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pythongh-115773: Add tests to exercise the _Py_DebugOffsets structure (…
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Original file line number | Diff line number | Diff line change |
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import unittest | ||
import os | ||
import textwrap | ||
import importlib | ||
import sys | ||
from test.support import os_helper, SHORT_TIMEOUT | ||
from test.support.script_helper import make_script | ||
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import subprocess | ||
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PROCESS_VM_READV_SUPPORTED = False | ||
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try: | ||
from _testexternalinspection import PROCESS_VM_READV_SUPPORTED | ||
from _testexternalinspection import get_stack_trace | ||
except ImportError: | ||
unittest.skip("Test only runs when _testexternalinspection is available") | ||
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def _make_test_script(script_dir, script_basename, source): | ||
to_return = make_script(script_dir, script_basename, source) | ||
importlib.invalidate_caches() | ||
return to_return | ||
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class TestGetStackTrace(unittest.TestCase): | ||
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@unittest.skipIf(sys.platform != "darwin" and sys.platform != "linux", "Test only runs on Linux and MacOS") | ||
@unittest.skipIf(sys.platform == "linux" and not PROCESS_VM_READV_SUPPORTED, "Test only runs on Linux with process_vm_readv support") | ||
def test_remote_stack_trace(self): | ||
# Spawn a process with some realistic Python code | ||
script = textwrap.dedent("""\ | ||
import time, sys, os | ||
def bar(): | ||
for x in range(100): | ||
if x == 50: | ||
baz() | ||
def baz(): | ||
foo() | ||
def foo(): | ||
fifo = sys.argv[1] | ||
with open(sys.argv[1], "w") as fifo: | ||
fifo.write("ready") | ||
time.sleep(1000) | ||
bar() | ||
""") | ||
stack_trace = None | ||
with os_helper.temp_dir() as work_dir: | ||
script_dir = os.path.join(work_dir, "script_pkg") | ||
os.mkdir(script_dir) | ||
fifo = f"{work_dir}/the_fifo" | ||
os.mkfifo(fifo) | ||
script_name = _make_test_script(script_dir, 'script', script) | ||
try: | ||
p = subprocess.Popen([sys.executable, script_name, str(fifo)]) | ||
with open(fifo, "r") as fifo_file: | ||
response = fifo_file.read() | ||
self.assertEqual(response, "ready") | ||
stack_trace = get_stack_trace(p.pid) | ||
except PermissionError: | ||
self.skipTest("Insufficient permissions to read the stack trace") | ||
finally: | ||
os.remove(fifo) | ||
p.kill() | ||
p.terminate() | ||
p.wait(timeout=SHORT_TIMEOUT) | ||
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expected_stack_trace = [ | ||
'foo', | ||
'baz', | ||
'bar', | ||
'<module>' | ||
] | ||
self.assertEqual(stack_trace, expected_stack_trace) | ||
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@unittest.skipIf(sys.platform != "darwin" and sys.platform != "linux", "Test only runs on Linux and MacOS") | ||
@unittest.skipIf(sys.platform == "linux" and not PROCESS_VM_READV_SUPPORTED, "Test only runs on Linux with process_vm_readv support") | ||
def test_self_trace(self): | ||
stack_trace = get_stack_trace(os.getpid()) | ||
self.assertEqual(stack_trace[0], "test_self_trace") | ||
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if __name__ == "__main__": | ||
unittest.main() |
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