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gh-115999: Restore SET_OPCODE_OR_RETURN removed in GH-126414 #126515

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gh-115999: Restore SET_OPCODE_OR_RETURN removed in GH-126414 #126515

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19 changes: 19 additions & 0 deletions Python/specialize.c
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,25 @@ extern const char *_PyUOpName(int index);
* ./adaptive.md
*/

#ifdef Py_GIL_DISABLED
#define SET_OPCODE_OR_RETURN(instr, opcode) \
do { \
uint8_t old_op = _Py_atomic_load_uint8_relaxed(&(instr)->op.code); \
if (old_op >= MIN_INSTRUMENTED_OPCODE) { \
/* Lost race with instrumentation */ \
return; \
} \
if (!_Py_atomic_compare_exchange_uint8(&(instr)->op.code, &old_op, \
(opcode))) { \
/* Lost race with instrumentation */ \
assert(old_op >= MIN_INSTRUMENTED_OPCODE); \
return; \
} \
} while (0)
#else
#define SET_OPCODE_OR_RETURN(instr, opcode) (instr)->op.code = (opcode)
#endif

#ifdef Py_STATS
GCStats _py_gc_stats[NUM_GENERATIONS] = { 0 };
static PyStats _Py_stats_struct = { .gc_stats = _py_gc_stats };
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