[libunwind] r348836 - [SEH] Zero-initialize EXCEPTION_RECORD and UNWIND_HISTORY_TABLE before calling RtlUnwindEx

[Martin Storsjo via cfe-commits]

Author: mstorsjo
Date: Tue Dec 11 01:53:11 2018
New Revision: 348836

URL: http://llvm.org/viewvc/llvm-project?rev=348836&view=rev
Log:
[SEH] Zero-initialize EXCEPTION_RECORD and UNWIND_HISTORY_TABLE before calling RtlUnwindEx

This fixes PR39935.

Modified:
    libunwind/trunk/src/Unwind-seh.cpp

Modified: libunwind/trunk/src/Unwind-seh.cpp
URL: http://llvm.org/viewvc/llvm-project/libunwind/trunk/src/Unwind-seh.cpp?rev=348836&r1=348835&r2=348836&view=diff
==============================================================================
--- libunwind/trunk/src/Unwind-seh.cpp (original)
+++ libunwind/trunk/src/Unwind-seh.cpp Tue Dec 11 01:53:11 2018
@@ -374,6 +374,8 @@ _Unwind_Resume(_Unwind_Exception *except
     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;