[compiler-rt] [compiler-rt] Also consider SIGPROF as a synchronous signal (PR #85188)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: None (serge-sans-paille)

<details>
<summary>Changes</summary>

Blocking that signal causes inter-blocking for profilers that monitor threads through that signal.
Fix #<!-- -->83844 and #<!-- -->83561

---
Full diff: https://github.com/llvm/llvm-project/pull/85188.diff


1 Files Affected:

- (modified) compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp (+2-1) 


``````````diff
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
index 8ffc703b05eace..80dda58aacbf2d 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
@@ -2168,7 +2168,8 @@ static bool is_sync_signal(ThreadSignalContext *sctx, int sig,
     return false;
 #endif
   return sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || sig == SIGTRAP ||
-         sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || sig == SIGSYS;
+         sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || sig == SIGSYS ||
+         sig == SIGPROF;
 }
 
 void sighandler(int sig, __sanitizer_siginfo *info, void *ctx) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/85188