Example usage for org.objectweb.asm.tree InsnList InsnList

Introduction

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

Prototype

InsnList

Source Link

Usage

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instructions for a label./* www  . ja  va 2 s  .c om*/
 * @param labelNode label to insert
 * @throws NullPointerException if any argument is {@code null}
 * @return instructions for a label
 */
public static InsnList addLabel(LabelNode labelNode) {
    Validate.notNull(labelNode);

    InsnList ret = new InsnList();
    ret.add(labelNode);

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instructions for line numbers. This is useful for debugging. For example, you can put a line number of 99999 or some other
 * special number to denote that the code being executed is instrumented code. Then if a stacktrace happens, you'll know that if
 * instrumented code was immediately involved.
 * @param num line number/*  w  w  w. j  a v a 2s.co m*/
 * @return instructions for a line number
 * @throws IllegalArgumentException if {@code num < 0}
 */
public static InsnList lineNumber(int num) {
    Validate.isTrue(num >= 0);

    InsnList ret = new InsnList();

    LabelNode labelNode = new LabelNode();
    ret.add(labelNode);
    ret.add(new LineNumberNode(num, labelNode));

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instructions for printing out a string constant using {@link System#out}. This is useful for debugging. For example, you
 * can print out lines around your instrumented code to make sure that what you think is being run is actually being run.
 * @param text text to print out/*from   w  w  w  . j av a 2s  .  co m*/
 * @return instructions to call System.out.println with a string constant
 * @throws NullPointerException if any argument is {@code null}
 */
public static InsnList debugPrint(String text) {
    Validate.notNull(text);

    InsnList ret = new InsnList();

    ret.add(new FieldInsnNode(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"));
    ret.add(new LdcInsnNode(text));
    ret.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V",
            false));

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instructions to pop an item off the stack.
 * @return instructions for a pop/*from ww  w.  ja  v  a2 s .c  om*/
 */
public static InsnList pop() {
    InsnList ret = new InsnList();
    ret.add(new InsnNode(Opcodes.POP));

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instructions to pop {@code count} items off the stack.
 * @param count number of items to pop// ww  w. ja v  a2s  .co  m
 * @return instructions for a pop
 * @throws IllegalArgumentException if any numeric argument is negative
 */
public static InsnList pop(int count) {
    Validate.isTrue(count >= 0);
    InsnList ret = new InsnList();
    for (int i = 0; i < count; i++) {
        ret.add(new InsnNode(Opcodes.POP));
    }

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates a MONITORENTER instruction, which consumes an Object from the top of the stack.
 * @return instructions for a pop// ww  w.  j  a  v  a 2s  .c o  m
 */
public static InsnList monitorEnter() {
    InsnList ret = new InsnList();
    ret.add(new InsnNode(Opcodes.MONITORENTER));

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates a MONITOREXIT instruction, which consumes an Object from the top of the stack.
 * @return instructions for a pop/*from  w  ww . j ava 2s .c  o m*/
 */
public static InsnList monitorExit() {
    InsnList ret = new InsnList();
    ret.add(new InsnNode(Opcodes.MONITOREXIT));

    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instructions to push an integer constant on to the stack.
 * @param i integer constant to push/*www  . j  av  a  2s . c om*/
 * @return instructions to push an integer constant
 */
public static InsnList loadIntConst(int i) {
    InsnList ret = new InsnList();
    ret.add(new LdcInsnNode(i));
    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instruction to push a string constant on to the stack.
 * @param s string constant to push/*from w  w  w .  java  2 s  . com*/
 * @return instructions to push a string constant
 * @throws NullPointerException if any argument is {@code null}
 */
public static InsnList loadStringConst(String s) {
    Validate.notNull(s);
    InsnList ret = new InsnList();
    ret.add(new LdcInsnNode(s));
    return ret;
}

From source file:com.offbynull.coroutines.instrumenter.asm.InstructionUtils.java

License:Open Source License

/**
 * Generates instruction to push a null on to the stack.
 * @return instructions to push a null//from   w ww . ja v a 2  s  .c  o  m
 */
public static InsnList loadNull() {
    InsnList ret = new InsnList();
    ret.add(new InsnNode(Opcodes.ACONST_NULL));
    return ret;
}