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[3.14] gh-136870: fix data races in instrumentation of bytecode (GH-136994)#137082
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…nGH-136994)De-instrumenting code objects modifies the thread local bytecode for all threads as such, holding the critical section on the code object is not sufficient and leads to data races. Now, the de-instrumentation is now performed under a stop the world pause as such no thread races with executing the thread local bytecode while it is being de-instrumented.(cherry picked from commit9a6b60a)Co-authored-by: Kumar Aditya <kumaraditya@python.org>
kumaraditya303 approved these changesJul 24, 2025
colesbury approved these changesJul 28, 2025
909a534 intopython:3.14 42 checks passed
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kumaraditya303 added a commit to miss-islington/cpython that referenced this pull requestSep 9, 2025
…pythonGH-136994) (python#137082)Co-authored-by: Kumar Aditya <kumaraditya@python.org>Co-authored-by: Zachary Ware <zach@python.org>
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De-instrumenting code objects modifies the thread local bytecode for all threads as such, holding the critical section on the code object is not sufficient and leads to data races. Now, the de-instrumentation is now performed under a stop the world pause as such no thread races with executing the thread local bytecode while it is being de-instrumented.
(cherry picked from commit9a6b60a)
Co-authored-by: Kumar Adityakumaraditya@python.org