/** 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;
}
}
/**
* Long output format:
*
* <p><position in byte code> <name of opcode> "["<opcode number>"]"
* "("<length of instruction>")" "<"<target instruction>">" "@"<branch target
* offset>
*
* @param verbose long/short format switch
* @return mnemonic for instruction
*/
public String toString(boolean verbose) {
String s = super.toString(verbose);
String t = "null";
if (verbose) {
if (target != null) {
if (target.getInstruction() == this) t = "<points to itself>";
else if (target.getInstruction() == null) t = "<null instruction!!!?>";
else t = target.getInstruction().toString(false); // Avoid circles
}
} else {
if (target != null) {
index = getTargetOffset();
t = "" + (index + position);
}
}
return s + " -> " + t;
}