fd35a92300
from PEP8 (https://peps.python.org/pep-0008/#programming-recommendations): > Comparisons to singletons like None should always be done with is or is not, never the equality operators. Co-authored-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com>
100 lines
3.6 KiB
Python
100 lines
3.6 KiB
Python
"""
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Test calling a function that throws an ObjC exception, make sure that it doesn't propagate the exception.
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"""
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class ExprCommandWithThrowTestCase(TestBase):
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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self.main_source = "call-throws.m"
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self.main_source_spec = lldb.SBFileSpec(self.main_source)
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@add_test_categories(["objc"])
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def test(self):
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"""Test calling a function that throws and ObjC exception."""
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self.build()
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self.call_function()
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def check_after_call(self):
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# Check that we are back where we were before:
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frame = self.thread.GetFrameAtIndex(0)
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self.assertEqual(
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self.orig_frame_pc, frame.GetPC(), "Restored the zeroth frame correctly"
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)
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def call_function(self):
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"""Test calling function that throws."""
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(target, process, self.thread, bkpt) = lldbutil.run_to_source_breakpoint(
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self, "I am about to throw.", self.main_source_spec
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)
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options = lldb.SBExpressionOptions()
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options.SetUnwindOnError(True)
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frame = self.thread.GetFrameAtIndex(0)
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# Store away the PC to check that the functions unwind to the right
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# place after calls
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self.orig_frame_pc = frame.GetPC()
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value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
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self.assertTrue(value.IsValid())
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self.assertFalse(value.GetError().Success())
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self.check_after_call()
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# Okay, now try with a breakpoint in the called code in the case where
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# we are ignoring breakpoint hits.
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handler_bkpt = target.BreakpointCreateBySourceRegex(
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"I felt like it", self.main_source_spec
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)
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self.assertGreater(handler_bkpt.GetNumLocations(), 0)
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options.SetIgnoreBreakpoints(True)
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options.SetUnwindOnError(True)
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value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
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self.assertTrue(value.IsValid() and not value.GetError().Success())
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self.check_after_call()
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# Now set the ObjC language breakpoint and make sure that doesn't
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# interfere with the call:
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exception_bkpt = target.BreakpointCreateForException(
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lldb.eLanguageTypeObjC, False, True
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)
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self.assertGreater(exception_bkpt.GetNumLocations(), 0)
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options.SetIgnoreBreakpoints(True)
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options.SetUnwindOnError(True)
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value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
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self.assertTrue(value.IsValid() and not value.GetError().Success())
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self.check_after_call()
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# Now turn off exception trapping, and call a function that catches the exceptions,
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# and make sure the function actually completes, and we get the right
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# value:
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options.SetTrapExceptions(False)
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value = frame.EvaluateExpression("[my_class iCatchMyself]", options)
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self.assertTrue(value.IsValid())
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self.assertSuccess(value.GetError())
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self.assertEqual(value.GetValueAsUnsigned(), 57)
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self.check_after_call()
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options.SetTrapExceptions(True)
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# Now set this unwind on error to false, and make sure that we stop
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# where the exception was thrown
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options.SetUnwindOnError(False)
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value = frame.EvaluateExpression("[my_class callMeIThrow]", options)
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self.assertTrue(value.IsValid() and not value.GetError().Success())
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self.check_after_call()
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