diff options
Diffstat (limited to 'lldb/examples/summaries/cocoa/objc_runtime.py')
| -rw-r--r-- | lldb/examples/summaries/cocoa/objc_runtime.py | 1560 |
1 files changed, 840 insertions, 720 deletions
diff --git a/lldb/examples/summaries/cocoa/objc_runtime.py b/lldb/examples/summaries/cocoa/objc_runtime.py index 8b5debccb82..14ef1b42bf1 100644 --- a/lldb/examples/summaries/cocoa/objc_runtime.py +++ b/lldb/examples/summaries/cocoa/objc_runtime.py @@ -11,556 +11,641 @@ import lldb.formatters.attrib_fromdict import functools import lldb.formatters.Logger + class Utilities: - @staticmethod - def read_ascii(process, pointer,max_len=128): - logger = lldb.formatters.Logger.Logger() - error = lldb.SBError() - content = None - try: - content = process.ReadCStringFromMemory(pointer,max_len,error) - except: - pass - if content is None or len(content) == 0 or error.fail: - return None - return content - - @staticmethod - def is_valid_pointer(pointer, pointer_size, allow_tagged=0, allow_NULL=0): - logger = lldb.formatters.Logger.Logger() - if pointer is None: - return 0 - if pointer == 0: - return allow_NULL - if allow_tagged and (pointer % 2) == 1: - return 1 - return ((pointer % pointer_size) == 0) - - # Objective-C runtime has a rule that pointers in a class_t will only have bits 0 thru 46 set - # so if any pointer has bits 47 thru 63 high we know that this is not a valid isa - @staticmethod - def is_allowed_pointer(pointer): - logger = lldb.formatters.Logger.Logger() - if pointer is None: - return 0 - return ((pointer & 0xFFFF800000000000) == 0) - - @staticmethod - def read_child_of(valobj,offset,type): - logger = lldb.formatters.Logger.Logger() - if offset == 0 and type.GetByteSize() == valobj.GetByteSize(): - return valobj.GetValueAsUnsigned() - child = valobj.CreateChildAtOffset("childUNK",offset,type) - if child is None or child.IsValid() == 0: - return None; - return child.GetValueAsUnsigned() - - @staticmethod - def is_valid_identifier(name): - logger = lldb.formatters.Logger.Logger() - if name is None: - return None - if len(name) == 0: - return None - # technically, the ObjC runtime does not enforce any rules about what name a class can have - # in practice, the commonly used byte values for a class name are the letters, digits and some - # symbols: $, %, -, _, . - # WARNING: this means that you cannot use this runtime implementation if you need to deal - # with class names that use anything but what is allowed here - ok_values = dict.fromkeys("$%_.-ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890") - return all(c in ok_values for c in name) - - @staticmethod - def check_is_osx_lion(target): - logger = lldb.formatters.Logger.Logger() - # assume the only thing that has a Foundation.framework is a Mac - # assume anything < Lion does not even exist - try: - mod = target.module['Foundation'] - except: - mod = None - if mod is None or mod.IsValid() == 0: - return None - ver = mod.GetVersion() - if ver is None or ver == []: - return None - return (ver[0] < 900) - - # a utility method that factors out code common to almost all the formatters - # takes in an SBValue and a metrics object - # returns a class_data and a wrapper (or None, if the runtime alone can't decide on a wrapper) - @staticmethod - def prepare_class_detection(valobj,statistics): - logger = lldb.formatters.Logger.Logger() - class_data = ObjCRuntime(valobj) - if class_data.is_valid() == 0: - statistics.metric_hit('invalid_pointer',valobj) - wrapper = InvalidPointer_Description(valobj.GetValueAsUnsigned(0) == 0) - return class_data,wrapper - class_data = class_data.read_class_data() - if class_data.is_valid() == 0: - statistics.metric_hit('invalid_isa',valobj) - wrapper = InvalidISA_Description() - return class_data,wrapper - if class_data.is_kvo(): - class_data = class_data.get_superclass() - if class_data.class_name() == '_NSZombie_OriginalClass': - wrapper = ThisIsZombie_Description() - return class_data,wrapper - return class_data,None + + @staticmethod + def read_ascii(process, pointer, max_len=128): + logger = lldb.formatters.Logger.Logger() + error = lldb.SBError() + content = None + try: + content = process.ReadCStringFromMemory(pointer, max_len, error) + except: + pass + if content is None or len(content) == 0 or error.fail: + return None + return content + + @staticmethod + def is_valid_pointer(pointer, pointer_size, allow_tagged=0, allow_NULL=0): + logger = lldb.formatters.Logger.Logger() + if pointer is None: + return 0 + if pointer == 0: + return allow_NULL + if allow_tagged and (pointer % 2) == 1: + return 1 + return ((pointer % pointer_size) == 0) + + # Objective-C runtime has a rule that pointers in a class_t will only have bits 0 thru 46 set + # so if any pointer has bits 47 thru 63 high we know that this is not a + # valid isa + @staticmethod + def is_allowed_pointer(pointer): + logger = lldb.formatters.Logger.Logger() + if pointer is None: + return 0 + return ((pointer & 0xFFFF800000000000) == 0) + + @staticmethod + def read_child_of(valobj, offset, type): + logger = lldb.formatters.Logger.Logger() + if offset == 0 and type.GetByteSize() == valobj.GetByteSize(): + return valobj.GetValueAsUnsigned() + child = valobj.CreateChildAtOffset("childUNK", offset, type) + if child is None or child.IsValid() == 0: + return None + return child.GetValueAsUnsigned() + + @staticmethod + def is_valid_identifier(name): + logger = lldb.formatters.Logger.Logger() + if name is None: + return None + if len(name) == 0: + return None + # technically, the ObjC runtime does not enforce any rules about what name a class can have + # in practice, the commonly used byte values for a class name are the letters, digits and some + # symbols: $, %, -, _, . + # WARNING: this means that you cannot use this runtime implementation if you need to deal + # with class names that use anything but what is allowed here + ok_values = dict.fromkeys( + "$%_.-ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890") + return all(c in ok_values for c in name) + + @staticmethod + def check_is_osx_lion(target): + logger = lldb.formatters.Logger.Logger() + # assume the only thing that has a Foundation.framework is a Mac + # assume anything < Lion does not even exist + try: + mod = target.module['Foundation'] + except: + mod = None + if mod is None or mod.IsValid() == 0: + return None + ver = mod.GetVersion() + if ver is None or ver == []: + return None + return (ver[0] < 900) + + # a utility method that factors out code common to almost all the formatters + # takes in an SBValue and a metrics object + # returns a class_data and a wrapper (or None, if the runtime alone can't + # decide on a wrapper) + @staticmethod + def prepare_class_detection(valobj, statistics): + logger = lldb.formatters.Logger.Logger() + class_data = ObjCRuntime(valobj) + if class_data.is_valid() == 0: + statistics.metric_hit('invalid_pointer', valobj) + wrapper = InvalidPointer_Description( + valobj.GetValueAsUnsigned(0) == 0) + return class_data, wrapper + class_data = class_data.read_class_data() + if class_data.is_valid() == 0: + statistics.metric_hit('invalid_isa', valobj) + wrapper = InvalidISA_Description() + return class_data, wrapper + if class_data.is_kvo(): + class_data = class_data.get_superclass() + if class_data.class_name() == '_NSZombie_OriginalClass': + wrapper = ThisIsZombie_Description() + return class_data, wrapper + return class_data, None class RoT_Data: - def __init__(self,rot_pointer,params): - logger = lldb.formatters.Logger.Logger() - if (Utilities.is_valid_pointer(rot_pointer.GetValueAsUnsigned(),params.pointer_size, allow_tagged=0)): - self.sys_params = params - self.valobj = rot_pointer - #self.flags = Utilities.read_child_of(self.valobj,0,self.sys_params.uint32_t) - #self.instanceStart = Utilities.read_child_of(self.valobj,4,self.sys_params.uint32_t) - self.instanceSize = None # lazy fetching - offset = 24 if self.sys_params.is_64_bit else 16 - #self.ivarLayoutPtr = Utilities.read_child_of(self.valobj,offset,self.sys_params.addr_ptr_type) - self.namePointer = Utilities.read_child_of(self.valobj,offset,self.sys_params.types_cache.addr_ptr_type) - self.valid = 1 # self.check_valid() - else: - logger >> "Marking as invalid - rot is invalid" - self.valid = 0 - if self.valid: - self.name = Utilities.read_ascii(self.valobj.GetTarget().GetProcess(),self.namePointer) - if not(Utilities.is_valid_identifier(self.name)): - logger >> "Marking as invalid - name is invalid" - self.valid = 0 - - # perform sanity checks on the contents of this class_ro_t - def check_valid(self): - self.valid = 1 - # misaligned pointers seem to be possible for this field - #if not(Utilities.is_valid_pointer(self.namePointer,self.sys_params.pointer_size,allow_tagged=0)): - # self.valid = 0 - # pass - - def __str__(self): - logger = lldb.formatters.Logger.Logger() - return \ - "instanceSize = " + hex(self.instance_size()) + "\n" + \ - "namePointer = " + hex(self.namePointer) + " --> " + self.name - - def is_valid(self): - return self.valid - - def instance_size(self,align=0): - logger = lldb.formatters.Logger.Logger() - if self.is_valid() == 0: - return None - if self.instanceSize is None: - self.instanceSize = Utilities.read_child_of(self.valobj,8,self.sys_params.types_cache.uint32_t) - if align: - unalign = self.instance_size(0) - if self.sys_params.is_64_bit: - return ((unalign + 7) & ~7) % 0x100000000 - else: - return ((unalign + 3) & ~3) % 0x100000000 - else: - return self.instanceSize + + def __init__(self, rot_pointer, params): + logger = lldb.formatters.Logger.Logger() + if (Utilities.is_valid_pointer(rot_pointer.GetValueAsUnsigned(), + params.pointer_size, allow_tagged=0)): + self.sys_params = params + self.valobj = rot_pointer + #self.flags = Utilities.read_child_of(self.valobj,0,self.sys_params.uint32_t) + #self.instanceStart = Utilities.read_child_of(self.valobj,4,self.sys_params.uint32_t) + self.instanceSize = None # lazy fetching + offset = 24 if self.sys_params.is_64_bit else 16 + #self.ivarLayoutPtr = Utilities.read_child_of(self.valobj,offset,self.sys_params.addr_ptr_type) + self.namePointer = Utilities.read_child_of( + self.valobj, offset, self.sys_params.types_cache.addr_ptr_type) + self.valid = 1 # self.check_valid() + else: + logger >> "Marking as invalid - rot is invalid" + self.valid = 0 + if self.valid: + self.name = Utilities.read_ascii( + self.valobj.GetTarget().GetProcess(), self.namePointer) + if not(Utilities.is_valid_identifier(self.name)): + logger >> "Marking as invalid - name is invalid" + self.valid = 0 + + # perform sanity checks on the contents of this class_ro_t + def check_valid(self): + self.valid = 1 + # misaligned pointers seem to be possible for this field + # if not(Utilities.is_valid_pointer(self.namePointer,self.sys_params.pointer_size,allow_tagged=0)): + # self.valid = 0 + # pass + + def __str__(self): + logger = lldb.formatters.Logger.Logger() + return \ + "instanceSize = " + hex(self.instance_size()) + "\n" + \ + "namePointer = " + hex(self.namePointer) + " --> " + self.name + + def is_valid(self): + return self.valid + + def instance_size(self, align=0): + logger = lldb.formatters.Logger.Logger() + if self.is_valid() == 0: + return None + if self.instanceSize is None: + self.instanceSize = Utilities.read_child_of( + self.valobj, 8, self.sys_params.types_cache.uint32_t) + if align: + unalign = self.instance_size(0) + if self.sys_params.is_64_bit: + return ((unalign + 7) & ~7) % 0x100000000 + else: + return ((unalign + 3) & ~3) % 0x100000000 + else: + return self.instanceSize + class RwT_Data: - def __init__(self,rwt_pointer,params): - logger = lldb.formatters.Logger.Logger() - if (Utilities.is_valid_pointer(rwt_pointer.GetValueAsUnsigned(),params.pointer_size, allow_tagged=0)): - self.sys_params = params - self.valobj = rwt_pointer - #self.flags = Utilities.read_child_of(self.valobj,0,self.sys_params.uint32_t) - #self.version = Utilities.read_child_of(self.valobj,4,self.sys_params.uint32_t) - self.roPointer = Utilities.read_child_of(self.valobj,8,self.sys_params.types_cache.addr_ptr_type) - self.check_valid() - else: - logger >> "Marking as invalid - rwt is invald" - self.valid = 0 - if self.valid: - self.rot = self.valobj.CreateValueFromData("rot",lldb.SBData.CreateDataFromUInt64Array(self.sys_params.endianness, self.sys_params.pointer_size, [self.roPointer]),self.sys_params.types_cache.addr_ptr_type) + + def __init__(self, rwt_pointer, params): + logger = lldb.formatters.Logger.Logger() + if (Utilities.is_valid_pointer(rwt_pointer.GetValueAsUnsigned(), + params.pointer_size, allow_tagged=0)): + self.sys_params = params + self.valobj = rwt_pointer + #self.flags = Utilities.read_child_of(self.valobj,0,self.sys_params.uint32_t) + #self.version = Utilities.read_child_of(self.valobj,4,self.sys_params.uint32_t) + self.roPointer = Utilities.read_child_of( + self.valobj, 8, self.sys_params.types_cache.addr_ptr_type) + self.check_valid() + else: + logger >> "Marking as invalid - rwt is invald" + self.valid = 0 + if self.valid: + self.rot = self.valobj.CreateValueFromData( + "rot", lldb.SBData.CreateDataFromUInt64Array( + self.sys_params.endianness, self.sys_params.pointer_size, [ + self.roPointer]), self.sys_params.types_cache.addr_ptr_type) # self.rot = self.valobj.CreateValueFromAddress("rot",self.roPointer,self.sys_params.types_cache.addr_ptr_type).AddressOf() - self.data = RoT_Data(self.rot,self.sys_params) - - # perform sanity checks on the contents of this class_rw_t - def check_valid(self): - logger = lldb.formatters.Logger.Logger() - self.valid = 1 - if not(Utilities.is_valid_pointer(self.roPointer,self.sys_params.pointer_size,allow_tagged=0)): - logger >> "Marking as invalid - ropointer is invalid" - self.valid = 0 - - def __str__(self): - logger = lldb.formatters.Logger.Logger() - return \ - "roPointer = " + hex(self.roPointer) - - def is_valid(self): - logger = lldb.formatters.Logger.Logger() - if self.valid: - return self.data.is_valid() - return 0 + self.data = RoT_Data(self.rot, self.sys_params) + + # perform sanity checks on the contents of this class_rw_t + def check_valid(self): + logger = lldb.formatters.Logger.Logger() + self.valid = 1 + if not( + Utilities.is_valid_pointer( + self.roPointer, + self.sys_params.pointer_size, + allow_tagged=0)): + logger >> "Marking as invalid - ropointer is invalid" + self.valid = 0 + + def __str__(self): + logger = lldb.formatters.Logger.Logger() + return \ + "roPointer = " + hex(self.roPointer) + + def is_valid(self): + logger = lldb.formatters.Logger.Logger() + if self.valid: + return self.data.is_valid() + return 0 + class Class_Data_V2: - def __init__(self,isa_pointer,params): - logger = lldb.formatters.Logger.Logger() - if (isa_pointer != None) and (Utilities.is_valid_pointer(isa_pointer.GetValueAsUnsigned(),params.pointer_size, allow_tagged=0)): - self.sys_params = params - self.valobj = isa_pointer - self.check_valid() - else: - logger >> "Marking as invalid - isa is invalid or None" - self.valid = 0 - if self.valid: - self.rwt = self.valobj.CreateValueFromData("rwt",lldb.SBData.CreateDataFromUInt64Array(self.sys_params.endianness, self.sys_params.pointer_size, [self.dataPointer]),self.sys_params.types_cache.addr_ptr_type) + + def __init__(self, isa_pointer, params): + logger = lldb.formatters.Logger.Logger() + if (isa_pointer is not None) and (Utilities.is_valid_pointer( + isa_pointer.GetValueAsUnsigned(), params.pointer_size, allow_tagged=0)): + self.sys_params = params + self.valobj = isa_pointer + self.check_valid() + else: + logger >> "Marking as invalid - isa is invalid or None" + self.valid = 0 + if self.valid: + self.rwt = self.valobj.CreateValueFromData( + "rwt", lldb.SBData.CreateDataFromUInt64Array( + self.sys_params.endianness, self.sys_params.pointer_size, [ + self.dataPointer]), self.sys_params.types_cache.addr_ptr_type) # self.rwt = self.valobj.CreateValueFromAddress("rwt",self.dataPointer,self.sys_params.types_cache.addr_ptr_type).AddressOf() - self.data = RwT_Data(self.rwt,self.sys_params) - - # perform sanity checks on the contents of this class_t - # this call tries to minimize the amount of data fetched- as soon as we have "proven" - # that we have an invalid object, we stop reading - def check_valid(self): - logger = lldb.formatters.Logger.Logger() - self.valid = 1 - - self.isaPointer = Utilities.read_child_of(self.valobj,0,self.sys_params.types_cache.addr_ptr_type) - if not(Utilities.is_valid_pointer(self.isaPointer,self.sys_params.pointer_size,allow_tagged=0)): - logger >> "Marking as invalid - isaPointer is invalid" - self.valid = 0 - return - if not(Utilities.is_allowed_pointer(self.isaPointer)): - logger >> "Marking as invalid - isaPointer is not allowed" - self.valid = 0 - return - - self.cachePointer = Utilities.read_child_of(self.valobj,2*self.sys_params.pointer_size,self.sys_params.types_cache.addr_ptr_type) - if not(Utilities.is_valid_pointer(self.cachePointer,self.sys_params.pointer_size,allow_tagged=0)): - logger >> "Marking as invalid - cachePointer is invalid" - self.valid = 0 - return - if not(Utilities.is_allowed_pointer(self.cachePointer)): - logger >> "Marking as invalid - cachePointer is not allowed" - self.valid = 0 - return - self.dataPointer = Utilities.read_child_of(self.valobj,4*self.sys_params.pointer_size,self.sys_params.types_cache.addr_ptr_type) - if not(Utilities.is_valid_pointer(self.dataPointer,self.sys_params.pointer_size,allow_tagged=0)): - logger >> "Marking as invalid - dataPointer is invalid" - self.valid = 0 - return - if not(Utilities.is_allowed_pointer(self.dataPointer)): - logger >> "Marking as invalid - dataPointer is not allowed" - self.valid = 0 - return - - self.superclassIsaPointer = Utilities.read_child_of(self.valobj,1*self.sys_params.pointer_size,self.sys_params.types_cache.addr_ptr_type) - if not(Utilities.is_valid_pointer(self.superclassIsaPointer,self.sys_params.pointer_size,allow_tagged=0, allow_NULL=1)): - logger >> "Marking as invalid - superclassIsa is invalid" - self.valid = 0 - return - if not(Utilities.is_allowed_pointer(self.superclassIsaPointer)): - logger >> "Marking as invalid - superclassIsa is not allowed" - self.valid = 0 - return - - # in general, KVO is implemented by transparently subclassing - # however, there could be exceptions where a class does something else - # internally to implement the feature - this method will have no clue that a class - # has been KVO'ed unless the standard implementation technique is used - def is_kvo(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - if self.class_name().startswith("NSKVONotifying_"): - return 1 - return 0 - - # some CF classes have a valid ObjC isa in their CFRuntimeBase - # but instead of being class-specific this isa points to a match-'em-all class - # which is __NSCFType (the versions without __ also exists and we are matching to it - # just to be on the safe side) - def is_cftype(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - return self.class_name() == '__NSCFType' or self.class_name() == 'NSCFType' - - def get_superclass(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - parent_isa_pointer = self.valobj.CreateChildAtOffset("parent_isa", - self.sys_params.pointer_size, - self.sys_params.addr_ptr_type) - return Class_Data_V2(parent_isa_pointer,self.sys_params) - else: - return None - - def class_name(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - return self.data.data.name - else: - return None - - def is_valid(self): - logger = lldb.formatters.Logger.Logger() - if self.valid: - return self.data.is_valid() - return 0 - - def __str__(self): - logger = lldb.formatters.Logger.Logger() - return 'isaPointer = ' + hex(self.isaPointer) + "\n" + \ - "superclassIsaPointer = " + hex(self.superclassIsaPointer) + "\n" + \ - "cachePointer = " + hex(self.cachePointer) + "\n" + \ - "data = " + hex(self.dataPointer) - - def is_tagged(self): - return 0 - - def instance_size(self,align=0): - logger = lldb.formatters.Logger.Logger() - if self.is_valid() == 0: - return None - return self.rwt.rot.instance_size(align) - -# runtime v1 is much less intricate than v2 and stores relevant information directly in the class_t object + self.data = RwT_Data(self.rwt, self.sys_params) + + # perform sanity checks on the contents of this class_t + # this call tries to minimize the amount of data fetched- as soon as we have "proven" + # that we have an invalid object, we stop reading + def check_valid(self): + logger = lldb.formatters.Logger.Logger() + self.valid = 1 + + self.isaPointer = Utilities.read_child_of( + self.valobj, 0, self.sys_params.types_cache.addr_ptr_type) + if not( + Utilities.is_valid_pointer( + self.isaPointer, + self.sys_params.pointer_size, + allow_tagged=0)): + logger >> "Marking as invalid - isaPointer is invalid" + self.valid = 0 + return + if not(Utilities.is_allowed_pointer(self.isaPointer)): + logger >> "Marking as invalid - isaPointer is not allowed" + self.valid = 0 + return + + self.cachePointer = Utilities.read_child_of( + self.valobj, + 2 * self.sys_params.pointer_size, + self.sys_params.types_cache.addr_ptr_type) + if not( + Utilities.is_valid_pointer( + self.cachePointer, + self.sys_params.pointer_size, + allow_tagged=0)): + logger >> "Marking as invalid - cachePointer is invalid" + self.valid = 0 + return + if not(Utilities.is_allowed_pointer(self.cachePointer)): + logger >> "Marking as invalid - cachePointer is not allowed" + self.valid = 0 + return + self.dataPointer = Utilities.read_child_of( + self.valobj, + 4 * self.sys_params.pointer_size, + self.sys_params.types_cache.addr_ptr_type) + if not( + Utilities.is_valid_pointer( + self.dataPointer, + self.sys_params.pointer_size, + allow_tagged=0)): + logger >> "Marking as invalid - dataPointer is invalid" + self.valid = 0 + return + if not(Utilities.is_allowed_pointer(self.dataPointer)): + logger >> "Marking as invalid - dataPointer is not allowed" + self.valid = 0 + return + + self.superclassIsaPointer = Utilities.read_child_of( + self.valobj, + 1 * self.sys_params.pointer_size, + self.sys_params.types_cache.addr_ptr_type) + if not( + Utilities.is_valid_pointer( + self.superclassIsaPointer, + self.sys_params.pointer_size, + allow_tagged=0, + allow_NULL=1)): + logger >> "Marking as invalid - superclassIsa is invalid" + self.valid = 0 + return + if not(Utilities.is_allowed_pointer(self.superclassIsaPointer)): + logger >> "Marking as invalid - superclassIsa is not allowed" + self.valid = 0 + return + + # in general, KVO is implemented by transparently subclassing + # however, there could be exceptions where a class does something else + # internally to implement the feature - this method will have no clue that a class + # has been KVO'ed unless the standard implementation technique is used + def is_kvo(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + if self.class_name().startswith("NSKVONotifying_"): + return 1 + return 0 + + # some CF classes have a valid ObjC isa in their CFRuntimeBase + # but instead of being class-specific this isa points to a match-'em-all class + # which is __NSCFType (the versions without __ also exists and we are matching to it + # just to be on the safe side) + def is_cftype(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + return self.class_name() == '__NSCFType' or self.class_name() == 'NSCFType' + + def get_superclass(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + parent_isa_pointer = self.valobj.CreateChildAtOffset( + "parent_isa", self.sys_params.pointer_size, self.sys_params.addr_ptr_type) + return Class_Data_V2(parent_isa_pointer, self.sys_params) + else: + return None + + def class_name(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + return self.data.data.name + else: + return None + + def is_valid(self): + logger = lldb.formatters.Logger.Logger() + if self.valid: + return self.data.is_valid() + return 0 + + def __str__(self): + logger = lldb.formatters.Logger.Logger() + return 'isaPointer = ' + hex(self.isaPointer) + "\n" + \ + "superclassIsaPointer = " + hex(self.superclassIsaPointer) + "\n" + \ + "cachePointer = " + hex(self.cachePointer) + "\n" + \ + "data = " + hex(self.dataPointer) + + def is_tagged(self): + return 0 + + def instance_size(self, align=0): + logger = lldb.formatters.Logger.Logger() + if self.is_valid() == 0: + return None + return self.rwt.rot.instance_size(align) + +# runtime v1 is much less intricate than v2 and stores relevant +# information directly in the class_t object + + class Class_Data_V1: - def __init__(self,isa_pointer,params): - logger = lldb.formatters.Logger.Logger() - if (isa_pointer != None) and (Utilities.is_valid_pointer(isa_pointer.GetValueAsUnsigned(),params.pointer_size, allow_tagged=0)): - self.valid = 1 - self.sys_params = params - self.valobj = isa_pointer - self.check_valid() - else: - logger >> "Marking as invalid - isaPointer is invalid or None" - self.valid = 0 - if self.valid: - self.name = Utilities.read_ascii(self.valobj.GetTarget().GetProcess(),self.namePointer) - if not(Utilities.is_valid_identifier(self.name)): - logger >> "Marking as invalid - name is not valid" - self.valid = 0 - - # perform sanity checks on the contents of this class_t - def check_valid(self): - logger = lldb.formatters.Logger.Logger() - self.valid = 1 - - self.isaPointer = Utilities.read_child_of(self.valobj,0,self.sys_params.types_cache.addr_ptr_type) - if not(Utilities.is_valid_pointer(self.isaPointer,self.sys_params.pointer_size,allow_tagged=0)): - logger >> "Marking as invalid - isaPointer is invalid" - self.valid = 0 - return - - self.superclassIsaPointer = Utilities.read_child_of(self.valobj,1*self.sys_params.pointer_size,self.sys_params.types_cache.addr_ptr_type) - if not(Utilities.is_valid_pointer(self.superclassIsaPointer,self.sys_params.pointer_size,allow_tagged=0,allow_NULL=1)): - logger >> "Marking as invalid - superclassIsa is invalid" - self.valid = 0 - return - - self.namePointer = Utilities.read_child_of(self.valobj,2*self.sys_params.pointer_size,self.sys_params.types_cache.addr_ptr_type) - #if not(Utilities.is_valid_pointer(self.namePointer,self.sys_params.pointer_size,allow_tagged=0,allow_NULL=0)): - # self.valid = 0 - # return - - # in general, KVO is implemented by transparently subclassing - # however, there could be exceptions where a class does something else - # internally to implement the feature - this method will have no clue that a class - # has been KVO'ed unless the standard implementation technique is used - def is_kvo(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - if self.class_name().startswith("NSKVONotifying_"): - return 1 - return 0 - - # some CF classes have a valid ObjC isa in their CFRuntimeBase - # but instead of being class-specific this isa points to a match-'em-all class - # which is __NSCFType (the versions without __ also exists and we are matching to it - # just to be on the safe side) - def is_cftype(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - return self.class_name() == '__NSCFType' or self.class_name() == 'NSCFType' - - def get_superclass(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - parent_isa_pointer = self.valobj.CreateChildAtOffset("parent_isa", - self.sys_params.pointer_size, - self.sys_params.addr_ptr_type) - return Class_Data_V1(parent_isa_pointer,self.sys_params) - else: - return None - - def class_name(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - return self.name - else: - return None - - def is_valid(self): - return self.valid - - def __str__(self): - logger = lldb.formatters.Logger.Logger() - return 'isaPointer = ' + hex(self.isaPointer) + "\n" + \ - "superclassIsaPointer = " + hex(self.superclassIsaPointer) + "\n" + \ - "namePointer = " + hex(self.namePointer) + " --> " + self.name + \ - "instanceSize = " + hex(self.instanceSize()) + "\n" - - def is_tagged(self): - return 0 - - def instance_size(self,align=0): - logger = lldb.formatters.Logger.Logger() - if self.is_valid() == 0: - return None - if self.instanceSize is None: - self.instanceSize = Utilities.read_child_of(self.valobj,5*self.sys_params.pointer_size,self.sys_params.types_cache.addr_ptr_type) - if align: - unalign = self.instance_size(0) - if self.sys_params.is_64_bit: - return ((unalign + 7) & ~7) % 0x100000000 - else: - return ((unalign + 3) & ~3) % 0x100000000 - else: - return self.instanceSize + + def __init__(self, isa_pointer, params): + logger = lldb.formatters.Logger.Logger() + if (isa_pointer is not None) and (Utilities.is_valid_pointer( + isa_pointer.GetValueAsUnsigned(), params.pointer_size, allow_tagged=0)): + self.valid = 1 + self.sys_params = params + self.valobj = isa_pointer + self.check_valid() + else: + logger >> "Marking as invalid - isaPointer is invalid or None" + self.valid = 0 + if self.valid: + self.name = Utilities.read_ascii( + self.valobj.GetTarget().GetProcess(), self.namePointer) + if not(Utilities.is_valid_identifier(self.name)): + logger >> "Marking as invalid - name is not valid" + self.valid = 0 + + # perform sanity checks on the contents of this class_t + def check_valid(self): + logger = lldb.formatters.Logger.Logger() + self.valid = 1 + + self.isaPointer = Utilities.read_child_of( + self.valobj, 0, self.sys_params.types_cache.addr_ptr_type) + if not( + Utilities.is_valid_pointer( + self.isaPointer, + self.sys_params.pointer_size, + allow_tagged=0)): + logger >> "Marking as invalid - isaPointer is invalid" + self.valid = 0 + return + + self.superclassIsaPointer = Utilities.read_child_of( + self.valobj, + 1 * self.sys_params.pointer_size, + self.sys_params.types_cache.addr_ptr_type) + if not( + Utilities.is_valid_pointer( + self.superclassIsaPointer, + self.sys_params.pointer_size, + allow_tagged=0, + allow_NULL=1)): + logger >> "Marking as invalid - superclassIsa is invalid" + self.valid = 0 + return + + self.namePointer = Utilities.read_child_of( + self.valobj, + 2 * self.sys_params.pointer_size, + self.sys_params.types_cache.addr_ptr_type) + # if not(Utilities.is_valid_pointer(self.namePointer,self.sys_params.pointer_size,allow_tagged=0,allow_NULL=0)): + # self.valid = 0 + # return + + # in general, KVO is implemented by transparently subclassing + # however, there could be exceptions where a class does something else + # internally to implement the feature - this method will have no clue that a class + # has been KVO'ed unless the standard implementation technique is used + def is_kvo(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + if self.class_name().startswith("NSKVONotifying_"): + return 1 + return 0 + + # some CF classes have a valid ObjC isa in their CFRuntimeBase + # but instead of being class-specific this isa points to a match-'em-all class + # which is __NSCFType (the versions without __ also exists and we are matching to it + # just to be on the safe side) + def is_cftype(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + return self.class_name() == '__NSCFType' or self.class_name() == 'NSCFType' + + def get_superclass(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + parent_isa_pointer = self.valobj.CreateChildAtOffset( + "parent_isa", self.sys_params.pointer_size, self.sys_params.addr_ptr_type) + return Class_Data_V1(parent_isa_pointer, self.sys_params) + else: + return None + + def class_name(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + return self.name + else: + return None + + def is_valid(self): + return self.valid + + def __str__(self): + logger = lldb.formatters.Logger.Logger() + return 'isaPointer = ' + hex(self.isaPointer) + "\n" + \ + "superclassIsaPointer = " + hex(self.superclassIsaPointer) + "\n" + \ + "namePointer = " + hex(self.namePointer) + " --> " + self.name + \ + "instanceSize = " + hex(self.instanceSize()) + "\n" + + def is_tagged(self): + return 0 + + def instance_size(self, align=0): + logger = lldb.formatters.Logger.Logger() + if self.is_valid() == 0: + return None + if self.instanceSize is None: + self.instanceSize = Utilities.read_child_of( + self.valobj, + 5 * self.sys_params.pointer_size, + self.sys_params.types_cache.addr_ptr_type) + if align: + unalign = self.instance_size(0) + if self.sys_params.is_64_bit: + return ((unalign + 7) & ~7) % 0x100000000 + else: + return ((unalign + 3) & ~3) % 0x100000000 + else: + return self.instanceSize # these are the only tagged pointers values for current versions # of OSX - they might change in future OS releases, and no-one is # advised to rely on these values, or any of the bitmasking formulas # in TaggedClass_Data. doing otherwise is at your own risk -TaggedClass_Values_Lion = {1 : 'NSNumber', \ - 5: 'NSManagedObject', \ - 6: 'NSDate', \ - 7: 'NSDateTS' }; -TaggedClass_Values_NMOS = {0: 'NSAtom', \ - 3 : 'NSNumber', \ - 4: 'NSDateTS', \ - 5: 'NSManagedObject', \ - 6: 'NSDate' }; +TaggedClass_Values_Lion = {1: 'NSNumber', + 5: 'NSManagedObject', + 6: 'NSDate', + 7: 'NSDateTS'} +TaggedClass_Values_NMOS = {0: 'NSAtom', + 3: 'NSNumber', + 4: 'NSDateTS', + 5: 'NSManagedObject', + 6: 'NSDate'} + class TaggedClass_Data: - def __init__(self,pointer,params): - logger = lldb.formatters.Logger.Logger() - global TaggedClass_Values_Lion,TaggedClass_Values_NMOS - self.valid = 1 - self.name = None - self.sys_params = params - self.valobj = pointer - self.val = (pointer & ~0x0000000000000000FF) >> 8 - self.class_bits = (pointer & 0xE) >> 1 - self.i_bits = (pointer & 0xF0) >> 4 - - if self.sys_params.is_lion: - if self.class_bits in TaggedClass_Values_Lion: - self.name = TaggedClass_Values_Lion[self.class_bits] - else: - logger >> "Marking as invalid - not a good tagged pointer for Lion" - self.valid = 0 - else: - if self.class_bits in TaggedClass_Values_NMOS: - self.name = TaggedClass_Values_NMOS[self.class_bits] - else: - logger >> "Marking as invalid - not a good tagged pointer for NMOS" - self.valid = 0 - - - def is_valid(self): - return self.valid - - def class_name(self): - logger = lldb.formatters.Logger.Logger() - if self.is_valid(): - return self.name - else: - return 0 - - def value(self): - return self.val if self.is_valid() else None - - def info_bits(self): - return self.i_bits if self.is_valid() else None - - def is_kvo(self): - return 0 - - def is_cftype(self): - return 0 - - # we would need to go around looking for the superclass or ask the runtime - # for now, we seem not to require support for this operation so we will merrily - # pretend to be at a root point in the hierarchy - def get_superclass(self): - return None - - # anything that is handled here is tagged - def is_tagged(self): - return 1 - - # it seems reasonable to say that a tagged pointer is the size of a pointer - def instance_size(self,align=0): - logger = lldb.formatters.Logger.Logger() - if self.is_valid() == 0: - return None - return self.sys_params.pointer_size + + def __init__(self, pointer, params): + logger = lldb.formatters.Logger.Logger() + global TaggedClass_Values_Lion, TaggedClass_Values_NMOS + self.valid = 1 + self.name = None + self.sys_params = params + self.valobj = pointer + self.val = (pointer & ~0x0000000000000000FF) >> 8 + self.class_bits = (pointer & 0xE) >> 1 + self.i_bits = (pointer & 0xF0) >> 4 + + if self.sys_params.is_lion: + if self.class_bits in TaggedClass_Values_Lion: + self.name = TaggedClass_Values_Lion[self.class_bits] + else: + logger >> "Marking as invalid - not a good tagged pointer for Lion" + self.valid = 0 + else: + if self.class_bits in TaggedClass_Values_NMOS: + self.name = TaggedClass_Values_NMOS[self.class_bits] + else: + logger >> "Marking as invalid - not a good tagged pointer for NMOS" + self.valid = 0 + + def is_valid(self): + return self.valid + + def class_name(self): + logger = lldb.formatters.Logger.Logger() + if self.is_valid(): + return self.name + else: + return 0 + + def value(self): + return self.val if self.is_valid() else None + + def info_bits(self): + return self.i_bits if self.is_valid() else None + + def is_kvo(self): + return 0 + + def is_cftype(self): + return 0 + + # we would need to go around looking for the superclass or ask the runtime + # for now, we seem not to require support for this operation so we will merrily + # pretend to be at a root point in the hierarchy + def get_superclass(self): + return None + + # anything that is handled here is tagged + def is_tagged(self): + return 1 + + # it seems reasonable to say that a tagged pointer is the size of a pointer + def instance_size(self, align=0): + logger = lldb.formatters.Logger.Logger() + if self.is_valid() == 0: + return None + return self.sys_params.pointer_size class InvalidClass_Data: - def __init__(self): - pass - def is_valid(self): - return 0 + + def __init__(self): + pass + + def is_valid(self): + return 0 class Version: - def __init__(self, major, minor, release, build_string): - self._major = major - self._minor = minor - self._release = release - self._build_string = build_string - - def get_major(self): - return self._major - def get_minor(self): - return self._minor - def get_release(self): - return self._release - def get_build_string(self): - return self._build_string - - major = property(get_major,None) - minor = property(get_minor,None) - release = property(get_release,None) - build_string = property(get_build_string,None) - - def __lt__(self,other): - if (self.major < other.major): - return 1 - if (self.minor < other.minor): - return 1 - if (self.release < other.release): - return 1 - # build strings are not compared since they are heavily platform-dependent and might not always - # be available - return 0 - - def __eq__(self,other): - return (self.major == other.major) and \ - (self.minor == other.minor) and \ - (self.release == other.release) and \ - (self.build_string == other.build_string) - - # Python 2.6 doesn't have functools.total_ordering, so we have to implement - # other comparators - def __gt__(self, other): - return other < self - - def __le__(self, other): - return not other < self - - def __ge__(self, other): - return not self < other + + def __init__(self, major, minor, release, build_string): + self._major = major + self._minor = minor + self._release = release + self._build_string = build_string + + def get_major(self): + return self._major + + def get_minor(self): + return self._minor + + def get_release(self): + return self._release + + def get_build_string(self): + return self._build_string + + major = property(get_major, None) + minor = property(get_minor, None) + release = property(get_release, None) + build_string = property(get_build_string, None) + + def __lt__(self, other): + if (self.major < other.major): + return 1 + if (self.minor < other.minor): + return 1 + if (self.release < other.release): + return 1 + # build strings are not compared since they are heavily platform-dependent and might not always + # be available + return 0 + + def __eq__(self, other): + return (self.major == other.major) and \ + (self.minor == other.minor) and \ + (self.release == other.release) and \ + (self.build_string == other.build_string) + + # Python 2.6 doesn't have functools.total_ordering, so we have to implement + # other comparators + def __gt__(self, other): + return other < self + + def __le__(self, other): + return not other < self + + def __ge__(self, other): + return not self < other runtime_version = lldb.formatters.cache.Cache() @@ -568,214 +653,249 @@ os_version = lldb.formatters.cache.Cache() types_caches = lldb.formatters.cache.Cache() isa_caches = lldb.formatters.cache.Cache() + class SystemParameters: - def __init__(self,valobj): - logger = lldb.formatters.Logger.Logger() - self.adjust_for_architecture(valobj) - self.adjust_for_process(valobj) - - def adjust_for_process(self, valobj): - logger = lldb.formatters.Logger.Logger() - global runtime_version - global os_version - global types_caches - global isa_caches - - process = valobj.GetTarget().GetProcess() - self.pid = process.GetUniqueID() # using the unique ID for added guarantees (see svn revision 172628 for further details) - - if runtime_version.look_for_key(self.pid): - self.runtime_version = runtime_version.get_value(self.pid) - else: - self.runtime_version = ObjCRuntime.runtime_version(process) - runtime_version.add_item(self.pid,self.runtime_version) - - if os_version.look_for_key(self.pid): - self.is_lion = os_version.get_value(self.pid) - else: - self.is_lion = Utilities.check_is_osx_lion(valobj.GetTarget()) - os_version.add_item(self.pid,self.is_lion) - - if types_caches.look_for_key(self.pid): - self.types_cache = types_caches.get_value(self.pid) - else: - self.types_cache = lldb.formatters.attrib_fromdict.AttributesDictionary(allow_reset=0) - self.types_cache.addr_type = valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedLong) - self.types_cache.addr_ptr_type = self.types_cache.addr_type.GetPointerType() - self.types_cache.uint32_t = valobj.GetType().GetBasicType(lldb.eBasicTypeUnsignedInt) - types_caches.add_item(self.pid,self.types_cache) - - if isa_caches.look_for_key(self.pid): - self.isa_cache = isa_caches.get_value(self.pid) - else: - self.isa_cache = lldb.formatters.cache.Cache() - isa_caches.add_item(self.pid,self.isa_cache) - - def adjust_for_architecture(self,valobj): - process = valobj.GetTarget().GetProcess() - self.pointer_size = process.GetAddressByteSize() - self.is_64_bit = (self.pointer_size == 8) - self.endianness = process.GetByteOrder() - self.is_little = (self.endianness == lldb.eByteOrderLittle) - self.cfruntime_size = 16 if self.is_64_bit else 8 - - # a simple helper function that makes it more explicit that one is calculating - # an offset that is made up of X pointers and Y bytes of additional data - # taking into account pointer size - if you know there is going to be some padding - # you can pass that in and it will be taken into account (since padding may be different between - # 32 and 64 bit versions, you can pass padding value for both, the right one will be used) - def calculate_offset(self, num_pointers = 0, bytes_count = 0, padding32 = 0, padding64 = 0): - value = bytes_count + num_pointers*self.pointer_size - return value + padding64 if self.is_64_bit else value + padding32 + + def __init__(self, valobj): + logger = lldb.formatters.Logger.Logger() + self.adjust_for_architecture(valobj) + self.adjust_for_process(valobj) + + def adjust_for_process(self, valobj): + logger = lldb.formatters.Logger.Logger() + global runtime_version + global os_version + global types_caches + global isa_caches + + process = valobj.GetTarget().GetProcess() + # using the unique ID for added guarantees (see svn revision 172628 for + # further details) + self.pid = process.GetUniqueID() + + if runtime_version.look_for_key(self.pid): + self.runtime_version = runtime_version.get_value(self.pid) + else: + self.runtime_version = ObjCRuntime.runtime_version(process) + runtime_version.add_item(self.pid, self.runtime_version) + + if os_version.look_for_key(self.pid): + self.is_lion = os_version.get_value(self.pid) + else: + self.is_lion = Utilities.check_is_osx_lion(valobj.GetTarget()) + os_version.add_item(self.pid, self.is_lion) + + if types_caches.look_for_key(self.pid): + self.types_cache = types_caches.get_value(self.pid) + else: + self.types_cache = lldb.formatters.attrib_fromdict.AttributesDictionary( + allow_reset=0) + self.types_cache.addr_type = valobj.GetType( + ).GetBasicType(lldb.eBasicTypeUnsignedLong) + self.types_cache.addr_ptr_type = self.types_cache.addr_type.GetPointerType() + self.types_cache.uint32_t = valobj.GetType( + ).GetBasicType(lldb.eBasicTypeUnsignedInt) + types_caches.add_item(self.pid, self.types_cache) + + if isa_caches.look_for_key(self.pid): + self.isa_cache = isa_caches.get_value(self.pid) + else: + self.isa_cache = lldb.formatters.cache.Cache() + isa_caches.add_item(self.pid, self.isa_cache) + + def adjust_for_architecture(self, valobj): + process = valobj.GetTarget().GetProcess() + self.pointer_size = process.GetAddressByteSize() + self.is_64_bit = (self.pointer_size == 8) + self.endianness = process.GetByteOrder() + self.is_little = (self.endianness == lldb.eByteOrderLittle) + self.cfruntime_size = 16 if self.is_64_bit else 8 + + # a simple helper function that makes it more explicit that one is calculating + # an offset that is made up of X pointers and Y bytes of additional data + # taking into account pointer size - if you know there is going to be some padding + # you can pass that in and it will be taken into account (since padding may be different between + # 32 and 64 bit versions, you can pass padding value for both, the right + # one will be used) + def calculate_offset( + self, + num_pointers=0, + bytes_count=0, + padding32=0, + padding64=0): + value = bytes_count + num_pointers * self.pointer_size + return value + padding64 if self.is_64_bit else value + padding32 + class ObjCRuntime: - # the ObjC runtime has no explicit "version" field that we can use - # instead, we discriminate v1 from v2 by looking for the presence - # of a well-known section only present in v1 - @staticmethod - def runtime_version(process): - logger = lldb.formatters.Logger.Logger() - if process.IsValid() == 0: - logger >> "No process - bailing out" - return None - target = process.GetTarget() - num_modules = target.GetNumModules() - module_objc = None - for idx in range(num_modules): - module = target.GetModuleAtIndex(idx) - if module.GetFileSpec().GetFilename() == 'libobjc.A.dylib': - module_objc = module - break - if module_objc is None or module_objc.IsValid() == 0: - logger >> "no libobjc - bailing out" - return None - num_sections = module.GetNumSections() - section_objc = None - for idx in range(num_sections): - section = module.GetSectionAtIndex(idx) - if section.GetName() == '__OBJC': - section_objc = section - break - if section_objc != None and section_objc.IsValid(): - logger >> "found __OBJC: v1" - return 1 - logger >> "no __OBJC: v2" - return 2 - - @staticmethod - def runtime_from_isa(isa): - logger = lldb.formatters.Logger.Logger() - runtime = ObjCRuntime(isa) - runtime.isa = isa - return runtime - - def __init__(self,valobj): - logger = lldb.formatters.Logger.Logger() - self.valobj = valobj - self.adjust_for_architecture() - self.sys_params = SystemParameters(self.valobj) - self.unsigned_value = self.valobj.GetValueAsUnsigned() - self.isa_value = None - - def adjust_for_architecture(self): - pass + # the ObjC runtime has no explicit "version" field that we can use + # instead, we discriminate v1 from v2 by looking for the presence + # of a well-known section only present in v1 + @staticmethod + def runtime_version(process): + logger = lldb.formatters.Logger.Logger() + if process.IsValid() == 0: + logger >> "No process - bailing out" + return None + target = process.GetTarget() + num_modules = target.GetNumModules() + module_objc = None + for idx in range(num_modules): + module = target.GetModuleAtIndex(idx) + if module.GetFileSpec().GetFilename() == 'libobjc.A.dylib': + module_objc = module + break + if module_objc is None or module_objc.IsValid() == 0: + logger >> "no libobjc - bailing out" + return None + num_sections = module.GetNumSections() + section_objc = None + for idx in range(num_sections): + section = module.GetSectionAtIndex(idx) + if section.GetName() == '__OBJC': + section_objc = section + break + if section_objc is not None and section_objc.IsValid(): + logger >> "found __OBJC: v1" + return 1 + logger >> "no __OBJC: v2" + return 2 + + @staticmethod + def runtime_from_isa(isa): + logger = lldb.formatters.Logger.Logger() + runtime = ObjCRuntime(isa) + runtime.isa = isa + return runtime + + def __init__(self, valobj): + logger = lldb.formatters.Logger.Logger() + self.valobj = valobj + self.adjust_for_architecture() + self.sys_params = SystemParameters(self.valobj) + self.unsigned_value = self.valobj.GetValueAsUnsigned() + self.isa_value = None + + def adjust_for_architecture(self): + pass # an ObjC pointer can either be tagged or must be aligned - def is_tagged(self): - logger = lldb.formatters.Logger.Logger() - if self.valobj is None: - return 0 - return (Utilities.is_valid_pointer(self.unsigned_value,self.sys_params.pointer_size, allow_tagged=1) and \ - not(Utilities.is_valid_pointer(self.unsigned_value,self.sys_params.pointer_size, allow_tagged=0))) - - def is_valid(self): - logger = lldb.formatters.Logger.Logger() - if self.valobj is None: - return 0 - if self.valobj.IsInScope() == 0: - return 0 - return Utilities.is_valid_pointer(self.unsigned_value,self.sys_params.pointer_size, allow_tagged=1) - - def is_nil(self): - return self.unsigned_value == 0 - - def read_isa(self): - logger = lldb.formatters.Logger.Logger() - if self.isa_value != None: - logger >> "using cached isa" - return self.isa_value - self.isa_pointer = self.valobj.CreateChildAtOffset("cfisa", - 0, - self.sys_params.types_cache.addr_ptr_type) - if self.isa_pointer is None or self.isa_pointer.IsValid() == 0: - logger >> "invalid isa - bailing out" - return None; - self.isa_value = self.isa_pointer.GetValueAsUnsigned(1) - if self.isa_value == 1: - logger >> "invalid isa value - bailing out" - return None; - return Ellipsis - - def read_class_data(self): - logger = lldb.formatters.Logger.Logger() - global isa_cache - if self.is_tagged(): - # tagged pointers only exist in ObjC v2 - if self.sys_params.runtime_version == 2: - logger >> "on v2 and tagged - maybe" - # not every odd-valued pointer is actually tagged. most are just plain wrong - # we could try and predetect this before even creating a TaggedClass_Data object - # but unless performance requires it, this seems a cleaner way to tackle the task - tentative_tagged = TaggedClass_Data(self.unsigned_value,self.sys_params) - if tentative_tagged.is_valid(): - logger >> "truly tagged" - return tentative_tagged - else: - logger >> "not tagged - error" - return InvalidClass_Data() - else: - logger >> "on v1 and tagged - error" - return InvalidClass_Data() - if self.is_valid() == 0 or self.read_isa() is None: - return InvalidClass_Data() - data = self.sys_params.isa_cache.get_value(self.isa_value,default=None) - if data != None: - return data - if self.sys_params.runtime_version == 2: - data = Class_Data_V2(self.isa_pointer,self.sys_params) - else: - data = Class_Data_V1(self.isa_pointer,self.sys_params) - if data is None: - return InvalidClass_Data() - if data.is_valid(): - self.sys_params.isa_cache.add_item(self.isa_value,data,ok_to_replace=1) - return data - -# these classes below can be used by the data formatters to provide a consistent message that describes a given runtime-generated situation + def is_tagged(self): + logger = lldb.formatters.Logger.Logger() + if self.valobj is None: + return 0 + return ( + Utilities.is_valid_pointer( + self.unsigned_value, + self.sys_params.pointer_size, + allow_tagged=1) and not( + Utilities.is_valid_pointer( + self.unsigned_value, + self.sys_params.pointer_size, + allow_tagged=0))) + + def is_valid(self): + logger = lldb.formatters.Logger.Logger() + if self.valobj is None: + return 0 + if self.valobj.IsInScope() == 0: + return 0 + return Utilities.is_valid_pointer( + self.unsigned_value, + self.sys_params.pointer_size, + allow_tagged=1) + + def is_nil(self): + return self.unsigned_value == 0 + + def read_isa(self): + logger = lldb.formatters.Logger.Logger() + if self.isa_value is not None: + logger >> "using cached isa" + return self.isa_value + self.isa_pointer = self.valobj.CreateChildAtOffset( + "cfisa", 0, self.sys_params.types_cache.addr_ptr_type) + if self.isa_pointer is None or self.isa_pointer.IsValid() == 0: + logger >> "invalid isa - bailing out" + return None + self.isa_value = self.isa_pointer.GetValueAsUnsigned(1) + if self.isa_value == 1: + logger >> "invalid isa value - bailing out" + return None + return Ellipsis + + def read_class_data(self): + logger = lldb.formatters.Logger.Logger() + global isa_cache + if self.is_tagged(): + # tagged pointers only exist in ObjC v2 + if self.sys_params.runtime_version == 2: + logger >> "on v2 and tagged - maybe" + # not every odd-valued pointer is actually tagged. most are just plain wrong + # we could try and predetect this before even creating a TaggedClass_Data object + # but unless performance requires it, this seems a cleaner way + # to tackle the task + tentative_tagged = TaggedClass_Data( + self.unsigned_value, self.sys_params) + if tentative_tagged.is_valid(): + logger >> "truly tagged" + return tentative_tagged + else: + logger >> "not tagged - error" + return InvalidClass_Data() + else: + logger >> "on v1 and tagged - error" + return InvalidClass_Data() + if self.is_valid() == 0 or self.read_isa() is None: + return InvalidClass_Data() + data = self.sys_params.isa_cache.get_value( + self.isa_value, default=None) + if data is not None: + return data + if self.sys_params.runtime_version == 2: + data = Class_Data_V2(self.isa_pointer, self.sys_params) + else: + data = Class_Data_V1(self.isa_pointer, self.sys_params) + if data is None: + return InvalidClass_Data() + if data.is_valid(): + self.sys_params.isa_cache.add_item( + self.isa_value, data, ok_to_replace=1) + return data + +# these classes below can be used by the data formatters to provide a +# consistent message that describes a given runtime-generated situation + + class SpecialSituation_Description: - def message(self): - return '' + + def message(self): + return '' + class InvalidPointer_Description(SpecialSituation_Description): - def __init__(self,nil): - self.is_nil = nil + def __init__(self, nil): + self.is_nil = nil + + def message(self): + if self.is_nil: + return '@"<nil>"' + else: + return '<invalid pointer>' - def message(self): - if self.is_nil: - return '@"<nil>"' - else: - return '<invalid pointer>' class InvalidISA_Description(SpecialSituation_Description): - def __init__(self): - pass + def __init__(self): + pass + + def message(self): + return '<not an Objective-C object>' - def message(self): - return '<not an Objective-C object>' class ThisIsZombie_Description(SpecialSituation_Description): - def message(self): - return '<freed object>'
\ No newline at end of file + + def message(self): + return '<freed object>' |
