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qt-creator/share/qtcreator/debugger/dumper.py
Orgad Shaneh 25f5710df2 Dumper: Use correct integer value for enums 
In case of an enum bitfield

Change-Id: I1e7756d5dffb4d81030795c495f2474a77c50452
Reviewed-by: hjk <hjk@qt.io>
2017-06-20 16:26:57 +00:00

3953 lines
152 KiB
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############################################################################
#
# Copyright (C) 2016 The Qt Company Ltd.
# Contact: https://www.qt.io/licensing/
#
# This file is part of Qt Creator.
#
# Commercial License Usage
# Licensees holding valid commercial Qt licenses may use this file in
# accordance with the commercial license agreement provided with the
# Software or, alternatively, in accordance with the terms contained in
# a written agreement between you and The Qt Company. For licensing terms
# and conditions see https://www.qt.io/terms-conditions. For further
# information use the contact form at https://www.qt.io/contact-us.
#
# GNU General Public License Usage
# Alternatively, this file may be used under the terms of the GNU
# General Public License version 3 as published by the Free Software
# Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
# included in the packaging of this file. Please review the following
# information to ensure the GNU General Public License requirements will
# be met: https://www.gnu.org/licenses/gpl-3.0.html.
#
############################################################################
import os
import codecs
import copy
import collections
import struct
import sys
import base64
import re
import time
import json
import inspect
import threading
if sys.version_info[0] >= 3:
xrange = range
toInteger = int
else:
toInteger = long
# Debugger start modes. Keep in sync with DebuggerStartMode in debuggerconstants.h
NoStartMode, \
StartInternal, \
StartExternal, \
AttachExternal, \
AttachCrashedExternal, \
AttachCore, \
AttachToRemoteServer, \
AttachToRemoteProcess, \
StartRemoteProcess, \
= range(0, 9)
# Known special formats. Keep in sync with DisplayFormat in debuggerprotocol.h
AutomaticFormat, \
RawFormat, \
SimpleFormat, \
EnhancedFormat, \
SeparateFormat, \
Latin1StringFormat, \
SeparateLatin1StringFormat, \
Utf8StringFormat, \
SeparateUtf8StringFormat, \
Local8BitStringFormat, \
Utf16StringFormat, \
Ucs4StringFormat, \
Array10Format, \
Array100Format, \
Array1000Format, \
Array10000Format, \
ArrayPlotFormat, \
CompactMapFormat, \
DirectQListStorageFormat, \
IndirectQListStorageFormat, \
= range(0, 20)
# Breakpoints. Keep synchronized with BreakpointType in breakpoint.h
UnknownType, \
BreakpointByFileAndLine, \
BreakpointByFunction, \
BreakpointByAddress, \
BreakpointAtThrow, \
BreakpointAtCatch, \
BreakpointAtMain, \
BreakpointAtFork, \
BreakpointAtExec, \
BreakpointAtSysCall, \
WatchpointAtAddress, \
WatchpointAtExpression, \
BreakpointOnQmlSignalEmit, \
BreakpointAtJavaScriptThrow, \
= range(0, 14)
# Internal codes for types keep in sync with cdbextensions pytype.cpp
TypeCodeTypedef, \
TypeCodeStruct, \
TypeCodeVoid, \
TypeCodeIntegral, \
TypeCodeFloat, \
TypeCodeEnum, \
TypeCodePointer, \
TypeCodeArray, \
TypeCodeComplex, \
TypeCodeReference, \
TypeCodeFunction, \
TypeCodeMemberPointer, \
TypeCodeFortranString, \
TypeCodeUnresolvable, \
TypeCodeBitfield, \
= range(0, 15)
def isIntegralTypeName(name):
return name in ('int', 'unsigned int', 'signed int',
'short', 'unsigned short',
'long', 'unsigned long',
'long long', 'unsigned long long',
'char', 'signed char', 'unsigned char',
'bool')
def isFloatingPointTypeName(name):
return name in ('float', 'double', 'long double')
def arrayForms():
return [ArrayPlotFormat]
def mapForms():
return [CompactMapFormat]
class ReportItem:
"""
Helper structure to keep temporary 'best' information about a value
or a type scheduled to be reported. This might get overridden be
subsequent better guesses during a putItem() run.
"""
def __init__(self, value = None, encoding = None, priority = -100, elided = None):
self.value = value
self.priority = priority
self.encoding = encoding
self.elided = elided
def __str__(self):
return 'Item(value: %s, encoding: %s, priority: %s, elided: %s)' \
% (self.value, self.encoding, self.priority, self.elided)
def warn(message):
DumperBase.warn(message)
def xwarn(message):
warn(message)
import traceback
traceback.print_stack()
def error(message):
raise RuntimeError(message)
def showException(msg, exType, exValue, exTraceback):
DumperBase.showException(msg, exType, exValue, exTraceback)
class Children:
def __init__(self, d, numChild = 1, childType = None, childNumChild = None,
maxNumChild = None, addrBase = None, addrStep = None):
self.d = d
self.numChild = numChild
self.childNumChild = childNumChild
self.maxNumChild = maxNumChild
if childType is None:
self.childType = None
else:
self.childType = childType.name
if not self.d.isCli:
self.d.putField('childtype', self.childType)
if childNumChild is not None:
self.d.putField('childnumchild', childNumChild)
self.childNumChild = childNumChild
if addrBase is not None and addrStep is not None:
self.d.put('addrbase="0x%x",addrstep="%d",' % (addrBase, addrStep))
def __enter__(self):
self.savedChildType = self.d.currentChildType
self.savedChildNumChild = self.d.currentChildNumChild
self.savedNumChild = self.d.currentNumChild
self.savedMaxNumChild = self.d.currentMaxNumChild
self.d.currentChildType = self.childType
self.d.currentChildNumChild = self.childNumChild
self.d.currentNumChild = self.numChild
self.d.currentMaxNumChild = self.maxNumChild
self.d.put(self.d.childrenPrefix)
def __exit__(self, exType, exValue, exTraceBack):
if exType is not None:
if self.d.passExceptions:
showException('CHILDREN', exType, exValue, exTraceBack)
self.d.putSpecialValue('notaccessible')
self.d.putNumChild(0)
if self.d.currentMaxNumChild is not None:
if self.d.currentMaxNumChild < self.d.currentNumChild:
self.d.put('{name="<incomplete>",value="",type="",numchild="0"},')
self.d.currentChildType = self.savedChildType
self.d.currentChildNumChild = self.savedChildNumChild
self.d.currentNumChild = self.savedNumChild
self.d.currentMaxNumChild = self.savedMaxNumChild
if self.d.isCli:
self.output += '\n' + ' ' * self.indent
self.d.put(self.d.childrenSuffix)
return True
class SubItem:
def __init__(self, d, component):
self.d = d
self.name = component
self.iname = None
def __enter__(self):
self.d.enterSubItem(self)
def __exit__(self, exType, exValue, exTraceBack):
return self.d.exitSubItem(self, exType, exValue, exTraceBack)
class TopLevelItem(SubItem):
def __init__(self, d, iname):
self.d = d
self.iname = iname
self.name = None
class UnnamedSubItem(SubItem):
def __init__(self, d, component):
self.d = d
self.iname = '%s.%s' % (self.d.currentIName, component)
self.name = None
class DumperBase:
@staticmethod
def warn(message):
print('bridgemessage={msg="%s"},' % message.replace('"', '$').encode('latin1'))
@staticmethod
def showException(msg, exType, exValue, exTraceback):
warn('**** CAUGHT EXCEPTION: %s ****' % msg)
try:
import traceback
for line in traceback.format_exception(exType, exValue, exTraceback):
warn('%s' % line)
except:
pass
def __init__(self):
self.isCdb = False
self.isGdb = False
self.isLldb = False
self.isCli = False
# Later set, or not set:
self.stringCutOff = 10000
self.displayStringLimit = 100
self.typesReported = {}
self.typesToReport = {}
self.qtNamespaceToReport = None
self.qtCustomEventFunc = 0
self.qtCustomEventPltFunc = 0
self.qtPropertyFunc = 0
self.passExceptions = False
self.isTesting = False
self.typeData = {}
self.isBigEndian = False
self.packCode = '<'
self.resetCaches()
self.resetStats()
self.childrenPrefix = 'children=['
self.childrenSuffix = '],'
self.dumpermodules = [
'qttypes',
'stdtypes',
'misctypes',
'boosttypes',
'opencvtypes',
'creatortypes',
'personaltypes',
]
# These values are never used, but the variables need to have
# some value base for the swapping logic in Children.__enter__()
# and Children.__exit__().
self.currentIName = None
self.currentValue = None
self.currentType = None
self.currentNumChild = None
self.currentMaxNumChild = None
self.currentPrintsAddress = True
self.currentChildType = None
self.currentChildNumChild = None
self.registerKnownTypes()
def setVariableFetchingOptions(self, args):
self.resultVarName = args.get('resultvarname', '')
self.expandedINames = set(args.get('expanded', []))
self.stringCutOff = int(args.get('stringcutoff', 10000))
self.displayStringLimit = int(args.get('displaystringlimit', 100))
self.typeformats = args.get('typeformats', {})
self.formats = args.get('formats', {})
self.watchers = args.get('watchers', {})
self.useDynamicType = int(args.get('dyntype', '0'))
self.useFancy = int(args.get('fancy', '0'))
self.forceQtNamespace = int(args.get('forcens', '0'))
self.passExceptions = int(args.get('passexceptions', '0'))
self.isTesting = int(args.get('testing', '0'))
self.showQObjectNames = int(args.get('qobjectnames', '1'))
self.nativeMixed = int(args.get('nativemixed', '0'))
self.autoDerefPointers = int(args.get('autoderef', '0'))
self.partialVariable = args.get('partialvar', '')
self.uninitialized = args.get('uninitialized', [])
self.uninitialized = list(map(lambda x: self.hexdecode(x), self.uninitialized))
self.partialUpdate = int(args.get('partial', '0'))
self.fallbackQtVersion = 0x50200
#warn('NAMESPACE: "%s"' % self.qtNamespace())
#warn('EXPANDED INAMES: %s' % self.expandedINames)
#warn('WATCHERS: %s' % self.watchers)
def resetCaches(self):
# This is a cache mapping from 'type name' to 'display alternatives'.
self.qqFormats = { 'QVariant (QVariantMap)' : mapForms() }
# This is a cache of all known dumpers.
self.qqDumpers = {} # Direct type match
self.qqDumpersEx = {} # Using regexp
# This is a cache of all dumpers that support writing.
self.qqEditable = {}
# This keeps canonical forms of the typenames, without array indices etc.
self.cachedFormats = {}
# Maps type names to static metaobjects. If a type is known
# to not be QObject derived, it contains a 0 value.
self.knownStaticMetaObjects = {}
self.counts = {}
self.structPatternCache = {}
self.pretimings = {}
self.timings = []
def resetStats(self):
# Timing collection
self.pretimings = {}
self.timings = []
pass
def dumpStats(self):
msg = [self.counts, self.timings]
self.resetStats()
return msg
def bump(self, key):
if key in self.counts:
self.counts[key] += 1
else:
self.counts[key] = 1
def preping(self, key):
return
self.pretimings[key] = time.time()
def ping(self, key):
return
elapsed = int(1000 * (time.time() - self.pretimings[key]))
self.timings.append([key, elapsed])
def childRange(self):
if self.currentMaxNumChild is None:
return xrange(0, self.currentNumChild)
return xrange(min(self.currentMaxNumChild, self.currentNumChild))
def enterSubItem(self, item):
if not item.iname:
item.iname = '%s.%s' % (self.currentIName, item.name)
if not self.isCli:
self.put('{')
if isinstance(item.name, str):
self.putField('name', item.name)
else:
self.indent += 1
self.output += '\n' + ' ' * self.indent
if isinstance(item.name, str):
self.output += item.name + ' = '
item.savedIName = self.currentIName
item.savedValue = self.currentValue
item.savedType = self.currentType
self.currentIName = item.iname
self.currentValue = ReportItem();
self.currentType = ReportItem();
def exitSubItem(self, item, exType, exValue, exTraceBack):
#warn('CURRENT VALUE: %s: %s %s' %
# (self.currentIName, self.currentValue, self.currentType))
if not exType is None:
if self.passExceptions:
showException('SUBITEM', exType, exValue, exTraceBack)
self.putSpecialValue('notaccessible')
self.putNumChild(0)
if not self.isCli:
try:
if self.currentType.value:
typeName = self.currentType.value
if len(typeName) > 0 and typeName != self.currentChildType:
self.putField('type', typeName)
if self.currentValue.value is None:
self.put('value="",encoding="notaccessible",numchild="0",')
else:
if not self.currentValue.encoding is None:
self.put('valueencoded="%s",' % self.currentValue.encoding)
if self.currentValue.elided:
self.put('valueelided="%s",' % self.currentValue.elided)
self.put('value="%s",' % self.currentValue.value)
except:
pass
self.put('},')
else:
self.indent -= 1
try:
if self.currentType.value:
typeName = self.currentType.value
self.put('<%s> = {' % typeName)
if self.currentValue.value is None:
self.put('<not accessible>')
else:
value = self.currentValue.value
if self.currentValue.encoding == 'latin1':
value = self.hexdecode(value)
elif self.currentValue.encoding == 'utf8':
value = self.hexdecode(value)
elif self.currentValue.encoding == 'utf16':
b = bytes(bytearray.fromhex(value))
value = codecs.decode(b, 'utf-16')
self.put('"%s"' % value)
if self.currentValue.elided:
self.put('...')
if self.currentType.value:
self.put('}')
except:
pass
self.currentIName = item.savedIName
self.currentValue = item.savedValue
self.currentType = item.savedType
return True
def stripForFormat(self, typeName):
if not isinstance(typeName, str):
error('Expected string in stripForFormat(), got %s' % type(typeName))
if typeName in self.cachedFormats:
return self.cachedFormats[typeName]
stripped = ''
inArray = 0
for c in typeName:
if c == '<':
break
if c == ' ':
continue
if c == '[':
inArray += 1
elif c == ']':
inArray -= 1
if inArray and ord(c) >= 48 and ord(c) <= 57:
continue
stripped += c
self.cachedFormats[typeName] = stripped
return stripped
def templateArgument(self, typeobj, position):
return typeobj.templateArgument(position)
def intType(self):
result = self.lookupType('int')
self.intType = lambda: result
return result
def charType(self):
result = self.lookupType('char')
self.intType = lambda: result
return result
def ptrSize(self):
result = self.lookupType('void*').size()
self.ptrSize = lambda: result
return result
def lookupType(self, typeName):
nativeType = self.lookupNativeType(typeName)
return None if nativeType is None else self.fromNativeType(nativeType)
def registerKnownTypes(self):
typeId = 'unsigned short'
tdata = self.TypeData(self)
tdata.name = typeId
tdata.typeId = typeId
tdata.lbitsize = 16
tdata.code = TypeCodeIntegral
self.registerType(typeId, tdata)
typeId = 'QChar'
tdata = self.TypeData(self)
tdata.name = typeId
tdata.typeId = typeId
tdata.lbitsize = 16
tdata.code = TypeCodeStruct
tdata.lfields = [self.Field(dumper=self, name='ucs', type='unsigned short', bitsize=16, bitpos=0)]
tdata.lalignment = 2
tdata.templateArguments = []
self.registerType(typeId, tdata)
def nativeDynamicType(self, address, baseType):
return baseType # Override in backends.
def listTemplateParameters(self, typename):
return self.listTemplateParametersManually(typename)
def listTemplateParametersManually(self, typename):
targs = []
if not typename.endswith('>'):
return targs
def push(inner):
# Handle local struct definitions like QList<main(int, char**)::SomeStruct>
inner = inner.strip()[::-1]
p = inner.find(')::')
if p > -1:
inner = inner[p+3:].strip()
if inner.startswith('const '):
inner = inner[6:].strip()
if inner.endswith(' const'):
inner = inner[:-6].strip()
#warn("FOUND: %s" % inner)
targs.append(inner)
#warn("SPLITTING %s" % typename)
level = 0
inner = ''
for c in typename[::-1]: # Reversed...
#warn("C: %s" % c)
if c == '>':
if level > 0:
inner += c
level += 1
elif c == '<':
level -= 1
if level > 0:
inner += c
else:
push(inner)
inner = ''
break
elif c == ',':
#warn('c: %s level: %s' % (c, level))
if level == 1:
push(inner)
inner = ''
else:
inner += c
else:
inner += c
#warn("TARGS: %s %s" % (typename, targs))
res = []
for item in targs[::-1]:
c = ord(item[0])
if c in (45, 46) or (c >= 48 and c < 58): # '-', '.' or digit.
if item.find('.') > -1:
res.append(float(item))
else:
if item.endswith('l'):
item = item[:-1]
if item.endswith('u'):
item = item[:-1]
val = toInteger(item)
if val > 0x80000000:
val -= 0x100000000
res.append(val)
else:
res.append(self.Type(self, item))
#warn("RES: %s %s" % (typename, [(None if t is None else t.name) for t in res]))
return res
# Hex decoding operating on str, return str.
def hexdecode(self, s):
if sys.version_info[0] == 2:
return s.decode('hex')
return bytes.fromhex(s).decode('utf8')
# Hex encoding operating on str or bytes, return str.
def hexencode(self, s):
if s is None:
s = ''
if sys.version_info[0] == 2:
if isinstance(s, buffer):
return bytes(s).encode('hex')
return s.encode('hex')
if isinstance(s, str):
s = s.encode('utf8')
return base64.b16encode(s).decode('utf8')
def isQt3Support(self):
# assume no Qt 3 support by default
return False
# Clamps size to limit.
def computeLimit(self, size, limit):
if limit == 0:
limit = self.displayStringLimit
if limit is None or size <= limit:
return 0, size
return size, limit
def vectorDataHelper(self, addr):
if self.qtVersion() >= 0x050000:
if self.ptrSize() == 4:
(ref, size, alloc, offset) = self.split('IIIp', addr)
else:
(ref, size, alloc, pad, offset) = self.split('IIIIp', addr)
alloc = alloc & 0x7ffffff
data = addr + offset
else:
(ref, alloc, size) = self.split('III', addr)
data = addr + 16
self.check(0 <= size and size <= alloc and alloc <= 1000 * 1000 * 1000)
return data, size, alloc
def byteArrayDataHelper(self, addr):
if self.qtVersion() >= 0x050000:
# QTypedArray:
# - QtPrivate::RefCount ref
# - int size
# - uint alloc : 31, capacityReserved : 1
# - qptrdiff offset
(ref, size, alloc, offset) = self.split('IIpp', addr)
alloc = alloc & 0x7ffffff
data = addr + offset
if self.ptrSize() == 4:
data = data & 0xffffffff
else:
data = data & 0xffffffffffffffff
elif self.qtVersion() >= 0x040000:
# Data:
# - QBasicAtomicInt ref;
# - int alloc, size;
# - [padding]
# - char *data;
if self.ptrSize() == 4:
(ref, alloc, size, data) = self.split('IIIp', addr)
else:
(ref, alloc, size, pad, data) = self.split('IIIIp', addr)
else:
# Data:
# - QShared count;
# - QChar *unicode
# - char *ascii
# - uint len: 30
(dummy, dummy, dummy, size) = self.split('IIIp', addr)
size = self.extractInt(addr + 3 * self.ptrSize()) & 0x3ffffff
alloc = size # pretend.
data = self.extractPointer(addr + self.ptrSize())
return data, size, alloc
# addr is the begin of a QByteArrayData structure
def encodeStringHelper(self, addr, limit):
# Should not happen, but we get it with LLDB as result
# of inferior calls
if addr == 0:
return 0, ''
data, size, alloc = self.byteArrayDataHelper(addr)
if alloc != 0:
self.check(0 <= size and size <= alloc and alloc <= 100*1000*1000)
elided, shown = self.computeLimit(size, limit)
return elided, self.readMemory(data, 2 * shown)
def encodeByteArrayHelper(self, addr, limit):
data, size, alloc = self.byteArrayDataHelper(addr)
if alloc != 0:
self.check(0 <= size and size <= alloc and alloc <= 100*1000*1000)
elided, shown = self.computeLimit(size, limit)
return elided, self.readMemory(data, shown)
def putCharArrayHelper(self, data, size, charType,
displayFormat = AutomaticFormat,
makeExpandable = True):
charSize = charType.size()
bytelen = size * charSize
elided, shown = self.computeLimit(bytelen, self.displayStringLimit)
mem = self.readMemory(data, shown)
if charSize == 1:
if displayFormat in (Latin1StringFormat, SeparateLatin1StringFormat):
encodingType = 'latin1'
else:
encodingType = 'utf8'
#childType = 'char'
elif charSize == 2:
encodingType = 'utf16'
#childType = 'short'
else:
encodingType = 'ucs4'
#childType = 'int'
self.putValue(mem, encodingType, elided=elided)
if displayFormat in (SeparateLatin1StringFormat, SeparateUtf8StringFormat, SeparateFormat):
elided, shown = self.computeLimit(bytelen, 100000)
self.putDisplay(encodingType + ':separate', self.readMemory(data, shown))
if makeExpandable:
self.putNumChild(size)
if self.isExpanded():
with Children(self):
for i in range(size):
self.putSubItem(size, self.createValue(data + i * charSize, charType))
def readMemory(self, addr, size):
return self.hexencode(bytes(self.readRawMemory(addr, size)))
def encodeByteArray(self, value, limit = 0):
elided, data = self.encodeByteArrayHelper(self.extractPointer(value), limit)
return data
def byteArrayData(self, value):
return self.byteArrayDataHelper(self.extractPointer(value))
def putByteArrayValue(self, value):
elided, data = self.encodeByteArrayHelper(self.extractPointer(value), self.displayStringLimit)
self.putValue(data, 'latin1', elided=elided)
def encodeString(self, value, limit = 0):
elided, data = self.encodeStringHelper(self.extractPointer(value), limit)
return data
def encodedUtf16ToUtf8(self, s):
return ''.join([chr(int(s[i:i+2], 16)) for i in range(0, len(s), 4)])
def encodeStringUtf8(self, value, limit = 0):
return self.encodedUtf16ToUtf8(self.encodeString(value, limit))
def stringData(self, value):
return self.byteArrayDataHelper(self.extractPointer(value))
def extractTemplateArgument(self, typename, position):
level = 0
skipSpace = False
inner = ''
for c in typename[typename.find('<') + 1 : -1]:
if c == '<':
inner += c
level += 1
elif c == '>':
level -= 1
inner += c
elif c == ',':
if level == 0:
if position == 0:
return inner.strip()
position -= 1
inner = ''
else:
inner += c
skipSpace = True
else:
if skipSpace and c == ' ':
pass
else:
inner += c
skipSpace = False
# Handle local struct definitions like QList<main(int, char**)::SomeStruct>
inner = inner.strip()
p = inner.find(')::')
if p > -1:
inner = inner[p+3:]
return inner
def putStringValue(self, value):
addr = self.extractPointer(value)
elided, data = self.encodeStringHelper(addr, self.displayStringLimit)
self.putValue(data, 'utf16', elided=elided)
def putPtrItem(self, name, value):
with SubItem(self, name):
self.putValue('0x%x' % value)
self.putType('void*')
self.putNumChild(0)
def putIntItem(self, name, value):
with SubItem(self, name):
if isinstance(value, self.Value):
self.putValue(value.display())
else:
self.putValue(value)
self.putType('int')
self.putNumChild(0)
def putBoolItem(self, name, value):
with SubItem(self, name):
self.putValue(value)
self.putType('bool')
self.putNumChild(0)
def putPairItem(self, index, pair, keyName='first', valueName='second'):
with SubItem(self, index):
self.putPairContents(index, pair, keyName, valueName)
def putPairContents(self, index, pair, kname, vname):
with Children(self):
first, second = pair if isinstance(pair, tuple) else pair.members(False)
key = self.putSubItem(kname, first)
value = self.putSubItem(vname, second)
if index is not None:
self.putField('keyprefix', '[%s] ' % index)
self.putField('key', key.value)
if key.encoding is not None:
self.putField('keyencoded', key.encoding)
self.putValue(value.value, value.encoding)
def putEnumValue(self, value, vals):
ival = value.integer()
nice = vals.get(ival, None)
display = ('%d' % ival) if nice is None else ('%s (%d)' % (nice, ival))
self.putValue(display)
self.putNumChild(0)
def putCallItem(self, name, rettype, value, func, *args):
with SubItem(self, name):
try:
result = self.callHelper(rettype, value, func, args)
except Exception as error:
if self.passExceptions:
raise error
children = [('error', error)]
self.putSpecialValue("notcallable", children=children)
else:
self.putItem(result)
def call(self, rettype, value, func, *args):
return self.callHelper(rettype, value, func, args)
def putAddress(self, address):
if address is not None and not self.isCli:
self.put('address="0x%x",' % address)
def putPlainChildren(self, value, dumpBase = True):
self.putEmptyValue(-99)
self.putNumChild(1)
if self.isExpanded():
with Children(self):
self.putFields(value, dumpBase)
def putNamedChildren(self, values, names):
self.putEmptyValue(-99)
self.putNumChild(1)
if self.isExpanded():
with Children(self):
for n, v in zip(names, values):
self.putSubItem(n, v)
def prettySymbolByAddress(self, address):
return '0x%x' % address
def putSymbolValue(self, address):
self.putValue(self.prettySymbolByAddress(address))
def putVTableChildren(self, item, itemCount):
p = item.pointer()
for i in xrange(itemCount):
deref = self.extractPointer(p)
if deref == 0:
itemCount = i
break
with SubItem(self, i):
self.putItem(self.createPointerValue(deref, 'void'))
p += self.ptrSize()
return itemCount
def putFields(self, value, dumpBase = True):
baseIndex = 0
for item in value.members(True):
if item.name is not None:
if item.name.startswith('_vptr.') or item.name.startswith('__vfptr'):
with SubItem(self, '[vptr]'):
# int (**)(void)
self.putType(' ')
self.putField('sortgroup', 20)
self.putValue(item.name)
n = 100
if self.isExpanded():
with Children(self):
n = self.putVTableChildren(item, n)
self.putNumChild(n)
continue
if item.isBaseClass and dumpBase:
baseIndex += 1
# We cannot use nativeField.name as part of the iname as
# it might contain spaces and other strange characters.
with UnnamedSubItem(self, "@%d" % baseIndex):
self.putField('iname', self.currentIName)
self.putField('name', '[%s]' % item.name)
self.putField('sortgroup', 1000 - baseIndex)
self.putAddress(item.address())
self.putItem(item)
continue
with SubItem(self, item.name):
self.putItem(item)
def putMembersItem(self, value, sortorder = 10):
with SubItem(self, '[members]'):
self.putField('sortgroup', sortorder)
self.putPlainChildren(value)
def put(self, stuff):
self.output += stuff
def check(self, exp):
if not exp:
error('Check failed: %s' % exp)
def checkRef(self, ref):
# Assume there aren't a million references to any object.
self.check(ref >= -1)
self.check(ref < 1000000)
def checkIntType(self, thing):
if not self.isInt(thing):
error('Expected an integral value, got %s' % type(thing))
def readToFirstZero(self, base, tsize, maximum):
self.checkIntType(base)
self.checkIntType(tsize)
self.checkIntType(maximum)
code = self.packCode + (None, 'b', 'H', None, 'I')[tsize]
#blob = self.readRawMemory(base, 1)
blob = bytes()
while maximum > 1:
try:
blob = self.readRawMemory(base, maximum)
break
except:
maximum = int(maximum / 2)
warn('REDUCING READING MAXIMUM TO %s' % maximum)
#warn('BASE: 0x%x TSIZE: %s MAX: %s' % (base, tsize, maximum))
for i in xrange(0, maximum, tsize):
t = struct.unpack_from(code, blob, i)[0]
if t == 0:
return 0, i, self.hexencode(blob[:i])
# Real end is unknown.
return -1, maximum, self.hexencode(blob[:maximum])
def encodeCArray(self, p, tsize, limit):
elided, shown, blob = self.readToFirstZero(p, tsize, limit)
return elided, blob
def putItemCount(self, count, maximum = 1000000000):
# This needs to override the default value, so don't use 'put' directly.
if count > maximum:
self.putSpecialValue('minimumitemcount', maximum)
else:
self.putSpecialValue('itemcount', count)
self.putNumChild(count)
def resultToMi(self, value):
if type(value) is bool:
return '"%d"' % int(value)
if type(value) is dict:
return '{' + ','.join(['%s=%s' % (k, self.resultToMi(v))
for (k, v) in list(value.items())]) + '}'
if type(value) is list:
return '[' + ','.join([self.resultToMi(k)
for k in list(value.items())]) + ']'
return '"%s"' % value
def variablesToMi(self, value, prefix):
if type(value) is bool:
return '"%d"' % int(value)
if type(value) is dict:
pairs = []
for (k, v) in list(value.items()):
if k == 'iname':
if v.startswith('.'):
v = '"%s%s"' % (prefix, v)
else:
v = '"%s"' % v
else:
v = self.variablesToMi(v, prefix)
pairs.append('%s=%s' % (k, v))
return '{' + ','.join(pairs) + '}'
if type(value) is list:
index = 0
pairs = []
for item in value:
if item.get('type', '') == 'function':
continue
name = item.get('name', '')
if len(name) == 0:
name = str(index)
index += 1
pairs.append((name, self.variablesToMi(item, prefix)))
pairs.sort(key = lambda pair: pair[0])
return '[' + ','.join([pair[1] for pair in pairs]) + ']'
return '"%s"' % value
def filterPrefix(self, prefix, items):
return [i[len(prefix):] for i in items if i.startswith(prefix)]
def tryFetchInterpreterVariables(self, args):
if not int(args.get('nativemixed', 0)):
return (False, '')
context = args.get('context', '')
if not len(context):
return (False, '')
expanded = args.get('expanded')
args['expanded'] = self.filterPrefix('local', expanded)
res = self.sendInterpreterRequest('variables', args)
if not res:
return (False, '')
reslist = []
for item in res.get('variables', {}):
if not 'iname' in item:
item['iname'] = '.' + item.get('name')
reslist.append(self.variablesToMi(item, 'local'))
watchers = args.get('watchers', None)
if watchers:
toevaluate = []
name2expr = {}
seq = 0
for watcher in watchers:
expr = self.hexdecode(watcher.get('exp'))
name = str(seq)
toevaluate.append({'name': name, 'expression': expr})
name2expr[name] = expr
seq += 1
args['expressions'] = toevaluate
args['expanded'] = self.filterPrefix('watch', expanded)
del args['watchers']
res = self.sendInterpreterRequest('expressions', args)
if res:
for item in res.get('expressions', {}):
name = item.get('name')
iname = 'watch.' + name
expr = name2expr.get(name)
item['iname'] = iname
item['wname'] = self.hexencode(expr)
item['exp'] = expr
reslist.append(self.variablesToMi(item, 'watch'))
return (True, 'data=[%s]' % ','.join(reslist))
def putField(self, name, value):
self.put('%s="%s",' % (name, value))
def putType(self, typish, priority = 0):
# Higher priority values override lower ones.
if priority >= self.currentType.priority:
if isinstance(typish, str):
self.currentType.value = typish
else:
self.currentType.value = typish.name
self.currentType.priority = priority
def putValue(self, value, encoding = None, priority = 0, elided = None):
# Higher priority values override lower ones.
# elided = 0 indicates all data is available in value,
# otherwise it's the true length.
if priority >= self.currentValue.priority:
self.currentValue = ReportItem(value, encoding, priority, elided)
def putSpecialValue(self, encoding, value = '', children = None):
self.putValue(value, encoding)
if children is not None:
self.putNumChild(1)
if self.isExpanded():
with Children(self):
for name, value in children:
with SubItem(self, name):
self.putValue(str(value).replace('"', '$'))
def putEmptyValue(self, priority = -10):
if priority >= self.currentValue.priority:
self.currentValue = ReportItem('', None, priority, None)
def putName(self, name):
self.putField('name', name)
def putBetterType(self, typish):
if isinstance(typish, ReportItem):
self.currentType.value = typish.value
elif isinstance(typish, str):
self.currentType.value = typish
else:
self.currentType.value = typish.name
self.currentType.priority += 1
def putNoType(self):
# FIXME: replace with something that does not need special handling
# in SubItem.__exit__().
self.putBetterType(' ')
def putInaccessible(self):
#self.putBetterType(' ')
self.putNumChild(0)
self.currentValue.value = None
def putNamedSubItem(self, component, value, name):
with SubItem(self, component):
self.putName(name)
self.putItem(value)
def isExpanded(self):
#warn('IS EXPANDED: %s in %s: %s' % (self.currentIName,
# self.expandedINames, self.currentIName in self.expandedINames))
return self.currentIName in self.expandedINames
def mangleName(self, typeName):
return '_ZN%sE' % ''.join(map(lambda x: '%d%s' % (len(x), x),
typeName.split('::')))
def putCStyleArray(self, value):
arrayType = value.type.unqualified()
innerType = arrayType.ltarget
if innerType is None:
innerType = value.type.target().unqualified()
address = value.address()
if address:
self.putValue('@0x%x' % address, priority = -1)
else:
self.putEmptyValue()
self.putType(arrayType)
displayFormat = self.currentItemFormat()
arrayByteSize = arrayType.size()
if arrayByteSize == 0:
# This should not happen. But it does, see QTCREATORBUG-14755.
# GDB/GCC produce sizeof == 0 for QProcess arr[3]
# And in the Nim string dumper.
s = value.type.name
itemCount = s[s.find('[')+1:s.find(']')]
if not itemCount:
itemCount = '100'
arrayByteSize = int(itemCount) * innerType.size();
n = arrayByteSize // innerType.size()
p = value.address()
if displayFormat != RawFormat and p:
if innerType.name in ('char', 'wchar_t', 'unsigned char', 'signed char'):
self.putCharArrayHelper(p, n, innerType, self.currentItemFormat(),
makeExpandable = False)
else:
self.tryPutSimpleFormattedPointer(p, arrayType, innerType,
displayFormat, arrayByteSize)
self.putNumChild(n)
if self.isExpanded():
self.putArrayData(p, n, innerType)
self.putPlotDataHelper(p, n, innerType)
def cleanAddress(self, addr):
if addr is None:
return '<no address>'
return '0x%x' % toInteger(hex(addr), 16)
def stripNamespaceFromType(self, typeName):
ns = self.qtNamespace()
if len(ns) > 0 and typeName.startswith(ns):
typeName = typeName[len(ns):]
pos = typeName.find('<')
# FIXME: make it recognize foo<A>::bar<B>::iterator?
while pos != -1:
pos1 = typeName.rfind('>', pos)
typeName = typeName[0:pos] + typeName[pos1+1:]
pos = typeName.find('<')
return typeName
def tryPutPrettyItem(self, typeName, value):
value.check()
if self.useFancy and self.currentItemFormat() != RawFormat:
self.putType(typeName)
nsStrippedType = self.stripNamespaceFromType(typeName)\
.replace('::', '__')
#warn('STRIPPED: %s' % nsStrippedType)
# The following block is only needed for D.
if nsStrippedType.startswith('_A'):
# DMD v2.058 encodes string[] as _Array_uns long long.
# With spaces.
if nsStrippedType.startswith('_Array_'):
qdump_Array(self, value)
return True
if nsStrippedType.startswith('_AArray_'):
qdump_AArray(self, value)
return True
dumper = self.qqDumpers.get(nsStrippedType)
#warn('DUMPER: %s' % dumper)
if dumper is not None:
dumper(self, value)
return True
for pattern in self.qqDumpersEx.keys():
dumper = self.qqDumpersEx[pattern]
if re.match(pattern, nsStrippedType):
dumper(self, value)
return True
return False
def putSimpleCharArray(self, base, size = None):
if size is None:
elided, shown, data = self.readToFirstZero(base, 1, self.displayStringLimit)
else:
elided, shown = self.computeLimit(int(size), self.displayStringLimit)
data = self.readMemory(base, shown)
self.putValue(data, 'latin1', elided=elided)
def putDisplay(self, editFormat, value):
self.putField('editformat', editFormat)
self.putField('editvalue', value)
# This is shared by pointer and array formatting.
def tryPutSimpleFormattedPointer(self, ptr, typeName, innerType, displayFormat, limit):
if displayFormat == AutomaticFormat:
if innerType.name in ('char', 'signed char', 'unsigned char'):
# Use UTF-8 as default for char *.
self.putType(typeName)
(elided, shown, data) = self.readToFirstZero(ptr, 1, limit)
self.putValue(data, 'utf8', elided=elided)
if self.isExpanded():
self.putArrayData(ptr, shown, innerType)
return True
if innerType.name == 'wchar_t':
self.putType(typeName)
charSize = self.lookupType('wchar_t').size()
(elided, data) = self.encodeCArray(ptr, charSize, limit)
if charSize == 2:
self.putValue(data, 'utf16', elided=elided)
else:
self.putValue(data, 'ucs4', elided=elided)
return True
if displayFormat == Latin1StringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 1, limit)
self.putValue(data, 'latin1', elided=elided)
return True
if displayFormat == SeparateLatin1StringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 1, limit)
self.putValue(data, 'latin1', elided=elided)
self.putDisplay('latin1:separate', data)
return True
if displayFormat == Utf8StringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 1, limit)
self.putValue(data, 'utf8', elided=elided)
return True
if displayFormat == SeparateUtf8StringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 1, limit)
self.putValue(data, 'utf8', elided=elided)
self.putDisplay('utf8:separate', data)
return True
if displayFormat == Local8BitStringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 1, limit)
self.putValue(data, 'local8bit', elided=elided)
return True
if displayFormat == Utf16StringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 2, limit)
self.putValue(data, 'utf16', elided=elided)
return True
if displayFormat == Ucs4StringFormat:
self.putType(typeName)
(elided, data) = self.encodeCArray(ptr, 4, limit)
self.putValue(data, 'ucs4', elided=elided)
return True
return False
def putFormattedPointer(self, value):
self.preping('formattedPointer')
self.putFormattedPointerX(value)
self.ping('formattedPointer')
def putDerefedPointer(self, value):
derefValue = value.dereference()
innerType = value.type.target() #.unqualified()
self.putType(innerType)
savedCurrentChildType = self.currentChildType
self.currentChildType = innerType.name
derefValue.name = '*'
self.putItem(derefValue)
self.currentChildType = savedCurrentChildType
def putFormattedPointerX(self, value):
self.putOriginalAddress(value.address())
#warn("PUT FORMATTED: %s" % value)
pointer = value.pointer()
self.putAddress(pointer)
#warn('POINTER: 0x%x' % pointer)
if pointer == 0:
#warn('NULL POINTER')
self.putType(value.type)
self.putValue('0x0')
self.putNumChild(0)
return
typeName = value.type.name
try:
self.readRawMemory(pointer, 1)
except:
# Failure to dereference a pointer should at least
# show the value of a pointer.
#warn('BAD POINTER: %s' % value)
self.putValue('0x%x' % pointer)
self.putType(typeName)
self.putNumChild(0)
return
if self.currentIName.endswith('.this'):
self.putDerefedPointer(value)
return
displayFormat = self.currentItemFormat(value.type.name)
innerType = value.type.target() #.unqualified()
if innerType.name == 'void':
#warn('VOID POINTER: %s' % displayFormat)
self.putType(typeName)
self.putSymbolValue(pointer)
self.putNumChild(0)
return
if displayFormat == RawFormat:
# Explicitly requested bald pointer.
#warn('RAW')
self.putType(typeName)
self.putValue('0x%x' % pointer)
self.putNumChild(1)
if self.currentIName in self.expandedINames:
with Children(self):
with SubItem(self, '*'):
self.putItem(value.dereference())
return
limit = self.displayStringLimit
if displayFormat in (SeparateLatin1StringFormat, SeparateUtf8StringFormat):
limit = 1000000
if self.tryPutSimpleFormattedPointer(pointer, typeName,
innerType, displayFormat, limit):
self.putNumChild(1)
return
if Array10Format <= displayFormat and displayFormat <= Array1000Format:
n = (10, 100, 1000, 10000)[displayFormat - Array10Format]
self.putType(typeName)
self.putItemCount(n)
self.putArrayData(value.pointer(), n, innerType)
return
if innerType.code == TypeCodeFunction:
# A function pointer.
self.putSymbolValue(pointer)
self.putType(typeName)
self.putNumChild(0)
return
#warn('AUTODEREF: %s' % self.autoDerefPointers)
#warn('INAME: %s' % self.currentIName)
#warn('INNER: %s' % innerType.name)
if self.autoDerefPointers:
# Generic pointer type with AutomaticFormat, but never dereference char types:
if innerType.name not in ('char', 'signed char', 'unsigned char', 'wchar_t'):
self.putDerefedPointer(value)
return
#warn('GENERIC PLAIN POINTER: %s' % value.type)
#warn('ADDR PLAIN POINTER: 0x%x' % value.laddress)
self.putType(typeName)
self.putSymbolValue(pointer)
self.putNumChild(1)
if self.currentIName in self.expandedINames:
with Children(self):
with SubItem(self, '*'):
self.putItem(value.dereference())
def putOriginalAddress(self, address):
if address is not None:
self.put('origaddr="0x%x",' % address)
def putQObjectNameValue(self, value):
try:
# dd = value['d_ptr']['d'] is just behind the vtable.
(vtable, dd) = self.split('pp', value)
if not self.couldBeQObjectVTable(vtable):
return False
intSize = 4
ptrSize = self.ptrSize()
if self.qtVersion() < 0x050000:
# Size of QObjectData: 5 pointer + 2 int
# - vtable
# - QObject *q_ptr;
# - QObject *parent;
# - QObjectList children;
# - uint isWidget : 1; etc..
# - int postedEvents;
# - QMetaObject *metaObject;
# Offset of objectName in QObjectPrivate: 5 pointer + 2 int
# - [QObjectData base]
# - QString objectName
objectName = self.extractPointer(dd + 5 * ptrSize + 2 * intSize)
else:
# Size of QObjectData: 5 pointer + 2 int
# - vtable
# - QObject *q_ptr;
# - QObject *parent;
# - QObjectList children;
# - uint isWidget : 1; etc...
# - int postedEvents;
# - QDynamicMetaObjectData *metaObject;
extra = self.extractPointer(dd + 5 * ptrSize + 2 * intSize)
if extra == 0:
return False
# Offset of objectName in ExtraData: 6 pointer
# - QVector<QObjectUserData *> userData; only #ifndef QT_NO_USERDATA
# - QList<QByteArray> propertyNames;
# - QList<QVariant> propertyValues;
# - QVector<int> runningTimers;
# - QList<QPointer<QObject> > eventFilters;
# - QString objectName
objectName = self.extractPointer(extra + 5 * ptrSize)
data, size, alloc = self.byteArrayDataHelper(objectName)
# Object names are short, and GDB can crash on to big chunks.
# Since this here is a convenience feature only, limit it.
if size <= 0 or size > 80:
return False
raw = self.readMemory(data, 2 * size)
self.putValue(raw, 'utf16', 1)
return True
except:
# warn('NO QOBJECT: %s' % value.type)
return False
def couldBePointer(self, p):
if self.ptrSize() == 4:
return p > 100000 and (p & 0x3 == 0)
else:
return p > 100000 and (p & 0x7 == 0) and (p < 0x7fffffffffff)
def couldBeVTableEntry(self, p):
if self.ptrSize() == 4:
return p > 100000 and (p & 0x1 == 0)
else:
return p > 100000 and (p & 0x1 == 0) and (p < 0x7fffffffffff)
def couldBeQObjectPointer(self, objectPtr):
try:
vtablePtr, dd = self.split('pp', objectPtr)
except:
self.bump('nostruct-1')
return False
try:
dvtablePtr, qptr, parentPtr = self.split('ppp', dd)
except:
self.bump('nostruct-2')
return False
# Check d_ptr.d.q_ptr == objectPtr
if qptr != objectPtr:
self.bump('q_ptr')
return False
return self.couldBeQObjectVTable(vtablePtr)
def couldBeQObjectVTable(self, vtablePtr):
def getJumpAddress_x86(dumper, address):
relativeJumpCode = 0xe9
jumpCode = 0xff
try:
data = dumper.readRawMemory(address, 6)
except:
return 0
primaryOpcode = data[0]
if primaryOpcode == relativeJumpCode:
# relative jump on 32 and 64 bit with a 32bit offset
offset = int.from_bytes(data[1:5], byteorder='little')
return address + 5 + offset
if primaryOpcode == jumpCode:
if data[1] != 0x25: # check for known extended opcode
return 0
# 0xff25 is a relative jump on 64bit and an absolute jump on 32 bit
if self.ptrSize() == 8:
offset = int.from_bytes(data[2:6], byteorder='little')
return address + 6 + offset
else:
return int.from_bytes(data[2:6], byteorder='little')
return 0
# Do not try to extract a function pointer if there are no values to compare with
if self.qtCustomEventFunc == 0 and self.qtCustomEventPltFunc == 0:
return False
try:
customEventOffset = 8 if self.isMsvcTarget() else 9
customEventFunc = self.extractPointer(vtablePtr + customEventOffset * self.ptrSize())
except:
self.bump('nostruct-3')
return False
if self.isWindowsTarget():
if customEventFunc in (self.qtCustomEventFunc, self.qtCustomEventPltFunc):
return True
# The vtable may point to a function that is just calling the customEvent function
customEventFunc = getJumpAddress_x86(self, customEventFunc)
if customEventFunc in (self.qtCustomEventFunc, self.qtCustomEventPltFunc):
return True
customEventFunc = self.extractPointer(customEventFunc)
if customEventFunc in (self.qtCustomEventFunc, self.qtCustomEventPltFunc):
return True
# If the object is defined in another module there may be another level of indirection
customEventFunc = getJumpAddress_x86(self, customEventFunc)
return customEventFunc in (self.qtCustomEventFunc, self.qtCustomEventPltFunc)
# def extractQObjectProperty(objectPtr):
# vtablePtr = self.extractPointer(objectPtr)
# metaObjectFunc = self.extractPointer(vtablePtr)
# cmd = '((void*(*)(void*))0x%x)((void*)0x%x)' % (metaObjectFunc, objectPtr)
# try:
# #warn('MO CMD: %s' % cmd)
# res = self.parseAndEvaluate(cmd)
# #warn('MO RES: %s' % res)
# self.bump('successfulMetaObjectCall')
# return res.pointer()
# except:
# self.bump('failedMetaObjectCall')
# #warn('COULD NOT EXECUTE: %s' % cmd)
# return 0
def extractMetaObjectPtr(self, objectPtr, typeobj):
""" objectPtr - address of *potential* instance of QObject derived class
typeobj - type of *objectPtr if known, None otherwise. """
if objectPtr is not None:
self.checkIntType(objectPtr)
def extractMetaObjectPtrFromAddress():
#return 0
# FIXME: Calling 'works' but seems to impact memory contents(!)
# in relevant places. One symptom is that object name
# contents 'vanishes' as the reported size of the string
# gets zeroed out(?).
# Try vtable, metaObject() is the first entry.
vtablePtr = self.extractPointer(objectPtr)
metaObjectFunc = self.extractPointer(vtablePtr)
cmd = '((void*(*)(void*))0x%x)((void*)0x%x)' % (metaObjectFunc, objectPtr)
try:
#warn('MO CMD: %s' % cmd)
res = self.parseAndEvaluate(cmd)
#warn('MO RES: %s' % res)
self.bump('successfulMetaObjectCall')
return res.pointer()
except:
self.bump('failedMetaObjectCall')
#warn('COULD NOT EXECUTE: %s' % cmd)
return 0
def extractStaticMetaObjectFromTypeHelper(someTypeObj):
if someTypeObj.isSimpleType():
return 0
typeName = someTypeObj.name
isQObjectProper = typeName == self.qtNamespace() + 'QObject'
# No templates for now.
if typeName.find('<') >= 0:
return 0
result = self.findStaticMetaObject(someTypeObj)
# We need to distinguish Q_OBJECT from Q_GADGET:
# a Q_OBJECT SMO has a non-null superdata (unless it's QObject itself),
# a Q_GADGET SMO has a null superdata (hopefully)
if result and not isQObjectProper:
superdata = self.extractPointer(result)
if superdata == 0:
# This looks like a Q_GADGET
return 0
return result
def extractStaticMetaObjectPtrFromType(someTypeObj):
if someTypeObj is None:
return 0
someTypeName = someTypeObj.name
self.bump('metaObjectFromType')
known = self.knownStaticMetaObjects.get(someTypeName, None)
if known is not None: # Is 0 or the static metaobject.
return known
result = 0
#try:
result = extractStaticMetaObjectFromTypeHelper(someTypeObj)
#except RuntimeError as error:
# warn('METAOBJECT EXTRACTION FAILED: %s' % error)
#except:
# warn('METAOBJECT EXTRACTION FAILED FOR UNKNOWN REASON')
#if not result:
# base = someTypeObj.firstBase()
# if base is not None and base != someTypeObj: # sanity check
# result = extractStaticMetaObjectPtrFromType(base)
if result:
self.knownStaticMetaObjects[someTypeName] = result
return result
if not self.useFancy:
return 0
ptrSize = self.ptrSize()
typeName = typeobj.name
result = self.knownStaticMetaObjects.get(typeName, None)
if result is not None: # Is 0 or the static metaobject.
self.bump('typecached')
#warn('CACHED RESULT: %s %s 0x%x' % (self.currentIName, typeName, result))
return result
if not self.couldBeQObjectPointer(objectPtr):
self.bump('cannotBeQObject')
#warn('DOES NOT LOOK LIKE A QOBJECT: %s' % self.currentIName)
return 0
metaObjectPtr = 0
if not metaObjectPtr:
# measured: 3 ms (example had one level of inheritance)
self.preping('metaObjectType-' + self.currentIName)
metaObjectPtr = extractStaticMetaObjectPtrFromType(typeobj)
self.ping('metaObjectType-' + self.currentIName)
if not metaObjectPtr:
# measured: 200 ms (example had one level of inheritance)
self.preping('metaObjectCall-' + self.currentIName)
metaObjectPtr = extractMetaObjectPtrFromAddress()
self.ping('metaObjectCall-' + self.currentIName)
#if metaObjectPtr:
# self.bump('foundMetaObject')
# self.knownStaticMetaObjects[typeName] = metaObjectPtr
return metaObjectPtr
def split(self, pattern, value):
if isinstance(value, self.Value):
return value.split(pattern)
if self.isInt(value):
val = self.Value(self)
val.laddress = value
return val.split(pattern)
error('CANNOT EXTRACT STRUCT FROM %s' % type(value))
def extractCString(self, addr):
result = bytearray()
while True:
d = self.extractByte(addr)
if d == 0:
break
result.append(d)
addr += 1
return result
def listChildrenGenerator(self, addr, innerType):
base = self.extractPointer(addr)
(ref, alloc, begin, end) = self.split('IIII', base)
array = base + 16
if self.qtVersion() < 0x50000:
array += self.ptrSize()
size = end - begin
stepSize = self.ptrSize()
data = array + begin * stepSize
for i in range(size):
yield self.createValue(data + i * stepSize, innerType)
#yield self.createValue(data + i * stepSize, 'void*')
def vectorChildrenGenerator(self, addr, innerType):
base = self.extractPointer(addr)
data, size, alloc = self.vectorDataHelper(base)
for i in range(size):
yield self.createValue(data + i * innerType.size(), innerType)
def putTypedPointer(self, name, addr, typeName):
""" Prints a typed pointer, expandable if the type can be resolved,
and without children otherwise """
with SubItem(self, name):
self.putAddress(addr)
self.putValue('@0x%x' % addr)
typeObj = self.lookupType(typeName)
if typeObj:
self.putType(typeObj)
self.putNumChild(1)
if self.isExpanded():
with Children(self):
self.putFields(self.createValue(addr, typeObj))
else:
self.putType(typeName)
self.putNumChild(0)
# This is called is when a QObject derived class is expanded
def tryPutQObjectGuts(self, value):
metaObjectPtr = self.extractMetaObjectPtr(value.address(), value.type)
if metaObjectPtr:
self.putQObjectGutsHelper(value, value.address(),
-1, metaObjectPtr, 'QObject')
def metaString(self, metaObjectPtr, index, revision):
ptrSize = self.ptrSize()
stringdata = self.extractPointer(toInteger(metaObjectPtr) + ptrSize)
if revision >= 7: # Qt 5.
byteArrayDataSize = 24 if ptrSize == 8 else 16
literal = stringdata + toInteger(index) * byteArrayDataSize
ldata, lsize, lalloc = self.byteArrayDataHelper(literal)
try:
s = struct.unpack_from('%ds' % lsize, self.readRawMemory(ldata, lsize))[0]
return s if sys.version_info[0] == 2 else s.decode('utf8')
except:
return '<not available>'
else: # Qt 4.
ldata = stringdata + index
return self.extractCString(ldata).decode('utf8')
def putQMetaStuff(self, value, origType):
(metaObjectPtr, handle) = value.split('pI')
if metaObjectPtr != 0:
dataPtr = self.extractPointer(metaObjectPtr + 2 * self.ptrSize())
index = self.extractInt(dataPtr + 4 * handle)
revision = 7 if self.qtVersion() >= 0x050000 else 6
name = self.metaString(metaObjectPtr, index, revision)
self.putValue(name)
self.putNumChild(1)
if self.isExpanded():
with Children(self):
self.putFields(value)
self.putQObjectGutsHelper(0, 0, handle, metaObjectPtr, origType)
else:
self.putEmptyValue()
if self.isExpanded():
with Children(self):
self.putFields(value)
# basically all meta things go through this here.
# qobject and qobjectPtr are non-null if coming from a real structure display
# qobject == 0, qobjectPtr != 0 is possible for builds without QObject debug info
# if qobject == 0, properties and d-ptr cannot be shown.
# handle is what's store in QMetaMethod etc, pass -1 for QObject/QMetaObject
# itself metaObjectPtr needs to point to a valid QMetaObject.
def putQObjectGutsHelper(self, qobject, qobjectPtr, handle, metaObjectPtr, origType):
intSize = 4
ptrSize = self.ptrSize()
def putt(name, value, typeName = ' '):
with SubItem(self, name):
self.putValue(value)
self.putType(typeName)
self.putNumChild(0)
def extractSuperDataPtr(someMetaObjectPtr):
#return someMetaObjectPtr['d']['superdata']
return self.extractPointer(someMetaObjectPtr)
def extractDataPtr(someMetaObjectPtr):
# dataPtr = metaObjectPtr['d']['data']
return self.extractPointer(someMetaObjectPtr + 2 * ptrSize)
isQMetaObject = origType == 'QMetaObject'
isQObject = origType == 'QObject'
#warn('OBJECT GUTS: %s 0x%x ' % (self.currentIName, metaObjectPtr))
dataPtr = extractDataPtr(metaObjectPtr)
#warn('DATA PTRS: %s 0x%x ' % (self.currentIName, dataPtr))
(revision, classname,
classinfo, classinfo2,
methodCount, methods,
propertyCount, properties,
enumCount, enums,
constructorCount, constructors,
flags, signalCount) = self.split('I' * 14, dataPtr)
largestStringIndex = -1
for i in range(methodCount):
t = self.split('IIIII', dataPtr + 56 + i * 20)
if largestStringIndex < t[0]:
largestStringIndex = t[0]
ns = self.qtNamespace()
extraData = 0
if qobjectPtr:
dd = self.extractPointer(qobjectPtr + ptrSize)
if self.qtVersion() >= 0x50000:
(dvtablePtr, qptr, parentPtr, childrenDPtr, flags, postedEvents,
dynMetaObjectPtr, # Up to here QObjectData.
extraData, threadDataPtr, connectionListsPtr,
sendersPtr, currentSenderPtr) \
= self.split('ppppIIp' + 'ppppp', dd)
else:
(dvtablePtr, qptr, parentPtr, childrenDPtr, flags, postedEvents,
dynMetaObjectPtr, # Up to here QObjectData
objectName, extraData, threadDataPtr, connectionListsPtr,
sendersPtr, currentSenderPtr) \
= self.split('ppppIIp' + 'pppppp', dd)
if qobjectPtr:
qobjectType = self.createType('QObject')
qobjectPtrType = self.createType('QObject') # FIXME.
with SubItem(self, '[parent]'):
self.putField('sortgroup', 9)
self.putItem(self.createValue(parentPtr, qobjectPtrType))
with SubItem(self, '[children]'):
self.putField('sortgroup', 8)
base = self.extractPointer(dd + 3 * ptrSize) # It's a QList<QObject *>
begin = self.extractInt(base + 8)
end = self.extractInt(base + 12)
array = base + 16
if self.qtVersion() < 0x50000:
array += ptrSize
self.check(begin >= 0 and end >= 0 and end <= 1000 * 1000 * 1000)
size = end - begin
self.check(size >= 0)
self.putItemCount(size)
if self.isExpanded():
addrBase = array + begin * ptrSize
with Children(self, size):
for i in self.childRange():
with SubItem(self, i):
childPtr = self.extractPointer(addrBase + i * ptrSize)
self.putItem(self.createValue(childPtr, qobjectType))
if isQMetaObject:
with SubItem(self, '[strings]'):
self.putField('sortgroup', 2)
if largestStringIndex > 0:
self.putSpecialValue('minimumitemcount', largestStringIndex)
self.putNumChild(1)
if self.isExpanded():
with Children(self, largestStringIndex + 1):
for i in self.childRange():
with SubItem(self, i):
s = self.metaString(metaObjectPtr, i, revision)
self.putValue(self.hexencode(s), 'latin1')
self.putNumChild(0)
else:
self.putValue(' ')
self.putNumChild(0)
if isQMetaObject:
with SubItem(self, '[raw]'):
self.putField('sortgroup', 1)
self.putEmptyValue()
self.putNumChild(1)
if self.isExpanded():
with Children(self):
putt('revision', revision)
putt('classname', classname)
putt('classinfo', classinfo)
putt('methods', '%d %d' % (methodCount, methods))
putt('properties', '%d %d' % (propertyCount, properties))
putt('enums/sets', '%d %d' % (enumCount, enums))
putt('constructors', '%d %d' % (constructorCount, constructors))
putt('flags', flags)
putt('signalCount', signalCount)
for i in range(methodCount):
t = self.split('IIIII', dataPtr + 56 + i * 20)
putt('method %d' % i, '%s %s %s %s %s' % t)
if isQObject:
with SubItem(self, '[extra]'):
self.putField('sortgroup', 1)
self.putEmptyValue()
self.putNumChild(1)
if self.isExpanded():
with Children(self):
if extraData:
self.putTypedPointer('[extraData]', extraData,
ns + 'QObjectPrivate::ExtraData')
with SubItem(self, '[metaObject]'):
self.putAddress(metaObjectPtr)
self.putNumChild(1)
if self.isExpanded():
with Children(self):
self.putQObjectGutsHelper(0, 0, -1, metaObjectPtr, 'QMetaObject')
with SubItem(self, '[connections]'):
if connectionListsPtr:
typeName = ns + 'QVector<' + ns + 'QObjectPrivate::ConnectionList>'
self.putItem(self.createValue(connectionListsPtr, typeName))
else:
self.putItemCount(0)
with SubItem(self, '[signals]'):
self.putItemCount(signalCount)
if self.isExpanded():
with Children(self):
j = -1
for i in range(signalCount):
t = self.split('IIIII', dataPtr + 56 + 20 * i)
flags = t[4]
if flags != 0x06:
continue
j += 1
with SubItem(self, j):
name = self.metaString(metaObjectPtr, t[0], revision)
self.putType(' ')
self.putValue(name)
self.putNumChild(1)
with Children(self):
putt('[nameindex]', t[0])
#putt('[type]', 'signal')
putt('[argc]', t[1])
putt('[parameter]', t[2])
putt('[tag]', t[3])
putt('[flags]', t[4])
putt('[localindex]', str(i))
putt('[globalindex]', str(globalOffset + i))
#self.putQObjectConnections(dd)
if isQMetaObject or isQObject:
with SubItem(self, '[properties]'):
self.putField('sortgroup', 5)
if self.isExpanded():
dynamicPropertyCount = 0
with Children(self):
# Static properties.
for i in range(propertyCount):
t = self.split('III', dataPtr + properties * 4 + 12 * i)
name = self.metaString(metaObjectPtr, t[0], revision)
if qobject and self.qtPropertyFunc:
# LLDB doesn't like calling it on a derived class, possibly
# due to type information living in a different shared object.
#base = self.createValue(qobjectPtr, '@QObject')
#warn("CALL FUNC: 0x%x" % self.qtPropertyFunc)
cmd = '((QVariant(*)(void*,char*))0x%x)((void*)0x%x,"%s")' \
% (self.qtPropertyFunc, qobjectPtr, name)
try:
#warn('PROP CMD: %s' % cmd)
res = self.parseAndEvaluate(cmd)
#warn('PROP RES: %s' % res)
except:
self.bump('failedMetaObjectCall')
putt(name, ' ')
continue
#warn('COULD NOT EXECUTE: %s' % cmd)
#self.putCallItem(name, '@QVariant', base, 'property', '"' + name + '"')
if res is None:
self.bump('failedMetaObjectCall2')
putt(name, ' ')
continue
self.putSubItem(name, res)
else:
putt(name, ' ')
# Dynamic properties.
if extraData:
byteArrayType = self.createType('QByteArray')
variantType = self.createType('QVariant')
if self.qtVersion() >= 0x50600:
values = self.vectorChildrenGenerator(
extraData + 2 * ptrSize, variantType)
elif self.qtVersion() >= 0x50000:
values = self.listChildrenGenerator(
extraData + 2 * ptrSize, variantType)
else:
values = self.listChildrenGenerator(
extraData + 2 * ptrSize, variantType.pointer())
names = self.listChildrenGenerator(
extraData + ptrSize, byteArrayType)
for (k, v) in zip(names, values):
with SubItem(self, propertyCount + dynamicPropertyCount):
self.putField('key', self.encodeByteArray(k))
self.putField('keyencoded', 'latin1')
self.putItem(v)
dynamicPropertyCount += 1
self.putItemCount(propertyCount + dynamicPropertyCount)
else:
# We need a handle to [x] for the user to expand the item
# before we know whether there are actual children. Counting
# them is too expensive.
self.putSpecialValue('minimumitemcount', propertyCount)
self.putNumChild(1)
superDataPtr = extractSuperDataPtr(metaObjectPtr)
globalOffset = 0
superDataIterator = superDataPtr
while superDataIterator:
sdata = extractDataPtr(superDataIterator)
globalOffset += self.extractInt(sdata + 16) # methodCount member
superDataIterator = extractSuperDataPtr(superDataIterator)
if isQMetaObject or isQObject:
with SubItem(self, '[methods]'):
self.putField('sortgroup', 3)
self.putItemCount(methodCount)
if self.isExpanded():
with Children(self):
for i in range(methodCount):
t = self.split('IIIII', dataPtr + 56 + 20 * i)
name = self.metaString(metaObjectPtr, t[0], revision)
with SubItem(self, i):
self.putValue(name)
self.putType(' ')
self.putNumChild(1)
isSignal = False
flags = t[4]
if flags == 0x06:
typ = 'signal'
isSignal = True
elif flags == 0x0a:
typ = 'slot'
elif flags == 0x0a:
typ = 'invokable'
else:
typ = '<unknown>'
with Children(self):
putt('[nameindex]', t[0])
putt('[type]', typ)
putt('[argc]', t[1])
putt('[parameter]', t[2])
putt('[tag]', t[3])
putt('[flags]', t[4])
putt('[localindex]', str(i))
putt('[globalindex]', str(globalOffset + i))
if isQObject:
with SubItem(self, '[d]'):
self.putItem(self.createValue(dd, '@QObjectPrivate'))
self.putField('sortgroup', 15)
if isQMetaObject:
with SubItem(self, '[superdata]'):
self.putField('sortgroup', 12)
if superDataPtr:
self.putType('@QMetaObject')
self.putAddress(superDataPtr)
self.putNumChild(1)
if self.isExpanded():
with Children(self):
self.putQObjectGutsHelper(0, 0, -1, superDataPtr, 'QMetaObject')
else:
self.putType('@QMetaObject *')
self.putValue('0x0')
self.putNumChild(0)
if handle >= 0:
localIndex = int((handle - methods) / 5)
with SubItem(self, '[localindex]'):
self.putField('sortgroup', 12)
self.putValue(localIndex)
with SubItem(self, '[globalindex]'):
self.putField('sortgroup', 11)
self.putValue(globalOffset + localIndex)
def putQObjectConnections(self, dd):
with SubItem(self, '[connections]'):
ptrSize = self.ptrSize()
self.putNoType()
privateType = self.createType('@QObjectPrivate')
d_ptr = dd.cast(privateType.pointer()).dereference()
connections = d_ptr['connectionLists']
if self.connections.integer() == 0:
self.putItemCount(0)
else:
connections = connections.dereference()
#connections = connections.cast(connections.type.firstBase())
self.putSpecialValue('minimumitemcount', 0)
self.putNumChild(1)
if self.isExpanded():
pp = 0
with Children(self):
innerType = connections.type[0]
# Should check: innerType == ns::QObjectPrivate::ConnectionList
base = self.extractPointer(connections)
data, size, alloc = self.vectorDataHelper(base)
connectionType = self.createType('@QObjectPrivate::Connection')
for i in xrange(size):
first = self.extractPointer(data + i * 2 * ptrSize)
while first:
self.putSubItem('%s' % pp,
self.createPointerValue(first, connectionType))
first = self.extractPointer(first + 3 * ptrSize)
# We need to enforce some upper limit.
pp += 1
if pp > 1000:
break
def currentItemFormat(self, typeName = None):
displayFormat = self.formats.get(self.currentIName, AutomaticFormat)
if displayFormat == AutomaticFormat:
if typeName is None:
typeName = self.currentType.value
needle = None if typeName is None else self.stripForFormat(typeName)
displayFormat = self.typeformats.get(needle, AutomaticFormat)
return displayFormat
def putSubItem(self, component, value): # -> ReportItem
if not isinstance(value, self.Value):
error('WRONG VALUE TYPE IN putSubItem: %s' % type(value))
if not isinstance(value.type, self.Type):
error('WRONG TYPE TYPE IN putSubItem: %s' % type(value.type))
res = None
with SubItem(self, component):
self.putItem(value)
res = self.currentValue
return res # The 'short' display.
def putArrayData(self, base, n, innerType, childNumChild = None, maxNumChild = 10000):
self.checkIntType(base)
self.checkIntType(n)
addrBase = base
innerSize = innerType.size()
self.putNumChild(n)
#warn('ADDRESS: 0x%x INNERSIZE: %s INNERTYPE: %s' % (addrBase, innerSize, innerType))
enc = innerType.simpleEncoding()
if enc:
self.put('childtype="%s",' % innerType.name)
self.put('addrbase="0x%x",' % addrBase)
self.put('addrstep="0x%x",' % innerSize)
self.put('arrayencoding="%s",' % enc)
if n > maxNumChild:
self.put('childrenelided="%s",' % n) # FIXME: Act on that in frontend
n = maxNumChild
self.put('arraydata="')
self.put(self.readMemory(addrBase, n * innerSize))
self.put('",')
else:
with Children(self, n, innerType, childNumChild, maxNumChild,
addrBase=addrBase, addrStep=innerSize):
for i in self.childRange():
self.putSubItem(i, self.createValue(addrBase + i * innerSize, innerType))
def putArrayItem(self, name, addr, n, typeName):
self.checkIntType(addr)
self.checkIntType(n)
with SubItem(self, name):
self.putEmptyValue()
self.putType('%s [%d]' % (typeName, n))
self.putArrayData(addr, n, self.lookupType(typeName))
self.putAddress(addr)
def putPlotDataHelper(self, base, n, innerType, maxNumChild = 1000*1000):
if n > maxNumChild:
self.putField('plotelided', n) # FIXME: Act on that in frontend
n = maxNumChild
if self.currentItemFormat() == ArrayPlotFormat and innerType.isSimpleType():
enc = innerType.simpleEncoding()
if enc:
self.putField('editencoding', enc)
self.putDisplay('plotdata:separate',
self.readMemory(base, n * innerType.size()))
def putPlotData(self, base, n, innerType, maxNumChild = 1000*1000):
self.putPlotDataHelper(base, n, innerType, maxNumChild=maxNumChild)
if self.isExpanded():
self.putArrayData(base, n, innerType, maxNumChild=maxNumChild)
def putSpecialArgv(self, value):
"""
Special handling for char** argv.
"""
n = 0
p = value
# p is 0 for "optimized out" cases. Or contains rubbish.
try:
if value.integer():
while p.dereference().integer() and n <= 100:
p += 1
n += 1
except:
pass
with TopLevelItem(self, 'local.argv'):
self.put('iname="local.argv",name="argv",')
self.putItemCount(n, 100)
self.putType('char **')
if self.currentIName in self.expandedINames:
p = value
with Children(self, n):
for i in xrange(n):
self.putSubItem(i, p.dereference())
p += 1
def extractPointer(self, value):
code = 'I' if self.ptrSize() == 4 else 'Q'
return self.extractSomething(value, code, 8 * self.ptrSize())
def extractInt64(self, value):
return self.extractSomething(value, 'q', 64)
def extractUInt64(self, value):
return self.extractSomething(value, 'Q', 64)
def extractInt(self, value):
return self.extractSomething(value, 'i', 32)
def extractUInt(self, value):
return self.extractSomething(value, 'I', 32)
def extractShort(self, value):
return self.extractSomething(value, 'h', 16)
def extractUShort(self, value):
return self.extractSomething(value, 'H', 16)
def extractByte(self, value):
return self.extractSomething(value, 'b', 8)
def extractSomething(self, value, pattern, bitsize):
if self.isInt(value):
val = self.Value(self)
val.laddress = value
return val.extractSomething(pattern, bitsize)
if isinstance(value, self.Value):
return value.extractSomething(pattern, bitsize)
error('CANT EXTRACT FROM %s' % type(value))
# Parses a..b and a.(s).b
def parseRange(self, exp):
# Search for the first unbalanced delimiter in s
def searchUnbalanced(s, upwards):
paran = 0
bracket = 0
if upwards:
open_p, close_p, open_b, close_b = '(', ')', '[', ']'
else:
open_p, close_p, open_b, close_b = ')', '(', ']', '['
for i in range(len(s)):
c = s[i]
if c == open_p:
paran += 1
elif c == open_b:
bracket += 1
elif c == close_p:
paran -= 1
if paran < 0:
return i
elif c == close_b:
bracket -= 1
if bracket < 0:
return i
return len(s)
match = re.search('(\.)(\(.+?\))?(\.)', exp)
if match:
s = match.group(2)
left_e = match.start(1)
left_s = 1 + left_e - searchUnbalanced(exp[left_e::-1], False)
right_s = match.end(3)
right_e = right_s + searchUnbalanced(exp[right_s:], True)
template = exp[:left_s] + '%s' + exp[right_e:]
a = exp[left_s:left_e]
b = exp[right_s:right_e]
try:
# Allow integral expressions.
ss = self.parseAndEvaluate(s[1:len(s)-1]).integer() if s else 1
aa = self.parseAndEvaluate(a).integer()
bb = self.parseAndEvaluate(b).integer()
if aa < bb and ss > 0:
return True, aa, ss, bb + 1, template
except:
pass
return False, 0, 1, 1, exp
def putNumChild(self, numchild):
if numchild != self.currentChildNumChild:
self.putField('numchild', numchild)
def handleLocals(self, variables):
#warn('VARIABLES: %s' % variables)
self.preping('locals')
shadowed = {}
for value in variables:
if value.name == 'argv':
if value.type.code == TypeCodePointer:
if value.type.ltarget.code == TypeCodePointer:
if value.type.ltarget.ltarget.name == 'char':
self.putSpecialArgv(value)
continue
name = value.name
if name in shadowed:
level = shadowed[name]
shadowed[name] = level + 1
name += '@%d' % level
else:
shadowed[name] = 1
# A 'normal' local variable or parameter.
iname = value.iname if hasattr(value, 'iname') else 'local.' + name
with TopLevelItem(self, iname):
self.preping('all-' + iname)
self.putField('iname', iname)
self.putField('name', name)
self.putItem(value)
self.ping('all-' + iname)
self.ping('locals')
def handleWatches(self, args):
self.preping('watches')
for watcher in args.get('watchers', []):
iname = watcher['iname']
exp = self.hexdecode(watcher['exp'])
self.handleWatch(exp, exp, iname)
self.ping('watches')
def handleWatch(self, origexp, exp, iname):
exp = str(exp).strip()
escapedExp = self.hexencode(exp)
#warn('HANDLING WATCH %s -> %s, INAME: "%s"' % (origexp, exp, iname))
# Grouped items separated by semicolon.
if exp.find(';') >= 0:
exps = exp.split(';')
n = len(exps)
with TopLevelItem(self, iname):
self.putField('iname', iname)
#self.putField('wname', escapedExp)
self.putField('name', exp)
self.putField('exp', exp)
self.putItemCount(n)
self.putNoType()
for i in xrange(n):
self.handleWatch(exps[i], exps[i], '%s.%d' % (iname, i))
return
# Special array index: e.g a[1..199] or a[1.(3).199] for stride 3.
isRange, begin, step, end, template = self.parseRange(exp)
if isRange:
#warn('RANGE: %s %s %s in %s' % (begin, step, end, template))
r = range(begin, end, step)
n = len(r)
with TopLevelItem(self, iname):
self.putField('iname', iname)
#self.putField('wname', escapedExp)
self.putField('name', exp)
self.putField('exp', exp)
self.putItemCount(n)
self.putNoType()
with Children(self, n):
for i in r:
e = template % i
self.handleWatch(e, e, '%s.%s' % (iname, i))
return
# Fall back to less special syntax
#return self.handleWatch(origexp, exp, iname)
with TopLevelItem(self, iname):
self.putField('iname', iname)
self.putField('wname', escapedExp)
try:
value = self.parseAndEvaluate(exp)
self.putItem(value)
except Exception:
self.currentType.value = ' '
self.currentValue.value = '<no such value>'
self.currentChildNumChild = -1
self.currentNumChild = 0
self.putNumChild(0)
def registerDumper(self, funcname, function):
try:
if funcname.startswith('qdump__'):
typename = funcname[7:]
spec = inspect.getargspec(function)
if len(spec.args) == 2:
self.qqDumpers[typename] = function
elif len(spec.args) == 3 and len(spec.defaults) == 1:
self.qqDumpersEx[spec.defaults[0]] = function
self.qqFormats[typename] = self.qqFormats.get(typename, [])
elif funcname.startswith('qform__'):
typename = funcname[7:]
try:
self.qqFormats[typename] = function()
except:
self.qqFormats[typename] = []
elif funcname.startswith('qedit__'):
typename = funcname[7:]
try:
self.qqEditable[typename] = function
except:
pass
except:
pass
def setupDumpers(self, _ = {}):
self.resetCaches()
for mod in self.dumpermodules:
m = __import__(mod)
dic = m.__dict__
for name in dic.keys():
item = dic[name]
self.registerDumper(name, item)
msg = 'dumpers=['
for key, value in self.qqFormats.items():
editable = ',editable="true"' if key in self.qqEditable else ''
formats = (',formats=\"%s\"' % str(value)[1:-1]) if len(value) else ''
msg += '{type="%s"%s%s},' % (key, editable, formats)
msg += '],'
v = 10000 * sys.version_info[0] + 100 * sys.version_info[1] + sys.version_info[2]
msg += 'python="%d"' % v
return msg
def reloadDumpers(self, args):
for mod in self.dumpermodules:
m = sys.modules[mod]
if sys.version_info[0] >= 3:
import importlib
importlib.reload(m)
else:
reload(m)
self.setupDumpers(args)
def loadDumpers(self, args):
msg = self.setupDumpers()
self.reportResult(msg, args)
def addDumperModule(self, args):
path = args['path']
(head, tail) = os.path.split(path)
sys.path.insert(1, head)
self.dumpermodules.append(os.path.splitext(tail)[0])
def extractQStringFromQDataStream(self, buf, offset):
""" Read a QString from the stream """
size = struct.unpack_from('!I', buf, offset)[0]
offset += 4
string = buf[offset:offset + size].decode('utf-16be')
return (string, offset + size)
def extractQByteArrayFromQDataStream(self, buf, offset):
""" Read a QByteArray from the stream """
size = struct.unpack_from('!I', buf, offset)[0]
offset += 4
string = buf[offset:offset + size].decode('latin1')
return (string, offset + size)
def extractIntFromQDataStream(self, buf, offset):
""" Read an int from the stream """
value = struct.unpack_from('!I', buf, offset)[0]
return (value, offset + 4)
def handleInterpreterMessage(self):
""" Return True if inferior stopped """
resdict = self.fetchInterpreterResult()
return resdict.get('event') == 'break'
def reportInterpreterResult(self, resdict, args):
print('interpreterresult=%s,token="%s"'
% (self.resultToMi(resdict), args.get('token', -1)))
def reportInterpreterAsync(self, resdict, asyncclass):
print('interpreterasync=%s,asyncclass="%s"'
% (self.resultToMi(resdict), asyncclass))
def removeInterpreterBreakpoint(self, args):
res = self.sendInterpreterRequest('removebreakpoint', { 'id' : args['id'] })
return res
def insertInterpreterBreakpoint(self, args):
args['condition'] = self.hexdecode(args.get('condition', ''))
# Will fail if the service is not yet up and running.
response = self.sendInterpreterRequest('setbreakpoint', args)
resdict = args.copy()
bp = None if response is None else response.get('breakpoint', None)
if bp:
resdict['number'] = bp
resdict['pending'] = 0
else:
self.createResolvePendingBreakpointsHookBreakpoint(args)
resdict['number'] = -1
resdict['pending'] = 1
resdict['warning'] = 'Direct interpreter breakpoint insertion failed.'
self.reportInterpreterResult(resdict, args)
def resolvePendingInterpreterBreakpoint(self, args):
self.parseAndEvaluate('qt_qmlDebugEnableService("NativeQmlDebugger")')
response = self.sendInterpreterRequest('setbreakpoint', args)
bp = None if response is None else response.get('breakpoint', None)
resdict = args.copy()
if bp:
resdict['number'] = bp
resdict['pending'] = 0
else:
resdict['number'] = -1
resdict['pending'] = 0
resdict['error'] = 'Pending interpreter breakpoint insertion failed.'
self.reportInterpreterAsync(resdict, 'breakpointmodified')
def fetchInterpreterResult(self):
buf = self.parseAndEvaluate('qt_qmlDebugMessageBuffer')
size = self.parseAndEvaluate('qt_qmlDebugMessageLength')
msg = self.hexdecode(self.readMemory(buf, size))
# msg is a sequence of 'servicename<space>msglen<space>msg' items.
resdict = {} # Native payload.
while len(msg):
pos0 = msg.index(' ') # End of service name
pos1 = msg.index(' ', pos0 + 1) # End of message length
service = msg[0:pos0]
msglen = int(msg[pos0+1:pos1])
msgend = pos1+1+msglen
payload = msg[pos1+1:msgend]
msg = msg[msgend:]
if service == 'NativeQmlDebugger':
try:
resdict = json.loads(payload)
continue
except:
warn('Cannot parse native payload: %s' % payload)
else:
print('interpreteralien=%s'
% {'service': service, 'payload': self.hexencode(payload)})
try:
expr = 'qt_qmlDebugClearBuffer()'
res = self.parseAndEvaluate(expr)
except RuntimeError as error:
warn('Cleaning buffer failed: %s: %s' % (expr, error))
return resdict
def sendInterpreterRequest(self, command, args = {}):
encoded = json.dumps({ 'command': command, 'arguments': args })
hexdata = self.hexencode(encoded)
expr = 'qt_qmlDebugSendDataToService("NativeQmlDebugger","%s")' % hexdata
try:
res = self.parseAndEvaluate(expr)
except RuntimeError as error:
warn('Interpreter command failed: %s: %s' % (encoded, error))
return {}
except AttributeError as error:
# Happens with LLDB and 'None' current thread.
warn('Interpreter command failed: %s: %s' % (encoded, error))
return {}
if not res:
warn('Interpreter command failed: %s ' % encoded)
return {}
return self.fetchInterpreterResult()
def executeStep(self, args):
if self.nativeMixed:
response = self.sendInterpreterRequest('stepin', args)
self.doContinue()
def executeStepOut(self, args):
if self.nativeMixed:
response = self.sendInterpreterRequest('stepout', args)
self.doContinue()
def executeNext(self, args):
if self.nativeMixed:
response = self.sendInterpreterRequest('stepover', args)
self.doContinue()
def executeContinue(self, args):
if self.nativeMixed:
response = self.sendInterpreterRequest('continue', args)
self.doContinue()
def doInsertInterpreterBreakpoint(self, args, wasPending):
#warn('DO INSERT INTERPRETER BREAKPOINT, WAS PENDING: %s' % wasPending)
# Will fail if the service is not yet up and running.
response = self.sendInterpreterRequest('setbreakpoint', args)
bp = None if response is None else response.get('breakpoint', None)
if wasPending:
if not bp:
self.reportInterpreterResult({'bpnr': -1, 'pending': 1,
'error': 'Pending interpreter breakpoint insertion failed.'}, args)
return
else:
if not bp:
self.reportInterpreterResult({'bpnr': -1, 'pending': 1,
'warning': 'Direct interpreter breakpoint insertion failed.'}, args)
self.createResolvePendingBreakpointsHookBreakpoint(args)
return
self.reportInterpreterResult({'bpnr': bp, 'pending': 0}, args)
def isInternalInterpreterFrame(self, functionName):
if functionName is None:
return False
if functionName.startswith('qt_v4'):
return True
return functionName.startswith(self.qtNamespace() + 'QV4::')
# Hack to avoid QDate* dumper timeouts with GDB 7.4 on 32 bit
# due to misaligned %ebx in SSE calls (qstring.cpp:findChar)
def canCallLocale(self):
return True
def isReportableInterpreterFrame(self, functionName):
return functionName and functionName.find('QV4::Moth::VME::exec') >= 0
def extractInterpreterStack(self):
return self.sendInterpreterRequest('backtrace', {'limit': 10 })
def isInt(self, thing):
if isinstance(thing, int):
return True
if sys.version_info[0] == 2:
if isinstance(thing, long):
return True
return False
def putItems(self, count, generator, maxNumChild=10000):
self.putItemCount(count)
if self.isExpanded():
with Children(self, count, maxNumChild=maxNumChild):
for i, val in zip(self.childRange(), generator):
self.putSubItem(i, val)
def putItem(self, value):
self.preping('putItem')
self.putItemX(value)
self.ping('putItem')
def putItemX(self, value):
#warn('PUT ITEM: %s' % value.stringify())
typeobj = value.type #unqualified()
typeName = typeobj.name
self.addToCache(typeobj) # Fill type cache
if not value.lIsInScope:
self.putSpecialValue('optimizedout')
#self.putType(typeobj)
#self.putSpecialValue('outofscope')
self.putNumChild(0)
return
if not isinstance(value, self.Value):
error('WRONG TYPE IN putItem: %s' % type(self.Value))
# Try on possibly typedefed type first.
if self.tryPutPrettyItem(typeName, value):
if typeobj.code == TypeCodePointer:
self.putOriginalAddress(value.address())
else:
self.putAddress(value.address())
return
if typeobj.code == TypeCodeTypedef:
#warn('TYPEDEF VALUE: %s' % value.stringify())
self.putItem(value.detypedef())
self.putBetterType(typeName)
return
if typeobj.code == TypeCodePointer:
self.putFormattedPointer(value)
return
self.putAddress(value.address())
if typeobj.code == TypeCodeFunction:
#warn('FUNCTION VALUE: %s' % value)
self.putType(typeobj)
self.putSymbolValue(value.pointer())
self.putNumChild(0)
return
if typeobj.code == TypeCodeEnum:
#warn('ENUM VALUE: %s' % value.stringify())
self.putType(typeobj.name)
self.putValue(value.display())
self.putNumChild(0)
return
if typeobj.code == TypeCodeArray:
#warn('ARRAY VALUE: %s' % value)
self.putCStyleArray(value)
return
if typeobj.code == TypeCodeBitfield:
#warn('BITFIELD VALUE: %s %d %s' % (value.name, value.lvalue, typeName))
self.putNumChild(0)
if typeobj.ltarget and typeobj.ltarget.code == TypeCodeEnum:
self.putValue(typeobj.ltarget.typeData().enumDisplay(value.lvalue, value.laddress))
else:
self.putValue(value.lvalue)
self.putType(typeName)
return
if typeobj.code == TypeCodeIntegral:
#warn('INTEGER: %s %s' % (value.name, value))
val = value.value()
self.putNumChild(0)
self.putValue(val)
self.putType(typeName)
return
if typeobj.code == TypeCodeFloat:
#warn('FLOAT VALUE: %s' % value)
self.putValue(value.value())
self.putNumChild(0)
self.putType(typeobj.name)
return
if typeobj.code == TypeCodeReference:
#warn('REFERENCE VALUE: %s' % value)
val = value.dereference()
self.putItem(val)
self.putBetterType(typeName)
return
if typeobj.code == TypeCodeComplex:
self.putType(typeobj)
self.putValue(value.display())
self.putNumChild(0)
return
if typeobj.code == TypeCodeFortranString:
data = self.value.data()
self.putValue(data, 'latin1', 1)
self.putType(typeobj)
if typeName.endswith('[]'):
# D arrays, gdc compiled.
n = value['length']
base = value['ptr']
self.putType(typeName)
self.putItemCount(n)
if self.isExpanded():
self.putArrayData(base.pointer(), n, base.type.target())
return
#warn('SOME VALUE: %s' % value)
#warn('HAS CHILDREN VALUE: %s' % value.hasChildren())
#warn('GENERIC STRUCT: %s' % typeobj)
#warn('INAME: %s ' % self.currentIName)
#warn('INAMES: %s ' % self.expandedINames)
#warn('EXPANDED: %s ' % (self.currentIName in self.expandedINames))
self.putType(typeName)
self.putNumChild(1)
self.putEmptyValue()
#warn('STRUCT GUTS: %s ADDRESS: 0x%x ' % (value.name, value.address()))
if self.showQObjectNames:
self.preping(self.currentIName)
self.putQObjectNameValue(value)
self.ping(self.currentIName)
if self.isExpanded():
self.putField('sortable', 1)
with Children(self, 1, childType=None):
self.putFields(value)
if self.showQObjectNames:
self.tryPutQObjectGuts(value)
def symbolAddress(self, symbolName):
res = self.parseAndEvaluate('(size_t)&' + symbolName)
return None if res is None else res.pointer()
def qtHookDataSymbolName(self):
return 'qtHookData'
def qtTypeInfoVersion(self):
addr = self.symbolAddress(self.qtHookDataSymbolName())
if addr:
# Only available with Qt 5.3+
(hookVersion, x, x, x, x, x, tiVersion) = self.split('ppppppp', addr)
#warn('HOOK: %s TI: %s' % (hookVersion, tiVersion))
if hookVersion >= 3:
self.qtTypeInfoVersion = lambda: tiVersion
return tiVersion
return None
def qtDeclarativeHookDataSymbolName(self):
return 'qtDeclarativeHookData'
def qtDeclarativeTypeInfoVersion(self):
addr = self.symbolAddress(self.qtDeclarativeHookDataSymbolName())
if addr:
# Only available with Qt 5.6+
(hookVersion, x, tiVersion) = self.split('ppp', addr)
if hookVersion >= 1:
self.qtTypeInfoVersion = lambda: tiVersion
return tiVersion
return None
def addToCache(self, typeobj):
typename = typeobj.name
if typename in self.typesReported:
return
self.typesReported[typename] = True
self.typesToReport[typename] = typeobj
class Value:
def __init__(self, dumper):
self.dumper = dumper
self.name = None
self.type = None
self.ldata = None # Target address in case of references and pointers.
self.laddress = None # Own address.
self.lIsInScope = True
self.ldisplay = None
self.lbitpos = None
self.lbitsize = None
self.targetValue = None # For references.
self.isBaseClass = None
self.nativeValue = None
def copy(self):
val = self.dumper.Value(self.dumper)
val.dumper = self.dumper
val.name = self.name
val.type = self.type
val.ldata = self.ldata
val.laddress = self.laddress
val.lIsInScope = self.lIsInScope
val.ldisplay = self.ldisplay
val.lbitpos = self.lbitpos
val.lbitsize = self.lbitsize
val.targetValue = self.targetValue
val.nativeValue = self.nativeValue
return val
def check(self):
if self.laddress is not None and not self.dumper.isInt(self.laddress):
error('INCONSISTENT ADDRESS: %s' % type(self.laddress))
if self.type is not None and not isinstance(self.type, self.dumper.Type):
error('INCONSISTENT TYPE: %s' % type(self.type))
def __str__(self):
#error('Not implemented')
return self.stringify()
def __int__(self):
return self.integer()
def stringify(self):
addr = 'None' if self.laddress is None else ('0x%x' % self.laddress)
return "Value(name='%s',type=%s,bsize=%s,bpos=%s,data=%s,address=%s)" \
% (self.name, self.type.name, self.lbitsize, self.lbitpos,
self.dumper.hexencode(self.ldata), addr)
def display(self):
if self.type.code == TypeCodeEnum:
intval = self.integer()
return self.type.typeData().enumDisplay(intval, self.laddress)
simple = self.value()
if simple is not None:
return str(simple)
if self.ldisplay is not None:
return self.ldisplay
#if self.ldata is not None:
# if sys.version_info[0] == 2 and isinstance(self.ldata, buffer):
# return bytes(self.ldata).encode('hex')
# return self.ldata.encode('hex')
if self.laddress is not None:
return 'value of type %s at address 0x%x' % (self.type.name, self.laddress)
return '<unknown data>'
def pointer(self):
if self.type.code == TypeCodeTypedef:
return self.detypedef().pointer()
return self.extractInteger(self.dumper.ptrSize() * 8, True)
def integer(self):
if self.type.code == TypeCodeTypedef:
return self.detypedef().integer()
elif self.type.code == TypeCodeBitfield:
return self.lvalue
unsigned = self.type.name.startswith('unsigned')
bitsize = self.type.bitsize()
return self.extractInteger(bitsize, unsigned)
def floatingPoint(self):
if self.nativeValue is not None and not self.dumper.isCdb:
return str(self.nativeValue)
if self.type.code == TypeCodeTypedef:
return self.detypedef().floatingPoint()
if self.type.size() == 8:
return self.extractSomething('d', 64)
if self.type.size() == 4:
return self.extractSomething('f', 32)
# Fall back in case we don't have a nativeValue at hand.
# FIXME: This assumes Intel's 80bit extended floats. Which might
# be wrong.
l, h = self.split('QQ')
if True: # 80 bit floats
sign = (h >> 15) & 1
exp = (h & 0x7fff)
fraction = l
bit63 = (l >> 63) & 1
#warn("SIGN: %s EXP: %s H: 0x%x L: 0x%x" % (sign, exp, h, l))
if exp == 0:
if bit63 == 0:
if l == 0:
res = '-0' if sign else '0'
else:
res = (-1)**sign * l * 2**(-16382) # subnormal
else:
res = 'pseudodenormal'
elif exp == 0x7fff:
res = 'special'
else:
res = (-1)**sign * l * 2**(exp - 16383 - 63)
else: # 128 bits
sign = h >> 63
exp = (h >> 48) & 0x7fff
fraction = h & (2**48 - 1)
#warn("SIGN: %s EXP: %s FRAC: %s H: 0x%x L: 0x%x" % (sign, exp, fraction, h, l))
if exp == 0:
if fraction == 0:
res = -0.0 if sign else 0.0
else:
res = (-1)**sign * fraction / 2**48 * 2**(-62) # subnormal
elif exp == 0x7fff:
res = ('-inf' if sign else 'inf') if fraction == 0 else 'nan'
else:
res = (-1)**sign * (1 + fraction / 2**48) * 2**(exp - 63)
return res
def value(self):
if self.type is not None:
if self.type.code == TypeCodeTypedef:
return self.detypedef().value()
if self.type.code == TypeCodeIntegral:
return self.integer()
if self.type.code == TypeCodeBitfield:
return self.integer()
if self.type.code == TypeCodeFloat:
return self.floatingPoint()
if self.type.code == TypeCodeTypedef:
return self.cast(self.type.ltarget).value()
if self.type.code == TypeCodePointer:
return self.pointer()
return None
def extractPointer(self):
return self.split('p')[0]
def findMemberByName(self, name):
self.check()
if self.type.code == TypeCodeTypedef:
return self.findMemberByName(self.detypedef())
if self.type.code in (TypeCodePointer, TypeCodeReference):
res = self.dereference().findMemberByName(name)
if res is not None:
return res
if self.type.code == TypeCodeStruct:
#warn('SEARCHING FOR MEMBER: %s IN %s' % (name, self.type.name))
members = self.members(True)
#warn('MEMBERS: %s' % members)
for member in members:
#warn('CHECKING FIELD %s' % member.name)
if member.type.code == TypeCodeTypedef:
member = member.detypedef()
if member.name == name:
return member
for member in members:
if member.type.code == TypeCodeTypedef:
member = member.detypedef()
if member.name == name: # Could be base class.
return member
if member.type.code == TypeCodeStruct:
res = member.findMemberByName(name)
if res is not None:
return res
return None
def __getitem__(self, index):
#warn('GET ITEM %s %s' % (self, index))
self.check()
if self.type.code == TypeCodeTypedef:
#warn('GET ITEM STRIP TYPEDEFS TO %s' % self.type.ltarget)
return self.cast(self.type.ltarget).__getitem__(index)
if isinstance(index, str):
if self.type.code == TypeCodePointer:
#warn('GET ITEM %s DEREFERENCE TO %s' % (self, self.dereference()))
return self.dereference().__getitem__(index)
res = self.findMemberByName(index)
if res is None:
raise RuntimeError('No member named %s in type %s'
% (index, self.type.name))
return res
elif isinstance(index, self.dumper.Field):
field = index
elif self.dumper.isInt(index):
if self.type.code == TypeCodeArray:
addr = self.laddress + int(index) * self.type.ltarget.size()
return self.dumper.createValue(addr, self.type.ltarget)
if self.type.code == TypeCodePointer:
addr = self.pointer() + int(index) * self.type.ltarget.size()
return self.dumper.createValue(addr, self.type.ltarget)
return self.members(False)[index]
else:
error('BAD INDEX TYPE %s' % type(index))
field.check()
#warn('EXTRACT FIELD: %s, BASE 0x%x' % (field, self.address()))
if self.type.code == TypeCodePointer:
#warn('IS TYPEDEFED POINTER!')
res = self.dereference()
#warn('WAS POINTER: %s' % res)
return field.extract(self)
def extractField(self, field):
if not isinstance(field, self.dumper.Field):
error('BAD INDEX TYPE %s' % type(field))
if field.extractor is not None:
val = field.extractor(self)
if val is not None:
#warn('EXTRACTOR SUCCEEDED: %s ' % val)
return val
if self.type.code == TypeCodeTypedef:
return self.cast(self.type.ltarget).extractField(field)
if self.type.code == TypeCodeReference:
return self.dereference().extractField(field)
#warn('FIELD: %s ' % field)
val = self.dumper.Value(self.dumper)
val.name = field.name
val.isBaseClass = field.isBase
val.type = field.fieldType()
if field.isArtificial:
if self.laddress is not None:
val.laddress = self.laddress
if self.ldata is not None:
val.ldata = self.ldata
return val
fieldBitsize = field.bitsize
fieldSize = (fieldBitsize + 7) // 8
fieldBitpos = field.bitpos
fieldOffset = fieldBitpos // 8
fieldType = field.fieldType()
if fieldType.code == TypeCodeBitfield:
fieldBitpos -= fieldOffset * 8
ldata = self.data()
data = 0
for i in range(fieldSize):
data = data << 8
if self.dumper.isBigEndian:
byte = ldata[i]
else:
byte = ldata[fieldOffset + fieldSize - 1 - i]
data += ord(byte)
data = data >> fieldBitpos
data = data & ((1 << fieldBitsize) - 1)
val.lvalue = data
val.laddress = None
return val
if self.laddress is not None:
val.laddress = self.laddress + fieldOffset
elif self.ldata is not None:
val.ldata = self.ldata[fieldOffset:fieldOffset + fieldSize]
else:
self.dumper.check(False)
if fieldType.code == TypeCodeReference:
if val.laddress is not None:
val = self.dumper.createReferenceValue(val.laddress, fieldType.ltarget)
val.name = field.name
#warn('GOT VAL %s FOR FIELD %s' % (val, field))
val.lbitsize = fieldBitsize
val.check()
return val
# This is the generic version for synthetic values.
# The native backends replace it in their fromNativeValue()
# implementations.
def members(self, includeBases):
#warn("LISTING MEMBERS OF %s" % self)
if self.type.code == TypeCodeTypedef:
return self.detypedef().members(includeBases)
tdata = self.type.typeData()
#if isinstance(tdata.lfields, list):
# return tdata.lfields
fields = []
if tdata.lfields is not None:
if isinstance(tdata.lfields, list):
fields = tdata.lfields
else:
fields = list(tdata.lfields(self))
#warn("FIELDS: %s" % fields)
res = []
for field in fields:
if isinstance(field, self.dumper.Value):
#warn("USING VALUE DIRECTLY %s" % field.name)
res.append(field)
continue
if field.isBase and not includeBases:
#warn("DROPPING BASE %s" % field.name)
continue
res.append(self.extractField(field))
#warn("GOT MEMBERS: %s" % res)
return res
def __add__(self, other):
self.check()
if self.dumper.isInt(other):
stripped = self.type.stripTypedefs()
if stripped.code == TypeCodePointer:
address = self.pointer() + stripped.dereference().size() * other
val = self.dumper.Value(self.dumper)
val.laddress = None
val.ldata = bytes(struct.pack(self.dumper.packCode + 'Q', address))
val.type = self.type
return val
error('BAD DATA TO ADD TO: %s %s' % (self.type, other))
def __sub__(self, other):
self.check()
if self.type.name == other.type.name:
stripped = self.type.stripTypedefs()
if stripped.code == TypeCodePointer:
return (self.pointer() - other.pointer()) // stripped.dereference().size()
error('BAD DATA TO SUB TO: %s %s' % (self.type, other))
def dereference(self):
self.check()
if self.type.code == TypeCodeTypedef:
return self.detypedef().dereference()
val = self.dumper.Value(self.dumper)
if self.type.code == TypeCodeReference:
if self.nativeValue is None:
val.laddress = self.pointer()
if val.laddress is None and self.laddress is not None:
val.laddress = self.laddress
val.type = self.dumper.nativeDynamicType(val.laddress, self.type.dereference())
else:
val = self.dumper.nativeValueDereferenceReference(self)
elif self.type.code == TypeCodePointer:
if self.nativeValue is None:
val.laddress = self.pointer()
val.type = self.dumper.nativeDynamicType(val.laddress, self.type.dereference())
else:
val = self.dumper.nativeValueDereferencePointer(self)
else:
error("WRONG: %s" % self.type.code)
#warn("DEREFERENCING FROM: %s" % self)
#warn("DEREFERENCING TO: %s" % val)
#dynTypeName = val.type.dynamicTypeName(val.laddress)
#if dynTypeName is not None:
# val.type = self.dumper.createType(dynTypeName)
return val
def detypedef(self):
self.check()
if self.type.code != TypeCodeTypedef:
error("WRONG")
val = self.copy()
val.type = self.type.ltarget
#warn("DETYPEDEF FROM: %s" % self)
#warn("DETYPEDEF TO: %s" % val)
return val
def extend(self, size):
if self.type.size() < size:
val = self.dumper.Value(self.dumper)
val.laddress = None
val.ldata = self.zeroExtend(self.ldata)
return val
if self.type.size() == size:
return self
error('NOT IMPLEMENTED')
def zeroExtend(self, data, size):
ext = '\0' * (size - len(data))
if sys.version_info[0] == 3:
pad = bytes(ext, encoding='latin1')
else:
pad = bytes(ext)
return pad + data if self.dumper.isBigEndian else data + pad
def cast(self, typish):
self.check()
val = self.dumper.Value(self.dumper)
val.laddress = self.laddress
val.lbitsize = self.lbitsize
val.ldata = self.ldata
val.type = self.dumper.createType(typish)
return val
def address(self):
self.check()
return self.laddress
def data(self, size = None):
self.check()
if self.ldata is not None:
if len(self.ldata) > 0:
if size is None:
return self.ldata
if size == len(self.ldata):
return self.ldata
if size < len(self.ldata):
return self.ldata[:size]
#error('ZERO-EXTENDING DATA TO %s BYTES: %s' % (size, self))
return self.zeroExtend(self.ldata, size)
if self.laddress is not None:
if size is None:
size = self.type.size()
res = self.dumper.readRawMemory(self.laddress, size)
if len(res) > 0:
return res
error('CANNOT CONVERT ADDRESS TO BYTES: %s' % self)
error('CANNOT CONVERT TO BYTES: %s' % self)
def extractInteger(self, bitsize, unsigned):
self.dumper.preping('extractInt')
self.check()
if bitsize > 32:
size = 8
code = 'Q' if unsigned else 'q'
elif bitsize > 16:
size = 4
code = 'I' if unsigned else 'i'
elif bitsize > 8:
size = 2
code = 'H' if unsigned else 'h'
else:
size = 1
code = 'B' if unsigned else 'b'
rawBytes = self.data(size)
res = struct.unpack_from(self.dumper.packCode + code, rawBytes, 0)[0]
#warn('Extract: Code: %s Bytes: %s Bitsize: %s Size: %s'
# % (self.dumper.packCode + code, self.dumper.hexencode(rawBytes), bitsize, size))
self.dumper.ping('extractInt')
return res
def extractSomething(self, code, bitsize):
self.dumper.preping('extractSomething')
self.check()
size = (bitsize + 7) >> 3
rawBytes = self.data(size)
res = struct.unpack_from(self.dumper.packCode + code, rawBytes, 0)[0]
self.dumper.ping('extractSomething')
return res
def to(self, pattern):
return self.split(pattern)[0]
def split(self, pattern):
self.dumper.preping('split')
#warn('EXTRACT STRUCT FROM: %s' % self.type)
(pp, size, fields) = self.dumper.describeStruct(pattern)
#warn('SIZE: %s ' % size)
result = struct.unpack_from(self.dumper.packCode + pp, self.data(size))
def structFixer(field, thing):
#warn('STRUCT MEMBER: %s' % type(thing))
if field.isStruct:
#if field.type != field.fieldType():
# error('DO NOT SIMPLIFY')
#warn('FIELD POS: %s' % field.type.stringify())
#warn('FIELD TYE: %s' % field.fieldType().stringify())
res = self.dumper.createValue(thing, field.fieldType())
#warn('RES TYPE: %s' % res.type)
if self.laddress is not None:
res.laddress = self.laddress + field.offset()
return res
return thing
if len(fields) != len(result):
error('STRUCT ERROR: %s %s' (fields, result))
self.dumper.ping('split')
return tuple(map(structFixer, fields, result))
def checkPointer(self, p, align = 1):
ptr = p if self.isInt(p) else p.pointer()
self.readRawMemory(ptr, 1)
def type(self, typeId):
return self.typeData.get(typeId)
def registerType(self, typeId, tdata):
#warn('REGISTER TYPE: %s' % typeId)
self.typeData[typeId] = tdata
#typeId = typeId.replace(' ', '')
#self.typeData[typeId] = tdata
#warn('REGISTERED: %s' % self.typeData)
def registerTypeAlias(self, existingTypeId, aliasId):
#warn('REGISTER ALIAS %s FOR %s' % (aliasId, existingTypeId))
self.typeData[aliasId] = self.typeData[existingTypeId]
class TypeData:
def __init__(self, dumper):
self.dumper = dumper
self.lfields = None # None or Value -> list of member Values
self.lalignment = None # Function returning alignment of this struct
self.lbitsize = None
self.ltarget = None # Inner type for arrays
self.templateArguments = []
self.code = None
self.name = None
self.typeId = None
self.enumDisplay = str
self.moduleName = None
def copy(self):
tdata = self.dumper.TypeData(self.dumper)
tdata.dumper = self.dumper
tdata.lfields = self.lfields
tdata.lalignment = self.lalignment
tdata.lbitsize = self.lbitsize
tdata.ltarget = self.ltarget
tdata.templateArguments = self.templateArguments
tdata.code = self.code
tdata.name = self.name
tdata.typeId = self.typeId
tdata.enumDisplay = self.enumDisplay
tdata.moduleName = self.moduleName
return tdata
class Type:
def __init__(self, dumper, typeId):
self.typeId = typeId
self.dumper = dumper
def __str__(self):
#return self.typeId
return self.stringify()
def typeData(self):
tdata = self.dumper.typeData.get(self.typeId, None)
if tdata is not None:
#warn('USING : %s' % self.typeId)
return tdata
typeId = self.typeId.replace(' ', '')
if tdata is not None:
#warn('USING FALLBACK : %s' % self.typeId)
return tdata
#warn('EXPANDING LAZILY: %s' % self.typeId)
self.dumper.lookupType(self.typeId)
return self.dumper.typeData.get(self.typeId)
@property
def name(self):
tdata = self.dumper.typeData.get(self.typeId)
if tdata is None:
return self.typeId
return tdata.name
@property
def code(self):
return self.typeData().code
@property
def lbitsize(self):
return self.typeData().lbitsize
@property
def lbitpos(self):
return self.typeData().lbitpos
@property
def ltarget(self):
return self.typeData().ltarget
@property
def moduleName(self):
return self.typeData().moduleName
def stringify(self):
tdata = self.typeData()
if tdata is None:
return 'Type(id="%s")' % self.typeId
return 'Type(name="%s",bsize=%s,code=%s)' \
% (tdata.name, tdata.lbitsize, tdata.code)
def __getitem__(self, index):
if self.dumper.isInt(index):
return self.templateArgument(index)
error('CANNOT INDEX TYPE')
def dynamicTypeName(self, address):
tdata = self.typeData()
if tdata is None:
return None
if tdata.code != TypeCodeStruct:
return None
try:
vtbl = self.dumper.extractPointer(address)
except:
return None
#warn('VTBL: 0x%x' % vtbl)
if not self.dumper.couldBePointer(vtbl):
return None
return self.dumper.nativeDynamicTypeName(address, self)
def dynamicType(self, address):
# FIXME: That buys some performance at the cost of a fail
# of Gdb13393 dumper test.
#return self
self.dumper.preping('dynamicType %s 0x%s' % (self.name, address))
dynTypeName = self.dynamicTypeName(address)
self.dumper.ping('dynamicType %s 0x%s' % (self.name, address))
if dynTypeName is not None:
return self.dumper.createType(dynTypeName)
return self
def check(self):
tdata = self.typeData()
if tdata is None:
error('TYPE WITHOUT DATA: %s ALL: %s' % (self.typeId, self.dumper.typeData.keys()))
if tdata.name is None:
error('TYPE WITHOUT NAME: %s' % self.typeId)
def dereference(self):
if self.code == TypeCodeTypedef:
return self.ltarget.dereference()
self.check()
return self.ltarget
def unqualified(self):
return self
def templateArguments(self):
tdata = self.typeData()
if tdata is None:
return self.dumper.listTemplateParameters(self.typeId)
return tdata.templateArguments
def templateArgument(self, position):
tdata = self.typeData()
#warn('TDATA: %s' % tdata)
#warn('ID: %s' % self.typeId)
if tdata is None:
# Native lookups didn't help. Happens for 'wrong' placement of 'const'
# etc. with LLDB. But not all is lost:
ta = self.dumper.listTemplateParameters(self.typeId)
#warn('MANUAL: %s' % ta)
res = ta[position]
#warn('RES: %s' % res.typeId)
return res
#warn('TA: %s %s' % (position, self.typeId))
#warn('ARGS: %s' % tdata.templateArguments)
return tdata.templateArguments[position]
def simpleEncoding(self):
res = {
'bool' : 'int:1',
'char' : 'int:1',
'signed char' : 'int:1',
'unsigned char' : 'uint:1',
'short' : 'int:2',
'unsigned short' : 'uint:2',
'int' : 'int:4',
'unsigned int' : 'uint:4',
'long long' : 'int:8',
'unsigned long long' : 'uint:8',
'float': 'float:4',
'double': 'float:8'
}.get(self.name, None)
return res
def isSimpleType(self):
return self.code in (TypeCodeIntegral, TypeCodeFloat, TypeCodeEnum)
def alignment(self):
tdata = self.typeData()
if tdata.code == TypeCodeTypedef:
return tdata.ltarget.alignment()
if tdata.code in (TypeCodeIntegral, TypeCodeFloat, TypeCodeEnum):
if tdata.name in ('double', 'long long', 'unsigned long long'):
# Crude approximation.
return 8 if self.dumper.isWindowsTarget() else self.dumper.ptrSize()
return self.size()
if tdata.code in (TypeCodePointer, TypeCodeReference):
return self.dumper.ptrSize()
if tdata.lalignment is not None:
#if isinstance(tdata.lalignment, function): # Does not work that way.
if hasattr(tdata.lalignment, '__call__'):
return tdata.lalignment()
return tdata.lalignment
return 1
def pointer(self):
return self.dumper.createPointerType(self)
def splitArrayType(self):
# -> (inner type, count)
if not self.code == TypeCodeArray:
error('Not an array')
s = self.name
pos1 = s.rfind('[')
pos2 = s.find(']', pos1)
itemCount = s[pos1+1:pos2]
return (self.dumper.createType(s[0:pos1].strip()), int(s[pos1+1:pos2]))
def target(self):
return self.typeData().ltarget
def stripTypedefs(self):
if isinstance(self, self.dumper.Type) and self.code != TypeCodeTypedef:
#warn('NO TYPEDEF: %s' % self)
return self
return self.ltarget
def size(self):
bs = self.bitsize()
if bs % 8 != 0:
warn('ODD SIZE: %s' % self)
return (7 + bs) >> 3
def bitsize(self):
if self.lbitsize is not None:
return self.lbitsize
if self.code == TypeCodeArray:
(innerType, itemCount) = self.splitArrayType()
return itemCount * innerType.bitsize()
error('DONT KNOW SIZE: %s' % self)
def isMovableType(self):
if self.code in (TypeCodePointer, TypeCodeIntegral, TypeCodeFloat):
return True
strippedName = self.dumper.stripNamespaceFromType(self.name)
if strippedName in (
'QBrush', 'QBitArray', 'QByteArray', 'QCustomTypeInfo',
'QChar', 'QDate', 'QDateTime', 'QFileInfo', 'QFixed',
'QFixedPoint', 'QFixedSize', 'QHashDummyValue', 'QIcon',
'QImage', 'QLine', 'QLineF', 'QLatin1Char', 'QLocale',
'QMatrix', 'QModelIndex', 'QPoint', 'QPointF', 'QPen',
'QPersistentModelIndex', 'QResourceRoot', 'QRect', 'QRectF',
'QRegExp', 'QSize', 'QSizeF', 'QString', 'QTime', 'QTextBlock',
'QUrl', 'QVariant',
'QXmlStreamAttribute', 'QXmlStreamNamespaceDeclaration',
'QXmlStreamNotationDeclaration', 'QXmlStreamEntityDeclaration'
):
return True
return strippedName == 'QStringList' and self.dumper.qtVersion() >= 0x050000
class Field(collections.namedtuple('Field',
['dumper', 'name', 'type', 'bitsize', 'bitpos',
'extractor', 'isBase', 'isStruct', 'isArtificial' ])):
def __new__(cls, dumper, name=None, type=None, bitsize=None, bitpos=None,
extractor=None, isBase=False, isStruct=False, isArtificial=False):
return super(DumperBase.Field, cls).__new__(
cls, dumper, name, type, bitsize, bitpos,
extractor, isBase, isStruct, isArtificial)
__slots__ = ()
def __str__(self):
return self.stringify()
def stringify(self):
#return 'Field(name="%s")' % self.name
typename = None if self.type is None else self.type.stringify()
return 'Field(name="%s",type=%s,bitpos=%s,bitsize=%s)' \
% (self.name, typename, self.bitpos, self.bitsize)
def check(self):
pass
def size(self):
return self.bitsize() // 8
def offset(self):
return self.bitpos // 8
def fieldType(self):
if self.type is not None:
return self.type
error('CANT GET FIELD TYPE FOR %s' % self)
return None
def ptrCode(self):
return 'I' if self.ptrSize() == 4 else 'Q'
def toPointerData(self, address):
if not self.isInt(address):
error('wrong')
return bytes(struct.pack(self.packCode + self.ptrCode(), address))
def createPointerValue(self, targetAddress, targetTypish):
if not isinstance(targetTypish, self.Type) and not isinstance(targetTypish, str):
error('Expected type in createPointerValue(), got %s'
% type(targetTypish))
if not self.isInt(targetAddress):
error('Expected integral address value in createPointerValue(), got %s'
% type(targetTypish))
val = self.Value(self)
val.ldata = self.toPointerData(targetAddress)
targetType = self.createType(targetTypish).dynamicType(targetAddress)
val.type = self.createPointerType(targetType)
return val
def createReferenceValue(self, targetAddress, targetType):
if not isinstance(targetType, self.Type):
error('Expected type in createReferenceValue(), got %s'
% type(targetType))
if not self.isInt(targetAddress):
error('Expected integral address value in createReferenceValue(), got %s'
% type(targetType))
val = self.Value(self)
val.ldata = self.toPointerData(targetAddress)
targetType = targetType.dynamicType(targetAddress)
val.type = self.createReferenceType(targetType)
return val
def createPointerType(self, targetType):
if not isinstance(targetType, self.Type):
error('Expected type in createPointerType(), got %s'
% type(targetType))
typeId = targetType.typeId + ' *'
tdata = self.TypeData(self)
tdata.name = targetType.name + '*'
tdata.typeId = typeId
tdata.lbitsize = 8 * self.ptrSize()
tdata.code = TypeCodePointer
tdata.ltarget = targetType
self.registerType(typeId, tdata)
return self.Type(self, typeId)
def createReferenceType(self, targetType):
if not isinstance(targetType, self.Type):
error('Expected type in createReferenceType(), got %s'
% type(targetType))
typeId = targetType.typeId + ' &'
tdata = self.TypeData(self)
tdata.name = targetType.name + ' &'
tdata.typeId = typeId
tdata.code = TypeCodeReference
tdata.ltarget = targetType
tdata.lbitsize = 8 * self.ptrSize() # Needed for Gdb13393 test.
#tdata.lbitsize = None
self.registerType(typeId, tdata)
return self.Type(self, typeId)
def createArrayType(self, targetType, count):
if not isinstance(targetType, self.Type):
error('Expected type in createArrayType(), got %s'
% type(targetType))
targetTypeId = targetType.typeId
typeId = '%s[%d]' % (targetTypeId, count)
tdata = self.TypeData(self)
tdata.name = '%s[%d]' % (targetType.name, count)
tdata.typeId = typeId
tdata.code = TypeCodeArray
tdata.ltarget = targetType
self.registerType(typeId, tdata)
return self.Type(self, typeId)
def createBitfieldType(self, targetType, bitsize):
if not isinstance(targetType, self.Type):
error('Expected type in createBitfieldType(), got %s'
% type(targetType))
typeId = '%s:%d' % (targetType.typeId, bitsize)
tdata = self.TypeData(self)
tdata.name = '%s : %d' % (targetType.typeId, bitsize)
tdata.typeId = typeId
tdata.code = TypeCodeBitfield
tdata.ltarget = targetType
tdata.lbitsize = bitsize
self.registerType(typeId, tdata)
return self.Type(self, typeId)
def createTypedefedType(self, targetType, typeName, typeId = None):
if typeId is None:
typeId = typeName
if not isinstance(targetType, self.Type):
error('Expected type in createTypedefType(), got %s'
% type(targetType))
# Happens for C-style struct in GDB: typedef { int x; } struct S1;
if targetType.typeId == typeId:
return targetType
tdata = self.TypeData(self)
tdata.name = typeName
tdata.typeId = typeId
tdata.code = TypeCodeTypedef
tdata.ltarget = targetType
tdata.lbitsize = targetType.lbitsize
#tdata.lfields = targetType.lfields
tdata.lbitsize = targetType.lbitsize
self.registerType(typeId, tdata)
return self.Type(self, typeId)
def createType(self, typish, size = None):
if isinstance(typish, self.Type):
#typish.check()
return typish
if isinstance(typish, str):
if typish.endswith(']') and not typish.endswith('[]'):
# Array fallback.
pos1 = typish.rfind('[')
itemType = self.createType(typish[0:pos1].strip())
itemCount = int(typish[pos1+1:-1])
return self.createArrayType(itemType, itemCount)
def knownSize(tn):
if tn[0] == 'Q':
if tn in ('QByteArray', 'QString', 'QList', 'QStringList',
'QStringDataPtr'):
return self.ptrSize()
if tn == 'QStandardItemData':
return 8 + 2 * self.ptrSize()
if tn in ('QImage', 'QObject'):
return 2 * self.ptrSize()
if tn == 'QVariant':
return 8 + self.ptrSize()
if typish in ('QPointF', 'QDateTime', 'QRect'):
return 16
if typish == 'QPoint':
return 8
if typish == 'Qt::ItemDataRole':
return 4
if typish == 'QChar':
return 2
if typish in ('quint32', 'qint32'):
return 4
return None
ns = self.qtNamespace()
typish = typish.replace('@', ns)
if typish.startswith(ns):
if size is None:
size = knownSize(typish[len(ns):])
else:
if size is None:
size = knownSize(typish)
if size is not None:
typish = ns + typish
tdata = self.typeData.get(typish, None)
if tdata is not None:
return self.Type(self, typish)
knownType = self.lookupType(typish)
#warn('KNOWN: %s' % knownType)
if knownType is not None:
#warn('USE FROM NATIVE')
return knownType
#warn('FAKING: %s SIZE: %s' % (typish, size))
tdata = self.TypeData(self)
tdata.name = typish
tdata.typeId = typish
if size is not None:
tdata.lbitsize = 8 * size
self.registerType(typish, tdata)
typeobj = self.Type(self, typish)
#warn('CREATE TYPE: %s' % typeobj.stringify())
typeobj.check()
return typeobj
error('NEED TYPE, NOT %s' % type(typish))
def createValue(self, datish, typish):
val = self.Value(self)
val.type = self.createType(typish)
if self.isInt(datish): # Used as address.
#warn('CREATING %s AT 0x%x' % (val.type.name, datish))
val.laddress = datish
val.type = val.type.dynamicType(datish)
return val
if isinstance(datish, bytes):
#warn('CREATING %s WITH DATA %s' % (val.type.name, self.hexencode(datish)))
val.ldata = datish
val.check()
return val
error('EXPECTING ADDRESS OR BYTES, GOT %s' % type(datish))
def createContainerItem(self, data, innerTypish, container):
innerType = self.createType(innerTypish)
name = self.qtNamespace() + '%s<%s>' % (container, innerType.name)
typeId = name
tdata = self.TypeData(self)
tdata.typeId = typeId
tdata.name = name
tdata.templateArguments = [innerType]
tdata.lbitsize = 8 * self.ptrSize()
self.registerType(typeId, tdata)
val = self.Value(self)
val.ldata = data
val.type = self.Type(self, typeId)
return val
def createListItem(self, data, innerTypish):
return self.createContainerItem(data, innerTypish, 'QList')
def createVectorItem(self, data, innerTypish):
return self.createContainerItem(data, innerTypish, 'QVector')
class StructBuilder:
def __init__(self, dumper):
self.dumper = dumper
self.pattern = ''
self.currentBitsize = 0
self.fields = []
self.autoPadNext = False
self.maxAlign = 1
def addField(self, fieldSize, fieldCode = None, fieldIsStruct = False,
fieldName = None, fieldType = None, fieldAlign = 1):
if fieldType is not None:
fieldType = self.dumper.createType(fieldType)
if fieldSize is None and fieldType is not None:
fieldSize = fieldType.size()
if fieldCode is None:
fieldCode = '%ss' % fieldSize
if self.autoPadNext:
self.currentBitsize = 8 * ((self.currentBitsize + 7) >> 3) # Fill up byte.
padding = (fieldAlign - (self.currentBitsize >> 3)) % fieldAlign
#warn('AUTO PADDING AT %s BITS BY %s BYTES' % (self.currentBitsize, padding))
field = self.dumper.Field(self.dumper, bitpos=self.currentBitsize,
bitsize=padding*8)
self.pattern += '%ds' % padding
self.currentBitsize += padding * 8
self.fields.append(field)
self.autoPadNext = False
if fieldAlign > self.maxAlign:
self.maxAlign = fieldAlign
#warn("MAX ALIGN: %s" % self.maxAlign)
field = self.dumper.Field(dumper=self.dumper, name=fieldName, type=fieldType,
isStruct=fieldIsStruct, bitpos=self.currentBitsize,
bitsize=fieldSize * 8)
self.pattern += fieldCode
self.currentBitsize += fieldSize * 8
self.fields.append(field)
def describeStruct(self, pattern):
if pattern in self.structPatternCache:
return self.structPatternCache[pattern]
ptrSize = self.ptrSize()
builder = self.StructBuilder(self)
n = None
typeName = ''
readingTypeName = False
for c in pattern:
if readingTypeName:
if c == '}':
readingTypeName = False
fieldType = self.createType(typeName)
fieldAlign = fieldType.alignment()
builder.addField(n, fieldIsStruct = True,
fieldType = fieldType, fieldAlign = fieldAlign)
typeName = None
n = None
else:
typeName += c
elif c == 't': # size_t
builder.addField(ptrSize, self.ptrCode(), fieldAlign = ptrSize)
elif c == 'p': # Pointer as int
builder.addField(ptrSize, self.ptrCode(), fieldAlign = ptrSize)
elif c == 'P': # Pointer as Value
builder.addField(ptrSize, '%ss' % ptrSize, fieldAlign = ptrSize)
elif c in ('d'):
builder.addField(8, c, fieldAlign = ptrSize) # fieldType = 'double' ?
elif c in ('q', 'Q'):
builder.addField(8, c, fieldAlign = ptrSize)
elif c in ('i', 'I', 'f'):
builder.addField(4, c, fieldAlign = 4)
elif c in ('h', 'H'):
builder.addField(2, c, fieldAlign = 2)
elif c in ('b', 'B', 'c'):
builder.addField(1, c, fieldAlign = 1)
elif c >= '0' and c <= '9':
if n is None:
n = ''
n += c
elif c == 's':
builder.addField(int(n), fieldAlign = 1)
n = None
elif c == '{':
readingTypeName = True
typeName = ''
elif c == '@':
if n is None:
# Automatic padding depending on next item
builder.autoPadNext = True
else:
# Explicit padding.
builder.currentBitsize = 8 * ((builder.currentBitsize + 7) >> 3)
padding = (int(n) - (builder.currentBitsize >> 3)) % int(n)
field = self.Field(self)
builder.pattern += '%ds' % padding
builder.currentBitsize += padding * 8
builder.fields.append(field)
n = None
else:
error('UNKNOWN STRUCT CODE: %s' % c)
pp = builder.pattern
size = (builder.currentBitsize + 7) >> 3
fields = builder.fields
tailPad = (builder.maxAlign - size) % builder.maxAlign
size += tailPad
self.structPatternCache[pattern] = (pp, size, fields)
return (pp, size, fields)
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