Example usage for org.objectweb.asm Label Label

Introduction

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

Prototype

public Label() 

Source Link

Document

Constructs a new label.

Usage

From source file:com.microsoft.applicationinsights.agent.internal.agent.redis.JedisMethodVisitor.java

License:Open Source License

private void reportFinishWithArgs1(int opcode) {

    int resultIndex = this.newLocal(Type.getType(Integer.class));
    super.visitFieldInsn(GETSTATIC, ImplementationsCoordinator.internalName, "INSTANCE",
            ImplementationsCoordinator.internalNameAsJavaName);

    mv.visitLdcInsn(getMethodName());//w w w .j a  v  a 2  s . c om

    mv.visitMethodInsn(INVOKEVIRTUAL, ImplementationsCoordinator.internalName, FINISH_DETECT_METHOD_NAME,
            FINISH_METHOD_DEFAULT_SIGNATURE, false);

    mv.visitVarInsn(ISTORE, resultIndex);
    mv.visitVarInsn(ILOAD, resultIndex);
    Label ok = new Label();
    mv.visitJumpInsn(IFEQ, ok);

    int boxedArgumentsIndex = 0;
    int argumentIndex = isMethodStatic() ? 0 : 1;

    TempArrayVar arrayOfArgumentsAfterBoxing;
    arrayOfArgumentsAfterBoxing = createArray(numberOfArguments());

    // Fill the array with method parameters after boxing the primitive ones.
    for (Type argumentType : getArgumentTypes()) {
        setBoxedValueIntoArray(arrayOfArgumentsAfterBoxing, boxedArgumentsIndex, argumentType, argumentIndex);

        boxedArgumentsIndex++;
        if (ByteCodeUtils.isLargeType(argumentType)) {
            argumentIndex += 2;
        } else {
            ++argumentIndex;
        }
    }

    super.visitFieldInsn(GETSTATIC, ImplementationsCoordinator.internalName, "INSTANCE",
            ImplementationsCoordinator.internalNameAsJavaName);

    mv.visitLdcInsn(getMethodName());
    mv.visitVarInsn(Opcodes.ALOAD, arrayOfArgumentsAfterBoxing.tempVarIndex);

    mv.visitMethodInsn(INVOKEVIRTUAL, ImplementationsCoordinator.internalName, FINISH_DETECT_METHOD_NAME,
            FINISH_METHOD_DEFAULT_SIGNATURE, false);

    mv.visitLabel(ok);

    super.byteCodeForMethodExit(opcode);
}

---

From source file:com.microsoft.applicationinsights.agent.internal.agent.RestTemplateMethodVisitor.java

License:Open Source License

@Override
public void onMethodEnter() {
    int stringLocalIndex = this.newLocal(Type.getType(String.class));

    mv.visitVarInsn(ALOAD, 1);/*ww w  .  j  a  v  a2 s  . co m*/
    Label nullLabel = new Label();

    mv.visitJumpInsn(IFNULL, nullLabel);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/net/URI", "toString", "()Ljava/lang/String;", false);
    mv.visitVarInsn(ASTORE, stringLocalIndex);

    super.visitFieldInsn(GETSTATIC, ImplementationsCoordinator.internalName, "INSTANCE",
            ImplementationsCoordinator.internalNameAsJavaName);
    mv.visitLdcInsn(getMethodName());
    mv.visitVarInsn(ALOAD, stringLocalIndex);
    mv.visitMethodInsn(INVOKEVIRTUAL, ImplementationsCoordinator.internalName, ON_ENTER_METHOD_NAME,
            ON_ENTER_METHOD_SIGNATURE, false);

    Label notNullLabel = new Label();
    mv.visitJumpInsn(GOTO, notNullLabel);

    mv.visitLabel(nullLabel);

    super.visitFieldInsn(GETSTATIC, ImplementationsCoordinator.internalName, "INSTANCE",
            ImplementationsCoordinator.internalNameAsJavaName);
    mv.visitLdcInsn(getMethodName());
    mv.visitInsn(ACONST_NULL);

    mv.visitMethodInsn(INVOKEVIRTUAL, ImplementationsCoordinator.internalName, ON_ENTER_METHOD_NAME,
            ON_ENTER_METHOD_SIGNATURE, false);

    mv.visitLabel(notNullLabel);
}

---

From source file:com.microsoft.applicationinsights.agent.internal.agent.sql.PreparedStatementSetMethod.java

License:Open Source License

@Override
protected void onMethodEnter() {
    if (!"setInt".equals(methodName)) {
        return;// w  ww.ja v a  2 s  .c om
    }
    if (!"setShort".equals(methodName)) {
        return;
    }

    if (!"setBoolean".equals(methodName)) {
        return;
    }

    localIndex = this.newLocal(Type.INT_TYPE);
    tmpArrayIndex = this.newLocal(Type.getType(Object.class));

    System.out.println("index: " + methodName + " " + localIndex + " " + tmpArrayIndex);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    Label l0 = new Label();
    mv.visitJumpInsn(IFNONNULL, l0);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitInsn(ICONST_1);
    mv.visitInsn(IADD);
    mv.visitVarInsn(ISTORE, localIndex);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ILOAD, 3);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    mv.visitFieldInsn(PUTFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    Label l1 = new Label();
    mv.visitJumpInsn(GOTO, l1);
    mv.visitLabel(l0);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    mv.visitInsn(ARRAYLENGTH);
    mv.visitVarInsn(ISTORE, localIndex);
    mv.visitVarInsn(ILOAD, localIndex);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IF_ICMPGE, l1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    mv.visitVarInsn(ASTORE, tmpArrayIndex);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");

    mv.visitFieldInsn(PUTFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    mv.visitVarInsn(ALOAD, tmpArrayIndex);
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ALOAD, tmpArrayIndex);
    mv.visitInsn(ARRAYLENGTH);
    mv.visitMethodInsn(INVOKESTATIC, "java/lang/System", "arraycopy",
            "(Ljava/lang/Object;ILjava/lang/Object;II)V", false);
    mv.visitLabel(l1);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, owner, SqlConstants.AI_SDK_ARGS_ARRAY, "[Ljava/lang/Object;");
    mv.visitVarInsn(ILOAD, 1);

    addArgument();
    mv.visitInsn(AASTORE);
}

---

From source file:com.microsoft.applicationinsights.agent.internal.agent.sql.QueryStatementWithPossibleExplainMethodVisitor.java

License:Open Source License

@Override
protected void onMethodEnter() {

    mv.visitVarInsn(ALOAD, 1);/* w  w w .  j  a  va2s .  c o  m*/
    mv.visitLdcInsn("EXPLAIN");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "startsWith", "(Ljava/lang/String;)Z", false);
    Label l0 = new Label();
    mv.visitJumpInsn(IFNE, l0);

    super.visitFieldInsn(GETSTATIC, ImplementationsCoordinator.internalName, "INSTANCE",
            ImplementationsCoordinator.internalNameAsJavaName);
    mv.visitLdcInsn(getMethodName());
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, ImplementationsCoordinator.internalName, ON_ENTER_METHOD_NANE,
            ON_ENTER_METHOD_SIGNATURE, false);

    mv.visitLabel(l0);
}

---

From source file:com.microsoft.applicationinsights.agent.internal.agent.sql.QueryStatementWithPossibleExplainMethodVisitor.java

License:Open Source License

@Override
protected void byteCodeForMethodExit(int opcode) {
    mv.visitVarInsn(ALOAD, 1);/* ww w  . ja  va2 s .  c  o  m*/
    mv.visitLdcInsn("EXPLAIN");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "startsWith", "(Ljava/lang/String;)Z", false);
    Label l0 = new Label();
    mv.visitJumpInsn(IFNE, l0);

    super.byteCodeForMethodExit(opcode);

    mv.visitLabel(l0);
}

---

From source file:com.mogujie.instantrun.IncrementalChangeVisitor.java

License:Apache License

public void addSupportMethod() {
    int access = Opcodes.ACC_PUBLIC;
    Method m = new Method("isSupport", "(I)Z");
    MethodVisitor mv = super.visitMethod(access, m.getName(), m.getDescriptor(), null, null);

    mv.visitCode();/*from   w w w .  j  av a2 s.  co  m*/
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    //        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "hashCode", "()I", false);

    int[] hashArray = new int[fixMtds.size()];
    Label[] labelArray = new Label[fixMtds.size()];
    Label l0 = new Label();
    Label l1 = new Label();
    for (int i = 0; i < fixMtds.size(); i++) {
        hashArray[i] = AcesoProguardMap.instance().getClassData(visitedClassName).getMtdIndex(fixMtds.get(i));
        labelArray[i] = l0;
    }

    mv.visitLookupSwitchInsn(l1, hashArray, labelArray);
    mv.visitLabel(l0);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.ICONST_1);
    mv.visitInsn(Opcodes.IRETURN);
    mv.visitLabel(l1);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitInsn(Opcodes.IRETURN);
    mv.visitMaxs(1, 2);
    mv.visitEnd();

    mv.visitMaxs(0, 0);
    mv.visitEnd();

}

---

From source file:com.mogujie.instantrun.IntSwitch.java

License:Apache License

private void visitx(GeneratorAdapter mv, List<String> strings) {
    if (strings.size() == 1) {
        visitCase(strings.get(0));//from www .jav  a 2s  . c o m
        return;
    }
    for (String string : strings) {
        Label label = new Label();
        visitString();
        mv.visitLdcInsn(string);
        mv.invokeVirtual(STRING_TYPE, Method.getMethod("boolean equals(Object)"));
        mv.visitJumpInsn(Opcodes.IFEQ, label);
        visitCase(string);
        mv.visitLabel(label);
    }

    visitDefault();
}

---

From source file:com.mogujie.instantrun.IntSwitch.java

License:Apache License

private void visitClassifier(GeneratorAdapter mv, Set<String> strings) {
    visitInt();//from   w w w.  j a  va2  s. co m

    Multimap<Integer, String> buckets = Multimaps.index(strings, HASH_METHOD);
    List<Map.Entry<Integer, Collection<String>>> sorted = Ordering.natural()
            .onResultOf(new Function<Map.Entry<Integer, Collection<String>>, Integer>() {
                @Override
                public Integer apply(Map.Entry<Integer, Collection<String>> entry) {
                    return entry.getKey();
                }
            }).immutableSortedCopy(buckets.asMap().entrySet());

    int sortedHashes[] = new int[sorted.size()];
    List<String> sortedCases[] = new List[sorted.size()];
    int index = 0;
    for (Map.Entry<Integer, Collection<String>> entry : sorted) {
        sortedHashes[index] = entry.getKey();
        sortedCases[index] = Lists.newCopyOnWriteArrayList(entry.getValue());
        index++;
    }

    // Label for each hash and for default.
    Label labels[] = new Label[sorted.size()];
    Label defaultLabel = new Label();
    for (int i = 0; i < sorted.size(); ++i) {
        labels[i] = new Label();
    }

    // Create a switch that dispatches to each label from the hash code of
    mv.visitLookupSwitchInsn(defaultLabel, sortedHashes, labels);

    // Create the cases.
    for (int i = 0; i < sorted.size(); ++i) {
        mv.visitLabel(labels[i]);
        visitx(mv, sortedCases[i]);
    }
    mv.visitLabel(defaultLabel);
    visitDefault();
}

---

From source file:com.mogujie.instantrun.Redirection.java

License:Apache License

/**
 * Adds the instructions to do a generic redirection.
 *//*  ww w . j  ava 2  s. c  o  m*/
protected void redirect(GeneratorAdapter mv, int change) {
    // code to check if a new implementation of the current class is available.
    Label l0 = new Label();
    mv.loadLocal(change);
    mv.visitJumpInsn(Opcodes.IFNULL, l0);
    doRedirect(mv, change);

    // Return
    if (type == Type.VOID_TYPE) {
        mv.pop();
    } else {
        ByteCodeUtils.unbox(mv, type);
    }
    mv.returnValue();

    // jump label for classes without any new implementation, just invoke the original
    // method implementation.
    mv.visitLabel(l0);
}

---

From source file:com.mto.asm.helloworld.ASMCodeGenerator.java

License:Open Source License

/**
 * Generate the byte code of a simple HelloWorld program
 *
 * public class HelloWorld/*w  w w.  java 2s.c  om*/
 * {
 *    public void sayHello()
 *    {
 *       System.out.println("Hello World");
 *    }
 * }
 * @return
 */
public byte[] generateHelloWorld() {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;

    cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, "com/mto/asm/helloworld/HelloWorld", null, "java/lang/Object", null);

    cw.visitSource("HelloWorld.java", null);

    mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitLineNumber(25, l0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    mv.visitInsn(RETURN);
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLocalVariable("this", "Lcom/mto/asm/helloworld/HelloWorld;", null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    mv = cw.visitMethod(ACC_PUBLIC, "sayHello", "()V", null, null);
    mv.visitCode();
    l0 = new Label();
    mv.visitLabel(l0);
    mv.visitLineNumber(29, l0);
    mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    mv.visitLdcInsn("Hello World");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
    l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLineNumber(30, l1);
    mv.visitInsn(RETURN);
    Label l2 = new Label();
    mv.visitLabel(l2);
    mv.visitLocalVariable("this", "Lcom/mto/asm/helloworld/HelloWorld;", null, l0, l2, 0);
    mv.visitMaxs(2, 1);
    mv.visitEnd();
    cw.visitEnd();

    return cw.toByteArray();
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »