package org.ibex.classgen;
public interface CGConst {
+
// Class only
public static final int ACC_INTERFACE = (byte) 0x0200;
public static final int ACC_SUPER = (byte) 0x0020;
CPGen owner; // don't need this yet, but we will to implement ref() and unref()
int n; // this is the refcount if state == OPEN, index if >= STABLE
int tag;
- Ent e0;
Ent(CPGen owner, int tag) { this.owner = owner; this.tag = tag; }
private String fixme() { throw new Error("fixme"); }
Object key() throws ClassGen.ClassReadExn {
switch(tag) {
- case 7: return Type.fromDescriptor(((Utf8Ent)e0).s);
+ case 7: return Type.fromDescriptor(((Utf8Ent)e1).s);
case 8: return (((Utf8Ent)e1).s);
case 9: {
NameAndTypeKey nt = (NameAndTypeKey) e2.key();
if(t == null) throw new ClassGen.ClassReadExn("invalid type descriptor");
return new FieldRef((Type.Object)e1.key(), nt.name, t);
}
- case 10: {
+ case 10: case 11: {
NameAndTypeKey nt = (NameAndTypeKey) e2.key();
- return new MethodRef((Type.Object)e1.key(), fixme(), null, null);
+ if (e1.key() == null) throw new Error(e1.tag + " => " + e1.key());
+ return new MethodRef((Type.Object)e1.key(), "methodname", Type.VOID, new Type[0]); // FIXME FIXME
+ }
+ case 12: {
+ return new NameAndTypeKey(((Utf8Ent)e1).s, ((Utf8Ent)e2).s);
}
}
- throw new Error("FIXME");
+ throw new Error("FIXME " + tag);
}
}
Utf8Ent(CPGen owner) { super(owner, 1); }
String debugToString() { return s; }
void dump(DataOutput o) throws IOException { super.dump(o); o.writeUTF(s); }
- Object key() { throw new Error("Brian is lame"); }
+ Object key() {
+ return s;
+ }
}
/*
if(e == null) throw new IllegalStateException("entry not found");
return getIndex(e);
}
+ public final String getUtf8ByIndex(int i) {
+ return ((Utf8Ent)getByIndex(i)).s;
+ }
public final int getUtf8Index(String s) {
Ent e = getUtf8(s);
if(e == null) throw new IllegalStateException("entry not found");
return ent.n;
}
- public final Type.Object getType(int index) { return Type.fromDescriptor(((Utf8Ent)getByIndex(index)).s).asObject(); }
+ public final Type getType(int index) throws ClassGen.ClassReadExn {
+ Ent e = getByIndex(index);
+ if (e instanceof Utf8Ent) return Type.fromDescriptor(((Utf8Ent)e).s);
+ else return (Type)e.key();
+ }
public final Ent getByIndex(int index) {
if(state < STABLE) throw new IllegalStateException("constant pool is not stable");
usedSlots = in.readUnsignedShort();
if(usedSlots==0) throw new ClassGen.ClassReadExn("invalid used slots");
- // these are to remember the CPRefEnt e0 and e1s we have to fix up
- int[] e0s = new int[usedSlots];
+ // these are to remember the CPRefEnt e1 and e2s we have to fix up
int[] e1s = new int[usedSlots];
int[] e2s = new int[usedSlots];
case 12: // NameAndType
{
e = new CPRefEnt(this, tag);
- e1s[index] = in.readUnsignedShort();;
+ e1s[index] = in.readUnsignedShort();
if(tag != 7 && tag != 8) e2s[index] = in.readUnsignedShort();
break;
}
LongEnt le;
e = le = new LongEnt(this, tag);
le.l = in.readLong();
- index++;
break;
}
case 1: // Utf8
throw new ClassGen.ClassReadExn("invalid cp ent tag");
}
entriesByIndex[index] = e;
+ if (e instanceof LongEnt) index++;
}
for(int index=1;index<usedSlots;index++) {
int i = index;
Ent e = entriesByIndex[index];
- if(e == null) throw new Error("should never happen");
- if(e instanceof CPRefEnt) {
- CPRefEnt ce = (CPRefEnt) e;
- if(e0s[i] == 0 || e0s[i] >= usedSlots) throw new ClassGen.ClassReadExn("invalid cp index");
- ce.e0 = entriesByIndex[e0s[i]];
- if(ce.e0 == null) throw new ClassGen.ClassReadExn("invalid cp index");
- if(ce.tag != 7 && ce.tag != 8) {
- if(e1s[i] == 0 || e1s[i] >= usedSlots) throw new ClassGen.ClassReadExn("invalid cp index");
- ce.e1 = entriesByIndex[e1s[i]];
- if(ce.e1 == null) throw new ClassGen.ClassReadExn("invalid cp index");
- }
- switch(ce.tag) {
- case 7:
- case 8:
- if(!(ce.e0 instanceof Utf8Ent)) throw new ClassGen.ClassReadExn("expected a utf8 ent");
- break;
- case 9:
- case 10:
- case 11:
- if(!(ce.e1 instanceof CPRefEnt) || ((CPRefEnt)ce.e1).tag != 7)
- throw new ClassGen.ClassReadExn("expected a type ent");
- if(!(ce.e2 instanceof CPRefEnt) || ((CPRefEnt)ce.e2).tag != 12)
- throw new ClassGen.ClassReadExn("expected a name and type ent");
- break;
- case 12:
- if(!(ce.e1 instanceof Utf8Ent)) throw new ClassGen.ClassReadExn("expected a utf8 ent");
- if(!(ce.e2 instanceof Utf8Ent)) throw new ClassGen.ClassReadExn("expected a utf8 ent");
- }
- } else if(e instanceof LongEnt) {
+ if (e == null) throw new Error("should never happen: " + i + "/"+usedSlots);
+ if (e instanceof LongEnt) {
index++;
+ continue;
}
+ if (!(e instanceof CPRefEnt)) continue;
+ CPRefEnt ce = (CPRefEnt) e;
+ if(e1s[i] == 0 || e1s[i] >= usedSlots) throw new ClassGen.ClassReadExn("invalid cp index");
+ ce.e1 = entriesByIndex[e1s[i]];
+ if(ce.e1 == null) throw new ClassGen.ClassReadExn("invalid cp index");
+ if(ce.tag != 7 && ce.tag != 8) {
+ if(e2s[i] == 0 || e2s[i] >= usedSlots) throw new ClassGen.ClassReadExn("invalid cp index");
+ ce.e2 = entriesByIndex[e2s[i]];
+ if(ce.e2 == null) throw new ClassGen.ClassReadExn("invalid cp index");
+ }
+ switch(ce.tag) {
+ case 7:
+ case 8:
+ if(!(ce.e1 instanceof Utf8Ent)) throw new ClassGen.ClassReadExn("expected a utf8 ent");
+ break;
+ case 9:
+ case 10:
+ case 11:
+ if(!(ce.e1 instanceof CPRefEnt) || ((CPRefEnt)ce.e1).tag != 7)
+ throw new ClassGen.ClassReadExn("expected a type ent");
+ if(!(ce.e2 instanceof CPRefEnt) || ((CPRefEnt)ce.e2).tag != 12)
+ throw new ClassGen.ClassReadExn("expected a name and type ent");
+ break;
+ case 12:
+ if(!(ce.e1 instanceof Utf8Ent)) throw new ClassGen.ClassReadExn("expected a utf8 ent");
+ if(!(ce.e2 instanceof Utf8Ent)) throw new ClassGen.ClassReadExn("expected a utf8 ent");
+ break;
+ }
+ }
+ for(int i=1; i<usedSlots; i++) {
+ Ent e = entriesByIndex[i];
entries.put(e.key(), e);
+ if (e instanceof LongEnt) i++;
}
state = STABLE;
}
private final Type.Object thisType;
private final Type.Object superType;
private final Type.Object[] interfaces;
+ private short minor;
+ private short major;
final int flags;
private String sourceFile;
final CPGen cp;
private final AttrGen attributes;
-
+
+ public static String flagsToString(int flags) {
+ String ret = "";
+ if ((flags & ACC_PUBLIC) != 0) ret += "public ";
+ if ((flags & ACC_PRIVATE) != 0) ret += "private ";
+ if ((flags & ACC_PROTECTED) != 0) ret += "protected ";
+ if ((flags & ACC_STATIC) != 0) ret += "static ";
+ if ((flags & ACC_FINAL) != 0) ret += "final ";
+ if ((flags & ACC_ABSTRACT) != 0) ret += "abstract ";
+ if ((flags & ACC_SYNCHRONIZED) != 0) ret += "synchronized ";
+ if ((flags & ACC_NATIVE) != 0) ret += "native ";
+ if ((flags & ACC_STRICT) != 0) ret += "strictfp ";
+ if ((flags & ACC_VOLATILE) != 0) ret += "volatile ";
+ if ((flags & ACC_TRANSIENT) != 0) ret += "transient ";
+ return ret;
+ }
+
+ public String toString() { StringBuffer sb = new StringBuffer(); toString(sb); return sb.toString(); }
+ public void toString(StringBuffer sb) {
+ sb.append(flagsToString(flags));
+ sb.append((flags & ACC_INTERFACE) != 0 ? "interface " : "class ");
+ sb.append(thisType.humanReadable());
+ if (superType != null) sb.append(" extends " + superType.humanReadable());
+ if (interfaces != null && interfaces.length > 0) sb.append(" implements");
+ for(int i=0; i<interfaces.length; i++) sb.append((i==0?" ":", ")+interfaces[i].humanReadable());
+ sb.append(" {");
+ sb.append(" // [jcf v"+major+"."+minor+"]");
+ if (sourceFile != null) sb.append(" from " + sourceFile);
+ sb.append("\n");
+ for(int i=0; i<fields.size(); i++) {
+ sb.append(" ");
+ ((FieldGen)fields.elementAt(i)).toString(sb);
+ sb.append("\n");
+ }
+ for(int i=0; i<methods.size(); i++) {
+ sb.append(" ");
+ ((MethodGen)methods.elementAt(i)).toString(sb, thisType.getShortName());
+ sb.append("\n");
+ }
+ sb.append("}");
+ }
+
/** @see #ClassGen(Type.Object, Type.Object, int) */
public ClassGen(String name, String superName, int flags) {
this(Type.fromDescriptor(name).asObject(), Type.fromDescriptor(superName).asObject(), flags);
this.superType = superType;
this.interfaces = interfaces;
this.flags = flags;
+ this.minor = 3;
+ this.major = 45;
cp = new CPGen();
attributes = new AttrGen(cp);
cp.seal();
o.writeInt(0xcafebabe); // magic
- o.writeShort(3); // minor_version
- o.writeShort(45); // major_version
+ o.writeShort(minor); // minor_version
+ o.writeShort(major); // major_version
cp.dump(o); // constant_pool
}
ClassGen(DataInput i) throws ClassReadExn, IOException {
- if(i.readInt() != 0xcadebabe) throw new ClassReadExn("invalid magic");
- short minor = (short)i.readInt();
- if(minor != 3) throw new ClassReadExn("invalid minor version: " + minor);
- if(i.readInt() != 45) throw new ClassReadExn("invalid major version");
+ int magic = i.readInt();
+ if (magic != 0xcafebabe) throw new ClassReadExn("invalid magic: " + Long.toString(0xffffffffL & magic, 16));
+ minor = i.readShort();
+ //if (minor != 3) throw new ClassReadExn("invalid minor version: " + minor);
+ major = i.readShort();
+ //if (major != 45 && major != 46) throw new ClassReadExn("invalid major version");
cp = new CPGen(i);
- flags = (short)i.readShort();
- thisType = cp.getType(i.readShort());
- superType = cp.getType(i.readShort());
+ flags = i.readShort();
+ thisType = (Type.Object)cp.getType(i.readShort());
+ superType = (Type.Object)cp.getType(i.readShort());
interfaces = new Type.Object[i.readShort()];
- for(int j=0; j<interfaces.length; j++) interfaces[j] = cp.getType(i.readShort());
+ for(int j=0; j<interfaces.length; j++) interfaces[j] = (Type.Object)cp.getType(i.readShort());
int numFields = i.readShort();
- for(int j=0; j<numFields; j++) fields.add(new FieldGen(i));
+ for(int j=0; j<numFields; j++) fields.add(new FieldGen(cp, i));
int numMethods = i.readShort();
- for(int j=0; j<numMethods; j++) methods.add(new MethodGen(i));
+ for(int j=0; j<numMethods; j++) methods.add(new MethodGen(cp, i));
attributes = new AttrGen(cp, i);
+ sourceFile = (String)attributes.get("SourceFile");
}
/** Thrown when class generation fails for a reason not under the control of the user
public AttrGen(CPGen cp) { this.cp = cp; }
public AttrGen(CPGen cp, DataInput in) throws IOException {
this(cp);
- while(true) {
+ int size = in.readShort();
+ for(int i=0; i<size; i++) {
String name = null;
- try {
- name = ((CPGen.Utf8Ent)cp.getByIndex(in.readShort())).s;
- } catch (EOFException _) {
- return;
- }
+ int idx = in.readShort();
+ CPGen.Ent e = cp.getByIndex(idx);
+ Object key = e.key();
+ if (key instanceof String) name = (String)key;
+ else name = ((Type)key).getDescriptor();
+
int length = in.readInt();
if (length==2) { // FIXME might be wrong assumption
ht.put(name, cp.getByIndex(in.readShort()));
}
}
}
+
+ public Object get(String s) {
+ Object ret = ht.get(s);
+ if (ret instanceof CPGen.Utf8Ent) return ((CPGen.Utf8Ent)ret).s;
+ return ret;
+ }
public void add(String s, Object data) {
cp.addUtf8(s);
}
}
- /*public static void main(String[] args) throws Exception {
- Type.Object me = new Type.Object("Test");
- ClassGen cg = new ClassGen("Test", "java.lang.Object", ACC_PUBLIC|ACC_SUPER|ACC_FINAL);
- FieldGen fg = cg.addField("foo", Type.INT, ACC_PUBLIC|ACC_STATIC);
+ public static void main(String[] args) throws Exception {
+ if (args.length==1) {
+ if (args[0].endsWith(".class")) {
+ System.out.println(new ClassGen(new DataInputStream(new FileInputStream(args[0]))));
+ } else {
+ InputStream is = Class.forName(args[0]).getClassLoader().getResourceAsStream(args[0].replace('.', '/')+".class");
+ System.out.println(new ClassGen(new DataInputStream(is)));
+ }
+ } else {
+ /*
+ Type.Object me = new Type.Object("Test");
+ ClassGen cg = new ClassGen("Test", "java.lang.Object", ACC_PUBLIC|ACC_SUPER|ACC_FINAL);
+ FieldGen fg = cg.addField("foo", Type.INT, ACC_PUBLIC|ACC_STATIC);
- MethodGen mg = cg.addMethod("main", Type.VOID, new Type[]{Type.arrayType(Type.STRING)}, ACC_STATIC|ACC_PUBLIC);
- mg.setMaxLocals(1);
- mg.addPushConst(0);
- //mg.add(ISTORE_0);
- mg.add(PUTSTATIC, fieldRef(me, "foo", Type.INT));
- int top = mg.size();
- mg.add(GETSTATIC, cg.fieldRef(new Type.Object("java.lang.System"), "out", new Type.Object("java.io.PrintStream")));
- //mg.add(ILOAD_0);
- mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
- mg.add(INVOKEVIRTUAL, cg.methodRef(new Type.Object("java.io.PrintStream"), "println", Type.VOID, new Type[]{Type.INT}));
- //mg.add(IINC, new int[]{0, 1});
- //mg.add(ILOAD_0);
- mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
- mg.addPushConst(1);
- mg.add(IADD);
- mg.add(DUP);
- mg.add(PUTSTATIC, cg.fieldRef(me, "foo", Type.INT));
- mg.addPushConst(10);
- mg.add(IF_ICMPLT, top);
- mg.add(RETURN);
- cg.dump("Test.class");
- }*/
+ MethodGen mg = cg.addMethod("main", Type.VOID, new Type[]{Type.arrayType(Type.STRING)}, ACC_STATIC|ACC_PUBLIC);
+ mg.setMaxLocals(1);
+ mg.addPushConst(0);
+ //mg.add(ISTORE_0);
+ mg.add(PUTSTATIC, fieldRef(me, "foo", Type.INT));
+ int top = mg.size();
+ mg.add(GETSTATIC, cg.fieldRef(new Type.Object("java.lang.System"), "out", new Type.Object("java.io.PrintStream")));
+ //mg.add(ILOAD_0);
+ mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
+ mg.add(INVOKEVIRTUAL, cg.methodRef(new Type.Object("java.io.PrintStream"), "println",
+ Type.VOID, new Type[]{Type.INT}));
+ //mg.add(IINC, new int[]{0, 1});
+ //mg.add(ILOAD_0);
+ mg.add(GETSTATIC, cg.fieldRef(me, "foo", Type.INT));
+ mg.addPushConst(1);
+ mg.add(IADD);
+ mg.add(DUP);
+ mg.add(PUTSTATIC, cg.fieldRef(me, "foo", Type.INT));
+ mg.addPushConst(10);
+ mg.add(IF_ICMPLT, top);
+ mg.add(RETURN);
+ cg.dump("Test.class");
+ */
+ }
+ }
}
private final ClassGen.AttrGen attrs;
private Object constantValue;
+
+ public String toString() { StringBuffer sb = new StringBuffer(); toString(sb); return sb.toString(); }
+ public void toString(StringBuffer sb) {
+ sb.append(ClassGen.flagsToString(flags));
+ sb.append(type.humanReadable());
+ sb.append(" ");
+ sb.append(name);
+ sb.append(";");
+ // FIXME: attrs
+ }
- FieldGen(DataInput in) { throw new Error("Brian is lame"); }
+ FieldGen(CPGen cp, DataInput in) throws IOException {
+ this.cp = cp;
+ flags = in.readShort();
+ name = cp.getUtf8ByIndex(in.readShort());
+ type = cp.getType(in.readShort());
+ attrs = new ClassGen.AttrGen(cp, in);
+ }
+
FieldGen(ClassGen owner, String name, Type type, int flags) {
if((flags & ~(ACC_PUBLIC|ACC_PRIVATE|ACC_PROTECTED|ACC_VOLATILE|ACC_TRANSIENT|ACC_STATIC|ACC_FINAL)) != 0)
throw new IllegalArgumentException("invalid flags");
private byte[] op;
private Object[] arg;
- MethodGen(DataInput in) { throw new Error("Brian is lame"); }
+ public String toString() { StringBuffer sb = new StringBuffer(); toString(sb, "<init>"); return sb.toString(); }
+ public void toString(StringBuffer sb, String constructorName) {
+ sb.append(ClassGen.flagsToString(flags));
+ sb.append(ret.humanReadable());
+ sb.append(" ");
+
+ if (name.equals("<clinit>")) sb.append("static ");
+ else {
+ if (name.equals("<init>")) sb.append(constructorName);
+ else sb.append(name);
+ sb.append("(");
+ for(int i=0; i<args.length; i++)
+ sb.append((i==0?"":", ")+args[i].humanReadable());
+ sb.append(") ");
+ }
+ sb.append("{");
+ sb.append("}");
+ // FIXME: attrs, body
+ }
+
+ MethodGen(CPGen cp, DataInput in) throws IOException {
+ this.cp = cp;
+ flags = in.readShort();
+ name = cp.getUtf8ByIndex(in.readShort());
+ String descriptor = cp.getUtf8ByIndex(in.readShort());
+ String ret = descriptor.substring(descriptor.indexOf(')')+1);
+ this.ret = Type.fromDescriptor(ret);
+ //String args = descriptor.substring(1, descriptor.indexOf(')'));
+ args = new Type[0]; // FIXME
+ codeAttrs = null;
+ attrs = new ClassGen.AttrGen(cp, in);
+ }
+
MethodGen(ClassGen owner, String name, Type ret, Type[] args, int flags) {
if((flags & ~(ACC_PUBLIC|ACC_PRIVATE|ACC_PROTECTED|ACC_STATIC|ACC_FINAL|ACC_SYNCHRONIZED|ACC_NATIVE|ACC_ABSTRACT|ACC_STRICT)) != 0)
throw new IllegalArgumentException("invalid flags");
public static final Type[] NO_ARGS = new Type[0];
final String descriptor;
-
+
+ public String humanReadable() {
+ if(descriptor.equals("V")) return "void";
+ if(descriptor.equals("I")) return "int";
+ if(descriptor.equals("J")) return "long";
+ if(descriptor.equals("Z")) return "boolean";
+ if(descriptor.equals("D")) return "double";
+ if(descriptor.equals("F")) return "float";
+ if(descriptor.equals("B")) return "byte";
+ if(descriptor.equals("C")) return "char";
+ if(descriptor.equals("S")) return "short";
+ throw new Error("confounded by Type("+descriptor+")");
+ }
+
protected Type(String descriptor) { this.descriptor = descriptor; }
public static Type fromDescriptor(String descriptor) {
if(descriptor.equals("S")) return SHORT;
if(descriptor.endsWith("[")) return new Type.Array(fromDescriptor(descriptor.substring(0, descriptor.indexOf('['))),
descriptor.length() - descriptor.indexOf('['));
- if(Type.Object.validDescriptorString(descriptor)) return new Type.Object(descriptor);
- return null;
+ return new Type.Object(descriptor);
}
/** Returns the Java descriptor string for this object ("I", or "Ljava/lang/String", "[[J", etc */
*/
public static Type arrayType(Type base, int dim) { return new Type.Array(base, dim); }
+ public String toString() { return getDescriptor(); }
public Type.Object asObject() { throw new RuntimeException("attempted to use "+this+" as a Type.Object, which it is not"); }
public Type.Array asArray() { throw new RuntimeException("attempted to use "+this+" as a Type.Array, which it is not"); }
public boolean isObject() { return false; }
protected Object(String s) { super(_initHelper(s)); }
public Type.Object asObject() { return this; }
public boolean isObject() { return true; }
+ public String humanReadable() { return internalForm().replace('/', '.'); }
+ public String getShortName() {
+ String hr = humanReadable();
+ return hr.substring(hr.lastIndexOf('.')+1);
+ }
private static String _initHelper(String s) {
if(!s.startsWith("L") || !s.endsWith(";")) s = "L" + s.replace('.', '/') + ";";
}
public static class Array extends Object {
- protected Array(Type t, int dim) { super(_initHelper(t, dim)); }
+ private int dim;
+ protected Array(Type t, int dim) { super(_initHelper(t, dim)); this.dim = dim; }
public Type.Array asArray() { return this; }
public boolean isArray() { return true; }
+ public String humanReadable() {
+ String ret = super.internalForm().replace('/', '.');
+ for(int i=0; i<dim; i++) ret += "[]";
+ return ret;
+ }
String internalForm() { throw new Error("Type.Array does not have an internalForm()"); }
String[] components() { throw new Error("Type.Array does not have components()"); }
private static String _initHelper(Type t, int dim) {
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