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