Example usage for org.objectweb.asm MethodVisitor visitMethodInsn

Introduction

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

Prototype

@Deprecated
public void visitMethodInsn(final int opcode, final String owner, final String name, final String descriptor)

Source Link

Document

Visits a method instruction.

Usage

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

private void emitPostRestore(MethodVisitor mv) {
    mv.visitVarInsn(Opcodes.ALOAD, lvarStack);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "postRestore", "()V");
}

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

private void emitPreemptionPoint(MethodVisitor mv, int type) {
    mv.visitVarInsn(Opcodes.ALOAD, lvarStack);
    switch (type) {
    case 0:/*  w ww.  jav a  2s  .c  o  m*/
        mv.visitInsn(Opcodes.ICONST_0);
        break;
    case 1:
        mv.visitInsn(Opcodes.ICONST_1);
        break;
    case 2:
        mv.visitInsn(Opcodes.ICONST_2);
        break;
    case 3:
        mv.visitInsn(Opcodes.ICONST_3);
        break;
    default:
        throw new AssertionError("Unsupported type: " + type);
    }
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "preemptionPoint", "(I)V");
}

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

private void emitStoreValue(MethodVisitor mv, BasicValue v, int lvarStack, int idx, int lvar)
        throws InternalError, IndexOutOfBoundsException {
    String desc;//  www.j av a 2  s .c om

    switch (v.getType().getSort()) {
    case Type.OBJECT:
    case Type.ARRAY:
        desc = "(Ljava/lang/Object;L" + STACK_NAME + ";I)V";
        break;
    case Type.BOOLEAN:
    case Type.BYTE:
    case Type.SHORT:
    case Type.CHAR:
    case Type.INT:
        desc = "(IL" + STACK_NAME + ";I)V";
        break;
    case Type.FLOAT:
        desc = "(FL" + STACK_NAME + ";I)V";
        break;
    case Type.LONG:
        desc = "(JL" + STACK_NAME + ";I)V";
        break;
    case Type.DOUBLE:
        desc = "(DL" + STACK_NAME + ";I)V";
        break;
    default:
        throw new InternalError("Unexpected type: " + v.getType());
    }

    mv.visitVarInsn(Opcodes.ALOAD, lvarStack);
    //        if (v.getType().getSort() == Type.OBJECT || v.getType().getSort() == Type.ARRAY)
    //            println(mv, "STORE " + (lvar >= 0 ? ("VAR " + lvar + ": ") : "OPRND: "));
    emitConst(mv, idx);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, STACK_NAME, "push", desc);
}

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

private void emitRestoreValue(MethodVisitor mv, BasicValue v, int lvarStack, int idx, int lvar) {
    mv.visitVarInsn(Opcodes.ALOAD, lvarStack);
    emitConst(mv, idx);// w  ww .j a  v a2s  .  c om

    switch (v.getType().getSort()) {
    case Type.OBJECT:
        String internalName = v.getType().getInternalName();
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getObject", "(I)Ljava/lang/Object;");
        if (!internalName.equals("java/lang/Object")) // don't cast to Object ;)
            mv.visitTypeInsn(Opcodes.CHECKCAST, internalName);
        //                println(mv, "RESTORE " + (lvar >= 0 ? ("VAR " + lvar + ": ") : "OPRND: "));
        break;
    case Type.ARRAY:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getObject", "(I)Ljava/lang/Object;");
        mv.visitTypeInsn(Opcodes.CHECKCAST, v.getType().getDescriptor());
        break;
    case Type.BYTE:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I");
        mv.visitInsn(Opcodes.I2B);
        break;
    case Type.SHORT:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I");
        mv.visitInsn(Opcodes.I2S);
        break;
    case Type.CHAR:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I");
        mv.visitInsn(Opcodes.I2C);
        break;
    case Type.BOOLEAN:
    case Type.INT:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getInt", "(I)I");
        break;
    case Type.FLOAT:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getFloat", "(I)F");
        break;
    case Type.LONG:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getLong", "(I)J");
        break;
    case Type.DOUBLE:
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, STACK_NAME, "getDouble", "(I)D");
        break;
    default:
        throw new InternalError("Unexpected type: " + v.getType());
    }
}

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

private void println(MethodVisitor mv, String prefix, int refVar) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "err", "Ljava/io/PrintStream;");
    mv.visitTypeInsn(Opcodes.NEW, "java/lang/StringBuilder");
    mv.visitInsn(Opcodes.DUP);//ww w  .ja  va2 s  .co  m
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V");
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Thread", "currentThread", "()Ljava/lang/Thread;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Thread", "getName", "()Ljava/lang/String;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;");
    mv.visitLdcInsn(" " + prefix);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;");
    mv.visitLdcInsn(" var " + refVar + ":");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;");

    mv.visitVarInsn(Opcodes.ALOAD, refVar);

    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/Object;)Ljava/lang/StringBuilder;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
}

From source file:co.paralleluniverse.fibers.instrument.InstrumentMethod.java

License:Open Source License

private void println(MethodVisitor mv, String prefix) {
    mv.visitInsn(Opcodes.DUP); // S1 S1

    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "err", "Ljava/io/PrintStream;"); // PrintStream S1 S1

    mv.visitInsn(Opcodes.SWAP); // S1 PrintStream S1

    mv.visitTypeInsn(Opcodes.NEW, "java/lang/StringBuilder"); // StringBuilder S1 PrintStream S1
    mv.visitInsn(Opcodes.DUP); // StringBuilder StringBuilder S1 PrintStream S1
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V"); // StringBuilder S1 PrintStream S1
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Thread", "currentThread", "()Ljava/lang/Thread;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Thread", "getName", "()Ljava/lang/String;");
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;");
    mv.visitLdcInsn(" " + prefix); // prefix StringBuilder S1 PrintStream S1
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;"); // StringBuilder S1 PrintStream S1

    mv.visitInsn(Opcodes.SWAP); // S1 StringBuilder PrintStream S1

    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/Object;)Ljava/lang/StringBuilder;"); // StringBuilder PrintStream S1
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;"); // PrintStream S1
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V"); // S1
}

From source file:com.alibaba.hotswap.processor.clinit.ClinitVisitor.java

License:Open Source License

@Override
public void visitEnd() {
    // If no clinit method, then add it
    if (!hasClinitMethod) {
        if (!isInterface) {
            int access = Opcodes.ACC_STATIC + Opcodes.ACC_PUBLIC;
            String name = HotswapConstants.HOTSWAP_CLINIT;
            String desc = "()V";
            MethodVisitor mv = super.visitMethod(access, name, desc, null, null);
            if (mv != null) {
                mv.visitCode();/*from   w ww .  j  a v a  2 s  . co  m*/
                mv.visitTypeInsn(Opcodes.NEW, "java/util/concurrent/ConcurrentHashMap");
                mv.visitInsn(Opcodes.DUP);
                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/util/concurrent/ConcurrentHashMap", "<init>",
                        "()V");
                mv.visitFieldInsn(Opcodes.PUTSTATIC, className, HotswapConstants.STATIC_FIELD_HOLDER,
                        "Ljava/util/concurrent/ConcurrentHashMap;");

                mv.visitInsn(Opcodes.RETURN);
                mv.visitMaxs(2, 0);
                mv.visitEnd();
            }

            generateClinit();
        } else {
            generateDefaultClinit();
        }
    } else {
        if (!isInterface) {
            generateClinit();
        }
    }

    super.visitEnd();
}

From source file:com.alibaba.hotswap.processor.clinit.ClinitVisitor.java

License:Open Source License

/**
 * Generate <code>&lt;clinit&gt;</code>, call <code>__$$hotswap_clinit$$__</code>
 *//*from   w  w w . j  a v a  2s  .c o  m*/
private void generateClinit() {
    MethodVisitor clinit = cv.visitMethod(Opcodes.ACC_STATIC, HotswapConstants.CLINIT, "()V", null, null);
    if (clinit != null) {
        clinit.visitCode();

        clinit.visitMethodInsn(Opcodes.INVOKESTATIC, className, HotswapConstants.HOTSWAP_CLINIT, "()V");
        clinit.visitInsn(Opcodes.RETURN);
        clinit.visitMaxs(0, 0);
        clinit.visitEnd();
    }
}

From source file:com.e2info.helloasm.HelloAsmApp.java

License:Open Source License

public static void main(String[] args) throws IOException {
    String name = "HelloAsm";
    int flag = ClassWriter.COMPUTE_MAXS;
    ClassWriter cw = new ClassWriter(flag);
    cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, name, null, "java/lang/Object", null);

    cw.visitSource(name + ".java", null);

    {/*from   w ww . j  a  v  a  2s  .com*/
        MethodVisitor mv;
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(Opcodes.RETURN);
        // we need this call to take effect ClassWriter.COMPUTE_MAXS flag.
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    {
        MethodVisitor mv;
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "main", "([Ljava/lang/String;)V", null,
                null);
        mv.visitCode();
        mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
        mv.visitLdcInsn("hello ASM");
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
        mv.visitInsn(Opcodes.RETURN);
        // we need this call to take effect ClassWriter.COMPUTE_MAXS flag.
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    cw.visitEnd();

    // build binary
    byte[] bin = cw.toByteArray();

    // save asm trace for human readable
    {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        new ClassReader(bin).accept(new TraceClassVisitor(pw), 0);
        File f = new File(name + ".txt");
        FileUtils.writeStringToFile(f, sw.toString());
    }

    // save as calss file
    {
        File f = new File(name + ".class");
        FileUtils.writeByteArrayToFile(f, bin);
    }

}

From source file:com.enea.jcarder.agent.instrument.InstrumentationUtilities.java

License:GNU General Public License

public static void pushClassReferenceToStack(MethodVisitor mv, String className) {
    /*/*from  w  w  w  .  j av  a2  s  .c o  m*/
     * It is not possible to use:
     *
     *     mv.visitLdcInsn(RuleType.getType(mClassName));
     *
     * for class versions before 49.0 (introduced with java 1.5). Therefore
     * we use Class.forName instead.
     *
     * TODO It might be possible to do this more efficiently by caching the
     * result from Class.forName. But note that adding a new field (where
     * the cached class object can be stored) is only possible if the class
     * has not already been loaded by the JVM.
     */
    mv.visitLdcInsn(className);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/lang/Class", "forName",
            "(Ljava/lang/String;)Ljava/lang/Class;");
}