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"""Test stepping through ObjC method dispatch in various forms."""
from __future__ import print_function
import os, time
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
class TestObjCStepping(TestBase):
def getCategories (self):
return ['basic_process']
mydir = TestBase.compute_mydir(__file__)
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.')
self.stepped_past_nil_line = line_number (self.main_source, '// Step over nil should stop here.')
@skipUnlessDarwin
@add_test_categories(['pyapi'])
def test_with_python_api(self):
"""Test stepping through ObjC method dispatch in various forms."""
self.build()
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)
breakpoints_to_disable = []
break1 = target.BreakpointCreateBySourceRegex ("// Set first breakpoint here.", self.main_source_spec)
self.assertTrue(break1, VALID_BREAKPOINT)
breakpoints_to_disable.append (break1)
break2 = target.BreakpointCreateBySourceRegex ("// Set second breakpoint here.", self.main_source_spec)
self.assertTrue(break2, VALID_BREAKPOINT)
breakpoints_to_disable.append (break2)
break3 = target.BreakpointCreateBySourceRegex ('// Set third breakpoint here.', self.main_source_spec)
self.assertTrue(break3, VALID_BREAKPOINT)
breakpoints_to_disable.append (break3)
break4 = target.BreakpointCreateBySourceRegex ('// Set fourth breakpoint here.', self.main_source_spec)
self.assertTrue(break4, VALID_BREAKPOINT)
breakpoints_to_disable.append (break4)
break5 = target.BreakpointCreateBySourceRegex ('// Set fifth breakpoint here.', self.main_source_spec)
self.assertTrue(break5, VALID_BREAKPOINT)
breakpoints_to_disable.append (break5)
break_returnStruct_call_super = target.BreakpointCreateBySourceRegex ('// Source returnsStruct call line.', self.main_source_spec)
self.assertTrue(break_returnStruct_call_super, VALID_BREAKPOINT)
breakpoints_to_disable.append (break_returnStruct_call_super)
break_step_nil = target.BreakpointCreateBySourceRegex ('// Set nil step breakpoint here.', self.main_source_spec)
self.assertTrue(break_step_nil, VALID_BREAKPOINT)
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple (None, None, self.get_process_working_directory())
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.")
className = mySource_isa.GetSummary ()
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 initializes 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.")
newClassName = mySource_isa.GetSummary ()
if self.TraceOn():
print(mySource_isa)
self.assertTrue (newClassName != className, "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.")
for bkpt in breakpoints_to_disable:
bkpt.SetEnabled(False)
threads = lldbutil.continue_to_breakpoint (process, break_step_nil)
self.assertTrue (len(threads) == 1, "Continued to step nil breakpoint.")
thread.StepInto()
line_number = thread.GetFrameAtIndex(0).GetLineEntry().GetLine()
self.assertTrue (line_number == self.stepped_past_nil_line, "Step in over dispatch to nil stepped over.")
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