136 lines · python
1"""Test that lldb functions correctly after the inferior has crashed."""2 3 4import lldb5from lldbsuite.test import lldbutil6from lldbsuite.test import lldbplatformutil7from lldbsuite.test.decorators import *8from lldbsuite.test.lldbtest import *9 10 11class CrashingInferiorTestCase(TestBase):12 @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")13 @expectedFailureNetBSD14 def test_inferior_crashing(self):15 """Test that lldb reliably catches the inferior crashing (command)."""16 self.build()17 self.inferior_crashing()18 19 def test_inferior_crashing_register(self):20 """Test that lldb reliably reads registers from the inferior after crashing (command)."""21 self.build()22 self.inferior_crashing_registers()23 24 @add_test_categories(["pyapi"])25 def test_inferior_crashing_python(self):26 """Test that lldb reliably catches the inferior crashing (Python API)."""27 self.build()28 self.inferior_crashing_python()29 30 def test_inferior_crashing_expr(self):31 """Test that the lldb expression interpreter can read from the inferior after crashing (command)."""32 self.build()33 self.inferior_crashing_expr()34 35 def set_breakpoint(self, line):36 lldbutil.run_break_set_by_file_and_line(37 self, "main.c", line, num_expected_locations=1, loc_exact=True38 )39 40 def check_stop_reason(self):41 # We should have one crashing thread42 self.assertEqual(43 len(44 lldbutil.get_crashed_threads(45 self, self.dbg.GetSelectedTarget().GetProcess()46 )47 ),48 1,49 STOPPED_DUE_TO_EXC_BAD_ACCESS,50 )51 52 def get_api_stop_reason(self):53 return lldb.eStopReasonException54 55 def setUp(self):56 # Call super's setUp().57 TestBase.setUp(self)58 # Find the line number of the crash.59 self.line = line_number("main.c", "// Crash here.")60 61 def inferior_crashing(self):62 """Inferior crashes upon launching; lldb should catch the event and stop."""63 exe = self.getBuildArtifact("a.out")64 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)65 66 self.runCmd("run", RUN_SUCCEEDED)67 # The exact stop reason depends on the platform68 if self.platformIsDarwin():69 stop_reason = "stop reason = EXC_BAD_ACCESS"70 elif self.getPlatform() == "linux" or self.getPlatform() == "freebsd":71 stop_reason = "stop reason = signal SIGSEGV: address not mapped to object"72 else:73 stop_reason = "stop reason = invalid address"74 self.expect(75 "thread list",76 STOPPED_DUE_TO_EXC_BAD_ACCESS,77 substrs=["stopped", stop_reason],78 )79 80 # And it should report the correct line number.81 self.expect(82 "thread backtrace all", substrs=[stop_reason, "main.c:%d" % self.line]83 )84 85 def inferior_crashing_python(self):86 """Inferior crashes upon launching; lldb should catch the event and stop."""87 exe = self.getBuildArtifact("a.out")88 89 target = self.dbg.CreateTarget(exe)90 self.assertTrue(target, VALID_TARGET)91 92 # Now launch the process, and do not stop at entry point.93 # Both argv and envp are null.94 process = target.LaunchSimple(None, None, self.get_process_working_directory())95 96 if process.GetState() != lldb.eStateStopped:97 self.fail(98 "Process should be in the 'stopped' state, "99 "instead the actual state is: '%s'"100 % lldbutil.state_type_to_str(process.GetState())101 )102 103 threads = lldbutil.get_crashed_threads(self, process)104 self.assertEqual(105 len(threads), 1, "Failed to stop the thread upon bad access exception"106 )107 108 if self.TraceOn():109 lldbutil.print_stacktrace(threads[0])110 111 def inferior_crashing_registers(self):112 """Test that lldb can read registers after crashing."""113 exe = self.getBuildArtifact("a.out")114 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)115 116 self.runCmd("run", RUN_SUCCEEDED)117 self.check_stop_reason()118 119 # lldb should be able to read from registers from the inferior after120 # crashing.121 lldbplatformutil.check_first_register_readable(self)122 123 def inferior_crashing_expr(self):124 """Test that the lldb expression interpreter can read symbols after crashing."""125 exe = self.getBuildArtifact("a.out")126 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)127 128 self.runCmd("run", RUN_SUCCEEDED)129 self.check_stop_reason()130 131 # The lldb expression interpreter should be able to read from addresses132 # of the inferior after a crash.133 self.expect("expression argc", startstr="(int) $0 = 1")134 135 self.expect("expression hello_world", substrs=["Hello"])136