forked from OSchip/llvm-project
55f65a3554
Summary: On PPC64, half the msan tests fail with an infinite recursion through GetStackTrace like this: #0 __msan::GetStackTrace #1 __msan_memcpy #2 ?? () from /lib64/libgcc_s.so.1 #3 ?? () from /lib64/libgcc_s.so.1 #4 _Unwind_Backtrace #5 __sanitizer::BufferedStackTrace::SlowUnwindStack #6 __sanitizer::BufferedStackTrace::Unwind #7 __msan::GetStackTrace #8 __interceptor_calloc #9 _dl_allocate_tls #10 pthread_create@@GLIBC_2.17 #11 __interceptor_pthread_create #12 main The problem is that we call _Unwind_Backtrace to get a stack trace; but _Unwind_Backtrace calls memcpy, which we intercept and try to get another stack trace. This patch fixes it in __msan_memcpy by skipping the stack trace if IsInSymbolizer(). This works because GetStackTrace already creates a SymbolizerScope to "block reports from our interceptors during _Unwind_Backtrace". Reviewers: samsonov, wschmidt, eugenis Reviewed By: eugenis Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D10762 llvm-svn: 240878 |
||
|---|---|---|
| .. | ||
| BlocksRuntime | ||
| asan | ||
| builtins | ||
| dfsan | ||
| interception | ||
| lsan | ||
| msan | ||
| profile | ||
| safestack | ||
| sanitizer_common | ||
| tsan | ||
| ubsan | ||
| CMakeLists.txt | ||
| Makefile.mk | ||