Merge pull request #19874 from thallium/v0.47.0-release

(0.47) Destroy virtual thread data after VirtualThreadEnd callback

Author: babsingh

runtime/include/ibmjvmti.h

@@ -105,6 +105,7 @@
 
 #define COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT "com.sun.hotspot.events.VirtualThreadMount"
 #define COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT "com.sun.hotspot.events.VirtualThreadUnmount"
+#define COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY "com.sun.hotspot.events.VirtualThreadDestroy"
 
 #define OPENJ9_EVENT_VM_CHECKPOINT "openj9.event.VMCheckpoint"
 #define OPENJ9_EVENT_VM_RESTORE "openj9.event.VMRestore"

runtime/j9vm/javanextvmi.cpp

@@ -724,6 +724,7 @@ JVM_VirtualThreadEnd(JNIEnv *env, jobject vthread)
 	TRIGGER_J9HOOK_VM_VIRTUAL_THREAD_END(vm->hookInterface, currentThread);
 	setContinuationStateToLastUnmount((J9VMThread *)env, vthread);
 	virtualThreadUnmountBegin(env, vthread);
+	TRIGGER_J9HOOK_VM_VIRTUAL_THREAD_DESTROY(vm->hookInterface, currentThread);
 
 	vmFuncs->internalExitVMToJNI(currentThread);
 

runtime/jvmti/jvmtiExtensionMechanism.c

@@ -366,6 +366,12 @@ static const jvmtiParamInfo jvmtiVirtualThreadUnmount_params[] = {
 	{ "jni_env", JVMTI_KIND_IN_PTR, JVMTI_TYPE_JNIENV, JNI_FALSE },
 	{ "thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE }
 };
+
+/* (jvmtiEnv *jvmti_env, jthread thread) */
+static const jvmtiParamInfo jvmtiVirtualThreadDestroy_params[] = {
+	{ "jni_env", JVMTI_KIND_IN_PTR, JVMTI_TYPE_JNIENV, JNI_FALSE },
+	{ "thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE }
+};
 #endif /* JAVA_SPEC_VERSION >= 19 */
 
 #if JAVA_SPEC_VERSION >= 19
@@ -906,6 +912,12 @@ static const J9JVMTIExtensionEventInfo J9JVMTIExtensionEventInfoTable[] = {
 		J9NLS_JVMTI_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT,
 		SIZE_AND_TABLE(jvmtiVirtualThreadUnmount_params),
 	},
+	{
+		J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY,
+		COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY,
+		J9NLS_JVMTI_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY,
+		SIZE_AND_TABLE(jvmtiVirtualThreadDestroy_params),
+	},
 #endif /* JAVA_SPEC_VERSION >= 19 */
 #if defined(J9VM_OPT_CRIU_SUPPORT)
 	{

runtime/jvmti/jvmtiHelpers.cpp

@@ -85,6 +85,7 @@ static const UDATA reasonCodeFromJVMTIEvent[] = {
 	J9_JNI_OFFLOAD_SWITCH_J9JVMTI_GC_CYCLE_FINISH,						/* J9JVMTI_EVENT_COM_IBM_GARBAGE_COLLECTION_CYCLE_FINISH */
 	J9_JNI_OFFLOAD_SWITCH_J9JVMTI_VIRTUAL_THREAD_MOUNT,					/* J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT */
 	J9_JNI_OFFLOAD_SWITCH_J9JVMTI_VIRTUAL_THREAD_UNMOUNT,				/* J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT */
+	J9_JNI_OFFLOAD_SWITCH_J9JVMTI_VIRTUAL_THREAD_DESTROY,				/* J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY */
 	J9_JNI_OFFLOAD_SWITCH_J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT,			/* J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT */
 	J9_JNI_OFFLOAD_SWITCH_J9JVMTI_EVENT_OPENJ9_VM_RESTORE,				/* J9JVMTI_EVENT_OPENJ9_VM_RESTORE */
 };

runtime/jvmti/jvmtiHook.c

@@ -968,7 +968,7 @@ unhookAllEvents(J9JVMTIEnv * j9env)
 
 	hookUnregister(vmHook, J9HOOK_VM_THREAD_DESTROY, jvmtiHookThreadDestroy, NULL, j9env);
 #if JAVA_SPEC_VERSION >= 19
-	hookUnregister(vmHook, J9HOOK_VM_VIRTUAL_THREAD_END, jvmtiHookVirtualThreadDestroy, NULL, j9env);
+	hookUnregister(vmHook, J9HOOK_VM_VIRTUAL_THREAD_DESTROY, jvmtiHookVirtualThreadDestroy, NULL, j9env);
 #endif /* JAVA_SPEC_VERSION >= 19 */
 	hookUnregister(vmHook, J9HOOK_VM_POP_FRAMES_INTERRUPT, jvmtiHookPopFramesInterrupt, NULL, j9env);
 
@@ -987,7 +987,7 @@ hookRequiredEvents(J9JVMTIEnv * j9env)
 	}
 
 #if JAVA_SPEC_VERSION >= 19
-	if (hookRegister(vmHook, J9HOOK_VM_VIRTUAL_THREAD_END, jvmtiHookVirtualThreadDestroy, OMR_GET_CALLSITE(), j9env)) {
+	if (hookRegister(vmHook, J9HOOK_VM_VIRTUAL_THREAD_DESTROY, jvmtiHookVirtualThreadDestroy, OMR_GET_CALLSITE(), j9env)) {
 		return 1;
 	}
 #endif /* JAVA_SPEC_VERSION >= 19 */

runtime/nls/j9ti/jvmti.nls

@@ -666,3 +666,10 @@ J9NLS_J9JVMTI_OPENJ9_FUNCTION_REMOVE_DEBUG_THREAD.explanation=Remove a JDWP thre
 J9NLS_J9JVMTI_OPENJ9_FUNCTION_REMOVE_DEBUG_THREAD.system_action=None
 J9NLS_J9JVMTI_OPENJ9_FUNCTION_REMOVE_DEBUG_THREAD.user_response=None
 # END NON-TRANSLATABLE
+
+J9NLS_JVMTI_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY=Free native resources after a virtual thread ends.
+# START NON-TRANSLATABLE
+J9NLS_JVMTI_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY.explanation=Internationalized description of a JVMTI extension
+J9NLS_JVMTI_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY.system_action=None
+J9NLS_JVMTI_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY.user_response=None
+# END NON-TRANSLATABLE

runtime/oti/j9consts.h

@@ -795,7 +795,7 @@ extern "C" {
 #define J9_JNI_OFFLOAD_SWITCH_JVMTI_MONITOR_CONTENDED_ENTERED 0x30
 #define J9_JNI_OFFLOAD_SWITCH_J9JVMTI_VIRTUAL_THREAD_MOUNT 0x31
 #define J9_JNI_OFFLOAD_SWITCH_J9JVMTI_VIRTUAL_THREAD_UNMOUNT 0x32
-/* 0x33 Reserved for JVMTI event */
+#define J9_JNI_OFFLOAD_SWITCH_J9JVMTI_VIRTUAL_THREAD_DESTROY 0x33
 #define J9_JNI_OFFLOAD_SWITCH_JVMTI_RESOURCE_EXHAUSTED 0x34
 #define J9_JNI_OFFLOAD_SWITCH_JVMTI_GC_START 0x35
 #define J9_JNI_OFFLOAD_SWITCH_JVMTI_GC_FINISH 0x36

runtime/oti/j9vm.hdf

@@ -1383,6 +1383,16 @@ typedef UDATA (* lookupNativeAddressCallback)(struct J9VMThread *currentThread,
 		<data type="struct J9VMThread*" name="currentThread" description="current thread" />
 	</event>
 
+	<event>
+		<name>J9HOOK_VM_VIRTUAL_THREAD_DESTROY</name>
+		<description>
+			Triggered after J9HOOK_VM_VIRTUAL_THREAD_END to free native resources.
+			currentThread->threadObject is the virtual thread at the point of trigger.
+		</description>
+		<struct>J9VMVirtualThreadDestroyEvent</struct>
+		<data type="struct J9VMThread*" name="currentThread" description="current thread" />
+	</event>
+
 	<event>
 		<name>J9HOOK_VM_CRIU_CHECKPOINT</name>
 		<description>Triggered at the end of CRIU checkpoint, just before CRIU dump</description>

runtime/oti/jvmtiInternal.h

@@ -43,6 +43,7 @@ typedef enum {
 	J9JVMTI_EVENT_COM_IBM_GARBAGE_COLLECTION_CYCLE_FINISH,
 	J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT,
 	J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT,
+	J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_DESTROY,
 	J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT,
 	J9JVMTI_EVENT_OPENJ9_VM_RESTORE,
 	J9JVMTI_AFTER_LAST_EXTENSION_EVENT