2238dcc393
This is an ongoing series of commits that are reformatting our Python code. Reformatting is done with `black` (23.1.0). If you end up having problems merging this commit because you have made changes to a python file, the best way to handle that is to run `git checkout --ours <yourfile>` and then reformat it with black. RFC: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style Differential revision: https://reviews.llvm.org/D151460
136 lines
4.8 KiB
Python
136 lines
4.8 KiB
Python
"""Test that lldb functions correctly after the inferior has crashed."""
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import lldb
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from lldbsuite.test import lldbutil
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from lldbsuite.test import lldbplatformutil
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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class CrashingInferiorTestCase(TestBase):
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@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
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@expectedFailureNetBSD
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def test_inferior_crashing(self):
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"""Test that lldb reliably catches the inferior crashing (command)."""
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self.build()
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self.inferior_crashing()
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def test_inferior_crashing_register(self):
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"""Test that lldb reliably reads registers from the inferior after crashing (command)."""
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self.build()
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self.inferior_crashing_registers()
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@add_test_categories(["pyapi"])
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def test_inferior_crashing_python(self):
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"""Test that lldb reliably catches the inferior crashing (Python API)."""
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self.build()
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self.inferior_crashing_python()
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def test_inferior_crashing_expr(self):
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"""Test that the lldb expression interpreter can read from the inferior after crashing (command)."""
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self.build()
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self.inferior_crashing_expr()
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def set_breakpoint(self, line):
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lldbutil.run_break_set_by_file_and_line(
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self, "main.c", line, num_expected_locations=1, loc_exact=True
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)
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def check_stop_reason(self):
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# We should have one crashing thread
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self.assertEqual(
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len(
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lldbutil.get_crashed_threads(
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self, self.dbg.GetSelectedTarget().GetProcess()
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)
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),
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1,
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STOPPED_DUE_TO_EXC_BAD_ACCESS,
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)
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def get_api_stop_reason(self):
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return lldb.eStopReasonException
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number of the crash.
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self.line = line_number("main.c", "// Crash here.")
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def inferior_crashing(self):
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"""Inferior crashes upon launching; lldb should catch the event and stop."""
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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self.runCmd("run", RUN_SUCCEEDED)
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# The exact stop reason depends on the platform
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if self.platformIsDarwin():
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stop_reason = "stop reason = EXC_BAD_ACCESS"
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elif self.getPlatform() == "linux" or self.getPlatform() == "freebsd":
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stop_reason = "stop reason = signal SIGSEGV: address not mapped to object"
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else:
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stop_reason = "stop reason = invalid address"
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self.expect(
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"thread list",
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STOPPED_DUE_TO_EXC_BAD_ACCESS,
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substrs=["stopped", stop_reason],
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)
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# And it should report the correct line number.
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self.expect(
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"thread backtrace all", substrs=[stop_reason, "main.c:%d" % self.line]
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)
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def inferior_crashing_python(self):
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"""Inferior crashes upon launching; lldb should catch the event and stop."""
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exe = self.getBuildArtifact("a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Now launch the process, and do not stop at entry point.
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# Both argv and envp are null.
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process = target.LaunchSimple(None, None, self.get_process_working_directory())
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if process.GetState() != lldb.eStateStopped:
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self.fail(
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"Process should be in the 'stopped' state, "
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"instead the actual state is: '%s'"
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% lldbutil.state_type_to_str(process.GetState())
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)
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threads = lldbutil.get_crashed_threads(self, process)
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self.assertEqual(
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len(threads), 1, "Failed to stop the thread upon bad access exception"
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)
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if self.TraceOn():
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lldbutil.print_stacktrace(threads[0])
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def inferior_crashing_registers(self):
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"""Test that lldb can read registers after crashing."""
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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self.runCmd("run", RUN_SUCCEEDED)
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self.check_stop_reason()
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# lldb should be able to read from registers from the inferior after
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# crashing.
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lldbplatformutil.check_first_register_readable(self)
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def inferior_crashing_expr(self):
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"""Test that the lldb expression interpreter can read symbols after crashing."""
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exe = self.getBuildArtifact("a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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self.runCmd("run", RUN_SUCCEEDED)
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self.check_stop_reason()
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# The lldb expression interpreter should be able to read from addresses
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# of the inferior after a crash.
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self.expect("expression argc", startstr="(int) $0 = 1")
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self.expect("expression hello_world", substrs=["Hello"])
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