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"""Test that lldb functions 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 *
class CrashingInferiorTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@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()
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
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 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("p argc",
startstr='(int) $0 = 1')
self.expect("p hello_world",
substrs=['Hello'])
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