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libsanitizer: Fix GetPcSpBp determination of SP on 32-bit Solaris/x86 

The latest Solaris 11.4/x86 update uncovered a libsanitizer bug that
caused one test to FAIL for 32-bit:

+FAIL: c-c++-common/asan/null-deref-1.c   -O0  output pattern test
+FAIL: c-c++-common/asan/null-deref-1.c   -O1  output pattern test
+FAIL: c-c++-common/asan/null-deref-1.c   -O2  output pattern test
+FAIL: c-c++-common/asan/null-deref-1.c   -O2 -flto  output pattern test
+FAIL: c-c++-common/asan/null-deref-1.c -O2 -flto -flto-partition=none
output pattern test
+FAIL: c-c++-common/asan/null-deref-1.c   -O3 -g  output pattern test
+FAIL: c-c++-common/asan/null-deref-1.c   -Os  output pattern test

I've identified the problem and the fix has just landed in upstream
llvm-project:

	https://reviews.llvm.org/D83664

Tested on i386-pc-solaris2.11 and x86_64-pc-linux.gnu.

	libsanitizer:
	* sanitizer_common/sanitizer_linux.cpp: Cherry-pick llvm-project
	revision f0e9b76c3500496f8f3ea7abe6f4bf801e3b41e7.
This commit is contained in:
Rainer Orth 2020-07-16 10:38:48 +02:00
parent fe8185b509
commit 6805c1c6a6
1 changed files with 3 additions and 3 deletions
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6
libsanitizer/sanitizer_common/sanitizer_linux.cpp
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@ -2043,13 +2043,13 @@ static void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
# ifndef REG_EBP
# define REG_EBP 6 // REG_FP
# endif
# ifndef REG_ESP
# define REG_ESP 17 // REG_SP
# ifndef REG_UESP
# define REG_UESP 17 // REG_SP
# endif
# endif
*pc = ucontext->uc_mcontext.gregs[REG_EIP];
*bp = ucontext->uc_mcontext.gregs[REG_EBP];
*sp = ucontext->uc_mcontext.gregs[REG_ESP];
*sp = ucontext->uc_mcontext.gregs[REG_UESP];
# endif
#elif defined(__powerpc__) || defined(__powerpc64__)
ucontext_t *ucontext = (ucontext_t*)context;