| """Test that lldb steps correctly after the inferior has crashed.""" | |
| import lldb | |
| from lldbsuite.test import lldbutil | |
| from lldbsuite.test import lldbplatformutil | |
| from lldbsuite.test.decorators import * | |
| from lldbsuite.test.lldbtest import * | |
| @requireNotWasm("wasm has no memory-protection faults/signals") | |
| class CrashingInferiorStepTestCase(TestBase): | |
| @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778") | |
| @expectedFailureNetBSD | |
| def test_inferior_crashing(self): | |
| """Test that lldb reliably catches the inferior crashing (command).""" | |
| self.build() | |
| self.inferior_crashing() | |
| def test_inferior_crashing_register(self): | |
| """Test that lldb reliably reads registers from the inferior after crashing (command).""" | |
| self.build() | |
| self.inferior_crashing_registers() | |
| @add_test_categories(["pyapi"]) | |
| def test_inferior_crashing_python(self): | |
| """Test that lldb reliably catches the inferior crashing (Python API).""" | |
| self.build() | |
| self.inferior_crashing_python() | |
| def test_inferior_crashing_expr(self): | |
| """Test that the lldb expression interpreter can read from the inferior after crashing (command).""" | |
| self.build() | |
| self.inferior_crashing_expr() | |
| def test_inferior_crashing_step(self): | |
| """Test that stepping after a crash behaves correctly.""" | |
| self.build() | |
| self.inferior_crashing_step() | |
| @skipIfTargetAndroid() # debuggerd interferes with this test on Android | |
| @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778") | |
| def test_inferior_crashing_step_after_break(self): | |
| """Test that lldb functions correctly after stepping through a crash.""" | |
| self.build() | |
| self.inferior_crashing_step_after_break() | |
| # Inferior exits after stepping after a segfault. This is working as | |
| # intended IMHO. | |
| @skipIf(oslist=["freebsd", "linux", "netbsd"]) | |
| def test_inferior_crashing_expr_step_and_expr(self): | |
| """Test that lldb expressions work before and after stepping after a crash.""" | |
| self.build() | |
| self.inferior_crashing_expr_step_expr() | |
| def set_breakpoint(self, line): | |
| lldbutil.run_break_set_by_file_and_line( | |
| self, "main.c", line, num_expected_locations=1, loc_exact=True | |
| ) | |
| def check_stop_reason(self): | |
| # We should have one crashing thread | |
| self.assertEqual( | |
| len( | |
| lldbutil.get_crashed_threads( | |
| self, self.dbg.GetSelectedTarget().GetProcess() | |
| ) | |
| ), | |
| 1, | |
| STOPPED_DUE_TO_EXC_BAD_ACCESS, | |
| ) | |
| def get_api_stop_reason(self): | |
| return lldb.eStopReasonException | |
| def setUp(self): | |
| # Call super's setUp(). | |
| TestBase.setUp(self) | |
| # Find the line number of the crash. | |
| self.line = line_number("main.c", "// Crash here.") | |
| def inferior_crashing(self): | |
| """Inferior crashes upon launching; lldb should catch the event and stop.""" | |
| exe = self.getBuildArtifact("a.out") | |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) | |
| self.runCmd("run", RUN_SUCCEEDED) | |
| # The exact stop reason depends on the platform | |
| if self.platformIsDarwin(): | |
| stop_reason = "stop reason = EXC_BAD_ACCESS" | |
| elif self.getPlatform() == "linux" or self.getPlatform() == "freebsd": | |
| stop_reason = "stop reason = signal SIGSEGV" | |
| else: | |
| stop_reason = "stop reason = invalid address" | |
| self.expect( | |
| "thread list", | |
| STOPPED_DUE_TO_EXC_BAD_ACCESS, | |
| substrs=["stopped", stop_reason], | |
| ) | |
| # And it should report the correct line number. | |
| self.expect( | |
| "thread backtrace all", substrs=[stop_reason, "main.c:%d" % self.line] | |
| ) | |
| def inferior_crashing_python(self): | |
| """Inferior crashes upon launching; lldb should catch the event and stop.""" | |
| exe = self.getBuildArtifact("a.out") | |
| target = self.dbg.CreateTarget(exe) | |
| self.assertTrue(target, VALID_TARGET) | |
| # Now launch the process, and do not stop at entry point. | |
| # Both argv and envp are null. | |
| process = target.LaunchSimple(None, None, self.get_process_working_directory()) | |
| if process.GetState() != lldb.eStateStopped: | |
| self.fail( | |
| "Process should be in the 'stopped' state, " | |
| "instead the actual state is: '%s'" | |
| % lldbutil.state_type_to_str(process.GetState()) | |
| ) | |
| threads = lldbutil.get_crashed_threads(self, process) | |
| self.assertEqual( | |
| len(threads), 1, "Failed to stop the thread upon bad access exception" | |
| ) | |
| if self.TraceOn(): | |
| lldbutil.print_stacktrace(threads[0]) | |
| def inferior_crashing_registers(self): | |
| """Test that lldb can read registers after crashing.""" | |
| exe = self.getBuildArtifact("a.out") | |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) | |
| self.runCmd("run", RUN_SUCCEEDED) | |
| self.check_stop_reason() | |
| # lldb should be able to read from registers from the inferior after | |
| # crashing. | |
| lldbplatformutil.check_first_register_readable(self) | |
| def inferior_crashing_expr(self): | |
| """Test that the lldb expression interpreter can read symbols after crashing.""" | |
| exe = self.getBuildArtifact("a.out") | |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) | |
| self.runCmd("run", RUN_SUCCEEDED) | |
| self.check_stop_reason() | |
| # The lldb expression interpreter should be able to read from addresses | |
| # of the inferior after a crash. | |
| self.expect("expression argc", startstr="(int) $0 = 1") | |
| self.expect("expression hello_world", substrs=["Hello"]) | |
| def inferior_crashing_step(self): | |
| """Test that lldb functions correctly after stepping through a crash.""" | |
| exe = self.getBuildArtifact("a.out") | |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) | |
| self.set_breakpoint(self.line) | |
| self.runCmd("run", RUN_SUCCEEDED) | |
| self.expect( | |
| "thread list", | |
| STOPPED_DUE_TO_BREAKPOINT, | |
| substrs=["main.c:%d" % self.line, "stop reason = breakpoint"], | |
| ) | |
| self.runCmd("next") | |
| self.check_stop_reason() | |
| # The lldb expression interpreter should be able to read from addresses | |
| # of the inferior after a crash. | |
| self.expect("expression argv[0]", substrs=["a.out"]) | |
| self.expect("expression null_ptr", substrs=["= 0x0"]) | |
| # lldb should be able to read from registers from the inferior after | |
| # crashing. | |
| lldbplatformutil.check_first_register_readable(self) | |
| # And it should report the correct line number. | |
| self.expect("thread backtrace all", substrs=["main.c:%d" % self.line]) | |
| @expectedFailureNetBSD | |
| def inferior_crashing_step_after_break(self): | |
| """Test that lldb behaves correctly when stepping after a crash.""" | |
| exe = self.getBuildArtifact("a.out") | |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) | |
| self.runCmd("run", RUN_SUCCEEDED) | |
| self.check_stop_reason() | |
| expected_state = "exited" # Provide the exit code. | |
| if self.platformIsDarwin(): | |
| # TODO: Determine why 'next' and 'continue' have no effect after a | |
| # crash. | |
| expected_state = "stopped" | |
| self.expect("next", substrs=["Process", expected_state]) | |
| if expected_state == "exited": | |
| self.expect("thread list", error=True, substrs=["process must be launched"]) | |
| else: | |
| self.check_stop_reason() | |
| def inferior_crashing_expr_step_expr(self): | |
| """Test that lldb expressions work before and after stepping after a crash.""" | |
| exe = self.getBuildArtifact("a.out") | |
| self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) | |
| self.runCmd("run", RUN_SUCCEEDED) | |
| self.check_stop_reason() | |
| # The lldb expression interpreter should be able to read from addresses | |
| # of the inferior after a crash. | |
| self.expect("expression argv[0]", substrs=["a.out"]) | |
| self.runCmd("next") | |
| self.check_stop_reason() | |
| # The lldb expression interpreter should be able to read from addresses | |
| # of the inferior after a crash. | |
| self.expect("expression argv[0]", substrs=["a.out"]) |