Add a new watchdog timer interface. The interface does not permit handling timeouts, so

it's only really useful if you're going to crash anyways. Use it in the pretty stack trace
printer to kill the compiler if we hang while printing the stack trace.

llvm-svn: 177962

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/Support/PrettyStackTrace.cpp b/llvm/lib/Support/PrettyStackTrace.cpp
index 21d56adb5e0..23ee5ab105a 100644
--- a/llvm/lib/Support/PrettyStackTrace.cpp
+++ b/llvm/lib/Support/PrettyStackTrace.cpp
@@ -17,6 +17,7 @@
 #include "llvm/Config/config.h"     // Get autoconf configuration settings
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/ThreadLocal.h"
+#include "llvm/Support/Watchdog.h"
 #include "llvm/Support/raw_ostream.h"
 
 #ifdef HAVE_CRASHREPORTERCLIENT_H
@@ -37,7 +38,10 @@ static unsigned PrintStack(const PrettyStackTraceEntry *Entry, raw_ostream &OS){
   if (Entry->getNextEntry())
     NextID = PrintStack(Entry->getNextEntry(), OS);
   OS << NextID << ".\t";
-  Entry->print(OS);
+  {
+    sys::Watchdog W(5);
+    Entry->print(OS);
+  }
   
   return NextID+1;
 }