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207 lines
6.8 KiB
Python
207 lines
6.8 KiB
Python
"""
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LLDB AppKit formatters
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part of The LLVM Compiler Infrastructure
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This file is distributed under the University of Illinois Open Source
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License. See LICENSE.TXT for details.
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"""
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# summary provider for CF(Mutable)BitVector
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import lldb
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import ctypes
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import lldb.runtime.objc.objc_runtime
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import lldb.formatters.metrics
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import lldb.formatters.Logger
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# first define some utility functions
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def byte_index(abs_pos):
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logger = lldb.formatters.Logger.Logger()
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return abs_pos / 8
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def bit_index(abs_pos):
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logger = lldb.formatters.Logger.Logger()
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return abs_pos & 7
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def get_bit(byte, index):
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logger = lldb.formatters.Logger.Logger()
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if index < 0 or index > 7:
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return None
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return (byte >> (7 - index)) & 1
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def grab_array_item_data(pointer, index):
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logger = lldb.formatters.Logger.Logger()
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return pointer.GetPointeeData(index, 1)
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statistics = lldb.formatters.metrics.Metrics()
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statistics.add_metric('invalid_isa')
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statistics.add_metric('invalid_pointer')
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statistics.add_metric('unknown_class')
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statistics.add_metric('code_notrun')
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# despite the similary to synthetic children providers, these classes are not
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# trying to provide anything but a summary for a CF*BitVector, so they need not
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# obey the interface specification for synthetic children providers
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class CFBitVectorKnown_SummaryProvider:
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def adjust_for_architecture(self):
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logger = lldb.formatters.Logger.Logger()
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self.uiint_size = self.sys_params.types_cache.NSUInteger.GetByteSize()
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pass
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def __init__(self, valobj, params):
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logger = lldb.formatters.Logger.Logger()
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self.valobj = valobj
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self.sys_params = params
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if not(self.sys_params.types_cache.NSUInteger):
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if self.sys_params.is_64_bit:
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self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
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).GetBasicType(lldb.eBasicTypeUnsignedLong)
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else:
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self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
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).GetBasicType(lldb.eBasicTypeUnsignedInt)
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if not(self.sys_params.types_cache.charptr):
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self.sys_params.types_cache.charptr = self.valobj.GetType(
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).GetBasicType(lldb.eBasicTypeChar).GetPointerType()
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self.update()
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def update(self):
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logger = lldb.formatters.Logger.Logger()
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self.adjust_for_architecture()
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# we skip the CFRuntimeBase
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# then the next CFIndex is the count
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# then we skip another CFIndex and then we get at a byte array
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# that wraps the individual bits
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def contents(self):
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logger = lldb.formatters.Logger.Logger()
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count_vo = self.valobj.CreateChildAtOffset(
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"count",
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self.sys_params.cfruntime_size,
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self.sys_params.types_cache.NSUInteger)
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count = count_vo.GetValueAsUnsigned(0)
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if count == 0:
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return '(empty)'
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array_vo = self.valobj.CreateChildAtOffset(
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"data",
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self.sys_params.cfruntime_size +
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2 *
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self.uiint_size,
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self.sys_params.types_cache.charptr)
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data_list = []
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cur_byte_pos = None
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for i in range(0, count):
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if cur_byte_pos is None:
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cur_byte_pos = byte_index(i)
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cur_byte = grab_array_item_data(array_vo, cur_byte_pos)
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cur_byte_val = cur_byte.uint8[0]
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else:
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byte_pos = byte_index(i)
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# do not fetch the pointee data every single time through
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if byte_pos != cur_byte_pos:
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cur_byte_pos = byte_pos
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cur_byte = grab_array_item_data(array_vo, cur_byte_pos)
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cur_byte_val = cur_byte.uint8[0]
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bit = get_bit(cur_byte_val, bit_index(i))
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if (i % 4) == 0:
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data_list.append(' ')
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if bit == 1:
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data_list.append('1')
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else:
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data_list.append('0')
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return ''.join(data_list)
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class CFBitVectorUnknown_SummaryProvider:
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def adjust_for_architecture(self):
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pass
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def __init__(self, valobj, params):
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logger = lldb.formatters.Logger.Logger()
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self.valobj = valobj
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self.sys_params = params
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self.update()
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def update(self):
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logger = lldb.formatters.Logger.Logger()
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self.adjust_for_architecture()
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def contents(self):
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logger = lldb.formatters.Logger.Logger()
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return '<unable to summarize this CFBitVector>'
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def GetSummary_Impl(valobj):
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logger = lldb.formatters.Logger.Logger()
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global statistics
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class_data, wrapper = lldb.runtime.objc.objc_runtime.Utilities.prepare_class_detection(
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valobj, statistics)
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if wrapper:
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return wrapper
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name_string = class_data.class_name()
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actual_name = name_string
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logger >> "name string got was " + \
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str(name_string) + " but actual name is " + str(actual_name)
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if class_data.is_cftype():
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# CFBitVectorRef does not expose an actual NSWrapper type, so we have to check that this is
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# an NSCFType and then check we are a pointer-to CFBitVectorRef
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valobj_type = valobj.GetType()
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if valobj_type.IsValid() and valobj_type.IsPointerType():
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valobj_type = valobj_type.GetPointeeType()
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if valobj_type.IsValid():
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actual_name = valobj_type.GetName()
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if actual_name == '__CFBitVector' or actual_name == '__CFMutableBitVector':
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wrapper = CFBitVectorKnown_SummaryProvider(
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valobj, class_data.sys_params)
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statistics.metric_hit('code_notrun', valobj)
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else:
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wrapper = CFBitVectorUnknown_SummaryProvider(
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valobj, class_data.sys_params)
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print actual_name
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else:
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wrapper = CFBitVectorUnknown_SummaryProvider(
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valobj, class_data.sys_params)
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print name_string
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statistics.metric_hit(
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'unknown_class',
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valobj.GetName() +
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" seen as " +
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name_string)
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return wrapper
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def CFBitVector_SummaryProvider(valobj, dict):
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logger = lldb.formatters.Logger.Logger()
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provider = GetSummary_Impl(valobj)
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if provider is not None:
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if isinstance(
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provider,
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lldb.runtime.objc.objc_runtime.SpecialSituation_Description):
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return provider.message()
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try:
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summary = provider.contents()
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except:
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summary = None
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logger >> "summary got from provider: " + str(summary)
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if summary is None or summary == '':
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summary = '<variable is not CFBitVector>'
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return summary
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return 'Summary Unavailable'
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def __lldb_init_module(debugger, dict):
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debugger.HandleCommand(
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"type summary add -F CFBitVector.CFBitVector_SummaryProvider CFBitVectorRef CFMutableBitVectorRef")
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