[libc-commits] [libc] [libc] Simple __stack_chk_guard implementation (PR #78804)

[Schrodinger ZHU Yifan via libc-commits]

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@@ -19,6 +19,7 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # compiler entrypoints (no corresponding header)
     libc.src.compiler.__stack_chk_fail
+    libc.src.compiler.__stack_chk_guard
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SchrodingerZhu wrote:

I don't think `__stack_chk_guard` is thread-wise. In MUSL, it is initialized only once with AT_RANDOM. If I don't remember it wrong, then burn threads are copying that value instead of creating new values. I think a function execution can be preempted and transfer to other threads.

https://github.com/llvm/llvm-project/pull/78804