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"""Test that stepping in/out of trampolines works as expected.
"""
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class TestTrampoline(TestBase):
def setup(self, bkpt_str):
self.build()
_, _, thread, _ = lldbutil.run_to_source_breakpoint(
self, bkpt_str, lldb.SBFileSpec('main.c'))
return thread
def test_direct_call(self):
thread = self.setup('Break here for direct')
# Sanity check that we start out in the correct function.
name = thread.frames[0].GetFunctionName()
self.assertIn('direct_trampoline_call', name)
# Check that stepping in will take us directly to the trampoline target.
thread.StepInto()
name = thread.frames[0].GetFunctionName()
self.assertIn('foo', name)
# Check that stepping out takes us back to the trampoline caller.
thread.StepOut()
name = thread.frames[0].GetFunctionName()
self.assertIn('direct_trampoline_call', name)
# Check that stepping over the end of the trampoline target
# takes us back to the trampoline caller.
thread.StepInto()
thread.StepOver()
name = thread.frames[0].GetFunctionName()
self.assertIn('direct_trampoline_call', name)
def test_chained_call(self):
thread = self.setup('Break here for chained')
# Sanity check that we start out in the correct function.
name = thread.frames[0].GetFunctionName()
self.assertIn('chained_trampoline_call', name)
# Check that stepping in will take us directly to the trampoline target.
thread.StepInto()
name = thread.frames[0].GetFunctionName()
self.assertIn('foo', name)
# Check that stepping out takes us back to the trampoline caller.
thread.StepOut()
name = thread.frames[0].GetFunctionName()
self.assertIn('chained_trampoline_call', name)
# Check that stepping over the end of the trampoline target
# takes us back to the trampoline caller.
thread.StepInto()
thread.StepOver()
name = thread.frames[0].GetFunctionName()
self.assertIn('chained_trampoline_call', name)
def test_trampoline_after_nodebug(self):
thread = self.setup('Break here for nodebug then trampoline')
# Sanity check that we start out in the correct function.
name = thread.frames[0].GetFunctionName()
self.assertIn('trampoline_after_nodebug', name)
# Check that stepping in will take us directly to the trampoline target.
thread.StepInto()
name = thread.frames[0].GetFunctionName()
self.assertIn('foo', name)
# Check that stepping out takes us back to the trampoline caller.
thread.StepOut()
name = thread.frames[0].GetFunctionName()
self.assertIn('trampoline_after_nodebug', name)
# Check that stepping over the end of the trampoline target
# takes us back to the trampoline caller.
thread.StepInto()
thread.StepOver()
name = thread.frames[0].GetFunctionName()
self.assertIn('trampoline_after_nodebug', name)
def test_unused_target(self):
thread = self.setup('Break here for unused')
# Sanity check that we start out in the correct function.
name = thread.frames[0].GetFunctionName()
self.assertIn('unused_target', name)
# Check that stepping into a trampoline that doesn't call its target
# jumps back to its caller.
thread.StepInto()
name = thread.frames[0].GetFunctionName()
self.assertIn('unused_target', name)
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