############################################################################ # # 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. # ############################################################################ try: import __builtin__ except: import builtins try: import gdb except: pass import os import os.path import sys import struct import types from dumper import * ####################################################################### # # Infrastructure # ####################################################################### def safePrint(output): try: print(output) except: out = "" for c in output: cc = ord(c) if cc > 127: out += "\\\\%d" % cc elif cc < 0: out += "\\\\%d" % (cc + 256) else: out += c print(out) def registerCommand(name, func): class Command(gdb.Command): def __init__(self): super(Command, self).__init__(name, gdb.COMMAND_OBSCURE) def invoke(self, args, from_tty): safePrint(func(args)) Command() ####################################################################### # # Types # ####################################################################### PointerCode = gdb.TYPE_CODE_PTR # 1 ArrayCode = gdb.TYPE_CODE_ARRAY # 2 StructCode = gdb.TYPE_CODE_STRUCT # 3 UnionCode = gdb.TYPE_CODE_UNION # 4 EnumCode = gdb.TYPE_CODE_ENUM # 5 FlagsCode = gdb.TYPE_CODE_FLAGS # 6 FunctionCode = gdb.TYPE_CODE_FUNC # 7 IntCode = gdb.TYPE_CODE_INT # 8 FloatCode = gdb.TYPE_CODE_FLT # 9, Parts of GDB assume that this means complex. VoidCode = gdb.TYPE_CODE_VOID # 10 #SetCode = gdb.TYPE_CODE_SET # 11 RangeCode = gdb.TYPE_CODE_RANGE # 12 StringCode = gdb.TYPE_CODE_STRING # 13 #BitStringCode = gdb.TYPE_CODE_BITSTRING # -1 #ErrorTypeCode = gdb.TYPE_CODE_ERROR # 14 MethodCode = gdb.TYPE_CODE_METHOD # 15 MethodPointerCode = gdb.TYPE_CODE_METHODPTR # 16 MemberPointerCode = gdb.TYPE_CODE_MEMBERPTR # 17 ReferenceCode = gdb.TYPE_CODE_REF # 18 CharCode = gdb.TYPE_CODE_CHAR # 19 BoolCode = gdb.TYPE_CODE_BOOL # 20 ComplexCode = gdb.TYPE_CODE_COMPLEX # 21 TypedefCode = gdb.TYPE_CODE_TYPEDEF # 22 #NamespaceCode = gdb.TYPE_CODE_NAMESPACE # 23 #Code = gdb.TYPE_CODE_DECFLOAT # 24, Decimal floating point. #Code = gdb.TYPE_CODE_INTERNAL_FUNCTION # 26 ####################################################################### # # Convenience # ####################################################################### # Just convienience for 'python print ...' class PPCommand(gdb.Command): def __init__(self): super(PPCommand, self).__init__("pp", gdb.COMMAND_OBSCURE) def invoke(self, args, from_tty): print(eval(args)) PPCommand() # Just convienience for 'python print gdb.parse_and_eval(...)' class PPPCommand(gdb.Command): def __init__(self): super(PPPCommand, self).__init__("ppp", gdb.COMMAND_OBSCURE) def invoke(self, args, from_tty): print(gdb.parse_and_eval(args)) PPPCommand() def scanStack(p, n): p = int(p) r = [] for i in xrange(n): f = gdb.parse_and_eval("{void*}%s" % p) m = gdb.execute("info symbol %s" % f, to_string=True) if not m.startswith("No symbol matches"): r.append(m) p += f.type.sizeof return r class ScanStackCommand(gdb.Command): def __init__(self): super(ScanStackCommand, self).__init__("scanStack", gdb.COMMAND_OBSCURE) def invoke(self, args, from_tty): if len(args) == 0: args = 20 safePrint(scanStack(gdb.parse_and_eval("$sp"), int(args))) ScanStackCommand() ####################################################################### # # Import plain gdb pretty printers # ####################################################################### class PlainDumper: def __init__(self, printer): self.printer = printer self.typeCache = {} def __call__(self, d, value): try: printer = self.printer.gen_printer(value) except: printer = self.printer.invoke(value) lister = getattr(printer, "children", None) children = [] if lister is None else list(lister()) d.putType(self.printer.name) val = printer.to_string() if isinstance(val, str): d.putValue(val) elif sys.version_info[0] <= 2 and isinstance(val, unicode): d.putValue(val) else: # Assuming LazyString d.putCharArrayHelper(val.address, val.length, val.type) d.putNumChild(len(children)) if d.isExpanded(): with Children(d): for child in children: d.putSubItem(child[0], child[1]) def importPlainDumpers(args): if args == "off": try: gdb.execute("disable pretty-printer .* .*") except: # Might occur in non-ASCII directories warn("COULD NOT DISABLE PRETTY PRINTERS") else: theDumper.importPlainDumpers() registerCommand("importPlainDumpers", importPlainDumpers) class OutputSafer: def __init__(self, d): self.d = d def __enter__(self): self.savedOutput = self.d.output self.d.output = [] def __exit__(self, exType, exValue, exTraceBack): 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 #def couldBePointer(p, align): # typeobj = lookupType("unsigned int") # ptr = gdb.Value(p).cast(typeobj) # 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) Value = gdb.Value ####################################################################### # # The Dumper Class # ####################################################################### class Dumper(DumperBase): def __init__(self): DumperBase.__init__(self) # These values will be kept between calls to 'fetchVariables'. self.isGdb = True self.typeCache = {} self.interpreterBreakpointResolvers = [] def prepare(self, args): self.output = [] self.currentIName = "" self.currentPrintsAddress = True self.currentChildType = "" self.currentChildNumChild = -1 self.currentMaxNumChild = -1 self.currentNumChild = -1 self.currentValue = ReportItem() self.currentType = ReportItem() self.currentAddress = None 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.showQObjectNames = int(args.get("qobjectnames", "0")) self.nativeMixed = int(args.get("nativemixed", "0")) self.autoDerefPointers = int(args.get("autoderef", "0")) 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) # The guess does not need to be updated during a fetchVariables() # as the result is fixed during that time (ignoring "active" # dumpers causing loading of shared objects etc). self.currentQtNamespaceGuess = None def fromNativeDowncastableValue(self, nativeValue): if self.useDynamicType: try: return self.fromNativeValue(nativeValue.cast(nativeValue.dynamic_type)) except: pass return self.fromNativeValue(nativeValue) def fromNativeValue(self, nativeValue): #self.check(isinstance(nativeType, gdb.Value)) val = self.Value(self) val.nativeValue = nativeValue if not nativeValue.address is None: val.laddress = toInteger(nativeValue.address) val.type = self.fromNativeType(nativeValue.type) val.lIsInScope = not nativeValue.is_optimized_out return val def fromNativeType(self, nativeType): self.check(isinstance(nativeType, gdb.Type)) typeobj = self.Type(self) typeobj.nativeType = nativeType.unqualified() typeobj.name = str(typeobj.nativeType) typeobj.lbitsize = nativeType.sizeof * 8 code = nativeType.code typeobj.code = code typeobj.lFunctionType = code in (MethodCode, FunctionCode, MethodPointerCode, MemberPointerCode) typeobj.lPointerType = code == PointerCode typeobj.lReferenceType = code == ReferenceCode typeobj.lIntegralType = code in (BoolCode, CharCode, IntCode) typeobj.lFloatingPointType = code == FloatCode typeobj.lTypedefedType = code == TypedefCode typeobj.lEnumType = code == EnumCode typeobj.lArrayType = code == ArrayCode typeobj.lComplexType = code == ComplexCode return typeobj def fromNativeField(self, nativeField): self.check(isinstance(nativeField, gdb.Field)) field = self.Field(self) field.ltype = self.fromNativeType(nativeField.type) field.parentType = self.fromNativeType(nativeField.parent_type) field.name = nativeField.name field.isBaseClass = nativeField.is_base_class if hasattr(nativeField, 'bitpos'): field.lbitpos = nativeField.bitpos if hasattr(nativeField, 'bitsize') and nativeField.bitsize != 0: field.lbitsize = nativeField.bitsize else: field.lbitsize = 8 * nativeField.type.sizeof return field def nativeValueDereference(self, nativeValue): return self.nativeValueDownCast(nativeValue.dereference()) def nativeValueCast(self, nativeValue, nativeType): try: return self.fromNativeValue(nativeValue.cast(nativeType)) except: return None def nativeValueAddressOf(self, nativeValue): return toInteger(nativeValue.address) def nativeTypeDereference(self, nativeType): return self.fromNativeType(nativeType.strip_typedefs().target()) def nativeTypeUnqualified(self, nativeType): #warn("NATIVE TYPE: %s" % nativeType) return self.fromNativeType(nativeType.unqualified()) def nativeTypePointer(self, nativeType): return self.fromNativeType(nativeType.pointer()) def nativeTypeTarget(self, nativeType): while nativeType.code == TypedefCode: nativeType = nativeType.strip_typedefs().unqualified() return self.fromNativeType(nativeType.target()) def nativeValueHasChildren(self, nativeValue): nativeType = nativeValue.type if nativeType.code == ArrayCode: return True if nativeType.code != StructCode and nativeType.code != UnionCode: return False nativeFields = nativeType.fields() return len(nativeFields) > 0 def nativeTypeFirstBase(self, nativeType): nativeFields = nativeType.fields() if len(nativeFields) and nativeFields[0].is_base_class: return self.fromNativeType(nativeFields[0].type) def nativeTypeFields(self, nativeType): #warn("TYPE: %s" % nativeType) fields = [] if nativeType.code == ArrayCode: # An array. typeobj = nativeType.strip_typedefs() innerType = typeobj.target() for i in xrange(int(typeobj.sizeof / innerType.sizeof)): field = self.Field(self) field.ltype = self.fromNativeType(innerType) field.parentType = self.fromNativeType(nativeType) field.name = None field.isBaseClass = False field.lbitsize = innerType.sizeof field.lbitpos = i * innerType.sizeof * 8 field.arrayIndex = i fields.append(field) return fields if not nativeType.code in (StructCode, UnionCode): return fields nativeIndex = 0 baseIndex = 0 nativeFields = nativeType.fields() #warn("NATIVE FIELDS: %s" % nativeFields) for nativeField in nativeFields: #warn("FIELD: %s" % nativeField) #warn(" DIR: %s" % dir(nativeField)) #warn(" BITSIZE: %s" % nativeField.bitsize) #warn(" ARTIFICIAL: %s" % nativeField.artificial) #warn("FIELD NAME: %s" % nativeField.name) #warn("FIELD TYPE: %s" % nativeField.type) #self.check(isinstance(nativeField, gdb.Field)) field = self.Field(self) field.ltype = self.fromNativeType(nativeField.type) field.parentType = self.fromNativeType(nativeType) field.name = nativeField.name field.isBaseClass = nativeField.is_base_class if hasattr(nativeField, 'bitpos'): field.lbitpos = nativeField.bitpos if hasattr(nativeField, 'bitsize') and nativeField.bitsize != 0: field.lbitsize = nativeField.bitsize else: field.lbitsize = 8 * nativeField.type.sizeof if nativeField.is_base_class: # Field is base type. We cannot use nativeField.name as part # of the iname as it might contain spaces and other # strange characters. field.name = nativeField.name field.baseIndex = baseIndex baseIndex += 1 else: # Since GDB commit b5b08fb4 anonymous structs get also reported # with a 'None' name. if nativeField.name is None or len(nativeField.name) == 0: # Something without a name. # Anonymous union? We need a dummy name to distinguish # multiple anonymous unions in the struct. self.anonNumber += 1 field.name = "#%s" % self.anonNumber else: # Normal named field. field.name = nativeField.name field.nativeIndex = nativeIndex fields.append(field) nativeIndex += 1 #warn("FIELDS: %s" % fields) return fields def nativeTypeStripTypedefs(self, typeobj): typeobj = typeobj.unqualified() while typeobj.code == TypedefCode: typeobj = typeobj.strip_typedefs().unqualified() return self.fromNativeType(typeobj) def nativeValueChildFromField(self, nativeValue, field): #warn("EXTRACTING: %s FROM %s" % (field, nativeValue)) if field.nativeIndex is not None: nativeField = nativeValue.type.fields()[field.nativeIndex] #warn("NATIVE FIELD: %s" % nativeField) if nativeField.is_base_class: return self.fromNativeValue(nativeValue.cast(nativeField.type)) try: # Fails with GDB 7.5. return self.nativeValueDownCast(nativeValue[nativeField]) except: # The generic handling is almost good enough, but does not # downcast the produced values. return None if field.arrayIndex is not None: #warn("IS ARRAY ITEM %s" % field.arrayIndex) if nativeValue.type.code == ArrayCode: typeobj = nativeValue.type.strip_typedefs() innerType = typeobj.target() addr = nativeValue.address + arrayIndex * innerType.sizeof return self.createValue(addr, self.fromNativeType(innerType)) if field.name is not None: return self.nativeValueDownCast(nativeValue[field.name]) error("FIELD EXTARCTION FAILED: %s" % field) return None def listOfLocals(self): frame = gdb.selected_frame() try: block = frame.block() #warn("BLOCK: %s " % block) except RuntimeError as error: #warn("BLOCK IN FRAME NOT ACCESSIBLE: %s" % error) return [] except: warn("BLOCK NOT ACCESSIBLE FOR UNKNOWN REASONS") return [] items = [] shadowed = {} while True: if block is None: warn("UNEXPECTED 'None' BLOCK") break for symbol in block: # Filter out labels etc. if symbol.is_variable or symbol.is_argument: name = symbol.print_name if name == "__in_chrg" or name == "__PRETTY_FUNCTION__": continue # "NotImplementedError: Symbol type not yet supported in # Python scripts." #warn("SYMBOL %s (%s): " % (symbol, name)) if name in shadowed: level = shadowed[name] name1 = "%s@%s" % (name, level) shadowed[name] = level + 1 else: name1 = name shadowed[name] = 1 #warn("SYMBOL %s (%s, %s)): " % (symbol, name, symbol.name)) try: value = self.fromNativeDowncastableValue(frame.read_var(name, block)) #warn("READ 1: %s" % value) value.name = name1 value.iname = "local." + name1 items.append(value) continue except: pass try: #warn("READ 2: %s" % item.value) value = self.fromNativeDowncastableValue(frame.read_var(name)) value.name = name1 value.iname = "local." + name1 items.append(value) continue except: # RuntimeError: happens for # void foo() { std::string s; std::wstring w; } # ValueError: happens for (as of 2010/11/4) # a local struct as found e.g. in # gcc sources in gcc.c, int execute() pass try: #warn("READ 3: %s %s" % (name, item.value)) #warn("ITEM 3: %s" % item.value) value = self.fromNativeDowncastableValue(gdb.parse_and_eval(name)) items.append(value) except: # Can happen in inlined code (see last line of # RowPainter::paintChars(): "RuntimeError: # No symbol \"__val\" in current context.\n" pass # The outermost block in a function has the function member # FIXME: check whether this is guaranteed. if not block.function is None: break block = block.superblock return items # Hack to avoid QDate* dumper timeouts with GDB 7.4 on 32 bit # due to misaligned %ebx in SSE calls (qstring.cpp:findChar) # This seems to be fixed in 7.9 (or earlier) def canCallLocale(self): return False if self.is32bit() else True def fetchVariables(self, args): self.resetStats() self.preping("locals") self.prepare(args) partialVariable = args.get("partialvar", "") isPartial = len(partialVariable) > 0 (ok, res) = self.tryFetchInterpreterVariables(args) if ok: safePrint(res) return # # Locals # self.output.append('data=[') if isPartial: parts = partialVariable.split('.') name = parts[1] try: if parts[0] == 'local': frame = gdb.selected_frame() value = self.fromNativeDowncastableValue(frame.read_var(name)) else: name = self.hexdecode(name) value = self.fromNativeValue(gdb.parse_and_eval(name)) value.iname = parts[0] + '.' + name value.name = name variables = [value] except RuntimeError as error: warn("ERROR: %s" % error) variables = [] except: warn("ERROR") variables = [] else: variables = self.listOfLocals() #warn("VARIAVL: %s" % variables) self.ping("locals") # Take care of the return value of the last function call. if len(self.resultVarName) > 0: try: value = self.parseAndEvaluate(self.resultVarName) value.name = self.resultVarName value.iname = "return." + self.resultVarName variables.append(value) except: # Don't bother. It's only supplementary information anyway. pass for value in variables: with OutputSafer(self): self.anonNumber = 0 if value.iname == "local.argv" and value.type.name == "char **": self.putSpecialArgv(value) else: # A "normal" local variable or parameter. with TopLevelItem(self, value.iname): self.preping("all-" + value.iname) self.put('iname="%s",' % value.iname) self.put('name="%s",' % value.name) self.putItem(value) self.ping("all-" + value.iname) self.preping("watches") with OutputSafer(self): self.handleWatches(args) self.ping("watches") self.output.append('],typeinfo=[') for name in self.typesToReport.keys(): typeobj = self.typesToReport[name] # Happens e.g. for '(anonymous namespace)::InsertDefOperation' #if not typeobj is None: # self.output.append('{name="%s",size="%s"}' # % (self.hexencode(name), typeobj.sizeof)) self.output.append(']') self.typesToReport = {} if self.forceQtNamespace: self.qtNamepaceToReport = self.qtNamespace() if self.qtNamespaceToReport: self.output.append(',qtnamespace="%s"' % self.qtNamespaceToReport) self.qtNamespaceToReport = None self.output.append(',partial="%d"' % isPartial) self.preping('safePrint') safePrint(''.join(self.output)) self.ping('safePrint') safePrint('"%s"' % str(self.dumpStats())) def parseAndEvaluate(self, exp): #warn("EVALUATE '%s'" % exp) try: val = gdb.parse_and_eval(exp) except RuntimeError as error: warn("Cannot evaluate '%s': %s" % (exp, error)) if self.passExceptions: raise error else: return None return self.fromNativeValue(val) def nativeValueAsBytes(self, nativeValue, size): # Assume it's a (backend specific) Value. if nativeValue.address: return self.readRawMemory(nativeValue.address, size) # No address. Possibly the result of an inferior call. # Note: Only a cast to unsigned char[sizeof(origtype)] succeeds # in this situation in gdb. chars = self.lookupNativeType("unsigned char") y = nativeValue.cast(chars.array(0, int(nativeValue.type.sizeof - 1))) buf = bytearray(struct.pack('x' * size)) for i in range(size): buf[i] = int(y[i]) return bytes(buf) def callHelper(self, rettype, value, function, 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, function, arg)) typeName = self.stripClassTag(value.type.name) if typeName.find(":") >= 0: typeName = "'" + typeName + "'" # 'class' is needed, see http://sourceware.org/bugzilla/show_bug.cgi?id=11912 #exp = "((class %s*)%s)->%s(%s)" % (typeName, value.address, function, arg) addr = value.address() if not addr: addr = self.pokeValue(value) #warn("PTR: %s -> %s(%s)" % (value, function, addr)) exp = "((%s*)0x%x)->%s(%s)" % (typeName, addr, function, arg) #warn("CALL: %s" % exp) result = gdb.parse_and_eval(exp) #warn(" -> %s" % result) if not value.address(): gdb.parse_and_eval("free((void*)0x%x)" % addr) return self.fromNativeValue(result) def makeExpression(self, value): typename = "::" + self.stripClassTag(value.type.name) #warn(" TYPE: %s" % typename) exp = "(*(%s*)(0x%x))" % (typename, value.address()) #warn(" EXP: %s" % exp) return exp 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*)(1+$d)))") value = gdb.parse_and_eval("$d").dereference() #warn(" TYPE: %s" % value.type) #warn(" ADDR: %s" % value.address) #warn(" VALUE: %s" % value) return value def nativeTypeTemplateArgument(self, nativeType, position, numeric): #warn("NATIVE TYPE: %s" % dir(nativeType)) arg = nativeType.template_argument(position) if numeric: return int(str(arg)) return self.fromNativeType(arg) def intType(self): self.cachedIntType = self.lookupType('int') self.intType = lambda: self.cachedIntType return self.cachedIntType def charType(self): return self.lookupType('char') def sizetType(self): return self.lookupType('size_t') def charPtrType(self): return self.lookupType('char*') def voidPtrType(self): return self.lookupType('void*') def ptrSize(self): self.cachedPtrSize = self.lookupNativeType('void*').sizeof self.ptrSize = lambda: self.cachedPtrSize return self.cachedPtrSize def pokeValue(self, value): # Allocates inferior memory and copies the contents of value. # Returns a pointer to the copy. # Avoid malloc symbol clash with QVector size = value.type.size() data = value.data() h = self.hexencode(data) #warn("DATA: %s" % h string = ''.join("\\x" + h[2*i:2*i+2] for i in range(size)) exp = '(%s*)memcpy(calloc(%d, 1), "%s", %d)' % (value.type.name, size, string, size) #warn("EXP: %s" % exp) res = gdb.parse_and_eval(exp) #warn("RES: %s" % res) return toInteger(res) def setValue(self, address, typename, value): cmd = "set {%s}%s=%s" % (typename, address, value) gdb.execute(cmd) def setValues(self, address, typename, values): cmd = "set {%s[%s]}%s={%s}" \ % (typename, len(values), address, ','.join(map(str, values))) gdb.execute(cmd) def selectedInferior(self): try: # gdb.Inferior is new in gdb 7.2 self.cachedInferior = gdb.selected_inferior() except: # Pre gdb 7.4. Right now we don't have more than one inferior anyway. self.cachedInferior = gdb.inferiors()[0] # Memoize result. self.selectedInferior = lambda: self.cachedInferior return self.cachedInferior def readRawMemory(self, address, size): return self.selectedInferior().read_memory(address, size) def findStaticMetaObject(self, typename): symbolName = typename + "::staticMetaObject" symbol = gdb.lookup_global_symbol(symbolName, gdb.SYMBOL_VAR_DOMAIN) if not symbol: return 0 try: # Older GDB ~7.4 don't have gdb.Symbol.value() return toInteger(symbol.value().address) except: pass address = gdb.parse_and_eval("&'%s'" % symbolName) return toInteger(address) def put(self, value): self.output.append(value) def childRange(self): if self.currentMaxNumChild is None: return xrange(0, toInteger(self.currentNumChild)) return xrange(min(toInteger(self.currentMaxNumChild), toInteger(self.currentNumChild))) def isArmArchitecture(self): return 'arm' in gdb.TARGET_CONFIG.lower() def isQnxTarget(self): return 'qnx' in gdb.TARGET_CONFIG.lower() def isWindowsTarget(self): # We get i686-w64-mingw32 return 'mingw' in gdb.TARGET_CONFIG.lower() def qtVersionString(self): try: return str(gdb.lookup_symbol("qVersion")[0].value()()) except: pass try: ns = self.qtNamespace() return str(gdb.parse_and_eval("((const char*(*)())'%sqVersion')()" % ns)) except: pass return None def qtVersion(self): try: # Only available with Qt 5.3+ qtversion = int(str(gdb.parse_and_eval("((void**)&qtHookData)[2]")), 16) self.qtVersion = lambda: qtversion return qtversion except: pass try: version = self.qtVersionString() (major, minor, patch) = version[version.find('"')+1:version.rfind('"')].split('.') qtversion = 0x10000 * int(major) + 0x100 * int(minor) + int(patch) self.qtVersion = lambda: qtversion return qtversion except: # Use fallback until we have a better answer. return self.fallbackQtVersion def qtTypeInfoVersion(self): try: # Only available with Qt 5.3+ hookVersion = int(str(gdb.parse_and_eval("((void**)&qtHookData)[0]")), 16) tiVersion = int(str(gdb.parse_and_eval("((void**)&qtHookData)[6]")), 16) #warn("HOOK: %s TI: %s" % (hookVersion, tiVersion)) if hookVersion >= 3: self.qtTypeInfoVersion = lambda: tiVersion return tiVersion except: pass return None def isQt3Support(self): if self.qtVersion() >= 0x050000: return False else: try: # This will fail on Qt 4 without Qt 3 support gdb.execute("ptype QChar::null", to_string=True) self.cachedIsQt3Suport = True except: self.cachedIsQt3Suport = False # Memoize good results. self.isQt3Support = lambda: self.cachedIsQt3Suport return self.cachedIsQt3Suport def simpleEncoding(self, typeobj): code = typeobj.code if code == BoolCode or code == CharCode: return "int:1" if code == IntCode: if str(typeobj).find("unsigned") >= 0: return "uint:%d" % typeobj.size() else: return "int:%d" % typeobj.size() if code == FloatCode: return "float:%d" % typeobj.size() return None def readCString(self, base): inferior = self.selectedInferior() mem = "" while True: char = inferior.read_memory(base, 1)[0] if not char: break mem += char base += 1 return mem def createSpecialBreakpoints(self, args): self.specialBreakpoints = [] def newSpecial(spec): class SpecialBreakpoint(gdb.Breakpoint): def __init__(self, spec): super(SpecialBreakpoint, self).\ __init__(spec, gdb.BP_BREAKPOINT, internal=True) self.spec = spec def stop(self): print("Breakpoint on '%s' hit." % self.spec) return True return SpecialBreakpoint(spec) # FIXME: ns is accessed too early. gdb.Breakpoint() has no # 'rbreak' replacement, and breakpoints created with # 'gdb.execute("rbreak...") cannot be made invisible. # So let's ignore the existing of namespaced builds for this # fringe feature here for now. ns = self.qtNamespace() if args.get('breakonabort', 0): self.specialBreakpoints.append(newSpecial("abort")) if args.get('breakonwarning', 0): self.specialBreakpoints.append(newSpecial(ns + "qWarning")) self.specialBreakpoints.append(newSpecial(ns + "QMessageLogger::warning")) if args.get('breakonfatal', 0): self.specialBreakpoints.append(newSpecial(ns + "qFatal")) self.specialBreakpoints.append(newSpecial(ns + "QMessageLogger::fatal")) #def threadname(self, maximalStackDepth, objectPrivateType): # e = gdb.selected_frame() # out = "" # ns = self.qtNamespace() # while True: # maximalStackDepth -= 1 # if maximalStackDepth < 0: # break # e = e.older() # if e == None or e.name() == None: # break # if e.name() == ns + "QThreadPrivate::start" \ # or e.name() == "_ZN14QThreadPrivate5startEPv@4": # try: # thrptr = e.read_var("thr").dereference() # d_ptr = thrptr["d_ptr"]["d"].cast(objectPrivateType).dereference() # try: # objectName = d_ptr["objectName"] # except: # Qt 5 # p = d_ptr["extraData"] # if not self.isNull(p): # objectName = p.dereference()["objectName"] # if not objectName is None: # (data, size, alloc) = self.stringData(objectName) # if size > 0: # s = self.readMemory(data, 2 * size) # # thread = gdb.selected_thread() # inner = '{valueencoded="uf16:2:0",id="' # inner += str(thread.num) + '",value="' # inner += s # #inner += self.encodeString(objectName) # inner += '"},' # # out += inner # except: # pass # return out def threadnames(self, maximalStackDepth): # FIXME: This needs a proper implementation for MinGW, and only there. # Linux, Mac and QNX mirror the objectName() to the underlying threads, # so we get the names already as part of the -thread-info output. return '[]' #out = '[' #oldthread = gdb.selected_thread() #if oldthread: # try: # objectPrivateType = gdb.lookup_type(ns + "QObjectPrivate").pointer() # inferior = self.selectedInferior() # for thread in inferior.threads(): # thread.switch() # out += self.threadname(maximalStackDepth, objectPrivateType) # except: # pass # oldthread.switch() #return out + ']' def importPlainDumper(self, printer): name = printer.name.replace("::", "__") self.qqDumpers[name] = PlainDumper(printer) self.qqFormats[name] = "" def importPlainDumpers(self): for obj in gdb.objfiles(): for printers in obj.pretty_printers + gdb.pretty_printers: for printer in printers.subprinters: self.importPlainDumper(printer) def qtNamespace(self): if not self.currentQtNamespaceGuess is None: return self.currentQtNamespaceGuess # This only works when called from a valid frame. try: cand = "QArrayData::shared_null" symbol = gdb.lookup_symbol(cand)[0] if symbol: ns = symbol.name[:-len(cand)] self.qtNamespaceToReport = ns self.qtNamespace = lambda: ns return ns except: pass try: # This is Qt, but not 5.x. cand = "QByteArray::shared_null" symbol = gdb.lookup_symbol(cand)[0] if symbol: ns = symbol.name[:-len(cand)] self.qtNamespaceToReport = ns self.qtNamespace = lambda: ns self.fallbackQtVersion = 0x40800 return ns except: pass try: # Last fall backs. s = gdb.execute("ptype QByteArray", to_string=True) if s.find("QMemArray") >= 0: # Qt 3. self.qtNamespaceToReport = "" self.qtNamespace = lambda: "" self.qtVersion = lambda: 0x30308 self.fallbackQtVersion = 0x30308 return "" # Seemingly needed with Debian's GDB 7.4.1 pos1 = s.find("class") pos2 = s.find("QByteArray") if pos1 > -1 and pos2 > -1: ns = s[s.find("class") + 6:s.find("QByteArray")] self.qtNamespaceToReport = ns self.qtNamespace = lambda: ns return ns except: pass self.currentQtNamespaceGuess = "" return "" def assignValue(self, args): typeName = self.hexdecode(args['type']) expr = self.hexdecode(args['expr']) value = self.hexdecode(args['value']) simpleType = int(args['simpleType']) ns = self.qtNamespace() if typeName.startswith(ns): typeName = typeName[len(ns):] typeName = typeName.replace("::", "__") pos = typeName.find('<') if pos != -1: typeName = typeName[0:pos] if typeName in self.qqEditable and not simpleType: #self.qqEditable[typeName](self, expr, value) expr = gdb.parse_and_eval(expr) self.qqEditable[typeName](self, expr, value) else: cmd = "set variable (%s)=%s" % (expr, value) gdb.execute(cmd) def hasVTable(self, typeobj): fields = typeobj.fields() if len(fields) == 0: return False if fields[0].isBaseClass: return hasVTable(fields[0].type) return str(fields[0].type) == "int (**)(void)" def dynamicTypeName(self, value): if self.hasVTable(value.type): #vtbl = str(gdb.parse_and_eval("{int(*)(int)}%s" % int(value.address))) try: # Fails on 7.1 due to the missing to_string. vtbl = gdb.execute("info symbol {int*}%s" % int(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 nativeValueDownCast(self, nativeValue): try: return self.fromNativeValue(nativeValue.cast(nativeValue.dynamic_type)) except: return self.fromNativeValue(nativeValue) def expensiveDowncast(self, value): try: return value.cast(value.dynamic_type) except: pass try: return value.cast(self.lookupType(self.dynamicTypeName(value))) except: pass return value def enumExpression(self, enumType, enumValue): return self.qtNamespace() + "Qt::" + enumValue def lookupType(self, typeName): return self.fromNativeType(self.lookupNativeType(typeName)) def lookupNativeType(self, typeName): nativeType = self.lookupNativeTypeHelper(typeName) if not nativeType is None: self.check(isinstance(nativeType, gdb.Type)) return nativeType def lookupNativeTypeHelper(self, typeName): typeobj = self.typeCache.get(typeName) #warn("LOOKUP 1: %s -> %s" % (typeName, typeobj)) if not typeobj is None: return typeobj if typeName == "void": typeobj = gdb.lookup_type(typeName) self.typeCache[typeName] = typeobj self.typesToReport[typeName] = typeobj return typeobj #try: # typeobj = gdb.parse_and_eval("{%s}&main" % typeName).typeobj # if not typeobj is None: # self.typeCache[typeName] = typeobj # self.typesToReport[typeName] = typeobj # return typeobj #except: # pass # See http://sourceware.org/bugzilla/show_bug.cgi?id=13269 # gcc produces "{anonymous}", gdb "(anonymous namespace)" # "" has been seen too. The only thing gdb # understands when reading things back is "(anonymous namespace)" if typeName.find("{anonymous}") != -1: ts = typeName ts = ts.replace("{anonymous}", "(anonymous namespace)") typeobj = self.lookupNativeType(ts) if not typeobj is None: self.typeCache[typeName] = typeobj self.typesToReport[typeName] = typeobj return typeobj #warn(" RESULT FOR 7.2: '%s': %s" % (typeName, typeobj)) # This part should only trigger for # gdb 7.1 for types with namespace separators. # And anonymous namespaces. ts = typeName 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('*'): typeobj = self.lookupNativeType(ts[0:-1]) if not typeobj is None: typeobj = typeobj.pointer() self.typeCache[typeName] = typeobj self.typesToReport[typeName] = typeobj return typeobj try: #warn("LOOKING UP 1 '%s'" % ts) typeobj = gdb.lookup_type(ts) except RuntimeError as error: #warn("LOOKING UP 2 '%s' ERROR %s" % (ts, error)) # See http://sourceware.org/bugzilla/show_bug.cgi?id=11912 exp = "(class '%s'*)0" % ts try: typeobj = self.parse_and_eval(exp).type.target() #warn("LOOKING UP 3 '%s'" % typeobj) except: # Can throw "RuntimeError: No type named class Foo." pass except: #warn("LOOKING UP '%s' FAILED" % ts) pass if not typeobj is None: #warn("CACHING: %s" % typeobj) self.typeCache[typeName] = typeobj self.typesToReport[typeName] = typeobj # This could still be None as gdb.lookup_type("char[3]") generates # "RuntimeError: No type named char[3]" #self.typeCache[typeName] = typeobj #self.typesToReport[typeName] = typeobj return typeobj def doContinue(self): gdb.execute('continue') def fetchStack(self, args): def fromNativePath(str): return str.replace('\\', '/') limit = int(args['limit']) if limit <= 0: limit = 10000 self.prepare(args) self.output = [] frame = gdb.newest_frame() i = 0 self.currentCallContext = None while i < limit and frame: with OutputSafer(self): name = frame.name() functionName = "??" if name is None else name fileName = "" objfile = "" symtab = "" pc = frame.pc() sal = frame.find_sal() line = -1 if sal: line = sal.line symtab = sal.symtab if not symtab is None: objfile = fromNativePath(symtab.objfile.filename) fullname = symtab.fullname() if fullname is None: fileName = "" else: fileName = fromNativePath(fullname) if self.nativeMixed and functionName == "qt_qmlDebugMessageAvailable": interpreterStack = self.extractInterpreterStack() #print("EXTRACTED INTEPRETER STACK: %s" % interpreterStack) for interpreterFrame in interpreterStack.get('frames', []): function = interpreterFrame.get('function', '') fileName = interpreterFrame.get('file', '') language = interpreterFrame.get('language', '') lineNumber = interpreterFrame.get('line', 0) context = interpreterFrame.get('context', 0) self.put(('frame={function="%s",file="%s",' 'line="%s",language="%s",context="%s"}') % (function, fileName, lineNumber, language, context)) if False and self.isInternalInterpreterFrame(functionName): frame = frame.older() self.put(('frame={address="0x%x",function="%s",' 'file="%s",line="%s",' 'module="%s",language="c",usable="0"}') % (pc, functionName, fileName, line, objfile)) i += 1 frame = frame.older() continue self.put(('frame={level="%s",address="0x%x",function="%s",' 'file="%s",line="%s",module="%s",language="c"}') % (i, pc, functionName, fileName, line, objfile)) frame = frame.older() i += 1 safePrint('frames=[' + ','.join(self.output) + ']') def createResolvePendingBreakpointsHookBreakpoint(self, args): class Resolver(gdb.Breakpoint): def __init__(self, dumper, args): self.dumper = dumper self.args = args spec = "qt_qmlDebugConnectorOpen" super(Resolver, self).\ __init__(spec, gdb.BP_BREAKPOINT, internal=True, temporary=False) def stop(self): self.dumper.resolvePendingInterpreterBreakpoint(args) self.enabled = False return False self.interpreterBreakpointResolvers.append(Resolver(self, args)) def exitGdb(self, _): gdb.execute("quit") def loadDumpers(self, args): print(self.setupDumpers()) def profile1(self, args): """Internal profiling""" import tempfile import cProfile tempDir = tempfile.gettempdir() + "/bbprof" cProfile.run('theDumper.fetchVariables(%s)' % args, tempDir) import pstats pstats.Stats(tempDir).sort_stats('time').print_stats() def profile2(self, args): import timeit print(timeit.repeat('theDumper.fetchVariables(%s)' % args, 'from __main__ import theDumper', number=10)) class CliDumper(Dumper): def __init__(self): Dumper.__init__(self) self.childrenPrefix = '[' self.chidrenSuffix = '] ' self.indent = 0 self.isCli = True def reportDumpers(self, msg): return msg def put(self, line): if self.output.endswith('\n'): self.output = self.output[0:-1] self.output += line def putNumChild(self, numchild): pass def putOriginalAddress(self, value): pass def fetchVariables(self, args): args['fancy'] = 1 args['passexception'] = 1 args['autoderef'] = 1 args['qobjectnames'] = 1 name = args['varlist'] self.prepare(args) self.output = name + ' = ' frame = gdb.selected_frame() value = frame.read_var(name) with TopLevelItem(self, name): self.putItem(value) return self.output # Global instance. #if gdb.parameter('height') is None: theDumper = Dumper() #else: # import codecs # theDumper = CliDumper() ###################################################################### # # ThreadNames Command # ####################################################################### def threadnames(arg): return theDumper.threadnames(int(arg)) registerCommand("threadnames", threadnames) ####################################################################### # # Native Mixed # ####################################################################### class InterpreterMessageBreakpoint(gdb.Breakpoint): def __init__(self): spec = "qt_qmlDebugMessageAvailable" super(InterpreterMessageBreakpoint, self).\ __init__(spec, gdb.BP_BREAKPOINT, internal=True) def stop(self): print("Interpreter event received.") return theDumper.handleInterpreterMessage() InterpreterMessageBreakpoint()