f7b1a34e47
Extending ValueObjectDynamicValue so that it stores a TypeAndOrName instead of a TypeSP. This change allows us to reflect the notion that a ValueObject can have a dynamic type for which we have no debug information. Previously, we would coalesce that to the static type of the object, potentially losing relevant information or even getting it wrong. This fix ensures we can correctly report the class name for Cocoa objects whose types are hidden classes that we know nothing about (e.g. __NSArrayI for immutable arrays). As a side effect, our --show-types argument to frame variable no longer needs to append custom dynamic type information. llvm-svn: 173216
193 lines
8.2 KiB
Python
193 lines
8.2 KiB
Python
"""
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Use lldb Python API to test dynamic values in ObjC
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"""
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import os, time
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import re
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import unittest2
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import lldb, lldbutil
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from lldbtest import *
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class ObjCDynamicValueTestCase(TestBase):
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mydir = os.path.join("lang", "objc", "objc-dynamic-value")
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dsym_test
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def test_get_dynamic_objc_vals_with_dsym(self):
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"""Test fetching ObjC dynamic values."""
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if self.getArchitecture() == 'i386':
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# rdar://problem/9946499
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self.skipTest("Dynamic types for ObjC V1 runtime not implemented")
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self.buildDsym()
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self.do_get_dynamic_vals()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@python_api_test
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@dwarf_test
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def test_get_objc_dynamic_vals_with_dwarf(self):
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"""Test fetching ObjC dynamic values."""
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if self.getArchitecture() == 'i386':
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# rdar://problem/9946499
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self.skipTest("Dynamic types for ObjC V1 runtime not implemented")
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self.buildDwarf()
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self.do_get_dynamic_vals()
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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 number to break for main.c.
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self.source_name = 'dynamic-value.m'
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self.set_property_line = line_number(self.source_name, '// This is the line in setProperty, make sure we step to here.')
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self.handle_SourceBase = line_number(self.source_name,
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'// Break here to check dynamic values.')
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self.main_before_setProperty_line = line_number(self.source_name,
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'// Break here to see if we can step into real method.')
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def examine_SourceDerived_ptr (self, object):
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self.assertTrue (object)
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self.assertTrue (object.GetTypeName().find ('SourceDerived') != -1)
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derivedValue = object.GetChildMemberWithName ('_derivedValue')
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self.assertTrue (derivedValue)
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self.assertTrue (int (derivedValue.GetValue(), 0) == 30)
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def do_get_dynamic_vals(self):
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"""Make sure we get dynamic values correctly both for compiled in classes and dynamic ones"""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target from the debugger.
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target = self.dbg.CreateTarget (exe)
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self.assertTrue(target, VALID_TARGET)
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# Set up our breakpoints:
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handle_SourceBase_bkpt = target.BreakpointCreateByLocation(self.source_name, self.handle_SourceBase)
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self.assertTrue(handle_SourceBase_bkpt and
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handle_SourceBase_bkpt.GetNumLocations() == 1,
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VALID_BREAKPOINT)
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main_before_setProperty_bkpt = target.BreakpointCreateByLocation(self.source_name, self.main_before_setProperty_line)
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self.assertTrue(main_before_setProperty_bkpt and
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main_before_setProperty_bkpt.GetNumLocations() == 1,
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VALID_BREAKPOINT)
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# Now launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, os.getcwd())
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self.assertTrue(process.GetState() == lldb.eStateStopped,
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PROCESS_STOPPED)
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threads = lldbutil.get_threads_stopped_at_breakpoint (process, main_before_setProperty_bkpt)
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self.assertTrue (len(threads) == 1)
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thread = threads[0]
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#
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# At this point, myObserver has a Source pointer that is actually a KVO swizzled SourceDerived
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# make sure we can get that properly:
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frame = thread.GetFrameAtIndex(0)
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myObserver = frame.FindVariable('myObserver', lldb.eDynamicCanRunTarget)
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self.assertTrue (myObserver)
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myObserver_source = myObserver.GetChildMemberWithName ('_source', lldb.eDynamicCanRunTarget)
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self.examine_SourceDerived_ptr (myObserver_source)
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#
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# Make sure a static value can be correctly turned into a dynamic value.
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frame = thread.GetFrameAtIndex(0)
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myObserver_static = frame.FindVariable('myObserver', lldb.eNoDynamicValues)
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self.assertTrue (myObserver_static)
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myObserver = myObserver_static.GetDynamicValue (lldb.eDynamicCanRunTarget)
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myObserver_source = myObserver.GetChildMemberWithName ('_source', lldb.eDynamicCanRunTarget)
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self.examine_SourceDerived_ptr (myObserver_source)
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# The "frame var" code uses another path to get into children, so let's
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# make sure that works as well:
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result = lldb.SBCommandReturnObject()
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self.expect('frame var -d run-target myObserver->_source', 'frame var finds its way into a child member',
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patterns = ['\(SourceDerived \*\)'])
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# check that our ObjC GetISA() does a good job at hiding KVO swizzled classes
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self.expect('frame var -d run-target myObserver->_source -T', 'the KVO-ed class is hidden',
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substrs = ['SourceDerived'])
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self.expect('frame var -d run-target myObserver->_source -T', 'the KVO-ed class is hidden', matching = False,
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substrs = ['NSKVONotify'])
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# This test is not entirely related to the main thrust of this test case, but since we're here,
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# try stepping into setProperty, and make sure we get into the version in Source:
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thread.StepInto()
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threads = lldbutil.get_stopped_threads (process, lldb.eStopReasonPlanComplete)
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self.assertTrue (len(threads) == 1)
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line_entry = threads[0].GetFrameAtIndex(0).GetLineEntry()
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self.assertTrue (line_entry.GetLine() == self.set_property_line)
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self.assertTrue (line_entry.GetFileSpec().GetFilename() == self.source_name)
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# Okay, back to the main business. Continue to the handle_SourceBase and make sure we get the correct dynamic value.
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threads = lldbutil.continue_to_breakpoint (process, handle_SourceBase_bkpt)
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self.assertTrue (len(threads) == 1)
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thread = threads[0]
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frame = thread.GetFrameAtIndex(0)
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# Get "object" using FindVariable:
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noDynamic = lldb.eNoDynamicValues
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useDynamic = lldb.eDynamicCanRunTarget
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object_static = frame.FindVariable ('object', noDynamic)
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object_dynamic = frame.FindVariable ('object', useDynamic)
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# Delete this object to make sure that this doesn't cause havoc with the dynamic object that depends on it.
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del (object_static)
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self.examine_SourceDerived_ptr (object_dynamic)
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# Get "this" using FindValue, make sure that works too:
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object_static = frame.FindValue ('object', lldb.eValueTypeVariableArgument, noDynamic)
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object_dynamic = frame.FindValue ('object', lldb.eValueTypeVariableArgument, useDynamic)
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del (object_static)
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self.examine_SourceDerived_ptr (object_dynamic)
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# Get "this" using the EvaluateExpression:
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object_static = frame.EvaluateExpression ('object', noDynamic)
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object_dynamic = frame.EvaluateExpression ('object', useDynamic)
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del (object_static)
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self.examine_SourceDerived_ptr (object_dynamic)
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# Continue again to the handle_SourceBase and make sure we get the correct dynamic value.
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# This one looks exactly the same, but in fact this is an "un-KVO'ed" version of SourceBase, so
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# its isa pointer points to SourceBase not NSKVOSourceBase or whatever...
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threads = lldbutil.continue_to_breakpoint (process, handle_SourceBase_bkpt)
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self.assertTrue (len(threads) == 1)
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thread = threads[0]
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frame = thread.GetFrameAtIndex(0)
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# Get "object" using FindVariable:
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object_static = frame.FindVariable ('object', noDynamic)
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object_dynamic = frame.FindVariable ('object', useDynamic)
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# Delete this object to make sure that this doesn't cause havoc with the dynamic object that depends on it.
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del (object_static)
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self.examine_SourceDerived_ptr (object_dynamic)
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if __name__ == '__main__':
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import atexit
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lldb.SBDebugger.Initialize()
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atexit.register(lambda: lldb.SBDebugger.Terminate())
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unittest2.main()
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