From a2ce1e0055a3f4656877eea7d75d7dde78aa173f Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Tue, 18 Dec 2012 14:19:24 +0000
Subject: [PATCH] tsan: warn about reports from signal handlers

llvm-svn: 170430
---
 compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc b/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc
index 23e4ae5bf392..2d073be905cd 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl_report.cc
@@ -510,6 +510,10 @@ void ReportRace(ThreadState *thr) {
     return;
   ScopedInRtl in_rtl;
 
+  if (thr->in_signal_handler)
+    Printf("ThreadSanitizer: printing report from signal handler."
+           " Can crash or hang.\n");
+
   bool freed = false;
   {
     Shadow s(thr->racy_state[1]);