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"""
LLDB AppKit formatters
Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
See https://llvm.org/LICENSE.txt for license information.
SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
"""
# example summary provider for NSBundle
# the real summary is now C++ code built into LLDB
import lldb
import ctypes
import lldb.runtime.objc.objc_runtime
import lldb.formatters.metrics
import NSURL
import lldb.formatters.Logger
statistics = lldb.formatters.metrics.Metrics()
statistics.add_metric('invalid_isa')
statistics.add_metric('invalid_pointer')
statistics.add_metric('unknown_class')
statistics.add_metric('code_notrun')
# despite the similary to synthetic children providers, these classes are not
# trying to provide anything but a summary for an NSURL, so they need not
# obey the interface specification for synthetic children providers
class NSBundleKnown_SummaryProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, params):
logger = lldb.formatters.Logger.Logger()
self.valobj = valobj
self.sys_params = params
if not(self.sys_params.types_cache.NSString):
self.sys_params.types_cache.NSString = self.valobj.GetTarget(
).FindFirstType('NSString').GetPointerType()
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# we need to skip the ISA, plus four other values
# that are luckily each a pointer in size
# which makes our computation trivial :-)
def offset(self):
logger = lldb.formatters.Logger.Logger()
return 5 * self.sys_params.pointer_size
def url_text(self):
logger = lldb.formatters.Logger.Logger()
global statistics
text = self.valobj.CreateChildAtOffset(
"text", self.offset(), self.sys_params.types_cache.NSString)
my_string = text.GetSummary()
if (my_string is None) or (my_string == ''):
statistics.metric_hit(
'unknown_class', str(
self.valobj.GetName()) + " triggered unknown pointer location")
return NSBundleUnknown_SummaryProvider(
self.valobj, self.sys_params).url_text()
else:
statistics.metric_hit('code_notrun', self.valobj)
return my_string
class NSBundleUnknown_SummaryProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, params):
logger = lldb.formatters.Logger.Logger()
self.valobj = valobj
self.sys_params = params
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
def url_text(self):
logger = lldb.formatters.Logger.Logger()
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
expr = "(NSString*)[" + stream.GetData() + " bundlePath]"
url_text_vo = self.valobj.CreateValueFromExpression("path", expr)
if url_text_vo.IsValid():
return url_text_vo.GetSummary()
return '<variable is not NSBundle>'
def GetSummary_Impl(valobj):
logger = lldb.formatters.Logger.Logger()
global statistics
class_data, wrapper = lldb.runtime.objc.objc_runtime.Utilities.prepare_class_detection(
valobj, statistics)
if wrapper:
return wrapper
name_string = class_data.class_name()
logger >> "class name is: " + str(name_string)
if name_string == 'NSBundle':
wrapper = NSBundleKnown_SummaryProvider(valobj, class_data.sys_params)
# [NSBundle mainBundle] does return an object that is
# not correctly filled out for our purposes, so we still
# end up having to run code in that case
# statistics.metric_hit('code_notrun',valobj)
else:
wrapper = NSBundleUnknown_SummaryProvider(
valobj, class_data.sys_params)
statistics.metric_hit(
'unknown_class',
valobj.GetName() +
" seen as " +
name_string)
return wrapper
def NSBundle_SummaryProvider(valobj, dict):
logger = lldb.formatters.Logger.Logger()
provider = GetSummary_Impl(valobj)
if provider is not None:
if isinstance(
provider,
lldb.runtime.objc.objc_runtime.SpecialSituation_Description):
return provider.message()
try:
summary = provider.url_text()
except:
summary = None
logger >> "got summary " + str(summary)
if summary is None or summary == '':
summary = '<variable is not NSBundle>'
return summary
return 'Summary Unavailable'
def __lldb_init_module(debugger, dict):
debugger.HandleCommand(
"type summary add -F NSBundle.NSBundle_SummaryProvider NSBundle")
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