/** Instrument the specified method to replace mapped calls. */ public void instrument_method(Method m, MethodGen mg) { // Loop through each instruction, making substitutions InstructionList il = mg.getInstructionList(); for (InstructionHandle ih = il.getStart(); ih != null; ) { if (debug_instrument_inst.enabled()) { debug_instrument_inst.log("instrumenting instruction %s%n", ih); // ih.getInstruction().toString(pool.getConstantPool())); } InstructionList new_il = null; // Remember the next instruction to process InstructionHandle next_ih = ih.getNext(); // Get the translation for this instruction (if any) new_il = xform_inst(mg, ih.getInstruction()); if (debug_instrument_inst.enabled()) debug_instrument_inst.log(" new inst: %s%n", new_il); // If this instruction was modified, replace it with the new // instruction list. If this instruction was the target of any // jumps or line numbers , replace them with the first // instruction in the new list replace_instructions(il, ih, new_il); ih = next_ih; } }
byte[] nullAdaptClass(final InputStream is, final String name) throws Exception { JavaClass jc = new ClassParser(is, name + ".class").parse(); ClassGen cg = new ClassGen(jc); String cName = cg.getClassName(); ConstantPoolGen cp = cg.getConstantPool(); Method[] ms = cg.getMethods(); for (int j = 0; j < ms.length; ++j) { MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp); boolean lv = ms[j].getLocalVariableTable() == null; boolean ln = ms[j].getLineNumberTable() == null; if (lv) { mg.removeLocalVariables(); } if (ln) { mg.removeLineNumbers(); } mg.stripAttributes(skipDebug); InstructionList il = mg.getInstructionList(); if (il != null) { InstructionHandle ih = il.getStart(); while (ih != null) { ih = ih.getNext(); } if (compute) { mg.setMaxStack(); mg.setMaxLocals(); } } cg.replaceMethod(ms[j], mg.getMethod()); } return cg.getJavaClass().getBytes(); }