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好吧,我正在尝试重新创建此方法:

    public int getBaseX() {
    return this.x + 10000;
}

它返回这些指令

0 aload_0
1 getfield #18 <TestClass.x>
4 sipush 10000
7 iadd
8 ireturn

现在我在使用 sipush 时遇到了麻烦,iadd。

            ClassGen injCG = cg;   
        ConstantPoolGen cpg = injCG.getConstantPool();
        InstructionList il = new InstructionList();
        MethodGen mg = new MethodGen(Constants.ACC_PUBLIC, f.getType(), Type.NO_ARGS, null,
                name, injCG.getClassName(), il, cpg);
        InstructionFactory instrF = new InstructionFactory(injCG, cpg);
        if (!f.isStatic()) il.append(new org.apache.bcel.generic.ALOAD(0));
        il.append(instrF.createFieldAccess(cg.getClassName(), f.getName(), f.getType(),
                (f.isStatic() ? Constants.GETSTATIC : Constants.GETFIELD)));
        il.append(InstructionFactory.createPop(1000));
        il.append(InstructionFactory.createReturn(f.getType()));
        //il.append(InstructionFactory.createReturn(f.getType()), InstructionFactory.createDup(1000));
        mg.setMaxLocals();
        mg.setMaxStack();
        injCG.addMethod(mg.getMethod());

这就是我尝试过的,但失败了。

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0 回答 0