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"""
Test lldb exception breakpoint command for CPP.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class CPPBreakpointTestCase(TestBase):
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
self.source = "exceptions.cpp"
self.catch_line = line_number(
self.source, "// This is the line you should stop at for catch"
)
@expectedFailureAll(
oslist=["windows"],
bugnumber="llvm.org/pr24538, clang-cl does not support throw or catch",
)
def test(self):
"""Test lldb exception breakpoint command for CPP."""
self.build()
exe = self.getBuildArtifact("a.out")
# Create a target from the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
exception_bkpt = target.BreakpointCreateForException(
lldb.eLanguageTypeC_plus_plus, True, True
)
self.assertTrue(exception_bkpt, "Made an exception breakpoint")
# Now run, and make sure we hit our breakpoint:
process = target.LaunchSimple(None, None, self.get_process_working_directory())
self.assertTrue(process, "Got a valid process")
stopped_threads = []
stopped_threads = lldbutil.get_threads_stopped_at_breakpoint(
process, exception_bkpt
)
self.assertEqual(
len(stopped_threads), 1, "Stopped at our exception breakpoint."
)
thread = stopped_threads[0]
# Make sure our throw function is still above us on the stack:
frame_functions = lldbutil.get_function_names(thread)
self.assertEqual(
frame_functions.count("throws_exception_on_even(int)"),
1,
"Our throw function is still on the stack.",
)
# Okay we hit our exception throw breakpoint, now make sure we get our catch breakpoint.
# One potential complication is that we might hit a couple of the exception breakpoints in getting out of the throw.
# so loop till we don't see the throws function on the stack. We should stop one more time for our exception breakpoint
# and that should be the catch...
while frame_functions.count("throws_exception_on_even(int)") == 1:
stopped_threads = lldbutil.continue_to_breakpoint(process, exception_bkpt)
self.assertEqual(len(stopped_threads), 1)
thread = stopped_threads[0]
frame_functions = lldbutil.get_function_names(thread)
self.assertEqual(
frame_functions.count("throws_exception_on_even(int)"),
0,
"At catch our throw function is off the stack",
)
self.assertEqual(
frame_functions.count("intervening_function(int)"),
0,
"At catch our intervening function is off the stack",
)
self.assertEqual(
frame_functions.count("catches_exception(int)"),
1,
"At catch our catch function is on the stack",
)
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