Example usage for org.objectweb.asm Opcodes RETURN

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes RETURN.

Prototype

int RETURN

To view the source code for org.objectweb.asm Opcodes RETURN.

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Usage

From source file:com.github.anba.es6draft.compiler.assembler.InstructionAssembler.java

License:Open Source License

public void voidreturn() {
    methodVisitor.visitInsn(Opcodes.RETURN);
    stack.voidreturn();
}

---

From source file:com.github.antag99.retinazer.weaver.ComponentProcessor.java

License:Open Source License

@Override
public FieldVisitor visitField(final int access, final String name, final String desc, final String signature,
        final Object value) {

    if ((access & ACC_STATIC) > 0)
        return super.visitField(access, name, desc, signature, value);

    final ComponentProperty property = metadata.propertiesByName.get(name);

    new MethodVisitor(ASM5,
            super.visitMethod(ACC_PUBLIC, property.getGetterName(), property.getGetterDesc(), null, null)) {
        {// w  w  w . java 2s  .  co m
            visitCode();
            visitVarInsn(ALOAD, 0);
            visitFieldInsn(GETFIELD, metadata.internalName, property.getBagName(), property.getBagDesc());
            visitVarInsn(ALOAD, 0);
            visitFieldInsn(GETFIELD, metadata.internalName, WeaverConstants.INDEX_FIELD_NAME,
                    WeaverConstants.INDEX_FIELD_DESC);
            Type erasedType = property.type.getSort() == Type.OBJECT ? Type.getObjectType("java/lang/Object")
                    : property.type;
            visitMethodInsn(INVOKEVIRTUAL, WeaverConstants.getBagName(property.type), "get",
                    "(I)" + erasedType.getDescriptor(), false);
            visitInsn(property.type.getOpcode(IRETURN));
            visitMaxs(-1, -1);
            visitEnd();
        }
    };

    new MethodVisitor(ASM5,
            super.visitMethod(ACC_PUBLIC, property.getSetterName(), property.getSetterDesc(), null, null)) {
        {
            visitCode();
            visitVarInsn(ALOAD, 0);
            visitFieldInsn(GETFIELD, metadata.internalName, property.getBagName(), property.getBagDesc());
            visitVarInsn(ALOAD, 0);
            visitFieldInsn(GETFIELD, metadata.internalName, WeaverConstants.INDEX_FIELD_NAME,
                    WeaverConstants.INDEX_FIELD_DESC);
            visitVarInsn(property.type.getOpcode(ILOAD), 1);
            Type erasedType = property.type.getSort() == Type.OBJECT ? Type.getObjectType("java/lang/Object")
                    : property.type;
            visitMethodInsn(INVOKEVIRTUAL, WeaverConstants.getBagName(property.type), "set",
                    "(I" + erasedType.getDescriptor() + ")V", false);
            visitInsn(Opcodes.RETURN);
            visitMaxs(-1, -1);
            visitEnd();
        }
    };

    FieldVisitor storeField = super.visitField(ACC_PUBLIC, property.getBagName(), property.getBagDesc(), null,
            null);
    if (storeField != null)
        storeField.visitEnd();

    return null; // Remove backing field
}

---

From source file:com.github.jasmo.obfuscate.InlineAccessors.java

License:Open Source License

private Query[] getPattern(boolean get, ClassNode owner, FieldNode field) {
    Type type = Type.getType(field.desc);
    List<Query> queries = new LinkedList<>();
    boolean local = local(field.access);
    if (local)//ww  w .j  av  a 2s .co  m
        queries.add(new Query("opcode", Opcodes.ALOAD, "var", 0));
    if (get) {
        int opcode = local ? Opcodes.GETFIELD : Opcodes.GETSTATIC;
        queries.add(new Query("opcode", opcode, "owner", owner.name, "name", field.name, "desc", field.desc));
        queries.add(new Query("opcode", type.getOpcode(Opcodes.IRETURN)));
    } else {
        int opcode = local ? Opcodes.PUTFIELD : Opcodes.PUTSTATIC;
        queries.add(new Query("opcode", type.getOpcode(Opcodes.ILOAD), "var", 0));
        queries.add(new Query("opcode", opcode, "owner", owner.name, "name", field.name, "desc", field.desc));
        queries.add(new Query("opcode", Opcodes.RETURN));
    }
    return queries.toArray(new Query[queries.size()]);
}

---

From source file:com.github.megatronking.stringfog.plugin.StringFogClassVisitor.java

License:Apache License

@Override
public void visitEnd() {
    if (!mIgnoreClass && !isClInitExists && !mStaticFinalFields.isEmpty()) {
        MethodVisitor mv = super.visitMethod(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
        mv.visitCode();/*  ww w.j a va  2 s . co m*/
        // Here init static final fields.
        for (ClassStringField field : mStaticFinalFields) {
            if (!canEncrypted(field.value)) {
                continue;
            }
            String originValue = field.value;
            String encryptValue = mStringFogImpl.encrypt(originValue, mKey);
            mMappingPrinter.output(getJavaClassName(), originValue, encryptValue);
            mv.visitLdcInsn(encryptValue);
            mv.visitMethodInsn(Opcodes.INVOKESTATIC, mFogClassName, "decrypt",
                    "(Ljava/lang/String;)Ljava/lang/String;", false);
            mv.visitFieldInsn(Opcodes.PUTSTATIC, mClassName, field.name, ClassStringField.STRING_DESC);
        }
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(1, 0);
        mv.visitEnd();
    }
    super.visitEnd();
}

---

From source file:com.github.rgcjonas.kuemmelgtr.core.Compiler.java

License:Open Source License

public static byte[] compileFunc(TokenSource<RPNToken> source, String variable) throws ParsingError {
    // initialize class
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES);

    writer.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "com/github/rgcjonas/kuemmelgtr/jit/BogusName", null,
            CompiledClassBase.class.getName().replace('.', '/'),
            new String[] { Evaluator.Function.class.getName().replace('.', '/') });

    // create constructor
    MethodVisitor construct = writer.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    construct.visitCode();/*from w  w  w  .  j av  a  2 s  . c o  m*/
    construct.visitVarInsn(Opcodes.ALOAD, 0);
    construct.visitMethodInsn(Opcodes.INVOKESPECIAL, CompiledClassBase.class.getName().replace('.', '/'),
            "<init>", "()V");
    construct.visitInsn(Opcodes.RETURN);
    construct.visitMaxs(0, 0);
    construct.visitEnd();

    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, "evaluate", "(D)D", null,
            new String[] { "com/github/rgcjonas/kuemmelgtr/core/RuntimeError" });

    compileCommon(source, method, variable);

    writer.visitEnd();
    return writer.toByteArray();
}

---

From source file:com.github.rgcjonas.kuemmelgtr.core.Compiler.java

License:Open Source License

public static byte[] compileBasic(TokenSource<RPNToken> source) throws ParsingError {
    // initialize class
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES);

    writer.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "com/github/rgcjonas/kuemmelgtr/jit/BogusName", null,
            CompiledClassBase.class.getName().replace('.', '/'),
            new String[] { Evaluator.Basic.class.getName().replace('.', '/') });

    // create constructor
    MethodVisitor construct = writer.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    construct.visitCode();//from  w w w. j  av  a 2  s .c o m
    construct.visitVarInsn(Opcodes.ALOAD, 0);
    construct.visitMethodInsn(Opcodes.INVOKESPECIAL, CompiledClassBase.class.getName().replace('.', '/'),
            "<init>", "()V");
    construct.visitInsn(Opcodes.RETURN);
    construct.visitMaxs(0, 0);
    construct.visitEnd();

    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, "evaluate", "()D", null,
            new String[] { "com/github/rgcjonas/kuemmelgtr/core/ParsingError",
                    "com/github/rgcjonas/kuemmelgtr/core/RuntimeError" });

    compileCommon(source, method, null);

    writer.visitEnd();
    return writer.toByteArray();
}

---

From source file:com.google.code.jconts.instrument.gen.AsyncMethodAdapter.java

License:Apache License

@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc) {
    checkProlog();/* w w w.  j a  va  2 s  .c o  m*/

    if (opcode == Opcodes.INVOKESTATIC && ASYNC_NAME.equals(owner) && ARETURN_NAME.equals(name)) {

        if (ARETURN_VOID_DESC.equals(desc)) {
            mv.visitInsn(Opcodes.ACONST_NULL);
        }

        // state variable
        target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
        mv.visitFieldInsn(Opcodes.GETFIELD, info.stateClassName, CONTINUATION_FIELD, CONTINUATION_DESC);
        mv.visitInsn(Opcodes.SWAP);
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, CONTINUATION_NAME, CONTINUATION_INVOKE_NAME,
                CONTINUATION_INVOKE_DESC);

        // Will be dropped while replacing ARETURN with RETURN.
        // FIXME: Should verify this value is NOT used.
        mv.visitInsn(Opcodes.ACONST_NULL);
        return;
    }
    if (opcode == Opcodes.INVOKESTATIC && ASYNC_NAME.equals(owner) && AWAIT_NAME.equals(name)
            && AWAIT_DESC.equals(desc)) {

        // Computation<T> is on stack

        // FIXME: ...
        // if (stack.size() != 1) {
        // throw new IllegalStateException(
        // "Stack preserving is not supported!");
        // }

        int index = dispatchTable.size();

        // Save state
        List<Type> l = new ArrayList<Type>(locals);
        if (!info.isStatic()) {
            l.remove(0);
        }

        // state.varX = locX
        String[] vars = info.tracker.stateFields(l.toArray(new Type[0]));
        for (int i = 0; i < vars.length; ++i) {
            // state variable
            target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
            mv.visitVarInsn(l.get(i).getOpcode(Opcodes.ILOAD), i + info.thisOffset);
            mv.visitFieldInsn(Opcodes.PUTFIELD, info.stateClassName, vars[i], l.get(i).getDescriptor());
        }

        // Create instance of continuation
        // new Continuation([this, ]state, index);
        mv.visitTypeInsn(Opcodes.NEW, info.continuationClassName);
        mv.visitInsn(Opcodes.DUP);

        // "this' for new Continuation([this, ]state, index)
        if (!info.isStatic()) {
            mv.visitVarInsn(Opcodes.ALOAD, 0);
        }

        // state and index
        target.visitVarInsn(Opcodes.ALOAD, 0 + info.thisOffset);
        mv.visitIntInsn(Opcodes.BIPUSH, index);

        String ctorDesc;
        if (info.isStatic()) {
            ctorDesc = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { info.stateType, Type.INT_TYPE });
        } else {
            ctorDesc = Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getObjectType(info.owner), info.stateType, Type.INT_TYPE });
        }
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, info.continuationClassName, CTOR_NAME, ctorDesc);

        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, COMPUTATION_NAME, COMPUTATION_EXECUTE_NAME,
                COMPUTATION_EXECUTE_DESC);
        super.visitInsn(Opcodes.RETURN);

        // Restore state
        // mv.visitFrame(Opcodes.F_SAME, 0, new Object[0], 0, new
        // Object[0]);
        Label label = new Label();

        int invokeIndex = dispatchTable.size();
        dispatchTable.add(label); // for invoke
        dispatchTable.add(label); // for setException
        mv.visitLabel(label);
        for (int i = 0; i < vars.length; ++i) {
            // state variable
            target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
            mv.visitFieldInsn(Opcodes.GETFIELD, info.stateClassName, vars[i], l.get(i).getDescriptor());
            mv.visitVarInsn(l.get(i).getOpcode(Opcodes.ISTORE), i + info.thisOffset);
        }

        // if (index == invokeIndex) goto invokeLabel;
        Label invokeLabel = new Label();
        target.visitVarInsn(Opcodes.ILOAD, 1 + info.thisOffset);
        mv.visitIntInsn(Opcodes.BIPUSH, invokeIndex);
        mv.visitJumpInsn(Opcodes.IF_ICMPEQ, invokeLabel);

        // Throw exception
        target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
        mv.visitFieldInsn(Opcodes.GETFIELD, info.stateClassName, "exception", THROWABLE_DESC);
        mv.visitInsn(Opcodes.ATHROW);

        // Push result value
        // invokeLabel:
        mv.visitLabel(invokeLabel);
        target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
        mv.visitFieldInsn(Opcodes.GETFIELD, info.stateClassName, "result", OBJECT_DESC);
        return;
    }
    super.visitMethodInsn(opcode, owner, name, desc);
}

---

From source file:com.google.code.jconts.instrument.gen.AsyncMethodAdapter.java

License:Apache License

@Override
public void visitInsn(int opcode) {
    checkProlog();/*from  w  w  w. j av a  2  s. c om*/

    if (opcode == Opcodes.ARETURN) {
        super.visitInsn(Opcodes.POP);
        super.visitInsn(Opcodes.RETURN);
    } else {
        super.visitInsn(opcode);
    }
}

---

From source file:com.google.code.jconts.instrument.gen.AsyncMethodAdapter.java

License:Apache License

@Override
public void visitMaxs(int maxStack, int maxLocals) {
    // Table switch at the end of the method
    mv.visitLabel(dispatchLabel);/*from   w  w  w  .  j  a v  a 2  s  .c  om*/

    Label dflt = new Label();

    // Load index
    target.visitVarInsn(Opcodes.ILOAD, 1 + info.thisOffset);
    int[] keys = new int[dispatchTable.size()];
    for (int i = 0; i < keys.length; ++i) {
        keys[i] = i;
    }
    mv.visitLookupSwitchInsn(dflt, keys, dispatchTable.toArray(new Label[0]));

    // FIXME: ...throw exception
    mv.visitLabel(dflt);
    mv.visitInsn(Opcodes.RETURN);

    // catch block
    mv.visitLabel(catchLabel);

    // invoke Continuation#setException(Throwable t)
    target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
    mv.visitFieldInsn(Opcodes.GETFIELD, info.stateClassName, CONTINUATION_FIELD, CONTINUATION_DESC);
    mv.visitInsn(Opcodes.SWAP);
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, CONTINUATION_NAME, CONTINUATION_SET_EXCEPTION_NAME,
            CONTINUATION_SET_EXCEPTION_DESC);
    mv.visitInsn(Opcodes.RETURN);

    // FIXME: evaluate properly
    super.visitMaxs(maxStack + 4 + info.thisOffset, maxLocals + 2);
}

---

From source file:com.google.code.jconts.instrument.gen.ComputationClassGenerator.java

License:Apache License

private void generateConstructor(ClassVisitor cv) {
    final String name = info.computationClassName;
    final Type outerType = Type.getObjectType(info.owner);

    // Constructor have form either <init>(OuterClass this$0, State state)
    // or <init>(State state)
    String ctorDesc;/*from ww  w .  j a  va2 s. c o m*/
    if (info.isStatic()) {
        ctorDesc = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { info.stateType });
    } else {
        cv.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_FINAL, "this$0", 'L' + info.owner + ';', null, null);

        ctorDesc = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { outerType, info.stateType });
    }

    // Generate constructor
    MethodVisitor mv = cv.visitMethod(0, CTOR_NAME, ctorDesc, null, null);
    mv.visitCode();
    Label start = new Label();
    Label end = new Label();
    mv.visitLabel(start);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, OBJECT_NAME, CTOR_NAME, DEFAULT_CTOR_DESC);

    // Save state field
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 1 + info.thisOffset);
    mv.visitFieldInsn(Opcodes.PUTFIELD, name, "state", stateDesc);

    // Save outer this
    if (!info.isStatic()) {
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, name, "this$0", outerType.getDescriptor());
    }
    mv.visitInsn(Opcodes.RETURN);
    mv.visitLabel(end);

    mv.visitLocalVariable("this", 'L' + name + ';', signature, start, end, 0);
    if (!info.isStatic()) {
        mv.visitLocalVariable("this$0", outerType.getDescriptor(), null, start, end, 1);
    }
    mv.visitLocalVariable("state", stateDesc, null, start, end, 1 + info.thisOffset);

    mv.visitMaxs(2, 2 + info.thisOffset);
    mv.visitEnd();
}

---

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