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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.lldbtest import *
import lldbsuite.test.lldbutil as 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.')
@expectedFailureAll("llvm.org/pr15936", compiler="gcc", compiler_version=["<=","4.6"])
@expectedFailureAll(archs="arm", compiler="gcc", triple=".*-android") # gcc generates incorrect linetable
@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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