artulab.com Git - openbsd/blob

   1 """Test that lldb functions correctly after the inferior has crashed."""
   2
   3
   4
   5 import lldb
   6 from lldbsuite.test import lldbutil
   7 from lldbsuite.test import lldbplatformutil
   8 from lldbsuite.test.decorators import *
   9 from lldbsuite.test.lldbtest import *
  10
  11
  12 class CrashingInferiorTestCase(TestBase):
  13
  14     mydir = TestBase.compute_mydir(__file__)
  15
  16     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
  17     @expectedFailureNetBSD
  18     def test_inferior_crashing(self):
  19         """Test that lldb reliably catches the inferior crashing (command)."""
  20         self.build()
  21         self.inferior_crashing()
  22
  23     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
  24     def test_inferior_crashing_register(self):
  25         """Test that lldb reliably reads registers from the inferior after crashing (command)."""
  26         self.build()
  27         self.inferior_crashing_registers()
  28
  29     @add_test_categories(['pyapi'])
  30     def test_inferior_crashing_python(self):
  31         """Test that lldb reliably catches the inferior crashing (Python API)."""
  32         self.build()
  33         self.inferior_crashing_python()
  34
  35     def test_inferior_crashing_expr(self):
  36         """Test that the lldb expression interpreter can read from the inferior after crashing (command)."""
  37         self.build()
  38         self.inferior_crashing_expr()
  39
  40     def set_breakpoint(self, line):
  41         lldbutil.run_break_set_by_file_and_line(
  42             self, "main.c", line, num_expected_locations=1, loc_exact=True)
  43
  44     def check_stop_reason(self):
  45         # We should have one crashing thread
  46         self.assertEqual(
  47             len(lldbutil.get_crashed_threads(self, self.dbg.GetSelectedTarget().GetProcess())),
  48             1,
  49             STOPPED_DUE_TO_EXC_BAD_ACCESS)
  50
  51     def get_api_stop_reason(self):
  52         return lldb.eStopReasonException
  53
  54     def setUp(self):
  55         # Call super's setUp().
  56         TestBase.setUp(self)
  57         # Find the line number of the crash.
  58         self.line = line_number('main.c', '// Crash here.')
  59
  60     def inferior_crashing(self):
  61         """Inferior crashes upon launching; lldb should catch the event and stop."""
  62         exe = self.getBuildArtifact("a.out")
  63         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  64
  65         self.runCmd("run", RUN_SUCCEEDED)
  66         # The exact stop reason depends on the platform
  67         if self.platformIsDarwin():
  68             stop_reason = 'stop reason = EXC_BAD_ACCESS'
  69         elif self.getPlatform() == "linux" or self.getPlatform() == "freebsd":
  70             stop_reason = 'stop reason = signal SIGSEGV'
  71         else:
  72             stop_reason = 'stop reason = invalid address'
  73         self.expect("thread list", STOPPED_DUE_TO_EXC_BAD_ACCESS,
  74                     substrs=['stopped',
  75                              stop_reason])
  76
  77         # And it should report the correct line number.
  78         self.expect("thread backtrace all",
  79                     substrs=[stop_reason,
  80                              'main.c:%d' % self.line])
  81
  82     def inferior_crashing_python(self):
  83         """Inferior crashes upon launching; lldb should catch the event and stop."""
  84         exe = self.getBuildArtifact("a.out")
  85
  86         target = self.dbg.CreateTarget(exe)
  87         self.assertTrue(target, VALID_TARGET)
  88
  89         # Now launch the process, and do not stop at entry point.
  90         # Both argv and envp are null.
  91         process = target.LaunchSimple(
  92             None, None, self.get_process_working_directory())
  93
  94         if process.GetState() != lldb.eStateStopped:
  95             self.fail("Process should be in the 'stopped' state, "
  96                       "instead the actual state is: '%s'" %
  97                       lldbutil.state_type_to_str(process.GetState()))
  98
  99         threads = lldbutil.get_crashed_threads(self, process)
 100         self.assertEqual(
 101             len(threads),
 102             1,
 103             "Failed to stop the thread upon bad access exception")
 104
 105         if self.TraceOn():
 106             lldbutil.print_stacktrace(threads[0])
 107
 108     def inferior_crashing_registers(self):
 109         """Test that lldb can read registers after crashing."""
 110         exe = self.getBuildArtifact("a.out")
 111         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
 112
 113         self.runCmd("run", RUN_SUCCEEDED)
 114         self.check_stop_reason()
 115
 116         # lldb should be able to read from registers from the inferior after
 117         # crashing.
 118         lldbplatformutil.check_first_register_readable(self)
 119
 120     def inferior_crashing_expr(self):
 121         """Test that the lldb expression interpreter can read symbols after crashing."""
 122         exe = self.getBuildArtifact("a.out")
 123         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
 124
 125         self.runCmd("run", RUN_SUCCEEDED)
 126         self.check_stop_reason()
 127
 128         # The lldb expression interpreter should be able to read from addresses
 129         # of the inferior after a crash.
 130         self.expect("p argc",
 131                     startstr='(int) $0 = 1')
 132
 133         self.expect("p hello_world",
 134                     substrs=['Hello'])