[compiler-rt] 21648d3 - [compiler-rt] [TSan] leave BufferedStackTrace uninit

[Florian Mayer via llvm-commits]

Author: Florian Mayer
Date: 2024-08-07T15:19:27-07:00
New Revision: 21648d3228370fb6ca1838c084f7c6ced6df4307

URL: https://github.com/llvm/llvm-project/commit/21648d3228370fb6ca1838c084f7c6ced6df4307
DIFF: https://github.com/llvm/llvm-project/commit/21648d3228370fb6ca1838c084f7c6ced6df4307.diff

LOG: [compiler-rt] [TSan] leave BufferedStackTrace uninit

Otherwise we have to memset 2040 bytes (255 * 8) for each call

Pull Request: https://github.com/llvm/llvm-project/pull/102255

Added: 
    

Modified: 
    compiler-rt/lib/tsan/dd/dd_rtl.cpp

Removed: 
    


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diff  --git a/compiler-rt/lib/tsan/dd/dd_rtl.cpp b/compiler-rt/lib/tsan/dd/dd_rtl.cpp
index 35b367c0cecb0..0ac6d321894b3 100644
--- a/compiler-rt/lib/tsan/dd/dd_rtl.cpp
+++ b/compiler-rt/lib/tsan/dd/dd_rtl.cpp
@@ -19,7 +19,7 @@ namespace __dsan {
 static Context *ctx;
 
 static u32 CurrentStackTrace(Thread *thr, uptr skip) {
-  BufferedStackTrace stack;
+  UNINITIALIZED BufferedStackTrace stack;
   thr->ignore_interceptors = true;
   stack.Unwind(1000, 0, 0, 0, 0, 0, false);
   thr->ignore_interceptors = false;