On 3/08/2018 10:49 PM, mr rupplin wrote:
How would I subscribe to core-libs-dev?
The same way you subscribed to build-dev. ??? http://mail.openjdk.java.net/mailman/listinfo/core-libs-dev David
Ok. ------------------------------------------------------------------------ *From:* David Holmes <david.hol...@oracle.com> *Sent:* Thursday, August 2, 2018 11:55 PM *To:* mr rupplin; build-dev@openjdk.java.net *Subject:* Re: JNI Native - System (java.lang.System) Hi Max, The build-dev list is for discussing the OpenJDK build system. You appear to running into issues customizing parts of OpenJDK for your own use. It would be more appropriate to ask on core-libs-dev how to extend the System class - though examination of the existing native methods in System.java and System.c should show how it is done. There is not enough information in your post to see where you may have a made an error or omission. Cheers, David On 3/08/2018 12:53 PM, mr rupplin wrote:Hello. Trying to run a simple JNI call and I keep getting the following: SecureJVM : GNU Public License 2.0 Program Name >> java Launcher Name >> openjdk Windows >> off Version >> 9-internal+0-adhoc.mearvk.jdk9 A new instance of Hope is born. Exception in thread "main" java.lang.UnsatisfiedLinkError: java.lang.System.setMemoryAllocationListener0(Ljava/lang/memory/MemoryAllocationListener;)V at java.base/java.lang.System.setMemoryAllocationListener0(Native Method) at java.base/java.lang.System.setMemoryAllocationListener(System.java:261) at Hope.<init>(Hope.java:19) The source looks like: public static void setMemoryAllocationListener(MemoryAllocationListener memoryAllocationListener) { checkMalloc(); setMemoryAllocationListener0(memoryAllocationListener); } The C source looks like: JNIEXPORT void JNICALL Java_java_lang_System_setMemoryAllocationListener0(JNIEnv *env, jclass cla, jobject listener) { printf("setMemoryAllocationListener called:\n"); jfieldID fid = (*env)->GetStaticFieldID(env,cla,"memoryAllocationListener","Ljava/lang/memory/MemoryAllocationListener;"); printf("\t >> Lookup of MemoryAllocationListener completed"); if (fid == 0) return; (*env)->SetStaticObjectField(env,cla,fid,listener); printf("\t >> SetStaticObjectField completed"); } I am unable to discern the problem. The make runs clean as does a non-native call that instantiates a MemoryAllocationListener object. Can you guys spot the issue? Thanks, Max R. Sr. Software Tech
