272 }
273
274 oop HeapShared::archive_object(oop obj) {
275 assert(DumpSharedSpaces, "dump-time only");
276
277 oop ao = find_archived_heap_object(obj);
278 if (ao != NULL) {
279 // already archived
280 return ao;
281 }
282
283 int len = obj->size();
284 if (G1CollectedHeap::heap()->is_archive_alloc_too_large(len)) {
285 log_debug(cds, heap)("Cannot archive, object (" PTR_FORMAT ") is too large: " SIZE_FORMAT,
286 p2i(obj), (size_t)obj->size());
287 return NULL;
288 }
289
290 oop archived_oop = cast_to_oop(G1CollectedHeap::heap()->archive_mem_allocate(len));
291 if (archived_oop != NULL) {
292 Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(obj), cast_from_oop<HeapWord*>(archived_oop), len);
293 // Reinitialize markword to remove age/marking/locking/etc.
294 //
295 // We need to retain the identity_hash, because it may have been used by some hashtables
296 // in the shared heap. This also has the side effect of pre-initializing the
297 // identity_hash for all shared objects, so they are less likely to be written
298 // into during run time, increasing the potential of memory sharing.
299 int hash_original = obj->identity_hash();
300 archived_oop->set_mark(markWord::prototype().copy_set_hash(hash_original));
301 assert(archived_oop->mark().is_unlocked(), "sanity");
302
303 DEBUG_ONLY(int hash_archived = archived_oop->identity_hash());
304 assert(hash_original == hash_archived, "Different hash codes: original %x, archived %x", hash_original, hash_archived);
305
306 ArchivedObjectCache* cache = archived_object_cache();
307 cache->put(obj, archived_oop);
308 if (log_is_enabled(Debug, cds, heap)) {
309 ResourceMark rm;
310 log_debug(cds, heap)("Archived heap object " PTR_FORMAT " ==> " PTR_FORMAT " : %s",
311 p2i(obj), p2i(archived_oop), obj->klass()->external_name());
312 }
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272 }
273
274 oop HeapShared::archive_object(oop obj) {
275 assert(DumpSharedSpaces, "dump-time only");
276
277 oop ao = find_archived_heap_object(obj);
278 if (ao != NULL) {
279 // already archived
280 return ao;
281 }
282
283 int len = obj->size();
284 if (G1CollectedHeap::heap()->is_archive_alloc_too_large(len)) {
285 log_debug(cds, heap)("Cannot archive, object (" PTR_FORMAT ") is too large: " SIZE_FORMAT,
286 p2i(obj), (size_t)obj->size());
287 return NULL;
288 }
289
290 oop archived_oop = cast_to_oop(G1CollectedHeap::heap()->archive_mem_allocate(len));
291 if (archived_oop != NULL) {
292 obj->copy_disjoint(cast_from_oop<HeapWord*>(archived_oop), len);
293 // Reinitialize markword to remove age/marking/locking/etc.
294 //
295 // We need to retain the identity_hash, because it may have been used by some hashtables
296 // in the shared heap. This also has the side effect of pre-initializing the
297 // identity_hash for all shared objects, so they are less likely to be written
298 // into during run time, increasing the potential of memory sharing.
299 int hash_original = obj->identity_hash();
300 archived_oop->set_mark(markWord::prototype().copy_set_hash(hash_original));
301 assert(archived_oop->mark().is_unlocked(), "sanity");
302
303 DEBUG_ONLY(int hash_archived = archived_oop->identity_hash());
304 assert(hash_original == hash_archived, "Different hash codes: original %x, archived %x", hash_original, hash_archived);
305
306 ArchivedObjectCache* cache = archived_object_cache();
307 cache->put(obj, archived_oop);
308 if (log_is_enabled(Debug, cds, heap)) {
309 ResourceMark rm;
310 log_debug(cds, heap)("Archived heap object " PTR_FORMAT " ==> " PTR_FORMAT " : %s",
311 p2i(obj), p2i(archived_oop), obj->klass()->external_name());
312 }
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