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jvmtiHook.c
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/*******************************************************************************
* Copyright IBM Corp. and others 1991
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] https://openjdk.org/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
*******************************************************************************/
#include "jvmtiHelpers.h"
#include "jvmti_internal.h"
#include "j2sever.h"
typedef IDATA (*J9HookRedirectorFunction)(J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData);
#define ENSURE_EVENT_PHASE_PRIMORDIAL_START_OR_LIVE(func, env) \
do { \
UDATA phase = J9JVMTI_PHASE(env); \
if ((phase != JVMTI_PHASE_LIVE) && (phase != JVMTI_PHASE_START) && (phase != JVMTI_PHASE_PRIMORDIAL)) { \
TRACE_JVMTI_EVENT_RETURN(func); \
} \
} while(0)
#define ENSURE_EVENT_PHASE_START_OR_LIVE(func, env) \
do { \
UDATA phase = J9JVMTI_PHASE(env); \
if ((phase != JVMTI_PHASE_LIVE) && (phase != JVMTI_PHASE_START)) { \
TRACE_JVMTI_EVENT_RETURN(func); \
} \
} while(0)
#define ENSURE_EVENT_PHASE_LIVE(func, env) \
if (J9JVMTI_PHASE(env) != JVMTI_PHASE_LIVE) { \
TRACE_JVMTI_EVENT_RETURN(func); \
}
#define TRACE_JVMTI_EVENT_RETURN(func) TRACE2_JVMTI_EVENT_RETURN(func)
#define TRACE2_JVMTI_EVENT_RETURN(func) \
do { \
Trc_JVMTI_##func##_Exit(); \
return; \
} while(0)
static void jvmtiHookPermanentPC (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookThreadDestroy (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookGCEnd (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookGCCycleEnd(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookClassPrepare (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static IDATA processEvent (J9JVMTIEnv* j9env, jint event, J9HookRedirectorFunction redirectorFunction);
static void jvmtiHookMonitorContendedEntered (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookMonitorWait (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if (defined(J9VM_GC_DYNAMIC_CLASS_UNLOADING))
static void removeUnloadedFieldWatches (J9JVMTIEnv * j9env, J9Class * unloadedClass);
#endif /* J9VM_GC_DYNAMIC_CLASS_UNLOADING */
#if (defined(J9VM_GC_DYNAMIC_CLASS_UNLOADING))
static void jvmtiHookClassUnload (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* J9VM_GC_DYNAMIC_CLASS_UNLOADING */
static IDATA hookRegister (J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData);
static void jvmtiHookExceptionCatch (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookExceptionThrow (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
static void jvmtiHookCompilingEnd (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* INTERP_NATIVE_SUPPORT */
static void jvmtiHookClassLoad (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVMInitializedFirst (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVMInitialized (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVMShutdownLast (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVMShutdown (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookSingleStep (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookGCStart (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookGCCycleStart(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if (defined(J9VM_JIT_FULL_SPEED_DEBUG))
static void jvmtiHookCheckForDataBreakpoint (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* J9VM_JIT_FULL_SPEED_DEBUG */
static void jvmtiHookFramePop (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookFieldModification (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
static void jvmtiHookDynamicCodeUnload (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* INTERP_NATIVE_SUPPORT */
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
static void jvmtiHookDynamicCodeLoad (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* INTERP_NATIVE_SUPPORT */
static void jvmtiHookMethodExit (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiFreeClassData (void * userData, void * address);
static void jvmtiHookPopFramesInterrupt (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static IDATA hookReserve (J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData);
static void jvmtiHookUserInterrupt (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookLookupNativeAddress (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static UDATA lookupNativeAddressHelper(J9VMThread *currentThread, J9JVMTIData * jvmtiData, J9Method * nativeMethod, UDATA prefixOffset, UDATA retransformFlag, UDATA functionArgCount, lookupNativeAddressCallback callback);
static void jvmtiHookFindNativeToRegister (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static UDATA removeMethodPrefixesHelper(J9JVMTIData * jvmtiData, U_8 * methodName, UDATA methodPrefixSize, UDATA prefixOffset, UDATA retransformFlag);
static void jvmtiHookMonitorWaited (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookMonitorContendedEnter (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
static void jvmtiHookCompilingStart (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* INTERP_NATIVE_SUPPORT */
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
static void stopCompileEventThread (J9JVMTIData * jvmtiData);
#endif /* INTERP_NATIVE_SUPPORT */
#if (defined(J9VM_GC_DYNAMIC_CLASS_UNLOADING))
static void removeUnloadedAgentBreakpoints (J9JVMTIEnv * j9env, J9VMThread * currentThread, J9Class * unloadedClass);
#endif /* J9VM_GC_DYNAMIC_CLASS_UNLOADING */
static IDATA hookUnregister (J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData);
static void jvmtiHookBreakpoint (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookRequiredDebugAttributes (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookJNINativeBind (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static IDATA hookIsDisabled (J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData);
static void jvmtiHookMethodEnter (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if defined(J9VM_INTERP_NATIVE_SUPPORT)
static int J9THREAD_PROC compileEventThreadProc (void *entryArg);
#endif /* INTERP_NATIVE_SUPPORT */
#if JAVA_SPEC_VERSION >= 11
static void jvmtiHookSampledObjectAlloc (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* JAVA_SPEC_VERSION >= 11 */
static void jvmtiHookObjectAllocate (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookThreadEnd (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookFindMethodFromPC (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookThreadStarted (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookFieldAccess (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVMStartedFirst (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVMStarted (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#if JAVA_SPEC_VERSION >= 9
static void jvmtiHookModuleSystemStarted (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* JAVA_SPEC_VERSION >= 9 */
static void jvmtiHookClassFileLoadHook (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookResourceExhausted(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static UDATA findFieldIndexFromOffset(J9VMThread *currentThread, J9Class *clazz, UDATA offset, UDATA isStatic, J9Class **declaringClass);
static jfieldID findWatchedField (J9VMThread *currentThread, J9JVMTIEnv * j9env, UDATA isWrite, UDATA isStatic, UDATA tag, J9Class * fieldClass);
static void jvmtiHookGetEnv (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVmDumpStart (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVmDumpEnd (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static UDATA methodExists(J9Class * methodClass, U_8 * nameData, UDATA nameLength, J9UTF8 * signature);
#if JAVA_SPEC_VERSION >= 19
static void jvmtiHookVirtualThreadStarted (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVirtualThreadEnd (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVirtualThreadDestroy (J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData);
static void jvmtiHookVirtualThreadMount (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
static void jvmtiHookVirtualThreadUnmount (J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData);
#endif /* JAVA_SPEC_VERSION >= 19 */
static BOOLEAN shouldPostEvent(J9VMThread *currentThread, J9Method *method);
#if defined(J9VM_OPT_CRIU_SUPPORT)
static void jvmtiHookVMCheckpoint(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData);
static void jvmtiHookVMRestore(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData);
static void hookDisableHelper(J9JavaVM *vm, J9HookInterface **vmHook, UDATA eventNum, J9HookFunction function, BOOLEAN unreserve, void *userData);
static void
hookDisableHelper(J9JavaVM *vm, J9HookInterface **vmHook, UDATA eventNum, J9HookFunction function, BOOLEAN unreserve, void *userData)
{
if (NULL == userData) {
(*vmHook)->J9HookUnregister(vmHook, eventNum, function, vm->checkpointState.jvmtienv);
} else {
(*vmHook)->J9HookUnregister(vmHook, eventNum, function, userData);
}
if (unreserve) {
/* for actual hookRegister calls */
(*vmHook)->J9HookUnreserve(vmHook, eventNum);
}
(*vmHook)->J9HookDisable(vmHook, eventNum);
}
#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
static void
jvmtiHookThreadEnd(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9VMThreadEndEvent * data = eventData;
J9JVMTIEnv * j9env = userData;
jvmtiEventThreadEnd callback = j9env->callbacks.ThreadEnd;
J9VMThread * currentThread = data->currentThread;
Trc_JVMTI_jvmtiHookThreadEnd_Entry();
ENSURE_EVENT_PHASE_START_OR_LIVE(jvmtiHookThreadEnd, j9env);
/* Call the event callback */
if (callback != NULL) {
jthread threadRef;
UDATA hadVMAccess;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(j9env, currentThread, currentThread, JVMTI_EVENT_THREAD_END, &threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *) j9env, (JNIEnv *) currentThread, threadRef);
finishedEvent(data->currentThread, JVMTI_EVENT_THREAD_END, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookThreadEnd);
}
static void
jvmtiHookThreadStarted(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9VMThreadStartedEvent * data = eventData;
J9JVMTIEnv * j9env = userData;
jvmtiEventThreadStart callback = j9env->callbacks.ThreadStart;
J9VMThread * currentThread = data->currentThread;
Trc_JVMTI_jvmtiHookThreadStarted_Entry();
ENSURE_EVENT_PHASE_START_OR_LIVE(jvmtiHookThreadStarted, j9env);
/* Call the event callback */
if (callback != NULL) {
jthread threadRef;
UDATA hadVMAccess;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(j9env, currentThread, data->vmThread, JVMTI_EVENT_THREAD_START, &threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *) j9env, (JNIEnv *) currentThread, threadRef);
finishedEvent(currentThread, JVMTI_EVENT_THREAD_START, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookThreadStarted);
}
/**
* Deallocates the thread data block for the given environment/thread pair. For JDK19+, it is located in
* the vmThread's thread object. For JDK18 and earlier, it is in the OS thread.
*
* @param[in] j9env the environment
* @param[in] vmThread the terminating vm thread
*/
static void
destroyThreadData(J9JVMTIEnv *j9env, J9VMThread *vmThread)
{
j9object_t threadObject = vmThread->threadObject;
if (NULL != threadObject) {
#if JAVA_SPEC_VERSION >= 19
void *tlsArray = J9OBJECT_ADDRESS_LOAD(vmThread, threadObject, vmThread->javaVM->tlsOffset);
if (NULL != tlsArray)
#endif /* JAVA_SPEC_VERSION >= 19 */
{
/* Deallocate the thread data block for this environment/thread pair, if it exists. */
J9JVMTIThreadData *threadData = jvmtiTLSGet(vmThread, threadObject, j9env->tlsKey);
if (NULL != threadData) {
jvmtiTLSSet(vmThread, threadObject, j9env->tlsKey, NULL);
omrthread_monitor_enter(j9env->threadDataPoolMutex);
pool_removeElement(j9env->threadDataPool, threadData);
omrthread_monitor_exit(j9env->threadDataPoolMutex);
}
}
}
}
static void
jvmtiHookThreadDestroy(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9VMThreadDestroyEvent * data = eventData;
J9JVMTIEnv * j9env = userData;
J9VMThread * vmThread = data->vmThread;
Trc_JVMTI_jvmtiHookThreadDestroy_Entry();
/* The final thread in the system is destroyed very late, JVMTI could be shut down by then. */
if (vmThread->javaVM->jvmtiData != NULL) {
destroyThreadData(j9env, vmThread);
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookThreadDestroy);
}
static void
jvmtiHookVMInitializedFirst(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9JVMTIData * jvmtiData = userData;
Trc_JVMTI_jvmtiHookVMInitializedFirst_Entry();
jvmtiData->phase = JVMTI_PHASE_LIVE;
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVMInitializedFirst);
}
static void
jvmtiHookVMInitialized(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9VMInitEvent * data = eventData;
J9JVMTIEnv * j9env = userData;
jvmtiEventVMInit callback = j9env->callbacks.VMInit;
Trc_JVMTI_jvmtiHookVMInitialized_Entry();
if (callback != NULL) {
J9VMThread * currentThread = data->vmThread;
jthread threadRef;
UDATA hadVMAccess;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(j9env, currentThread, currentThread, JVMTI_EVENT_VM_INIT, &threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *) j9env, (JNIEnv *) currentThread, threadRef);
finishedEvent(currentThread, JVMTI_EVENT_VM_INIT, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVMInitialized);
}
static void
jvmtiHookMethodEnter(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9JVMTIEnv * j9env = userData;
jvmtiEventMethodEntry callback = j9env->callbacks.MethodEntry;
Trc_JVMTI_jvmtiHookMethodEnter_Entry();
ENSURE_EVENT_PHASE_LIVE(jvmtiHookMethodEnter, j9env);
/* Call the event callback */
if (callback != NULL) {
J9VMThread * currentThread;
J9Method * method;
jthread threadRef;
UDATA hadVMAccess;
UDATA javaOffloadOldState = 0;
if (eventNum == J9HOOK_VM_NATIVE_METHOD_ENTER) {
J9VMNativeMethodEnterEvent * data = eventData;
currentThread = data->currentThread;
method = data->method;
} else {
J9VMMethodEnterEvent * data = eventData;
currentThread = data->currentThread;
method = data->method;
}
if (shouldPostEvent(currentThread, method)) {
if (prepareForEvent(j9env, currentThread, currentThread, JVMTI_EVENT_METHOD_ENTRY, &threadRef, &hadVMAccess, TRUE, 0, &javaOffloadOldState)) {
J9JavaVM * vm = currentThread->javaVM;
jmethodID methodID;
methodID = getCurrentMethodID(currentThread, method);
vm->internalVMFunctions->internalExitVMToJNI(currentThread);
if (methodID != NULL) {
if (callback != NULL) {
callback((jvmtiEnv *) j9env, (JNIEnv *) currentThread, threadRef, methodID);
}
}
finishedEvent(currentThread, JVMTI_EVENT_METHOD_ENTRY, hadVMAccess, javaOffloadOldState);
}
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookMethodEnter);
}
#if JAVA_SPEC_VERSION >= 19
static void
jvmtiHookVirtualThreadStarted(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9VirtualThreadStartedEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
jvmtiEventThreadStart callback = j9env->callbacks.VirtualThreadStart;
J9VMThread *currentThread = data->currentThread;
Trc_JVMTI_jvmtiHookVirtualThreadStarted_Entry();
ENSURE_EVENT_PHASE_START_OR_LIVE(jvmtiHookVirtualThreadStarted, j9env);
/* Call the event callback */
if (NULL != callback) {
jthread threadRef = NULL;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(
j9env, currentThread, currentThread, JVMTI_EVENT_VIRTUAL_THREAD_START,
&threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)
) {
callback((jvmtiEnv *)j9env, (JNIEnv *)currentThread, threadRef);
finishedEvent(currentThread, JVMTI_EVENT_VIRTUAL_THREAD_START, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVirtualThreadStarted);
}
static void
jvmtiHookVirtualThreadEnd(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9VirtualThreadEndEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
jvmtiEventThreadEnd callback = j9env->callbacks.VirtualThreadEnd;
J9VMThread *currentThread = data->currentThread;
Trc_JVMTI_jvmtiHookVirtualThreadEnd_Entry();
ENSURE_EVENT_PHASE_START_OR_LIVE(jvmtiHookVirtualThreadEnd, j9env);
/* Call the event callback */
if (NULL != callback) {
jthread threadRef = NULL;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(
j9env, currentThread, currentThread, JVMTI_EVENT_VIRTUAL_THREAD_END,
&threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)
) {
callback((jvmtiEnv *)j9env, (JNIEnv *)currentThread, threadRef);
finishedEvent(data->currentThread, JVMTI_EVENT_VIRTUAL_THREAD_END, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVirtualThreadEnd);
}
static void
jvmtiHookVirtualThreadDestroy(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9VirtualThreadEndEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
J9VMThread *currentThread = data->currentThread;
Trc_JVMTI_jvmtiHookVirtualThreadDestroy_Entry();
/* The final thread in the system is destroyed very late, JVMTI could be shut down by then. */
if (NULL != currentThread->javaVM->jvmtiData) {
destroyThreadData(j9env, currentThread);
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVirtualThreadDestroy);
}
/**
* Virtual thread mount event.
*
* @param hook Hook interface used by the JVM.
* @param eventNum The hook event number
* @param eventData hook specific event data.
* @param userData pointer to J9VMRuntimeStateListener
* @return void.
*/
static void
jvmtiHookVirtualThreadMount(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9VMVirtualThreadMountEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
J9VMThread *currentThread = data->currentThread;
jvmtiExtensionEvent callback = *J9JVMTI_EXTENSION_CALLBACK(j9env, J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT);
Trc_JVMTI_jvmtiHookVirtualThreadMount_Entry();
ENSURE_EVENT_PHASE_LIVE(jvmtiHookVirtualThreadMount, j9env);
/* Call the event callback */
if (NULL != callback) {
jthread threadRef = NULL;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(
j9env, currentThread, currentThread, J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT,
&threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)
) {
callback((jvmtiEnv *)j9env, (JNIEnv *)currentThread, threadRef);
finishedEvent(currentThread, J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVirtualThreadMount);
}
/**
* Virtual thread unmount event.
*
* @param hook Hook interface used by the JVM.
* @param eventNum The hook event number
* @param eventData hook specific event data.
* @param userData pointer to J9VMRuntimeStateListener
* @return void.
*/
static void
jvmtiHookVirtualThreadUnmount(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9VMVirtualThreadUnmountEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
jvmtiExtensionEvent callback = *J9JVMTI_EXTENSION_CALLBACK(j9env, J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT);
J9VMThread *currentThread = data->currentThread;
Trc_JVMTI_jvmtiHookVirtualThreadUnmount_Entry();
ENSURE_EVENT_PHASE_LIVE(jvmtiHookVirtualThreadUnmount, j9env);
/* Call the event callback */
if (NULL != callback) {
jthread threadRef = NULL;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(
j9env, currentThread, currentThread, J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT,
&threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)
) {
callback((jvmtiEnv *)j9env, (JNIEnv *)currentThread, threadRef);
finishedEvent(data->currentThread, J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVirtualThreadUnmount);
}
#endif /* JAVA_SPEC_VERSION >= 19 */
#if defined(J9VM_OPT_CRIU_SUPPORT)
static void
jvmtiHookVMCheckpoint(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9CheckpointEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
jvmtiExtensionEvent callback = *J9JVMTI_EXTENSION_CALLBACK(j9env, J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT);
Trc_JVMTI_jvmtiHookVMCheckpoint_Entry();
if (NULL != callback) {
J9VMThread *currentThread = data->currentThread;
jthread threadRef = NULL;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(j9env, currentThread, currentThread, J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT, &threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *)j9env, (JNIEnv *)currentThread, threadRef);
finishedEvent(currentThread, J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVMCheckpoint);
}
static void
jvmtiHookVMRestore(J9HookInterface **hook, UDATA eventNum, void *eventData, void *userData)
{
J9RestoreEvent *data = eventData;
J9JVMTIEnv *j9env = userData;
jvmtiExtensionEvent callback = *J9JVMTI_EXTENSION_CALLBACK(j9env, J9JVMTI_EVENT_OPENJ9_VM_RESTORE);
Trc_JVMTI_jvmtiHookVMRestore_Entry();
if (NULL != callback) {
J9VMThread *currentThread = data->currentThread;
jthread threadRef = NULL;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(j9env, currentThread, currentThread, J9JVMTI_EVENT_OPENJ9_VM_RESTORE, &threadRef, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *)j9env, (JNIEnv *)currentThread, threadRef);
finishedEvent(currentThread, J9JVMTI_EVENT_OPENJ9_VM_RESTORE, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVMRestore);
}
void
criuDisableHooks(J9JVMTIData *jvmtiData, J9JVMTIEnv *j9env)
{
J9JavaVM *vm = jvmtiData->vm;
jvmtiEnv *jvmti_env = vm->checkpointState.jvmtienv;
J9HookInterface **vmHook = vm->internalVMFunctions->getVMHookInterface(vm);
Assert_JVMTI_true(J9_ARE_NO_BITS_SET(vm->checkpointState.flags, J9VM_CRIU_IS_JDWP_ENABLED));
/* can_access_local_variables, can_get_source_file_name, can_get_line_numbers, can_get_source_debug_extension
* can_maintain_original_method_order, can_generate_single_step_events
*/
hookDisableHelper(vm, vmHook, J9HOOK_VM_REQUIRED_DEBUG_ATTRIBUTES, jvmtiHookRequiredDebugAttributes, FALSE, NULL);
vm->requiredDebugAttributes &= ~J9VM_DEBUG_ATTRIBUTE_CAN_ACCESS_LOCALS;
vm->requiredDebugAttributes &= ~J9VM_DEBUG_ATTRIBUTE_MAINTAIN_ORIGINAL_METHOD_ORDER;
vm->requiredDebugAttributes &= ~J9VM_DEBUG_ATTRIBUTE_SOURCE_DEBUG_EXTENSION;
if (NULL != vm->jitConfig) {
vm->requiredDebugAttributes &= ~J9VM_DEBUG_ATTRIBUTE_LINE_NUMBER_TABLE;
vm->requiredDebugAttributes &= ~J9VM_DEBUG_ATTRIBUTE_LOCAL_VARIABLE_TABLE;
vm->requiredDebugAttributes &= ~J9VM_DEBUG_ATTRIBUTE_SOURCE_FILE;
}
if (NULL != vm->jitConfig) {
J9VMHookInterface vmhookInterface = vm->hookInterface;
/* can_tag_objects */
hookDisableHelper(vm, vmHook, J9HOOK_MM_OMR_GLOBAL_GC_END, jvmtiHookGCEnd, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_MM_OMR_LOCAL_GC_END, jvmtiHookGCEnd, FALSE, NULL);
/* can_generate_single_step_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_SINGLE_STEP, jvmtiHookSingleStep, FALSE, NULL);
/* can_generate_exception_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_EXCEPTION_THROW, jvmtiHookExceptionThrow, TRUE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_EXCEPTION_CATCH, jvmtiHookExceptionCatch, TRUE, NULL);
/* can_generate_frame_pop_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_FRAME_POP, jvmtiHookFramePop, FALSE, NULL);
/* can_generate_breakpoint_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_BREAKPOINT, jvmtiHookBreakpoint, TRUE, NULL);
/* can_generate_method_entry_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_METHOD_ENTER, jvmtiHookMethodEnter, TRUE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_NATIVE_METHOD_ENTER, jvmtiHookMethodEnter, TRUE, NULL);
/* can_generate_method_exit_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_METHOD_RETURN, jvmtiHookMethodExit, TRUE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_NATIVE_METHOD_RETURN, jvmtiHookMethodExit, TRUE, NULL);
/* can_generate_monitor_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_MONITOR_CONTENDED_ENTER, jvmtiHookMonitorContendedEnter, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_MONITOR_CONTENDED_ENTERED, jvmtiHookMonitorContendedEntered, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_MONITOR_WAIT, jvmtiHookMonitorWait, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_MONITOR_WAITED, jvmtiHookMonitorWaited, FALSE, NULL);
/* can_generate_garbage_collection_events */
hookDisableHelper(vm, vmHook, J9HOOK_MM_OMR_GLOBAL_GC_START, jvmtiHookGCStart, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_MM_OMR_LOCAL_GC_START, jvmtiHookGCStart, FALSE, NULL);
#if JAVA_SPEC_VERSION >= 21
/* can_support_virtual_threads */
hookDisableHelper(vm, vmHook, J9HOOK_VM_VIRTUAL_THREAD_STARTED, jvmtiHookVirtualThreadStarted, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_VIRTUAL_THREAD_END, jvmtiHookVirtualThreadEnd, FALSE, NULL);
#endif /* JAVA_SPEC_VERSION >= 21 */
/* can_generate_field_modification_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_PUT_FIELD, jvmtiHookFieldModification, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_PUT_STATIC_FIELD, jvmtiHookFieldModification, FALSE, NULL);
/* can_generate_field_access_events */
hookDisableHelper(vm, vmHook, J9HOOK_VM_GET_FIELD, jvmtiHookFieldAccess, FALSE, NULL);
hookDisableHelper(vm, vmHook, J9HOOK_VM_GET_STATIC_FIELD, jvmtiHookFieldAccess, FALSE, NULL);
/* can_pop_frame & can_force_early_return */
if (J9_EVENT_IS_HOOKED_OR_RESERVED(vmhookInterface, J9HOOK_VM_POP_FRAMES_INTERRUPT)) {
hookDisableHelper(vm, vmHook, J9HOOK_VM_POP_FRAMES_INTERRUPT, jvmtiHookPopFramesInterrupt, TRUE, J9JVMTI_DATA_FROM_VM(vm));
}
}
(*jvmti_env)->RelinquishCapabilities(jvmti_env, &vm->checkpointState.requiredCapabilities);
}
#endif /* defined(J9VM_OPT_CRIU_SUPPORT)*/
static IDATA
hookRegister(J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void *userData)
{
J9HookInterface** hookInterface = hookInterfaceWithID->hookInterface;
return (*hookInterface)->J9HookRegisterWithCallSite(hookInterface, J9HOOK_TAG_AGENT_ID | eventNum, function, callsite, userData, hookInterfaceWithID->agentID);
}
/*
* parameter "callsite" has been added in hookReserve(), hookUnregister() and hookIsDisabled(), but it never been used in those functions
* it is just for matching hookRegister()(need callsite for hook tracepoint and hook java dump) in order to share code in processEvent().
*/
static IDATA
hookReserve(J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData)
{
J9HookInterface** hookInterface = hookInterfaceWithID->hookInterface;
return (*hookInterface)->J9HookReserve(hookInterface, eventNum);
}
static IDATA
hookUnregister(J9JVMTIHookInterfaceWithID* hookInterfaceWithID, UDATA eventNum, J9HookFunction function, const char *callsite, void* userData)
{
J9HookInterface** hookInterface = hookInterfaceWithID->hookInterface;
(*hookInterface)->J9HookUnregister(hookInterface, J9HOOK_TAG_COUNTED | eventNum, function, userData);
return 0;
}
static IDATA
processEvent(J9JVMTIEnv* j9env, jint event, J9HookRedirectorFunction redirectorFunction)
{
J9JVMTIHookInterfaceWithID * vmHook = &j9env->vmHook;
J9JVMTIHookInterfaceWithID * gcOmrHook = &j9env->gcOmrHook;
#if defined (J9VM_INTERP_NATIVE_SUPPORT)
J9JVMTIHookInterfaceWithID * jitHook = &j9env->jitHook;
if (jitHook->hookInterface == NULL) {
jitHook = NULL;
}
#endif
switch(event) {
case JVMTI_EVENT_VM_INIT:
return redirectorFunction(vmHook, J9HOOK_VM_INITIALIZED, jvmtiHookVMInitialized, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_VM_START:
return redirectorFunction(vmHook, J9HOOK_VM_STARTED, jvmtiHookVMStarted, OMR_GET_CALLSITE(), j9env)
#if JAVA_SPEC_VERSION >= 11
|| redirectorFunction(vmHook, J9HOOK_JAVA_BASE_LOADED, jvmtiHookModuleSystemStarted, OMR_GET_CALLSITE(), j9env)
# endif /* JAVA_SPEC_VERSION >= 11 */
;
case JVMTI_EVENT_VM_DEATH:
return redirectorFunction(vmHook, J9HOOK_VM_SHUTTING_DOWN, jvmtiHookVMShutdown, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_METHOD_ENTRY:
return redirectorFunction(vmHook, J9HOOK_VM_METHOD_ENTER, jvmtiHookMethodEnter, OMR_GET_CALLSITE(), j9env) ||
redirectorFunction(vmHook, J9HOOK_VM_NATIVE_METHOD_ENTER, jvmtiHookMethodEnter, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_FIELD_ACCESS:
return redirectorFunction(vmHook, J9HOOK_VM_GET_FIELD, jvmtiHookFieldAccess, OMR_GET_CALLSITE(), j9env) ||
redirectorFunction(vmHook, J9HOOK_VM_GET_STATIC_FIELD, jvmtiHookFieldAccess, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_FIELD_MODIFICATION:
return redirectorFunction(vmHook, J9HOOK_VM_PUT_FIELD, jvmtiHookFieldModification, OMR_GET_CALLSITE(), j9env) ||
redirectorFunction(vmHook, J9HOOK_VM_PUT_STATIC_FIELD, jvmtiHookFieldModification, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_THREAD_START:
return redirectorFunction(vmHook, J9HOOK_VM_THREAD_STARTED, jvmtiHookThreadStarted, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_THREAD_END:
return redirectorFunction(vmHook, J9HOOK_VM_THREAD_END, jvmtiHookThreadEnd, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_CLASS_FILE_LOAD_HOOK:
return redirectorFunction(
vmHook,
(j9env->flags & J9JVMTIENV_FLAG_RETRANSFORM_CAPABLE) ? J9HOOK_VM_CLASS_LOAD_HOOK2 : J9HOOK_VM_CLASS_LOAD_HOOK,
jvmtiHookClassFileLoadHook, OMR_GET_CALLSITE(),
j9env);
case JVMTI_EVENT_CLASS_LOAD:
return redirectorFunction(vmHook, J9HOOK_VM_CLASS_LOAD, jvmtiHookClassLoad, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_CLASS_PREPARE:
return redirectorFunction(vmHook, J9HOOK_VM_CLASS_PREPARE, jvmtiHookClassPrepare, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_SINGLE_STEP:
return redirectorFunction(vmHook, J9HOOK_VM_SINGLE_STEP, jvmtiHookSingleStep, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_BREAKPOINT:
return redirectorFunction(vmHook, J9HOOK_VM_BREAKPOINT, jvmtiHookBreakpoint, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_EXCEPTION:
return redirectorFunction(vmHook, J9HOOK_VM_EXCEPTION_THROW, jvmtiHookExceptionThrow, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_EXCEPTION_CATCH:
return redirectorFunction(vmHook, J9HOOK_VM_EXCEPTION_CATCH, jvmtiHookExceptionCatch, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_FRAME_POP:
return redirectorFunction(vmHook, J9HOOK_VM_FRAME_POP, jvmtiHookFramePop, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_VM_OBJECT_ALLOC:
return redirectorFunction(vmHook, J9HOOK_VM_OBJECT_ALLOCATE, jvmtiHookObjectAllocate, OMR_GET_CALLSITE(), j9env);
#if JAVA_SPEC_VERSION >= 11
case JVMTI_EVENT_SAMPLED_OBJECT_ALLOC:
{
J9JVMTIHookInterfaceWithID * gcHook = &j9env->gcHook;
return redirectorFunction(gcHook, J9HOOK_MM_OBJECT_ALLOCATION_SAMPLING, jvmtiHookSampledObjectAlloc, OMR_GET_CALLSITE(), j9env);
}
#endif /* JAVA_SPEC_VERSION >= 11 */
#if JAVA_SPEC_VERSION >= 19
case JVMTI_EVENT_VIRTUAL_THREAD_START:
return redirectorFunction(vmHook, J9HOOK_VM_VIRTUAL_THREAD_STARTED, jvmtiHookVirtualThreadStarted, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_VIRTUAL_THREAD_END:
return redirectorFunction(vmHook, J9HOOK_VM_VIRTUAL_THREAD_END, jvmtiHookVirtualThreadEnd, OMR_GET_CALLSITE(), j9env);
#endif /* JAVA_SPEC_VERSION >= 19 */
case JVMTI_EVENT_NATIVE_METHOD_BIND:
return redirectorFunction(vmHook, J9HOOK_VM_JNI_NATIVE_BIND, jvmtiHookJNINativeBind, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_METHOD_EXIT:
return redirectorFunction(vmHook, J9HOOK_VM_METHOD_RETURN, jvmtiHookMethodExit, OMR_GET_CALLSITE(), j9env) ||
redirectorFunction(vmHook, J9HOOK_VM_NATIVE_METHOD_RETURN, jvmtiHookMethodExit, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_GARBAGE_COLLECTION_START:
return redirectorFunction(gcOmrHook, J9HOOK_MM_OMR_GLOBAL_GC_START, jvmtiHookGCStart, OMR_GET_CALLSITE(), j9env) ||
redirectorFunction(gcOmrHook, J9HOOK_MM_OMR_LOCAL_GC_START, jvmtiHookGCStart, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_GARBAGE_COLLECTION_FINISH:
case JVMTI_EVENT_OBJECT_FREE:
return redirectorFunction(gcOmrHook, J9HOOK_MM_OMR_GLOBAL_GC_END, jvmtiHookGCEnd, OMR_GET_CALLSITE(), j9env) ||
redirectorFunction(gcOmrHook, J9HOOK_MM_OMR_LOCAL_GC_END, jvmtiHookGCEnd, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_DATA_DUMP_REQUEST:
return redirectorFunction(vmHook, J9HOOK_VM_USER_INTERRUPT, jvmtiHookUserInterrupt, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_MONITOR_CONTENDED_ENTER:
return redirectorFunction(vmHook, J9HOOK_VM_MONITOR_CONTENDED_ENTER, jvmtiHookMonitorContendedEnter, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_MONITOR_CONTENDED_ENTERED:
return redirectorFunction(vmHook, J9HOOK_VM_MONITOR_CONTENDED_ENTERED, jvmtiHookMonitorContendedEntered, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_MONITOR_WAIT:
return redirectorFunction(vmHook, J9HOOK_VM_MONITOR_WAIT, jvmtiHookMonitorWait, OMR_GET_CALLSITE(), j9env);
case JVMTI_EVENT_MONITOR_WAITED:
return redirectorFunction(vmHook, J9HOOK_VM_MONITOR_WAITED, jvmtiHookMonitorWaited, OMR_GET_CALLSITE(), j9env);
#if defined (J9VM_INTERP_NATIVE_SUPPORT)
case JVMTI_EVENT_DYNAMIC_CODE_GENERATED:
case JVMTI_EVENT_COMPILED_METHOD_LOAD:
return redirectorFunction(vmHook, J9HOOK_VM_DYNAMIC_CODE_LOAD, jvmtiHookDynamicCodeLoad, OMR_GET_CALLSITE(), J9JVMTI_DATA_FROM_ENV(j9env));
case JVMTI_EVENT_COMPILED_METHOD_UNLOAD:
return redirectorFunction(vmHook, J9HOOK_VM_DYNAMIC_CODE_UNLOAD, jvmtiHookDynamicCodeUnload, OMR_GET_CALLSITE(), J9JVMTI_DATA_FROM_ENV(j9env));
#endif
case JVMTI_EVENT_RESOURCE_EXHAUSTED:
return redirectorFunction(vmHook, J9HOOK_VM_RESOURCE_EXHAUSTED, jvmtiHookResourceExhausted, OMR_GET_CALLSITE(), j9env);
/* Extension Events */
case J9JVMTI_EVENT_COM_IBM_INSTRUMENTABLE_OBJECT_ALLOC:
return redirectorFunction(vmHook, J9HOOK_VM_OBJECT_ALLOCATE_INSTRUMENTABLE, jvmtiHookObjectAllocate, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_COM_IBM_VM_DUMP_START:
return redirectorFunction(vmHook, J9HOOK_VM_DUMP_START, jvmtiHookVmDumpStart, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_COM_IBM_VM_DUMP_END:
return redirectorFunction(vmHook, J9HOOK_VM_DUMP_END, jvmtiHookVmDumpEnd, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_COM_IBM_GARBAGE_COLLECTION_CYCLE_START:
return redirectorFunction(gcOmrHook, J9HOOK_MM_OMR_GC_CYCLE_START, jvmtiHookGCCycleStart, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_COM_IBM_GARBAGE_COLLECTION_CYCLE_FINISH:
return redirectorFunction(gcOmrHook, J9HOOK_MM_OMR_GC_CYCLE_END, jvmtiHookGCCycleEnd, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_COM_IBM_COMPILING_START:
if (jitHook != NULL) {
return redirectorFunction(jitHook, J9HOOK_JIT_COMPILING_START, jvmtiHookCompilingStart, OMR_GET_CALLSITE(), j9env);
} else {
return 0;
}
case J9JVMTI_EVENT_COM_IBM_COMPILING_END:
if (jitHook != NULL) {
return redirectorFunction(jitHook, J9HOOK_JIT_COMPILING_END, jvmtiHookCompilingEnd, OMR_GET_CALLSITE(), j9env);
} else {
return 0;
}
#if JAVA_SPEC_VERSION >= 19
case J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_MOUNT:
return redirectorFunction(vmHook, J9HOOK_VM_VIRTUAL_THREAD_MOUNT, jvmtiHookVirtualThreadMount, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_COM_SUN_HOTSPOT_EVENTS_VIRTUAL_THREAD_UNMOUNT:
return redirectorFunction(vmHook, J9HOOK_VM_VIRTUAL_THREAD_UNMOUNT, jvmtiHookVirtualThreadUnmount, OMR_GET_CALLSITE(), j9env);
#endif /* JAVA_SPEC_VERSION >= 19 */
#if defined(J9VM_OPT_CRIU_SUPPORT)
case J9JVMTI_EVENT_OPENJ9_VM_CHECKPOINT:
return redirectorFunction(vmHook, J9HOOK_VM_CRIU_CHECKPOINT, jvmtiHookVMCheckpoint, OMR_GET_CALLSITE(), j9env);
case J9JVMTI_EVENT_OPENJ9_VM_RESTORE:
return redirectorFunction(vmHook, J9HOOK_VM_CRIU_RESTORE, jvmtiHookVMRestore, OMR_GET_CALLSITE(), j9env);
#endif /* defined(J9VM_OPT_CRIU_SUPPORT) */
}
return 0;
}
IDATA
hookEvent(J9JVMTIEnv * j9env, jint event)
{
return processEvent(j9env, event, hookRegister);
}
IDATA
unhookEvent(J9JVMTIEnv * j9env, jint event)
{
return processEvent(j9env, event, hookUnregister);
}
IDATA
reserveEvent(J9JVMTIEnv * j9env, jint event)
{
return processEvent(j9env, event, hookReserve);
}
static void
jvmtiHookVMStartedFirst(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9VMInitEvent * data = eventData;
J9JVMTIData * jvmtiData = userData;
Trc_JVMTI_jvmtiHookVMStarted_Entry();
#if defined (J9VM_INTERP_NATIVE_SUPPORT)
/* Allocate the object for the event reporting thread, if one exists */
if (jvmtiData->compileEventThread != NULL) {
J9VMThread * currentThread = data->vmThread;
J9JavaVM * vm = currentThread->javaVM;
J9VMThread * compileEventVMThread = jvmtiData->compileEventVMThread;
vm->internalVMFunctions->initializeAttachedThread
(currentThread, "JVMTI event reporting thread",
vm->systemThreadGroupRef,
((compileEventVMThread->privateFlags & J9_PRIVATE_FLAGS_DAEMON_THREAD) != 0),
compileEventVMThread);
if ((currentThread->currentException == NULL) && (currentThread->threadObject != NULL)) {
TRIGGER_J9HOOK_VM_THREAD_STARTED(vm->hookInterface, currentThread, compileEventVMThread);
} else {
(*((JNIEnv*) currentThread))->ExceptionClear((JNIEnv*) currentThread);
}
}
#endif
jvmtiData->phase = JVMTI_PHASE_START;
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVMStartedFirst);
}
static void
jvmtiHookVMStarted(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData)
{
J9JVMTIEnv * j9env = userData;
jvmtiEventVMStart callback = j9env->callbacks.VMStart;
Trc_JVMTI_jvmtiHookVMStarted_Entry();
if (NULL != callback) {
BOOLEAN reportEvent = TRUE;
#if JAVA_SPEC_VERSION >= 11
if (0 != j9env->capabilities.can_generate_early_vmstart) {
/* VMStart event is already triggered via the jvmtiHookModuleSystemStarted handler */
reportEvent = FALSE;
}
#endif /* JAVA_SPEC_VERSION >= 11 */
if (reportEvent) {
J9VMThread *currentThread = ((J9VMInitEvent *)eventData)->vmThread;
UDATA hadVMAccess = 0;
UDATA javaOffloadOldState = 0;
if (prepareForEvent(j9env, currentThread, currentThread, JVMTI_EVENT_VM_START, NULL, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *) j9env, (JNIEnv *) currentThread);
finishedEvent(currentThread, JVMTI_EVENT_VM_START, hadVMAccess, javaOffloadOldState);
}
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookVMStarted);
}
#if JAVA_SPEC_VERSION >= 11
static void
jvmtiHookModuleSystemStarted(J9HookInterface** hook, UDATA eventNum, void* eventData, void* userData) {
J9JVMTIEnv * j9env = userData;
jvmtiEventVMStart callback = j9env->callbacks.VMStart;
J9VMThread *currentThread = ((J9VMModuleStartEvent *)eventData)->vmThread;
Trc_JVMTI_jvmtiHookModuleSystemStarted_Entry();
Assert_JVMTI_true(J9_ARE_ALL_BITS_SET(currentThread->javaVM->runtimeFlags, J9_RUNTIME_JAVA_BASE_MODULE_CREATED));
/*
* Since Java9 the VMStart event can be triggered from either the J9HOOK_VM_STARTED hook or J9HOOK_JAVA_BASE_LOADED.
* If the can_generate_early_vmstart capability is set, we can trigger this event as early as possible here
* (jvmtiHookModuleSystemStarted handler). Otherwise we have to wait until JavaVM initialization is finished,
* and trigger the VMStart event in the jvmtiHookVMStarted handler.
*/
if ((NULL != callback)
&& (0 != j9env->capabilities.can_generate_early_vmstart)
) {
UDATA javaOffloadOldState = 0;
UDATA hadVMAccess = 0;
if (prepareForEvent(j9env, currentThread, currentThread, JVMTI_EVENT_VM_START, NULL, &hadVMAccess, FALSE, 0, &javaOffloadOldState)) {
callback((jvmtiEnv *) j9env, (JNIEnv *) currentThread);
finishedEvent(currentThread, JVMTI_EVENT_VM_START, hadVMAccess, javaOffloadOldState);
}
}
TRACE_JVMTI_EVENT_RETURN(jvmtiHookModuleSystemStarted);
}
#endif /* JAVA_SPEC_VERSION >= 11 */