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[3.15] gh-149584: Fix excessive overhead in the Tachyon profiler regarding the cache behavior (GH-149649) (#150152)

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Miss Islington (bot) 2026-05-20 13:59:10 +02:00 • committed by GitHub
parent 7f29fa5032
commit 034c536d56
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12 changed files with 739 additions and 127 deletions
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13
Modules/_remote_debugging/code_objects.c
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@ -405,6 +405,8 @@ parse_code_object(RemoteUnwinderObject *unwinder,
meta->func_name = func;
meta->file_name = file;
meta->linetable = linetable;
meta->last_frame_info = NULL;
meta->last_addrq = -1;
meta->first_lineno = GET_MEMBER(int, code_object, unwinder->debug_offsets.code_object.firstlineno);
meta->addr_code_adaptive = real_address + (uintptr_t)unwinder->debug_offsets.code_object.co_code_adaptive;
@ -482,6 +484,12 @@ parse_code_object(RemoteUnwinderObject *unwinder,
addrq = (uint16_t *)ip - (uint16_t *)meta->addr_code_adaptive;
#endif
; // Empty statement to avoid C23 extension warning
if (!unwinder->opcodes && meta->last_frame_info != NULL && meta->last_addrq == addrq) {
*result = Py_NewRef(meta->last_frame_info);
return 0;
}
LocationInfo info = {0};
bool ok = parse_linetable(addrq, PyBytes_AS_STRING(meta->linetable),
PyBytes_GET_SIZE(meta->linetable),
@ -529,6 +537,11 @@ parse_code_object(RemoteUnwinderObject *unwinder,
goto error;
}
if (!unwinder->opcodes) {
Py_XSETREF(meta->last_frame_info, Py_NewRef(tuple));
meta->last_addrq = addrq;
}
*result = tuple;
return 0;