[libc-commits] [libc] [llvm] [libc] Implement pthread_cleanup_push and pthread_cleanup_pop (PR #223427)

[Schrodinger ZHU Yifan via libc-commits]

================
@@ -108,12 +109,14 @@ struct alignas(STACK_ALIGNMENT) ThreadAttributes {
   ThreadAtExitCallbackMgr *atexit_callback_mgr;
   void *platform_data;
   cpp::Atomic<ThreadAttributes *> joiner;
+  __pthread_cleanup_frame *cleanup_stack;
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SchrodingerZhu wrote:

could you make this an explicit stack:

```
class CleanupStack {
    void push(Frame*);
    void pop();
};
```

https://github.com/llvm/llvm-project/pull/223427