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JNI内存泄露JNI ERROR (app bug): local reference table overflow (max=512)
原因是没即时释放对象，原本的代码是这样
static jobject getMaps(JNIEnv *env,jclass obj)
{
jclass stringbuilder_class = (*env)->FindClass(env,"java/lang/StringBuilder");
jmethodID init_stringbuilder_Method = (*env)->GetMethodID(env,stringbuilder_class,"<init>","()V");
jobject stringbuilder_obj=(*env)->NewObject(env,stringbuilder_class,init_stringbuilder_Method);
jmethodID append_Method = (*env)->GetMethodID(env,stringbuilder_class,"append","(Ljava/lang/Object;)Ljava/lang/StringBuilder;");
FILE * fileP;
char item[200]="ii";
fileP = fopen( "/proc/self/maps","r");
if(!fileP)
return stringbuilder_obj;
while(fgets(item,sizeof(item),fileP)!=NULL)
{
jstring str = (*env)->NewStringUTF(env,item);
(*env)->CallObjectMethod(env,stringbuilder_obj,append_Method,str);
(*env)->ReleaseStringUTFChars(env,str,item);
(*env)->DeleteLocalRef(env,str);
}
return stringbuilder_obj;
}
直接看去好像没什么问题，但是每调用一次 (*env)->CallObjectMethod(env,stringbuilder_obj,append_Method,str)
;都会产生个对象，我一开始以为这样没事，改成这样程序就不崩了
static jobject getMaps(JNIEnv *env,jclass obj)
{
jclass stringbuilder_class = (*env)->FindClass(env,"java/lang/StringBuilder");
jmethodID init_stringbuilder_Method = (*env)->GetMethodID(env,stringbuilder_class,"<init>","()V");
jobject stringbuilder_obj=(*env)->NewObject(env,stringbuilder_class,init_stringbuilder_Method);
jmethodID append_Method = (*env)->GetMethodID(env,stringbuilder_class,"append","(Ljava/lang/Object;)Ljava/lang/StringBuilder;");
FILE * fileP;
char item[200]="ii";
fileP = fopen( "/proc/self/maps","r");
if(!fileP)
return stringbuilder_obj;
while(fgets(item,sizeof(item),fileP)!=NULL)
{
jstring str = (*env)->NewStringUTF(env,item);
//加个temp用来释放
jobject temp=(*env)->CallObjectMethod(env,stringbuilder_obj,append_Method,str);
(*env)->ReleaseStringUTFChars(env,str,item);
(*env)->DeleteLocalRef(env,str);
(*env)->DeleteLocalRef(env,temp);
}
return stringbuilder_obj;
}
JNI内存泄露JNI ERROR (app bug): local reference table overflow (max=512)
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