From 4862ff8d17dd8e2bd47394f6c368c2e2c9609c39 Mon Sep 17 00:00:00 2001
From: Martin Storsjo <martin@martin.st>
Date: Tue, 11 Dec 2018 09:53:11 +0000
Subject: [PATCH] [SEH] Zero-initialize EXCEPTION_RECORD and
 UNWIND_HISTORY_TABLE before calling RtlUnwindEx

This fixes PR39935.

llvm-svn: 348836
---
 libunwind/src/Unwind-seh.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libunwind/src/Unwind-seh.cpp b/libunwind/src/Unwind-seh.cpp
index 73616a8..73a950a 100644
--- a/libunwind/src/Unwind-seh.cpp
+++ b/libunwind/src/Unwind-seh.cpp
@@ -374,6 +374,8 @@ _Unwind_Resume(_Unwind_Exception *exception_object) {
     CONTEXT ms_ctx;
     UNWIND_HISTORY_TABLE hist;
 
+    memset(&ms_exc, 0, sizeof(ms_exc));
+    memset(&hist, 0, sizeof(hist));
     ms_exc.ExceptionCode = STATUS_GCC_THROW;
     ms_exc.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
     ms_exc.NumberParameters = 4;
-- 
2.7.4