Add _PyThreadState_UncheckedGet()
Issue #26154: Add a new private _PyThreadState_UncheckedGet() function which
gets the current thread state, but don't call Py_FatalError() if it is NULL.
Python 3.5.1 removed the _PyThreadState_Current symbol from the Python C API to
no more expose complex and private atomic types. Atomic types depends on the
compiler or can even depend on compiler options. The new function
_PyThreadState_UncheckedGet() allows to get the variable value without having
to care of the exact implementation of atomic types.
Changes:
* Replace direct usage of the _PyThreadState_Current variable with a call to
_PyThreadState_UncheckedGet().
* In pystate.c, replace direct usage of the _PyThreadState_Current variable
with the PyThreadState_GET() macro for readability.
* Document also PyThreadState_Get() in pystate.h
diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 1ed22bf..14384b5 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -490,7 +490,7 @@
assert(st == PY_LOCK_FAILURE);
/* get the thread holding the GIL, NULL if no thread hold the GIL */
- current = (PyThreadState*)_Py_atomic_load_relaxed(&_PyThreadState_Current);
+ current = _PyThreadState_UncheckedGet();
_Py_write_noraise(thread.fd, thread.header, (int)thread.header_len);