs): %: %.o $(tests-printers-libs) \ + $(sort $(filter $(common-objpfx)lib%,$(link-libc-static-tests))) \ + $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit) + $(+link-printers-tests) + +# Add the paths to the generated constants file and test_common_printers.py +# to PYTHONPATH so the test scripts can find them. +py-env := PYTHONPATH=$(py-const-dir):$(..)scripts:$${PYTHONPATH} + +# Static pattern rule that matches the test-* targets to their .c and .py +# prerequisites. It'll run the corresponding test script for each test program +# we compiled and place its output in the corresponding .out file. +# The pretty printer files and test_common_printers.py must be present for all. +$(tests-printers-out): $(objpfx)%.out: $(objpfx)% %.py %.c $(pretty-printers) \ + $(..)scripts/test_printers_common.py + $(test-wrapper-env) $(py-env) \ + $(PYTHON) $*.py $*.c $(objpfx)$* $(pretty-printers) > $@; \ + $(evaluate-test) +endif + .PHONY: distclean realclean subdir_distclean subdir_realclean \ subdir_clean subdir_mostlyclean subdir_testclean diff --git a/manual/install.texi b/manual/install.texi index de1c203..35e02ad 100644 --- a/manual/install.texi +++ b/manual/install.texi @@ -256,6 +256,36 @@ occurred. You can specify @samp{stop-on-test-failure=y} when running @code{make check} to make the test run stop and exit with an error status immediately when a failure occurs. +The @glibcadj{} pretty printers come with their own set of scripts for testing, +which run together with the rest of the testsuite through @code{make check}. +These scripts require the following tools to run successfully: + +@itemize @bullet +@item +Python 2.7.6/3.4.3 or later + +Python is required for running the printers' test scripts. + +@item PExpect 4.0 + +The printer tests drive GDB through test programs and compare its output +to the printers'. PExpect is used to capture the output of GDB, and should be +compatible with the Python version in your system. + +@item +GDB 7.8 or later with support for Python 2.7.6/3.4.3 or later + +GDB itself needs to be configured with Python support in order to use the +pretty printers. Notice that your system having Python available doesn't imply +that GDB supports it, nor that your system's Python and GDB's have the same +version. +@end itemize + +@noindent +If these tools are absent, the printer tests will report themselves as +@code{UNSUPPORTED}. Notice that some of the printer tests require @theglibc{} +to be compiled with debugging symbols. + To format the @cite{GNU C Library Reference Manual} for printing, type @w{@code{make dvi}}. You need a working @TeX{} installation to do this. The distribution builds the on-line formatted version of the diff --git a/nptl/Makefile b/nptl/Makefile index 11588fe..7ac9196 100644 --- a/nptl/Makefile +++ b/nptl/Makefile @@ -312,6 +312,24 @@ gen-as-const-headers = pthread-errnos.sym \ unwindbuf.sym \ lowlevelrobustlock.sym pthread-pi-defines.sym +gen-py-const-headers := nptl_lock_constants.pysym +pretty-printers := nptl-printers.py +tests-printers := test-mutexattr-printers test-mutex-printers \ + test-condattr-printers test-cond-printers \ + test-rwlockattr-printers test-rwlock-printers + +CFLAGS-test-mutexattr-printers.c := $(CFLAGS-printers-tests) +CFLAGS-test-mutex-printers.c := $(CFLAGS-printers-tests) +CFLAGS-test-condattr-printers.c := $(CFLAGS-printers-tests) +CFLAGS-test-cond-printers.c := $(CFLAGS-printers-tests) +CFLAGS-test-rwlockattr-printers.c := $(CFLAGS-printers-tests) +CFLAGS-test-rwlock-printers.c := $(CFLAGS-printers-tests) + +ifeq ($(build-shared),yes) +tests-printers-libs := $(shared-thread-library) +else +tests-printers-libs := $(static-thread-library) +endif LDFLAGS-pthread.so = -Wl,--enable-new-dtags,-z,nodelete,-z,initfirst diff --git a/nptl/nptl-printers.py b/nptl/nptl-printers.py new file mode 100644 index 0000000..e402f23 --- /dev/null +++ b/nptl/nptl-printers.py @@ -0,0 +1,633 @@ +# Pretty printers for the NPTL lock types. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +"""This file contains the gdb pretty printers for the following types: + + * pthread_mutex_t + * pthread_mutexattr_t + * pthread_cond_t + * pthread_condattr_t + * pthread_rwlock_t + * pthread_rwlockattr_t + +You can check which printers are registered and enabled by issuing the +'info pretty-printer' gdb command. Printers should trigger automatically when +trying to print a variable of one of the types mentioned above. +""" + +from __future__ import print_function + +import gdb +import gdb.printing +from nptl_lock_constants import * + +MUTEX_TYPES = { + PTHREAD_MUTEX_NORMAL: ('Type', 'Normal'), + PTHREAD_MUTEX_RECURSIVE: ('Type', 'Recursive'), + PTHREAD_MUTEX_ERRORCHECK: ('Type', 'Error check'), + PTHREAD_MUTEX_ADAPTIVE_NP: ('Type', 'Adaptive') +} + +class MutexPrinter(object): + """Pretty printer for pthread_mutex_t.""" + + def __init__(self, mutex): + """Initialize the printer's internal data structures. + + Args: + mutex: A gdb.value representing a pthread_mutex_t. + """ + + data = mutex['__data'] + self.lock = data['__lock'] + self.count = data['__count'] + self.owner = data['__owner'] + self.kind = data['__kind'] + self.values = [] + self.read_values() + + def to_string(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_mutex_t. + """ + + return 'pthread_mutex_t' + + def children(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_mutex_t. + """ + + return self.values + + def read_values(self): + """Read the mutex's info and store it in self.values. + + The data contained in self.values will be returned by the Iterator + created in self.children. + """ + + self.read_type() + self.read_status() + self.read_attributes() + self.read_misc_info() + + def read_type(self): + """Read the mutex's type.""" + + mutex_type = self.kind & PTHREAD_MUTEX_KIND_MASK + + # mutex_type must be casted to int because it's a gdb.Value + self.values.append(MUTEX_TYPES[int(mutex_type)]) + + def read_status(self): + """Read the mutex's status. + + For architectures which support lock elision, this method reads + whether the mutex appears as locked in memory (i.e. it may show it as + unlocked even after calling pthread_mutex_lock). + """ + + if self.kind == PTHREAD_MUTEX_DESTROYED: + self.values.append(('Status', 'Destroyed')) + elif self.kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP: + self.read_status_robust() + else: + self.read_status_no_robust() + + def read_status_robust(self): + """Read the status of a robust mutex. + + In glibc robust mutexes are implemented in a very different way than + non-robust ones. This method reads their locking status, + whether it may have waiters, their registered owner (if any), + whether the owner is alive or not, and the status of the state + they're protecting. + """ + + if self.lock == PTHREAD_MUTEX_UNLOCKED: + self.values.append(('Status', 'Unlocked')) + else: + if self.lock & FUTEX_WAITERS: + self.values.append(('Status', 'Locked, possibly with waiters')) + else: + self.values.append(('Status', + 'Locked, possibly with no waiters')) + + if self.lock & FUTEX_OWNER_DIED: + self.values.append(('Owner ID', '%d (dead)' % self.owner)) + else: + self.values.append(('Owner ID', self.lock & FUTEX_TID_MASK)) + + if self.owner == PTHREAD_MUTEX_INCONSISTENT: + self.values.append(('State protected by this mutex', + 'Inconsistent')) + elif self.owner == PTHREAD_MUTEX_NOTRECOVERABLE: + self.values.append(('State protected by this mutex', + 'Not recoverable')) + + def read_status_no_robust(self): + """Read the status of a non-robust mutex. + + Read info on whether the mutex is locked, if it may have waiters + and its owner (if any). + """ + + lock_value = self.lock + + if self.kind & PTHREAD_MUTEX_PRIO_PROTECT_NP: + lock_value &= ~(PTHREAD_MUTEX_PRIO_CEILING_MASK) + + if lock_value == PTHREAD_MUTEX_UNLOCKED: + self.values.append(('Status', 'Unlocked')) + else: + if self.kind & PTHREAD_MUTEX_PRIO_INHERIT_NP: + waiters = self.lock & FUTEX_WAITERS + owner = self.lock & FUTEX_TID_MASK + else: + # Mutex protocol is PP or none + waiters = (self.lock != PTHREAD_MUTEX_LOCKED_NO_WAITERS) + owner = self.owner + + if waiters: + self.values.append(('Status', 'Locked, possibly with waiters')) + else: + self.values.append(('Status', + 'Locked, possibly with no waiters')) + + self.values.append(('Owner ID', owner)) + + def read_attributes(self): + """Read the mutex's attributes.""" + + if self.kind != PTHREAD_MUTEX_DESTROYED: + if self.kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP: + self.values.append(('Robust', 'Yes')) + else: + self.values.append(('Robust', 'No')) + + # In glibc, robust mutexes always have their pshared flag set to + # 'shared' regardless of what the pshared flag of their + # mutexattr was. Therefore a robust mutex will act as shared + # even if it was initialized with a 'private' mutexattr. + if self.kind & PTHREAD_MUTEX_PSHARED_BIT: + self.values.append(('Shared', 'Yes')) + else: + self.values.append(('Shared', 'No')) + + if self.kind & PTHREAD_MUTEX_PRIO_INHERIT_NP: + self.values.append(('Protocol', 'Priority inherit')) + elif self.kind & PTHREAD_MUTEX_PRIO_PROTECT_NP: + prio_ceiling = ((self.lock & PTHREAD_MUTEX_PRIO_CEILING_MASK) + >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT) + + self.values.append(('Protocol', 'Priority protect')) + self.values.append(('Priority ceiling', prio_ceiling)) + else: + # PTHREAD_PRIO_NONE + self.values.append(('Protocol', 'None')) + + def read_misc_info(self): + """Read miscellaneous info on the mutex. + + For now this reads the number of times a recursive mutex was locked + by the same thread. + """ + + mutex_type = self.kind & PTHREAD_MUTEX_KIND_MASK + + if mutex_type == PTHREAD_MUTEX_RECURSIVE and self.count > 1: + self.values.append(('Times locked recursively', self.count)) + +class MutexAttributesPrinter(object): + """Pretty printer for pthread_mutexattr_t. + + In the NPTL this is a type that's always casted to struct pthread_mutexattr + which has a single 'mutexkind' field containing the actual attributes. + """ + + def __init__(self, mutexattr): + """Initialize the printer's internal data structures. + + Args: + mutexattr: A gdb.value representing a pthread_mutexattr_t. + """ + + self.values = [] + + try: + mutexattr_struct = gdb.lookup_type('struct pthread_mutexattr') + self.mutexattr = mutexattr.cast(mutexattr_struct)['mutexkind'] + self.read_values() + except gdb.error: + # libpthread doesn't have debug symbols, thus we can't find the + # real struct type. Just print the union members. + self.values.append(('__size', mutexattr['__size'])) + self.values.append(('__align', mutexattr['__align'])) + + def to_string(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_mutexattr_t. + """ + + return 'pthread_mutexattr_t' + + def children(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_mutexattr_t. + """ + + return self.values + + def read_values(self): + """Read the mutexattr's info and store it in self.values. + + The data contained in self.values will be returned by the Iterator + created in self.children. + """ + + mutexattr_type = (self.mutexattr + & ~PTHREAD_MUTEXATTR_FLAG_BITS + & ~PTHREAD_MUTEX_NO_ELISION_NP) + + # mutexattr_type must be casted to int because it's a gdb.Value + self.values.append(MUTEX_TYPES[int(mutexattr_type)]) + + if self.mutexattr & PTHREAD_MUTEXATTR_FLAG_ROBUST: + self.values.append(('Robust', 'Yes')) + else: + self.values.append(('Robust', 'No')) + + if self.mutexattr & PTHREAD_MUTEXATTR_FLAG_PSHARED: + self.values.append(('Shared', 'Yes')) + else: + self.values.append(('Shared', 'No')) + + protocol = ((self.mutexattr & PTHREAD_MUTEXATTR_PROTOCOL_MASK) >> + PTHREAD_MUTEXATTR_PROTOCOL_SHIFT) + + if protocol == PTHREAD_PRIO_NONE: + self.values.append(('Protocol', 'None')) + elif protocol == PTHREAD_PRIO_INHERIT: + self.values.append(('Protocol', 'Priority inherit')) + elif protocol == PTHREAD_PRIO_PROTECT: + self.values.append(('Protocol', 'Priority protect')) + +CLOCK_IDS = { + CLOCK_REALTIME: 'CLOCK_REALTIME', + CLOCK_MONOTONIC: 'CLOCK_MONOTONIC', + CLOCK_PROCESS_CPUTIME_ID: 'CLOCK_PROCESS_CPUTIME_ID', + CLOCK_THREAD_CPUTIME_ID: 'CLOCK_THREAD_CPUTIME_ID', + CLOCK_MONOTONIC_RAW: 'CLOCK_MONOTONIC_RAW', + CLOCK_REALTIME_COARSE: 'CLOCK_REALTIME_COARSE', + CLOCK_MONOTONIC_COARSE: 'CLOCK_MONOTONIC_COARSE' +} + +class ConditionVariablePrinter(object): + """Pretty printer for pthread_cond_t.""" + + def __init__(self, cond): + """Initialize the printer's internal data structures. + + Args: + cond: A gdb.value representing a pthread_cond_t. + """ + + # Since PTHREAD_COND_SHARED is an integer, we need to cast it to void * + # to be able to compare it to the condvar's __data.__mutex member. + # + # While it looks like self.shared_value should be a class variable, + # that would result in it having an incorrect size if we're loading + # these printers through .gdbinit for a 64-bit objfile in AMD64. + # This is because gdb initially assumes the pointer size to be 4 bytes, + # and only sets it to 8 after loading the 64-bit objfiles. Since + # .gdbinit runs before any objfiles are loaded, this would effectively + # make self.shared_value have a size of 4, thus breaking later + # comparisons with pointers whose types are looked up at runtime. + void_ptr_type = gdb.lookup_type('void').pointer() + self.shared_value = gdb.Value(PTHREAD_COND_SHARED).cast(void_ptr_type) + + data = cond['__data'] + self.total_seq = data['__total_seq'] + self.mutex = data['__mutex'] + self.nwaiters = data['__nwaiters'] + self.values = [] + + self.read_values() + + def to_string(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_cond_t. + """ + + return 'pthread_cond_t' + + def children(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_cond_t. + """ + + return self.values + + def read_values(self): + """Read the condvar's info and store it in self.values. + + The data contained in self.values will be returned by the Iterator + created in self.children. + """ + + self.read_status() + self.read_attributes() + self.read_mutex_info() + + def read_status(self): + """Read the status of the condvar. + + This method reads whether the condvar is destroyed and how many threads + are waiting for it. + """ + + if self.total_seq == PTHREAD_COND_DESTROYED: + self.values.append(('Status', 'Destroyed')) + + self.values.append(('Threads waiting for this condvar', + self.nwaiters >> COND_NWAITERS_SHIFT)) + + def read_attributes(self): + """Read the condvar's attributes.""" + + clock_id = self.nwaiters & ((1 << COND_NWAITERS_SHIFT) - 1) + + # clock_id must be casted to int because it's a gdb.Value + self.values.append(('Clock ID', CLOCK_IDS[int(clock_id)])) + + shared = (self.mutex == self.shared_value) + + if shared: + self.values.append(('Shared', 'Yes')) + else: + self.values.append(('Shared', 'No')) + + def read_mutex_info(self): + """Read the data of the mutex this condvar is bound to. + + A pthread_cond_t's __data.__mutex member is a void * which + must be casted to pthread_mutex_t *. For shared condvars, this + member isn't recorded and has a special value instead. + """ + + if self.mutex and self.mutex != self.shared_value: + mutex_type = gdb.lookup_type('pthread_mutex_t') + mutex = self.mutex.cast(mutex_type.pointer()).dereference() + + self.values.append(('Mutex', mutex)) + +class ConditionVariableAttributesPrinter(object): + """Pretty printer for pthread_condattr_t. + + In the NPTL this is a type that's always casted to struct pthread_condattr, + which has a single 'value' field containing the actual attributes. + """ + + def __init__(self, condattr): + """Initialize the printer's internal data structures. + + Args: + condattr: A gdb.value representing a pthread_condattr_t. + """ + + self.values = [] + + try: + condattr_struct = gdb.lookup_type('struct pthread_condattr') + self.condattr = condattr.cast(condattr_struct)['value'] + self.read_values() + except gdb.error: + # libpthread doesn't have debug symbols, thus we can't find the + # real struct type. Just print the union members. + self.values.append(('__size', condattr['__size'])) + self.values.append(('__align', condattr['__align'])) + + def to_string(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_condattr_t. + """ + + return 'pthread_condattr_t' + + def children(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_condattr_t. + """ + + return self.values + + def read_values(self): + """Read the condattr's info and store it in self.values. + + The data contained in self.values will be returned by the Iterator + created in self.children. + """ + + clock_id = self.condattr & ((1 << COND_NWAITERS_SHIFT) - 1) + + # clock_id must be casted to int because it's a gdb.Value + self.values.append(('Clock ID', CLOCK_IDS[int(clock_id)])) + + if self.condattr & 1: + self.values.append(('Shared', 'Yes')) + else: + self.values.append(('Shared', 'No')) + +class RWLockPrinter(object): + """Pretty printer for pthread_rwlock_t.""" + + def __init__(self, rwlock): + """Initialize the printer's internal data structures. + + Args: + rwlock: A gdb.value representing a pthread_rwlock_t. + """ + + data = rwlock['__data'] + self.readers = data['__nr_readers'] + self.queued_readers = data['__nr_readers_queued'] + self.queued_writers = data['__nr_writers_queued'] + self.writer_id = data['__writer'] + self.shared = data['__shared'] + self.prefers_writers = data['__flags'] + self.values = [] + self.read_values() + + def to_string(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_rwlock_t. + """ + + return 'pthread_rwlock_t' + + def children(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_rwlock_t. + """ + + return self.values + + def read_values(self): + """Read the rwlock's info and store it in self.values. + + The data contained in self.values will be returned by the Iterator + created in self.children. + """ + + self.read_status() + self.read_attributes() + + def read_status(self): + """Read the status of the rwlock.""" + + # Right now pthread_rwlock_destroy doesn't do anything, so there's no + # way to check if an rwlock is destroyed. + + if self.writer_id: + self.values.append(('Status', 'Locked (Write)')) + self.values.append(('Writer ID', self.writer_id)) + elif self.readers: + self.values.append(('Status', 'Locked (Read)')) + self.values.append(('Readers', self.readers)) + else: + self.values.append(('Status', 'Unlocked')) + + self.values.append(('Queued readers', self.queued_readers)) + self.values.append(('Queued writers', self.queued_writers)) + + def read_attributes(self): + """Read the attributes of the rwlock.""" + + if self.shared: + self.values.append(('Shared', 'Yes')) + else: + self.values.append(('Shared', 'No')) + + if self.prefers_writers: + self.values.append(('Prefers', 'Writers')) + else: + self.values.append(('Prefers', 'Readers')) + +class RWLockAttributesPrinter(object): + """Pretty printer for pthread_rwlockattr_t. + + In the NPTL this is a type that's always casted to + struct pthread_rwlockattr, which has two fields ('lockkind' and 'pshared') + containing the actual attributes. + """ + + def __init__(self, rwlockattr): + """Initialize the printer's internal data structures. + + Args: + rwlockattr: A gdb.value representing a pthread_rwlockattr_t. + """ + + self.values = [] + + try: + rwlockattr_struct = gdb.lookup_type('struct pthread_rwlockattr') + self.rwlockattr = rwlockattr.cast(rwlockattr_struct) + self.read_values() + except gdb.error: + # libpthread doesn't have debug symbols, thus we can't find the + # real struct type. Just print the union members. + self.values.append(('__size', rwlockattr['__size'])) + self.values.append(('__align', rwlockattr['__align'])) + + def to_string(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_rwlockattr_t. + """ + + return 'pthread_rwlockattr_t' + + def children(self): + """gdb API function. + + This is called from gdb when we try to print a pthread_rwlockattr_t. + """ + + return self.values + + def read_values(self): + """Read the rwlockattr's info and store it in self.values. + + The data contained in self.values will be returned by the Iterator + created in self.children. + """ + + rwlock_type = self.rwlockattr['lockkind'] + shared = self.rwlockattr['pshared'] + + if shared == PTHREAD_PROCESS_SHARED: + self.values.append(('Shared', 'Yes')) + else: + # PTHREAD_PROCESS_PRIVATE + self.values.append(('Shared', 'No')) + + if (rwlock_type == PTHREAD_RWLOCK_PREFER_READER_NP or + rwlock_type == PTHREAD_RWLOCK_PREFER_WRITER_NP): + # This is a known bug. Using PTHREAD_RWLOCK_PREFER_WRITER_NP will + # still make the rwlock prefer readers. + self.values.append(('Prefers', 'Readers')) + elif rwlock_type == PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP: + self.values.append(('Prefers', 'Writers')) + +def register(objfile): + """Register the pretty printers within the given objfile.""" + + printer = gdb.printing.RegexpCollectionPrettyPrinter('glibc-pthread-locks') + + printer.add_printer('pthread_mutex_t', r'^pthread_mutex_t$', + MutexPrinter) + printer.add_printer('pthread_mutexattr_t', r'^pthread_mutexattr_t$', + MutexAttributesPrinter) + printer.add_printer('pthread_cond_t', r'^pthread_cond_t$', + ConditionVariablePrinter) + printer.add_printer('pthread_condattr_t', r'^pthread_condattr_t$', + ConditionVariableAttributesPrinter) + printer.add_printer('pthread_rwlock_t', r'^pthread_rwlock_t$', + RWLockPrinter) + printer.add_printer('pthread_rwlockattr_t', r'^pthread_rwlockattr_t$', + RWLockAttributesPrinter) + + if objfile == None: + objfile = gdb + + gdb.printing.register_pretty_printer(objfile, printer) + +register(gdb.current_objfile()) diff --git a/nptl/nptl_lock_constants.pysym b/nptl/nptl_lock_constants.pysym new file mode 100644 index 0000000..303ec61 --- /dev/null +++ b/nptl/nptl_lock_constants.pysym @@ -0,0 +1,75 @@ +#include <pthreadP.h> + +-- Mutex types +PTHREAD_MUTEX_KIND_MASK PTHREAD_MUTEX_KIND_MASK_NP +PTHREAD_MUTEX_NORMAL +PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE_NP +PTHREAD_MUTEX_ERRORCHECK PTHREAD_MUTEX_ERRORCHECK_NP +PTHREAD_MUTEX_ADAPTIVE_NP + +-- Mutex status +-- These are hardcoded all over the code; there are no enums/macros for them. +PTHREAD_MUTEX_DESTROYED -1 +PTHREAD_MUTEX_UNLOCKED 0 +PTHREAD_MUTEX_LOCKED_NO_WAITERS 1 + +-- For robust mutexes +PTHREAD_MUTEX_INCONSISTENT +PTHREAD_MUTEX_NOTRECOVERABLE +FUTEX_OWNER_DIED + +-- For robust and PI mutexes +FUTEX_WAITERS +FUTEX_TID_MASK + +-- Mutex attributes +PTHREAD_MUTEX_ROBUST_NORMAL_NP +PTHREAD_MUTEX_PRIO_INHERIT_NP +PTHREAD_MUTEX_PRIO_PROTECT_NP +PTHREAD_MUTEX_PSHARED_BIT +PTHREAD_MUTEX_PRIO_CEILING_SHIFT +PTHREAD_MUTEX_PRIO_CEILING_MASK + +-- Mutex attribute flags +PTHREAD_MUTEXATTR_PROTOCOL_SHIFT +PTHREAD_MUTEXATTR_PROTOCOL_MASK +PTHREAD_MUTEXATTR_PRIO_CEILING_MASK +PTHREAD_MUTEXATTR_FLAG_ROBUST +PTHREAD_MUTEXATTR_FLAG_PSHARED +PTHREAD_MUTEXATTR_FLAG_BITS +PTHREAD_MUTEX_NO_ELISION_NP + +-- Priority protocols +PTHREAD_PRIO_NONE +PTHREAD_PRIO_INHERIT +PTHREAD_PRIO_PROTECT + +-- These values are hardcoded as well: +-- Value of __mutex for shared condvars. +PTHREAD_COND_SHARED (void *)~0l + +-- Value of __total_seq for destroyed condvars. +PTHREAD_COND_DESTROYED -1ull + +-- __nwaiters encodes the number of threads waiting on a condvar +-- and the clock ID. +-- __nwaiters >> COND_NWAITERS_SHIFT gives us the number of waiters. +COND_NWAITERS_SHIFT + +-- Condvar clock IDs +CLOCK_REALTIME +CLOCK_MONOTONIC +CLOCK_PROCESS_CPUTIME_ID +CLOCK_THREAD_CPUTIME_ID +CLOCK_MONOTONIC_RAW +CLOCK_REALTIME_COARSE +CLOCK_MONOTONIC_COARSE + +-- Rwlock attributes +PTHREAD_RWLOCK_PREFER_READER_NP +PTHREAD_RWLOCK_PREFER_WRITER_NP +PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP + +-- 'Shared' attribute values +PTHREAD_PROCESS_PRIVATE +PTHREAD_PROCESS_SHARED diff --git a/nptl/test-cond-printers.c b/nptl/test-cond-printers.c new file mode 100644 index 0000000..0f2a5f4 --- /dev/null +++ b/nptl/test-cond-printers.c @@ -0,0 +1,57 @@ +/* Helper program for testing the pthread_cond_t pretty printer. + + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Keep the calls to the pthread_* functions on separate lines to make it easy + to advance through the program using the gdb 'next' command. */ + +#include <time.h> +#include <pthread.h> + +#define PASS 0 +#define FAIL 1 + +static int test_status_destroyed (pthread_cond_t *condvar); + +int +main (void) +{ + pthread_cond_t condvar; + pthread_condattr_t attr; + int result = FAIL; + + if (pthread_condattr_init (&attr) == 0 + && test_status_destroyed (&condvar) == PASS) + result = PASS; + /* Else, one of the pthread_cond* functions failed. */ + + return result; +} + +/* Initializes CONDVAR, then destroys it. */ +static int +test_status_destroyed (pthread_cond_t *condvar) +{ + int result = FAIL; + + if (pthread_cond_init (condvar, NULL) == 0 + && pthread_cond_destroy (condvar) == 0) + result = PASS; /* Test status (destroyed). */ + + return result; +} diff --git a/nptl/test-cond-printers.py b/nptl/test-cond-printers.py new file mode 100644 index 0000000..af0e12e --- /dev/null +++ b/nptl/test-cond-printers.py @@ -0,0 +1,50 @@ +# Common tests for the ConditionVariablePrinter class. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +import sys + +from test_printers_common import * + +test_source = sys.argv[1] +test_bin = sys.argv[2] +printer_files = sys.argv[3:] +printer_names = ['global glibc-pthread-locks'] + +try: + init_test(test_bin, printer_files, printer_names) + go_to_main() + + var = 'condvar' + to_string = 'pthread_cond_t' + + break_at(test_source, 'Test status (destroyed)') + continue_cmd() # Go to test_status_destroyed + test_printer(var, to_string, {'Status': 'Destroyed'}) + + continue_cmd() # Exit + +except (NoLineError, pexpect.TIMEOUT) as exception: + print('Error: {0}'.format(exception)) + result = FAIL + +else: + print('Test succeeded.') + result = PASS + +exit(result) diff --git a/nptl/test-condattr-printers.c b/nptl/test-condattr-printers.c new file mode 100644 index 0000000..4db4098 --- /dev/null +++ b/nptl/test-condattr-printers.c @@ -0,0 +1,94 @@ +/* Helper program for testing the pthread_cond_t and pthread_condattr_t + pretty printers. + + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Keep the calls to the pthread_* functions on separate lines to make it easy + to advance through the program using the gdb 'next' command. */ + +#include <time.h> +#include <pthread.h> + +#define PASS 0 +#define FAIL 1 + +static int condvar_reinit (pthread_cond_t *condvar, + const pthread_condattr_t *attr); +static int test_setclock (pthread_cond_t *condvar, pthread_condattr_t *attr); +static int test_setpshared (pthread_cond_t *condvar, pthread_condattr_t *attr); + +/* Need these so we don't have lines longer than 79 chars. */ +#define SET_SHARED(attr, shared) pthread_condattr_setpshared (attr, shared) + +int +main (void) +{ + pthread_cond_t condvar; + pthread_condattr_t attr; + int result = FAIL; + + if (pthread_condattr_init (&attr) == 0 + && pthread_cond_init (&condvar, NULL) == 0 + && test_setclock (&condvar, &attr) == PASS + && test_setpshared (&condvar, &attr) == PASS) + result = PASS; + /* Else, one of the pthread_cond* functions failed. */ + + return result; +} + +/* Destroys CONDVAR and re-initializes it using ATTR. */ +static int +condvar_reinit (pthread_cond_t *condvar, const pthread_condattr_t *attr) +{ + int result = FAIL; + + if (pthread_cond_destroy (condvar) == 0 + && pthread_cond_init (condvar, attr) == 0) + result = PASS; + + return result; +} + +/* Tests setting the clock ID attribute. */ +static int +test_setclock (pthread_cond_t *condvar, pthread_condattr_t *attr) +{ + int result = FAIL; + + if (pthread_condattr_setclock (attr, CLOCK_REALTIME) == 0 /* Set clock. */ + && condvar_reinit (condvar, attr) == PASS) + result = PASS; + + return result; +} + +/* Tests setting whether the condvar can be shared between processes. */ +static int +test_setpshared (pthread_cond_t *condvar, pthread_condattr_t *attr) +{ + int result = FAIL; + + if (SET_SHARED (attr, PTHREAD_PROCESS_SHARED) == 0 /* Set shared. */ + && condvar_reinit (condvar, attr) == PASS + && SET_SHARED (attr, PTHREAD_PROCESS_PRIVATE) == 0 + && condvar_reinit (condvar, attr) == PASS) + result = PASS; + + return result; +} diff --git a/nptl/test-condattr-printers.py b/nptl/test-condattr-printers.py new file mode 100644 index 0000000..7ea01db --- /dev/null +++ b/nptl/test-condattr-printers.py @@ -0,0 +1,71 @@ +# Common tests for the ConditionVariablePrinter and +# ConditionVariableAttributesPrinter classes. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +import sys + +from test_printers_common import * + +test_source = sys.argv[1] +test_bin = sys.argv[2] +printer_files = sys.argv[3:] +printer_names = ['global glibc-pthread-locks'] + +try: + init_test(test_bin, printer_files, printer_names) + go_to_main() + + check_debug_symbol('struct pthread_condattr') + + condvar_var = 'condvar' + condvar_to_string = 'pthread_cond_t' + + attr_var = 'attr' + attr_to_string = 'pthread_condattr_t' + + break_at(test_source, 'Set clock') + continue_cmd() # Go to test_setclock + next_cmd(2) + test_printer(condvar_var, condvar_to_string, {'Clock ID': 'CLOCK_REALTIME'}) + test_printer(attr_var, attr_to_string, {'Clock ID': 'CLOCK_REALTIME'}) + + break_at(test_source, 'Set shared') + continue_cmd() # Go to test_setpshared + next_cmd(2) + test_printer(condvar_var, condvar_to_string, {'Shared': 'Yes'}) + test_printer(attr_var, attr_to_string, {'Shared': 'Yes'}) + next_cmd(2) + test_printer(condvar_var, condvar_to_string, {'Shared': 'No'}) + test_printer(attr_var, attr_to_string, {'Shared': 'No'}) + + continue_cmd() # Exit + +except (NoLineError, pexpect.TIMEOUT) as exception: + print('Error: {0}'.format(exception)) + result = FAIL + +except DebugError as exception: + print(exception) + result = UNSUPPORTED + +else: + print('Test succeeded.') + result = PASS + +exit(result) diff --git a/nptl/test-mutex-printers.c b/nptl/test-mutex-printers.c new file mode 100644 index 0000000..b973e82 --- /dev/null +++ b/nptl/test-mutex-printers.c @@ -0,0 +1,151 @@ +/* Helper program for testing the pthread_mutex_t pretty printer. + + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Keep the calls to the pthread_* functions on separate lines to make it easy + to advance through the program using the gdb 'next' command. */ + +#include <stdlib.h> +#include <errno.h> +#include <pthread.h> + +#define PASS 0 +#define FAIL 1 + +static int test_status_destroyed (pthread_mutex_t *mutex); +static int test_status_no_robust (pthread_mutex_t *mutex, + pthread_mutexattr_t *attr); +static int test_status_robust (pthread_mutex_t *mutex, + pthread_mutexattr_t *attr); +static int test_locking_state_robust (pthread_mutex_t *mutex); +static void *thread_func (void *arg); +static int test_recursive_locks (pthread_mutex_t *mutex, + pthread_mutexattr_t *attr); + +int +main (void) +{ + pthread_mutex_t mutex; + pthread_mutexattr_t attr; + int result = FAIL; + + if (pthread_mutexattr_init (&attr) == 0 + && test_status_destroyed (&mutex) == PASS + && test_status_no_robust (&mutex, &attr) == PASS + && test_status_robust (&mutex, &attr) == PASS + && test_recursive_locks (&mutex, &attr) == PASS) + result = PASS; + /* Else, one of the pthread_mutex* functions failed. */ + + return result; +} + +/* Initializes MUTEX, then destroys it. */ +static int +test_status_destroyed (pthread_mutex_t *mutex) +{ + int result = FAIL; + + if (pthread_mutex_init (mutex, NULL) == 0 + && pthread_mutex_destroy (mutex) == 0) + result = PASS; /* Test status (destroyed). */ + + return result; +} + +/* Tests locking of non-robust mutexes. */ +static int +test_status_no_robust (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (pthread_mutexattr_setrobust (attr, PTHREAD_MUTEX_STALLED) == 0 + && pthread_mutex_init (mutex, attr) == 0 + && pthread_mutex_lock (mutex) == 0 /* Test status (non-robust). */ + && pthread_mutex_unlock (mutex) == 0 + && pthread_mutex_destroy (mutex) == 0) + result = PASS; + + return result; +} + +/* Tests locking of robust mutexes. */ +static int +test_status_robust (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (pthread_mutexattr_setrobust (attr, PTHREAD_MUTEX_ROBUST) == 0 + && pthread_mutex_init (mutex, attr) == 0 + && test_locking_state_robust (mutex) == PASS /* Test status (robust). */ + && pthread_mutex_destroy (mutex) == 0) + result = PASS; + + return result; +} + +/* Tests locking and state corruption of robust mutexes. We'll mark it as + inconsistent, then not recoverable. */ +static int +test_locking_state_robust (pthread_mutex_t *mutex) +{ + int result = FAIL; + pthread_t thread; + + if (pthread_create (&thread, NULL, thread_func, mutex) == 0 /* Create. */ + && pthread_join (thread, NULL) == 0 + && pthread_mutex_lock (mutex) == EOWNERDEAD /* Test locking (robust). */ + && pthread_mutex_unlock (mutex) == 0) + result = PASS; + + return result; +} + +/* Function to be called by the child thread when testing robust mutexes. */ +static void * +thread_func (void *arg) +{ + pthread_mutex_t *mutex = (pthread_mutex_t *)arg; + + if (pthread_mutex_lock (mutex) != 0) /* Thread function. */ + exit (FAIL); + + /* Thread terminates without unlocking the mutex, thus marking it as + inconsistent. */ + return NULL; +} + +/* Tests locking the mutex multiple times in a row. */ +static int +test_recursive_locks (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (pthread_mutexattr_settype (attr, PTHREAD_MUTEX_RECURSIVE) == 0 + && pthread_mutex_init (mutex, attr) == 0 + && pthread_mutex_lock (mutex) == 0 + && pthread_mutex_lock (mutex) == 0 + && pthread_mutex_lock (mutex) == 0 /* Test recursive locks. */ + && pthread_mutex_unlock (mutex) == 0 + && pthread_mutex_unlock (mutex) == 0 + && pthread_mutex_unlock (mutex) == 0 + && pthread_mutex_destroy (mutex) == 0) + result = PASS; + + return result; +} diff --git a/nptl/test-mutex-printers.py b/nptl/test-mutex-printers.py new file mode 100644 index 0000000..7f542ad --- /dev/null +++ b/nptl/test-mutex-printers.py @@ -0,0 +1,97 @@ +# Tests for the MutexPrinter class. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +import sys + +from test_printers_common import * + +test_source = sys.argv[1] +test_bin = sys.argv[2] +printer_files = sys.argv[3:] +printer_names = ['global glibc-pthread-locks'] + +try: + init_test(test_bin, printer_files, printer_names) + go_to_main() + + var = 'mutex' + to_string = 'pthread_mutex_t' + + break_at(test_source, 'Test status (destroyed)') + continue_cmd() # Go to test_status_destroyed + test_printer(var, to_string, {'Status': 'Destroyed'}) + + break_at(test_source, 'Test status (non-robust)') + continue_cmd() # Go to test_status_no_robust + test_printer(var, to_string, {'Status': 'Unlocked'}) + next_cmd() + thread_id = get_current_thread_lwpid() + test_printer(var, to_string, {'Status': 'Locked, possibly with no waiters', + 'Owner ID': thread_id}) + + break_at(test_source, 'Test status (robust)') + continue_cmd() # Go to test_status_robust + test_printer(var, to_string, {'Status': 'Unlocked'}) + + # We'll now test the robust mutex locking states. We'll create a new + # thread that will lock a robust mutex and exit without unlocking it. + break_at(test_source, 'Create') + continue_cmd() # Go to test_locking_state_robust + # Set a breakpoint for the new thread to hit. + break_at(test_source, 'Thread function') + continue_cmd() + # By now the new thread is created and has hit its breakpoint. + set_scheduler_locking(True) + parent = 1 + child = 2 + select_thread(child) + child_id = get_current_thread_lwpid() + # We've got the new thread's ID. + select_thread(parent) + # Make the new thread finish its function while we wait. + continue_cmd(thread=child) + # The new thread should be dead by now. + break_at(test_source, 'Test locking (robust)') + continue_cmd() + test_printer(var, to_string, {'Owner ID': r'{0} \(dead\)'.format(child_id)}) + # Try to lock and unlock the mutex. + next_cmd() + test_printer(var, to_string, {'Owner ID': thread_id, + 'State protected by this mutex': 'Inconsistent'}) + next_cmd() + test_printer(var, to_string, {'Status': 'Unlocked', + 'State protected by this mutex': 'Not recoverable'}) + set_scheduler_locking(False) + + break_at(test_source, 'Test recursive locks') + continue_cmd() # Go to test_recursive_locks + test_printer(var, to_string, {'Times locked recursively': '2'}) + next_cmd() + test_printer(var, to_string, {'Times locked recursively': '3'}) + continue_cmd() # Exit + +except (NoLineError, pexpect.TIMEOUT) as exception: + print('Error: {0}'.format(exception)) + result = FAIL + +else: + print('Test succeeded.') + result = PASS + +exit(result) diff --git a/nptl/test-mutexattr-printers.c b/nptl/test-mutexattr-printers.c new file mode 100644 index 0000000..9ecfff7 --- /dev/null +++ b/nptl/test-mutexattr-printers.c @@ -0,0 +1,144 @@ +/* Helper program for testing the pthread_mutex_t and pthread_mutexattr_t + pretty printers. + + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Keep the calls to the pthread_* functions on separate lines to make it easy + to advance through the program using the gdb 'next' command. */ + +#include <pthread.h> + +#define PASS 0 +#define FAIL 1 +#define PRIOCEILING 42 + +/* Need these so we don't have lines longer than 79 chars. */ +#define SET_TYPE(attr, type) pthread_mutexattr_settype (attr, type) +#define SET_ROBUST(attr, robust) pthread_mutexattr_setrobust (attr, robust) +#define SET_SHARED(attr, shared) pthread_mutexattr_setpshared (attr, shared) +#define SET_PROTOCOL(attr, protocol) \ + pthread_mutexattr_setprotocol (attr, protocol) +#define SET_PRIOCEILING(mutex, prioceiling, old_ceiling) \ + pthread_mutex_setprioceiling (mutex, prioceiling, old_ceiling) + +static int mutex_reinit (pthread_mutex_t *mutex, + const pthread_mutexattr_t *attr); +static int test_settype (pthread_mutex_t *mutex, pthread_mutexattr_t *attr); +static int test_setrobust (pthread_mutex_t *mutex, pthread_mutexattr_t *attr); +static int test_setpshared (pthread_mutex_t *mutex, pthread_mutexattr_t *attr); +static int test_setprotocol (pthread_mutex_t *mutex, + pthread_mutexattr_t *attr); + +int +main (void) +{ + pthread_mutex_t mutex; + pthread_mutexattr_t attr; + int result = FAIL; + + if (pthread_mutexattr_init (&attr) == 0 + && pthread_mutex_init (&mutex, NULL) == 0 + && test_settype (&mutex, &attr) == PASS + && test_setrobust (&mutex, &attr) == PASS + && test_setpshared (&mutex, &attr) == PASS + && test_setprotocol (&mutex, &attr) == PASS) + result = PASS; + /* Else, one of the pthread_mutex* functions failed. */ + + return result; +} + +/* Destroys MUTEX and re-initializes it using ATTR. */ +static int +mutex_reinit (pthread_mutex_t *mutex, const pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (pthread_mutex_destroy (mutex) == 0 + && pthread_mutex_init (mutex, attr) == 0) + result = PASS; + + return result; +} + +/* Tests setting the mutex type. */ +static int +test_settype (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (SET_TYPE (attr, PTHREAD_MUTEX_ERRORCHECK) == 0 /* Set type. */ + && mutex_reinit (mutex, attr) == 0 + && SET_TYPE (attr, PTHREAD_MUTEX_RECURSIVE) == 0 + && mutex_reinit (mutex, attr) == 0 + && SET_TYPE (attr, PTHREAD_MUTEX_NORMAL) == 0 + && mutex_reinit (mutex, attr) == 0) + result = PASS; + + return result; +} + +/* Tests setting whether the mutex is robust. */ +static int +test_setrobust (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (SET_ROBUST (attr, PTHREAD_MUTEX_ROBUST) == 0 /* Set robust. */ + && mutex_reinit (mutex, attr) == 0 + && SET_ROBUST (attr, PTHREAD_MUTEX_STALLED) == 0 + && mutex_reinit (mutex, attr) == 0) + result = PASS; + + return result; +} + +/* Tests setting whether the mutex can be shared between processes. */ +static int +test_setpshared (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + + if (SET_SHARED (attr, PTHREAD_PROCESS_SHARED) == 0 /* Set shared. */ + && mutex_reinit (mutex, attr) == 0 + && SET_SHARED (attr, PTHREAD_PROCESS_PRIVATE) == 0 + && mutex_reinit (mutex, attr) == 0) + result = PASS; + + return result; +} + +/* Tests setting the mutex protocol and, for Priority Protect, the Priority + Ceiling. */ +static int +test_setprotocol (pthread_mutex_t *mutex, pthread_mutexattr_t *attr) +{ + int result = FAIL; + int old_prioceiling; + + if (SET_PROTOCOL (attr, PTHREAD_PRIO_INHERIT) == 0 /* Set protocol. */ + && mutex_reinit (mutex, attr) == 0 + && SET_PROTOCOL (attr, PTHREAD_PRIO_PROTECT) == 0 + && mutex_reinit (mutex, attr) == 0 + && SET_PRIOCEILING(mutex, PRIOCEILING, &old_prioceiling) == 0 + && SET_PROTOCOL (attr, PTHREAD_PRIO_NONE) == 0 + && mutex_reinit (mutex, attr) == 0) + result = PASS; + + return result; +} diff --git a/nptl/test-mutexattr-printers.py b/nptl/test-mutexattr-printers.py new file mode 100644 index 0000000..4464723 --- /dev/null +++ b/nptl/test-mutexattr-printers.py @@ -0,0 +1,101 @@ +# Common tests for the MutexPrinter and MutexAttributesPrinter classes. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +import sys + +from test_printers_common import * + +test_source = sys.argv[1] +test_bin = sys.argv[2] +printer_files = sys.argv[3:] +printer_names = ['global glibc-pthread-locks'] +PRIOCEILING = 42 + +try: + init_test(test_bin, printer_files, printer_names) + go_to_main() + + check_debug_symbol('struct pthread_mutexattr') + + mutex_var = 'mutex' + mutex_to_string = 'pthread_mutex_t' + + attr_var = 'attr' + attr_to_string = 'pthread_mutexattr_t' + + break_at(test_source, 'Set type') + continue_cmd() # Go to test_settype + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Type': 'Error check'}) + test_printer(mutex_var, mutex_to_string, {'Type': 'Error check'}) + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Type': 'Recursive'}) + test_printer(mutex_var, mutex_to_string, {'Type': 'Recursive'}) + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Type': 'Normal'}) + test_printer(mutex_var, mutex_to_string, {'Type': 'Normal'}) + + break_at(test_source, 'Set robust') + continue_cmd() # Go to test_setrobust + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Robust': 'Yes'}) + test_printer(mutex_var, mutex_to_string, {'Robust': 'Yes'}) + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Robust': 'No'}) + test_printer(mutex_var, mutex_to_string, {'Robust': 'No'}) + + break_at(test_source, 'Set shared') + continue_cmd() # Go to test_setpshared + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Shared': 'Yes'}) + test_printer(mutex_var, mutex_to_string, {'Shared': 'Yes'}) + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Shared': 'No'}) + test_printer(mutex_var, mutex_to_string, {'Shared': 'No'}) + + break_at(test_source, 'Set protocol') + continue_cmd() # Go to test_setprotocol + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Protocol': 'Priority inherit'}) + test_printer(mutex_var, mutex_to_string, {'Protocol': 'Priority inherit'}) + next_cmd(2) + test_printer(attr_var, attr_to_string, {'Protocol': 'Priority protect'}) + test_printer(mutex_var, mutex_to_string, {'Protocol': 'Priority protect'}) + next_cmd(2) + test_printer(mutex_var, mutex_to_string, {'Priority ceiling': + str(PRIOCEILING)}) + next_cmd() + test_printer(attr_var, attr_to_string, {'Protocol': 'None'}) + test_printer(mutex_var, mutex_to_string, {'Protocol': 'None'}) + + continue_cmd() # Exit + +except (NoLineError, pexpect.TIMEOUT) as exception: + print('Error: {0}'.format(exception)) + result = FAIL + +except DebugError as exception: + print(exception) + result = UNSUPPORTED + +else: + print('Test succeeded.') + result = PASS + +exit(result) diff --git a/nptl/test-rwlock-printers.c b/nptl/test-rwlock-printers.c new file mode 100644 index 0000000..dbbe9b8 --- /dev/null +++ b/nptl/test-rwlock-printers.c @@ -0,0 +1,78 @@ +/* Helper program for testing the pthread_rwlock_t pretty printer. + + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Keep the calls to the pthread_* functions on separate lines to make it easy + to advance through the program using the gdb 'next' command. */ + +#include <pthread.h> + +#define PASS 0 +#define FAIL 1 + +static int test_locking_reader (pthread_rwlock_t *rwlock); +static int test_locking_writer (pthread_rwlock_t *rwlock); + +int +main (void) +{ + pthread_rwlock_t rwlock; + + int result = FAIL; + + if (test_locking_reader (&rwlock) == PASS + && test_locking_writer (&rwlock) == PASS) + result = PASS; + /* Else, one of the pthread_rwlock* functions failed. */ + + return result; +} + +/* Tests locking the rwlock multiple times as a reader. */ +static int +test_locking_reader (pthread_rwlock_t *rwlock) +{ + int result = FAIL; + + if (pthread_rwlock_init (rwlock, NULL) == 0 + && pthread_rwlock_rdlock (rwlock) == 0 /* Test locking (reader). */ + && pthread_rwlock_rdlock (rwlock) == 0 + && pthread_rwlock_rdlock (rwlock) == 0 + && pthread_rwlock_unlock (rwlock) == 0 + && pthread_rwlock_unlock (rwlock) == 0 + && pthread_rwlock_unlock (rwlock) == 0 + && pthread_rwlock_destroy (rwlock) == 0) + result = PASS; + + return result; +} + +/* Tests locking the rwlock as a writer. */ +static int +test_locking_writer (pthread_rwlock_t *rwlock) +{ + int result = FAIL; + + if (pthread_rwlock_init (rwlock, NULL) == 0 + && pthread_rwlock_wrlock (rwlock) == 0 /* Test locking (writer). */ + && pthread_rwlock_unlock (rwlock) == 0 + && pthread_rwlock_destroy (rwlock) == 0) + result = PASS; + + return result; +} diff --git a/nptl/test-rwlock-printers.py b/nptl/test-rwlock-printers.py new file mode 100644 index 0000000..b972fa6 --- /dev/null +++ b/nptl/test-rwlock-printers.py @@ -0,0 +1,64 @@ +# Common tests for the RWLockPrinter class. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +import sys + +from test_printers_common import * + +test_source = sys.argv[1] +test_bin = sys.argv[2] +printer_files = sys.argv[3:] +printer_names = ['global glibc-pthread-locks'] + +try: + init_test(test_bin, printer_files, printer_names) + go_to_main() + + var = 'rwlock' + to_string = 'pthread_rwlock_t' + + break_at(test_source, 'Test locking (reader)') + continue_cmd() # Go to test_locking_reader + test_printer(var, to_string, {'Status': 'Unlocked'}) + next_cmd() + test_printer(var, to_string, {'Status': r'Locked \(Read\)', 'Readers': '1'}) + next_cmd() + test_printer(var, to_string, {'Readers': '2'}) + next_cmd() + test_printer(var, to_string, {'Readers': '3'}) + + break_at(test_source, 'Test locking (writer)') + continue_cmd() # Go to test_locking_writer + test_printer(var, to_string, {'Status': 'Unlocked'}) + next_cmd() + thread_id = get_current_thread_lwpid() + test_printer(var, to_string, {'Status': r'Locked \(Write\)', + 'Writer ID': thread_id}) + + continue_cmd() # Exit + +except (NoLineError, pexpect.TIMEOUT) as exception: + print('Error: {0}'.format(exception)) + result = FAIL + +else: + print('Test succeeded.') + result = PASS + +exit(result) diff --git a/nptl/test-rwlockattr-printers.c b/nptl/test-rwlockattr-printers.c new file mode 100644 index 0000000..d12facf --- /dev/null +++ b/nptl/test-rwlockattr-printers.c @@ -0,0 +1,98 @@ +/* Helper program for testing the pthread_rwlock_t and pthread_rwlockattr_t + pretty printers. + + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Keep the calls to the pthread_* functions on separate lines to make it easy + to advance through the program using the gdb 'next' command. */ + +#include <pthread.h> + +#define PASS 0 +#define FAIL 1 + +/* Need these so we don't have lines longer than 79 chars. */ +#define SET_KIND(attr, kind) pthread_rwlockattr_setkind_np (attr, kind) +#define SET_SHARED(attr, shared) pthread_rwlockattr_setpshared (attr, shared) + +static int rwlock_reinit (pthread_rwlock_t *rwlock, + const pthread_rwlockattr_t *attr); +static int test_setkind_np (pthread_rwlock_t *rwlock, + pthread_rwlockattr_t *attr); +static int test_setpshared (pthread_rwlock_t *rwlock, + pthread_rwlockattr_t *attr); + +int +main (void) +{ + pthread_rwlock_t rwlock; + pthread_rwlockattr_t attr; + int result = FAIL; + + if (pthread_rwlockattr_init (&attr) == 0 + && pthread_rwlock_init (&rwlock, NULL) == 0 + && test_setkind_np (&rwlock, &attr) == PASS + && test_setpshared (&rwlock, &attr) == PASS) + result = PASS; + /* Else, one of the pthread_rwlock* functions failed. */ + + return result; +} + +/* Destroys RWLOCK and re-initializes it using ATTR. */ +static int +rwlock_reinit (pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr) +{ + int result = FAIL; + + if (pthread_rwlock_destroy (rwlock) == 0 + && pthread_rwlock_init (rwlock, attr) == 0) + result = PASS; + + return result; +} + +/* Tests setting whether the rwlock prefers readers or writers. */ +static int +test_setkind_np (pthread_rwlock_t *rwlock, pthread_rwlockattr_t *attr) +{ + int result = FAIL; + + if (SET_KIND (attr, PTHREAD_RWLOCK_PREFER_READER_NP) == 0 /* Set kind. */ + && rwlock_reinit (rwlock, attr) == PASS + && SET_KIND (attr, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP) == 0 + && rwlock_reinit (rwlock, attr) == PASS) + result = PASS; + + return result; +} + +/* Tests setting whether the rwlock can be shared between processes. */ +static int +test_setpshared (pthread_rwlock_t *rwlock, pthread_rwlockattr_t *attr) +{ + int result = FAIL; + + if (SET_SHARED (attr, PTHREAD_PROCESS_SHARED) == 0 /* Set shared. */ + && rwlock_reinit (rwlock, attr) == PASS + && SET_SHARED (attr, PTHREAD_PROCESS_PRIVATE) == 0 + && rwlock_reinit (rwlock, attr) == PASS) + result = PASS; + + return result; +} diff --git a/nptl/test-rwlockattr-printers.py b/nptl/test-rwlockattr-printers.py new file mode 100644 index 0000000..1ca2dc6 --- /dev/null +++ b/nptl/test-rwlockattr-printers.py @@ -0,0 +1,73 @@ +# Common tests for the RWLockPrinter and RWLockAttributesPrinter classes. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +import sys + +from test_printers_common import * + +test_source = sys.argv[1] +test_bin = sys.argv[2] +printer_files = sys.argv[3:] +printer_names = ['global glibc-pthread-locks'] + +try: + init_test(test_bin, printer_files, printer_names) + go_to_main() + + check_debug_symbol('struct pthread_rwlockattr') + + rwlock_var = 'rwlock' + rwlock_to_string = 'pthread_rwlock_t' + + attr_var = 'attr' + attr_to_string = 'pthread_rwlockattr_t' + + break_at(test_source, 'Set kind') + continue_cmd() # Go to test_setkind_np + next_cmd(2) + test_printer(rwlock_var, rwlock_to_string, {'Prefers': 'Readers'}) + test_printer(attr_var, attr_to_string, {'Prefers': 'Readers'}) + next_cmd(2) + test_printer(rwlock_var, rwlock_to_string, {'Prefers': 'Writers'}) + test_printer(attr_var, attr_to_string, {'Prefers': 'Writers'}) + + break_at(test_source, 'Set shared') + continue_cmd() # Go to test_setpshared + next_cmd(2) + test_printer(rwlock_var, rwlock_to_string, {'Shared': 'Yes'}) + test_printer(attr_var, attr_to_string, {'Shared': 'Yes'}) + next_cmd(2) + test_printer(rwlock_var, rwlock_to_string, {'Shared': 'No'}) + test_printer(attr_var, attr_to_string, {'Shared': 'No'}) + + continue_cmd() # Exit + +except (NoLineError, pexpect.TIMEOUT) as exception: + print('Error: {0}'.format(exception)) + result = FAIL + +except DebugError as exception: + print(exception) + result = UNSUPPORTED + +else: + print('Test succeeded.') + result = PASS + +exit(result) diff --git a/scripts/gen-py-const.awk b/scripts/gen-py-const.awk new file mode 100644 index 0000000..4586f59 --- /dev/null +++ b/scripts/gen-py-const.awk @@ -0,0 +1,118 @@ +# Script to generate constants for Python pretty printers. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +# This script is a smaller version of the clever gen-asm-const.awk hack used to +# generate ASM constants from .sym files. We'll use this to generate constants +# for Python pretty printers. +# +# The input to this script are .pysym files that look like: +# #C_Preprocessor_Directive... +# NAME1 +# NAME2 expression... +# +# A line giving just a name implies an expression consisting of just that name. +# Comments start with '--'. +# +# The output of this script is a 'dummy' function containing 'asm' declarations +# for each non-preprocessor line in the .pysym file. The expression values +# will appear as input operands to the 'asm' declaration. For example, if we +# have: +# +# /* header.h */ +# #define MACRO 42 +# +# struct S { +# char c1; +# char c2; +# char c3; +# }; +# +# enum E { +# ZERO, +# ONE +# }; +# +# /* symbols.pysym */ +# #include <stddef.h> +# #include "header.h" +# -- This is a comment +# MACRO +# C3_OFFSET offsetof(struct S, c3) +# E_ONE ONE +# +# the output will be: +# +# #include <stddef.h> +# #include "header.h" +# void dummy(void) +# { +# asm ("@name@MACRO@value@%0@" : : "i" (MACRO)); +# asm ("@name@C3_OFFSET@value@%0@" : : "i" (offsetof(struct S, c3))); +# asm ("@name@E_ONE@value@%0@" : : "i" (ONE)); +# } +# +# We'll later feed this output to gcc -S. Since '-S' tells gcc to compile but +# not assemble, gcc will output something like: +# +# dummy: +# ... +# @name@MACRO@value@$42@ +# @name@C3_OFFSET@value@$2@ +# @name@E_ONE@value@$1@ +# +# Finally, we can process that output to extract the constant values. +# Notice gcc may prepend a special character such as '$' to each value. + +# found_symbol indicates whether we found a non-comment, non-preprocessor line. +BEGIN { found_symbol = 0 } + +# C preprocessor directives go straight through. +/^#/ { print; next; } + +# Skip comments. +/--/ { next; } + +# Trim leading whitespace. +{ sub(/^[[:blank:]]*/, ""); } + +# If we found a non-comment, non-preprocessor line, print the 'dummy' function +# header. +NF > 0 && !found_symbol { + print "void dummy(void)\n{"; + found_symbol = 1; +} + +# If the line contains just a name, duplicate it so we can use that name +# as the value of the expression. +NF == 1 { sub(/^.*$/, "& &"); } + +# If a line contains a name and an expression... +NF > 1 { + name = $1; + + # Remove any characters before the second field. + sub(/^[^[:blank:]]+[[:blank:]]+/, ""); + + # '$0' ends up being everything that appeared after the first field + # separator. + printf " asm (\"@name@%s@value@%0@\" : : \"i\" (%s));\n", name, $0; +} + +# Close the 'dummy' function. +END { if (found_symbol) print "}"; } diff --git a/scripts/test_printers_common.py b/scripts/test_printers_common.py new file mode 100644 index 0000000..c79d7e3 --- /dev/null +++ b/scripts/test_printers_common.py @@ -0,0 +1,364 @@ +# Common functions and variables for testing the Python pretty printers. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +"""These tests require PExpect 4.0 or newer. + +Exported constants: + PASS, FAIL, UNSUPPORTED (int): Test exit codes, as per evaluate-test.sh. +""" + +import os +import re +from test_printers_exceptions import * + +PASS = 0 +FAIL = 1 +UNSUPPORTED = 77 + +gdb_bin = 'gdb' +gdb_options = '-q -nx' +gdb_invocation = '{0} {1}'.format(gdb_bin, gdb_options) +pexpect_min_version = 4 +gdb_min_version = (7, 8) +encoding = 'utf-8' + +try: + import pexpect +except ImportError: + print('PExpect 4.0 or newer must be installed to test the pretty printers.') + exit(UNSUPPORTED) + +pexpect_version = pexpect.__version__.split('.')[0] + +if int(pexpect_version) < pexpect_min_version: + print('PExpect 4.0 or newer must be installed to test the pretty printers.') + exit(UNSUPPORTED) + +if not pexpect.which(gdb_bin): + print('gdb 7.8 or newer must be installed to test the pretty printers.') + exit(UNSUPPORTED) + +timeout = 5 +TIMEOUTFACTOR = os.environ.get('TIMEOUTFACTOR') + +if TIMEOUTFACTOR: + timeout = int(TIMEOUTFACTOR) + +try: + # Check the gdb version. + version_cmd = '{0} --version'.format(gdb_invocation, timeout=timeout) + gdb_version_out = pexpect.run(version_cmd, encoding=encoding) + + # The gdb version string is "GNU gdb <PKGVERSION><version>", where + # PKGVERSION can be any text. We assume that there'll always be a space + # between PKGVERSION and the version number for the sake of the regexp. + version_match = re.search(r'GNU gdb .* ([1-9]+)\.([0-9]+)', gdb_version_out) + + if not version_match: + print('The gdb version string (gdb -v) is incorrectly formatted.') + exit(UNSUPPORTED) + + gdb_version = (int(version_match.group(1)), int(version_match.group(2))) + + if gdb_version < gdb_min_version: + print('gdb 7.8 or newer must be installed to test the pretty printers.') + exit(UNSUPPORTED) + + # Check if gdb supports Python. + gdb_python_cmd = '{0} -ex "python import os" -batch'.format(gdb_invocation, + timeout=timeout) + gdb_python_error = pexpect.run(gdb_python_cmd, encoding=encoding) + + if gdb_python_error: + print('gdb must have python support to test the pretty printers.') + exit(UNSUPPORTED) + + # If everything's ok, spawn the gdb process we'll use for testing. + gdb = pexpect.spawn(gdb_invocation, echo=False, timeout=timeout, + encoding=encoding) + gdb_prompt = u'\(gdb\)' + gdb.expect(gdb_prompt) + +except pexpect.ExceptionPexpect as exception: + print('Error: {0}'.format(exception)) + exit(FAIL) + +def test(command, pattern=None): + """Sends 'command' to gdb and expects the given 'pattern'. + + If 'pattern' is None, simply consumes everything up to and including + the gdb prompt. + + Args: + command (string): The command we'll send to gdb. + pattern (raw string): A pattern the gdb output should match. + + Returns: + string: The string that matched 'pattern', or an empty string if + 'pattern' was None. + """ + + match = '' + + gdb.sendline(command) + + if pattern: + # PExpect does a non-greedy match for '+' and '*'. Since it can't look + # ahead on the gdb output stream, if 'pattern' ends with a '+' or a '*' + # we may end up matching only part of the required output. + # To avoid this, we'll consume 'pattern' and anything that follows it + # up to and including the gdb prompt, then extract 'pattern' later. + index = gdb.expect([u'{0}.+{1}'.format(pattern, gdb_prompt), + pexpect.TIMEOUT]) + + if index == 0: + # gdb.after now contains the whole match. Extract the text that + # matches 'pattern'. + match = re.match(pattern, gdb.after, re.DOTALL).group() + elif index == 1: + # We got a timeout exception. Print information on what caused it + # and bail out. + error = ('Response does not match the expected pattern.\n' + 'Command: {0}\n' + 'Expected pattern: {1}\n' + 'Response: {2}'.format(command, pattern, gdb.before)) + + raise pexpect.TIMEOUT(error) + else: + # Consume just the the gdb prompt. + gdb.expect(gdb_prompt) + + return match + +def init_test(test_bin, printer_files, printer_names): + """Loads the test binary file and the required pretty printers to gdb. + + Args: + test_bin (string): The name of the test binary file. + pretty_printers (list of strings): A list with the names of the pretty + printer files. + """ + + # Load all the pretty printer files. We're assuming these are safe. + for printer_file in printer_files: + test('source {0}'.format(printer_file)) + + # Disable all the pretty printers. + test('disable pretty-printer', r'0 of [0-9]+ printers enabled') + + # Enable only the required printers. + for printer in printer_names: + test('enable pretty-printer {0}'.format(printer), + r'[1-9][0-9]* of [1-9]+ printers enabled') + + # Finally, load the test binary. + test('file {0}'.format(test_bin)) + +def go_to_main(): + """Executes a gdb 'start' command, which takes us to main.""" + + test('start', r'main') + +def get_line_number(file_name, string): + """Returns the number of the line in which 'string' appears within a file. + + Args: + file_name (string): The name of the file we'll search through. + string (string): The string we'll look for. + + Returns: + int: The number of the line in which 'string' appears, starting from 1. + """ + number = -1 + + with open(file_name) as src_file: + for i, line in enumerate(src_file): + if string in line: + number = i + 1 + break + + if number == -1: + raise NoLineError(file_name, string) + + return number + +def break_at(file_name, string, temporary=True, thread=None): + """Places a breakpoint on the first line in 'file_name' containing 'string'. + + 'string' is usually a comment like "Stop here". Notice this may fail unless + the comment is placed inline next to actual code, e.g.: + + ... + /* Stop here */ + ... + + may fail, while: + + ... + some_func(); /* Stop here */ + ... + + will succeed. + + If 'thread' isn't None, the breakpoint will be set for all the threads. + Otherwise, it'll be set only for 'thread'. + + Args: + file_name (string): The name of the file we'll place the breakpoint in. + string (string): A string we'll look for inside the file. + We'll place a breakpoint on the line which contains it. + temporary (bool): Whether the breakpoint should be automatically deleted + after we reach it. + thread (int): The number of the thread we'll place the breakpoint for, + as seen by gdb. If specified, it should be greater than zero. + """ + + if not thread: + thread_str = '' + else: + thread_str = 'thread {0}'.format(thread) + + if temporary: + command = 'tbreak' + break_type = 'Temporary breakpoint' + else: + command = 'break' + break_type = 'Breakpoint' + + line_number = str(get_line_number(file_name, string)) + + test('{0} {1}:{2} {3}'.format(command, file_name, line_number, thread_str), + r'{0} [0-9]+ at 0x[a-f0-9]+: file {1}, line {2}\.'.format(break_type, + file_name, + line_number)) + +def continue_cmd(thread=None): + """Executes a gdb 'continue' command. + + If 'thread' isn't None, the command will be applied to all the threads. + Otherwise, it'll be applied only to 'thread'. + + Args: + thread (int): The number of the thread we'll apply the command to, + as seen by gdb. If specified, it should be greater than zero. + """ + + if not thread: + command = 'continue' + else: + command = 'thread apply {0} continue'.format(thread) + + test(command) + +def next_cmd(count=1, thread=None): + """Executes a gdb 'next' command. + + If 'thread' isn't None, the command will be applied to all the threads. + Otherwise, it'll be applied only to 'thread'. + + Args: + count (int): The 'count' argument of the 'next' command. + thread (int): The number of the thread we'll apply the command to, + as seen by gdb. If specified, it should be greater than zero. + """ + + if not thread: + command = 'next' + else: + command = 'thread apply {0} next' + + test('{0} {1}'.format(command, count)) + +def select_thread(thread): + """Selects the thread indicated by 'thread'. + + Args: + thread (int): The number of the thread we'll switch to, as seen by gdb. + This should be greater than zero. + """ + + if thread > 0: + test('thread {0}'.format(thread)) + +def get_current_thread_lwpid(): + """Gets the current thread's Lightweight Process ID. + + Returns: + string: The current thread's LWP ID. + """ + + # It's easier to get the LWP ID through the Python API than the gdb CLI. + command = 'python print(gdb.selected_thread().ptid[1])' + + return test(command, r'[0-9]+') + +def set_scheduler_locking(mode): + """Executes the gdb 'set scheduler-locking' command. + + Args: + mode (bool): Whether the scheduler locking mode should be 'on'. + """ + modes = { + True: 'on', + False: 'off' + } + + test('set scheduler-locking {0}'.format(modes[mode])) + +def test_printer(var, to_string, children=None, is_ptr=True): + """ Tests the output of a pretty printer. + + For a variable called 'var', this tests whether its associated printer + outputs the expected 'to_string' and children (if any). + + Args: + var (string): The name of the variable we'll print. + to_string (raw string): The expected output of the printer's 'to_string' + method. + children (map {raw string->raw string}): A map with the expected output + of the printer's children' method. + is_ptr (bool): Whether 'var' is a pointer, and thus should be + dereferenced. + """ + + if is_ptr: + var = '*{0}'.format(var) + + test('print {0}'.format(var), to_string) + + if children: + for name, value in children.items(): + # Children are shown as 'name = value'. + test('print {0}'.format(var), r'{0} = {1}'.format(name, value)) + +def check_debug_symbol(symbol): + """ Tests whether a given debugging symbol exists. + + If the symbol doesn't exist, raises a DebugError. + + Args: + symbol (string): The symbol we're going to check for. + """ + + try: + test('ptype {0}'.format(symbol), r'type = {0}'.format(symbol)) + + except pexpect.TIMEOUT: + # The symbol doesn't exist. + raise DebugError(symbol) diff --git a/scripts/test_printers_exceptions.py b/scripts/test_printers_exceptions.py new file mode 100644 index 0000000..17034b5 --- /dev/null +++ b/scripts/test_printers_exceptions.py @@ -0,0 +1,61 @@ +# Exception classes used when testing the Python pretty printers. +# +# Copyright (C) 2016 Free Software Foundation, Inc. +# This file is part of the GNU C Library. +# +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, see +# <http://www.gnu.org/licenses/>. + +class NoLineError(Exception): + """Custom exception to indicate that a test file doesn't contain + the requested string. + """ + + def __init__(self, file_name, string): + """Constructor. + + Args: + file_name (string): The name of the test file. + string (string): The string that was requested. + """ + + super(NoLineError, self).__init__() + self.file_name = file_name + self.string = string + + def __str__(self): + """Shows a readable representation of the exception.""" + + return ('File {0} has no line containing the following string: {1}' + .format(self.file_name, self.string)) + +class DebugError(Exception): + """Custom exception to indicate that a required debugging symbol is missing. + """ + + def __init__(self, symbol): + """Constructor. + + Args: + symbol (string): The name of the entity whose debug info is missing. + """ + + super(DebugError, self).__init__() + self.symbol = symbol + + def __str__(self): + """Shows a readable representation of the exception.""" + + return ('The required debugging information for {0} is missing.' + .format(self.symbol)) |