"""Test that lldb steps correctly after the inferior has crashed while in a recursive routine."""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbplatformutil
from lldbsuite.test import lldbutil
class CrashingRecursiveInferiorStepTestCase(TestBase):
def test_recursive_inferior_crashing_step(self):
"""Test that stepping after a crash behaves correctly."""
self.build()
self.recursive_inferior_crashing_step()
@skipIfTargetAndroid() # debuggerd interferes with this test on Android
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24778")
@expectedFailureNetBSD
def test_recursive_inferior_crashing_step_after_break(self):
"""Test that lldb functions correctly after stepping through a crash."""
self.build()
self.recursive_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_recursive_inferior_crashing_expr_step_and_expr(self):
"""Test that lldb expressions work before and after stepping after a crash."""
self.build()
self.recursive_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 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 recursive_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 i", substrs=["(int) $0 ="])
# 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])
def recursive_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 recursive_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 null", startstr="(char *) $0 = 0x0")
self.runCmd("next")
# The lldb expression interpreter should be able to read from addresses
# of the inferior after a step.
self.expect("expression null", startstr="(char *) $1 = 0x0")
self.check_stop_reason()
Codebase Browser
llvm