Skip `test_gdb.test_backtrace.test_threads` in free-threaded build

[colesbury]

Feature or enhancement

The test_threads test checks that py-bt reports when a thread is waiting on the GIL. In the free-threaded build, the GIL will typically be disabled. I think we should just skip the test in that case.

cpython/Lib/test/test_gdb/test_backtrace.py

Lines 53 to 83 in 027fa2e

	def test_threads(self):
	'Verify that "py-bt" indicates threads that are waiting for the GIL'
	cmd = '''
	from threading import Thread
	class TestThread(Thread):
	# These threads would run forever, but we'll interrupt things with the
	# debugger
	def run(self):
	i = 0
	while 1:
	i += 1
	t = {}
	for i in range(4):
	t[i] = TestThread()
	t[i].start()
	# Trigger a breakpoint on the main thread
	id(42)
	'''
	# Verify with "py-bt":
	gdb_output = self.get_stack_trace(cmd,
	cmds_after_breakpoint=['thread apply all py-bt'])
	self.assertIn('Waiting for the GIL', gdb_output)
	# Verify with "py-bt-full":
	gdb_output = self.get_stack_trace(cmd,
	cmds_after_breakpoint=['thread apply all py-bt-full'])
	self.assertIn('Waiting for the GIL', gdb_output)

Linked PRs

• gh-117474: Skip GIL test in free-threaded build #117475

[nineteendo]

Must this be backported or can this be closed?

[erlend-aasland]

Free-threading is only (partially) implemented in 3.13, so there is no need to backport this. Thanks for the ping!