[llvm-branch-commits] [clang] bc2dad1 - [clang][aarch64][WOA64][docs] Release note for longjmp crash with /guard:cf

[Peter Waller via llvm-branch-commits]

Author: Peter Waller
Date: 2021-02-04T14:35:14Z
New Revision: bc2dad1671598a87423c61c355d03db49ce76907

URL: https://github.com/llvm/llvm-project/commit/bc2dad1671598a87423c61c355d03db49ce76907
DIFF: https://github.com/llvm/llvm-project/commit/bc2dad1671598a87423c61c355d03db49ce76907.diff

LOG: [clang][aarch64][WOA64][docs] Release note for longjmp crash with /guard:cf

Add a release note workaround for PR47463.

Bug: https://bugs.llvm.org/show_bug.cgi?id=47463

Differential Revision: https://reviews.llvm.org/D95435

Added: 
    

Modified: 
    clang/docs/ReleaseNotes.rst

Removed: 
    


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diff  --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 9efd4c01f053..c17d84de320c 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -153,6 +153,11 @@ Windows Support
 - Implicitly add ``.exe`` suffix for MinGW targets, even when cross compiling.
   (This matches a change from GCC 8.)
 
+- Windows on Arm64: programs using the C standard library's setjmp and longjmp
+  functions may crash with a "Security check failure or stack buffer overrun"
+  exception. To workaround (with reduced security), compile with
+  /guard:cf,nolongjmp.
+
 C Language Changes in Clang
 ---------------------------