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希望你做得很好。JVM崩潰attachCurrentThread JNI回調調用
我在C中有一個JNI實現，其中一個C函數附加到當前的JVM線程並回調一個Java方法，這實際上是在attachCurrentThread（）函數調用時崩潰JVM。 我的實現基於鏈接中給出的答案Keeping a global reference to the JNIEnv environment
線程創建部分將偵聽套接字連接以接受事件並注入GetEvent函數。
// create thread for reading from socket.
pthread_attr_init(&plafParams->readThreadAttr);
pthread_attr_setdetachstate(&plafParams->readThreadAttr, PTHREAD_CREATE_JOINABLE);
pthread_attr_setstacksize(&plafParams->readThreadAttr, 16384);
plafParams->eventThreadFlag = 2;
if(pthread_create(&plafParams->hReadThread_p, &plafParams->readThreadAttr, (void *) plafIncomingPortReadThread, (void *) dlmsInstance))
{
plafFree(plafParams);
return FAILURE;
}
//create thread to read from platform (to monitor wrapperRecv() process)
pthread_attr_init(&plafParams->EventthreadAttr);
pthread_attr_setdetachstate(&plafParams->EventthreadAttr, PTHREAD_CREATE_JOINABLE);
pthread_attr_setstacksize(&plafParams->EventthreadAttr, 16384);
if(pthread_create(&plafParams->EventThreadHandle_p, &plafParams->EventthreadAttr, (void *) IncomingPortEventReadHandling, (void *) dlmsInstance))
{
pthread_attr_destroy(&plafParams->readThreadAttr);
plafParams->eventThreadFlag = 0;
return FAILURE;
}
static JavaVM *jvm;
// Caching the JVM on JVM OnLoad
jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
JNIEnv* jenv;
version = (*vm)->GetEnv(vm, (void **) &jenv, JNI_VERSION_1_6);
jvm = vm;
printf("\n jvm = %d \n",rs);
if(rs == JNI_OK) {
printf("\n JNI_OK \n");
}
}
回調函數
void GetEvent(unsigned char *msg)
{
printf("\n Processing event data \n");
JNIEnv *env;
printf("\n Before attaching JVM thread \n");
jint rs = (*jvm)->AttachCurrentThread(jvm, &env, NULL); // JVM crashes here, tried with jint rs = (*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL), nothing helps
printf("\n After attaching JVM thread \n");
}
在GetEvent的執行（）在接收到的事件時，我的AttachCurrentThread JVM崩潰（）函數調用。 有人能幫我找出問題嗎？ 在此先感謝和任何建議將不勝感激。
問候，
Saravanan摹
更多信息需要有搞清楚什麼地方出了錯的希望。在附註中，'jint rs =（* jenv） - > GetJavaVM（jenv，&jvm);''不需要，您可以使用爲您提供的'JavaVM * vm'指針onload。EX：'jvm = vm;' – 2014-10-31 16:58:02
謝謝亞歷克斯。我已經刪除了用jvm = vm替換的GetJavaVM（）函數 – srvnn 2014-11-01 09:36:52