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"""
Test lldb exception breakpoint command for CPP.
"""
from __future__ import print_function
import os
import time
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class CPPBreakpointTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
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 = os.path.join(os.getcwd(), "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.assertTrue(
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.assertTrue(
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.assertTrue(len(stopped_threads) == 1)
thread = stopped_threads[0]
frame_functions = lldbutil.get_function_names(thread)
self.assertTrue(
frame_functions.count("throws_exception_on_even(int)") == 0,
"At catch our throw function is off the stack")
self.assertTrue(
frame_functions.count("intervening_function(int)") == 0,
"At catch our intervening function is off the stack")
self.assertTrue(
frame_functions.count("catches_exception(int)") == 1,
"At catch our catch function is on the stack")
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