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GH-118095: Allow a variant of RESUME_CHECK in tier 2 (GH-118286)
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6 changed files with 189 additions and 103 deletions
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@ -4258,6 +4258,29 @@ dummy_func(
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}
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/* Special version of RESUME_CHECK that (when paired with _EVAL_BREAKER_EXIT)
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* is safe for tier 2. Progress is guaranteed because _EVAL_BREAKER_EXIT calls
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* _Py_HandlePending which clears the eval_breaker so that _TIER2_RESUME_CHECK
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* will not exit if it is immediately executed again. */
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tier2 op(_TIER2_RESUME_CHECK, (--)) {
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#if defined(__EMSCRIPTEN__)
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EXIT_IF(_Py_emscripten_signal_clock == 0);
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_Py_emscripten_signal_clock -= Py_EMSCRIPTEN_SIGNAL_HANDLING;
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#endif
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uintptr_t eval_breaker = _Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker);
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EXIT_IF(eval_breaker & _PY_EVAL_EVENTS_MASK);
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assert(eval_breaker == FT_ATOMIC_LOAD_UINTPTR_ACQUIRE(_PyFrame_GetCode(frame)->_co_instrumentation_version));
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}
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tier2 op(_EVAL_BREAKER_EXIT, (--)) {
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_Py_CHECK_EMSCRIPTEN_SIGNALS_PERIODICALLY();
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QSBR_QUIESCENT_STATE(tstate);
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if (_Py_HandlePending(tstate) != 0) {
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GOTO_UNWIND();
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}
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EXIT_TO_TRACE();
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}
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// END BYTECODES //
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}
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