[llvm] [hwasan] Allow stack traces even when fixed shadow is used (PR #109344)

[Florian Mayer via llvm-commits]

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@@ -1340,7 +1340,8 @@ Value *HWAddressSanitizer::getFrameRecordInfo(IRBuilder<> &IRB) {
 }
 
 void HWAddressSanitizer::emitPrologue(IRBuilder<> &IRB, bool WithFrameRecord) {
-  if (!Mapping.InTls)
+  if (!Mapping.InTls ||
+      (Mapping.Offset != 0 && Mapping.Offset != kDynamicShadowSentinel))
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fmayer wrote:

this is essentially `isFixedShadow`, right? maybe pull this into a variable of that name for documentation.

https://github.com/llvm/llvm-project/pull/109344