From 219822fd5db6305592b45677a3b38c02b523360e Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Tue, 9 Apr 2024 06:39:21 -0700 Subject: mmap: Avoid the sanitizer configure check failure When -fsanitize=address,undefined is used to build, the mmap configure check failed with ================================================================= ==231796==ERROR: LeakSanitizer: detected memory leaks Direct leak of 4096 byte(s) in 1 object(s) allocated from: #0 0x7cdd3d0defdf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69 #1 0x5750c7f6d72b in main /home/alan/build/gas-san/all/bfd/conftest.c:239 Direct leak of 4096 byte(s) in 1 object(s) allocated from: #0 0x7cdd3d0defdf in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:69 #1 0x5750c7f6d2e1 in main /home/alan/build/gas-san/all/bfd/conftest.c:190 SUMMARY: AddressSanitizer: 8192 byte(s) leaked in 2 allocation(s). Define GCC_AC_FUNC_MMAP with export ASAN_OPTIONS=detect_leaks=0 to avoid the sanitizer configure check failure. config/ * mmap.m4 (GCC_AC_FUNC_MMAP): New. * no-executables.m4 (AC_FUNC_MMAP): Renamed to GCC_AC_FUNC_MMAP. Change AC_FUNC_MMAP to GCC_AC_FUNC_MMAP. libiberty/ * Makefile.in (aclocal_deps): Add $(srcdir)/../config/mmap.m4. * acinclude.m4: Change AC_FUNC_MMAP to GCC_AC_FUNC_MMAP. * aclocal.m4: Regenerated. * configure: Likewise. zlib/ * acinclude.m4: Include ../config/mmap.m4. * Makefile.in: Regenerated. * configure: Likewise. --- libiberty/Makefile.in | 1 + libiberty/acinclude.m4 | 2 +- libiberty/aclocal.m4 | 1 + libiberty/configure | 5 +++++ 4 files changed, 8 insertions(+), 1 deletion(-) (limited to 'libiberty') diff --git a/libiberty/Makefile.in b/libiberty/Makefile.in index 85c4b6b..b77a41c 100644 --- a/libiberty/Makefile.in +++ b/libiberty/Makefile.in @@ -508,6 +508,7 @@ aclocal_deps = \ $(srcdir)/../config/cet.m4 \ $(srcdir)/../config/enable.m4 \ $(srcdir)/../config/gcc-plugin.m4 \ + $(srcdir)/../config/mmap.m4 \ $(srcdir)/../config/no-executables.m4 \ $(srcdir)/../config/override.m4 \ $(srcdir)/../config/picflag.m4 \ diff --git a/libiberty/acinclude.m4 b/libiberty/acinclude.m4 index 9974dcd..d08e31b 100644 --- a/libiberty/acinclude.m4 +++ b/libiberty/acinclude.m4 @@ -19,7 +19,7 @@ dnl On some versions of SunOS4 at least, strncmp reads a word at a time dnl but erroneously reads past the end of strings. This can cause dnl a SEGV in some cases. AC_DEFUN([libiberty_AC_FUNC_STRNCMP], -[AC_REQUIRE([AC_FUNC_MMAP]) +[AC_REQUIRE([GCC_AC_FUNC_MMAP]) AC_CACHE_CHECK([for working strncmp], ac_cv_func_strncmp_works, [AC_TRY_RUN([ /* Test by Jim Wilson and Kaveh Ghazi. diff --git a/libiberty/aclocal.m4 b/libiberty/aclocal.m4 index 364fb6b..9678b0a 100644 --- a/libiberty/aclocal.m4 +++ b/libiberty/aclocal.m4 @@ -17,6 +17,7 @@ m4_include([../config/cet.m4]) m4_include([../config/enable.m4]) m4_include([../config/gcc-plugin.m4]) m4_include([../config/hwcaps.m4]) +m4_include([../config/mmap.m4]) m4_include([../config/no-executables.m4]) m4_include([../config/override.m4]) m4_include([../config/picflag.m4]) diff --git a/libiberty/configure b/libiberty/configure index 5c69fee..18e98b8 100755 --- a/libiberty/configure +++ b/libiberty/configure @@ -7724,6 +7724,9 @@ if test x$gcc_no_link = xyes; then fi fi if test "x${ac_cv_func_mmap_fixed_mapped}" != xno; then + save_ASAN_OPTIONS="$ASAN_OPTIONS" + ASAN_OPTIONS=detect_leaks=0 + export ASAN_OPTIONS for ac_func in getpagesize do : @@ -7902,6 +7905,8 @@ $as_echo "#define HAVE_MMAP 1" >>confdefs.h fi rm -f conftest.mmap conftest.txt + ASAN_OPTIONS="$save_ASAN_OPTIONS" + fi { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working strncmp" >&5 -- cgit v1.1