public void executeInstruction(JVM vm) {
Instruction insn = vm.getLastInstruction();
MethodInfo mi = insn.getMethodInfo();
ThreadInfo ti = vm.getLastThreadInfo();
if (mi != lastMi) {
logStack(ti);
lastMi = mi;
} else if (insn instanceof InvokeInstruction) {
MethodInfo callee;
// that's the only little gist of it - if this is a VirtualInvocation,
// we have to dig the callee out by ourselves (it's not known
// before execution)
if (insn instanceof VirtualInvocation) {
VirtualInvocation callInsn = (VirtualInvocation) insn;
int objref = callInsn.getCalleeThis(ti);
callee = callInsn.getInvokedMethod(ti, objref);
} else if (insn instanceof INVOKESPECIAL) {
INVOKESPECIAL callInsn = (INVOKESPECIAL) insn;
callee = callInsn.getInvokedMethod(ti);
} else {
InvokeInstruction callInsn = (InvokeInstruction) insn;
callee = callInsn.getInvokedMethod(ti);
}
if (callee != null) {
if (callee.isMJI()) {
logStack(ti);
}
} else {
out.println("ERROR: unknown callee of: " + insn);
}
}
}
