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| author | Sagar Thakur <sagar.thakur@imgtec.com> | 2016-12-08 06:30:58 +0000 |
|---|---|---|
| committer | Sagar Thakur <sagar.thakur@imgtec.com> | 2016-12-08 06:30:58 +0000 |
| commit | 80e3cea81e7d49c1a57846ded90846c8ced5447e (patch) | |
| tree | daaedd3f696e32c871a1e3154192d917f510e94f /lib/msan | |
| parent | d3e58a9d6a007ac53930a68af5ef6c6418066247 (diff) | |
[MSAN][MIPS] Fix fork.cc test on MIPS
Summary: For platforms which support slow unwinder only, we restrict the store context size to 1, basically only storing the current pc. We do this because the slow unwinder which is based on libunwind is not async signal safe and causes random freezes in forking applications as well as in signal handlers.
Reviewed by eugenis.
Differential: D23107
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@289027 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/msan')
| -rw-r--r-- | lib/msan/msan.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/msan/msan.h b/lib/msan/msan.h index 49c0a3079..0709260ee 100644 --- a/lib/msan/msan.h +++ b/lib/msan/msan.h @@ -329,11 +329,20 @@ const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1; StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), \ common_flags()->fast_unwind_on_malloc) +// For platforms which support slow unwinder only, we restrict the store context +// size to 1, basically only storing the current pc. We do this because the slow +// unwinder which is based on libunwind is not async signal safe and causes +// random freezes in forking applications as well as in signal handlers. #define GET_STORE_STACK_TRACE_PC_BP(pc, bp) \ BufferedStackTrace stack; \ - if (__msan_get_track_origins() > 1 && msan_inited) \ - GetStackTrace(&stack, flags()->store_context_size, pc, bp, \ - common_flags()->fast_unwind_on_malloc) + if (__msan_get_track_origins() > 1 && msan_inited) { \ + if (!SANITIZER_CAN_FAST_UNWIND) \ + GetStackTrace(&stack, Min(1, flags()->store_context_size), pc, bp, \ + false); \ + else \ + GetStackTrace(&stack, flags()->store_context_size, pc, bp, \ + common_flags()->fast_unwind_on_malloc); \ + } #define GET_FATAL_STACK_TRACE_PC_BP(pc, bp) \ BufferedStackTrace stack; \ |