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Enrico Granata
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# summary provider for NSURL
import lldb
import ctypes
import objc_runtime
import metrics
import CFString
statistics = 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):
self.lp64 = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update();
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
if self.lp64:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
self.pointer_size = 8
else:
self.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
self.pointer_size = 4
self.NSString = self.valobj.GetTarget().FindFirstType('NSString')
self.NSURL = self.valobj.GetTarget().FindFirstType('NSURL')
# 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)
# plus another pointer, and then the real data
def offset(self):
if self.lp64:
return 24
else:
return 16
def url_text(self):
text = self.valobj.CreateChildAtOffset("text",
self.offset(),
self.NSString.GetPointerType())
base = self.valobj.CreateChildAtOffset("base",
self.offset()+self.pointer_size,
self.NSURL.GetPointerType())
my_string = CFString.CFString_SummaryProvider(text,None)
if base.GetValueAsUnsigned(0) != 0:
my_string = my_string + " (base path: " + NSURL_SummaryProvider(base,None) + ")"
return my_string
class NSURLUnknown_SummaryProvider:
def adjust_for_architecture(self):
self.lp64 = (self.valobj.GetTarget().GetProcess().GetAddressByteSize() == 8)
self.is_little = (self.valobj.GetTarget().GetProcess().GetByteOrder() == lldb.eByteOrderLittle)
self.pointer_size = self.valobj.GetTarget().GetProcess().GetAddressByteSize()
def __init__(self, valobj):
self.valobj = valobj;
self.update()
def update(self):
self.adjust_for_architecture();
self.id_type = self.valobj.GetType().GetBasicType(lldb.eBasicTypeObjCID)
def url_text(self):
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
url_text_vo = self.valobj.CreateValueFromExpression("url","(NSString*)[" + stream.GetData() + " description]");
return CFString.CFString_SummaryProvider(url_text_vo,None)
def GetSummary_Impl(valobj):
global statistics
class_data = objc_runtime.ObjCRuntime(valobj)
if class_data.is_valid() == False:
statistics.metric_hit('invalid_pointer',valobj)
wrapper = None
return
class_data = class_data.read_class_data()
if class_data.is_valid() == False:
statistics.metric_hit('invalid_isa',valobj)
wrapper = None
return
if class_data.is_kvo():
class_data = class_data.get_superclass()
if class_data.is_valid() == False:
statistics.metric_hit('invalid_isa',valobj)
wrapper = None
return
name_string = class_data.class_name()
if name_string == 'NSURL':
wrapper = NSURLKnown_SummaryProvider(valobj)
statistics.metric_hit('code_notrun',valobj)
else:
wrapper = NSURLUnknown_SummaryProvider(valobj)
statistics.metric_hit('unknown_class',str(valobj) + " seen as " + name_string)
return wrapper;
def NSURL_SummaryProvider (valobj,dict):
provider = GetSummary_Impl(valobj);
if provider != None:
try:
summary = provider.url_text();
except:
summary = None
if summary == None or summary == '':
summary = 'no valid NSURL here'
return summary
return ''
def __lldb_init_module(debugger,dict):
debugger.HandleCommand("type summary add -F NSURL.NSURL_SummaryProvider NSURL CFURLRef")