static void finalizeObject(Env* env, Object* obj) {
// TRACEF("finalizeObject: %p (%s)\n", obj, obj->clazz->name);
rvmLockMutex(&referentsLock);
void* key = (void*) GC_HIDE_POINTER(obj);
ReferentEntry* referentEntry;
HASH_FIND_PTR(referents, &key, referentEntry);
assert(referentEntry != NULL);
if (referentEntry->references == NULL) {
// The object is not referenced by any type of reference and can never be resurrected.
HASH_DEL(referents, referentEntry);
rvmUnlockMutex(&referentsLock);
return;
}
Object* softReferences = NULL;
Object* weakReferences = NULL;
Object* finalizerReferences = NULL;
Object* phantomReferences = NULL;
Object* clearedReferences = NULL;
ReferenceList* refNode;
while (referentEntry->references != NULL) {
refNode = referentEntry->references;
LL_DELETE(referentEntry->references, refNode);
Object** list = NULL;
Object* reference = refNode->reference;
if (rvmIsSubClass(java_lang_ref_SoftReference, reference->clazz)) {
list = &softReferences;
} else if (rvmIsSubClass(java_lang_ref_WeakReference, reference->clazz)) {
list = &weakReferences;
} else if (rvmIsSubClass(java_lang_ref_FinalizerReference, reference->clazz)) {
list = &finalizerReferences;
} else if (rvmIsSubClass(java_lang_ref_PhantomReference, reference->clazz)) {
list = &phantomReferences;
}
enqueuePendingReference(env, reference, list);
}
assert(referentEntry->references == NULL);
clearAndEnqueueReferences(env, &softReferences, &clearedReferences);
clearAndEnqueueReferences(env, &weakReferences, &clearedReferences);
enqueueFinalizerReferences(env, &finalizerReferences, &clearedReferences);
clearAndEnqueueReferences(env, &phantomReferences, &clearedReferences);
// Reregister for finalization. If no new references have been added to the list of references for the referent the
// next time it gets finalized we know it will never be resurrected.
GC_REGISTER_FINALIZER_NO_ORDER(obj, _finalizeObject, NULL, NULL, NULL);
rvmUnlockMutex(&referentsLock);
if (clearedReferences != NULL) {
rvmCallVoidClassMethod(env, java_lang_ref_ReferenceQueue, java_lang_ref_ReferenceQueue_add, clearedReferences);
assert(rvmExceptionOccurred(env) == NULL);
}
}
void rvmRegisterReference(Env* env, Object* reference, Object* referent) {
if (referent) {
// Add 'reference' to the references list for 'referent' in the referents hashtable
rvmLockMutex(&referentsLock);
ReferenceList* l = rvmAllocateMemory(env, sizeof(ReferenceList));
if (!l) goto done; // OOM thrown
l->reference = reference;
void* key = (void*) GC_HIDE_POINTER(referent); // Hide the pointer from the GC so that it doesn't prevent the referent from being GCed.
ReferentEntry* referentEntry;
HASH_FIND_PTR(referents, &key, referentEntry);
if (!referentEntry) {
// referent is not in the hashtable. Add it.
referentEntry = rvmAllocateMemory(env, sizeof(ReferentEntry));
if (!referentEntry) goto done; // OOM thrown
referentEntry->key = key;
HASH_ADD_PTR(referents, key, referentEntry);
}
// Add the reference to the referent's list of references
LL_PREPEND(referentEntry->references, l);
// Register the referent for finalization
GC_REGISTER_FINALIZER_NO_ORDER(referent, _finalizeObject, NULL, NULL, NULL);
done:
rvmUnlockMutex(&referentsLock);
}
}
jboolean rvmAddObjectGCRoot(Env* env, Object* object) {
rvmLockMutex(&gcRootsLock);
jboolean r = addObjectGCRoot(env, object, (void***) &objectGCRoots, &objectGCRootsCount,
&objectGCRootsSize, OBJECTS_GC_ROOTS_INITIAL_SIZE);
rvmUnlockMutex(&gcRootsLock);
return r;
}
void registerCleanupHandler(Env* env, Object* object, CleanupHandler handler) {
rvmLockMutex(&referentsLock);
CleanupHandlerList* l = rvmAllocateMemory(env, sizeof(CleanupHandlerList));
if (!l) goto done; // OOM thrown
l->handler = handler;
ReferentEntry* referentEntry = getReferentEntryForObject(env, object);
if (!referentEntry) goto done;
// Add the handler to the object's list of cleanup handlers
LL_PREPEND(referentEntry->cleanupHandlers, l);
// Register the referent for finalization
GC_REGISTER_FINALIZER_NO_ORDER(object, _finalizeObject, NULL, NULL, NULL);
done:
rvmUnlockMutex(&referentsLock);
}
void rvmRegisterReference(Env* env, Object* reference, Object* referent) {
if (referent) {
// Add 'reference' to the references list for 'referent' in the referents hashtable
rvmLockMutex(&referentsLock);
ReferenceList* l = rvmAllocateMemory(env, sizeof(ReferenceList));
if (!l) goto done; // OOM thrown
l->reference = reference;
ReferentEntry* referentEntry = getReferentEntryForObject(env, referent);
if (!referentEntry) goto done;
// Add the reference to the referent's list of references
LL_PREPEND(referentEntry->references, l);
// Register the referent for finalization
GC_REGISTER_FINALIZER_NO_ORDER(referent, _finalizeObject, NULL, NULL, NULL);
done:
rvmUnlockMutex(&referentsLock);
}
}
static inline void releaseThreadStackTraceLock() {
rvmUnlockMutex(&threadStackTraceLock);
}
static inline void releaseNativeLibsLock() {
rvmUnlockMutex(&nativeLibsLock);
}
inline void rvmUnlockThreadsList() {
rvmUnlockMutex(&threadsLock);
}
static inline void releaseInternedStringsLock() {
rvmUnlockMutex(&internedStringsLock);
}
static inline void releaseClassLock() {
rvmUnlockMutex(&classLock);
}
