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gh-123923: Defer refcounting for f_executable in _PyInterpreterFrame (#123924)

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Use a `_PyStackRef` and defer the reference to `f_executable` when
possible. This avoids some reference count contention in the common case
of executing the same code object from multiple threads concurrently in
the free-threaded build.
This commit is contained in:
Sam Gross 2024-09-12 12:37:06 -04:00 • committed by GitHub
parent 4ed7d1d6ac
commit b2afe2aae4
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GPG key ID: B5690EEEBB952194
18 changed files with 177 additions and 99 deletions
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7
Modules/_testexternalinspection.c
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@ -510,7 +510,7 @@ parse_frame_object(
return 0;
}
void* address_of_code_object;
uintptr_t address_of_code_object;
bytes_read = read_memory(
pid,
(void*)(address + offsets->interpreter_frame.executable),
@ -520,10 +520,11 @@ parse_frame_object(
return -1;
}
if (address_of_code_object == NULL) {
if (address_of_code_object == 0) {
return 0;
}
return parse_code_object(pid, result, offsets, address_of_code_object, previous_frame);
address_of_code_object &= ~Py_TAG_BITS;
return parse_code_object(pid, result, offsets, (void *)address_of_code_object, previous_frame);
}
static PyObject*