void JNICALL RequestManager::HandleClassUnload()

in modules/jpda/src/main/native/jdwp/common/agent/core/RequestManager.cpp [1091:1160]

• 62 lines of code
• 8 McCabe index (conditional complexity)

void JNICALL RequestManager::HandleClassUnload(jvmtiEnv* jvmti, JNIEnv* jni,
        jthread thread, jclass cls)
{
    JDWP_TRACE_ENTRY("HandleClassUnload(" << jvmti << ',' << jni << ',' << thread << ',' << cls << ')');
    
    try {
        jvmtiError err;
        EventInfo eInfo;
        memset(&eInfo, 0, sizeof(eInfo));
        eInfo.kind = JDWP_EVENT_CLASS_UNLOAD;
        eInfo.thread = thread;
        eInfo.cls = cls;

        JVMTI_TRACE(err, GetJvmtiEnv()->GetClassSignature(eInfo.cls,
            &eInfo.signature, 0));
        JvmtiAutoFree jafSignature(eInfo.signature);
        if (err != JVMTI_ERROR_NONE) {
            throw AgentException(err);
        }

#ifndef NDEBUG
        if (JDWP_TRACE_ENABLED(LOG_KIND_EVENT)) {
            jvmtiThreadInfo info;
            JVMTI_TRACE(err, GetJvmtiEnv()->GetThreadInfo(thread, &info));

            JDWP_TRACE_EVENT("CLASS_UNLOAD event:"
                << " class=" << JDWP_CHECK_NULL(eInfo.signature)
                << " thread=" << JDWP_CHECK_NULL(info.name));
        }
#endif // NDEBUG

        jint eventCount = 0;
        RequestID *eventList = 0;
        jdwpSuspendPolicy sp = JDWP_SUSPEND_NONE;
        GetRequestManager().GenerateEvents(jni, eInfo, eventCount, eventList, sp);
        AgentAutoFree aafEL(eventList JDWP_FILE_LINE);

        bool isAgent = GetThreadManager().IsAgentThread(jni, thread);
        if (isAgent) {
            eInfo.thread = 0;
            sp = JDWP_SUSPEND_NONE;
        }

        // post generated events
        if (eventCount > 0) {
            jdwpTypeTag typeTag = GetClassManager().GetJdwpTypeTag(cls);
            jint status = 0;
            JVMTI_TRACE(err, GetJvmtiEnv()->GetClassStatus(cls, &status));
            if (err != JVMTI_ERROR_NONE) {
                throw AgentException(err);
            }
            EventComposer *ec = new EventComposer(GetEventDispatcher().NewId(),
                JDWP_COMMAND_SET_EVENT, JDWP_COMMAND_E_COMPOSITE, sp);
            ec->event.WriteInt(eventCount);
            for (jint i = 0; i < eventCount; i++) {
                ec->event.WriteByte(JDWP_EVENT_CLASS_UNLOAD);
                ec->event.WriteInt(eventList[i]);
                ec->WriteThread(jni, thread);
                ec->event.WriteByte(typeTag);
                ec->event.WriteReferenceTypeID(jni, cls);
                ec->event.WriteString(eInfo.signature);
                ec->event.WriteInt(status);
            }
            JDWP_TRACE_EVENT("HandleClassUnload: post set of " << eventCount << " events");
            GetEventDispatcher().PostEventSet(jni, ec, JDWP_EVENT_CLASS_UNLOAD);
        }
    } catch (AgentException& e) {
        JDWP_INFO("JDWP error in CLASS_UNLOAD: " << e.what() << " [" << e.ErrCode() << "]");
    }
}