Only print the stack trace if it was requested. Previously, any call into

the Signals module that registered the handlers would cause the stack trace
to be generated. Now, you must explicitly call PrintStackTraceOnErrorSignal
in order for that to happen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28810 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/System/Unix/Signals.inc b/lib/System/Unix/Signals.inc
index a643dbf972c2f4412f23ca4bd37067885a4dbb6d..4096ad27273b91cdbd86186350f5fbecd5df9447 100644 (file)
--- a/lib/System/Unix/Signals.inc
+++ b/lib/System/Unix/Signals.inc
@@ -24,6 +24,8 @@
 
 namespace {
 
+bool StackTraceRequested = false; 
+
 /// InterruptFunction - The function to call if ctrl-c is pressed.
 void (*InterruptFunction)() = 0;
 
@@ -132,7 +134,8 @@ RETSIGTYPE SignalHandler(int Sig) {
 
   // Otherwise if it is a fault (like SEGV) output the stacktrace to
   // STDERR (if we can) and reissue the signal to die...
-  PrintStackTrace();
+  if (StackTraceRequested)
+    PrintStackTrace();
   signal(Sig, SIG_DFL);
 }
 
@@ -178,6 +181,7 @@ void sys::RemoveDirectoryOnSignal(const llvm::sys::Path& path) {
 /// PrintStackTraceOnErrorSignal - When an error signal (such as SIBABRT or
 /// SIGSEGV) is delivered to the process, print a stack trace and then exit.
 void sys::PrintStackTraceOnErrorSignal() {
+  StackTraceRequested = true;
   std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
 }