[compiler-rt] [scudo] Do not unmap the memory containing the this object in unmapRingBuffer (PR #83034)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

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

Author: Fabio D'Urso (fabio-d)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/83034.diff


1 Files Affected:

- (modified) compiler-rt/lib/scudo/standalone/combined.h (+3-2) 


``````````diff
diff --git a/compiler-rt/lib/scudo/standalone/combined.h b/compiler-rt/lib/scudo/standalone/combined.h
index cd5a07be1576e9..197c6d85c9b06c 100644
--- a/compiler-rt/lib/scudo/standalone/combined.h
+++ b/compiler-rt/lib/scudo/standalone/combined.h
@@ -1610,8 +1610,9 @@ class Allocator {
     // is very important.
     RB->RawStackDepotMap.unmap(RB->RawStackDepotMap.getBase(),
                                RB->RawStackDepotMap.getCapacity());
-    RB->RawRingBufferMap.unmap(RB->RawRingBufferMap.getBase(),
-                               RB->RawRingBufferMap.getCapacity());
+    MemMapT RawRingBufferMap = RB->RawRingBufferMap;
+    RawRingBufferMap.unmap(RawRingBufferMap.getBase(),
+                           RawRingBufferMap.getCapacity());
     atomic_store(&RingBufferAddress, 0, memory_order_release);
   }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/83034