diff --git a/llvm/lib/Support/Windows/Signals.inc b/llvm/lib/Support/Windows/Signals.inc
--- a/llvm/lib/Support/Windows/Signals.inc
+++ b/llvm/lib/Support/Windows/Signals.inc
@@ -554,7 +554,9 @@
 
 void llvm::sys::PrintStackTrace(raw_ostream &OS, int Depth) {
   // FIXME: Handle "Depth" parameter to print stack trace upto specified Depth
+  RegisterHandler();
   LocalPrintStackTrace(OS, nullptr);
+  LeaveCriticalSection(&CriticalSection);
 }
 
 void llvm::sys::SetInterruptFunction(void (*IF)()) {