the function did nothing if the key already exists (if the current value is a
non-NULL pointer).
_testcapi.run_in_subinterp() now correctly sets the new Python thread state of
the current thread when a subinterpreter is created.
between tracemalloc_remove_trace() and tracemalloc_add_trace() to reduce the
risk of race condition.
tracemalloc_add_trace() cannot fail anymore in tracemalloc_realloc() when
tracemalloc_realloc() resizes a memory block.
PyGILState_Ensure()/PyGILState_Release() calls to the raw wrappers to simplify
the code.
Rename also tracemalloc_log_alloc/log_free() to
tracemalloc_add_trace/remove_trace().
The limit is now 178,956,969 on 64 bit (it is greater on 32 bit because
structures are smaller).
Use int instead of Py_ssize_t to store the number of frames to have smaller
traceback_t objects.
Victor Stinner