try: import __builtin__ except: import builtins try: import gdb except: pass import os import os.path import sys import struct def warn(message): print("XXX: %s\n" % message.encode("latin1")) from dumper import * from qttypes import * from stdtypes import * from misctypes import * from boosttypes import * from creatortypes import * ####################################################################### # # Infrastructure # ####################################################################### def savePrint(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): savePrint(func(args)) Command() def listOfLocals(varList): 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: 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)) item = LocalItem() item.iname = "local." + name1 item.name = name1 try: item.value = frame.read_var(name, block) #warn("READ 1: %s" % item.value) if not item.value.is_optimized_out: #warn("ITEM 1: %s" % item.value) items.append(item) continue except: pass try: item.value = frame.read_var(name) #warn("READ 2: %s" % item.value) if not item.value.is_optimized_out: #warn("ITEM 2: %s" % item.value) items.append(item) 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)) item.value = gdb.parse_and_eval(name) #warn("ITEM 3: %s" % item.value) items.append(item) 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 ####################################################################### # # Types # ####################################################################### PointerCode = gdb.TYPE_CODE_PTR ArrayCode = gdb.TYPE_CODE_ARRAY StructCode = gdb.TYPE_CODE_STRUCT UnionCode = gdb.TYPE_CODE_UNION EnumCode = gdb.TYPE_CODE_ENUM FlagsCode = gdb.TYPE_CODE_FLAGS FunctionCode = gdb.TYPE_CODE_FUNC IntCode = gdb.TYPE_CODE_INT FloatCode = gdb.TYPE_CODE_FLT # Parts of GDB assume that this means complex. VoidCode = gdb.TYPE_CODE_VOID #SetCode = gdb.TYPE_CODE_SET RangeCode = gdb.TYPE_CODE_RANGE StringCode = gdb.TYPE_CODE_STRING #BitStringCode = gdb.TYPE_CODE_BITSTRING #ErrorTypeCode = gdb.TYPE_CODE_ERROR MethodCode = gdb.TYPE_CODE_METHOD MethodPointerCode = gdb.TYPE_CODE_METHODPTR MemberPointerCode = gdb.TYPE_CODE_MEMBERPTR ReferenceCode = gdb.TYPE_CODE_REF CharCode = gdb.TYPE_CODE_CHAR BoolCode = gdb.TYPE_CODE_BOOL ComplexCode = gdb.TYPE_CODE_COMPLEX TypedefCode = gdb.TYPE_CODE_TYPEDEF NamespaceCode = gdb.TYPE_CODE_NAMESPACE #Code = gdb.TYPE_CODE_DECFLOAT # Decimal floating point. #Code = gdb.TYPE_CODE_MODULE # Fortran #Code = gdb.TYPE_CODE_INTERNAL_FUNCTION ####################################################################### # # 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 savePrint(scanStack(gdb.parse_and_eval("$sp"), int(args))) ScanStackCommand() def bbsetup(args = ''): print(theDumper.bbsetup()) registerCommand("bbsetup", bbsetup) ####################################################################### # # Import plain gdb pretty printers # ####################################################################### class PlainDumper: def __init__(self, printer): self.printer = printer def __call__(self, d, value): 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().encode("hex") d.putValue(val, Hex2EncodedLatin1) d.putValue(printer.to_string()) d.putNumChild(len(children)) if d.isExpanded(): with Children(d): for child in children: d.putSubItem(child[0], child[1]) def importPlainDumpers(args): 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): # 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) Value = gdb.Value def stripTypedefs(typeobj): typeobj = typeobj.unqualified() while typeobj.code == TypedefCode: typeobj = typeobj.strip_typedefs().unqualified() return typeobj ####################################################################### # # LocalItem # ####################################################################### # Contains iname, name, and value. class LocalItem: pass ####################################################################### # # Edit Command # ####################################################################### def bbedit(args): theDumper.bbedit(args) registerCommand("bbedit", bbedit) ####################################################################### # # Frame Command # ####################################################################### def bb(args): try: print(theDumper.run(args)) except: import traceback traceback.print_exc() registerCommand("bb", bb) ####################################################################### # # The Dumper Class # ####################################################################### class Dumper(DumperBase): def __init__(self): DumperBase.__init__(self) # These values will be kept between calls to 'run'. self.isGdb = True self.childEventAddress = None self.typesReported = {} self.typesToReport = {} self.qtNamespaceToReport = None def run(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.typeformats = {} self.formats = {} self.useDynamicType = True self.expandedINames = {} # The guess does not need to be updated during a run() # as the result is fixed during that time (ignoring "active" # dumpers causing loading of shared objects etc). self.currentQtNamespaceGuess = None watchers = "" resultVarName = "" options = [] varList = [] self.output.append('data=[') 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("stringcutoff:"): self.stringCutOff = int(arg[pos:]) elif arg.startswith("displaystringlimit:"): self.displayStringLimit = int(arg[pos:]) elif arg.startswith("typeformats:"): for f in arg[pos:].split(","): pos = f.find("=") if pos != -1: typeName = self.hexdecode(f[0:pos]) self.typeformats[typeName] = 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 = self.hexdecode(arg[pos:]) self.useDynamicType = "dyntype" in options self.useFancy = "fancy" in options self.forceQtNamespace = "forcens" in options self.passExceptions = "pe" in options #self.passExceptions = True self.autoDerefPointers = "autoderef" in options self.partialUpdate = "partial" in options self.tooltipOnly = "tooltiponly" in options self.fallbackQtVersion = 0x50200 #warn("NAMESPACE: '%s'" % self.qtNamespace()) #warn("VARIABLES: %s" % varList) #warn("EXPANDED INAMES: %s" % self.expandedINames) #warn("WATCHERS: %s" % watchers) #warn("PARTIAL: %s" % self.partialUpdate) # # Locals # locals = [] fullUpdateNeeded = True if self.partialUpdate and len(varList) == 1 and not self.tooltipOnly: #warn("PARTIAL: %s" % varList) parts = varList[0].split('.') #warn("PARTIAL PARTS: %s" % parts) name = parts[1] #warn("PARTIAL VAR: %s" % name) #fullUpdateNeeded = False try: frame = gdb.selected_frame() item = LocalItem() item.iname = "local." + name item.name = name item.value = frame.read_var(name) locals = [item] #warn("PARTIAL LOCALS: %s" % locals) fullUpdateNeeded = False except: pass varList = [] if fullUpdateNeeded and not self.tooltipOnly: locals = listOfLocals(varList) # Take care of the return value of the last function call. if len(resultVarName) > 0: try: item = LocalItem() item.name = resultVarName item.iname = "return." + resultVarName item.value = self.parseAndEvaluate(resultVarName) locals.append(item) except: # Don't bother. It's only supplementary information anyway. pass for item in locals: value = self.downcast(item.value) if self.useDynamicType else item.value with OutputSafer(self): self.anonNumber = -1 if item.iname == "local.argv" and str(value.type) == "char **": self.putSpecialArgv(value) else: # A "normal" local variable or parameter. with TopLevelItem(self, item.iname): self.put('iname="%s",' % item.iname) self.put('name="%s",' % item.name) self.putItem(value) # # Watchers # with OutputSafer(self): if len(watchers) > 0: for watcher in watchers.split("##"): (exp, iname) = watcher.split("#") self.handleWatch(exp, exp, iname) #print('data=[' + locals + sep + watchers + ']\n') 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 "forcens" in options: self.qtNamepaceToRport = self.qtNamespace() if self.qtNamespaceToReport: self.output.append(',qtnamespace="%s"' % self.qtNamespaceToReport) self.qtNamespaceToReport = None return "".join(self.output) def enterSubItem(self, item): if not item.iname: item.iname = "%s.%s" % (self.currentIName, item.name) #warn("INAME %s" % item.iname) self.put('{') #if not item.name is None: if isinstance(item.name, str): self.put('name="%s",' % item.name) item.savedIName = self.currentIName item.savedValue = self.currentValue item.savedType = self.currentType item.savedCurrentAddress = self.currentAddress self.currentIName = item.iname self.currentValue = ReportItem(); self.currentType = ReportItem(); self.currentAddress = None 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.putNumChild(0) self.putValue("") try: if self.currentType.value: typeName = stripClassTag(self.currentType.value) if len(typeName) > 0 and typeName != self.currentChildType: self.put('type="%s",' % typeName) # str(type.unqualified()) ? if self.currentValue.value is None: self.put('value="",numchild="0",') else: if not self.currentValue.encoding is None: self.put('valueencoded="%d",' % self.currentValue.encoding) if self.currentValue.elided: self.put('valueelided="%d",' % self.currentValue.elided) self.put('value="%s",' % self.currentValue.value) except: pass if not self.currentAddress is None: self.put(self.currentAddress) self.put('},') self.currentIName = item.savedIName self.currentValue = item.savedValue self.currentType = item.savedType self.currentAddress = item.savedCurrentAddress return True def parseAndEvaluate(self, exp): return gdb.parse_and_eval(exp) def callHelper(self, 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)) typeName = stripClassTag(str(value.type)) 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, func, arg) ptr = value.address if value.address else self.pokeValue(value) exp = "((%s*)%s)->%s(%s)" % (typeName, ptr, func, arg) #warn("CALL: %s" % exp) result = gdb.parse_and_eval(exp) #warn(" -> %s" % result) if not value.address: gdb.parse_and_eval("free(0x%x)" % ptr) return result def childWithName(self, value, name): try: return value[name] except: return None def makeValue(self, type, init): type = "::" + stripClassTag(str(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 = gdb.parse_and_eval("$d").dereference() #warn(" TYPE: %s" % value.type) #warn(" ADDR: %s" % value.address) #warn(" VALUE: %s" % value) return value def makeExpression(self, value): type = "::" + stripClassTag(str(value.type)) #warn(" TYPE: %s" % type) #exp = "(*(%s*)(&%s))" % (type, value.address) exp = "(*(%s*)(%s))" % (type, 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 childAt(self, value, index): field = value.type.fields()[index] if len(field.name): try: return value[field.name] except: return value.cast(field.type) # FIXME: Cheat. There seems to be no official way to access # the real item, so we pass back the value. That at least # enables later ...["name"] style accesses as gdb handles # them transparently. return value def fieldAt(self, type, index): return type.fields()[index] def simpleValue(self, value): return str(value) def directBaseClass(self, typeobj, index = 0): for f in typeobj.fields(): if f.is_base_class: if index == 0: return f.type index -= 1; return None def directBaseObject(self, value, index = 0): for f in value.type.fields(): if f.is_base_class: if index == 0: return value.cast(f.type) index -= 1; return None def checkPointer(self, p, align = 1): if not self.isNull(p): p.dereference() def pointerValue(self, p): return toInteger(p) def isNull(self, 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(self.lookupType("void").pointer()) == 0 #except: # return False try: # Can fail with: "RuntimeError: Cannot access memory at address 0x5" return toInteger(p) == 0 except: return False def templateArgument(self, typeobj, position): try: # This fails on stock 7.2 with # "RuntimeError: No type named myns::QObject.\n" return typeobj.template_argument(position) except: # That's something like "myns::QList<...>" return self.lookupType(self.extractTemplateArgument(str(typeobj.strip_typedefs()), position)) def numericTemplateArgument(self, typeobj, position): # Workaround for gdb < 7.1 try: return int(typeobj.template_argument(position)) except RuntimeError as error: # ": No type named 30." msg = str(error) msg = msg[14:-1] # gdb at least until 7.4 produces for std::array # for template_argument(1): RuntimeError: No type named 4u. if msg[-1] == 'u': msg = msg[0:-1] return int(msg) 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 addressOf(self, value): return toInteger(value.address) def createPointerValue(self, address, pointeeType): # This might not always work: # a Python 3 based GDB due to the bug addressed in # https://sourceware.org/ml/gdb-patches/2013-09/msg00571.html try: return gdb.Value(address).cast(pointeeType.pointer()) except: # Try _some_ fallback (good enough for the std::complex dumper) return gdb.parse_and_eval("(%s*)%s" % (pointeeType, address)) def intSize(self): return 4 def ptrSize(self): self.cachedPtrSize = self.lookupType('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.sizeof data = value.cast(gdb.lookup_type("unsigned char").array(0, int(size - 1))) string = ''.join("\\x%02x" % int(data[i]) for i in range(size)) exp = '(%s*)memcpy(calloc(%s, 1), "%s", %s)' % (value.type, size, string, size) #warn("EXP: %s" % exp) return toInteger(gdb.parse_and_eval(exp)) def createValue(self, address, referencedType): try: return gdb.Value(address).cast(referencedType.pointer()).dereference() except: # Try _some_ fallback (good enough for the std::complex dumper) return gdb.parse_and_eval("{%s}%s" % (referencedType, address)) def setValue(self, address, type, value): cmd = "set {%s}%s=%s" % (type, address, value) gdb.execute(cmd) def setValues(self, address, type, values): cmd = "set {%s[%s]}%s={%s}" \ % (type, 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, addr, size): mem = self.selectedInferior().read_memory(addr, size) if sys.version_info[0] >= 3: mem.tobytes() return mem def extractInt64(self, addr): return struct.unpack("q", self.readRawMemory(addr, 8))[0] def extractInt(self, addr): return struct.unpack("i", self.readRawMemory(addr, 4))[0] def extractByte(self, addr): return struct.unpack("b", self.readRawMemory(addr, 1))[0] def findStaticMetaObject(self, typeName): return self.findSymbol(typeName + "::staticMetaObject") def findSymbol(self, symbolName): try: result = gdb.lookup_global_symbol(symbolName) return result.value() if result else 0 except: pass # Older GDB ~7.4 try: address = gdb.parse_and_eval("&'%s'" % symbolName) type = gdb.lookup_type(self.qtNamespace() + "QMetaObject") return self.createPointerValue(address, type) except: return 0 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: 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 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 putAddress(self, addr): if self.currentPrintsAddress: try: # addr can be "None", int(None) fails. #self.put('addr="0x%x",' % int(addr)) self.currentAddress = 'addr="0x%x",' % toInteger(addr) except: pass def putNumChild(self, numchild): #warn("NUM CHILD: '%s' '%s'" % (numchild, self.currentChildNumChild)) if numchild != self.currentChildNumChild: self.put('numchild="%s",' % numchild) def putSimpleValue(self, value, encoding = None, priority = 0): self.putValue(value, encoding, priority) def putPointerValue(self, value): # Use a lower priority if value is None: self.putEmptyValue(-1) else: self.putValue("0x%x" % value.cast( self.lookupType("unsigned long")), None, -1) def isExpandedSubItem(self, component): iname = "%s.%s" % (self.currentIName, component) #warn("IS EXPANDED: %s in %s" % (iname, self.expandedINames)) return iname in self.expandedINames def stripNamespaceFromType(self, typeName): type = stripClassTag(typeName) ns = self.qtNamespace() if len(ns) > 0 and type.startswith(ns): type = type[len(ns):] pos = type.find("<") # FIXME: make it recognize foo::bar::iterator? while pos != -1: pos1 = type.rfind(">", pos) type = type[0:pos] + type[pos1+1:] pos = type.find("<") return type def isMovableType(self, type): if type.code == PointerCode: return True if self.isSimpleType(type): return True return self.isKnownMovableType(self.stripNamespaceFromType(str(type))) def putSubItem(self, component, value, tryDynamic=True): with SubItem(self, component): self.putItem(value, tryDynamic) def isSimpleType(self, typeobj): code = typeobj.code return code == BoolCode \ or code == CharCode \ or code == IntCode \ or code == FloatCode \ or code == EnumCode def simpleEncoding(self, typeobj): code = typeobj.code if code == BoolCode or code == CharCode: return Hex2EncodedInt1 if code == IntCode: if str(typeobj).find("unsigned") >= 0: if typeobj.sizeof == 1: return Hex2EncodedUInt1 if typeobj.sizeof == 2: return Hex2EncodedUInt2 if typeobj.sizeof == 4: return Hex2EncodedUInt4 if typeobj.sizeof == 8: return Hex2EncodedUInt8 else: if typeobj.sizeof == 1: return Hex2EncodedInt1 if typeobj.sizeof == 2: return Hex2EncodedInt2 if typeobj.sizeof == 4: return Hex2EncodedInt4 if typeobj.sizeof == 8: return Hex2EncodedInt8 if code == FloatCode: if typeobj.sizeof == 4: return Hex2EncodedFloat4 if typeobj.sizeof == 8: return Hex2EncodedFloat8 return None def isReferenceType(self, typeobj): return typeobj.code == gdb.TYPE_CODE_REF def isStructType(self, typeobj): return typeobj.code == gdb.TYPE_CODE_STRUCT def isFunctionType(self, type): return type.code == MethodCode or type.code == FunctionCode def putItem(self, value, tryDynamic=True): if value is None: # Happens for non-available watchers in gdb versions that # need to use gdb.execute instead of gdb.parse_and_eval self.putValue("") self.putType("") self.putNumChild(0) return type = value.type.unqualified() typeName = str(type) tryDynamic &= self.useDynamicType self.addToCache(type) # Fill type cache if tryDynamic: self.putAddress(value.address) # FIXME: Gui shows references stripped? #warn(" ") #warn("REAL INAME: %s " % self.currentIName) #warn("REAL TYPE: %s " % value.type) #warn("REAL CODE: %s " % value.type.code) #warn("REAL VALUE: %s " % value) if type.code == ReferenceCode: try: # Try to recognize null references explicitly. if toInteger(value.address) == 0: self.putValue("") self.putType(typeName) self.putNumChild(0) return except: pass if tryDynamic: try: # Dynamic references are not supported by gdb, see # http://sourceware.org/bugzilla/show_bug.cgi?id=14077. # Find the dynamic type manually using referenced_type. value = value.referenced_value() value = value.cast(value.dynamic_type) self.putItem(value) self.putBetterType("%s &" % value.type) return except: pass try: # FIXME: This throws "RuntimeError: Attempt to dereference a # generic pointer." with MinGW's gcc 4.5 when it "identifies" # a "QWidget &" as "void &" and with optimized out code. self.putItem(value.cast(type.target().unqualified())) self.putBetterType("%s &" % self.currentType.value) return except RuntimeError: self.putValue("") self.putType(typeName) self.putNumChild(0) return if type.code == IntCode or type.code == CharCode: self.putType(typeName) if value.is_optimized_out: self.putValue("") elif type.sizeof == 1: # Force unadorned value transport for char and Co. self.putValue(int(value) & 0xff) else: self.putValue(value) self.putNumChild(0) return if type.code == FloatCode or type.code == BoolCode: self.putType(typeName) if value.is_optimized_out: self.putValue("") else: self.putValue(value) self.putNumChild(0) return if type.code == EnumCode: self.putType(typeName) if value.is_optimized_out: self.putValue("") else: self.putValue("%s (%d)" % (value, value)) self.putNumChild(0) return if type.code == ComplexCode: self.putType(typeName) if value.is_optimized_out: self.putValue("") else: self.putValue("%s" % value) self.putNumChild(0) return if type.code == TypedefCode: if typeName in self.qqDumpers: self.putType(typeName) self.qqDumpers[typeName](self, value) return type = stripTypedefs(type) # The cast can destroy the address? #self.putAddress(value.address) # Workaround for http://sourceware.org/bugzilla/show_bug.cgi?id=13380 if type.code == ArrayCode: value = self.parseAndEvaluate("{%s}%s" % (type, value.address)) else: try: value = value.cast(type) except: self.putValue("") self.putType(typeName) self.putNumChild(0) return self.putItem(value) self.putBetterType(typeName) return if type.code == ArrayCode: self.putCStyleArray(value) return if type.code == PointerCode: # This could still be stored in a register and # potentially dereferencable. if value.is_optimized_out: self.putValue("") return self.putFormattedPointer(value) return if type.code == MethodPointerCode \ or type.code == MethodCode \ or type.code == FunctionCode \ or type.code == MemberPointerCode: self.putType(typeName) self.putValue(value) self.putNumChild(0) return if typeName.startswith("= 1): self.putType(typeName) nsStrippedType = self.stripNamespaceFromType(typeName)\ .replace("::", "__") # 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 if nsStrippedType.startswith("_AArray_"): qdump_AArray(self, value) return #warn(" STRIPPED: %s" % nsStrippedType) #warn(" DUMPERS: %s" % self.qqDumpers) #warn(" DUMPERS: %s" % (nsStrippedType in self.qqDumpers)) dumper = self.qqDumpers.get(nsStrippedType, None) if not dumper is None: if tryDynamic: dumper(self, self.expensiveDowncast(value)) else: dumper(self, value) return # D arrays, gdc compiled. if typeName.endswith("[]"): n = value["length"] base = value["ptr"] self.putType(typeName) self.putItemCount(n) if self.isExpanded(): self.putArrayData(base.type.target(), base, n) return #warn("GENERIC STRUCT: %s" % type) #warn("INAME: %s " % self.currentIName) #warn("INAMES: %s " % self.expandedINames) #warn("EXPANDED: %s " % (self.currentIName in self.expandedINames)) staticMetaObject = self.extractStaticMetaObject(value.type) if staticMetaObject: self.putQObjectNameValue(value) self.putType(typeName) self.putEmptyValue() self.putNumChild(len(type.fields())) if self.currentIName in self.expandedINames: innerType = None with Children(self, 1, childType=innerType): self.putFields(value) if staticMetaObject: self.putQObjectGuts(value, staticMetaObject) def toBlob(self, value): size = toInteger(value.type.sizeof) if value.address: return self.extractBlob(value.address, size) # No address. Possibly the result of an inferior call. y = value.cast(gdb.lookup_type("unsigned char").array(0, int(size - 1))) buf = bytearray(struct.pack('x' * size)) for i in range(size): buf[i] = int(y[i]) return Blob(bytes(buf)) def extractBlob(self, base, size): inferior = self.selectedInferior() return Blob(inferior.read_memory(base, size)) 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 #if sys.version_info[0] >= 3: # return mem.tobytes() return mem def putFields(self, value, dumpBase = True): fields = value.type.fields() #warn("TYPE: %s" % type) #warn("FIELDS: %s" % fields) baseNumber = 0 for field in fields: #warn("FIELD: %s" % field) #warn(" BITSIZE: %s" % field.bitsize) #warn(" ARTIFICIAL: %s" % field.artificial) if field.name is None: type = stripTypedefs(value.type) innerType = type.target() p = value.cast(innerType.pointer()) for i in xrange(int(type.sizeof / innerType.sizeof)): with SubItem(self, i): self.putItem(p.dereference()) p = p + 1 continue # Ignore vtable pointers for virtual inheritance. if field.name.startswith("_vptr."): with SubItem(self, "[vptr]"): # int (**)(void) n = 100 self.putType(" ") self.putValue(value[field.name]) self.putNumChild(n) if self.isExpanded(): with Children(self): p = value[field.name] for i in xrange(n): if toInteger(p.dereference()) != 0: with SubItem(self, i): self.putItem(p.dereference()) self.putType(" ") p = p + 1 continue #warn("FIELD NAME: %s" % field.name) #warn("FIELD TYPE: %s" % field.type) if field.is_base_class: # Field is base type. We cannot use field.name as part # of the iname as it might contain spaces and other # strange characters. if dumpBase: baseNumber += 1 with UnnamedSubItem(self, "@%d" % baseNumber): baseValue = value.cast(field.type) self.put('iname="%s",' % self.currentIName) self.put('name="[%s]",' % field.name) self.putAddress(baseValue.address) self.putItem(baseValue, False) elif len(field.name) == 0: # Anonymous union. We need a dummy name to distinguish # multiple anonymous unions in the struct. self.anonNumber += 1 self.listAnonymous(value, "#%d" % self.anonNumber, field.type) else: # Named field. with SubItem(self, field.name): #bitsize = getattr(field, "bitsize", None) #if not bitsize is None: # self.put("bitsize=\"%s\"" % bitsize) self.putItem(self.downcast(value[field.name])) def listAnonymous(self, value, name, type): for field in type.fields(): #warn("FIELD NAME: %s" % field.name) if len(field.name) > 0: with SubItem(self, field.name): self.putItem(value[field.name]) else: # Further nested. self.anonNumber += 1 name = "#%d" % self.anonNumber #iname = "%s.%s" % (selitem.iname, name) #child = SameItem(item.value, iname) with SubItem(self, name): self.put('name="%s",' % name) self.putEmptyValue() fieldTypeName = str(field.type) if fieldTypeName.endswith(""): self.putType("") elif fieldTypeName.endswith(""): self.putType("") else: self.putType(fieldTypeName) with Children(self, 1): self.listAnonymous(value, name, field.type) def registerDumper(self, funcname, function): try: #warn("FUNCTION: %s " % funcname) #funcname = function.func_name if funcname.startswith("qdump__"): type = funcname[7:] self.qqDumpers[type] = function self.qqFormats[type] = self.qqFormats.get(type, "") elif funcname.startswith("qform__"): type = funcname[7:] formats = "" try: formats = function() except: pass self.qqFormats[type] = formats elif funcname.startswith("qedit__"): type = funcname[7:] try: self.qqEditable[type] = function except: pass except: pass def bbsetup(self): self.qqDumpers = {} self.qqFormats = {} self.qqEditable = {} self.typeCache = {} # It's __main__ from gui, gdbbridge from test. Brush over it... for modname in ['__main__', 'gdbbridge']: dic = sys.modules[modname].__dict__ for name in dic.keys(): self.registerDumper(name, dic[name]) result = "dumpers=[" for key, value in self.qqFormats.items(): if key in self.qqEditable: result += '{type="%s",formats="%s",editable="true"},' % (key, value) else: result += '{type="%s",formats="%s"},' % (key, value) result += ']' return result #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="'; # inner += str(Hex4EncodedLittleEndianWithoutQuotes)+'",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 self.currentQtNamespaceGuess = "" return "" def bbedit(self, args): (typeName, expr, data) = args.split(',') d = Dumper() typeName = d.hexdecode(typeName) ns = self.qtNamespace() if typeName.startswith(ns): typeName = typeName[len(ns):] typeName = typeName.replace("::", "__") pos = typeName.find('<') if pos != -1: typeName = typeName[0:pos] expr = d.hexdecode(expr) data = d.hexdecode(data) if typeName in self.qqEditable: #self.qqEditable[typeName](self, expr, data) value = gdb.parse_and_eval(expr) self.qqEditable[typeName](self, value, data) else: cmd = "set variable (%s)=%s" % (expr, data) gdb.execute(cmd) def hasVTable(self, type): fields = type.fields() if len(fields) == 0: return False if fields[0].is_base_class: 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 downcast(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 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 addToCache(self, type): typename = str(type) if typename in self.typesReported: return self.typesReported[typename] = True self.typesToReport[typename] = type def enumExpression(self, enumType, enumValue): return self.qtNamespace() + "Qt::" + enumValue def lookupType(self, typestring): type = self.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) self.typeCache[typestring] = type self.typesToReport[typestring] = type return type #try: # type = gdb.parse_and_eval("{%s}&main" % typestring).type # if not type is None: # self.typeCache[typestring] = type # self.typesToReport[typestring] = type # return type #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 typestring.find("{anonymous}") != -1: ts = typestring ts = ts.replace("{anonymous}", "(anonymous namespace)") type = self.lookupType(ts) if not type is None: self.typeCache[typestring] = type self.typesToReport[typestring] = type return type #warn(" RESULT FOR 7.2: '%s': %s" % (typestring, type)) # This part should only trigger for # gdb 7.1 for types with namespace separators. # And anonymous namespaces. 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 = self.lookupType(ts[0:-1]) if not type is None: type = type.pointer() self.typeCache[typestring] = type self.typesToReport[typestring] = type return type try: #warn("LOOKING UP '%s'" % ts) type = gdb.lookup_type(ts) except RuntimeError as error: #warn("LOOKING UP '%s': %s" % (ts, error)) # See http://sourceware.org/bugzilla/show_bug.cgi?id=11912 exp = "(class '%s'*)0" % ts try: type = self.parseAndEvaluate(exp).type.target() except: # Can throw "RuntimeError: No type named class Foo." pass except: #warn("LOOKING UP '%s' FAILED" % ts) pass if not type is None: self.typeCache[typestring] = type self.typesToReport[typestring] = type return type # This could still be None as gdb.lookup_type("char[3]") generates # "RuntimeError: No type named char[3]" self.typeCache[typestring] = type self.typesToReport[typestring] = type return type # Global instance. theDumper = Dumper() ####################################################################### # # Internal profiling # ####################################################################### def p1(args): import tempfile import cProfile tempDir = tempfile.gettempdir() + "/bbprof" cProfile.run('bb("%s")' % args, tempDir) import pstats pstats.Stats(tempDir).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) def profileit(args): eval(args) def profile(args): import timeit return timeit.repeat('profileit("%s")' % args, 'from __main__ import profileit', number=10000) registerCommand("pp", profile) ####################################################################### # # ThreadNames Command # ####################################################################### def threadnames(arg): return theDumper.threadnames(int(arg)) registerCommand("threadnames", threadnames) ####################################################################### # # Mixed C++/Qml debugging # ####################################################################### def qmlb(args): # executeCommand(command, to_string=True).split("\n") warn("RUNNING: break -f QScript::FunctionWrapper::proxyCall") output = gdb.execute("rbreak -f QScript::FunctionWrapper::proxyCall", to_string=True).split("\n") warn("OUTPUT: %s " % output) bp = output[0] warn("BP: %s " % bp) # BP: ['Breakpoint 3 at 0xf166e7: file .../qscriptfunction.cpp, line 75.\\n'] \n" pos = bp.find(' ') + 1 warn("POS: %s " % pos) nr = bp[bp.find(' ') + 1 : bp.find(' at ')] warn("NR: %s " % nr) return bp registerCommand("qmlb", qmlb) bbsetup()