internal ClassFile(byte[] buf, int offset, int length, string inputClassName, ClassFileParseOptions options)
{
try
{
BigEndianBinaryReader br = new BigEndianBinaryReader(buf, offset, length);
if(br.ReadUInt32() != 0xCAFEBABE)
{
throw new ClassFormatError("{0} (Bad magic number)", inputClassName);
}
ushort minorVersion = br.ReadUInt16();
ushort majorVersion = br.ReadUInt16();
if((majorVersion & FLAG_MASK_MAJORVERSION) != majorVersion
|| majorVersion < SupportedVersions.Minimum
|| majorVersion > SupportedVersions.Maximum
|| (majorVersion == SupportedVersions.Minimum && minorVersion < 3)
|| (majorVersion == SupportedVersions.Maximum && minorVersion != 0))
{
throw new UnsupportedClassVersionError(inputClassName + " (" + majorVersion + "." + minorVersion + ")");
}
flags = majorVersion;
int constantpoolcount = br.ReadUInt16();
constantpool = new ConstantPoolItem[constantpoolcount];
string[] utf8_cp = new string[constantpoolcount];
for(int i = 1; i < constantpoolcount; i++)
{
Constant tag = (Constant)br.ReadByte();
switch(tag)
{
case Constant.Class:
constantpool[i] = new ConstantPoolItemClass(br);
break;
case Constant.Double:
constantpool[i] = new ConstantPoolItemDouble(br);
i++;
break;
case Constant.Fieldref:
constantpool[i] = new ConstantPoolItemFieldref(br);
break;
case Constant.Float:
constantpool[i] = new ConstantPoolItemFloat(br);
break;
case Constant.Integer:
constantpool[i] = new ConstantPoolItemInteger(br);
break;
case Constant.InterfaceMethodref:
constantpool[i] = new ConstantPoolItemInterfaceMethodref(br);
break;
case Constant.Long:
constantpool[i] = new ConstantPoolItemLong(br);
i++;
break;
case Constant.Methodref:
constantpool[i] = new ConstantPoolItemMethodref(br);
break;
case Constant.NameAndType:
constantpool[i] = new ConstantPoolItemNameAndType(br);
break;
case Constant.MethodHandle:
if (majorVersion < 51)
goto default;
constantpool[i] = new ConstantPoolItemMethodHandle(br);
break;
case Constant.MethodType:
if (majorVersion < 51)
goto default;
constantpool[i] = new ConstantPoolItemMethodType(br);
break;
case Constant.InvokeDynamic:
if (majorVersion < 51)
goto default;
constantpool[i] = new ConstantPoolItemInvokeDynamic(br);
break;
case Constant.String:
constantpool[i] = new ConstantPoolItemString(br);
break;
case Constant.Utf8:
utf8_cp[i] = br.ReadString(inputClassName);
break;
default:
throw new ClassFormatError("{0} (Illegal constant pool type 0x{1:X})", inputClassName, tag);
}
}
for(int i = 1; i < constantpoolcount; i++)
{
if(constantpool[i] != null)
{
try
{
constantpool[i].Resolve(this, utf8_cp, options);
}
catch(ClassFormatError x)
{
// HACK at this point we don't yet have the class name, so any exceptions throw
// are missing the class name
throw new ClassFormatError("{0} ({1})", inputClassName, x.Message);
}
catch(IndexOutOfRangeException)
{
throw new ClassFormatError("{0} (Invalid constant pool item #{1})", inputClassName, i);
}
catch(InvalidCastException)
{
throw new ClassFormatError("{0} (Invalid constant pool item #{1})", inputClassName, i);
}
}
}
access_flags = (Modifiers)br.ReadUInt16();
// NOTE although the vmspec says (in 4.1) that interfaces must be marked abstract, earlier versions of
// javac (JDK 1.1) didn't do this, so the VM doesn't enforce this rule for older class files.
// NOTE although the vmspec implies (in 4.1) that ACC_SUPER is illegal on interfaces, it doesn't enforce this
// for older class files.
// (See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6320322)
if((IsInterface && IsFinal)
|| (IsAbstract && IsFinal)
|| (majorVersion >= 49 && IsAnnotation && !IsInterface)
|| (majorVersion >= 49 && IsInterface && (!IsAbstract || IsSuper || IsEnum)))
{
throw new ClassFormatError("{0} (Illegal class modifiers 0x{1:X})", inputClassName, access_flags);
}
this_class = br.ReadUInt16();
ValidateConstantPoolItemClass(inputClassName, this_class);
super_class = br.ReadUInt16();
ValidateConstantPoolItemClass(inputClassName, super_class);
if(IsInterface && (super_class == 0 || this.SuperClass != "java.lang.Object"))
{
throw new ClassFormatError("{0} (Interfaces must have java.lang.Object as superclass)", Name);
}
// most checks are already done by ConstantPoolItemClass.Resolve, but since it allows
// array types, we do need to check for that
if(this.Name[0] == '[')
{
throw new ClassFormatError("Bad name");
}
int interfaces_count = br.ReadUInt16();
interfaces = new ConstantPoolItemClass[interfaces_count];
for(int i = 0; i < interfaces.Length; i++)
{
int index = br.ReadUInt16();
if(index == 0 || index >= constantpool.Length)
{
throw new ClassFormatError("{0} (Illegal constant pool index)", Name);
}
ConstantPoolItemClass cpi = constantpool[index] as ConstantPoolItemClass;
if(cpi == null)
{
throw new ClassFormatError("{0} (Interface name has bad constant type)", Name);
}
interfaces[i] = cpi;
for(int j = 0; j < i; j++)
{
if(ReferenceEquals(interfaces[j].Name, cpi.Name))
{
throw new ClassFormatError("{0} (Repetitive interface name)", Name);
}
}
}
int fields_count = br.ReadUInt16();
fields = new Field[fields_count];
for(int i = 0; i < fields_count; i++)
{
fields[i] = new Field(this, utf8_cp, br);
string name = fields[i].Name;
if(!IsValidFieldName(name, majorVersion))
{
throw new ClassFormatError("{0} (Illegal field name \"{1}\")", Name, name);
}
for(int j = 0; j < i; j++)
{
if(ReferenceEquals(fields[j].Name, name) && ReferenceEquals(fields[j].Signature, fields[i].Signature))
{
throw new ClassFormatError("{0} (Repetitive field name/signature)", Name);
}
}
}
int methods_count = br.ReadUInt16();
methods = new Method[methods_count];
for(int i = 0; i < methods_count; i++)
{
methods[i] = new Method(this, utf8_cp, options, br);
string name = methods[i].Name;
string sig = methods[i].Signature;
if(!IsValidMethodName(name, majorVersion))
{
if(!ReferenceEquals(name, StringConstants.INIT) && !ReferenceEquals(name, StringConstants.CLINIT))
{
throw new ClassFormatError("{0} (Illegal method name \"{1}\")", Name, name);
}
if(!sig.EndsWith("V"))
{
throw new ClassFormatError("{0} (Method \"{1}\" has illegal signature \"{2}\")", Name, name, sig);
}
}
for(int j = 0; j < i; j++)
{
if(ReferenceEquals(methods[j].Name, name) && ReferenceEquals(methods[j].Signature, sig))
{
throw new ClassFormatError("{0} (Repetitive method name/signature)", Name);
}
}
}
int attributes_count = br.ReadUInt16();
for(int i = 0; i < attributes_count; i++)
{
switch(GetConstantPoolUtf8String(utf8_cp, br.ReadUInt16()))
{
case "Deprecated":
if(br.ReadUInt32() != 0)
{
throw new ClassFormatError("Invalid Deprecated attribute length");
}
flags |= FLAG_MASK_DEPRECATED;
break;
case "SourceFile":
if(br.ReadUInt32() != 2)
{
throw new ClassFormatError("SourceFile attribute has incorrect length");
}
sourceFile = GetConstantPoolUtf8String(utf8_cp, br.ReadUInt16());
break;
case "InnerClasses":
{
BigEndianBinaryReader rdr = br;
uint attribute_length = br.ReadUInt32();
ushort count = rdr.ReadUInt16();
if(this.MajorVersion >= 49 && attribute_length != 2 + count * (2 + 2 + 2 + 2))
{
throw new ClassFormatError("{0} (InnerClasses attribute has incorrect length)", this.Name);
}
innerClasses = new InnerClass[count];
for(int j = 0; j < innerClasses.Length; j++)
{
innerClasses[j].innerClass = rdr.ReadUInt16();
innerClasses[j].outerClass = rdr.ReadUInt16();
innerClasses[j].name = rdr.ReadUInt16();
innerClasses[j].accessFlags = (Modifiers)rdr.ReadUInt16();
if(innerClasses[j].innerClass != 0 && !(GetConstantPoolItem(innerClasses[j].innerClass) is ConstantPoolItemClass))
{
throw new ClassFormatError("{0} (inner_class_info_index has bad constant pool index)", this.Name);
}
if(innerClasses[j].outerClass != 0 && !(GetConstantPoolItem(innerClasses[j].outerClass) is ConstantPoolItemClass))
{
throw new ClassFormatError("{0} (outer_class_info_index has bad constant pool index)", this.Name);
}
if(innerClasses[j].name != 0 && utf8_cp[innerClasses[j].name] == null)
{
throw new ClassFormatError("{0} (inner class name has bad constant pool index)", this.Name);
}
if(innerClasses[j].innerClass == innerClasses[j].outerClass)
{
throw new ClassFormatError("{0} (Class is both inner and outer class)", this.Name);
}
if(innerClasses[j].innerClass != 0 && innerClasses[j].outerClass != 0)
{
MarkLinkRequiredConstantPoolItem(innerClasses[j].innerClass);
MarkLinkRequiredConstantPoolItem(innerClasses[j].outerClass);
}
}
break;
}
case "Signature":
if(majorVersion < 49)
{
goto default;
}
if(br.ReadUInt32() != 2)
{
throw new ClassFormatError("Signature attribute has incorrect length");
}
signature = GetConstantPoolUtf8String(utf8_cp, br.ReadUInt16());
break;
case "EnclosingMethod":
if(majorVersion < 49)
{
goto default;
}
if(br.ReadUInt32() != 4)
{
throw new ClassFormatError("EnclosingMethod attribute has incorrect length");
}
else
{
int class_index = br.ReadUInt16();
int method_index = br.ReadUInt16();
if(method_index == 0)
{
enclosingMethod = new string[] {
GetConstantPoolClass(class_index),
null,
null
};
}
else
{
ConstantPoolItemNameAndType m = (ConstantPoolItemNameAndType)GetConstantPoolItem(method_index);
enclosingMethod = new string[] {
GetConstantPoolClass(class_index),
GetConstantPoolUtf8String(utf8_cp, m.name_index),
GetConstantPoolUtf8String(utf8_cp, m.descriptor_index).Replace('/', '.')
};
}
}
break;
case "RuntimeVisibleAnnotations":
if(majorVersion < 49)
{
goto default;
}
annotations = ReadAnnotations(br, this, utf8_cp);
break;
#if STATIC_COMPILER
case "RuntimeInvisibleAnnotations":
if(majorVersion < 49)
{
goto default;
}
foreach(object[] annot in ReadAnnotations(br, this, utf8_cp))
{
if(annot[1].Equals("Likvm/lang/Internal;"))
{
this.access_flags &= ~Modifiers.AccessMask;
flags |= FLAG_MASK_INTERNAL;
}
}
break;
#endif
case "BootstrapMethods":
if(majorVersion < 51)
{
goto default;
}
bootstrapMethods = ReadBootstrapMethods(br, this);
break;
case "IKVM.NET.Assembly":
if(br.ReadUInt32() != 2)
{
throw new ClassFormatError("IKVM.NET.Assembly attribute has incorrect length");
}
ikvmAssembly = GetConstantPoolUtf8String(utf8_cp, br.ReadUInt16());
break;
default:
br.Skip(br.ReadUInt32());
break;
}
}
// validate the invokedynamic entries to point into the bootstrapMethods array
for(int i = 1; i < constantpoolcount; i++)
{
ConstantPoolItemInvokeDynamic cpi;
if(constantpool[i] != null
&& (cpi = constantpool[i] as ConstantPoolItemInvokeDynamic) != null)
{
if(bootstrapMethods == null || cpi.BootstrapMethod >= bootstrapMethods.Length)
{
throw new ClassFormatError("Short length on BootstrapMethods in class file");
}
}
}
if(br.Position != offset + length)
{
throw new ClassFormatError("Extra bytes at the end of the class file");
}
}
catch(OverflowException)
{
throw new ClassFormatError("Truncated class file (or section)");
}
catch(IndexOutOfRangeException)
{
// TODO we should throw more specific errors
throw new ClassFormatError("Unspecified class file format error");
}
// catch(Exception x)
// {
// Console.WriteLine(x);
// FileStream fs = File.Create(inputClassName + ".broken");
// fs.Write(buf, offset, length);
// fs.Close();
// throw;
// }
}
internal ClassFile(byte[] buf, int offset, int length, string inputClassName, bool allowJavaLangObject)
{
try
{
BigEndianBinaryReader br = new BigEndianBinaryReader(buf, offset, length);
if (br.ReadUInt32() != 0xCAFEBABE)
{
throw new ClassFormatError("{0} (Bad magic number)", inputClassName);
}
int minorVersion = br.ReadUInt16();
majorVersion = br.ReadUInt16();
if (majorVersion < SupportedVersions.Minimum || majorVersion > SupportedVersions.Maximum)
{
throw new UnsupportedClassVersionError(inputClassName + " (" + majorVersion + "." + minorVersion + ")");
}
int constantpoolcount = br.ReadUInt16();
constantpool = new ConstantPoolItem[constantpoolcount];
utf8_cp = new string[constantpoolcount];
for (int i = 1; i < constantpoolcount; i++)
{
Constant tag = (Constant) br.ReadByte();
switch (tag)
{
case Constant.Class:
constantpool[i] = new ConstantPoolItemClass(br);
break;
case Constant.Double:
constantpool[i] = new ConstantPoolItemDouble(br);
i++;
break;
case Constant.Fieldref:
constantpool[i] = new ConstantPoolItemFieldref(br);
break;
case Constant.Float:
constantpool[i] = new ConstantPoolItemFloat(br);
break;
case Constant.Integer:
constantpool[i] = new ConstantPoolItemInteger(br);
break;
case Constant.InterfaceMethodref:
constantpool[i] = new ConstantPoolItemInterfaceMethodref(br);
break;
case Constant.Long:
constantpool[i] = new ConstantPoolItemLong(br);
i++;
break;
case Constant.Methodref:
constantpool[i] = new ConstantPoolItemMethodref(br);
break;
case Constant.NameAndType:
constantpool[i] = new ConstantPoolItemNameAndType(br);
break;
case Constant.String:
constantpool[i] = new ConstantPoolItemString(br);
break;
case Constant.Utf8:
utf8_cp[i] = br.ReadString(inputClassName);
break;
default:
throw new ClassFormatError("{0} (Illegal constant pool type 0x{1:X})", inputClassName, tag);
}
}
for (int i = 1; i < constantpoolcount; i++)
{
if (constantpool[i] != null)
{
try
{
constantpool[i].Resolve(this);
}
catch (ClassFormatError x)
{
// HACK at this point we don't yet have the class name, so any exceptions throw
// are missing the class name
throw new ClassFormatError("{0} ({1})", inputClassName, x.Message);
}
catch (IndexOutOfRangeException)
{
throw new ClassFormatError("{0} (Invalid constant pool item #{1})", inputClassName, i);
}
catch (InvalidCastException)
{
throw new ClassFormatError("{0} (Invalid constant pool item #{1})", inputClassName, i);
}
}
}
access_flags = (__Modifiers) br.ReadUInt16();
// NOTE although the vmspec says (in 4.1) that interfaces must be marked abstract, earlier versions of
// javac (JDK 1.1) didn't do this, so the VM doesn't enforce this rule
// NOTE although the vmspec implies (in 4.1) that ACC_SUPER is illegal on interfaces, it doesn't enforce this
if ((IsInterface && IsFinal) || (IsAbstract && IsFinal))
{
throw new ClassFormatError("{0} (Illegal class modifiers 0x{1:X})", inputClassName, access_flags);
}
this_class = br.ReadUInt16();
ValidateConstantPoolItemClass(inputClassName, this_class);
super_class = br.ReadUInt16();
// NOTE for convenience we allow parsing java/lang/Object (which has no super class), so
// we check for super_class != 0
if (super_class != 0)
{
ValidateConstantPoolItemClass(inputClassName, super_class);
}
else
{
if (this.Name != "java.lang.Object" || !allowJavaLangObject)
{
throw new ClassFormatError("{0} (Bad superclass index)", Name);
}
}
if (IsInterface && (super_class == 0 || this.SuperClass != "java.lang.Object"))
{
throw new ClassFormatError("{0} (Interfaces must have java.lang.Object as superclass)", Name);
}
// most checks are already done by ConstantPoolItemClass.Resolve, but since it allows
// array types, we do need to check for that
if (this.Name[0] == '[')
{
throw new ClassFormatError("Bad name");
}
int interfaces_count = br.ReadUInt16();
interfaces = new ConstantPoolItemClass[interfaces_count];
for (int i = 0; i < interfaces.Length; i++)
{
int index = br.ReadUInt16();
if (index == 0 || index >= constantpool.Length)
{
throw new ClassFormatError("{0} (Illegal constant pool index)", Name);
}
ConstantPoolItemClass cpi = constantpool[index] as ConstantPoolItemClass;
if (cpi == null)
{
throw new ClassFormatError("{0} (Interface name has bad constant type)", Name);
}
interfaces[i] = cpi;
for (int j = 0; j < i; j++)
{
if (interfaces[j].Name == cpi.Name)
{
throw new ClassFormatError("{0} (Repetitive interface name)", Name);
}
}
}
int fields_count = br.ReadUInt16();
fields = new Field[fields_count];
Hashtable fieldNameSigs = new Hashtable();
for (int i = 0; i < fields_count; i++)
{
fields[i] = new Field(this, br);
string name = fields[i].Name;
if (!IsValidIdentifier(name))
{
throw new ClassFormatError("{0} (Illegal field name \"{1}\")", Name, name);
}
try
{
fieldNameSigs.Add(name + fields[i].Signature, null);
}
catch (ArgumentException)
{
throw new ClassFormatError("{0} (Repetitive field name/signature)", Name);
}
}
int methods_count = br.ReadUInt16();
methods = new Method[methods_count];
Hashtable methodNameSigs = new Hashtable();
for (int i = 0; i < methods_count; i++)
{
methods[i] = new Method(this, br);
string name = methods[i].Name;
string sig = methods[i].Signature;
if (!IsValidIdentifier(name) && name != "<init>" && name != "<clinit>")
{
throw new ClassFormatError("{0} (Illegal method name \"{1}\")", Name, name);
}
if ((name == "<init>" || name == "<clinit>") && !sig.EndsWith("V"))
{
throw new ClassFormatError("{0} (Method \"{1}\" has illegal signature \"{2}\")", Name, name, sig);
}
try
{
methodNameSigs.Add(name + sig, null);
}
catch (ArgumentException)
{
throw new ClassFormatError("{0} (Repetitive method name/signature)", Name);
}
}
int attributes_count = br.ReadUInt16();
for (int i = 0; i < attributes_count; i++)
{
switch (GetConstantPoolUtf8String(br.ReadUInt16()))
{
case "Deprecated":
deprecated = true;
#if FUZZ_HACK
br.Skip(br.ReadUInt32());
#else
if(br.ReadUInt32() != 0)
{
throw new ClassFormatError("Deprecated attribute has non-zero length");
}
#endif
break;
case "SourceFile":
if (br.ReadUInt32() != 2)
{
throw new ClassFormatError("SourceFile attribute has incorrect length");
}
sourceFile = GetConstantPoolUtf8String(br.ReadUInt16());
break;
case "InnerClasses":
#if FUZZ_HACK
// Sun totally ignores the length of InnerClasses attribute,
// so when we're running Fuzz this shows up as lots of differences.
// To get rid off these differences define the FUZZ_HACK symbol.
BigEndianBinaryReader rdr = br;
br.ReadUInt32();
#else
BigEndianBinaryReader rdr = br.Section(br.ReadUInt32());
#endif
ushort count = rdr.ReadUInt16();
innerClasses = new InnerClass[count];
for (int j = 0; j < innerClasses.Length; j++)
{
innerClasses[j].innerClass = rdr.ReadUInt16();
innerClasses[j].outerClass = rdr.ReadUInt16();
innerClasses[j].name = rdr.ReadUInt16();
innerClasses[j].accessFlags = (__Modifiers) rdr.ReadUInt16();
if (innerClasses[j].innerClass != 0 && !(GetConstantPoolItem(innerClasses[j].innerClass) is ConstantPoolItemClass))
{
throw new ClassFormatError("{0} (inner_class_info_index has bad constant pool index)", this.Name);
}
if (innerClasses[j].outerClass != 0 && !(GetConstantPoolItem(innerClasses[j].outerClass) is ConstantPoolItemClass))
{
throw new ClassFormatError("{0} (outer_class_info_index has bad constant pool index)", this.Name);
}
if (innerClasses[j].name != 0 && utf8_cp[innerClasses[j].name] == null)
{
throw new ClassFormatError("{0} (inner class name has bad constant pool index)", this.Name);
}
if (innerClasses[j].innerClass == innerClasses[j].outerClass)
{
throw new ClassFormatError("{0} (Class is both inner and outer class)", this.Name);
}
}
#if !FUZZ_HACK
if(!rdr.IsAtEnd)
{
throw new ClassFormatError("{0} (InnerClasses attribute has wrong length)", this.Name);
}
#endif
break;
case "IKVM.NET.Assembly":
if (br.ReadUInt32() != 2)
{
throw new ClassFormatError("IKVM.NET.Assembly attribute has incorrect length");
}
ikvmAssembly = GetConstantPoolUtf8String(br.ReadUInt16());
break;
default:
br.Skip(br.ReadUInt32());
break;
}
}
if (br.Position != offset + length)
{
throw new ClassFormatError("Extra bytes at the end of the class file");
}
}
catch (OverflowException)
{
throw new ClassFormatError("Truncated class file (or section)");
}
catch (IndexOutOfRangeException)
{
// TODO we should throw more specific errors
throw new ClassFormatError("Unspecified class file format error");
}
// catch(Exception x)
// {
// Console.WriteLine(x);
// FileStream fs = File.Create(inputClassName + ".broken");
// fs.Write(buf, offset, length);
// fs.Close();
// throw;
// }
}
