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"""
Test lldb ability to unwind a stack with a function containing a call to the
'__builtin_trap' intrinsic, which GCC (4.6) encodes to an illegal opcode.
"""
from __future__ import print_function
import os
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class BuiltinTrapTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break at.
self.line = line_number('main.cpp', '// Set break point at this line.')
# gcc generates incorrect linetable
@expectedFailureAll(archs="arm", compiler="gcc", triple=".*-android")
@expectedFailureAll(oslist=['linux'], archs=['arm'])
@skipIfWindows
def test_with_run_command(self):
"""Test that LLDB handles a function with __builtin_trap correctly."""
self.build()
self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
lldbutil.run_break_set_by_file_and_line(self, "main.cpp", self.line,
num_expected_locations=1,
loc_exact=True)
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs=['stopped',
'stop reason = breakpoint'])
# print backtrace, expect both 'bar' and 'main' functions to be listed
self.expect('bt', substrs=['bar', 'main'])
# go up one frame
self.runCmd("up", RUN_SUCCEEDED)
# evaluate a local
self.expect('p foo', substrs=['= 5'])
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