[compiler-rt] 930ca76 - [compiler-rt] [Memprof] leave BufferedStackTrace uninit

[Florian Mayer via llvm-commits]

Author: Florian Mayer
Date: 2024-08-07T15:19:27-07:00
New Revision: 930ca768570fbe8789046a89478c995eb717c7c6

URL: https://github.com/llvm/llvm-project/commit/930ca768570fbe8789046a89478c995eb717c7c6
DIFF: https://github.com/llvm/llvm-project/commit/930ca768570fbe8789046a89478c995eb717c7c6.diff

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

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

Pull Request: https://github.com/llvm/llvm-project/pull/102256

Added: 
    

Modified: 
    compiler-rt/lib/memprof/memprof_stack.h

Removed: 
    


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diff  --git a/compiler-rt/lib/memprof/memprof_stack.h b/compiler-rt/lib/memprof/memprof_stack.h
index a8fdfc9def9d0..2a07019a71e5f 100644
--- a/compiler-rt/lib/memprof/memprof_stack.h
+++ b/compiler-rt/lib/memprof/memprof_stack.h
@@ -33,7 +33,7 @@ u32 GetMallocContextSize();
 // don't want stack trace to contain functions from MemProf internals.
 
 #define GET_STACK_TRACE(max_size, fast)                                        \
-  BufferedStackTrace stack;                                                    \
+  UNINITIALIZED BufferedStackTrace stack;                                                    \
   if (max_size <= 2) {                                                         \
     stack.size = max_size;                                                     \
     if (max_size > 0) {                                                        \