import sun.jvm.hotspot.runtime.JavaVFrame; //导入依赖的package包/类
public void doit(Tokens t) {
    if (t.countTokens() != 0) {
        usage();
    } else {
        ArrayList nmethods = new ArrayList();
        Threads threads = VM.getVM().getThreads();
        HTMLGenerator gen = new HTMLGenerator(false);
        for (JavaThread thread = threads.first(); thread != null; thread = thread.next()) {
            try {
                for (JavaVFrame vf = thread.getLastJavaVFrameDbg(); vf != null; vf = vf.javaSender()) {
                    if (vf instanceof CompiledVFrame) {
                        NMethod c = ((CompiledVFrame)vf).getCode();
                        if (!nmethods.contains(c)) {
                            nmethods.add(c);
                            out.println(gen.genHTML(c));
                        }
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
 

import sun.jvm.hotspot.runtime.JavaVFrame; //导入依赖的package包/类
StackFrameImpl(VirtualMachine vm, ThreadReferenceImpl thread,
               JavaVFrame jvf) {
    super(vm);
    this.thread = thread;
    this.saFrame = jvf;

    sun.jvm.hotspot.oops.Method SAMethod = jvf.getMethod();

    ReferenceType rt = ((VirtualMachineImpl)vm).referenceType(SAMethod.getMethodHolder());

    this.location = new LocationImpl(vm, rt, SAMethod, (long)jvf.getBCI());
}
 

import sun.jvm.hotspot.runtime.JavaVFrame; //导入依赖的package包/类
JavaVFrame getJavaVFrame() {
    return saFrame;
}