dumper.py

import sys
import base64
import __builtin__
import os
import tempfile

# Fails on Windows.
try:
    import curses.ascii
    def printableChar(ucs):
        if curses.ascii.isprint(ucs):
            return ucs
        return '?'
except:
    def printableChar(ucs):
        if ucs >= 32 and ucs <= 126:
            return ucs
        return '?'

# Fails on SimulatorQt.
tempFileCounter = 0
try:
    # Test if 2.6 is used (Windows), trigger exception and default
    # to 2nd version.
    tempfile.NamedTemporaryFile(prefix="py_",delete=True)
    def createTempFile():
        file = tempfile.NamedTemporaryFile(prefix="py_",delete=False)
        file.close()
        return file.name, file

except:
    def createTempFile():
        global tempFileCounter
        tempFileCounter += 1
        fileName = "%s/py_tmp_%d_%d" \
            % (tempfile.gettempdir(), os.getpid(), tempFileCounter)
        return fileName, None

def removeTempFile(name, file):
    try:
        os.remove(name)
    except:
        pass

try:
    import binascii
except:
    pass

verbosity = 0
verbosity = 1

# Some "Enums"

# Encodings
Unencoded8Bit, \
Base64Encoded8BitWithQuotes, \
Base64Encoded16BitWithQuotes, \
Base64Encoded32BitWithQuotes, \
Base64Encoded16Bit, \
Base64Encoded8Bit, \
Hex2EncodedLatin1, \
Hex4EncodedLittleEndian, \
Hex8EncodedLittleEndian, \
Hex2EncodedUtf8, \
Hex8EncodedBigEndian, \
Hex4EncodedBigEndian, \
Hex4EncodedLittleEndianWithoutQuotes, \
Hex2EncodedLocal8Bit, \
JulianDate, \
MillisecondsSinceMidnight, \
JulianDateAndMillisecondsSinceMidnight \
    = range(17)

# Display modes
StopDisplay, \
DisplayImage1, \
DisplayString, \
DisplayImage, \
DisplayProcess \
    = range(5)


def hasInferiorThreadList():
    #return False
    try:
        a = gdb.inferiors()[0].threads()
        return True
    except:
        return False

def dynamicTypeName(value):
    #vtbl = str(parseAndEvaluate("{int(*)(int)}%s" % long(value.address)))
    try:
        # Fails on 7.1 due to the missing to_string.
        vtbl = gdb.execute("info symbol {int*}%s" % long(value.address),
            to_string = True)
        pos1 = vtbl.find("vtable ")
        if pos1 != -1:
            pos1 += 11
            pos2 = vtbl.find(" +", pos1)
            if pos2 != -1:
                return vtbl[pos1 : pos2]
    except:
        pass
    return str(value.type)

def upcast(value):
    try:
        return value.cast(value.dynamic_type)
    except:
        pass
    #try:
    #    return value.cast(lookupType(dynamicTypeName(value)))
    #except:
    #    pass
    return value

def expensiveUpcast(value):
    try:
        return value.cast(value.dynamic_type)
    except:
        pass
    try:
        return value.cast(lookupType(dynamicTypeName(value)))
    except:
        pass
    return value

typeCache = {}

class TypeInfo:
    def __init__(self, type):
        self.size = type.sizeof
        self.reported = False

typeInfoCache = {}

def lookupType(typestring):
    type = typeCache.get(typestring)
    #warn("LOOKUP 1: %s -> %s" % (typestring, type))
    if not type is None:
        return type

    if typestring == "void":
        type = gdb.lookup_type(typestring)
        typeCache[typestring] = type
        return type

    if typestring.find("(anon") != -1:
        # gdb doesn't like
        # '(anonymous namespace)::AddAnalysisMessageSuppressionComment'
        typeCache[typestring] = None
        return None

    try:
        type = gdb.parse_and_eval("{%s}&main" % typestring).type
        typeCache[typestring] = type
        return type
    except:
        pass

    #warn(" RESULT FOR 7.2: '%s': %s" % (typestring, type))
    #typeCache[typestring] = type
    #return None

    # This part should only trigger for
    # gdb 7.1 for types with namespace separators.

    ts = typestring
    while True:
        #warn("TS: '%s'" % ts)
        if ts.startswith("class "):
            ts = ts[6:]
        elif ts.startswith("struct "):
            ts = ts[7:]
        elif ts.startswith("const "):
            ts = ts[6:]
        elif ts.startswith("volatile "):
            ts = ts[9:]
        elif ts.startswith("enum "):
            ts = ts[5:]
        elif ts.endswith(" const"):
            ts = ts[:-6]
        elif ts.endswith(" volatile"):
            ts = ts[:-9]
        elif ts.endswith("*const"):
            ts = ts[:-5]
        elif ts.endswith("*volatile"):
            ts = ts[:-8]
        else:
            break

    if ts.endswith('*'):
        type = lookupType(ts[0:-1])
        if not type is None:
            type = type.pointer()
            typeCache[typestring] = type
            return type

    try:
        #warn("LOOKING UP '%s'" % ts)
        type = gdb.lookup_type(ts)
    except RuntimeError, error:
        #warn("LOOKING UP '%s': %s" % (ts, error))
        if type is None:
            pos = typestring.find("<unnamed>")
            if pos != -1:
                # See http://sourceware.org/bugzilla/show_bug.cgi?id=13269
                return lookupType(typestring.replace("<unnamed>", "(anonymous namespace)"))
        # See http://sourceware.org/bugzilla/show_bug.cgi?id=11912
        exp = "(class '%s'*)0" % ts
        try:
            type = parseAndEvaluate(exp).type.target()
        except:
            # Can throw "RuntimeError: No type named class Foo."
            pass
    except:
        #warn("LOOKING UP '%s' FAILED" % ts)
        pass

    # This could still be None as gdb.lookup_type("char[3]") generates
    # "RuntimeError: No type named char[3]"
    return type

def cleanAddress(addr):
    if addr is None:
        return "<no address>"
    # We cannot use str(addr) as it yields rubbish for char pointers
    # that might trigger Unicode encoding errors.
    #return addr.cast(lookupType("void").pointer())
    # We do not use "hex(...)" as it (sometimes?) adds a "L" suffix.
    return "0x%x" % long(addr)

def extractTemplateArgument(type, position):
    level = 0
    skipSpace = False
    inner = ""
    type = str(type)
    for c in type[type.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
                position -= 1
                inner = ""
            else:
                inner += c
                skipSpace = True
        else:
            if skipSpace and c == ' ':
                pass
            else:
                inner += c
                skipSpace = False
    return inner

def templateArgument(type, position):
    try:
        # This fails on stock 7.2 with
        # "RuntimeError: No type named myns::QObject.\n"
        return type.template_argument(position)
    except:
        # That's something like "myns::QList<...>"
        return lookupType(extractTemplateArgument(type.strip_typedefs(), position))


# Workaround for gdb < 7.1
def numericTemplateArgument(type, position):
    try:
        return int(type.template_argument(position))
    except RuntimeError, error:
        # ": No type named 30."
        msg = str(error)
        msg = msg[14:-1]
        # gdb at least until 7.4 produces for std::array<int, 4u>
        # for template_argument(1): RuntimeError: No type named 4u.
        if msg[-1] == 'u':
           msg = msg[0:-1]
        return int(msg)


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


class OutputSafer:
    def __init__(self, d, pre = "", post = ""):
        self.d = d
        self.pre = pre
        self.post = post

    def __enter__(self):
        self.d.put(self.pre)
        self.savedOutput = self.d.output
        self.d.output = []

    def __exit__(self, exType, exValue, exTraceBack):
        self.d.put(self.post)
        if self.d.passExceptions and not exType is None:
            showException("OUTPUTSAFER", exType, exValue, exTraceBack)
            self.d.output = self.savedOutput
        else:
            self.savedOutput.extend(self.d.output)
            self.d.output = self.savedOutput
        return False


class NoAddress:
    def __init__(self, d):
        self.d = d

    def __enter__(self):
        self.savedPrintsAddress = self.d.currentPrintsAddress
        self.d.currentPrintsAddress = False

    def __exit__(self, exType, exValue, exTraceBack):
        self.d.currentPrintsAddress = self.savedPrintsAddress


class NoDynamicType:
    def __init__(self, d):
        self.d = d

    def __enter__(self):
        self.savedUseDynamicType = self.d.useDynamicType
        self.d.useDynamicType = False

    def __exit__(self, exType, exValue, exTraceBack):
        self.d.useDynamicType = self.savedUseDynamicType



class SubItem:
    def __init__(self, d, component):
        self.d = d
        self.iname = "%s.%s" % (d.currentIName, component)
        self.name = component

    def __enter__(self):
        self.d.put('{')
        #if not self.name is None:
        if isinstance(self.name, str):
            self.d.put('name="%s",' % self.name)
        self.savedIName = self.d.currentIName
        self.savedValue = self.d.currentValue
        self.savedValuePriority = self.d.currentValuePriority
        self.savedValueEncoding = self.d.currentValueEncoding
        self.savedType = self.d.currentType
        self.savedTypePriority = self.d.currentTypePriority
        self.d.currentIName = self.iname
        self.d.currentValuePriority = -100
        self.d.currentValueEncoding = None
        self.d.currentType = ""
        self.d.currentTypePriority = -100

    def __exit__(self, exType, exValue, exTraceBack):
        #warn(" CURRENT VALUE: %s %s %s" % (self.d.currentValue,
        #    self.d.currentValueEncoding, self.d.currentValuePriority))
        if self.d.passExceptions and not exType is None:
            showException("SUBITEM", exType, exValue, exTraceBack)
        try:
            #warn("TYPE VALUE: %s" % self.d.currentValue)
            typeName = stripClassTag(self.d.currentType)
            #warn("TYPE: '%s'  DEFAULT: '%s' % (typeName, self.d.currentChildType))

            if len(typeName) > 0 and typeName != self.d.currentChildType:
                self.d.put('type="%s",' % typeName) # str(type.unqualified()) ?
                if not typeName in typeInfoCache \
                        and typeName != " ": # FIXME: Move to lookupType
                    typeObj = lookupType(typeName)
                    if not typeObj is None:
                        typeInfoCache[typeName] = TypeInfo(typeObj)
            if  self.d.currentValue is None:
                self.d.put('value="<not accessible>",numchild="0",')
            else:
                if not self.d.currentValueEncoding is None:
                    self.d.put('valueencoded="%d",' % self.d.currentValueEncoding)
                self.d.put('value="%s",' % self.d.currentValue)
        except:
            pass
        self.d.put('},')
        self.d.currentIName = self.savedIName
        self.d.currentValue = self.savedValue
        self.d.currentValuePriority = self.savedValuePriority
        self.d.currentValueEncoding = self.savedValueEncoding
        self.d.currentType = self.savedType
        self.d.currentTypePriority = self.savedTypePriority
        return True

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 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
        self.addrBase = addrBase
        self.addrStep = addrStep
        self.printsAddress = True
        if childType is None:
            self.childType = None
        else:
            self.childType = stripClassTag(str(childType))
            self.d.put('childtype="%s",' % self.childType)
            if childNumChild is None:
                if isSimpleType(childType):
                    self.d.put('childnumchild="0",')
                    self.childNumChild = 0
                elif childType.code == PointerCode:
                    self.d.put('childnumchild="1",')
                    self.childNumChild = 1
            else:
                self.d.put('childnumchild="%s",' % childNumChild)
                self.childNumChild = childNumChild
        try:
            if not addrBase is None and not addrStep is None:
                self.d.put('addrbase="0x%x",' % long(addrBase))
                self.d.put('addrstep="0x%x",' % long(addrStep))
                self.printsAddress = False
        except:
            warn("ADDRBASE: %s" % addrBase)
        #warn("CHILDREN: %s %s %s" % (numChild, childType, childNumChild))

    def __enter__(self):
        self.savedChildType = self.d.currentChildType
        self.savedChildNumChild = self.d.currentChildNumChild
        self.savedNumChild = self.d.currentNumChild
        self.savedMaxNumChild = self.d.currentMaxNumChild
        self.savedPrintsAddress = self.d.currentPrintsAddress
        self.d.currentChildType = self.childType
        self.d.currentChildNumChild = self.childNumChild
        self.d.currentNumChild = self.numChild
        self.d.currentMaxNumChild = self.maxNumChild
        self.d.currentPrintsAddress = self.printsAddress
        self.d.put("children=[")

    def __exit__(self, exType, exValue, exTraceBack):
        if self.d.passExceptions and not exType is None:
            showException("CHILDREN", exType, exValue, exTraceBack)
        if not self.d.currentMaxNumChild is 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
        self.d.currentPrintsAddress = self.savedPrintsAddress
        self.d.put('],')
        return True


def value(expr):
    value = parseAndEvaluate(expr)
    try:
        return int(value)
    except:
        return str(value)

def isSimpleType(typeobj):
    code = typeobj.code
    return code == BoolCode \
        or code == CharCode \
        or code == IntCode \
        or code == FloatCode \
        or code == EnumCode

def warn(message):
    if True or verbosity > 0:
        print "XXX: %s\n" % message.encode("latin1")
    pass

def check(exp):
    if not exp:
        raise RuntimeError("Check failed")

def checkRef(ref):
    count = 0
    if qtMajorVersion() >= 5:
        count = ref["atomic"]["_q_value"]
    else:
        count = ref["_q_value"]
    check(count > 0)
    check(count < 1000000) # assume there aren't a million references to any object

#def couldBePointer(p, align):
#    type = lookupType("unsigned int")
#    ptr = gdb.Value(p).cast(type)
#    d = int(str(ptr))
#    warn("CHECKING : %s %d " % (p, ((d & 3) == 0 and (d > 1000 or d == 0))))
#    return (d & (align - 1)) and (d > 1000 or d == 0)


def checkAccess(p, align = 1):
    return p.dereference()

def checkContents(p, expected, align = 1):
    if int(p.dereference()) != expected:
        raise RuntimeError("Contents check failed")

def checkPointer(p, align = 1):
    if not isNull(p):
        p.dereference()

def isAccessible(p):
    try:
        long(p)
        return True
    except:
        return False

def isNull(p):
    # The following can cause evaluation to abort with "UnicodeEncodeError"
    # for invalid char *, as their "contents" is being examined
    #s = str(p)
    #return s == "0x0" or s.startswith("0x0 ")
    #try:
    #    # Can fail with: "RuntimeError: Cannot access memory at address 0x5"
    #    return p.cast(lookupType("void").pointer()) == 0
    #except:
    #    return False
    try:
        # Can fail with: "RuntimeError: Cannot access memory at address 0x5"
        return long(p) == 0
    except:
        return False

movableTypes = set([
    "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"
])

def stripClassTag(typeName):
    if typeName.startswith("class "):
        return typeName[6:]
    if typeName.startswith("struct "):
        return typeName[7:]
    if typeName.startswith("const "):
        return typeName[6:]
    if typeName.startswith("volatile "):
        return typeName[9:]
    return typeName

def checkPointerRange(p, n):
    for i in xrange(n):
        checkPointer(p)
        ++p

def call2(value, func, args):
    # args is a tuple.
    arg = ""
    for i in range(len(args)):
        if i:
            arg += ','
        a = args[i]
        if (':' in a) and not ("'" in a):
            arg = "'%s'" % a
        else:
            arg += a

    #warn("CALL: %s -> %s(%s)" % (value, func, arg))
    type = stripClassTag(str(value.type))
    if type.find(":") >= 0:
        type = "'" + type + "'"
    # 'class' is needed, see http://sourceware.org/bugzilla/show_bug.cgi?id=11912
    exp = "((class %s*)%s)->%s(%s)" % (type, value.address, func, arg)
    #warn("CALL: %s" % exp)
    result = None
    try:
        result = parseAndEvaluate(exp)
    except:
        pass
    #warn("  -> %s" % result)
    return result

def call(value, func, *args):
    return call2(value, func, args)

def makeValue(type, init):
    type = stripClassTag(type)
    if type.find(":") >= 0:
        type = "'" + type + "'"
    # Avoid malloc symbol clash with QVector.
    gdb.execute("set $d = (%s*)calloc(sizeof(%s), 1)" % (type, type))
    gdb.execute("set *$d = {%s}" % init)
    value = parseAndEvaluate("$d").dereference()
    #warn("  TYPE: %s" % value.type)
    #warn("  ADDR: %s" % value.address)
    #warn("  VALUE: %s" % value)
    return value

def makeStdString(init):
    # Works only for small allocators, but they are usually empty.
    gdb.execute("set $d=(std::string*)calloc(sizeof(std::string), 2)");
    gdb.execute("call($d->basic_string(\"" + init +
        "\",*(std::allocator<char>*)(1+$d)))")
    value = parseAndEvaluate("$d").dereference()
    #warn("  TYPE: %s" % value.type)
    #warn("  ADDR: %s" % value.address)
    #warn("  VALUE: %s" % value)
    return value


def makeExpression(value):
    type = stripClassTag(str(value.type))
    if type.find(":") >= 0:
        type = "'" + type + "'"
    #warn("  TYPE: %s" % type)
    #exp = "(*(%s*)(&%s))" % (type, value.address)
    exp = "(*(%s*)(%s))" % (type, value.address)
    #warn("  EXP: %s" % exp)
    return exp

qqNs = None

def qtNamespace():
    # FIXME: This only works when call from inside a Qt function frame.
    global qqNs
    if not qqNs is None:
        return qqNs
    try:
        str = catchCliOutput("ptype QString::Null")[0]
        # The result looks like:
        # "type = const struct myns::QString::Null {"
        # "    <no data fields>"
        # "}"
        pos1 = str.find("struct") + 7
        pos2 = str.find("QString::Null")
        if pos1 > -1 and pos2 > -1:
            qqNs = str[pos1:pos2]
            return qqNs
        return ""
    except:
        return ""

# --  Determine major Qt version by calling qVersion (cached)

qqMajorVersion = None

def qtMajorVersion():
    global qqMajorVersion
    if not qqMajorVersion is None:
        return qqMajorVersion
    try:
        # -- Result is returned as character, need to subtract '0'
        v = int(parseAndEvaluate("*(char*)qVersion()"))
        if v >= 51:
            qqMajorVersion = v - 48
            return qqMajorVersion
        return 0
    except:
        return 0

def findFirstZero(p, maximum):
    for i in xrange(maximum):
        if p.dereference() == 0:
            return i
        p = p + 1
    return maximum + 1

def extractCharArray(p, maxsize):
    p = p.cast(lookupType("unsigned char").pointer())
    s = ""
    i = 0
    while i < maxsize:
        c = int(p.dereference())
        if c == 0:
            return s
        s += "%c" % c
        p += 1
        i += 1
    if p.dereference() != 0:
        s += "..."
    return s

def extractByteArray(value):
    d_ptr = value['d'].dereference()
    data = d_ptr['data']
    size = d_ptr['size']
    alloc = d_ptr['alloc']
    check(0 <= size and size <= alloc and alloc <= 100*1000*1000)
    checkRef(d_ptr["ref"])
    if size > 0:
        checkAccess(data, 4)
        checkAccess(data + size) == 0
    return extractCharArray(data, min(100, size))

def encodeCharArray(p, maxsize, limit = -1):
    t = lookupType("unsigned char").pointer()
    p = p.cast(t)
    if limit == -1:
        limit = findFirstZero(p, maxsize)
    s = ""
    try:
        # gdb.Inferior is new in gdb 7.2
        inferior = gdb.inferiors()[0]
        s = binascii.hexlify(inferior.read_memory(p, limit))
    except:
        for i in xrange(limit):
            s += "%02x" % int(p.dereference())
            p += 1
    if limit > maxsize:
        s += "2e2e2e"
    return s

def encodeChar2Array(p, maxsize):
    t = lookupType("unsigned short").pointer()
    p = p.cast(t)
    limit = findFirstZero(p, maxsize)
    s = ""
    for i in xrange(limit):
        s += "%04x" % int(p.dereference())
        p += 1
    if i == maxsize:
        s += "2e002e002e00"
    return s

def encodeChar4Array(p, maxsize):
    t = lookupType("unsigned int").pointer()
    p = p.cast(t)
    limit = findFirstZero(p, maxsize)
    s = ""
    for i in xrange(limit):
        s += "%08x" % int(p.dereference())
        p += 1
    if i > maxsize:
        s += "2e0000002e0000002e000000"
    return s

def qByteArrayData(value):
    if qtMajorVersion() < 5:
        d_ptr = value['d'].dereference()
        checkRef(d_ptr["ref"])
        data = d_ptr['data']
        size = d_ptr['size']
        alloc = d_ptr['alloc']
        return data, size, alloc
    else: # Qt5: Implement the QByteArrayData::data() accessor.
        qByteArrayData = value['d'].dereference()
        size = qByteArrayData['size']
        alloc = qByteArrayData['alloc']
        charPointerType = lookupType('char *')
        data = qByteArrayData['d'].cast(charPointerType) \
             + qByteArrayData['offset'] + charPointerType.sizeof
        return data, size, alloc

def encodeByteArray(value):
    data, size, alloc = qByteArrayData(value)
    check(0 <= size and size <= alloc and alloc <= 100*1000*1000)
    if size > 0:
        checkAccess(data, 4)
        checkAccess(data + size) == 0
    return encodeCharArray(data, 100, size)

def qQStringData(value):
    if qtMajorVersion() < 5:
        d_ptr = value['d'].dereference()
        checkRef(d_ptr['ref'])
        return d_ptr['data'], int(d_ptr['size']), int(d_ptr['alloc'])
    else: # Qt5: Implement the QStringArrayData::data() accessor.
        qStringData = value['d'].dereference()
        ushortPointerType = lookupType('ushort *')
        data = qStringData['d'].cast(ushortPointerType) \
            + ushortPointerType.sizeof / 2 + qStringData['offset']
        return data, int(qStringData['size']), int(qStringData['alloc'])

def encodeString(value):
    data, size, alloc = qQStringData(value)

    check(0 <= size and size <= alloc and alloc <= 100*1000*1000)
    if size > 0:
        checkAccess(data, 4)
        checkAccess(data + size) == 0
    s = ""
    limit = min(size, 1000)
    try:
        # gdb.Inferior is new in gdb 7.2
        inferior = gdb.inferiors()[0]
        s = binascii.hexlify(inferior.read_memory(data, 2 * limit))
    except:
        p = data
        for i in xrange(limit):
            val = int(p.dereference())
            s += "%02x" % (val % 256)
            s += "%02x" % (val / 256)
            p += 1
    if limit < size:
        s += "2e002e002e00"
    return s

def stripTypedefs(type):
    type = type.unqualified()
    while type.code == TypedefCode:
        type = type.strip_typedefs().unqualified()
    return type

def extractFields(type):
    # Insufficient, see http://sourceware.org/bugzilla/show_bug.cgi?id=10953:
    #fields = type.fields()
    # Insufficient, see http://sourceware.org/bugzilla/show_bug.cgi?id=11777:
    #fields = defsype).fields()
    # This seems to work.
    #warn("TYPE 0: %s" % type)
    type = stripTypedefs(type)
    fields = type.fields()
    if len(fields):
        return fields
    #warn("TYPE 1: %s" % type)
    # This fails for arrays. See comment in lookupType.
    type0 = lookupType(str(type))
    if not type0 is None:
        type = type0
    if type.code == FunctionCode:
        return []
    #warn("TYPE 2: %s" % type)
    fields = type.fields()
    #warn("FIELDS: %s" % fields)
    return fields

#######################################################################
#
# LocalItem
#
#######################################################################

# Contains iname, name, and value.
class LocalItem:
    pass

#######################################################################
#
# SetupCommand
#
#######################################################################

# This is a cache mapping from 'type name' to 'display alternatives'.
qqFormats = {}

# This is a cache of all known dumpers.
qqDumpers = {}

# This is a cache of all dumpers that support writing.
qqEditable = {}

# This is a cache of the namespace of the currently used Qt version.
# FIXME: This is not available on 'bbsetup' time, only at 'bb' time.

# This is a cache of typenames->bool saying whether we are QObject
# derived.
qqQObjectCache = {}

# This keeps canonical forms of the typenames, without array indices etc.
qqStripForFormat = {}

def stripForFormat(typeName):
    if typeName in qqStripForFormat:
        return qqStripForFormat[typeName]
    stripped = ""
    inArray = 0
    for c in stripClassTag(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
    qqStripForFormat[typeName] = stripped
    return stripped

def bbsetup(args):
    typeInfoCache = {}
    typeCache = {}
    module = sys.modules[__name__]
    for key, value in module.__dict__.items():
        if key.startswith("qdump__"):
            name = key[7:]
            qqDumpers[name] = value
            qqFormats[name] = qqFormats.get(name, "")
        elif key.startswith("qform__"):
            name = key[7:]
            formats = ""
            try:
                formats = value()
            except:
                pass
            qqFormats[name] = formats
        elif key.startswith("qedit__"):
            name = key[7:]
            try:
                qqEditable[name] = value
            except:
                pass
    result = "dumpers=["
    #qqNs = qtNamespace() # This is too early
    for key, value in qqFormats.items():
        if qqEditable.has_key(key):
            result += '{type="%s",formats="%s",editable="true"},' % (key, value)
        else:
            result += '{type="%s",formats="%s"},' % (key, value)
    result += ']'
    #result += ',namespace="%s"' % qqNs
    result += ',hasInferiorThreadList="%s"' % int(hasInferiorThreadList())
    return result

registerCommand("bbsetup", bbsetup)


#######################################################################
#
# Edit Command
#
#######################################################################

def bbedit(args):
    (type, expr, value) = args.split(",")
    type = base64.b16decode(type, True)
    ns = qtNamespace()
    if type.startswith(ns):
        type = type[len(ns):]
    type = type.replace("::", "__")
    pos = type.find('<')
    if pos != -1:
        type = type[0:pos]
    expr = base64.b16decode(expr, True)
    value = base64.b16decode(value, True)
    #warn("EDIT: %s %s %s %s: " % (pos, type, expr, value))
    if qqEditable.has_key(type):
        qqEditable[type](expr, value)
    else:
        gdb.execute("set (%s)=%s" % (expr, value))

registerCommand("bbedit", bbedit)


#######################################################################
#
# Frame Command
#
#######################################################################

def bb(args):
    output = 'data=[' + "".join(Dumper(args).output) + '],typeinfo=['
    for typeName, typeInfo in typeInfoCache.iteritems():
        if not typeInfo.reported:
            output += '{name="' + base64.b64encode(typeName)
            output += '",size="' + str(typeInfo.size) + '"},'
            typeInfo.reported = True
    output += ']';
    return output

registerCommand("bb", bb)

def p1(args):
    import cProfile
    cProfile.run('bb("%s")' % args, "/tmp/bbprof")
    import pstats
    pstats.Stats('/tmp/bbprof').sort_stats('time').print_stats()
    return ""

registerCommand("p1", p1)

def p2(args):
    import timeit
    return timeit.repeat('bb("%s")' % args,
        'from __main__ import bb', number=10)

registerCommand("p2", p2)


#######################################################################
#
# The Dumper Class
#
#######################################################################


class Dumper:
    def __init__(self, args):
        self.output = []
        self.currentIName = ""
        self.currentPrintsAddress = True
        self.currentChildType = ""
        self.currentChildNumChild = -1
        self.currentMaxNumChild = -1
        self.currentNumChild = -1
        self.currentValue = None
        self.currentValuePriority = -100
        self.currentValueEncoding = None
        self.currentType = None
        self.currentTypePriority = -100
        self.typeformats = {}
        self.formats = {}
        self.expandedINames = ""

        options = []
        varList = []
        watchers = ""

        resultVarName = ""
        for arg in args.split(' '):
            pos = arg.find(":") + 1
            if arg.startswith("options:"):
                options = arg[pos:].split(",")
            elif arg.startswith("vars:"):
                if len(arg[pos:]) > 0:
                    varList = arg[pos:].split(",")
            elif arg.startswith("resultvarname:"):
                resultVarName = arg[pos:]
            elif arg.startswith("expanded:"):
                self.expandedINames = set(arg[pos:].split(","))
            elif arg.startswith("typeformats:"):
                for f in arg[pos:].split(","):
                    pos = f.find("=")
                    if pos != -1:
                        type = base64.b16decode(f[0:pos], True)
                        self.typeformats[type] = int(f[pos+1:])
            elif arg.startswith("formats:"):
                for f in arg[pos:].split(","):
                    pos = f.find("=")
                    if pos != -1:
                        self.formats[f[0:pos]] = int(f[pos+1:])
            elif arg.startswith("watchers:"):
                watchers = base64.b16decode(arg[pos:], True)