forked from OSchip/llvm-project
114 lines
4.2 KiB
Python
114 lines
4.2 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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from __future__ import print_function
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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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mydir = TestBase.compute_mydir(__file__)
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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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@skipUnlessDarwin
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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.assertTrue (self.orig_frame_pc == frame.GetPC(), "Restored the zeroth frame correctly")
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def call_function(self):
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"""Test calling function that throws."""
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exe_name = "a.out"
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exe = os.path.join(os.getcwd(), exe_name)
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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breakpoint = target.BreakpointCreateBySourceRegex('I am about to throw.',self.main_source_spec)
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self.assertTrue(breakpoint.GetNumLocations() > 0, VALID_BREAKPOINT)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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# Frame #0 should be at our breakpoint.
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threads = lldbutil.get_threads_stopped_at_breakpoint (process, breakpoint)
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self.assertTrue(len(threads) == 1)
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self.thread = threads[0]
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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 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.assertTrue (value.GetError().Success() == False)
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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("I felt like it", self.main_source_spec)
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self.assertTrue (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 value.GetError().Success() == False)
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self.check_after_call()
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# Now set the ObjC language breakpoint and make sure that doesn't interfere with the call:
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exception_bkpt = target.BreakpointCreateForException (lldb.eLanguageTypeObjC, False, True)
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self.assertTrue(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 value.GetError().Success() == False)
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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 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.assertTrue (value.GetError().Success() == True)
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self.assertTrue (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 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 value.GetError().Success() == False)
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self.check_after_call()
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