Example usage for org.objectweb.asm MethodVisitor visitLdcInsn

List of usage examples for org.objectweb.asm MethodVisitor visitLdcInsn

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitLdcInsn.

Prototype

public void visitLdcInsn(final Object value)

Source Link

Document

Visits a LDC instruction.

Usage

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void makeSetMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "set",
            "(Ljava/lang/String;Ljava/lang/Object;)L" + owner + ";", null, null);
    visitor.visitCode();//from w w w  .  ja va2s  .  c o m
    insertPrivateElementCheck(struct, visitor);
    Label nextCase = new Label();
    for (Member member : struct.getMembers()) {
        visitor.visitLdcInsn(member.getName());
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        visitor.visitJumpInsn(IFEQ, nextCase);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitVarInsn(ALOAD, 2);
        visitor.visitMethodInsn(INVOKEVIRTUAL, owner, member.getName(), "(Ljava/lang/Object;)L" + owner + ";",
                false);
        visitor.visitInsn(ARETURN);
        visitor.visitLabel(nextCase);
        nextCase = new Label();
    }
    insertUnknowElementCode(struct, visitor);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void makeGetMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "get", "(Ljava/lang/String;)Ljava/lang/Object;",
            null, null);/*from   w  w  w.jav a  2  s .  co  m*/
    visitor.visitCode();
    insertPrivateElementCheck(struct, visitor);
    Label nextCase = new Label();
    for (Member member : struct.getMembers()) {
        visitor.visitLdcInsn(member.getName());
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        visitor.visitJumpInsn(IFEQ, nextCase);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitMethodInsn(INVOKEVIRTUAL, owner, member.getName(), "()Ljava/lang/Object;", false);
        visitor.visitInsn(ARETURN);
        visitor.visitLabel(nextCase);
        nextCase = new Label();
    }
    insertUnknowElementCode(struct, visitor);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void throwLocalized(MethodVisitor visitor, String exceptionType, String message, String structName) {
    visitor.visitTypeInsn(NEW, exceptionType);
    visitor.visitInsn(DUP);/*  w  w  w  .j  av a 2  s . c o  m*/
    visitor.visitLdcInsn(message);
    visitor.visitInsn(ICONST_1);
    visitor.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    visitor.visitInsn(DUP);
    visitor.visitInsn(ICONST_0);
    visitor.visitLdcInsn(structName);
    visitor.visitInsn(AASTORE);
    visitor.visitMethodInsn(INVOKESTATIC, "gololang/Messages", "message",
            "(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;", false);
    visitor.visitMethodInsn(INVOKESPECIAL, exceptionType, "<init>", "(Ljava/lang/String;)V", false);
    visitor.visitInsn(ATHROW);
}

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void insertPrivateElementCheck(Struct struct, MethodVisitor visitor) {
    Label afterPrivateCheck = new Label();
    visitor.visitVarInsn(ALOAD, 1);//from   w  w w . ja  v a 2  s .com
    visitor.visitLdcInsn("_");
    visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "startsWith", "(Ljava/lang/String;)Z", false);
    visitor.visitJumpInsn(IFEQ, afterPrivateCheck);
    throwLocalized(visitor, "java/lang/IllegalArgumentException", "struct_private_member",
            struct.getPackageAndClass().toString());
    visitor.visitLabel(afterPrivateCheck);
}

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void makeToString(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    visitor.visitCode();/*w  w w. ja  v a 2  s . c  o  m*/
    visitor.visitTypeInsn(NEW, "java/lang/StringBuilder");
    visitor.visitInsn(DUP);
    visitor.visitLdcInsn("struct " + struct.getPackageAndClass().className() + "{");
    visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false);
    boolean first = true;
    for (Member member : struct.getPublicMembers()) {
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn((!first ? ", " : "") + member.getName() + "=");
        first = false;
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        visitor.visitInsn(DUP);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitFieldInsn(GETFIELD, owner, member.getName(), "Ljava/lang/Object;");
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/Object;)Ljava/lang/StringBuilder;", false);
    }
    visitor.visitLdcInsn("}");
    visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;",
            false);
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:org.eclipse.golo.compiler.JavaBytecodeStructGenerator.java

License:Open Source License

private void initMembersField(Struct struct, String owner, MethodVisitor visitor) {
    int arg;/* w  w  w  . java2s. co m*/
    visitor.visitVarInsn(ALOAD, 0);
    loadInteger(visitor, struct.getPublicMembers().size());
    visitor.visitTypeInsn(ANEWARRAY, "java/lang/String");
    arg = 0;
    for (Member member : struct.getPublicMembers()) {
        visitor.visitInsn(DUP);
        loadInteger(visitor, arg);
        visitor.visitLdcInsn(member.getName());
        visitor.visitInsn(AASTORE);
        arg++;
    }
    visitor.visitFieldInsn(PUTFIELD, owner, "members", "[Ljava/lang/String;");
}

From source file:org.eclipse.golo.compiler.JavaBytecodeUnionGenerator.java

License:Open Source License

private void makeToString(ClassWriter classWriter, UnionValue value) {
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    visitor.visitCode();//from   w w w .ja  v  a2 s.com
    if (!value.hasMembers()) {
        visitor.visitLdcInsn(
                "union " + value.getUnion().getPackageAndClass().className() + "." + value.getName());
    } else {
        visitor.visitTypeInsn(NEW, "java/lang/StringBuilder");
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn(
                "union " + value.getUnion().getPackageAndClass().className() + "." + value.getName() + "{");
        visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V",
                false);
        visitor.visitVarInsn(ASTORE, 1);
        boolean first = true;
        for (Member member : value.getMembers()) {
            visitor.visitVarInsn(ALOAD, 1);
            visitor.visitLdcInsn((first ? "" : ", ") + member.getName() + "=");
            visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                    "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
            visitor.visitInsn(POP);

            visitor.visitVarInsn(ALOAD, 1);
            visitor.visitVarInsn(ALOAD, 0);
            visitor.visitFieldInsn(GETFIELD, value.getPackageAndClass().toJVMType(), member.getName(),
                    "Ljava/lang/Object;");
            visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                    "(Ljava/lang/Object;)Ljava/lang/StringBuilder;", false);
            visitor.visitInsn(POP);
            first = false;
        }

        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitLdcInsn("}");
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        visitor.visitInsn(POP);
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;",
                false);
    }
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:org.eclipse.m2m.atl.emftvm.jit.CodeBlockJIT.java

License:Open Source License

/**
 * Generates bytecode for checking the VM monitor
 * @param mv the method visitor to generate code for
 * @param pc the current program counter
 *//*from www .j a  v a2  s  .co  m*/
protected static void generateCheckMonitor(final MethodVisitor mv, final int pc) {
    // Labels
    final Label notTerminated = new Label();
    // Generate bytecode
    mv.visitVarInsn(ALOAD, 3); // monitor: [..., monitor]
    mv.visitMethodInsn(INVOKEINTERFACE, // monitor.isTerminated(): [..., boolean]
            Type.getInternalName(VMMonitor.class), "isTerminated",
            Type.getMethodDescriptor(Type.BOOLEAN_TYPE, new Type[0]));
    mv.visitJumpInsn(IFEQ, notTerminated); // jump if isTerminated == false: [...]
    mv.visitTypeInsn(NEW, Type.getInternalName(VMException.class)); // new VMException: [..., vme]
    mv.visitInsn(DUP); // [..., vme, vme]
    mv.visitVarInsn(ALOAD, 1); // frame: [..., vme, vme, frame]
    mv.visitLdcInsn("Execution terminated."); // [..., vme, vme, frame, msg]
    mv.visitMethodInsn(INVOKESPECIAL, // vme.<init>(frame, msg): [..., vme]
            Type.getInternalName(VMException.class), "<init>", Type.getMethodDescriptor(Type.VOID_TYPE,
                    new Type[] { Type.getType(StackFrame.class), Type.getType(String.class) }));
    mv.visitInsn(ATHROW); // throw vme: [...]
    mv.visitLabel(notTerminated);
    mv.visitVarInsn(ALOAD, 1); // frame: [..., frame]
    generatePushInt(mv, pc); // [..., frame, pc]
    mv.visitMethodInsn(INVOKEVIRTUAL, // frame.setPc(pc): [...] 
            Type.getInternalName(StackFrame.class), "setPc",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.INT_TYPE }));
    mv.visitVarInsn(ALOAD, 3); // monitor: [..., monitor]
    mv.visitVarInsn(ALOAD, 1); // frame: [..., monitor, frame]
    mv.visitMethodInsn(INVOKEINTERFACE, // monitor.step(frame): [...]
            Type.getInternalName(VMMonitor.class), "step",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { Type.getType(StackFrame.class) }));
}

From source file:org.eclipse.m2m.atl.emftvm.jit.CodeBlockJIT.java

License:Open Source License

/**
 * Generates an optimised instruction for pushing a constant integer <code>value</code>
 * onto the stack.//from   ww  w .ja va2 s.  co m
 * @param value the constant integer value to push
 */
static void generatePushInt(final MethodVisitor mv, final int value) {
    if (value >= -1 && value <= 5) {
        switch (value) {
        case -1:
            mv.visitInsn(ICONST_M1);
            break;
        case 0:
            mv.visitInsn(ICONST_0);
            break;
        case 1:
            mv.visitInsn(ICONST_1);
            break;
        case 2:
            mv.visitInsn(ICONST_2);
            break;
        case 3:
            mv.visitInsn(ICONST_3);
            break;
        case 4:
            mv.visitInsn(ICONST_4);
            break;
        default:
            mv.visitInsn(ICONST_5);
            assert value == 5;
            break;
        }
    } else if (value < Byte.MAX_VALUE && value > Byte.MIN_VALUE) {
        mv.visitIntInsn(BIPUSH, value);
    } else if (value < Short.MAX_VALUE && value > Short.MIN_VALUE) {
        mv.visitIntInsn(SIPUSH, value);
    } else {
        mv.visitLdcInsn(value);
    }
}

From source file:org.eclipse.objectteams.otredyn.bytecode.asm.AddAfterClassLoadingHook.java

License:Open Source License

void createHookCall(MethodVisitor clinit) {
    if (clazz.isTeam())
        clinit.visitLdcInsn(Type.getObjectType(clazz.getName().replace('.', '/')));
    else/*  w w w.j ava2  s .  c o  m*/
        clinit.visitInsn(Opcodes.ACONST_NULL);
    clinit.visitMethodInsn(INVOKESTATIC, TARGET_CLASS_NAME, TARGET_METHOD_NAME, TARGET_METHOD_DESC, false);
}