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"""
LLDB AppKit formatters
part of The LLVM Compiler Infrastructure
This file is distributed under the University of Illinois Open Source
License. See LICENSE.TXT for details.
"""
# example summary provider for NSMachPort
# 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 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 the port number of an NSMachPort, so they need not
# obey the interface specification for synthetic children providers
class NSMachPortKnown_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.NSUInteger):
if self.sys_params.is_64_bit:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt)
self.update();
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture();
# one pointer is the ISA
# then we have one other internal pointer, plus
# 4 bytes worth of flags. hence, these values
def offset(self):
logger = lldb.formatters.Logger.Logger()
if self.sys_params.is_64_bit:
return 20
else:
return 12
def port(self):
logger = lldb.formatters.Logger.Logger()
vport = self.valobj.CreateChildAtOffset("port",
self.offset(),
self.sys_params.types_cache.NSUInteger)
return vport.GetValueAsUnsigned(0)
class NSMachPortUnknown_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 port(self):
logger = lldb.formatters.Logger.Logger()
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
num_children_vo = self.valobj.CreateValueFromExpression("port","(int)[" + stream.GetData() + " machPort]")
if num_children_vo.IsValid():
return num_children_vo.GetValueAsUnsigned(0)
return '<variable is not NSMachPort>'
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 == 'NSMachPort':
wrapper = NSMachPortKnown_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('code_notrun',valobj)
else:
wrapper = NSMachPortUnknown_SummaryProvider(valobj, class_data.sys_params)
statistics.metric_hit('unknown_class',valobj.GetName() + " seen as " + name_string)
return wrapper;
def NSMachPort_SummaryProvider (valobj,dict):
logger = lldb.formatters.Logger.Logger()
provider = GetSummary_Impl(valobj);
if provider != None:
if isinstance(provider,lldb.runtime.objc.objc_runtime.SpecialSituation_Description):
return provider.message()
try:
summary = provider.port();
except:
summary = None
logger >> "got summary " + str(summary)
if summary == None:
summary = '<variable is not NSMachPort>'
if isinstance(summary, basestring):
return summay
return 'mach port: ' + str(summary)
return 'Summary Unavailable'
def __lldb_init_module(debugger,dict):
debugger.HandleCommand("type summary add -F NSMachPort.NSMachPort_SummaryProvider NSMachPort")
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