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https://github.com/JakeHillion/drgn.git
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301cc767ba
Previously, drgn had no way to represent a thread – retrieving a stack trace (the only extant thread-specific operation) was achieved by requiring the user to directly provide a tid. This commit introduces the scaffolding for the design outlined in issue #92, and implements the corresponding methods for userspace core dumps, the live Linux kernel, and Linux kernel core dumps. Future work will build on top of this commit to support live userspace processes. Signed-off-by: Kevin Svetlitski <svetlitski@fb.com>
66 lines
1.6 KiB
Python
66 lines
1.6 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# SPDX-License-Identifier: GPL-3.0-or-later
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import os
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import os.path
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import subprocess
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import tempfile
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import unittest
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from drgn import Program
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from tests import TestCase
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class TestCoreDump(TestCase):
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TIDS = (
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2265413,
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2265414,
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2265415,
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2265416,
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2265417,
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2265418,
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2265419,
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2265420,
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2265421,
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2265422,
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2265423,
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2265424,
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2265425,
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)
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CRASHED_TID = 2265419
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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with tempfile.NamedTemporaryFile() as core_dump_file:
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try:
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subprocess.check_call(
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[
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"zstd",
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"--quiet",
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"--decompress",
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"--stdout",
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"tests/sample.coredump.zst",
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],
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stdout=core_dump_file,
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)
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except FileNotFoundError:
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raise unittest.SkipTest("zstd not found")
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cls.prog = Program()
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cls.prog.set_core_dump(core_dump_file.name)
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def test_threads(self):
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self.assertSequenceEqual(
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sorted(thread.tid for thread in self.prog.threads()),
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self.TIDS,
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)
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def test_thread(self):
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for tid in self.TIDS:
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self.assertEqual(self.prog.thread(tid).tid, tid)
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self.assertRaises(LookupError, self.prog.thread, 99)
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def test_crashed_thread(self):
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self.assertEqual(self.prog.crashed_thread().tid, self.CRASHED_TID)
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