[compiler-rt] Reapply "[scudo] Apply the min release threshold to the group" (#112252) (PR #112266)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: None (ChiaHungDuan)

<details>
<summary>Changes</summary>

This reverts commit 037938d637b830332e50232d7b90b5faad039c11.

Fixed the iterator to avoid infinite loop

---
Full diff: https://github.com/llvm/llvm-project/pull/112266.diff


1 Files Affected:

- (modified) compiler-rt/lib/scudo/standalone/primary64.h (+5) 


``````````diff
diff --git a/compiler-rt/lib/scudo/standalone/primary64.h b/compiler-rt/lib/scudo/standalone/primary64.h
index 97188a5ac235cc..e382e01f5d8e54 100644
--- a/compiler-rt/lib/scudo/standalone/primary64.h
+++ b/compiler-rt/lib/scudo/standalone/primary64.h
@@ -1492,6 +1492,11 @@ template <typename Config> class SizeClassAllocator64 {
       }
 
       const uptr PushedBytesDelta = BytesInBG - BG->BytesInBGAtLastCheckpoint;
+      if (PushedBytesDelta < getMinReleaseAttemptSize(BlockSize)) {
+        Prev = BG;
+        BG = BG->Next;
+        continue;
+      }
 
       // Given the randomness property, we try to release the pages only if the
       // bytes used by free blocks exceed certain proportion of group size. Note

``````````

</details>


https://github.com/llvm/llvm-project/pull/112266