1 package org.ibex.classgen;
6 * a highly streamlined SSA-form intermediate representation of a
7 * sequence of JVM instructions; all stack manipulation is factored
10 public class JSSA extends MethodGen implements CGConst {
12 // Constructor //////////////////////////////////////////////////////////////////////////////
14 public JSSA(Type.Class c, DataInput in, ConstantPool cp) throws IOException {
16 local = new Expr[maxLocals];
17 stack = new Expr[maxStack];
20 local[n++] = new Argument("this",method.getDeclaringClass());
21 for(int i=0;i<this.method.getNumArgs(); i++)
22 local[n++] = new Argument("arg"+i, this.method.getArgType(i));
23 for(int i=0; i<size(); i++) {
25 Object arg = getArg(i);
27 Object o = addOp(op, arg);
32 } catch(RuntimeException e) {
33 System.err.println("Had a problem at PC: " + i + " of " + method);
35 throw new IOException("invalid class file");
40 private Object[] ops = new Object[65535];
41 private int[] ofs = new int[65535];
42 private int numOps = 0;
44 // Instance Data; used ONLY during constructor; then thrown away /////////////////////////////////////////////////
46 /** this models the JVM locals; it is only used for unwinding stack-ops into an SSA-tree, then thrown away */
47 private final Expr[] local;
49 /** this models the JVM stack; it is only used for unwinding stack-ops into an SSA-tree, then thrown away */
50 private final Expr[] stack;
52 /** JVM stack pointer */
55 private Expr push(Expr e) {
56 if(sp == stack.length) {
57 for(int i=0;i<stack.length;i++) System.err.println("Stack " + i + ": " + stack[i]);
58 throw new IllegalStateException("stack overflow (" + stack.length + ")");
60 if(e.getType() == Type.VOID) throw new IllegalArgumentException("can't push a void");
61 return stack[sp++] = e;
64 if(sp == 0) throw new IllegalStateException("stack underflow");
68 private Op seqPush(Expr e) {
74 // SSA-node classes /////////////////////////////////////////////////////////////////////////////////////////
76 public final Expr VOID_EXPR = new Expr() {
77 public Type getType() { return Type.VOID; }
80 /** an purely imperative operation which does not generate data */
81 public abstract class Op {
82 //public abstract Op[] predecessors(); // not implemented yet
83 //public abstract Op[] successors(); // not implemented yet
84 public String toString() { return name(); }
86 String name = this.getClass().getName();
87 if (name.indexOf('$') != -1) name = name.substring(name.lastIndexOf('$')+1);
88 if (name.indexOf('.') != -1) name = name.substring(name.lastIndexOf('.')+1);
93 /** A sequence point. expr is evaluated for side effects at this point, this does not generate data
94 Expressions that haven't been evaluated with Seq are evaluated when they are first encountered
96 public class Seq extends Op {
97 private final Expr expr;
98 public String toString() { return expr.toString(); }
99 public Seq(Expr expr) { this.expr = expr; }
102 /** an operation which generates data */
103 public abstract class Expr extends Op {
104 //public abstract Expr[] contributors(); // not implemented yet
105 //public abstract Expr[] dependents(); // not implemented yet
107 /** every JSSA.Expr either remembers its type _OR_ knows how to figure it out (the latter is preferred to eliminate
108 * redundant information that could possibly "disagree" with itself -- this happened a LOT in Soot) */
109 public abstract Type getType();
111 public final String toString() { return exprToString(this); }
112 public String _toString() { return super.toString(); } // Adam is going to hate me for this
116 * A "nondeterministic merge" -- for example when the first instruction in a loop reads from a local which could have been
117 * written to either by some instruction at the end of the previous iteration of the loop or by some instruction before
118 * the loop (on the first iteration).
120 public class Phi extends Expr {
121 private final Expr[] inputs;
122 public Phi(Expr[] inputs) {
123 this.inputs = new Expr[inputs.length];
124 System.arraycopy(inputs, 0, this.inputs, 0, inputs.length);
126 public Type getType() {
128 Type t = inputs[0].getType();
130 // FIXME: actually this should check type-unifiability... fe, the "type of null" unifies with any Type.Ref
131 for(int i=1; i<inputs.length; i++)
132 if (inputs[i].getType() != t)
133 throw new Error("Phi node with disagreeing types! Crisis!");
138 public class Argument extends Expr {
139 public final String name;
141 public Argument(String name, Type t) { this.name = name; this.t = t; }
142 public String _toString() { return name; }
143 public Type getType() { return t; }
147 public class Not extends Expr {
150 if(e.getType() != Type.BOOLEAN) throw new IllegalArgumentException("not needs a boolean expression");
153 public Type getType() { return Type.BOOLEAN; }
154 public String _toString() { return "!(" + e + ")"; }
157 public class Neg extends Expr {
160 if(!e.getType().isPrimitive()) throw new IllegalArgumentException("can only negate a primitive");
163 public Type getType() { return e.getType(); }
164 public String _toString() { return "- (" + e + ")"; }
167 // Binary Operations //////////////////////////////////////////////////////////////////////////////
169 public abstract class BinExpr extends Expr {
170 public final Expr e1;
171 public final Expr e2;
172 private final String show;
173 public BinExpr(Expr e1, Expr e2, String show) { this.e1 = e1; this.e2 = e2; this.show = show; }
174 public String _toString() {
175 // FEATURE: should we be doing some precedence stuff here? probably no worth it for debugging output
176 return "(" + e1 + show + e2 + ")";
180 public class Comparison extends BinExpr {
181 public Comparison(Expr e1, Expr e2, String show) { super(e1, e2, show); }
182 public Type getType() { return Type.BOOLEAN; }
185 public class Eq extends Comparison {
186 public Eq(Expr e1, Expr e2) {
188 if(e1.getType().isPrimitive() != e2.getType().isPrimitive())
189 throw new IllegalArgumentException("type mismatch");
190 if(e1.getType().isPrimitive() && e1.getType() != e2.getType())
191 throw new IllegalArgumentException("type mismatch");
192 // FEATURE: Check if we can compare these classes
197 public class PrimitiveComparison extends Comparison {
198 public PrimitiveComparison(Expr e1, Expr e2, String show) {
200 if(!e1.getType().isPrimitive() || e1.getType() != e2.getType()) throw new IllegalArgumentException("type mismatch");
204 public class Gt extends PrimitiveComparison { public Gt(Expr e1, Expr e2) { super(e1, e2, ">"); } }
205 public class Lt extends PrimitiveComparison { public Lt(Expr e1, Expr e2) { super(e1, e2, "<"); } }
206 public class Ge extends PrimitiveComparison { public Ge(Expr e1, Expr e2) { super(e1, e2, ">="); } }
207 public class Le extends PrimitiveComparison { public Le(Expr e1, Expr e2) { super(e1, e2, "<="); } }
209 // Math Operations //////////////////////////////////////////////////////////////////////////////
211 public class BinMath extends BinExpr {
212 public BinMath(Expr e1, Expr e2, String show) {
214 if(e1.getType() != e2.getType()) throw new IllegalArgumentException("types disagree");
216 public Type getType() { return e1.getType(); }
219 public class Add extends BinMath { public Add(Expr e, Expr e2) { super(e, e2, "+"); } }
220 public class Sub extends BinMath { public Sub(Expr e, Expr e2) { super(e, e2, "-"); } }
221 public class Mul extends BinMath { public Mul(Expr e, Expr e2) { super(e, e2, "*"); } }
222 public class Rem extends BinMath { public Rem(Expr e, Expr e2) { super(e, e2, "%"); } }
223 public class Div extends BinMath { public Div(Expr e, Expr e2) { super(e, e2, "/"); } }
224 public class And extends BinMath { public And(Expr e, Expr e2) { super(e, e2, "&"); } }
225 public class Or extends BinMath { public Or(Expr e, Expr e2) { super(e, e2, "|"); } }
226 public class Xor extends BinMath { public Xor(Expr e, Expr e2) { super(e, e2, "^"); } }
228 public class BitShiftExpr extends BinExpr {
229 public BitShiftExpr(Expr e1, Expr e2, String show) {
231 Type t = e1.getType();
232 if(t != Type.INT && t != Type.LONG) throw new IllegalArgumentException("type mismatch");
233 if(e2.getType() != Type.INT) throw new IllegalArgumentException("type mismatch");
235 public Type getType() { return e1.getType(); }
237 public class Shl extends BitShiftExpr { public Shl(Expr e, Expr e2) { super(e, e2, "<<"); } }
238 public class Shr extends BitShiftExpr { public Shr(Expr e, Expr e2) { super(e, e2, ">>"); } }
239 public class Ushr extends BitShiftExpr { public Ushr(Expr e, Expr e2) { super(e, e2, ">>>"); } }
241 // Other operations //////////////////////////////////////////////////////////////////////////////
243 public class Cast extends Expr {
246 public Cast(Expr e, Type t) {
247 if(e.getType().isRef() != t.isRef()) throw new IllegalArgumentException("invalid cast");
248 // FEATURE: Check that one is a subclass of the other if it is a ref
252 public Type getType() { return t; }
255 public class InstanceOf extends Expr {
258 public InstanceOf(Expr e, Type.Ref t) {
259 if(!e.getType().isRef()) throw new IllegalArgumentException("can't do an instanceof check on a non-ref");
263 public Type getType() { return Type.BOOLEAN; }
266 public class Throw extends Op {
268 public Throw(Expr e) {
269 if(!e.getType().isRef()) throw new IllegalArgumentException("can't throw a non ref");
270 // FEATURE: CHeck that it is a subclass of Throwable
275 public class Branch extends Op {
276 public Branch(Expr condition, Object destination) { }
277 public Branch(Label destination) { }
278 public Branch(MethodGen.Switch s) { }
281 public class Goto extends Branch { }
282 public class RET extends Branch { }
283 public class JSR extends Branch { public JSR(Label l) { super(l); } }
284 public class If extends Branch { }
286 /** represents a "returnaddr" pushed onto the stack */
287 public class Label extends Expr {
289 public Type getType() { throw new Error("attempted to call getType() on a Label"); }
290 public Label(Op op) { this.op = op; }
291 public Label(int i) { this.op = null; /* FIXME */ }
294 public class New extends Expr {
295 public final Type.Class t;
296 public Type getType() { return t; }
297 public New(Type.Class t) { this.t = t; }
298 public String _toString() { return "new " + t + "()"; }
301 public class NewArray extends Expr {
302 public final Type.Array t;
303 public final Expr[] dims;
304 public NewArray(Type.Array t, Expr[] dims) { this.t = t; this.dims = dims; }
305 public NewArray(Type.Array t, Expr dim) { this(t,new Expr[]{dim}); }
306 public Type getType() { return t; }
309 public class Return extends Op {
311 public Return() { this(VOID_EXPR); }
312 public Return(Expr e) { this.e = e; }
313 public String toString() { return e.getType() == Type.VOID ? "return" : ("return "+e.toString()); }
316 /** GETFIELD and GETSTATIC */
317 public class Get extends Expr {
318 final Type.Class.Field f;
320 public Type getType() { return f.getType(); }
321 public Get(Type.Class.Field f) { this(f, null); }
322 public Get(Type.Class.Field f, Expr e) { this.f = f; this.e = e; }
323 public String _toString() {
327 : f.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
333 /** PUTFIELD and PUTSTATIC */
334 public class Put extends Op {
335 final Type.Class.Field f;
338 public Put(Type.Class.Field f, Expr v) { this(f, v, null); }
339 public Put(Type.Class.Field f, Expr v, Expr e) { this.f = f; this.v = v; this.e = e; }
340 public String toString() {
344 : f.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
346 : f.toString()) + " = " + v;
350 public class ArrayPut extends Op {
352 public ArrayPut(Expr e, Expr i, Expr v) { this.e = e; this.i = i; this.v = v; }
355 public class ArrayGet extends Expr {
357 public ArrayGet(Expr e, Expr i) { this.e = e; this.i = i; }
358 public Type getType() { return e.getType().asArray().getElementType(); }
361 public class ArrayLength extends Expr {
363 public ArrayLength(Expr e) { this.e = e; }
364 public Type getType() { return Type.INT; }
367 public abstract class Invoke extends Expr {
368 public final Expr[] arguments;
369 public final Type.Class.Method method;
370 protected Invoke(Type.Class.Method m, Expr[] a) { this.arguments = a; this.method = m; }
372 public Type getType() { return method.getReturnType(); }
373 protected void args(StringBuffer sb) {
375 for(int i=0; i<arguments.length; i++) {
376 if (i>0) sb.append(", ");
377 sb.append(arguments[i]+"");
382 public String _toString() {
383 StringBuffer sb = new StringBuffer();
384 sb.append(method.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
386 : (method.getDeclaringClass() + "." + method.name));
388 return sb.toString();
391 public class InvokeStatic extends Invoke { public InvokeStatic(Type.Class.Method m, Expr[] a) { super(m,a); } }
392 public class InvokeSpecial extends InvokeVirtual {
393 public InvokeSpecial(Type.Class.Method m, Expr[] a, Expr e) { super(m,a,e); }
394 public String _toString() { return _toString(method.name.equals("<init>") ? method.getDeclaringClass().getName() : method.name); }
396 public class InvokeInterface extends InvokeVirtual{public InvokeInterface(Type.Class.Method m, Expr[] a, Expr e){super(m,a,e);}}
397 public class InvokeVirtual extends Invoke {
398 public final Expr instance;
399 public InvokeVirtual(Type.Class.Method m, Expr[] a, Expr e) { super(m, a); instance = e; }
400 public String _toString() { return _toString(method.name); }
401 protected String _toString(String name) {
402 StringBuffer sb = new StringBuffer();
403 sb.append(instance+".");
406 return sb.toString();
410 public class Constant extends Expr {
411 private final Object o;
412 public Constant(int i) { this(new Integer(i)); }
413 public Constant(Object o) { this.o = o; }
414 public String _toString() { return o instanceof String ? "\"" + o + "\"" : o.toString(); }
415 public Type getType() {
416 if (o instanceof Byte) return Type.BYTE;
417 if (o instanceof Short) return Type.SHORT;
418 if (o instanceof Character) return Type.CHAR;
419 if (o instanceof Boolean) return Type.BOOLEAN;
420 if (o instanceof Long) return Type.LONG;
421 if (o instanceof Double) return Type.DOUBLE;
422 if (o instanceof Float) return Type.FLOAT;
423 if (o instanceof Integer) return Type.INT;
424 if (o instanceof String) return Type.STRING;
425 throw new IllegalStateException("unknown constant type");
430 // Implementation //////////////////////////////////////////////////////////////////////////////
432 private Object addOp(int op, Object arg) {
436 MethodGen.Wide w = (MethodGen.Wide)arg;
443 MethodGen.Pair p = (MethodGen.Pair)arg;
450 case NOP: return null;
452 // Stack manipulations //////////////////////////////////////////////////////////////////////////////
454 case ACONST_NULL: return stack[sp++] = new Constant(null);
455 case ICONST_M1: return stack[sp++] = new Constant(-1);
456 case ICONST_0: case LCONST_0: case FCONST_0: case DCONST_0: push(new Constant(0)); return null;
457 case ICONST_1: case LCONST_1: case FCONST_1: case DCONST_1: push(new Constant(1)); return null;
458 case ICONST_2: case FCONST_2: push(new Constant(2)); return null;
459 case ICONST_3: push(new Constant(3)); return null;
460 case ICONST_4: push(new Constant(4)); return null;
461 case ICONST_5: push(new Constant(5)); return null;
462 case ILOAD: case LLOAD: case FLOAD: case DLOAD: case ALOAD: push(local[i1]); return null;
463 case ILOAD_0: case LLOAD_0: case FLOAD_0: case DLOAD_0: case ALOAD_0: push(local[0]); return null;
464 case ILOAD_1: case LLOAD_1: case FLOAD_1: case DLOAD_1: case ALOAD_1: push(local[1]); return null;
465 case ALOAD_2: case DLOAD_2: case FLOAD_2: case LLOAD_2: case ILOAD_2: push(local[2]); return null;
466 case ILOAD_3: case LLOAD_3: case FLOAD_3: case DLOAD_3: case ALOAD_3: push(local[3]); return null;
467 case ISTORE: case LSTORE: case FSTORE: case DSTORE: case ASTORE: local[i1] = pop(); return null;
468 case ISTORE_0: case LSTORE_0: case FSTORE_0: case DSTORE_0: case ASTORE_0: local[0] = pop(); return null;
469 case ISTORE_1: case LSTORE_1: case FSTORE_1: case DSTORE_1: case ASTORE_1: local[1] = pop(); return null;
470 case ASTORE_2: case DSTORE_2: case FSTORE_2: case LSTORE_2: case ISTORE_2: local[2] = pop(); return null;
471 case ISTORE_3: case LSTORE_3: case FSTORE_3: case DSTORE_3: case ASTORE_3: local[3] = pop(); return null;
472 case POP: pop(); return null;
473 case POP2: pop(); pop(); return null;
474 case DUP: push(stack[sp-1]); return null;
475 case DUP2: push(stack[sp-2]); push(stack[sp-2]); return null;
477 // Conversions //////////////////////////////////////////////////////////////////////////////
479 // coercions are added as-needed when converting from JSSA back to bytecode, so we can
480 // simply discard them here (assuming the bytecode we're reading in was valid in the first place)
482 case I2L: case F2L: case D2L: push(new Cast(pop(), Type.LONG)); return null;
483 case I2F: case L2F: case D2F: push(new Cast(pop(), Type.FLOAT)); return null;
484 case I2D: case L2D: case F2D: push(new Cast(pop(), Type.DOUBLE)); return null;
485 case L2I: case F2I: case D2I: push(new Cast(pop(), Type.INT)); return null;
486 case I2B: push(new Cast(pop(), Type.BYTE)); return null;
487 case I2C: push(new Cast(pop(), Type.CHAR)); return null;
488 case I2S: push(new Cast(pop(), Type.SHORT)); return null;
489 case SWAP: { Expr e1 = pop(), e2 = pop(); push(e2); push(e1); return null; }
491 // Math //////////////////////////////////////////////////////////////////////////////
493 case IADD: case LADD: case FADD: case DADD: push(new Add(pop(), pop())); return null;
494 case ISUB: case LSUB: case FSUB: case DSUB: push(new Sub(pop(), pop())); return null;
495 case IMUL: case LMUL: case FMUL: case DMUL: push(new Mul(pop(), pop())); return null;
496 case IREM: case LREM: case FREM: case DREM: push(new Rem(pop(), pop())); return null;
497 //case INEG: case LNEG: case FNEG: case DNEG: push(new Neg(pop())); return null;
498 case IDIV: case LDIV: case FDIV: case DDIV: push(new Div(pop(), pop())); return null;
499 case ISHL: case LSHL: push(new Shl(pop(), pop())); return null;
500 case ISHR: case LSHR: push(new Shr(pop(), pop())); return null;
501 case IUSHR: case LUSHR: push(new Ushr(pop(), pop())); return null;
502 case IAND: case LAND: push(new And(pop(), pop())); return null;
503 case IOR: case LOR: push(new Or(pop(), pop())); return null;
504 case IXOR: case LXOR: push(new Xor(pop(), pop())); return null;
505 case IINC: return local[i1] = new Add(local[i1], new Constant(i2));
507 // Control and branching //////////////////////////////////////////////////////////////////////////////
509 case IFNULL: return new Branch(new Eq(pop(), new Constant(null)), new Label(i1));
510 case IFNONNULL: return new Branch(new Not(new Eq(pop(),new Constant(null))),new Label(i1));
511 case IFEQ: return new Branch( new Eq(new Constant(0), pop()), arg);
512 case IFNE: return new Branch(new Not(new Eq(new Constant(0), pop())), arg);
513 case IFLT: return new Branch( new Lt(new Constant(0), pop()), arg);
514 case IFGE: return new Branch(new Not(new Lt(new Constant(0), pop())), arg);
515 case IFGT: return new Branch( new Gt(new Constant(0), pop()), arg);
516 case IFLE: return new Branch(new Not(new Gt(new Constant(0), pop())), arg);
517 case IF_ICMPEQ: return new Branch( new Eq(pop(), pop()), arg);
518 case IF_ICMPNE: return new Branch(new Not(new Eq(pop(), pop())), arg);
519 case IF_ICMPLT: return new Branch( new Lt(pop(), pop()), arg);
520 case IF_ICMPGE: return new Branch(new Not(new Lt(pop(), pop())), arg);
521 case IF_ICMPGT: return new Branch( new Gt(pop(), pop()), arg);
522 case IF_ICMPLE: return new Branch(new Not(new Gt(pop(), pop())), arg);
523 case IF_ACMPEQ: return new Branch( new Eq(pop(), pop()), arg);
524 case IF_ACMPNE: return new Branch(new Not(new Eq(pop(), pop())), arg);
525 case ATHROW: return new Throw(pop());
526 case GOTO: return new Branch(new Label(i1));
527 case JSR: return new JSR(new Label(i1));
528 case RET: return new RET();
529 case RETURN: return new Return();
530 case IRETURN: case LRETURN: case FRETURN: case DRETURN: case ARETURN:
531 return new Return(pop());
533 // Array manipulations //////////////////////////////////////////////////////////////////////////////
535 case IALOAD: case LALOAD: case FALOAD: case DALOAD: case AALOAD:
536 case BALOAD: case CALOAD: case SALOAD:
537 return seqPush(new ArrayGet(pop(), pop()));
538 case IASTORE: case LASTORE: case FASTORE: case DASTORE: case AASTORE:
539 case BASTORE: case CASTORE: case SASTORE:
540 return new ArrayPut(pop(), pop(), pop());
542 // Invocation //////////////////////////////////////////////////////////////////////////////
544 case INVOKEVIRTUAL: case INVOKESPECIAL: case INVOKESTATIC: case INVOKEINTERFACE: {
545 Type.Class.Method method = (Type.Class.Method)arg;
546 Expr args[] = new Expr[method.getNumArgs()];
547 for(int i=0; i<args.length; i++) args[args.length-i-1] = pop();
550 case INVOKEVIRTUAL: ret = new InvokeVirtual(method, args, pop()); break;
551 case INVOKEINTERFACE: ret = new InvokeInterface(method, args, pop()); break;
552 case INVOKESPECIAL: ret = new InvokeSpecial(method, args, pop()); break;
553 case INVOKESTATIC: ret = new InvokeStatic(method, args); break;
554 default: throw new Error("should never happen");
556 if(ret.getType() != Type.VOID) push(ret);
560 // Field Access //////////////////////////////////////////////////////////////////////////////
562 case GETSTATIC: return seqPush(new Get((Type.Class.Field)arg, null));
563 case PUTSTATIC: return new Put((Type.Class.Field)arg, pop(), null);
564 case GETFIELD: return seqPush(new Get((Type.Class.Field)arg, pop()));
565 case PUTFIELD: return new Put((Type.Class.Field)arg, pop(), pop());
567 // Allocation //////////////////////////////////////////////////////////////////////////////
569 case NEW: push(new New((Type.Class)arg)); return null;
572 switch(((Integer)arg).intValue()) {
573 case 4: base = Type.BOOLEAN; break;
574 case 5: base = Type.CHAR; break;
575 case 6: base = Type.FLOAT; break;
576 case 7: base = Type.DOUBLE; break;
577 case 8: base = Type.BYTE; break;
578 case 9: base = Type.SHORT; break;
579 case 10: base = Type.INT; break;
580 case 11: base = Type.LONG; break;
581 default: throw new IllegalStateException("invalid array type");
583 return seqPush(new NewArray(base.makeArray(),pop()));
585 case ANEWARRAY: push(new NewArray(((Type.Ref)arg).makeArray(), pop())); return null;
586 case MULTIANEWARRAY: {
587 MethodGen.MultiANewArray mana = (MethodGen.MultiANewArray) arg;
588 Expr[] dims = new Expr[mana.dims];
589 for(int i=0;i<dims.length;i++) dims[i] = pop();
590 return seqPush(new NewArray(mana.type, dims));
592 case ARRAYLENGTH: return seqPush(new ArrayLength(pop()));
594 // Runtime Type information //////////////////////////////////////////////////////////////////////////////
596 case CHECKCAST: return seqPush(new Cast(pop(), (Type.Ref)arg));
597 case INSTANCEOF: push(new InstanceOf(pop(), (Type.Ref)arg)); return null;
599 case LDC: case LDC_W: case LDC2_W: push(new Constant(arg)); return null;
601 case BIPUSH: push(new Constant((Integer)arg)); return null;
602 case SIPUSH: push(new Constant((Integer)arg)); return null;
604 case TABLESWITCH: return new Branch((MethodGen.Switch)arg);
605 case LOOKUPSWITCH: return new Branch((MethodGen.Switch)arg);
608 case MONITORENTER: Op.monitorEnter(pop());
609 case MONITOREXIT: Op.monitorExit(pop());
612 case DUP_X1: throw new Error("unimplemented");
613 case DUP_X2: throw new Error("unimplemented");
614 case DUP2_X1: throw new Error("unimplemented");
615 case DUP2_X2: throw new Error("unimplemented");
616 case LCMP: throw new Error("unimplemented");
617 case FCMPL: throw new Error("unimplemented");
618 case FCMPG: throw new Error("unimplemented");
619 case DCMPL: throw new Error("unimplemented");
620 case DCMPG: throw new Error("unimplemented");
621 case GOTO_W: throw new Error("unimplemented");
622 case JSR_W: throw new Error("unimplemented");
623 default: throw new Error("unhandled");
628 public void debugBodyToString(StringBuffer sb) {
629 StringBuffer sb0 = new StringBuffer();
630 super.debugBodyToString(sb0);
631 StringTokenizer st = new StringTokenizer(sb0.toString(), "\n");
632 String[] lines = new String[st.countTokens()];
633 for(int i=0; i<lines.length; i++) lines[i] = st.nextToken();
634 for(int j=0; j<ofs[0]; j++) {
635 String s = " /* " + lines[j].trim();
636 while(s.length() < 50) s += " ";
642 bindingMap = new IdentityHashMap();
645 for(int i=0; i<numOps; i++) {
646 String s = " /* " + lines[ofs[i]].trim();
647 while(s.length() < 50) s += " ";
649 s += ops[i].toString();
652 for(int j=ofs[i]+1; j<(i==numOps-1?size():ofs[i+1]); j++) {
653 s = " /* " + lines[j].trim();
654 while(s.length() < 50) s += " ";
662 private Map bindingMap;
664 String exprToString(Expr e) {
665 if(e instanceof Constant) return e._toString();
666 String s = (String)bindingMap.get(e);
667 if(s != null) return s;
669 if(e.getType() == Type.VOID) return e._toString();
670 else if(e.getType() == Type.DOUBLE || e.getType() == Type.FLOAT) prefix = "f";
671 else if(e.getType().isPrimitive()) prefix = "i";
672 else if(e.getType().isArray()) prefix = "a";
674 s = prefix + (nextVar++);
676 return "(" + s + ":= " + e._toString() + ")";
679 public static void main(String[] args) throws Exception {
680 InputStream is = Class.forName(args[0]).getClassLoader().getResourceAsStream(args[0].replace('.', '/')+".class");
681 System.out.println(new ClassFile(new DataInputStream(is), true).toString());