1 """Test that lldb functions correctly after the inferior has crashed while in a recursive routine.""" 2 3 import os, time 4 import unittest2 5 import lldb, lldbutil 6 from lldbtest import * 7 8 class CrashingRecursiveInferiorTestCase(TestBase): 9 10 mydir = os.path.join("functionalities", "inferior-crashing", "recursive-inferior") 11 12 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 13 def test_recursive_inferior_crashing_dsym(self): 14 """Test that lldb reliably catches the inferior crashing (command).""" 15 self.buildDsym() 16 self.recursive_inferior_crashing() 17 18 @expectedFailureLinux('llvm.org/pr15415', ['gcc', 'clang']) # partial backtrace with -fomit-frame-pointer with tool-chains that support this option 19 def test_recursive_inferior_crashing_dwarf(self): 20 """Test that lldb reliably catches the inferior crashing (command).""" 21 self.buildDwarf() 22 self.recursive_inferior_crashing() 23 24 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 25 def test_recursive_inferior_crashing_registers_dsym(self): 26 """Test that lldb reliably reads registers from the inferior after crashing (command).""" 27 self.buildDsym() 28 self.recursive_inferior_crashing_registers() 29 30 def test_recursive_inferior_crashing_register_dwarf(self): 31 """Test that lldb reliably reads registers from the inferior after crashing (command).""" 32 self.buildDwarf() 33 self.recursive_inferior_crashing_registers() 34 35 @python_api_test 36 def test_recursive_inferior_crashing_python(self): 37 """Test that lldb reliably catches the inferior crashing (Python API).""" 38 self.buildDefault() 39 self.recursive_inferior_crashing_python() 40 41 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 42 def test_recursive_inferior_crashing_expr_dsym(self): 43 """Test that the lldb expression interpreter can read from the inferior after crashing (command).""" 44 self.buildDsym() 45 self.recursive_inferior_crashing_expr() 46 47 def test_recursive_inferior_crashing_expr_dwarf(self): 48 """Test that the lldb expression interpreter can read from the inferior after crashing (command).""" 49 self.buildDwarf() 50 self.recursive_inferior_crashing_expr() 51 52 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 53 def test_recursive_inferior_crashing_step_dsym(self): 54 """Test that lldb functions correctly after stepping through a crash.""" 55 self.buildDsym() 56 self.recursive_inferior_crashing_step() 57 58 def test_recursive_inferior_crashing_step_dwarf(self): 59 """Test that stepping after a crash behaves correctly.""" 60 self.buildDwarf() 61 self.recursive_inferior_crashing_step() 62 63 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 64 def test_recursive_inferior_crashing_step_after_break_dsym(self): 65 """Test that stepping after a crash behaves correctly.""" 66 self.buildDsym() 67 self.recursive_inferior_crashing_step_after_break() 68 69 def test_recursive_inferior_crashing_step_after_break_dwarf(self): 70 """Test that lldb functions correctly after stepping through a crash.""" 71 self.buildDwarf() 72 self.recursive_inferior_crashing_step_after_break() 73 74 @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin") 75 def test_recursive_inferior_crashing_expr_step_and_expr_dsym(self): 76 """Test that lldb expressions work before and after stepping after a crash.""" 77 self.buildDsym() 78 self.recursive_inferior_crashing_expr_step_expr() 79 80 @expectedFailureLinux # due to llvm.org/pr15415 with -fomit-frame-pointer, and pr15989 with ebp/rbp 81 def test_recursive_inferior_crashing_expr_step_and_expr_dwarf(self): 82 """Test that lldb expressions work before and after stepping after a crash.""" 83 self.buildDwarf() 84 self.recursive_inferior_crashing_expr_step_expr() 85 86 def set_breakpoint(self, line): 87 lldbutil.run_break_set_by_file_and_line (self, "main.c", line, num_expected_locations=1, loc_exact=True) 88 89 def check_stop_reason(self): 90 if sys.platform.startswith("darwin"): 91 stop_reason = 'stop reason = EXC_BAD_ACCESS' 92 else: 93 stop_reason = 'stop reason = invalid address' 94 95 # The stop reason of the thread should be a bad access exception. 96 self.expect("thread list", STOPPED_DUE_TO_EXC_BAD_ACCESS, 97 substrs = ['stopped', 98 stop_reason]) 99 100 return stop_reason 101 102 def setUp(self): 103 # Call super's setUp(). 104 TestBase.setUp(self) 105 # Find the line number of the crash. 106 self.line = line_number('main.c', '// Crash here.') 107 108 def recursive_inferior_crashing(self): 109 """Inferior crashes upon launching; lldb should catch the event and stop.""" 110 exe = os.path.join(os.getcwd(), "a.out") 111 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 112 113 self.runCmd("run", RUN_SUCCEEDED) 114 stop_reason = self.check_stop_reason() 115 116 # And it should report a backtrace that includes main and the crash site. 117 self.expect("thread backtrace all", 118 substrs = [stop_reason, 'main', 'argc', 'argv', 'recursive_function']) 119 120 # And it should report the correct line number. 121 self.expect("thread backtrace all", 122 substrs = [stop_reason, 123 'main.c:%d' % self.line]) 124 125 def recursive_inferior_crashing_python(self): 126 """Inferior crashes upon launching; lldb should catch the event and stop.""" 127 exe = os.path.join(os.getcwd(), "a.out") 128 129 target = self.dbg.CreateTarget(exe) 130 self.assertTrue(target, VALID_TARGET) 131 132 # Now launch the process, and do not stop at entry point. 133 # Both argv and envp are null. 134 process = target.LaunchSimple(None, None, os.getcwd()) 135 136 if process.GetState() != lldb.eStateStopped: 137 self.fail("Process should be in the 'stopped' state, " 138 "instead the actual state is: '%s'" % 139 lldbutil.state_type_to_str(process.GetState())) 140 141 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonException) 142 if not thread: 143 self.fail("Fail to stop the thread upon bad access exception") 144 145 if self.TraceOn(): 146 lldbutil.print_stacktrace(thread) 147 148 def recursive_inferior_crashing_registers(self): 149 """Test that lldb can read registers after crashing.""" 150 exe = os.path.join(os.getcwd(), "a.out") 151 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 152 153 self.runCmd("run", RUN_SUCCEEDED) 154 self.check_stop_reason() 155 156 # lldb should be able to read from registers from the inferior after crashing. 157 self.expect("register read eax", 158 substrs = ['eax = 0x']) 159 160 def recursive_inferior_crashing_expr(self): 161 """Test that the lldb expression interpreter can read symbols after crashing.""" 162 exe = os.path.join(os.getcwd(), "a.out") 163 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 164 165 self.runCmd("run", RUN_SUCCEEDED) 166 self.check_stop_reason() 167 168 # The lldb expression interpreter should be able to read from addresses of the inferior after a crash. 169 self.expect("p i", 170 startstr = '(int) $0 =') 171 172 def recursive_inferior_crashing_step(self): 173 """Test that lldb functions correctly after stepping through a crash.""" 174 exe = os.path.join(os.getcwd(), "a.out") 175 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 176 177 self.set_breakpoint(self.line) 178 self.runCmd("run", RUN_SUCCEEDED) 179 180 self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, 181 substrs = ['main.c:%d' % self.line, 182 'stop reason = breakpoint']) 183 184 self.runCmd("next") 185 stop_reason = self.check_stop_reason() 186 187 # The lldb expression interpreter should be able to read from addresses of the inferior after a crash. 188 self.expect("p i", 189 substrs = ['(int) $0 =']) 190 191 # lldb should be able to read from registers from the inferior after crashing. 192 self.expect("register read eax", 193 substrs = ['eax = 0x']) 194 195 # And it should report the correct line number. 196 self.expect("thread backtrace all", 197 substrs = [stop_reason, 198 'main.c:%d' % self.line]) 199 200 def recursive_inferior_crashing_step_after_break(self): 201 """Test that lldb behaves correctly when stepping after a crash.""" 202 exe = os.path.join(os.getcwd(), "a.out") 203 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 204 205 self.runCmd("run", RUN_SUCCEEDED) 206 self.check_stop_reason() 207 208 expected_state = 'exited' # Provide the exit code. 209 if sys.platform.startswith("darwin"): 210 expected_state = 'stopped' # TODO: Determine why 'next' and 'continue' have no effect after a crash. 211 212 self.expect("next", 213 substrs = ['Process', expected_state]) 214 215 self.expect("thread list", error=True, 216 substrs = ['Process must be launched']) 217 218 def recursive_inferior_crashing_expr_step_expr(self): 219 """Test that lldb expressions work before and after stepping after a crash.""" 220 exe = os.path.join(os.getcwd(), "a.out") 221 self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) 222 223 self.runCmd("run", RUN_SUCCEEDED) 224 self.check_stop_reason() 225 226 # The lldb expression interpreter should be able to read from addresses of the inferior after a crash. 227 self.expect("p null", 228 startstr = '(char *) $0 = 0x0') 229 230 self.runCmd("next") 231 232 # The lldb expression interpreter should be able to read from addresses of the inferior after a step. 233 self.expect("p null", 234 startstr = '(char *) $1 = 0x0') 235 236 self.check_stop_reason() 237 238 if __name__ == '__main__': 239 import atexit 240 lldb.SBDebugger.Initialize() 241 atexit.register(lambda: lldb.SBDebugger.Terminate()) 242 unittest2.main() 243
