[llvm] fe1491b - [Support] Fix memory leak induced by `sys::RemoveFileOnSignal` (#159984)

[via llvm-commits]

Author: Alexandre Ganea
Date: 2025-11-01T10:55:34-04:00
New Revision: fe1491b7258aaf821cda89d5ed5f5c5248007136

URL: https://github.com/llvm/llvm-project/commit/fe1491b7258aaf821cda89d5ed5f5c5248007136
DIFF: https://github.com/llvm/llvm-project/commit/fe1491b7258aaf821cda89d5ed5f5c5248007136.diff

LOG: [Support] Fix memory leak induced by `sys::RemoveFileOnSignal` (#159984)

Before this PR, `FilesToRemove` was constructed but never deleted.

Added: 
    

Modified: 
    llvm/lib/Support/Windows/Signals.inc

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Support/Windows/Signals.inc b/llvm/lib/Support/Windows/Signals.inc
index 648d6a50287ec..da68994970ebb 100644
--- a/llvm/lib/Support/Windows/Signals.inc
+++ b/llvm/lib/Support/Windows/Signals.inc
@@ -421,8 +421,13 @@ bool sys::RemoveFileOnSignal(StringRef Filename, std::string *ErrMsg) {
     return true;
   }
 
-  if (FilesToRemove == NULL)
+  if (FilesToRemove == NULL) {
     FilesToRemove = new std::vector<std::string>;
+    std::atexit([]() {
+      delete FilesToRemove;
+      FilesToRemove = NULL;
+    });
+  }
 
   FilesToRemove->push_back(std::string(Filename));