package org.ibex.classgen;
import java.io.*;
+import java.util.*;
+/** A class representing a method in a generated classfile
+ @see ClassFile#addMethod */
public class MethodGen implements CGConst {
- private final static boolean EMIT_NOPS = true;
+ private final static boolean EMIT_NOPS = false;
- private final CPGen cp;
- private final String name;
- private final Type ret;
- private final Type[] args;
+ private static final int NO_CODE = -1;
+
+ private final Type.Class.Method method;
private final int flags;
- private final AttrGen attrs;
- private final AttrGen codeAttrs;
-
- private final int nameIndex;
- private final int descriptorIndex;
+ private final ClassFile.AttrGen attrs;
+ private final ClassFile.AttrGen codeAttrs;
+ private final Vector exnTable = new Vector();
+ private final Hashtable thrownExceptions = new Hashtable();
private int maxStack = 16;
- private int maxLocals=1;
+ private int maxLocals;
private int size;
private int capacity;
private byte[] op;
private Object[] arg;
+ private ConstantPool.Ent[] cparg;
- 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");
- this.cp = owner.cp;
- this.name = name;
- this.ret = ret;
- this.args = args;
+ // Constructors //////////////////////////////////////////////////////////////////////////////
+
+ MethodGen(Type.Class.Method method, int flags) {
+ if ((flags & ~VALID_METHOD_FLAGS) != 0) throw new IllegalArgumentException("invalid flags");
+ this.method = method;
this.flags = flags;
- attrs = new AttrGen(cp);
- codeAttrs = new AttrGen(cp);
+ attrs = new ClassFile.AttrGen();
+ codeAttrs = new ClassFile.AttrGen();
- nameIndex = cp.addUtf8(name).index;
- descriptorIndex = cp.addUtf8(descriptor()).index;
+ if (((flags & INTERFACE) != 0) || (flags & (ABSTRACT|NATIVE)) != 0) size = capacity = -1;
- if((owner.flags & ACC_INTERFACE) != 0 || (flags & (ACC_ABSTRACT|ACC_NATIVE)) != 0) size = capacity = -1;
+ maxLocals = Math.max(args.length + (flags&STATIC)==0 ? 1 : 0, 4);
}
-
- public String descriptor() { return descriptor(ret,args); }
- public static String descriptor(Type ret, Type[] args) {
- StringBuffer sb = new StringBuffer(args.length*4);
- sb.append("(");
- for(int i=0;i<args.length;i++) sb.append(args[i].getDescriptor());
- sb.append(")");
- sb.append(ret.getDescriptor());
- return sb.toString();
+
+ MethodGen(Type.Class c, DataInput in, ConstantPool cp) throws IOException {
+ this.flags = in.readShort();
+ if ((flags & ~VALID_METHOD_FLAGS) != 0) throw new ClassFile.ClassReadExn("invalid flags");
+ String name = cp.getUtf8KeyByIndex(in.readShort());
+ this.method = c.method(name+cp.getUtf8KeyByIndex(in.readShort()));
+ this.attrs = new ClassFile.AttrGen(in,cp);
+
+ if ((flags & (NATIVE|ABSTRACT))==0) {
+ byte[] codeAttr = (byte[]) attrs.get("Code");
+ if (codeAttr == null) throw new ClassFile.ClassReadExn("code attr expected");
+ DataInputStream ci = new DataInputStream(new ByteArrayInputStream(codeAttr));
+ maxStack = ci.readUnsignedShort();
+ maxLocals = ci.readUnsignedShort();
+ int codeLen = ci.readInt();
+ int[] bytecodeMap = parseCode(ci,codeLen,cp);
+ int numExns = ci.readUnsignedShort();
+ while(numExns-- > 0)
+ exnTable.addElement(new ExnTableEnt(ci,cp,bytecodeMap));
+ codeAttrs = new ClassFile.AttrGen(ci,cp);
+ // FEATURE: Support these
+ // NOTE: Until we can support them properly we HAVE to delete them,
+ // they'll be incorrect after we rewrite the constant pool, etc
+ codeAttrs.remove("LineNumberTable");
+ codeAttrs.remove("LocalVariableTable");
+
+ } else {
+ codeAttrs = new ClassFile.AttrGen();
+ }
+
+ if (attrs.contains("Exceptions")) {
+ DataInputStream ei = new DataInputStream(new ByteArrayInputStream((byte[]) attrs.get("Exceptions")));
+ int exnCount = ei.readUnsignedShort();
+ while(exnCount-- > 0) {
+ Type.Class t = (Type.Class) cp.getKeyByIndex(ei.readUnsignedShort());
+ thrownExceptions.put(t,t);
+ }
+ }
+ }
+
+ // Parsing //////////////////////////////////////////////////////////////////////////////
+
+ final int[] parseCode(DataInputStream in, int codeLen, ConstantPool cp) throws IOException {
+ int[] map = new int[codeLen];
+ int pc;
+ for(pc=0;pc<map.length;pc++) map[pc] = -1;
+ for(pc=0;pc<codeLen;) {
+ byte op = in.readByte();
+ int opdata = OP_DATA[op&0xff];
+ //System.err.println("Processing " + Integer.toString(op&0xff,16) + " at " + pc);
+ if ((opdata&OP_VALID_FLAG)==0) throw new ClassFile.ClassReadExn("invalid bytecode " + (op&0xff));
+ int argLength = opdata & OP_ARG_LENGTH_MASK;
+ int mypc = pc;
+ map[mypc] = size();
+ pc += 1 + (argLength == 7 ? 0 : argLength);
+ if (argLength == 0) { add(op); continue; }
+ Object arg;
+ switch(op) {
+ case IINC:
+ arg = new Pair(in.readUnsignedByte(),in.readByte());
+ break;
+ case TABLESWITCH:
+ case LOOKUPSWITCH:
+ Switch si;
+ for(;(pc&3) != 0;pc++) if (in.readByte() != 0) throw new ClassFile.ClassReadExn("invalid padding");
+ int def = in.readInt() + mypc;
+ pc += 4;
+ if (op == LOOKUPSWITCH) {
+ Switch.Lookup lsi = new Switch.Lookup(in.readInt());
+ pc += 4;
+ for(int i=0;i<lsi.size();i++) {
+ lsi.setVal(i,in.readInt());
+ lsi.setTarget(i,in.readInt() + mypc);
+ pc += 8;
+ }
+ si = lsi;
+ } else {
+ int lo = in.readInt();
+ int hi = in.readInt();
+ pc += 8;
+ Switch.Table tsi = new Switch.Table(lo,hi);
+ for(int i=0;i<tsi.size();i++) { tsi.setTarget(i,in.readInt() + mypc); pc += 4; }
+ si = tsi;
+ }
+ si.setDefaultTarget(def);
+ arg = si;
+ break;
+ case WIDE: {
+ byte wideop = in.readByte();
+ arg = wideop == IINC
+ ? new Wide(wideop,in.readUnsignedShort(),in.readShort())
+ : new Wide(wideop,in.readUnsignedShort());
+ pc += wideop == IINC ? 5 : 3;
+ break;
+ }
+ case MULTIANEWARRAY:
+ arg = new MultiANewArray((Type.Class)cp.getKeyByIndex(in.readUnsignedShort()),in.readUnsignedByte());
+ break;
+ case INVOKEINTERFACE: {
+ ConstantPool.Ent ent = cp.getByIndex(in.readUnsignedShort());
+ if (ent.tag != CONSTANT_INTERFACEMETHODREF) throw new ClassFile.ClassReadExn("illegal argument to bytecode");
+ arg = ((ConstantPool.InterfaceMethodKey)ent.key()).method;
+ if (in.readByte() == 0 || in.readByte() != 0) throw new ClassFile.ClassReadExn("illegal count or 0 arg to invokeinterface");
+ break;
+ }
+ default:
+ if ((opdata&OP_CPENT_FLAG)!=0) {
+ ConstantPool.Ent ent = cp.getByIndex(argLength == 2 ? in.readUnsignedShort() : argLength == 1 ? in.readUnsignedByte() : -1);
+ int tag = ent.tag;
+ Object key = ent.key();
+ switch(op) {
+ case LDC:
+ case LDC_W:
+ case LDC2_W:
+ switch(tag) {
+ case CONSTANT_INTEGER:
+ case CONSTANT_FLOAT:
+ case CONSTANT_LONG:
+ case CONSTANT_DOUBLE:
+ case CONSTANT_STRING:
+ case CONSTANT_CLASS:
+ break;
+ default:
+ throw new ClassFile.ClassReadExn("illegal argument to bytecode 0x" + Integer.toString(op&0xff,16));
+ }
+ break;
+ case GETSTATIC:
+ case PUTSTATIC:
+ case GETFIELD:
+ case PUTFIELD:
+ if (tag != CONSTANT_FIELDREF) throw new ClassFile.ClassReadExn("illegal argument to bytecode 0x" + Integer.toString(op&0xff,16));
+ break;
+ case INVOKEVIRTUAL:
+ case INVOKESPECIAL:
+ case INVOKESTATIC:
+ if (tag != CONSTANT_METHODREF) throw new ClassFile.ClassReadExn("illegal argument to bytecode 0x" + Integer.toString(op&0xff,16));
+ break;
+ case NEW:
+ case ANEWARRAY:
+ case CHECKCAST:
+ case INSTANCEOF:
+ if (tag != CONSTANT_CLASS) throw new ClassFile.ClassReadExn("illegal argument to bytecode 0x" + Integer.toString(op&0xff,16));
+ break;
+ default:
+ throw new Error("should never happen");
+ }
+ arg = key;
+ } else {
+ // treat everything else (including branches for now) as plain old ints
+ int n;
+ boolean unsigned = (opdata&OP_UNSIGNED_FLAG)!=0;
+ if (argLength == 1) n = unsigned ? in.readUnsignedByte() : in.readByte();
+ else if (argLength == 2) n = unsigned ? in.readUnsignedShort() : in.readShort();
+ else throw new Error("should never happen");
+ if ((opdata&OP_BRANCH_FLAG)!=0) n += mypc;
+ arg = N(n);
+ }
+ break;
+ }
+ add(op,arg);
+ }
+ if (pc != codeLen)
+ throw new ClassFile.ClassReadExn("didn't read enough code (" + pc + "/" + codeLen + " in " + method.name + ")");
+ for(int i=0;i<size();i++) {
+ switch(op[i]) {
+ case TABLESWITCH:
+ case LOOKUPSWITCH:
+ {
+ Switch si = (Switch) arg[i];
+
+ int pos = map[si.getDefaultTarget()];
+ if (pos < 0) throw new ClassFile.ClassReadExn("default target points to invalid bytecode: " + si.getDefaultTarget());
+ si.setDefaultTarget(pos);
+
+ for(int j=0;j<si.size();j++) {
+ pos = map[si.getTarget(j)];
+ if (pos < 0) throw new ClassFile.ClassReadExn("target points to invalid bytecode");
+ si.setTarget(j,pos);
+ }
+ break;
+ }
+ default:
+ if (OP_BRANCH(op[i])) {
+ int pos = map[((Integer)arg[i]).intValue()];
+ if (pos < 0) throw new ClassFile.ClassReadExn("branch points to invalid bytecode");
+ arg[i] = N(pos);
+ }
+ break;
+ }
+ }
+ return map;
}
+
+ // Exception Table //////////////////////////////////////////////////////////////////////////////
+
+ class ExnTableEnt {
+ final int start;
+ final int end;
+ final int handler;
+ final Type.Class type; // null type means all exceptions (for finally)
- private final void grow() { if(size == capacity) grow(size+1); }
+ ExnTableEnt(DataInput in, ConstantPool cp, int[] bytecodeMap) throws IOException {
+ int startPC = in.readUnsignedShort();
+ int endPC = in.readUnsignedShort();
+ int handlerPC = in.readUnsignedShort();
+ int index = in.readUnsignedShort();
+ this.type = index == 0 ? null : (Type.Class) cp.getKeyByIndex(index);
+ int max = bytecodeMap.length;
+ if (startPC >= max || bytecodeMap[startPC] < 0) throw new ClassFile.ClassReadExn("invalid startPC");
+ if (endPC >= max || bytecodeMap[endPC] < 0) throw new ClassFile.ClassReadExn("invalid startPC");
+ if (handlerPC >= max || bytecodeMap[handlerPC] < 0) throw new ClassFile.ClassReadExn("invalid startPC");
+ this.start = bytecodeMap[startPC];
+ this.end = bytecodeMap[endPC];
+ this.handler = bytecodeMap[handlerPC];
+ }
+ ExnTableEnt(int start, int end, int handler, Type.Class type) {
+ this.start = start;
+ this.end = end;
+ this.handler = handler;
+ this.type = type;
+ }
+ void finish(ConstantPool cp) { if (type != null) cp.add(type); }
+ void dump(DataOutput o, int[] pc, int endPC, ConstantPool cp) throws IOException {
+ o.writeShort(pc[start]);
+ o.writeShort(end==pc.length ? endPC : pc[end]);
+ o.writeShort(pc[handler]);
+ o.writeShort(type == null ? 0 : cp.getIndex(type));
+ }
+ }
+
+ /** Adds an exception handler for the range [<i>start</i>, <i>end</i>) pointing to <i>handler</i>
+ @param start The instruction to start at (inclusive)
+ @param end The instruction to end at (exclusive)
+ @param handler The instruction of the excepton handler
+ @param type The type of exception that is to be handled (MUST inherit from Throwable)
+ */
+ public final void addExceptionHandler(int start, int end, int handler, Type.Class type) {
+ exnTable.addElement(new ExnTableEnt(start, end, handler, type));
+ }
+
+ /** Adds a exception type that can be thrown from this method
+ NOTE: This isn't enforced by the JVM. This is for reference only. A method can throw exceptions not declared to be thrown
+ @param type The type of exception that can be thrown
+ */
+ public final void addThrow(Type.Class type) { thrownExceptions.put(type, type); }
+
+ private final void grow() { if (size == capacity) grow(size+1); }
private final void grow(int newCap) {
- if(newCap <= capacity) return;
- newCap = Math.max(newCap,capacity == 0 ? 256 : capacity*2);
+ if (capacity == NO_CODE) throw new IllegalStateException("method can't have code");
+ if (newCap <= capacity) return;
+ newCap = Math.max(newCap, capacity == 0 ? 256 : capacity*2);
byte[] op2 = new byte[newCap];
- if(capacity != 0) System.arraycopy(op,0,op2,0,size);
+ if (capacity != 0) System.arraycopy(op, 0, op2, 0, size);
op = op2;
Object[] arg2 = new Object[newCap];
- if(capacity != 0) System.arraycopy(arg,0,arg2,0,size);
+ if (capacity != 0) System.arraycopy(arg, 0, arg2, 0, size);
arg = arg2;
capacity = newCap;
}
+
+ // Accessors //////////////////////////////////////////////////////////////////////////////
+
+ /** Returns the size (in instructions) of this method
+ @return The size of the method (in instructions)
+ */
public final int size() { return size; }
- public final int addPushConst(int n) { grow(); setPushConst(size,n); return size++; }
- public final int addPushConst(long n) { grow(); setPushConst(size,n); return size++; }
- public final int addPushConst(float n) { grow(); setPushConst(size,n); return size++; }
- public final int addPushConst(double n) { grow(); setPushConst(size,n); return size++; }
- public final int addPushConst(Object o) { grow(); setPushConst(size,o); return size++; }
- public final int add(byte op, int arg) { return add(op,N(arg)); }
- public final int add(byte op, Object arg) { grow(); set(size,op,arg); return size++; }
- public final int add(byte op) { return add(op,null); }
+ // These two are optimized for speed, they don't call set() below
+ /** Add a bytecode (with no argument) to the method */
+ public final int add(byte op) {
+ int s = size;
+ if (s == capacity) grow();
+ this.op[s] = op;
+ size++;
+ return s;
+ }
+ /** Set the bytecode at position <i>pos</i> to <i>op</i> */
+ public final void set(int pos, byte op) { this.op[pos] = op; }
- public final void set(int pos, byte op) { set(pos,op,null); }
- public final void set(int pos, byte op, int n) { set(pos,op,N(n)); }
+ /** Adds a bytecode, <i>op</i>, with argument <i>arg</i> to the method
+ @return The position of the new bytecode
+ */
+ public final int add(byte op, Object arg) { if (capacity == size) grow(); set(size, op, arg); return size++; }
+ /** Adds a bytecode with a boolean argument - equivalent to add(op, arg?1:0);
+ @return The position of the new bytecode
+ @see #add(byte, int)
+ */
+ public final int add(byte op, boolean arg) { if (capacity == size) grow(); set(size, op, arg); return size++; }
+ /** Adds a bytecode with an integer argument. This is equivalent to add(op, new Integer(arg)), but optimized to prevent the allocation when possible
+ @return The position of the new bytecode
+ @see #add(byte, Object)
+ */
+ public final int add(byte op, int arg) { if (capacity == size) grow(); set(size, op, arg); return size++; }
+
+ /** Gets the bytecode at position <i>pos</i>
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ */
+ public final byte get(int pos) { return op[pos]; }
+
+ /** Gets the bytecode at position <i>pos</i>. NOTE: This isn't necessarily the same object that was set with add or set.
+ Arguments for instructions which access the constant pool (LDC, INVOKEVIRTUAL, etc) are converted to a more efficient
+ interal form when they are added. The value returned from this method for these instruction can be reused, but there
+ is no way to retrieve the original object
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ */
+ public final Object getArg(int pos) { return arg[pos]; }
+
+ /** Sets the argument for <i>pos</i> to <i>arg</i>. This is equivalent to set(pos, op, new Integer(arg)), but optimized to prevent the allocation when possible.
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ @see #setArg(int, Object) */
+ public final void setArg(int pos, int arg) { set(pos, op[pos], N(arg)); }
+ /** Sets the argument for <i>pos</i> to <i>arg</i>.
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ */
+ public final void setArg(int pos, Object arg) { set(pos, op[pos], arg); }
+
+ /** Sets the bytecode and argument at <i>pos</i> to <i>op</i> and <i>arg</i> respectivly.
+ This is equivalent to set(pos, op, arg?1:0)
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ */
+ public final void set(int pos, byte op, boolean arg) { set(pos, op, arg?1:0); }
+
+ // This MUST handle x{LOAD, STORE} and LDC with an int arg WITHOUT falling back to set(int, byte, Object)
+ /** Sets the bytecode and argument at <i>pos</i> to <i>op</i> and <i>n</i> respectivly.
+ This is equivalent to set(pos, op, new Integer(n)), but optimized to prevent the allocation when possible.
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ */
+ public final void set(int pos, byte op, int n) {
+ Object arg = null;
+ OUTER: switch(op) {
+ case LDC:
+ switch(n) {
+ case -1: op = ICONST_M1; break OUTER;
+ case 0: op = ICONST_0; break OUTER;
+ case 1: op = ICONST_1; break OUTER;
+ case 2: op = ICONST_2; break OUTER;
+ case 3: op = ICONST_3; break OUTER;
+ case 4: op = ICONST_4; break OUTER;
+ case 5: op = ICONST_5; break OUTER;
+ }
+ if (n >= -128 && n <= 127) { op = BIPUSH; arg = N(n); }
+ else if (n >= -32768 && n <= 32767) { op = SIPUSH; arg = N(n); }
+ else { arg = N(n); }
+ break;
+ case ILOAD: case ISTORE: case LLOAD: case LSTORE: case FLOAD:
+ case FSTORE: case DLOAD: case DSTORE: case ALOAD: case ASTORE:
+ if (n >= maxLocals) maxLocals = n + 1;
+ if (n >= 0 && n <= 3) {
+ byte base = 0;
+ switch(op) {
+ case ILOAD: base = ILOAD_0; break;
+ case ISTORE: base = ISTORE_0; break;
+ case LLOAD: base = LLOAD_0; break;
+ case LSTORE: base = LSTORE_0; break;
+ case FLOAD: base = FLOAD_0; break;
+ case FSTORE: base = FSTORE_0; break;
+ case DLOAD: base = DLOAD_0; break;
+ case DSTORE: base = DSTORE_0; break;
+ case ALOAD: base = ALOAD_0; break;
+ case ASTORE: base = ASTORE_0; break;
+ }
+ op = (byte)((base&0xff) + n);
+ } else {
+ arg = N(n);
+ }
+ break;
+ default:
+ set(pos, op, N(n));
+ return;
+ }
+ this.op[pos] = op;
+ this.arg[pos] = arg;
+ }
+
+ /** Sets the bytecode and argument at <i>pos</i> to <i>op</i> and <i>arg</i> respectivly.
+ @exception ArrayIndexOutOfBoundException if pos < 0 || pos >= size()
+ */
public final void set(int pos, byte op, Object arg) {
- if(capacity == -1) throw new IllegalStateException("method can't have code");
- if(size == -1) throw new IllegalStateException("method is finalized");
- int iarg = arg instanceof Integer ? ((Integer)arg).intValue() : -1;
-
switch(op) {
- case LDC: if(iarg >= 256) op = LDC_W; break;
+ case ILOAD: case ISTORE: case LLOAD: case LSTORE: case FLOAD:
+ case FSTORE: case DLOAD: case DSTORE: case ALOAD: case ASTORE:
+ // set(int, byte, int) always handles these ops itself
+ set(pos, op, ((Integer)arg).intValue());
+ return;
+ case LDC:
+ // set(int, byte, int) always handles these opts itself
+ if (arg instanceof Integer) { set(pos, op, ((Integer)arg).intValue()); return; }
+ if (arg instanceof Boolean) { set(pos, op, ((Boolean)arg).booleanValue()); return; }
+
+ if (arg instanceof Long) {
+ long l = ((Long)arg).longValue();
+ if (l == 0L || l == 1L) {
+ this.op[pos] = l == 0L ? LCONST_0 : LCONST_1;
+ this.arg[pos] = null;
+ return;
+ }
+ op = LDC2_W;
+ } else if (arg instanceof Double) {
+ op = LDC2_W;
+ }
+ break;
}
+ if ((OP_DATA[op&0xff]&OP_VALID_FLAG) == 0) throw new IllegalArgumentException("unknown bytecode");
this.op[pos] = op;
this.arg[pos] = arg;
}
+
+ public static abstract class Switch {
+ public final Object[] targets;
+ public Object defaultTarget;
+
+ Switch(int size) { targets = new Object[size]; }
+ public void setTarget(int pos, Object val) { targets[pos] = val; }
+ public void setTarget(int pos, int val) { targets[pos] = N(val); }
+ public void setDefaultTarget(int val) { setDefaultTarget(N(val)); }
+ public void setDefaultTarget(Object o) { defaultTarget = o; }
+ public int size() { return targets.length; }
- public final void setPushConst(int pos, int n) {
- switch(n) {
- case -1: set(pos,ICONST_M1); break;
- case 0: set(pos,ICONST_0); break;
- case 1: set(pos,ICONST_1); break;
- case 2: set(pos,ICONST_2); break;
- case 3: set(pos,ICONST_3); break;
- case 4: set(pos,ICONST_4); break;
- case 5: set(pos,ICONST_5); break;
- default:
- if(n >= -128 && n <= 127) set(pos,BIPUSH,n);
- if(n >= -32767 && n <= 32767) set(pos,SIPUSH,n);
- setLDC(pos,N(n));
- break;
+ public int getTarget(int pos) { return ((Integer)targets[pos]).intValue(); }
+ public int getDefaultTarget() { return ((Integer)defaultTarget).intValue(); }
+
+ abstract int length();
+
+ public static class Table extends Switch {
+ public final int lo;
+ public final int hi;
+ public Table(int lo, int hi) {
+ super(hi-lo+1);
+ this.lo = lo;
+ this.hi = hi;
+ }
+ public void setTargetForVal(int val, Object o) { setTarget(val-lo, o); }
+ public void setTargetForVal(int val, int n) { setTarget(val-lo, n); }
+
+ int length() { return 12 + targets.length * 4; } // 4bytes/target, hi, lo, default
+ }
+
+ public static class Lookup extends Table {
+ public final int[] vals;
+ public Lookup(int size) {
+ super(size);
+ this.vals = new int[size];
+ }
+ public final void setVal(int pos, int val) { vals[pos] = val; }
+
+ int length() { return 8 + targets.length * 8; } // key/val per target, default, count
}
- }
- public final void setPushConst(int pos, long l) {
- if(l==0) set(pos,LCONST_0);
- else if(l==1) set(pos,LCONST_1);
- else setLDC(pos,N(l));
}
- public final void setPushConst(int pos, float f) {
- if(f == 1.0f) set(pos,FCONST_0);
- else if(f == 1.0f) set(pos,FCONST_1);
- else if(f == 2.0f) set(pos,FCONST_2);
- else setLDC(pos,N(f));
+ /** This class represents the arguments to byecodes that take two integer arguments. */
+ public static class Pair {
+ public int i1;
+ public int i2;
+ public Pair(int i1, int i2) { this.i1 = i1; this.i2 = i2; }
}
- public final void setPushConst(int pos, double d) {
- if(d == 1.0) set(pos,DCONST_0);
- else if(d == 2.0) set(pos,DCONST_1);
- else setLDC(pos,N(d));
+
+ public static class MultiANewArray {
+ public Type.Class type;
+ public int dims;
+ public MultiANewArray(Type.Class type, int dims) { this.type = type; this.dims = dims; }
}
- public final void setPushConst(int pos, Object o) {
- if(o instanceof Integer) setPushConst(pos,((Integer)o).intValue());
- else if(o instanceof Long) setPushConst(pos,((Long)o).longValue());
- else if(o instanceof Float) setPushConst(pos,((Float)o).floatValue());
- else if(o instanceof Double) setPushConst(pos,((Double)o).doubleValue());
- else setLDC(pos,o);
+
+ public static class Wide {
+ public final byte op;
+ public final int varNum;
+ public final int n;
+ Wide(byte op, int varNum) { this(op, varNum, 0); }
+ Wide(byte op, int varNum, int n) { this.op = op; this.varNum = varNum; this.n = n; }
}
- private void setLDC(int pos, Object o) { set(pos,LDC,cp.add(o)); }
-
- public final CPGen.Ent methodRef(Type.Object c, String name, Type ret, Type[] args) {
- return methodRef(c,name,MethodGen.descriptor(ret,args));
- }
- public final CPGen.Ent methodRef(Type.Object c, String name, String descriptor) {
- return cp.add(new CPGen.MethodRef(c,new CPGen.NameAndType(name,descriptor)));
- }
- public final CPGen.Ent fieldRef(Type.Object c, String name, Type type) {
- return fieldRef(c,name,type.getDescriptor());
- }
- public final CPGen.Ent fieldRef(Type.Object c, String name, String descriptor) {
- return cp.add(new CPGen.FieldRef(c,new CPGen.NameAndType(name,descriptor)));
- }
-
+ /** Sets the maximum number of locals in the function to <i>maxLocals</i>. NOTE: This defaults to 0 and is automatically increased as
+ necessary when *LOAD/*STORE bytecodes are added. You do not need to call this function in most cases */
public void setMaxLocals(int maxLocals) { this.maxLocals = maxLocals; }
+ /** Sets the maxinum size of th stack for this function to <i>maxStack</i>. This defaults to 16< */
public void setMaxStack(int maxStack) { this.maxStack = maxStack; }
- public void finish() {
+ /** Computes the final bytecode for this method.
+ @exception IllegalStateException if the data for a method is in an inconsistent state (required arguments missing, etc)
+ @exception Exn if the byteocode could not be generated for any other reason (constant pool full, etc)
+ */
+ void finish(ConstantPool cp) {
+ cp.addUtf8(method.name);
+ cp.addUtf8(method.getDescriptor());
+
+ for(Enumeration e = thrownExceptions.keys();e.hasMoreElements();)
+ cp.add(e.nextElement());
+
+ if (size == NO_CODE) return;
+ for(int i=0;i<exnTable.size();i++)
+ ((ExnTableEnt)exnTable.elementAt(i)).finish(cp);
+
+ // We'll set these correctly later
+ if ((flags & (NATIVE|ABSTRACT))==0) attrs.put("Code","");
+ if (thrownExceptions.size() > 0) attrs.put("Exceptions","");
+ attrs.finish(cp);
+ codeAttrs.finish(cp);
+
+ cparg = new ConstantPool.Ent[size];
+
+ for(int i=0, p=0;i<size;i++) {
+ switch(op[i]) {
+ case LDC:
+ case LDC_W:
+ case LDC2_W:
+ case GETSTATIC:
+ case PUTSTATIC:
+ case GETFIELD:
+ case PUTFIELD:
+ case INVOKEVIRTUAL:
+ case INVOKESPECIAL:
+ case INVOKESTATIC:
+ case NEW:
+ case ANEWARRAY:
+ case CHECKCAST:
+ case INSTANCEOF:
+ cparg[i] = cp.add(arg[i]);
+ break;
+ case INVOKEINTERFACE:
+ cparg[i] = cp.add(new ConstantPool.InterfaceMethodKey((Type.Class.Method)arg[i]));
+ break;
+ case MULTIANEWARRAY:
+ cparg[i] = cp.add(((MultiANewArray)arg[i]).type);
+ break;
+ }
+ }
+ }
+
+ private Object resolveTarget(Object arg) {
+ int target;
+ if (arg instanceof PhantomTarget) {
+ target = ((PhantomTarget)arg).getTarget();
+ if (target == -1) throw new IllegalStateException("unresolved phantom target");
+ arg = N(target);
+ } else {
+ target = ((Integer)arg).intValue();
+ }
+ if (target < 0 || target >= size)
+ throw new IllegalStateException("invalid target address " + target + "/" + size);
+ return arg;
+ }
+
+ private void generateCode(ConstantPool cp) {
try {
- _finish();
+ _generateCode(cp);
} catch(IOException e) {
throw new Error("should never happen");
}
}
- private void _finish() throws IOException {
- if(size == -1) return;
-
+ private void _generateCode(ConstantPool cp) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutput o = new DataOutputStream(baos);
int[] pc = new int[size];
int[] maxpc = pc;
- int p,i;
+ int p, i;
- // Pass1 - Calculate maximum pc of each bytecode
- for(i=0,p=0;i<size;i++) {
+ // Pass1 - Calculate maximum pc of each bytecode, widen some insns, resolve any unresolved jumps, etc
+ for(i=0, p=0;i<size;i++) {
byte op = this.op[i];
+ int opdata = OP_DATA[op&0xff];
+ int j;
maxpc[i] = p;
+
+ if ((opdata & OP_BRANCH_FLAG)!= 0) {
+ try {
+ arg[i] = resolveTarget(arg[i]);
+ } catch(RuntimeException e) {
+ System.err.println("WARNING: Error resolving target for " + Integer.toHexString(op&0xff));
+ throw e;
+ }
+ }
+
switch(op) {
- case GOTO: p += 3; break;
- case JSR: p += 3; break;
- case NOP: if(!EMIT_NOPS) continue; /* fall though */
- default: p += 1 + opArgLength(op); break;
+ // Speical caculations
+ case GOTO:
+ case JSR: {
+ int arg = ((Integer)this.arg[i]).intValue();
+ if (arg < i && p - maxpc[arg] <= 32768) p += 3;
+ else p += 5;
+ continue;
+ }
+ case NOP:
+ if (EMIT_NOPS) p++;
+ continue;
+ case LOOKUPSWITCH:
+ case TABLESWITCH: {
+ Switch si = (Switch) arg[i];
+ Object[] targets = si.targets;
+ for(j=0;j<targets.length;j++) targets[j] = resolveTarget(targets[j]);
+ si.defaultTarget = resolveTarget(si.defaultTarget);
+ p += 1 + 3 + si.length(); // opcode itself, padding, data
+ if (op == LOOKUPSWITCH) { // verify sanity of lookupswitch vals
+ int[] vals = ((Switch.Lookup)si).vals;
+ for(j=1;j<vals.length;j++)
+ if (vals[j] <= vals[j-1])
+ throw new IllegalStateException("out of order/duplicate lookupswitch values");
+ }
+ continue;
+ }
+ case WIDE:
+ p += ((Wide)arg[i]).op == IINC ? 5 : 3;
+ continue;
+ // May need widening
+ case ILOAD: case ISTORE: case LLOAD: case LSTORE: case FLOAD:
+ case FSTORE: case DLOAD: case DSTORE: case ALOAD: case ASTORE:
+ case RET: {
+ int arg = ((Integer)this.arg[i]).intValue();
+ if (arg > 255) {
+ this.op[i] = WIDE;
+ this.arg[i] = new Wide(op, arg);
+ p += 4;
+ continue;
+ }
+ break;
+ }
+ case IINC: {
+ Pair pair = (Pair) this.arg[i];
+ if (pair.i1 > 255 || pair.i2 < -128 || pair.i2 > 127) {
+ this.op[i] = WIDE;
+ this.arg[i] = new Wide(IINC, pair.i1, pair.i2);
+ p += 6;
+ continue;
+ }
+ break;
+ }
+ case LDC:
+ j = cp.getIndex(cparg[i]);
+ if (j >= 256) {
+ this.op[i] = op = LDC_W;
+ p += 3;
+ continue;
+ }
+ break;
+ default:
}
+ if ((j = (opdata&OP_ARG_LENGTH_MASK)) == 7) throw new Error("shouldn't be here " + Integer.toString(op&0xff,16));
+ p += 1 + j;
}
+
// Pass2 - Widen instructions if they can possibly be too short
for(i=0;i<size;i++) {
switch(op[i]) {
case JSR: {
int arg = ((Integer)this.arg[i]).intValue();
int diff = maxpc[arg] - maxpc[i];
- if(diff < -32768 || diff > 32767)
+ if (diff < -32768 || diff > 32767)
op[i] = op[i] == GOTO ? GOTO_W : JSR_W;
+ break;
}
}
}
+
// Pass3 - Calculate actual pc
- for(i=0,p=0;i<size;i++) {
+ for(i=0, p=0;i<size;i++) {
byte op = this.op[i];
pc[i] = p;
- p += op != NOP || EMIT_NOPS ? 1 + opArgLength(op) : 0;
+ switch(op) {
+ case NOP:
+ if (EMIT_NOPS) p++;
+ break;
+ case TABLESWITCH:
+ case LOOKUPSWITCH: {
+ Switch si = (Switch) arg[i];
+ p++; // opcode itself
+ p = (p + 3) & ~3; // padding
+ p += 4; // default
+ if (op == TABLESWITCH) p += 4 + 4 + si.size() * 4; // lo, hi, targets
+ else p += 4 + si.size() * 4 * 2; // count, key, val * targets
+ break;
+ }
+ case WIDE:
+ p += 2 + (((Wide)arg[i]).op == IINC ? 4 : 2);
+ break;
+ default: {
+ int l = OP_DATA[op&0xff] & OP_ARG_LENGTH_MASK;
+ if (l == 7) throw new Error("shouldn't be here");
+ p += 1 + l;
+ }
+ }
}
+ int codeSize = p;
+
+ if (codeSize >= 65536) throw new ClassFile.Exn("method too large in size");
o.writeShort(maxStack);
o.writeShort(maxLocals);
- o.writeInt(p);
+ o.writeInt(codeSize);
// Pass 4 - Actually write the bytecodes
for(i=0;i<size;i++) {
byte op = this.op[i];
- System.err.println("" + i + " Writing " + Integer.toHexString(op) + " at " + pc[i]);
- if(op == NOP && !EMIT_NOPS) continue;
- int argLength = opArgLength(op);
- o.writeByte(op&0xff);
- if(argLength == 0) continue;
- Object arg = this.arg[i];
- int iarg = arg instanceof Integer ? ((Integer)arg).intValue() : -1;
- int outArg = iarg;
+ int opdata = OP_DATA[op&0xff];
+ if (op == NOP && !EMIT_NOPS) continue;
+ o.writeByte(op);
+ int argLength = opdata & OP_ARG_LENGTH_MASK;
+
+ if (argLength == 0) continue; // skip if no args
+
+ // Write args
+ Object arg = this.arg[i];
switch(op) {
case IINC: {
- int[] pair = (int[]) arg;
- if(pair[0] > 255 || pair[1] < -128 || pair[1] > 127) throw new ClassGen.Exn("overflow of iinc arg");
- o.writeByte(pair[0]);
- o.writeByte(pair[1]);
- continue;
+ Pair pair = (Pair) arg;
+ if (pair.i1 > 255 || pair.i2 < -128 || pair.i2 > 127) throw new ClassFile.Exn("overflow of iinc arg");
+ o.writeByte(pair.i1);
+ o.writeByte(pair.i2);
+ break;
}
- case IF_ICMPLT:
- case GOTO:
- case GOTO_W:
- case JSR:
- case JSR_W:
- outArg = pc[iarg] - pc[i];
- if(outArg < -32768 || outArg > 32767) throw new ClassGen.Exn("overflow of s2 offset");
+ case TABLESWITCH:
+ case LOOKUPSWITCH: {
+ Switch si = (Switch) arg;
+ int mypc = pc[i];
+ for(p = pc[i]+1;(p&3)!=0;p++) o.writeByte(0);
+ o.writeInt(pc[si.getDefaultTarget()] - mypc);
+ if (op == LOOKUPSWITCH) {
+ int[] vals = ((Switch.Lookup)si).vals;
+ o.writeInt(si.size());
+ for(int j=0;j<si.size();j++) {
+ o.writeInt(vals[j]);
+ o.writeInt(pc[si.getTarget(j)] - mypc);
+ }
+ } else {
+ Switch.Table tsi = (Switch.Table) si;
+ o.writeInt(tsi.lo);
+ o.writeInt(tsi.hi);
+ for(int j=0;j<tsi.size();j++) o.writeInt(pc[tsi.getTarget(j)] - mypc);
+ }
break;
- case INVOKESTATIC:
- case INVOKESPECIAL:
- case INVOKEVIRTUAL:
- case GETSTATIC:
- case PUTSTATIC:
- case GETFIELD:
- case PUTFIELD:
- case LDC_W:
- case LDC:
- outArg = ((CPGen.Ent)arg).index;
+ }
+ case WIDE: {
+ Wide wide = (Wide) arg;
+ o.writeByte(wide.op);
+ o.writeShort(wide.varNum);
+ if (wide.op == IINC) o.writeShort(wide.n);
+ break;
+ }
+ case MULTIANEWARRAY: {
+ o.writeShort(cp.getIndex(cparg[i]));
+ int v = ((MultiANewArray) arg).dims;
+ if (v >= 256) throw new ClassFile.Exn("overflow of dimensions in multianewarray");
+ o.writeByte(v);
+ break;
+ }
+ case INVOKEINTERFACE:
+ o.writeShort(cp.getIndex(cparg[i]));
+ o.writeByte(((Type.Class.Method)arg).argTypes.length + 1);
+ o.writeByte(0);
+ break;
+ default:
+ if ((opdata & OP_BRANCH_FLAG) != 0) {
+ int v = pc[((Integer)arg).intValue()] - pc[i];
+ if (argLength == 2) {
+ if (v < -32768 || v > 32767) throw new ClassFile.Exn("overflow of s2 offset");
+ o.writeShort(v);
+ } else if (argLength == 4) {
+ o.writeInt(v);
+ } else {
+ throw new Error("should never happen");
+ }
+ } else if ((opdata & OP_CPENT_FLAG) != 0) {
+ int v = cp.getIndex(cparg[i]);
+ if (argLength == 1) o.writeByte(v);
+ else if (argLength == 2) o.writeShort(v);
+ else throw new Error("should never happen");
+ } else if (argLength == 7) {
+ throw new Error("should never happen - variable length instruction not explicitly handled");
+ } else {
+ int iarg = ((Integer)arg).intValue();
+ if (argLength == 1) {
+ if ((opdata & OP_UNSIGNED_FLAG) != 0 ? iarg >= 256 : (iarg < -128 || iarg >= 128)) throw new ClassFile.Exn("overflow of s/u1 option");
+ o.writeByte(iarg);
+ } else if (argLength == 2) {
+ if ((opdata & OP_UNSIGNED_FLAG) != 0 ? iarg >= 65536 : (iarg < -32768 || iarg >= 32768)) throw new ClassFile.Exn("overflow of s/u2 option");
+ o.writeShort(iarg);
+ } else {
+ throw new Error("should never happen");
+ }
+ }
break;
}
-
- if(argLength == 1) o.writeByte(outArg);
- else if(argLength == 2) o.writeShort(outArg);
- else throw new Error("should never happen");
}
- o.writeShort(0); // FIXME: Exception table
- o.writeShort(codeAttrs.size());
- codeAttrs.dump(o);
+ //if (baos.size() - 8 != codeSize) throw new Error("we didn't output what we were supposed to");
+
+ o.writeShort(exnTable.size());
+ for(i=0;i<exnTable.size();i++)
+ ((ExnTableEnt)exnTable.elementAt(i)).dump(o, pc, codeSize, cp);
+ codeAttrs.dump(o,cp);
baos.close();
byte[] codeAttribute = baos.toByteArray();
- attrs.add("Code",codeAttribute);
- size = -1;
+ attrs.put("Code", codeAttribute);
+ }
+
+ void generateExceptions(ConstantPool cp) throws IOException {
+ if (thrownExceptions.size() > 0) {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ DataOutputStream o = new DataOutputStream(baos);
+ o.writeShort(thrownExceptions.size());
+ for(Enumeration e = thrownExceptions.keys();e.hasMoreElements();)
+ o.writeShort(cp.getIndex(thrownExceptions.get(e.nextElement())));
+ baos.close();
+ attrs.put("Exceptions", baos.toByteArray());
+ }
}
+
+ void dump(DataOutput o, ConstantPool cp) throws IOException {
+ if ((flags & (NATIVE|ABSTRACT))==0) generateCode(cp);
+ generateExceptions(cp);
- public void dump(DataOutput o) throws IOException {
o.writeShort(flags);
- o.writeShort(nameIndex);
- o.writeShort(descriptorIndex);
- o.writeShort(attrs.size());
- attrs.dump(o);
+ o.writeShort(cp.getUtf8Index(method.name));
+ o.writeShort(cp.getUtf8Index(method.getDescriptor()));
+ attrs.dump(o,cp);
}
- private static int opArgLength(byte op) {
+ /** Negates the IF* instruction, <i>op</i> (IF_ICMPGT -> IF_ICMPLE, IFNE -> IFEQ, etc)
+ @exception IllegalArgumentException if <i>op</i> isn't an IF* instruction */
+ public static byte negate(byte op) {
switch(op) {
- case NOP:
- case ICONST_M1:
- case ICONST_0:
- case ICONST_1:
- case ICONST_2:
- case ICONST_3:
- case ICONST_4:
- case ICONST_5:
- case LCONST_0:
- case LCONST_1:
- case FCONST_0:
- case FCONST_1:
- case FCONST_2:
- case DCONST_0:
- case DCONST_1:
- case ILOAD_0:
- case ILOAD_1:
- case ILOAD_2:
- case ILOAD_3:
- case ISTORE_0:
- case ISTORE_1:
- case ISTORE_2:
- case ISTORE_3:
- case RETURN:
- return 0;
- case LDC:
- case BIPUSH:
- case ILOAD:
- case ISTORE:
- return 1;
- case LDC_W:
- case SIPUSH:
- case GETSTATIC:
- case PUTSTATIC:
- case GETFIELD:
- case PUTFIELD:
- case INVOKESTATIC:
- case INVOKEVIRTUAL:
- case INVOKESPECIAL:
- case IINC:
- case GOTO:
- case JSR:
- case IF_ICMPLT:
- return 2;
+ case IFEQ: return IFNE;
+ case IFNE: return IFEQ;
+ case IFLT: return IFGE;
+ case IFGE: return IFLT;
+ case IFGT: return IFLE;
+ case IFLE: return IFGT;
+ case IF_ICMPEQ: return IF_ICMPNE;
+ case IF_ICMPNE: return IF_ICMPEQ;
+ case IF_ICMPLT: return IF_ICMPGE;
+ case IF_ICMPGE: return IF_ICMPLT;
+ case IF_ICMPGT: return IF_ICMPLE;
+ case IF_ICMPLE: return IF_ICMPGT;
+ case IF_ACMPEQ: return IF_ACMPNE;
+ case IF_ACMPNE: return IF_ACMPEQ;
+
default:
- throw new ClassGen.Exn("unknown bytecode " + Integer.toHexString(op&0xff));
+ throw new IllegalArgumentException("Can't negate " + Integer.toHexString(op));
}
}
-
+
+ /** Class that represents a target that isn't currently know. The target MUST be set with setTarget() before the classfile is written.
+ This class is more or less a mutable integer */
+ public static class PhantomTarget {
+ private int target = -1;
+ public void setTarget(int target) { this.target = target; }
+ public int getTarget() { return target; }
+ }
+
private static Integer N(int n) { return new Integer(n); }
private static Long N(long n) { return new Long(n); }
private static Float N(float f) { return new Float(f); }
private static Double N(double d) { return new Double(d); }
private static int max(int a, int b) { return a > b ? a : b; }
+
+ private static final int OP_BRANCH_FLAG = 1<<3;
+ private static final int OP_CPENT_FLAG = 1<<4;
+ private static final int OP_UNSIGNED_FLAG = 1<<5;
+ private static final int OP_VALID_FLAG = 1<<6;
+ private static final int OP_ARG_LENGTH_MASK = 7;
+ private static final boolean OP_VALID(byte op) { return (OP_DATA[op&0xff] & OP_VALID_FLAG) != 0; }
+ private static final int OP_ARG_LENGTH(byte op) { return (OP_DATA[op&0xff]&OP_ARG_LENGTH_MASK); }
+ private static final boolean OP_CPENT(byte op) { return (OP_DATA[op&0xff]&OP_CPENT_FLAG) != 0; }
+ private static final boolean OP_BRANCH(byte op) { return (OP_DATA[op&0xff]&OP_BRANCH_FLAG ) != 0; }
+ private static final boolean OP_UNSIGNED(byte op) { return (OP_DATA[op&0xff]&OP_UNSIGNED_FLAG ) != 0; }
+
+ // Run perl -x src/org/ibex/classgen/CGConst.java to generate this
+ private static final byte[] OP_DATA = {
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x41, 0x42, 0x51, 0x52, 0x52, 0x61, 0x61, 0x61, 0x61, 0x61, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x61, 0x61, 0x61, 0x61, 0x61, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x42, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a,
+ 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x41, 0x47, 0x47, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x52, 0x52, 0x52, 0x52, 0x52, 0x52, 0x52, 0x54, 0x01, 0x52, 0x41, 0x52, 0x40, 0x40,
+ 0x52, 0x52, 0x40, 0x40, 0x47, 0x53, 0x4a, 0x4a, 0x4c, 0x4c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
+ };
+
+ // Debugging //////////////////////////////////////////////////////////////////////////////
+
+ public void debugToString(StringBuffer sb, String constructorName) {
+ // This is intentionally a local variable so it can be removed by gcclass
+ final String[] OP_NAMES = new String[]{
+ "nop", "aconst_null", "iconst_m1", "iconst_0", "iconst_1", "iconst_2",
+ "iconst_3", "iconst_4", "iconst_5", "lconst_0", "lconst_1", "fconst_0",
+ "fconst_1", "fconst_2", "dconst_0", "dconst_1", "bipush", "sipush",
+ "ldc", "ldc_w", "ldc2_w", "iload", "lload", "fload",
+ "dload", "aload", "iload_0", "iload_1", "iload_2", "iload_3",
+ "lload_0", "lload_1", "lload_2", "lload_3", "fload_0", "fload_1",
+ "fload_2", "fload_3", "dload_0", "dload_1", "dload_2", "dload_3",
+ "aload_0", "aload_1", "aload_2", "aload_3", "iaload", "laload",
+ "faload", "daload", "aaload", "baload", "caload", "saload",
+ "istore", "lstore", "fstore", "dstore", "astore", "istore_0",
+ "istore_1", "istore_2", "istore_3", "lstore_0", "lstore_1", "lstore_2",
+ "lstore_3", "fstore_0", "fstore_1", "fstore_2", "fstore_3", "dstore_0",
+ "dstore_1", "dstore_2", "dstore_3", "astore_0", "astore_1", "astore_2",
+ "astore_3", "iastore", "lastore", "fastore", "dastore", "aastore",
+ "bastore", "castore", "sastore", "pop", "pop2", "dup",
+ "dup_x1", "dup_x2", "dup2", "dup2_x1", "dup2_x2", "swap",
+ "iadd", "ladd", "fadd", "dadd", "isub", "lsub",
+ "fsub", "dsub", "imul", "lmul", "fmul", "dmul",
+ "idiv", "ldiv", "fdiv", "ddiv", "irem", "lrem",
+ "frem", "drem", "ineg", "lneg", "fneg", "dneg",
+ "ishl", "lshl", "ishr", "lshr", "iushr", "lushr",
+ "iand", "land", "ior", "lor", "ixor", "lxor",
+ "iinc", "i2l", "i2f", "i2d", "l2i", "l2f",
+ "l2d", "f2i", "f2l", "f2d", "d2i", "d2l",
+ "d2f", "i2b", "i2c", "i2s", "lcmp", "fcmpl",
+ "fcmpg", "dcmpl", "dcmpg", "ifeq", "ifne", "iflt",
+ "ifge", "ifgt", "ifle", "if_icmpeq", "if_icmpne", "if_icmplt",
+ "if_icmpge", "if_icmpgt", "if_icmple", "if_acmpeq", "if_acmpne", "goto",
+ "jsr", "ret", "tableswitch", "lookupswitch", "ireturn", "lreturn",
+ "freturn", "dreturn", "areturn", "return", "getstatic", "putstatic",
+ "getfield", "putfield", "invokevirtual", "invokespecial", "invokestatic", "invokeinterface",
+ "", "new", "newarray", "anewarray", "arraylength", "athrow",
+ "checkcast", "instanceof", "monitorenter", "monitorexit", "wide", "multianewarray",
+ "ifnull", "ifnonnull", "goto_w", "jsr_w", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", "", "", "",
+ "", "", "", ""
+ };
+
+ sb.append(" ").append(ClassFile.flagsToString(flags,false));
+ sb.append(method.debugToString());
+ if (thrownExceptions.size() > 0) {
+ sb.append("throws");
+ for(Enumeration e = thrownExceptions.keys();e.hasMoreElements();)
+ sb.append(" ").append(((Type.Class)e.nextElement()).debugToString()).append(",");
+ sb.setLength(sb.length()-1);
+ sb.append(" ");
+ }
+ if ((flags & (NATIVE|ABSTRACT))==0) {
+ sb.append("{\n");
+ for(int i=0;i<size();i++) {
+ sb.append(" ");
+ for(int j=i==0?1:i;j<10000;j*=10) sb.append(" ");
+ sb.append(i).append(": ");
+ sb.append(OP_NAMES[op[i]&0xff]);
+ String s = null;
+ if (arg[i] instanceof Type) s = ((Type)arg[i]).debugToString();
+ else if (arg[i] instanceof Type.Class.Member) s = ((Type.Class.Member)arg[i]).toString();
+ else if (arg[i] instanceof String) s = "\"" + s + "\"";
+ else if (arg[i] != null) s = arg[i].toString();
+ if (s != null) sb.append(" ").append(s);
+ sb.append("\n");
+ }
+ sb.append(" }\n");
+ } else {
+ sb.append(";");
+ }
+ }
+
}
projects / org.ibex.classgen.git / blobdiff