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gh-115999: Specialize LOAD_SUPER_ATTR in free-threaded builds (gh-127128)

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Use existing helpers to atomically modify the bytecode.  Add unit tests
to ensure specializing is happening as expected.  Add test_specialize.py
that can be used with ThreadSanitizer to detect data races.  
Fix thread safety issue with cell_set_contents().
This commit is contained in:
Neil Schemenauer 2024-12-03 09:32:26 -08:00 • committed by GitHub
parent 8ba9f5bca9
commit 0cb5222079
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6 changed files with 51 additions and 21 deletions
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Python/bytecodes.c
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@ -1946,7 +1946,7 @@ dummy_func(
};
specializing op(_SPECIALIZE_LOAD_SUPER_ATTR, (counter/1, global_super_st, class_st, unused -- global_super_st, class_st, unused)) {
#if ENABLE_SPECIALIZATION
#if ENABLE_SPECIALIZATION_FT
int load_method = oparg & 1;
if (ADAPTIVE_COUNTER_TRIGGERS(counter)) {
next_instr = this_instr;
@ -1955,7 +1955,7 @@ dummy_func(
}
OPCODE_DEFERRED_INC(LOAD_SUPER_ATTR);
ADVANCE_ADAPTIVE_COUNTER(this_instr[1].counter);
#endif /* ENABLE_SPECIALIZATION */
#endif /* ENABLE_SPECIALIZATION_FT */
}
tier1 op(_LOAD_SUPER_ATTR, (global_super_st, class_st, self_st -- attr, null if (oparg & 1))) {