使用wisp时，报NPE错误

[Thomas-Kong]

• 我已经在 issues 里搜索，没有重复的issue。
  在 wisp 的场景，执行 thread -n -1 会出错 #2342 这个错误修改不完全

环境信息

• Arthas 版本: 3.7.2

重现问题的步骤

1. thread -n 1

期望的结果

得到进程信息

实际运行的结果

Error during processing the command: java.lang.NullPointerException, message:null, please check $HOME/logs/arthas/arthas.log for more details.

把异常信息贴到这里

2024-07-22 15:03:08 [arthas-command-execute] ERROR c.t.a.c.s.system.impl.ProcessImpl -Error during processing the command:
java.lang.NullPointerException: null
	at com.taobao.arthas.core.util.ThreadUtil.getFullStacktrace(ThreadUtil.java:307)
	at com.taobao.arthas.core.command.view.ThreadView.draw(ThreadView.java:31)
	at com.taobao.arthas.core.command.view.ThreadView.draw(ThreadView.java:20)
	at com.taobao.arthas.core.distribution.impl.TermResultDistributorImpl.appendResult(TermResultDistributorImpl.java:28)
	at com.taobao.arthas.core.shell.system.impl.ProcessImpl.appendResult(ProcessImpl.java:268)
	at com.taobao.arthas.core.shell.system.impl.ProcessImpl.access$2100(ProcessImpl.java:38)
	at com.taobao.arthas.core.shell.system.impl.ProcessImpl$CommandProcessImpl.appendResult(ProcessImpl.java:620)
	at com.taobao.arthas.core.command.monitor200.ThreadCommand.processTopBusyThreads(ThreadCommand.java:218)
	at com.taobao.arthas.core.command.monitor200.ThreadCommand.process(ThreadCommand.java:122)
	at com.taobao.arthas.core.shell.command.impl.AnnotatedCommandImpl.process(AnnotatedCommandImpl.java:82)
	at com.taobao.arthas.core.shell.command.impl.AnnotatedCommandImpl.access$100(AnnotatedCommandImpl.java:18)
	at com.taobao.arthas.core.shell.command.impl.AnnotatedCommandImpl$ProcessHandler.handle(AnnotatedCommandImpl.java:111)
	at com.taobao.arthas.core.shell.command.impl.AnnotatedCommandImpl$ProcessHandler.handle(AnnotatedCommandImpl.java:108)
	at com.taobao.arthas.core.shell.system.impl.ProcessImpl$CommandProcessTask.run(ProcessImpl.java:385)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:855)
	at com.alibaba.wisp.engine.WispTask.runOutsideWisp(WispTask.java:299)
	at com.alibaba.wisp.engine.WispTask.runCommand(WispTask.java:274)
	at com.alibaba.wisp.engine.WispTask.access$100(WispTask.java:53)
	at com.alibaba.wisp.engine.WispTask$CacheableCoroutine.run(WispTask.java:241)
	at java.dyn.CoroutineBase.startInternal(CoroutineBase.java:62)

ThreadUtil.getFullStacktrace方法，没有对参数中的BusyThreadInfo中为null的信息做判断，导致NPE

public static String getFullStacktrace(BusyThreadInfo threadInfo, int lockIdentityHashCode, int blockingThreadCount) {
        StringBuilder sb = new StringBuilder("\"" + threadInfo.getName() + "\"");
        if (threadInfo.getId() > 0) {
            sb.append(" Id=").append(threadInfo.getId());
        } else {
            sb.append(" [Internal]");
        }
        double cpuUsage = threadInfo.getCpu();
        if (cpuUsage >= 0 && cpuUsage <= 100) {
            sb.append(" cpuUsage=").append(cpuUsage).append("%");
        }
        if (threadInfo.getDeltaTime() >= 0 ) {
            sb.append(" deltaTime=").append(threadInfo.getDeltaTime()).append("ms");
        }
        if (threadInfo.getTime() >= 0 ) {
            sb.append(" time=").append(threadInfo.getTime()).append("ms");
        }

        if (threadInfo.getState() == null) {
            sb.append("\n\n");
            return sb.toString();
        }

        sb.append(" ").append(threadInfo.getState());

        if (threadInfo.getLockName() != null) {
            sb.append(" on ").append(threadInfo.getLockName());
        }
        if (threadInfo.getLockOwnerName() != null) {
            sb.append(" owned by \"").append(threadInfo.getLockOwnerName()).append("\" Id=").append(threadInfo.getLockOwnerId());
        }
        if (threadInfo.isSuspended()) {
            sb.append(" (suspended)");
        }
        if (threadInfo.isInNative()) {
            sb.append(" (in native)");
        }
        sb.append('\n');
        int i = 0;
        for (; i < threadInfo.getStackTrace().length; i++) {
            StackTraceElement ste = threadInfo.getStackTrace()[i];
            sb.append("\tat ").append(ste.toString());
            sb.append('\n');
            if (i == 0 && threadInfo.getLockInfo() != null) {
                Thread.State ts = threadInfo.getState();
                switch (ts) {
                    case BLOCKED:
                        sb.append("\t-  blocked on ").append(threadInfo.getLockInfo());
                        sb.append('\n');
                        break;
                    case WAITING:
                        sb.append("\t-  waiting on ").append(threadInfo.getLockInfo());
                        sb.append('\n');
                        break;
                    case TIMED_WAITING:
                        sb.append("\t-  waiting on ").append(threadInfo.getLockInfo());
                        sb.append('\n');
                        break;
                    default:
                }
            }

            for (MonitorInfo mi : threadInfo.getLockedMonitors()) {
                if (mi.getLockedStackDepth() == i) {
                    sb.append("\t-  locked ").append(mi);
                    if (mi.getIdentityHashCode() == lockIdentityHashCode) {
                        Ansi highlighted = Ansi.ansi().fg(Ansi.Color.RED);
                        highlighted.a(" <---- but blocks ").a(blockingThreadCount).a(" other threads!");
                        sb.append(highlighted.reset().toString());
                    }
                    sb.append('\n');
                }
            }
        }
        if (i < threadInfo.getStackTrace().length) {
            sb.append("\t...");
            sb.append('\n');
        }

        LockInfo[] locks = threadInfo.getLockedSynchronizers();
        if (locks.length > 0) {
            sb.append("\n\tNumber of locked synchronizers = ").append(locks.length);
            sb.append('\n');
            for (LockInfo li : locks) {
                sb.append("\t- ").append(li);
                if (li.getIdentityHashCode() == lockIdentityHashCode) {
                    sb.append(" <---- but blocks ").append(blockingThreadCount);
                    sb.append(" other threads!");
                }
                sb.append('\n');
            }
        }
        sb.append('\n');
        return sb.toString().replace("\t", "    ");
    }

[hengyunabc]

欢迎提个pr上来～