265 }
266
267 oop HeapShared::archive_object(oop obj) {
268 assert(DumpSharedSpaces, "dump-time only");
269
270 oop ao = find_archived_heap_object(obj);
271 if (ao != NULL) {
272 // already archived
273 return ao;
274 }
275
276 int len = obj->size();
277 if (G1CollectedHeap::heap()->is_archive_alloc_too_large(len)) {
278 log_debug(cds, heap)("Cannot archive, object (" PTR_FORMAT ") is too large: " SIZE_FORMAT,
279 p2i(obj), (size_t)obj->size());
280 return NULL;
281 }
282
283 oop archived_oop = cast_to_oop(G1CollectedHeap::heap()->archive_mem_allocate(len));
284 if (archived_oop != NULL) {
285 Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(obj), cast_from_oop<HeapWord*>(archived_oop), len);
286 // Reinitialize markword to remove age/marking/locking/etc.
287 //
288 // We need to retain the identity_hash, because it may have been used by some hashtables
289 // in the shared heap. This also has the side effect of pre-initializing the
290 // identity_hash for all shared objects, so they are less likely to be written
291 // into during run time, increasing the potential of memory sharing.
292 int hash_original = obj->identity_hash();
293 archived_oop->set_mark(markWord::prototype().copy_set_hash(hash_original));
294 assert(archived_oop->mark().is_unlocked(), "sanity");
295
296 DEBUG_ONLY(int hash_archived = archived_oop->identity_hash());
297 assert(hash_original == hash_archived, "Different hash codes: original %x, archived %x", hash_original, hash_archived);
298
299 ArchivedObjectCache* cache = archived_object_cache();
300 cache->put(obj, archived_oop);
301 if (log_is_enabled(Debug, cds, heap)) {
302 ResourceMark rm;
303 log_debug(cds, heap)("Archived heap object " PTR_FORMAT " ==> " PTR_FORMAT " : %s",
304 p2i(obj), p2i(archived_oop), obj->klass()->external_name());
305 }
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265 }
266
267 oop HeapShared::archive_object(oop obj) {
268 assert(DumpSharedSpaces, "dump-time only");
269
270 oop ao = find_archived_heap_object(obj);
271 if (ao != NULL) {
272 // already archived
273 return ao;
274 }
275
276 int len = obj->size();
277 if (G1CollectedHeap::heap()->is_archive_alloc_too_large(len)) {
278 log_debug(cds, heap)("Cannot archive, object (" PTR_FORMAT ") is too large: " SIZE_FORMAT,
279 p2i(obj), (size_t)obj->size());
280 return NULL;
281 }
282
283 oop archived_oop = cast_to_oop(G1CollectedHeap::heap()->archive_mem_allocate(len));
284 if (archived_oop != NULL) {
285 obj->copy_disjoint(cast_from_oop<HeapWord*>(archived_oop), len);
286 // Reinitialize markword to remove age/marking/locking/etc.
287 //
288 // We need to retain the identity_hash, because it may have been used by some hashtables
289 // in the shared heap. This also has the side effect of pre-initializing the
290 // identity_hash for all shared objects, so they are less likely to be written
291 // into during run time, increasing the potential of memory sharing.
292 int hash_original = obj->identity_hash();
293 archived_oop->set_mark(markWord::prototype().copy_set_hash(hash_original));
294 assert(archived_oop->mark().is_unlocked(), "sanity");
295
296 DEBUG_ONLY(int hash_archived = archived_oop->identity_hash());
297 assert(hash_original == hash_archived, "Different hash codes: original %x, archived %x", hash_original, hash_archived);
298
299 ArchivedObjectCache* cache = archived_object_cache();
300 cache->put(obj, archived_oop);
301 if (log_is_enabled(Debug, cds, heap)) {
302 ResourceMark rm;
303 log_debug(cds, heap)("Archived heap object " PTR_FORMAT " ==> " PTR_FORMAT " : %s",
304 p2i(obj), p2i(archived_oop), obj->klass()->external_name());
305 }
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