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"""
Test that we can backtrace correctly with 'sigtramp' functions on the stack
"""
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 SigtrampUnwind(TestBase):
mydir = TestBase.compute_mydir(__file__)
# On different platforms the "_sigtramp" and "__kill" frames are likely to be different.
# This test could probably be adapted to run on linux/*bsd easily enough.
@skipUnlessDarwin
@expectedFailureAll(oslist=["ios", "watchos", "tvos", "bridgeos"], bugnumber="<rdar://problem/34006863>") # lldb skips 1 frame on arm64 above _sigtramp
def test(self):
"""Test that we can backtrace correctly with _sigtramp on the stack"""
self.build()
self.setTearDownCleanup()
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
lldbutil.run_break_set_by_file_and_line(self, "main.c", line_number(
'main.c', '// Set breakpoint here'), num_expected_locations=1)
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
if not process:
self.fail("SBTarget.Launch() failed")
if process.GetState() != lldb.eStateStopped:
self.fail("Process should be in the 'stopped' state, "
"instead the actual state is: '%s'" %
lldbutil.state_type_to_str(process.GetState()))
self.expect(
"pro handle -n false -p true -s false SIGUSR1",
"Have lldb pass SIGUSR1 signals",
substrs=[
"SIGUSR1",
"true",
"false",
"false"])
lldbutil.run_break_set_by_symbol(
self,
"handler",
num_expected_locations=1,
module_name="a.out")
self.runCmd("continue")
thread = process.GetThreadAtIndex(0)
found_handler = False
found_sigtramp = False
found_kill = False
found_main = False
for f in thread.frames:
if f.GetFunctionName() == "handler":
found_handler = True
if f.GetFunctionName() == "_sigtramp":
found_sigtramp = True
if f.GetFunctionName() == "__kill":
found_kill = True
if f.GetFunctionName() == "main":
found_main = True
if self.TraceOn():
print("Backtrace once we're stopped:")
for f in thread.frames:
print(" %d %s" % (f.GetFrameID(), f.GetFunctionName()))
if not found_handler:
self.fail("Unable to find handler() in backtrace.")
if not found_sigtramp:
self.fail("Unable to find _sigtramp() in backtrace.")
if not found_kill:
self.fail("Unable to find kill() in backtrace.")
if not found_main:
self.fail("Unable to find main() in backtrace.")
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