[compiler-rt] 6f3f659 - [compiler-rt] Also consider SIGPROF as a synchronous signal (#85188)

[via llvm-commits]

Author: serge-sans-paille
Date: 2024-03-14T12:39:47Z
New Revision: 6f3f659ce9ab91002b4a490b0ce4b085981383cd

URL: https://github.com/llvm/llvm-project/commit/6f3f659ce9ab91002b4a490b0ce4b085981383cd
DIFF: https://github.com/llvm/llvm-project/commit/6f3f659ce9ab91002b4a490b0ce4b085981383cd.diff

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

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

Added: 
    

Modified: 
    compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
index 8ffc703b05eace..2bebe651b994e5 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
@@ -126,6 +126,7 @@ 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;
@@ -2168,7 +2169,8 @@ 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) {