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"""
Test embedded breakpoints, like `asm int 3;` in x86 or or `__debugbreak` on Windows.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class DebugBreakTestCase(TestBase):
@skipIf(archs=no_match(["i386", "i686", "x86_64"]))
@no_debug_info_test
def test_asm_int_3(self):
"""Test that intrinsics like `__debugbreak();` and `asm {"int3"}` are treated like breakpoints."""
self.build()
exe = self.getBuildArtifact("a.out")
# Run the program.
target = self.dbg.CreateTarget(exe)
process = target.LaunchSimple(None, None, self.get_process_working_directory())
# We've hit the first stop, so grab the frame.
self.assertState(process.GetState(), lldb.eStateStopped)
stop_reason = (
lldb.eStopReasonException
if (
lldbplatformutil.getPlatform() == "windows"
or lldbplatformutil.getPlatform() == "macosx"
)
else lldb.eStopReasonSignal
)
thread = lldbutil.get_stopped_thread(process, stop_reason)
self.assertIsNotNone(
thread, "Unable to find thread stopped at the __debugbreak()"
)
frame = thread.GetFrameAtIndex(0)
# We should be in function 'bar'.
self.assertTrue(frame.IsValid())
function_name = frame.GetFunctionName()
self.assertIn(
"bar", function_name, "Unexpected function name {}".format(function_name)
)
# We should be able to evaluate the parameter foo.
value = frame.EvaluateExpression("*foo")
self.assertEqual(value.GetValueAsSigned(), 42)
# The counter should be 1 at the first stop and increase by 2 for each
# subsequent stop.
counter = 1
while counter < 20:
value = frame.EvaluateExpression("count")
self.assertEqual(value.GetValueAsSigned(), counter)
counter += 2
process.Continue()
# The inferior should exit after the last iteration.
self.assertState(process.GetState(), lldb.eStateExited)
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