在调用DestroyJavaVM之后,重新调用JNI_CreateJavaVM会返回-1 [英] Re-calling JNI_CreateJavaVM returns -1 after calling DestroyJavaVM
问题描述
我试图在调用DestroyJavaVM之后回忆起JNI_CreateJavaVM。
I am trying to recall JNI_CreateJavaVM after calling DestroyJavaVM.
我按以下顺序调用它们:InitJVM - > ReleaseJVM - > InitJVM
I call them in following order: InitJVM -> ReleaseJVM -> InitJVM
首次初始化时,JNI_CreateJavaVM返回0并正常工作。
第二次在销毁后初始化时,JNI_CreateJavaVM返回-1并且不起作用。
First time when initialing, JNI_CreateJavaVM returns 0 and works fine. second time when initialing after destroying, JNI_CreateJavaVM return -1 and does not work.
会出现什么问题?
这是一个创建JVM的函数:
Here is a function that create JVM:
#elif __linux
HRESULT PWNJava::InitJVM(void) {
if(m_bRunning) {
Log("Error : JVM is already Running! (PWNJava::Init)");
return PWN_FAIL;
}
const int kNumOptions = 3;
JavaVMOption options[kNumOptions] = {
{ const_cast<char*> ("-Xmx128m"), NULL},
{ const_cast<char*> ("-verbose:gc"), NULL},
{ const_cast<char*> ("-Djava.class.path=../../Class"), NULL}
};
JavaVMInitArgs vm_args;
vm_args.version = JNI_VERSION_1_6;
vm_args.options = options;
vm_args.nOptions = sizeof (options) / sizeof (JavaVMOption);
assert(vm_args.nOptions == kNumOptions);
int res = JNI_CreateJavaVM(&jvm, reinterpret_cast<void**> (&env), &vm_args);
if (res != JNI_OK) {
Log("Error : createJavaVM(&jvm, &env, &vm_args)");
return PWN_FAIL;
}
m_bRunning = true;
Log("Success : PWNJava::Init");
return PWN_OK;
}
#endif
这是一个删除JVM的函数:
Here is a function deleting JVM:
void PWNJava::ReleaseJVM(void) {
if (jvm)
jvm->DestroyJavaVM();
jvm = NULL;
delete jvm;
env = NULL;
delete env;
m_bRunning = false;
Log("Success : PWNJava::ReleaseJVM");
}
推荐答案
上次我看了 JNI_DestroyJVM()
,它说但JDK / JRE仍然不支持VM卸载。只是不要调用它,也不要重新初始化它。
Last time I looked at JNI_DestroyJVM()
, it said "The JDK/JRE still does not support VM unloading, however." Just don't call it, and don't re-initialize it either.
这篇关于在调用DestroyJavaVM之后,重新调用JNI_CreateJavaVM会返回-1的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!