[compiler-rt] Revert "[compiler-rt] Also consider SIGPROF as a synchronous signal (#85188)" (PR #85296)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

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

Author: None (dyung)

<details>
<summary>Changes</summary>

This reverts commit 6f3f659ce9ab91002b4a490b0ce4b085981383cd.

This change is causing TSAN failures on a bot as reported in #<!-- -->85188:
https://lab.llvm.org/buildbot/#/builders/247/builds/15279

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Full diff: https://github.com/llvm/llvm-project/pull/85296.diff


1 Files Affected:

- (modified) compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp (+1-3) 


``````````diff
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
index 2bebe651b994e5..8ffc703b05eace 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
@@ -126,7 +126,6 @@ const int SIGFPE = 8;
 const int SIGSEGV = 11;
 const int SIGPIPE = 13;
 const int SIGTERM = 15;
-const int SIGPROF = 27;
 #if defined(__mips__) || SANITIZER_FREEBSD || SANITIZER_APPLE || SANITIZER_NETBSD
 const int SIGBUS = 10;
 const int SIGSYS = 12;
@@ -2169,8 +2168,7 @@ 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 == SIGPROF;
+         sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || sig == SIGSYS;
 }
 
 void sighandler(int sig, __sanitizer_siginfo *info, void *ctx) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/85296