Function check_entry_exit_locking

deps/jemalloc/src/jemalloc.c:683–701

* Ensure that we don't hold any locks upon entry to or exit from allocator * code (in a "broad" sense that doesn't count a reentrant allocation as an * entrance or exit). */

 * entrance or exit).
 */
JEMALLOC_ALWAYS_INLINE void
check_entry_exit_locking(tsdn_t *tsdn) {
	if (!config_debug) {
		return;
	}
	if (tsdn_null(tsdn)) {
		return;
	}
	tsd_t *tsd = tsdn_tsd(tsdn);
	/*
	 * It's possible we hold locks at entry/exit if we're in a nested
	 * allocation.
	 */
	int8_t reentrancy_level = tsd_reentrancy_level_get(tsd);
	if (reentrancy_level != 0) {
		return;
	}
	witness_assert_lockless(tsdn_witness_tsdp_get(tsdn));
}

/*
 * End miscellaneous support functions.