forked from OSchip/llvm-project
173 lines
8.2 KiB
Python
173 lines
8.2 KiB
Python
"""Test stepping through ObjC method dispatch in various forms."""
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from __future__ import print_function
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import os, time
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import lldb
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import lldbsuite.test.lldbutil as lldbutil
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from lldbsuite.test.lldbtest import *
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class TestObjCStepping(TestBase):
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def getCategories (self):
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return ['basic_process']
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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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# Find the line numbers that we will step to in main:
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self.main_source = "stepping-tests.m"
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self.source_randomMethod_line = line_number (self.main_source, '// Source randomMethod start line.')
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self.sourceBase_randomMethod_line = line_number (self.main_source, '// SourceBase randomMethod start line.')
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self.source_returnsStruct_start_line = line_number (self.main_source, '// Source returnsStruct start line.')
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self.sourceBase_returnsStruct_start_line = line_number (self.main_source, '// SourceBase returnsStruct start line.')
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self.stepped_past_nil_line = line_number (self.main_source, '// Step over nil should stop here.')
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@skipUnlessDarwin
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@add_test_categories(['pyapi'])
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def test_with_python_api(self):
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"""Test stepping through ObjC method dispatch in various forms."""
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self.build()
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exe = os.path.join(os.getcwd(), "a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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self.main_source_spec = lldb.SBFileSpec (self.main_source)
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breakpoints_to_disable = []
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break1 = target.BreakpointCreateBySourceRegex ("// Set first breakpoint here.", self.main_source_spec)
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self.assertTrue(break1, VALID_BREAKPOINT)
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breakpoints_to_disable.append (break1)
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break2 = target.BreakpointCreateBySourceRegex ("// Set second breakpoint here.", self.main_source_spec)
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self.assertTrue(break2, VALID_BREAKPOINT)
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breakpoints_to_disable.append (break2)
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break3 = target.BreakpointCreateBySourceRegex ('// Set third breakpoint here.', self.main_source_spec)
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self.assertTrue(break3, VALID_BREAKPOINT)
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breakpoints_to_disable.append (break3)
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break4 = target.BreakpointCreateBySourceRegex ('// Set fourth breakpoint here.', self.main_source_spec)
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self.assertTrue(break4, VALID_BREAKPOINT)
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breakpoints_to_disable.append (break4)
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break5 = target.BreakpointCreateBySourceRegex ('// Set fifth breakpoint here.', self.main_source_spec)
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self.assertTrue(break5, VALID_BREAKPOINT)
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breakpoints_to_disable.append (break5)
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break_returnStruct_call_super = target.BreakpointCreateBySourceRegex ('// Source returnsStruct call line.', self.main_source_spec)
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self.assertTrue(break_returnStruct_call_super, VALID_BREAKPOINT)
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breakpoints_to_disable.append (break_returnStruct_call_super)
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break_step_nil = target.BreakpointCreateBySourceRegex ('// Set nil step breakpoint here.', self.main_source_spec)
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self.assertTrue(break_step_nil, VALID_BREAKPOINT)
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# Now launch the process, and do not stop at 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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# The stop reason of the thread should be breakpoint.
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threads = lldbutil.get_threads_stopped_at_breakpoint (process, break1)
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if len(threads) != 1:
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self.fail ("Failed to stop at breakpoint 1.")
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thread = threads[0]
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mySource = thread.GetFrameAtIndex(0).FindVariable("mySource")
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self.assertTrue(mySource, "Found mySource local variable.")
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mySource_isa = mySource.GetChildMemberWithName ("isa")
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self.assertTrue(mySource_isa, "Found mySource->isa local variable.")
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className = mySource_isa.GetSummary ()
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if self.TraceOn():
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print(mySource_isa)
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# Lets delete mySource so we can check that after stepping a child variable
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# with no parent persists and is useful.
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del (mySource)
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# Now step in, that should leave us in the Source randomMethod:
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.source_randomMethod_line, "Stepped into Source randomMethod.")
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# Now step in again, through the super call, and that should leave us in the SourceBase randomMethod:
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.sourceBase_randomMethod_line, "Stepped through super into SourceBase randomMethod.")
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threads = lldbutil.continue_to_breakpoint (process, break2)
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self.assertTrue (len(threads) == 1, "Continued to second breakpoint in main.")
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# Again, step in twice gets us to a stret method and a stret super call:
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thread = threads[0]
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.source_returnsStruct_start_line, "Stepped into Source returnsStruct.")
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threads = lldbutil.continue_to_breakpoint (process, break_returnStruct_call_super)
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self.assertTrue (len(threads) == 1, "Stepped to the call super line in Source returnsStruct.")
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thread = threads[0]
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.sourceBase_returnsStruct_start_line, "Stepped through super into SourceBase returnsStruct.")
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# Cool now continue to get past the call that initializes the Observer, and then do our steps in again to see that
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# we can find our way when we're stepping through a KVO swizzled object.
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threads = lldbutil.continue_to_breakpoint (process, break3)
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self.assertTrue (len(threads) == 1, "Continued to third breakpoint in main, our object should now be swizzled.")
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newClassName = mySource_isa.GetSummary ()
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if self.TraceOn():
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print(mySource_isa)
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self.assertTrue (newClassName != className, "The isa did indeed change, swizzled!")
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# Now step in, that should leave us in the Source randomMethod:
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thread = threads[0]
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.source_randomMethod_line, "Stepped into Source randomMethod in swizzled object.")
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# Now step in again, through the super call, and that should leave us in the SourceBase randomMethod:
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.sourceBase_randomMethod_line, "Stepped through super into SourceBase randomMethod in swizzled object.")
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threads = lldbutil.continue_to_breakpoint (process, break4)
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self.assertTrue (len(threads) == 1, "Continued to fourth breakpoint in main.")
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thread = threads[0]
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# Again, step in twice gets us to a stret method and a stret super call:
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.source_returnsStruct_start_line, "Stepped into Source returnsStruct in swizzled object.")
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threads = lldbutil.continue_to_breakpoint(process, break_returnStruct_call_super)
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self.assertTrue (len(threads) == 1, "Stepped to the call super line in Source returnsStruct - second time.")
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thread = threads[0]
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.sourceBase_returnsStruct_start_line, "Stepped through super into SourceBase returnsStruct in swizzled object.")
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for bkpt in breakpoints_to_disable:
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bkpt.SetEnabled(False)
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threads = lldbutil.continue_to_breakpoint (process, break_step_nil)
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self.assertTrue (len(threads) == 1, "Continued to step nil breakpoint.")
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thread.StepInto()
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line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
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self.assertTrue (line_number == self.stepped_past_nil_line, "Step in over dispatch to nil stepped over.")
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