dotfiles/.config/gdb/.unused/qt.py

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# -*- coding: iso-8859-1 -*-
# Pretty-printers for Qt 4 and Qt 5.
# Copyright (C) 2009 Niko Sams <niko.sams@gmail.com>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import gdb
import itertools
import re
import time
from helper import *
class QStringPrinter:
def __init__(self, val):
self.val = val
def to_string(self):
size = self.val['d']['size']
ret = ""
# The QString object might be not yet initialized. In this case size is a bogus value
# and the following 2 lines might throw memory access error. Hence the try/catch.
try:
isQt4 = has_field(self.val['d'], 'data') # Qt4 has d->data, Qt5 doesn't.
if isQt4:
dataAsCharPointer = self.val['d']['data'].cast(gdb.lookup_type("char").pointer())
else:
dataAsCharPointer = (self.val['d'] + 1).cast(gdb.lookup_type("char").pointer())
ret = dataAsCharPointer.string(encoding = 'UTF-16', length = size * 2)
except Exception:
# swallow the exception and return empty string
pass
return ret
def display_hint (self):
return 'string'
class QByteArrayPrinter:
def __init__(self, val):
self.val = val
# Qt4 has 'data', Qt5 doesn't
self.isQt4 = has_field(self.val['d'], 'data')
class _iterator(Iterator):
def __init__(self, data, size):
self.data = data
self.size = size
self.count = 0
def __iter__(self):
return self
def __next__(self):
if self.count >= self.size:
raise StopIteration
count = self.count
self.count = self.count + 1
return ('[%d]' % count, self.data[count])
def stringData(self):
if self.isQt4:
return self.val['d']['data']
else:
return self.val['d'].cast(gdb.lookup_type("char").const().pointer()) + self.val['d']['offset']
def children(self):
return self._iterator(self.stringData(), self.val['d']['size'])
def to_string(self):
#todo: handle charset correctly
return self.stringData()
def display_hint (self):
return 'string'
class QListPrinter:
"Print a QList"
class _iterator(Iterator):
def __init__(self, nodetype, d):
self.nodetype = nodetype
self.d = d
self.count = 0
#from QTypeInfo::isLarge
isLarge = self.nodetype.sizeof > gdb.lookup_type('void').pointer().sizeof
isPointer = self.nodetype.code == gdb.TYPE_CODE_PTR
#unfortunately we can't use QTypeInfo<T>::isStatic as it's all inlined, so use
#this list of types that use Q_DECLARE_TYPEINFO(T, Q_MOVABLE_TYPE)
#(obviously it won't work for custom types)
movableTypes = ['QRect', 'QRectF', 'QString', 'QMargins', 'QLocale', 'QChar', 'QDate', 'QTime', 'QDateTime', 'QVector',
'QRegExpr', 'QPoint', 'QPointF', 'QByteArray', 'QSize', 'QSizeF', 'QBitArray', 'QLine', 'QLineF', 'QModelIndex', 'QPersitentModelIndex',
'QVariant', 'QFileInfo', 'QUrl', 'QXmlStreamAttribute', 'QXmlStreamNamespaceDeclaration', 'QXmlStreamNotationDeclaration',
'QXmlStreamEntityDeclaration', 'QPair<int, int>']
#this list of types that use Q_DECLARE_TYPEINFO(T, Q_PRIMITIVE_TYPE) (from qglobal.h)
primitiveTypes = ['bool', 'char', 'signed char', 'unsigned char', 'short', 'unsigned short', 'int', 'unsigned int', 'long', 'unsigned long', 'long long', 'unsigned long long', 'float', 'double']
if movableTypes.count(self.nodetype.tag) or primitiveTypes.count(str(self.nodetype)):
isStatic = False
else:
isStatic = not isPointer
self.externalStorage = isLarge or isStatic #see QList::Node::t()
def __iter__(self):
return self
def __next__(self):
if self.count >= self.d['end'] - self.d['begin']:
raise StopIteration
count = self.count
array = self.d['array'].address + self.d['begin'] + count
if self.externalStorage:
value = array.cast(gdb.lookup_type('QList<%s>::Node' % self.nodetype).pointer())['v']
else:
value = array
self.count = self.count + 1
return ('[%d]' % count, value.cast(self.nodetype.pointer()).dereference())
def __init__(self, val, container, itype):
self.d = val['d']
self.container = container
self.size = self.d['end'] - self.d['begin']
if itype == None:
self.itype = val.type.template_argument(0)
else:
self.itype = gdb.lookup_type(itype)
def children(self):
return self._iterator(self.itype, self.d)
def to_string(self):
return "%s<%s> (size = %s)" % ( self.container, self.itype, self.size )
class QVectorPrinter:
"Print a QVector"
class _iterator(Iterator):
def __init__(self, nodetype, data, size):
self.nodetype = nodetype
self.data = data
self.size = size
self.count = 0
def __iter__(self):
return self
def __next__(self):
if self.count >= self.size:
raise StopIteration
count = self.count
self.count = self.count + 1
return ('[%d]' % count, self.data[count])
def __init__(self, val, container):
self.val = val
self.container = container
self.itype = self.val.type.template_argument(0)
def children(self):
isQt4 = has_field(self.val['d'], 'p') # Qt4 has 'p', Qt5 doesn't
if isQt4:
return self._iterator(self.itype, self.val['p']['array'], self.val['p']['size'])
else:
data = self.val['d'].cast(gdb.lookup_type("char").const().pointer()) + self.val['d']['offset']
return self._iterator(self.itype, data.cast(self.itype.pointer()), self.val['d']['size'])
def to_string(self):
size = self.val['d']['size']
return "%s<%s> (size = %s)" % ( self.container, self.itype, size )
class QLinkedListPrinter:
"Print a QLinkedList"
class _iterator(Iterator):
def __init__(self, nodetype, begin, size):
self.nodetype = nodetype
self.it = begin
self.pos = 0
self.size = size
def __iter__(self):
return self
def __next__(self):
if self.pos >= self.size:
raise StopIteration
pos = self.pos
val = self.it['t']
self.it = self.it['n']
self.pos = self.pos + 1
return ('[%d]' % pos, val)
def __init__(self, val):
self.val = val
self.itype = self.val.type.template_argument(0)
def children(self):
return self._iterator(self.itype, self.val['e']['n'], self.val['d']['size'])
def to_string(self):
size = self.val['d']['size']
return "QLinkedList<%s> (size = %s)" % ( self.itype, size )
class QMapPrinter:
"Print a QMap"
class _iteratorQt4(Iterator):
def __init__(self, val):
self.val = val
self.ktype = self.val.type.template_argument(0)
self.vtype = self.val.type.template_argument(1)
self.data_node = self.val['e']['forward'][0]
self.count = 0
def __iter__(self):
return self
def payload (self):
if gdb.parse_and_eval:
ret = int(gdb.parse_and_eval('QMap<%s, %s>::payload()' % (self.ktype, self.vtype)))
if (ret): return ret;
#if the inferior function call didn't work, let's try to calculate ourselves
#we can't use QMapPayloadNode as it's inlined
#as a workaround take the sum of sizeof(members)
ret = self.ktype.sizeof
ret += self.vtype.sizeof
ret += gdb.lookup_type('void').pointer().sizeof
#but because of data alignment the value can be higher
#so guess it's aliged by sizeof(void*)
#TODO: find a real solution for this problem
ret += ret % gdb.lookup_type('void').pointer().sizeof
#for some reason booleans are different
if str(self.vtype) == 'bool':
ret += 2
ret -= gdb.lookup_type('void').pointer().sizeof
return ret
def concrete (self, data_node):
node_type = gdb.lookup_type('QMapNode<%s, %s>' % (self.ktype, self.vtype)).pointer()
return (data_node.cast(gdb.lookup_type('char').pointer()) - self.payload()).cast(node_type)
def __next__(self):
if self.data_node == self.val['e']:
raise StopIteration
node = self.concrete(self.data_node).dereference()
if self.count % 2 == 0:
item = node['key']
else:
item = node['value']
self.data_node = node['forward'][0]
result = ('[%d]' % self.count, item)
self.count = self.count + 1
return result
class _iteratorQt5:
def __init__(self, val):
realtype = val.type.strip_typedefs()
keytype = realtype.template_argument(0)
valtype = realtype.template_argument(1)
node_type = gdb.lookup_type('QMapData<' + keytype.name + ',' + valtype.name + '>::Node')
self.node_p_type = node_type.pointer()
self.root = val['d']['header']
self.current = None
self.next_is_key = True
self.i = -1
# we store the path here to avoid keeping re-fetching
# values from the inferior (also, skips the pointer
# arithmetic involved in using the parent pointer)
self.path = []
def __iter__(self):
return self
def moveToNextNode(self):
if self.current is None:
# find the leftmost node
if not self.root['left']:
return False
self.current = self.root
while self.current['left']:
self.path.append(self.current)
self.current = self.current['left']
elif self.current['right']:
self.path.append(self.current)
self.current = self.current['right']
while self.current['left']:
self.path.append(self.current)
self.current = self.current['left']
else:
last = self.current
self.current = self.path.pop()
while self.current['right'] == last:
last = self.current
self.current = self.path.pop()
# if there are no more parents, we are at the root
if len(self.path) == 0:
return False
return True
def __next__(self):
if self.next_is_key:
if not self.moveToNextNode():
raise StopIteration
self.current_typed = self.current.reinterpret_cast(self.node_p_type)
self.next_is_key = False
self.i += 1
return ('key' + str(self.i), self.current_typed['key'])
else:
self.next_is_key = True
return ('value' + str(self.i), self.current_typed['value'])
def next(self):
return self.__next__()
def __init__(self, val, container):
self.val = val
self.container = container
def children(self):
if self.val['d']['size'] == 0:
return []
isQt4 = has_field(self.val, 'e') # Qt4 has 'e', Qt5 doesn't
if isQt4:
return self._iteratorQt4(self.val)
else:
return self._iteratorQt5(self.val)
def to_string(self):
size = self.val['d']['size']
return "%s<%s, %s> (size = %s)" % ( self.container, self.val.type.template_argument(0), self.val.type.template_argument(1), size )
def display_hint (self):
return 'map'
class QHashPrinter:
"Print a QHash"
class _iterator(Iterator):
def __init__(self, val):
self.val = val
self.d = self.val['d']
self.ktype = self.val.type.template_argument(0)
self.vtype = self.val.type.template_argument(1)
self.end_node = self.d.cast(gdb.lookup_type('QHashData::Node').pointer())
self.data_node = self.firstNode()
self.count = 0
def __iter__(self):
return self
def hashNode (self):
"Casts the current QHashData::Node to a QHashNode and returns the result. See also QHash::concrete()"
return self.data_node.cast(gdb.lookup_type('QHashNode<%s, %s>' % (self.ktype, self.vtype)).pointer())
def firstNode (self):
"Get the first node, See QHashData::firstNode()."
e = self.d.cast(gdb.lookup_type('QHashData::Node').pointer())
#print "QHashData::firstNode() e %s" % e
bucketNum = 0
bucket = self.d['buckets'][bucketNum]
#print "QHashData::firstNode() *bucket %s" % bucket
n = self.d['numBuckets']
#print "QHashData::firstNode() n %s" % n
while n:
#print "QHashData::firstNode() in while, n %s" % n;
if bucket != e:
#print "QHashData::firstNode() in while, return *bucket %s" % bucket
return bucket
bucketNum += 1
bucket = self.d['buckets'][bucketNum]
#print "QHashData::firstNode() in while, new bucket %s" % bucket
n -= 1
#print "QHashData::firstNode() return e %s" % e
return e
def nextNode (self, node):
"Get the nextNode after the current, see also QHashData::nextNode()."
#print "******************************** nextNode"
#print "nextNode: node %s" % node
next = node['next'].cast(gdb.lookup_type('QHashData::Node').pointer())
e = next
#print "nextNode: next %s" % next
if next['next']:
#print "nextNode: return next"
return next
#print "nextNode: node->h %s" % node['h']
#print "nextNode: numBuckets %s" % self.d['numBuckets']
start = (node['h'] % self.d['numBuckets']) + 1
bucketNum = start
#print "nextNode: start %s" % start
bucket = self.d['buckets'][start]
#print "nextNode: bucket %s" % bucket
n = self.d['numBuckets'] - start
#print "nextNode: n %s" % n
while n:
#print "nextNode: in while; n %s" % n
#print "nextNode: in while; e %s" % e
#print "nextNode: in while; *bucket %s" % bucket
if bucket != e:
#print "nextNode: in while; return bucket %s" % bucket
return bucket
bucketNum += 1
bucket = self.d['buckets'][bucketNum]
n -= 1
#print "nextNode: return e %s" % e
return e
def __next__(self):
"GDB iteration, first call returns key, second value and then jumps to the next hash node."
if self.data_node == self.end_node:
raise StopIteration
node = self.hashNode()
if self.count % 2 == 0:
item = node['key']
else:
item = node['value']
self.data_node = self.nextNode(self.data_node)
self.count = self.count + 1
return ('[%d]' % self.count, item)
def __init__(self, val, container):
self.val = val
self.container = container
def children(self):
return self._iterator(self.val)
def to_string(self):
size = self.val['d']['size']
return "%s<%s, %s> (size = %s)" % ( self.container, self.val.type.template_argument(0), self.val.type.template_argument(1), size )
def display_hint (self):
return 'map'
class QDatePrinter:
def __init__(self, val):
self.val = val
def to_string(self):
julianDay = self.val['jd']
if julianDay == 0:
return "invalid QDate"
# Copied from Qt sources
if julianDay >= 2299161:
# Gregorian calendar starting from October 15, 1582
# This algorithm is from Henry F. Fliegel and Thomas C. Van Flandern
ell = julianDay + 68569;
n = (4 * ell) / 146097;
ell = ell - (146097 * n + 3) / 4;
i = (4000 * (ell + 1)) / 1461001;
ell = ell - (1461 * i) / 4 + 31;
j = (80 * ell) / 2447;
d = ell - (2447 * j) / 80;
ell = j / 11;
m = j + 2 - (12 * ell);
y = 100 * (n - 49) + i + ell;
else:
# Julian calendar until October 4, 1582
# Algorithm from Frequently Asked Questions about Calendars by Claus Toendering
julianDay += 32082;
dd = (4 * julianDay + 3) / 1461;
ee = julianDay - (1461 * dd) / 4;
mm = ((5 * ee) + 2) / 153;
d = ee - (153 * mm + 2) / 5 + 1;
m = mm + 3 - 12 * (mm / 10);
y = dd - 4800 + (mm / 10);
if y <= 0:
--y;
return "%d-%02d-%02d" % (y, m, d)
class QTimePrinter:
def __init__(self, val):
self.val = val
def to_string(self):
ds = self.val['mds']
if ds == -1:
return "invalid QTime"
MSECS_PER_HOUR = 3600000
SECS_PER_MIN = 60
MSECS_PER_MIN = 60000
hour = ds / MSECS_PER_HOUR
minute = (ds % MSECS_PER_HOUR) / MSECS_PER_MIN
second = (ds / 1000)%SECS_PER_MIN
msec = ds % 1000
return "%02d:%02d:%02d.%03d" % (hour, minute, second, msec)
class QDateTimePrinter:
def __init__(self, val):
self.val = val
def to_string(self):
time_t = gdb.parse_and_eval("reinterpret_cast<const QDateTime*>(%s)->toSecsSinceEpoch()" % self.val.address)
return time.ctime(int(time_t))
class QUrlPrinter:
def __init__(self, val):
self.val = val
def to_string(self):
# first try to access the Qt 5 data
try:
int_type = gdb.lookup_type('int')
string_type = gdb.lookup_type('QString')
string_pointer = string_type.pointer()
addr = self.val['d'].cast(gdb.lookup_type('char').pointer())
# skip QAtomicInt ref
addr += int_type.sizeof
# handle int port
port = addr.cast(int_type.pointer()).dereference()
addr += int_type.sizeof
# handle QString scheme
scheme = QStringPrinter(addr.cast(string_pointer).dereference()).to_string()
addr += string_type.sizeof
# handle QString username
username = QStringPrinter(addr.cast(string_pointer).dereference()).to_string()
addr += string_type.sizeof
# skip QString password
addr += string_type.sizeof
# handle QString host
host = QStringPrinter(addr.cast(string_pointer).dereference()).to_string()
addr += string_type.sizeof
# handle QString path
path = QStringPrinter(addr.cast(string_pointer).dereference()).to_string()
addr += string_type.sizeof
# handle QString query
query = QStringPrinter(addr.cast(string_pointer).dereference()).to_string()
addr += string_type.sizeof
# handle QString fragment
fragment = QStringPrinter(addr.cast(string_pointer).dereference()).to_string()
url = ""
if len(scheme) > 0:
# TODO: always adding // is apparently not compliant in all cases
url += scheme + "://"
if len(host) > 0:
if len(username) > 0:
url += username + "@"
url += host
if port != -1:
url += ":" + str(port)
url += path
if len(query) > 0:
url += "?" + query
if len(fragment) > 0:
url += "#" + fragment
return url
except:
pass
# then try to print directly, but that might lead to issues (see http://sourceware-org.1504.n7.nabble.com/help-Calling-malloc-from-a-Python-pretty-printer-td284031.html)
try:
return gdb.parse_and_eval("reinterpret_cast<const QUrl*>(%s)->toString((QUrl::FormattingOptions)QUrl::PrettyDecoded)" % self.val.address)
except:
pass
# if everything fails, maybe we deal with Qt 4 code
try:
return self.val['d']['encodedOriginal']
except RuntimeError:
#if no debug information is available for Qt, try guessing the correct address for encodedOriginal
#problem with this is that if QUrlPrivate members get changed, this fails
offset = gdb.lookup_type('int').sizeof
offset += offset % gdb.lookup_type('void').pointer().sizeof #alignment
offset += gdb.lookup_type('QString').sizeof * 6
offset += gdb.lookup_type('QByteArray').sizeof
encodedOriginal = self.val['d'].cast(gdb.lookup_type('char').pointer());
encodedOriginal += offset
encodedOriginal = encodedOriginal.cast(gdb.lookup_type('QByteArray').pointer()).dereference();
encodedOriginal = encodedOriginal['d']['data'].string()
return encodedOriginal
class QSetPrinter:
"Print a QSet"
def __init__(self, val):
self.val = val
class _iterator(Iterator):
def __init__(self, hashIterator):
self.hashIterator = hashIterator
self.count = 0
def __iter__(self):
return self
def __next__(self):
if self.hashIterator.data_node == self.hashIterator.end_node:
raise StopIteration
node = self.hashIterator.hashNode()
item = node['key']
self.hashIterator.data_node = self.hashIterator.nextNode(self.hashIterator.data_node)
self.count = self.count + 1
return ('[%d]' % (self.count-1), item)
def children(self):
hashPrinter = QHashPrinter(self.val['q_hash'], None)
hashIterator = hashPrinter._iterator(self.val['q_hash'])
return self._iterator(hashIterator)
def to_string(self):
size = self.val['q_hash']['d']['size']
return "QSet<%s> (size = %s)" % ( self.val.type.template_argument(0), size )
class QCharPrinter:
def __init__(self, val):
self.val = val
def to_string(self):
return unichr(self.val['ucs'])
def display_hint (self):
return 'string'
class QUuidPrinter:
def __init__(self, val):
self.val = val
def to_string(self):
return "QUuid({%x-%x-%x-%x%x-%x%x%x%x%x%x})" % (int(self.val['data1']), int(self.val['data2']), int(self.val['data3']),
int(self.val['data4'][0]), int(self.val['data4'][1]),
int(self.val['data4'][2]), int(self.val['data4'][3]),
int(self.val['data4'][4]), int(self.val['data4'][5]),
int(self.val['data4'][6]), int(self.val['data4'][7]))
def display_hint (self):
return 'string'
pretty_printers_dict = {}
def register_qt_printers (obj):
if obj == None:
obj = gdb
obj.pretty_printers.append(FunctionLookup(gdb, pretty_printers_dict))
def build_dictionary ():
pretty_printers_dict[re.compile('^QString$')] = lambda val: QStringPrinter(val)
pretty_printers_dict[re.compile('^QByteArray$')] = lambda val: QByteArrayPrinter(val)
pretty_printers_dict[re.compile('^QList<.*>$')] = lambda val: QListPrinter(val, 'QList', None)
pretty_printers_dict[re.compile('^QStringList$')] = lambda val: QListPrinter(val, 'QStringList', 'QString')
pretty_printers_dict[re.compile('^QQueue')] = lambda val: QListPrinter(val, 'QQueue', None)
pretty_printers_dict[re.compile('^QVector<.*>$')] = lambda val: QVectorPrinter(val, 'QVector')
pretty_printers_dict[re.compile('^QStack<.*>$')] = lambda val: QVectorPrinter(val, 'QStack')
pretty_printers_dict[re.compile('^QLinkedList<.*>$')] = lambda val: QLinkedListPrinter(val)
pretty_printers_dict[re.compile('^QMap<.*>$')] = lambda val: QMapPrinter(val, 'QMap')
pretty_printers_dict[re.compile('^QMultiMap<.*>$')] = lambda val: QMapPrinter(val, 'QMultiMap')
pretty_printers_dict[re.compile('^QHash<.*>$')] = lambda val: QHashPrinter(val, 'QHash')
pretty_printers_dict[re.compile('^QMultiHash<.*>$')] = lambda val: QHashPrinter(val, 'QMultiHash')
pretty_printers_dict[re.compile('^QDate$')] = lambda val: QDatePrinter(val)
pretty_printers_dict[re.compile('^QTime$')] = lambda val: QTimePrinter(val)
pretty_printers_dict[re.compile('^QDateTime$')] = lambda val: QDateTimePrinter(val)
pretty_printers_dict[re.compile('^QUrl$')] = lambda val: QUrlPrinter(val)
pretty_printers_dict[re.compile('^QSet<.*>$')] = lambda val: QSetPrinter(val)
pretty_printers_dict[re.compile('^QChar$')] = lambda val: QCharPrinter(val)
pretty_printers_dict[re.compile('^QUuid')] = lambda val: QUuidPrinter(val)
build_dictionary ()