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gh-128421: Avoid TSAN warnings in sys._current_frames()#131548
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colesbury merged 1 commit intopython:mainfromMar 24, 2025
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gh-128421: Avoid TSAN warnings in sys._current_frames()#131548colesbury merged 1 commit intopython:mainfrom
colesbury merged 1 commit intopython:mainfrom
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This tells TSAN not to sanitize PyUnstable_InterpreterFrame_GetLine().There's a possible data race on the access to the frame's instr_ptrif the frame is currently executing. We don't really care about therace. In theory, we could use relaxed atomics for every access to`instr_ptr`, but that would create more code churn and current compilersare overly conservative with optimizations around relaxed atomicaccesses.We also don't sanitize _PyFrame_IsIncomplete() because it accesses`instr_ptr` and is called from assertions within PyFrame_GetCode().
bedevere-bot commentedMar 21, 2025
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kumaraditya303 approved these changesMar 23, 2025
da6730c intopython:main 128 checks passed
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diegorusso pushed a commit to diegorusso/cpython that referenced this pull requestApr 1, 2025
…ongh-131548)This tells TSAN not to sanitize `PyUnstable_InterpreterFrame_GetLine()`.There's a possible data race on the access to the frame's `instr_ptr`if the frame is currently executing. We don't really care about therace. In theory, we could use relaxed atomics for every access to`instr_ptr`, but that would create more code churn and current compilersare overly conservative with optimizations around relaxed atomicaccesses.We also don't sanitize `_PyFrame_IsIncomplete()` because it accesses`instr_ptr` and is called from assertions within PyFrame_GetCode().
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This tells TSAN not to sanitize PyUnstable_InterpreterFrame_GetLine(). There's a possible data race on the access to the frame's instr_ptr if the frame is currently executing. We don't really care about the race. In theory, we could use relaxed atomics for every access to
instr_ptr, but that would create more code churn and current compilers are overly conservative with optimizations around relaxed atomic accesses.We also don't sanitize _PyFrame_IsIncomplete() because it accesses
instr_ptrand is called from assertions within PyFrame_GetCode().