Example usage for org.objectweb.asm MethodVisitor visitVarInsn

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

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Introduction

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

Prototype

public void visitVarInsn(final int opcode, final int var)

Source Link

Document

Visits a local variable instruction.

Usage

From source file:jpcsp.Allegrex.compiler.CodeBlock.java

License:Open Source License

private void addNonStaticMethods(CompilerContext context, ClassVisitor cv) {
    MethodVisitor mv;

    // public int exec(int returnAddress, int alternativeReturnAddress, boolean isJump) throws Exception;
    mv = cv.visitMethod(Opcodes.ACC_PUBLIC, context.getExecMethodName(), context.getExecMethodDesc(), null,
            exceptions);/*from w  w w  .ja  v  a  2 s  .c  om*/
    mv.visitCode();
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, getClassName(), context.getStaticExecMethodName(),
            context.getStaticExecMethodDesc());
    mv.visitInsn(Opcodes.IRETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    // private static IExecutable e;
    FieldVisitor fv = cv.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC, context.getReplaceFieldName(),
            executableDescriptor, null, null);
    fv.visitEnd();

    // public void setExecutable(IExecutable e);
    mv = cv.visitMethod(Opcodes.ACC_PUBLIC, context.getReplaceMethodName(), context.getReplaceMethodDesc(),
            null, exceptions);
    mv.visitCode();
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitFieldInsn(Opcodes.PUTSTATIC, getClassName(), context.getReplaceFieldName(), executableDescriptor);
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(1, 2);
    mv.visitEnd();

    // public IExecutable getExecutable();
    mv = cv.visitMethod(Opcodes.ACC_PUBLIC, context.getGetMethodName(), context.getGetMethodDesc(), null,
            exceptions);
    mv.visitCode();
    mv.visitFieldInsn(Opcodes.GETSTATIC, getClassName(), context.getReplaceFieldName(), executableDescriptor);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:jtaint.ByteCodeUtil.java

License:Apache License

public static void buildGetter(ClassVisitor cv, String owner, String fieldName, String fieldDesc, int accFlags,
        String methodName) {/*from w  ww.  j a  v  a2  s . c  o  m*/
    MethodVisitor mv = cv.visitMethod(accFlags + ACC_PUBLIC, methodName, "()" + fieldDesc, null, null);
    Type t = Type.getType(fieldDesc);

    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, owner, fieldName, fieldDesc);
    mv.visitInsn(t.getOpcode(IRETURN));

    mv.visitMaxs(t.getSize(), 1);
    mv.visitEnd();
}

From source file:jtaint.ByteCodeUtil.java

License:Apache License

public static void buildSetter(ClassVisitor cv, String owner, String fieldName, String fieldDesc, int accFlags,
        String methodName) {/*from   www  .  j av a  2s  . c o m*/
    MethodVisitor mv = cv.visitMethod(accFlags + ACC_PUBLIC, methodName, "(" + fieldDesc + ")V", null, null);
    Type t = Type.getType(fieldDesc);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(t.getOpcode(ILOAD), 1);
    mv.visitFieldInsn(PUTFIELD, owner, fieldName, fieldDesc);
    mv.visitInsn(RETURN);

    mv.visitMaxs(1 + t.getSize(), 1 + t.getSize());
    mv.visitEnd();
}

From source file:jtaint.ClassLoaderAdapter.java

License:Apache License

private void addDefineClassWrapper(String methodName, String methodDesc) {
    MethodVisitor mv = cv.visitMethod(ACC_PRIVATE, ByteCodeUtil.internalName("defineClass"), methodDesc, null,
            null);/*from   w  ww  .j a va  2s  .  c o  m*/
    mv.visitCode();

    mv.visitVarInsn(ALOAD, 0); /* This */
    mv.visitVarInsn(ALOAD, 1); /* String name */
    mv.visitVarInsn(ALOAD, 2); /* Buffer (byte[] or ByteBuffer */
    mv.visitVarInsn(ILOAD, 3); /* offset */
    mv.visitVarInsn(ILOAD, 4); /* len */

    Type[] args = Type.getArgumentTypes(methodDesc);
    Type[] newArgs = new Type[3];
    System.arraycopy(args, 1, newArgs, 0, 3); /* Buffer, offset, len */
    String newDesc = Type.getMethodDescriptor(newArgs[0], newArgs);

    mv.visitMethodInsn(INVOKESTATIC, "jtaint/InstrumentationUtils", "instrument", newDesc);

    if ("Ljava/nio/ByteBuffer;".equals(newArgs[0].getDescriptor())) {
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/nio/ByteBuffer", "position", "()I");
        mv.visitInsn(SWAP);
        mv.visitInsn(DUP_X1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/nio/ByteBuffer", "remaining", "()I");
    } else {
        mv.visitInsn(DUP);
        mv.visitInsn(ARRAYLENGTH);
        mv.visitInsn(ICONST_0);
        mv.visitInsn(SWAP);
    }

    /* Now push all additional arguments */
    int l = 5;
    for (int i = 4; i < args.length; l += args[i].getSize(), i++)
        mv.visitVarInsn(args[i].getOpcode(ILOAD), l);
    mv.visitMethodInsn(INVOKESPECIAL, className, methodName, methodDesc);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(l, l);
    mv.visitEnd();
}

From source file:jtaint.ClassLoaderAdapter.java

License:Apache License

private void addExportWrapper() {
    String desc = "(Ljava/lang/String;)Ljava/lang/Class;";
    MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, ByteCodeUtil.internalName("findLoadedClass"), desc, null,
            null);//from w  w w.ja v  a 2  s . c  om
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, className, "findLoadedClass", desc);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

From source file:jtaint.InstrumentationLockBuilder.java

License:Apache License

private static final void buildIncLock(ClassVisitor cv, String className) {
    MethodVisitor mv;

    mv = cv.visitMethod(ACC_PUBLIC, ByteCodeUtil.internalName("incLock"), "()V", null, null);
    mv.visitCode();//from  w  w  w.  j a  v  a2 s.  c om

    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(DUP);
    mv.visitFieldInsn(GETFIELD, className, ByteCodeUtil.internalName("lock"), "I");
    mv.visitInsn(ICONST_1);
    mv.visitInsn(IADD);
    mv.visitFieldInsn(PUTFIELD, className, ByteCodeUtil.internalName("lock"), "I");
    mv.visitInsn(RETURN);
    mv.visitMaxs(3, 1);

    mv.visitEnd();
}

From source file:jtaint.InstrumentationLockBuilder.java

License:Apache License

private static final void buildDecAndTestLock(ClassVisitor cv, String className) {
    MethodVisitor mv;

    mv = cv.visitMethod(ACC_PUBLIC, ByteCodeUtil.internalName("decAndTestLock"), "()I", null, null);
    mv.visitCode();/*from w  w  w  .  jav a  2s. c  o m*/

    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(DUP);
    mv.visitFieldInsn(GETFIELD, className, ByteCodeUtil.internalName("lock"), "I");
    mv.visitInsn(ICONST_1);
    mv.visitInsn(ISUB);
    mv.visitInsn(DUP_X1);
    mv.visitFieldInsn(PUTFIELD, className, ByteCodeUtil.internalName("lock"), "I");
    mv.visitInsn(IRETURN);
    mv.visitMaxs(3, 1);

    mv.visitEnd();
}

From source file:jtaint.ProcessBuilderAdapter.java

License:Apache License

public MethodVisitor visitMethod(final int access, final String name, final String desc, String signature,
        final String[] exceptions) {

    final MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
    if (!methodList.contains(new MethodDecl(access, name, desc)))
        return mv;
    return new SimpleAdviceAdapter(mv, className, access, name, desc) {
        protected void onMethodEnter() {
            Type cmdType = Type.getArgumentTypes(desc)[0];

            mv.visitVarInsn(ALOAD, 1);
            mv.visitMethodInsn(INVOKESTATIC, "jtaint/ExecUtil", "validateExec",
                    "(" + cmdType.getDescriptor() + ")V");
        }// ww w .j  a v  a 2s.co m
    };
}

From source file:jtaint.RemappingStringClassAdapter.java

License:Apache License

private void buildToString(int access, boolean hasOffset) {
    /* Do not call super.visitMethod, we don't want remapping done here */
    MethodVisitor mv = cv.visitMethod(access, "toString", "()Ljava/lang/String;", null, null);
    if (mv == null)
        return;/*from   w w w . jav  a2s . c o m*/

    if ((access & ACC_ABSTRACT) != 0) {
        mv.visitEnd();
        return;
    }

    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESTATIC, "jtaint/OrigStringUtil", "toBaseString",
            "(L" + className + ";)Ljava/lang/String;");
    mv.visitInsn(ARETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:jtaint.RuntimeAdapter.java

License:Apache License

public MethodVisitor visitMethod(final int access, final String name, final String desc, String signature,
        String[] exceptions) {/*from w  ww.ja  v a2s . c  o m*/

    final MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions);
    if (!methodList.contains(new MethodDecl(access, name, desc)))
        return mv;
    return new SimpleAdviceAdapter(mv, className, access, name, desc) {
        public void onMethodEnter() {
            Type cmdType = Type.getArgumentTypes(desc)[0];

            mv.visitVarInsn(ALOAD, 1);
            mv.visitMethodInsn(INVOKESTATIC, "jtaint/ExecUtil", "validateExec",
                    "(" + cmdType.getDescriptor() + ")V");
        }
    };
}