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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
"""
# summary provider for NSURL
import lldb
import ctypes
import lldb.runtime.objc.objc_runtime
import lldb.formatters.metrics
import CFString
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 NSURLKnown_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()
if not(self.sys_params.types_cache.NSURL):
self.sys_params.types_cache.NSURL = self.valobj.GetTarget(
).FindFirstType('NSURL').GetPointerType()
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# one pointer is the ISA
# then there is one more pointer and 8 bytes of plain data
# (which are also present on a 32-bit system)
# then there is a pointer to an NSString which is the url text
# optionally, the next pointer is another NSURL which is the "base"
# of this one when doing NSURLs composition (incidentally, NSURLs can
# recurse the base+text mechanism to any desired depth)
def offset_text(self):
logger = lldb.formatters.Logger.Logger()
return 24 if self.sys_params.is_64_bit else 16
def offset_base(self):
logger = lldb.formatters.Logger.Logger()
return self.offset_text() + self.sys_params.pointer_size
def url_text(self):
logger = lldb.formatters.Logger.Logger()
text = self.valobj.CreateChildAtOffset(
"text", self.offset_text(), self.sys_params.types_cache.NSString)
base = self.valobj.CreateChildAtOffset(
"base", self.offset_base(), self.sys_params.types_cache.NSURL)
my_string = CFString.CFString_SummaryProvider(text, None)
if len(my_string) > 0 and base.GetValueAsUnsigned(0) != 0:
# remove final " from myself
my_string = my_string[0:len(my_string) - 1]
my_string = my_string + ' -- '
my_base_string = NSURL_SummaryProvider(base, None)
if len(my_base_string) > 2:
# remove @" marker from base URL string
my_base_string = my_base_string[2:]
my_string = my_string + my_base_string
return my_string
class NSURLUnknown_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)
url_text_vo = self.valobj.CreateValueFromExpression(
"url", "(NSString*)[" + stream.GetData() + " description]")
if url_text_vo.IsValid():
return CFString.CFString_SummaryProvider(url_text_vo, None)
return '<variable is not NSURL>'
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 == 'NSURL':
wrapper = NSURLKnown_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('code_notrun', valobj)
else:
wrapper = NSURLUnknown_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit(
'unknown_class',
valobj.GetName() +
" seen as " +
name_string)
return wrapper
def NSURL_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 NSURL>'
return summary
return 'Summary Unavailable'
def __lldb_init_module(debugger, dict):
debugger.HandleCommand(
"type summary add -F NSURL.NSURL_SummaryProvider NSURL CFURLRef")
|
