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"""Test stepping through ObjC method dispatch in various forms."""
import os, time
import unittest2
import lldb
import lldbutil
from lldbtest import *
class TestObjCStepping(TestBase):
mydir = os.path.join("lang", "objc", "objc-stepping")
@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
@python_api_test
def test_with_dsym_and_python_api(self):
"""Test stepping through ObjC method dispatch in various forms."""
self.buildDsym()
self.objc_stepping()
@python_api_test
def test_with_dwarf_and_python_api(self):
"""Test stepping through ObjC method dispatch in various forms."""
self.buildDwarf()
self.objc_stepping()
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line numbers that we will step to in main:
self.main_source = "stepping-tests.m"
self.source_randomMethod_line = line_number (self.main_source, '// Source randomMethod start line.')
self.sourceBase_randomMethod_line = line_number (self.main_source, '// SourceBase randomMethod start line.')
self.source_returnsStruct_start_line = line_number (self.main_source, '// Source returnsStruct start line.')
self.sourceBase_returnsStruct_start_line = line_number (self.main_source, '// SourceBase returnsStruct start line.')
def objc_stepping(self):
"""Use Python APIs to test stepping into ObjC methods."""
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
self.main_source_spec = lldb.SBFileSpec (self.main_source)
break1 = target.BreakpointCreateBySourceRegex ("// Set first breakpoint here.", self.main_source_spec)
self.assertTrue(break1, VALID_BREAKPOINT)
break2 = target.BreakpointCreateBySourceRegex ("// Set second breakpoint here.", self.main_source_spec)
self.assertTrue(break2, VALID_BREAKPOINT)
break3 = target.BreakpointCreateBySourceRegex ('// Set third breakpoint here.', self.main_source_spec)
self.assertTrue(break3, VALID_BREAKPOINT)
break4 = target.BreakpointCreateBySourceRegex ('// Set fourth breakpoint here.', self.main_source_spec)
self.assertTrue(break4, VALID_BREAKPOINT)
break5 = target.BreakpointCreateBySourceRegex ('// Set fifth breakpoint here.', self.main_source_spec)
self.assertTrue(break5, VALID_BREAKPOINT)
break_returnStruct_call_super = target.BreakpointCreateBySourceRegex ('// Source returnsStruct call line.', self.main_source_spec)
self.assertTrue(break_returnStruct_call_super, VALID_BREAKPOINT)
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple (None, None, os.getcwd())
self.assertTrue(process, PROCESS_IS_VALID)
# The stop reason of the thread should be breakpoint.
threads = lldbutil.get_threads_stopped_at_breakpoint (process, break1)
if len(threads) != 1:
self.fail ("Failed to stop at breakpoint 1.")
thread = threads[0]
mySource = thread.GetFrameAtIndex(0).FindVariable("mySource")
self.assertTrue(mySource, "Found mySource local variable.")
mySource_isa = mySource.GetChildMemberWithName ("isa")
self.assertTrue(mySource_isa, "Found mySource->isa local variable.")
mySource_isa.GetValue ()
if self.TraceOn():
print mySource_isa
# Lets delete mySource so we can check that after stepping a child variable
# with no parent persists and is useful.
del (mySource)
# Now step in, that should leave us in the Source randomMethod:
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.source_randomMethod_line, "Stepped into Source randomMethod.")
# Now step in again, through the super call, and that should leave us in the SourceBase randomMethod:
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.sourceBase_randomMethod_line, "Stepped through super into SourceBase randomMethod.")
threads = lldbutil.continue_to_breakpoint (process, break2)
self.assertTrue (len(threads) == 1, "Continued to second breakpoint in main.")
# Again, step in twice gets us to a stret method and a stret super call:
thread = threads[0]
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.source_returnsStruct_start_line, "Stepped into Source returnsStruct.")
threads = lldbutil.continue_to_breakpoint (process, break_returnStruct_call_super)
self.assertTrue (len(threads) == 1, "Stepped to the call super line in Source returnsStruct.")
thread = threads[0]
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.sourceBase_returnsStruct_start_line, "Stepped through super into SourceBase returnsStruct.")
# Cool now continue to get past the call that intializes the Observer, and then do our steps in again to see that
# we can find our way when we're stepping through a KVO swizzled object.
threads = lldbutil.continue_to_breakpoint (process, break3)
self.assertTrue (len(threads) == 1, "Continued to third breakpoint in main, our object should now be swizzled.")
mySource_isa.GetValue ()
did_change = mySource_isa.GetValueDidChange ()
if self.TraceOn():
print mySource_isa
self.assertTrue (did_change, "The isa did indeed change, swizzled!")
# Now step in, that should leave us in the Source randomMethod:
thread = threads[0]
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.source_randomMethod_line, "Stepped into Source randomMethod in swizzled object.")
# Now step in again, through the super call, and that should leave us in the SourceBase randomMethod:
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.sourceBase_randomMethod_line, "Stepped through super into SourceBase randomMethod in swizzled object.")
threads = lldbutil.continue_to_breakpoint (process, break4)
self.assertTrue (len(threads) == 1, "Continued to fourth breakpoint in main.")
thread = threads[0]
# Again, step in twice gets us to a stret method and a stret super call:
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.source_returnsStruct_start_line, "Stepped into Source returnsStruct in swizzled object.")
threads = lldbutil.continue_to_breakpoint(process, break_returnStruct_call_super)
self.assertTrue (len(threads) == 1, "Stepped to the call super line in Source returnsStruct - second time.")
thread = threads[0]
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.sourceBase_returnsStruct_start_line, "Stepped through super into SourceBase returnsStruct in swizzled object.")
if __name__ == '__main__':
import atexit
lldb.SBDebugger.Initialize()
atexit.register(lambda: lldb.SBDebugger.Terminate())
unittest2.main()
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