Example usage for org.objectweb.asm MethodVisitor visitJumpInsn

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

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Introduction

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

Prototype

public void visitJumpInsn(final int opcode, final Label label)

Source Link

Document

Visits a jump instruction.

Usage

From source file:com.github.stokito.gag.agent.ThisHadBetterGenerator.java

License:Apache License

private static void visitNullCheck(MethodVisitor mv, boolean be, LocalVarInfo param, Label okay) {
    switch (param.getType().getSort()) {
    case Type.ARRAY:
    case Type.OBJECT:
        mv.visitVarInsn(ALOAD, param.getIndex());
        break;/*w ww . jav a2  s  . c  om*/
    default:
        throw new AnnotationStateError("Unsupported type: " + param.getType());
    }

    mv.visitJumpInsn(be ? IFNULL : IFNONNULL, okay);
}

From source file:com.github.stokito.gag.agent.ThisHadBetterGenerator.java

License:Apache License

/**
 * The given Property needs to be either {@link Property#THE_BLUE_PILL} or
 * {@link Property#THE_RED_PILL}./*  www  . j av  a 2s . c om*/
 */
private static void visitPill(MethodVisitor mv, boolean be, Property property, LocalVarInfo param, Label okay) {

    if (param.getType().getSort() != Type.OBJECT) {
        throw new AnnotationStateError("Unsupported type: " + param.getType());
    }

    // TODO: Also handle if parameter is null.

    Label notOkay = new Label();

    // See if the param type matches a Pill type
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitMethodInsn(INVOKEVIRTUAL, param.getType().getInternalName(), "getClass", "()Ljava/lang/Class;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getName", "()Ljava/lang/String;");
    mv.visitLdcInsn("Pill|ThePill|.*[\\.$]Pill|.*[\\.$]ThePill");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "matches", "(Ljava/lang/String;)Z");

    if (be) {
        // If the param type does not match a Pill type, that's not okay, go to exception.
        mv.visitJumpInsn(FALSE, notOkay);
    } else {
        // If the param type does not match a Pill type, then that's okay, skip exception.
        mv.visitJumpInsn(FALSE, okay);
    }

    // At this point, the param type matches a Pill type.
    // So check if the param type is an enum type.
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitTypeInsn(INSTANCEOF, "java/lang/Enum");

    if (be) {
        // If the param type is not an enum, that's not okay, go to exception.
        mv.visitJumpInsn(FALSE, notOkay);
    } else {
        // If the param type is not an enum, that's okay, skip exception.
        mv.visitJumpInsn(FALSE, okay);
    }

    // Check that the Pill type has the property specified in the annotation.
    // First try to match on "BLUE" (or "RED").
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitTypeInsn(CHECKCAST, "java/lang/Enum");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Enum", "name", "()Ljava/lang/String;");
    mv.visitLdcInsn(property == THE_BLUE_PILL ? "BLUE" : "RED");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z");
    mv.visitJumpInsn(TRUE, be ? okay : notOkay);

    // Then try to see if the value ends with "BLUE_PILL" (or "RED_PILL").
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitTypeInsn(CHECKCAST, "java/lang/Enum");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Enum", "name", "()Ljava/lang/String;");
    mv.visitLdcInsn(property == THE_BLUE_PILL ? "BLUE_PILL" : "RED_PILL");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "endsWith", "(Ljava/lang/String;)Z");
    mv.visitJumpInsn(be ? TRUE : FALSE, okay);

    mv.visitLabel(notOkay);
}

From source file:com.github.stokito.gag.agent.ThisHadBetterGenerator.java

License:Apache License

private static void visitDeathStarPlans(MethodVisitor mv, boolean be, LocalVarInfo param, Label okay) {

    if (param.getType().getSort() != Type.OBJECT) {
        throw new AnnotationStateError("Unsupported type: " + param.getType());
    }//from   w  w w.  ja v  a2s.  c  o  m

    Label notOkay = new Label();

    // See if the param type matches a DeathStarPlans type
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitMethodInsn(INVOKEVIRTUAL, param.getType().getInternalName(), "getClass", "()Ljava/lang/Class;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getName", "()Ljava/lang/String;");
    mv.visitLdcInsn("DeathStarPlans|TheDeathStarPlans|.*[\\.$]DeathStarPlans|.*[\\.$]TheDeathStarPlans");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "matches", "(Ljava/lang/String;)Z");

    if (be) {
        // If the param type does not match a DeathStarPlans type, that's not okay, go to exception.
        mv.visitJumpInsn(FALSE, notOkay);
    } else {
        // If the param type does not match a DeathStarPlans type, then that's okay, skip exception.
        mv.visitJumpInsn(FALSE, okay);
    }

    // At this point, the param type matches a DeathStarPlans type.
    // So check if the param has an isStolen method.
    Label start = new Label();
    Label end = new Label();
    Label handler = new Label();
    mv.visitTryCatchBlock(start, end, handler, null);

    mv.visitLabel(start);
    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitMethodInsn(INVOKEVIRTUAL, param.getType().getInternalName(), "getClass", "()Ljava/lang/Class;");
    mv.visitLdcInsn("isStolen");
    mv.visitInsn(ACONST_NULL);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getMethod",
            "(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;");

    mv.visitVarInsn(ALOAD, param.getIndex());
    mv.visitInsn(ACONST_NULL);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/Method", "invoke",
            "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");
    mv.visitTypeInsn(CHECKCAST, "java/lang/Boolean");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z");

    mv.visitJumpInsn(be ? TRUE : FALSE, okay);

    mv.visitLabel(end);
    mv.visitJumpInsn(GOTO, notOkay);
    mv.visitLabel(handler);
    mv.visitInsn(POP);

    mv.visitLabel(notOkay);
}

From source file:com.github.wolf480pl.mias4j.MakeTestMH.java

License:Open Source License

public static byte[] dump() throws Exception {

    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;

    cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "TestMH", null, "java/lang/Object", null);

    cw.visitInnerClass("java/lang/invoke/MethodHandles$Lookup", "java/lang/invoke/MethodHandles", "Lookup",
            ACC_PUBLIC + ACC_FINAL + ACC_STATIC);

    {/*w ww  .  j  a va  2 s .c  om*/
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
        mv.visitCode();
        Label l0 = new Label();
        Label l1 = new Label();
        Label l2 = new Label();
        mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Throwable");
        mv.visitLabel(l0);
        /*mv.visitMethodInsn(INVOKESTATIC, "java/lang/invoke/MethodHandles", "lookup", "()Ljava/lang/invoke/MethodHandles$Lookup;", false);
        mv.visitLdcInsn(Type.getType("Ljava/io/PrintStream;"));
        mv.visitLdcInsn("println");
        mv.visitFieldInsn(GETSTATIC, "java/lang/Void", "TYPE", "Ljava/lang/Class;");
        mv.visitLdcInsn(Type.getType("Ljava/lang/String;"));
        mv.visitMethodInsn(INVOKESTATIC, "java/lang/invoke/MethodType", "methodType", "(Ljava/lang/Class;Ljava/lang/Class;)Ljava/lang/invoke/MethodType;", false);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandles$Lookup", "findVirtual", "(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;", false);*/
        mv.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, "java/io/PrintStream", "println",
                Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(String.class))));
        mv.visitVarInsn(ASTORE, 1);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
        mv.visitLdcInsn("hey");
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandle", "invoke",
                "(Ljava/io/PrintStream;Ljava/lang/String;)V", false);
        mv.visitLabel(l1);
        Label l3 = new Label();
        mv.visitJumpInsn(GOTO, l3);
        mv.visitLabel(l2);
        mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] { "java/lang/Throwable" });
        mv.visitVarInsn(ASTORE, 1);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Throwable", "printStackTrace", "()V", false);
        mv.visitLabel(l3);
        mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitInsn(RETURN);
        mv.visitMaxs(5, 2);
        mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void exclude(Exclude exclude, int event, MethodVisitor visitor) {
    visitor.visitVarInsn(ALOAD, event);//from   w  w w.ja v a2  s. c  o m
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
            "getClass", BytecodeEventListenerGeneration.getClassMethod.getDescriptor(), false);
    Label returnLabel = new Label();
    Label continueLabel = new Label();
    for (Class clazz : exclude.value()) {
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn(Type.getType(clazz));
        visitor.visitInsn(SWAP);
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
                "equals", BytecodeEventListenerGeneration.equalsMethod.getDescriptor(), false);
        visitor.visitJumpInsn(IFNE, returnLabel);
    }
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void include(Include include, int event, MethodVisitor visitor) {
    visitor.visitVarInsn(ALOAD, event);//from   w ww  . j  av  a2  s. c  om
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
            "getClass", BytecodeEventListenerGeneration.getClassMethod.getDescriptor(), false);
    Label returnLabel = new Label();
    Label continueLabel = new Label();
    for (Class clazz : include.value()) {
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn(Type.getType(clazz));
        visitor.visitInsn(SWAP);
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
                "equals", BytecodeEventListenerGeneration.equalsMethod.getDescriptor(), false);
        visitor.visitJumpInsn(IFEQ, returnLabel);
    }
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void cancelled(Cancelled cancelled, int event, Class eventClass, MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();
    visitor.visitVarInsn(ALOAD, event);// w w  w .  j  a va 2s.  c  o m
    if (CancellableEvent.class.isAssignableFrom(eventClass)) { //Assume cancelled
        visitor.visitMethodInsn(INVOKEINTERFACE,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName(), "isCancelled",
                BytecodeEventListenerGeneration.isCancelledEventMethod.getDescriptor(), true);
        if (cancelled.value()) {
            visitor.visitJumpInsn(IFEQ, returnLabel);
        } else {
            visitor.visitJumpInsn(IFNE, returnLabel);
        }
    } else { //Check instance
        Label cleanLabel = new Label();
        Label continueLabel2 = new Label();
        visitor.visitInsn(DUP);
        visitor.visitTypeInsn(INSTANCEOF,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName());
        visitor.visitJumpInsn(IFEQ, cleanLabel);

        visitor.visitJumpInsn(GOTO, continueLabel2);

        visitor.visitLabel(cleanLabel);
        visitor.visitInsn(POP);
        visitor.visitJumpInsn(GOTO, continueLabel);

        visitor.visitLabel(continueLabel2);

        visitor.visitTypeInsn(CHECKCAST,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName());
        visitor.visitMethodInsn(INVOKEINTERFACE,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName(), "isCancelled",
                BytecodeEventListenerGeneration.isCancelledEventMethod.getDescriptor(), true);
        if (cancelled.value()) {
            visitor.visitJumpInsn(IFEQ, returnLabel);
        } else {
            visitor.visitJumpInsn(IFNE, returnLabel);
        }
    }
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void firstCause(FirstCause firstCause, Class type, int param, int event, MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);/*from w  w w .  j ava2s.co m*/
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "cause", BytecodeEventListenerGeneration.eventCauseMethod.getDescriptor(), true);
    visitor.visitLdcInsn(Type.getType(type));
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.causeType.getInternalName(), "first",
            BytecodeEventListenerGeneration.causeFirstMethod.getDescriptor(), false);
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void lastCause(LastCause lastCause, Class type, int param, int event, MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);//from   w w w.j  a va 2 s  .c  om
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "cause", BytecodeEventListenerGeneration.eventCauseMethod.getDescriptor(), true);
    visitor.visitLdcInsn(Type.getType(type));
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.causeType.getInternalName(), "last",
            BytecodeEventListenerGeneration.causeLastMethod.getDescriptor(), false);
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void getContext(GetContext getContext, String paramName, Class type, int param, int event,
        MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);/*from www  .  ja  v  a2s .c o  m*/
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "context", BytecodeEventListenerGeneration.eventContextMethod.getDescriptor(), true);
    visitor.visitLdcInsn(getContext.value().equals(GetContext.REFER_TO_PARAM) ? param : getContext.value());
    visitor.visitLdcInsn(Type.getType(type));
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.contextType.getInternalName(), "get",
            BytecodeEventListenerGeneration.contextGetMethod.getDescriptor(), false);
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}