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

Introduction

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

Prototype

public void set(final AbstractInsnNode oldInsnNode, final AbstractInsnNode newInsnNode) 

Source Link

Document

Replaces an instruction of this list with another instruction.

Usage

From source file:org.parboiled.transform.process.GroupClassGenerator.java

License:Apache License

protected static void convertXLoads(final InstructionGroup group) {
    final String owner = group.getGroupClassType().getInternalName();

    InsnList insnList;

    for (final InstructionGraphNode node : group.getNodes()) {
        if (!node.isXLoad())
            continue;

        final VarInsnNode insn = (VarInsnNode) node.getInstruction();
        final FieldNode field = group.getFields().get(insn.var);
        final FieldInsnNode fieldNode = new FieldInsnNode(GETFIELD, owner, field.name, field.desc);

        insnList = group.getInstructions();

        // insert the correct GETFIELD after the xLoad
        insnList.insert(insn, fieldNode);
        // change the load to ALOAD 0
        insnList.set(insn, new VarInsnNode(ALOAD, 0));
    }/*from   w  w  w  .  j  a  va  2  s .co m*/
}

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From source file:the.bytecode.club.bytecodeviewer.plugin.preinstalled.AllatoriStringDecrypter.java

License:Open Source License

private boolean scanDecrypter(MethodNode decryptermethodnode, int newHashCode) {
    InsnList iList = decryptermethodnode.instructions;

    AbstractInsnNode insn = null, removeInsn = null;
    for (AbstractInsnNode i : iList.toArray()) {
        if (i instanceof MethodInsnNode) {
            MethodInsnNode methodi = ((MethodInsnNode) i);
            if ("currentThread".equals(methodi.name)) { // find code form this instruction
                insn = i;//www.  j  a  v  a2 s  .  c o  m
                break;
            }

        }

    }
    if (insn == null) {
        return false;
    }

    while (insn != null) {
        if (insn instanceof MethodInsnNode) {
            MethodInsnNode methodi = ((MethodInsnNode) insn);
            if ("hashCode".equals(methodi.name)) { // to this instruction
                break;
            }
        }
        removeInsn = insn;
        insn = insn.getNext();
        iList.remove(removeInsn); // and remove it
    }
    if (insn == null)
        return false;
    iList.set(insn, new LdcInsnNode(newHashCode)); // then replace it with pre-computed key LDC
    return true;
}

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