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"""
Test that the debugger handles loops in std::list (which can appear as a result of e.g. memory
corruption).
"""
from __future__ import print_function
import os
import time
import re
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class LibcxxListDataFormatterTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@skipIf(compiler="gcc")
@skipIfWindows # libc++ not ported to Windows yet
@add_test_categories(["pyapi"])
@skipIfDarwin # rdar://25499635
def test_with_run_command(self):
self.build()
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target and target.IsValid(), "Target is valid")
file_spec = lldb.SBFileSpec("main.cpp", False)
breakpoint1 = target.BreakpointCreateBySourceRegex(
'// Set break point at this line.', file_spec)
self.assertTrue(breakpoint1 and breakpoint1.IsValid())
breakpoint2 = target.BreakpointCreateBySourceRegex(
'// Set second break point at this line.', file_spec)
self.assertTrue(breakpoint2 and breakpoint2.IsValid())
# Run the program, it should stop at breakpoint 1.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
lldbutil.skip_if_library_missing(
self, target, lldbutil.PrintableRegex("libc\+\+"))
self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
self.assertEqual(
len(lldbutil.get_threads_stopped_at_breakpoint(process, breakpoint1)), 1)
# verify our list is displayed correctly
self.expect(
"frame variable *numbers_list",
substrs=[
'[0] = 1',
'[1] = 2',
'[2] = 3',
'[3] = 4',
'[5] = 6'])
# Continue to breakpoint 2.
process.Continue()
self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
self.assertEqual(
len(lldbutil.get_threads_stopped_at_breakpoint(process, breakpoint2)), 1)
# The list is now inconsistent. However, we should be able to get the first three
# elements at least (and most importantly, not crash).
self.expect(
"frame variable *numbers_list",
substrs=[
'[0] = 1',
'[1] = 2',
'[2] = 3'])
# Run to completion.
process.Continue()
self.assertEqual(process.GetState(), lldb.eStateExited, PROCESS_EXITED)
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