+package org.ibex.classgen;
+import java.io.*;
+import java.util.*;
+
+/**
+ * a highly streamlined SSA-form intermediate representation of a
+ * sequence of JVM instructions; all stack manipulation is factored
+ * out.
+ */
+public class JSSA extends MethodGen implements CGConst {
+
+ // Constructor //////////////////////////////////////////////////////////////////////////////
+
+ public JSSA(Type.Class c, DataInput in, ConstantPool cp) throws IOException {
+ super(c, in, cp);
+ for(int i=0; i<this.method.getNumArgs(); i++)
+ local[i] = new Argument("arg"+i, this.method.getArgType(i));
+ for(int i=0; i<size(); i++) {
+ int op = get(i);
+ Object arg = getArg(i);
+ Object o = addOp(op, arg);
+ if (o != null) {
+ ops[numOps] = o;
+ ofs[numOps++] = i;
+ }
+ }
+ }
+
+ public void debugBodyToString(StringBuffer sb) {
+ StringBuffer sb0 = new StringBuffer();
+ super.debugBodyToString(sb0);
+ StringTokenizer st = new StringTokenizer(sb0.toString(), "\n");
+ String[] lines = new String[st.countTokens()];
+ for(int i=0; i<lines.length; i++) lines[i] = st.nextToken();
+ for(int j=0; j<ofs[0]; j++) {
+ String s = " /* " + lines[j].trim();
+ while(s.length() < 50) s += " ";
+ s += " */";
+ sb.append(s);
+ sb.append("\n");
+ }
+ for(int i=0; i<numOps; i++) {
+ String s = " /* " + lines[ofs[i]].trim();
+ while(s.length() < 50) s += " ";
+ s += " */ ";
+ s += ops[i].toString();
+ sb.append(s);
+ sb.append(";\n");
+ for(int j=ofs[i]+1; j<(i==numOps-1?size():ofs[i+1]); j++) {
+ s = " /* " + lines[j].trim();
+ while(s.length() < 50) s += " ";
+ s += " */";
+ sb.append(s);
+ sb.append("\n");
+ }
+ }
+ }
+
+ private Object[] ops = new Object[65535];
+ private int[] ofs = new int[65535];
+ private int numOps = 0;
+
+ // Instance Data; used ONLY during constructor; then thrown away /////////////////////////////////////////////////
+
+ /** this models the JVM locals; it is only used for unwinding stack-ops into an SSA-tree, then thrown away */
+ private Expr[] local = new Expr[6];
+
+ /** this models the JVM stack; it is only used for unwinding stack-ops into an SSA-tree, then thrown away */
+ private Expr[] stack = new Expr[65535];
+
+ /** JVM stack pointer */
+ private int sp = 0;
+
+ private Expr push(Expr e) { return stack[sp++] = e; }
+ private Expr pop() { return stack[--sp]; }
+
+
+ // SSA-node classes /////////////////////////////////////////////////////////////////////////////////////////
+
+ /** an purely imperative operation which does not generate data */
+ public abstract class Op {
+ //public abstract Op[] predecessors(); // not implemented yet
+ //public abstract Op[] successors(); // not implemented yet
+ public String toString() { return name(); }
+ String name() {
+ String name = this.getClass().getName();
+ if (name.indexOf('$') != -1) name = name.substring(name.lastIndexOf('$')+1);
+ if (name.indexOf('.') != -1) name = name.substring(name.lastIndexOf('.')+1);
+ return name;
+ }
+ }
+
+ /** an operation which generates data */
+ public abstract class Expr extends Op {
+ //public abstract Expr[] contributors(); // not implemented yet
+ //public abstract Expr[] dependents(); // not implemented yet
+
+ /** every JSSA.Expr either remembers its type _OR_ knows how to figure it out (the latter is preferred to eliminate
+ * redundant information that could possibly "disagree" with itself -- this happened a LOT in Soot) */
+ public abstract Type getType();
+ }
+
+ /**
+ * A "nondeterministic merge" -- for example when the first instruction in a loop reads from a local which could have been
+ * written to either by some instruction at the end of the previous iteration of the loop or by some instruction before
+ * the loop (on the first iteration).
+ */
+ public class Phi extends Expr {
+ private final Expr[] inputs;
+ public Phi(Expr[] inputs) {
+ this.inputs = new Expr[inputs.length];
+ System.arraycopy(inputs, 0, this.inputs, 0, inputs.length);
+ }
+ public Type getType() {
+ // sanity check
+ Type t = inputs[0].getType();
+
+ // FIXME: actually this should check type-unifiability... fe, the "type of null" unifies with any Type.Ref
+ for(int i=1; i<inputs.length; i++)
+ if (inputs[i].getType() != t)
+ throw new Error("Phi node with disagreeing types! Crisis!");
+ return t;
+ }
+ }
+
+ public class Argument extends Expr {
+ public final String name;
+ public final Type t;
+ public Argument(String name, Type t) { this.name = name; this.t = t; }
+ public String toString() { return name; }
+ public Type getType() { return t; }
+ }
+
+ // Binary Operations //////////////////////////////////////////////////////////////////////////////
+
+ public abstract class BinExpr extends Expr {
+ public final Expr e1;
+ public final Expr e2;
+ public BinExpr(Expr e1, Expr e2) { this.e1 = e1; this.e2 = e2; }
+ public String toString() {
+ return name() + "("+e1+", "+e2+")";
+ }
+ }
+
+ public class Comparison extends BinExpr {
+ public Comparison(Expr e1, Expr e2) { super(e1, e2); }
+ public Type getType() { return Type.BOOLEAN; }
+ }
+ public class Gt extends Comparison { public Gt(Expr e1, Expr e2) { super(e1, e2); } }
+ public class Lt extends Comparison { public Lt(Expr e1, Expr e2) { super(e1, e2); } }
+ public class Eq extends Comparison { public Eq(Expr e1, Expr e2) { super(e1, e2); } }
+ public class Not extends Expr {
+ public final Expr e;
+ public Not(Expr e) { this.e = e; }
+ public Type getType() { return Type.BOOLEAN; }
+ }
+
+ // Math Operations //////////////////////////////////////////////////////////////////////////////
+
+ public class Math extends BinExpr {
+ private final String show;
+ public Math(Expr e1, Expr e2, String show) { super(e2, e1); this.show = show; }
+ public String toString() { return e1+" "+show+" "+e2; }
+ public Type getType() {
+ Type t = e1.getType();
+ if (t != e2.getType()) throw new Error("types disagree");
+ return t;
+ }
+ }
+ public class Add extends Math { public Add(Expr e, Expr e2) { super(e, e2, "+"); } }
+ public class Sub extends Math { public Sub(Expr e, Expr e2) { super(e, e2, "-"); } }
+ public class Mul extends Math { public Mul(Expr e, Expr e2) { super(e, e2, "*"); } }
+ public class Rem extends Math { public Rem(Expr e, Expr e2) { super(e, e2, "%"); } }
+ //public class Neg extends Math { public Neg(Expr e) { super(e, "-"); } }
+ public class Div extends Math { public Div(Expr e, Expr e2) { super(e, e2, "/"); } }
+ public class Shl extends Math { public Shl(Expr e, Expr e2) { super(e, e2, "<<"); } }
+ public class Shr extends Math { public Shr(Expr e, Expr e2) { super(e, e2, ">>"); } }
+ public class Ushr extends Math { public Ushr(Expr e, Expr e2) { super(e, e2, ">>>"); } }
+ public class And extends Math { public And(Expr e, Expr e2) { super(e, e2, "&"); } }
+ public class Or extends Math { public Or(Expr e, Expr e2) { super(e, e2, "|"); } }
+ public class Xor extends Math { public Xor(Expr e, Expr e2) { super(e, e2, "^"); } }
+
+ // Other operations //////////////////////////////////////////////////////////////////////////////
+
+ public class Cast extends Expr {
+ final Expr e;
+ final Type t;
+ public Cast(Expr e, Type t) { this.e = e; this.t = t; }
+ public Type getType() { return t; }
+ }
+
+ public class InstanceOf extends Expr {
+ final Expr e;
+ final Type t;
+ public InstanceOf(Expr e, Type t) { this.e = e; this.t = t; }
+ public Type getType() { return Type.BOOLEAN; }
+ }
+
+ public class Throw extends Op {
+ public final Expr e;
+ public Throw(Expr e) { this.e = e; }
+ }
+
+ public class Branch extends Op {
+ public Branch(Expr condition, Object destination) { }
+ public Branch(Label destination) { }
+ public Branch(MethodGen.Switch s) { }
+ public Branch() { }
+ }
+ public class Goto extends Branch { }
+ public class RET extends Branch { }
+ public class JSR extends Branch { public JSR(Label l) { super(l); } }
+ public class If extends Branch { }
+
+ /** represents a "returnaddr" pushed onto the stack */
+ public class Label extends Expr {
+ public final Op op;
+ public Type getType() { throw new Error("attempted to call getType() on a Label"); }
+ public Label(Op op) { this.op = op; }
+ public Label(int i) { this.op = null; /* FIXME */ }
+ }
+
+ public class Allocate extends Expr {
+ public final Type t;
+ public Type getType() { return t; }
+ public Allocate(Type t) { this.t = t; }
+ public Allocate(Type.Array t, Expr e) { this.t = t; }
+ }
+
+ public class Return extends Op {
+ final Expr e;
+ public Return() { this(null); }
+ public Return(Expr e) { this.e = e; }
+ public String toString() { return e==null?"return":("return "+e.toString()); }
+ }
+
+ /** GETFIELD and GETSTATIC */
+ public class Get extends Expr {
+ final Type.Class.Field f;
+ final Expr e;
+ public Type getType() { return f.getType(); }
+ public Get(Type.Class.Field f) { this(f, null); }
+ public Get(Type.Class.Field f, Expr e) { this.f = f; this.e = e; }
+ public String toString() {
+ return
+ (e!=null
+ ? e+"."+f.name
+ : f.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
+ ? f.name
+ : f.toString());
+ }
+ }
+
+ /** PUTFIELD and PUTSTATIC */
+ public class Put extends Op {
+ final Type.Class.Field f;
+ final Expr v;
+ final Expr e;
+ public Put(Type.Class.Field f, Expr v) { this(f, v, null); }
+ public Put(Type.Class.Field f, Expr v, Expr e) { this.f = f; this.v = v; this.e = e; }
+ public String toString() {
+ return
+ (e!=null
+ ? e+"."+f.name
+ : f.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
+ ? f.name
+ : f.toString()) + " = " + v;
+ }
+ }
+
+ public class ArrayPut extends Op {
+ final Expr e, i, v;
+ public ArrayPut(Expr e, Expr i, Expr v) { this.e = e; this.i = i; this.v = v; }
+ }
+
+ public class ArrayGet extends Expr {
+ final Expr e, i;
+ public ArrayGet(Expr e, Expr i) { this.e = e; this.i = i; }
+ public Type getType() { return e.getType().asArray().getElementType(); }
+ }
+
+ public class ArrayLength extends Expr {
+ final Expr e;
+ public ArrayLength(Expr e) { this.e = e; }
+ public Type getType() { return Type.INT; }
+ }
+
+ public abstract class Invoke extends Expr {
+ public final Expr[] arguments;
+ public final Type.Class.Method method;
+ protected Invoke(Type.Class.Method m, Expr[] a) { this.arguments = a; this.method = m; }
+
+ public Type getType() { return method.getReturnType(); }
+ protected void args(StringBuffer sb) {
+ sb.append("(");
+ for(int i=0; i<arguments.length; i++) {
+ if (i>0) sb.append(", ");
+ sb.append(arguments[i]+"");
+ }
+ sb.append(")");
+ }
+
+ public String toString() {
+ StringBuffer sb = new StringBuffer();
+ sb.append(method.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
+ ? method.name
+ : (method.getDeclaringClass() + "." + method.name));
+ args(sb);
+ return sb.toString();
+ }
+ }
+ public class InvokeStatic extends Invoke { public InvokeStatic(Type.Class.Method m, Expr[] a) { super(m,a); } }
+ public class InvokeSpecial extends InvokeVirtual {
+ public InvokeSpecial(Type.Class.Method m, Expr[] a, Expr e) { super(m,a,e); }
+ public String toString() {
+ StringBuffer sb = new StringBuffer();
+ sb.append(method.name.equals("<init>") ? "super" : method.name);
+ args(sb);
+ return sb.toString();
+ }
+ }
+ public class InvokeInterface extends InvokeVirtual{public InvokeInterface(Type.Class.Method m, Expr[] a, Expr e){super(m,a,e);}}
+ public class InvokeVirtual extends Invoke {
+ public final Expr instance;
+ public InvokeVirtual(Type.Class.Method m, Expr[] a, Expr e) { super(m, a); instance = e; }
+ public String toString() {
+ StringBuffer sb = new StringBuffer();
+ sb.append(method.name);
+ args(sb);
+ return sb.toString();
+ }
+ }
+
+ public class Constant extends Expr {
+ private final Object o;
+ public Constant(Object o) { this.o = o; }
+ public String toString() { return o.toString(); }
+ public Type getType() {
+ if (o instanceof Byte) return Type.BYTE;
+ if (o instanceof Short) return Type.SHORT;
+ if (o instanceof Character) return Type.CHAR;
+ if (o instanceof Boolean) return Type.BOOLEAN;
+ if (o instanceof Long) return Type.LONG;
+ if (o instanceof Double) return Type.DOUBLE;
+ if (o instanceof Float) return Type.FLOAT;
+ if (o instanceof ConstantPool.Ent) throw new Error("unimplemented");
+ throw new Error("this should not happen");
+ }
+ }
+
+
+ // Implementation //////////////////////////////////////////////////////////////////////////////
+
+ private Object addOp(int op, Object arg) {
+ Number number = null;
+ int i1 = 0;
+ int i2 = 0;
+ if (op==WIDE) {
+ MethodGen.Wide w = (MethodGen.Wide)arg;
+ op = w.op;
+ arg = null;
+ i1 = w.varNum;
+ i2 = w.n;
+ }
+ if (op==IINC) {
+ MethodGen.Pair p = (MethodGen.Pair)arg;
+ arg = null;
+ i1 = p.i1;
+ i2 = p.i2;
+ }
+ if (arg != null && arg instanceof Number) number = (Number)arg;
+ switch(op) {
+
+ case NOP: return null;
+
+ // Stack manipulations //////////////////////////////////////////////////////////////////////////////
+
+ case ACONST_NULL: return stack[sp++] = new Constant(null);
+ case ICONST_M1: return stack[sp++] = new Constant(-1);
+ case ICONST_0: case LCONST_0: case FCONST_0: case DCONST_0: push(new Constant(0)); return null;
+ case ICONST_1: case LCONST_1: case FCONST_1: case DCONST_1: push(new Constant(1)); return null;
+ case ICONST_2: case FCONST_2: push(new Constant(2)); return null;
+ case ICONST_3: push(new Constant(3)); return null;
+ case ICONST_4: push(new Constant(4)); return null;
+ case ICONST_5: push(new Constant(5)); return null;
+ case ILOAD: case LLOAD: case FLOAD: case DLOAD: case ALOAD: return push(local[i1]);
+ case ILOAD_0: case LLOAD_0: case FLOAD_0: case DLOAD_0: case ALOAD_0: return push(local[0]);
+ case ILOAD_1: case LLOAD_1: case FLOAD_1: case DLOAD_1: case ALOAD_1: return push(local[1]);
+ case ALOAD_2: case DLOAD_2: case FLOAD_2: case LLOAD_2: case ILOAD_2: return push(local[2]);
+ case ILOAD_3: case LLOAD_3: case FLOAD_3: case DLOAD_3: case ALOAD_3: return push(local[3]);
+ case ISTORE: case LSTORE: case FSTORE: case DSTORE: case ASTORE: local[i1] = pop(); return null;
+ case ISTORE_0: case LSTORE_0: case FSTORE_0: case DSTORE_0: case ASTORE_0: local[0] = pop(); return null;
+ case ISTORE_1: case LSTORE_1: case FSTORE_1: case DSTORE_1: case ASTORE_1: local[1] = pop(); return null;
+ case ASTORE_2: case DSTORE_2: case FSTORE_2: case LSTORE_2: case ISTORE_2: local[2] = pop(); return null;
+ case ISTORE_3: case LSTORE_3: case FSTORE_3: case DSTORE_3: case ASTORE_3: local[3] = pop(); return null;
+ case POP: stack[--sp] = null;
+ case POP2: stack[--sp] = null; stack[--sp] = null; /** fixme: pops a WORD, not an item */
+ case DUP: stack[sp] = stack[sp-1]; sp++;
+ case DUP2: stack[sp] = stack[sp-2]; stack[sp+1] = stack[sp-1]; sp+=2;
+
+ // Conversions //////////////////////////////////////////////////////////////////////////////
+
+ // coercions are added as-needed when converting from JSSA back to bytecode, so we can
+ // simply discard them here (assuming the bytecode we're reading in was valid in the first place)
+
+ case I2L: case F2L: case D2L: push(new Cast(pop(), Type.LONG)); return null;
+ case I2F: case L2F: case D2F: push(new Cast(pop(), Type.FLOAT)); return null;
+ case I2D: case L2D: case F2D: push(new Cast(pop(), Type.DOUBLE)); return null;
+ case L2I: case F2I: case D2I: push(new Cast(pop(), Type.INT)); return null;
+ case I2B: push(new Cast(pop(), Type.BYTE)); return null;
+ case I2C: push(new Cast(pop(), Type.CHAR)); return null;
+ case I2S: push(new Cast(pop(), Type.SHORT)); return null;
+ case SWAP: { Expr e1 = pop(), e2 = pop(); push(e2); push(e1); return null; }
+
+ // Math //////////////////////////////////////////////////////////////////////////////
+
+ case IADD: case LADD: case FADD: case DADD: push(new Add(pop(), pop())); return null;
+ case ISUB: case LSUB: case FSUB: case DSUB: push(new Sub(pop(), pop())); return null;
+ case IMUL: case LMUL: case FMUL: case DMUL: push(new Mul(pop(), pop())); return null;
+ case IREM: case LREM: case FREM: case DREM: push(new Rem(pop(), pop())); return null;
+ //case INEG: case LNEG: case FNEG: case DNEG: push(new Neg(pop())); return null;
+ case IDIV: case LDIV: case FDIV: case DDIV: push(new Div(pop(), pop())); return null;
+ case ISHL: case LSHL: push(new Shl(pop(), pop())); return null;
+ case ISHR: case LSHR: push(new Shr(pop(), pop())); return null;
+ case IUSHR: case LUSHR: push(new Ushr(pop(), pop())); return null;
+ case IAND: case LAND: push(new And(pop(), pop())); return null;
+ case IOR: case LOR: push(new Or(pop(), pop())); return null;
+ case IXOR: case LXOR: push(new Xor(pop(), pop())); return null;
+ case IINC: return local[i1] = new Add(local[i1], new Constant(i2));
+
+ // Control and branching //////////////////////////////////////////////////////////////////////////////
+
+ case IFNULL: return new Branch(new Eq(pop(), new Constant(null)), new Label(i1));
+ case IFNONNULL: return new Branch(new Not(new Eq(pop(),new Constant(null))),new Label(i1));
+ case IFEQ: return new Branch( new Eq(new Constant(0), pop()), arg);
+ case IFNE: return new Branch(new Not(new Eq(new Constant(0), pop())), arg);
+ case IFLT: return new Branch( new Lt(new Constant(0), pop()), arg);
+ case IFGE: return new Branch(new Not(new Lt(new Constant(0), pop())), arg);
+ case IFGT: return new Branch( new Gt(new Constant(0), pop()), arg);
+ case IFLE: return new Branch(new Not(new Gt(new Constant(0), pop())), arg);
+ case IF_ICMPEQ: return new Branch( new Eq(pop(), pop()), arg);
+ case IF_ICMPNE: return new Branch(new Not(new Eq(pop(), pop())), arg);
+ case IF_ICMPLT: return new Branch( new Lt(pop(), pop()), arg);
+ case IF_ICMPGE: return new Branch(new Not(new Lt(pop(), pop())), arg);
+ case IF_ICMPGT: return new Branch( new Gt(pop(), pop()), arg);
+ case IF_ICMPLE: return new Branch(new Not(new Gt(pop(), pop())), arg);
+ case IF_ACMPEQ: return new Branch( new Eq(pop(), pop()), arg);
+ case IF_ACMPNE: return new Branch(new Not(new Eq(pop(), pop())), arg);
+ case ATHROW: return new Throw(pop());
+ case GOTO: return new Branch(new Label(i1));
+ case JSR: return new JSR(new Label(i1));
+ case RET: return new RET();
+ case RETURN: return new Return();
+ case IRETURN: case LRETURN: case FRETURN: case DRETURN: case ARETURN:
+ return new Return(pop());
+
+ // Array manipulations //////////////////////////////////////////////////////////////////////////////
+
+ case IALOAD: case LALOAD: case FALOAD: case DALOAD: case AALOAD:
+ case BALOAD: case CALOAD: case SALOAD: push(new ArrayGet(pop(), pop())); return null;
+ case IASTORE: case LASTORE: case FASTORE: case DASTORE: case AASTORE:
+ case BASTORE: case CASTORE: case SASTORE: return new ArrayPut(pop(), pop(), pop());
+
+ // Invocation //////////////////////////////////////////////////////////////////////////////
+
+ case INVOKEVIRTUAL: case INVOKESPECIAL: case INVOKESTATIC: case INVOKEINTERFACE: {
+ Type.Class.Method method = (Type.Class.Method)arg;
+ Expr args[] = new Expr[method.getNumArgs()];
+ for(int i=0; i<args.length; i++) args[args.length-i-1] = pop();
+ switch(op) {
+ case INVOKEVIRTUAL: return push(new InvokeVirtual(method, args, pop()));
+ case INVOKEINTERFACE: return push(new InvokeInterface(method, args, pop()));
+ case INVOKESPECIAL: return push(new InvokeSpecial(method, args, pop()));
+ case INVOKESTATIC: return push(new InvokeStatic(method, args));
+ }
+ }
+
+ // Field Access //////////////////////////////////////////////////////////////////////////////
+
+ case GETSTATIC: push(new Get((Type.Class.Field)arg, null)); return null;
+ case PUTSTATIC: return new Put((Type.Class.Field)arg, pop(), null);
+ case GETFIELD: push(new Get((Type.Class.Field)arg, pop())); return null;
+ case PUTFIELD: return new Put((Type.Class.Field)arg, pop(), pop());
+
+ // Allocation //////////////////////////////////////////////////////////////////////////////
+
+ case NEW: push(new Allocate((Type)arg)); return null;
+ case NEWARRAY: push(new Allocate((Type.Array)arg, pop())); return null;
+ case ANEWARRAY: push(new Allocate(Type.OBJECT.makeArray(), pop())); return null;
+ case MULTIANEWARRAY: push(new Allocate(Type.OBJECT.makeArray(i2), null /* FIXME */)); return null;
+ case ARRAYLENGTH: push(new ArrayLength(pop())); return null;
+
+ // Runtime Type information //////////////////////////////////////////////////////////////////////////////
+
+ case CHECKCAST: push(new Cast(pop(), (Type)arg)); return null;
+ case INSTANCEOF: push(new InstanceOf(pop(), (Type)arg)); return null;
+
+ case LDC: case LDC_W: case LDC2_W: push(new Constant(arg)); return null;
+
+ case BIPUSH: push(new Constant(i1)); // FIXME return null;
+ case SIPUSH: push(new Constant(i1)); // FIXME return null;
+
+ case TABLESWITCH: new Branch((MethodGen.Switch)arg);
+ case LOOKUPSWITCH: new Branch((MethodGen.Switch)arg);
+
+ /*
+ case MONITORENTER: Op.monitorEnter(pop());
+ case MONITOREXIT: Op.monitorExit(pop());
+ */
+
+ case DUP_X1: throw new Error("unimplemented");
+ case DUP_X2: throw new Error("unimplemented");
+ case DUP2_X1: throw new Error("unimplemented");
+ case DUP2_X2: throw new Error("unimplemented");
+ case LCMP: throw new Error("unimplemented");
+ case FCMPL: throw new Error("unimplemented");
+ case FCMPG: throw new Error("unimplemented");
+ case DCMPL: throw new Error("unimplemented");
+ case DCMPG: throw new Error("unimplemented");
+ case GOTO_W: throw new Error("unimplemented");
+ case JSR_W: throw new Error("unimplemented");
+ default: throw new Error("unhandled");
+ }
+ }
+
+ public static void main(String[] args) throws Exception {
+ InputStream is = Class.forName(args[0]).getClassLoader().getResourceAsStream(args[0].replace('.', '/')+".class");
+ System.out.println(new ClassFile(new DataInputStream(is), true).debugToString());
+ }
+}