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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.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class BuiltinTrapTestCase(TestBase):
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(archs=["aarch64"], oslist=no_match(["freebsd", "linux"]))
@skipIfWindows
def test_with_run_command(self):
"""Test that LLDB handles a function with __builtin_trap correctly."""
self.build()
self.runCmd("file " + self.getBuildArtifact("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("expression foo", substrs=["= 5"])
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