| /* |
| * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| # include "incls/_precompiled.incl" |
| # include "incls/_klassKlass.cpp.incl" |
| |
| int klassKlass::oop_size(oop obj) const { |
| assert (obj->is_klass(), "must be a klassOop"); |
| return klassOop(obj)->klass_part()->klass_oop_size(); |
| } |
| |
| klassOop klassKlass::create_klass(TRAPS) { |
| KlassHandle h_this_klass; |
| klassKlass o; |
| // for bootstrapping, handles may not be available yet. |
| klassOop k = base_create_klass_oop(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL); |
| k->set_klass(k); // point to thyself |
| // Do not try to allocate mirror, java.lang.Class not loaded at this point. |
| // See Universe::fixup_mirrors() |
| return k; |
| } |
| |
| void klassKlass::oop_follow_contents(oop obj) { |
| Klass* k = Klass::cast(klassOop(obj)); |
| // If we are alive it is valid to keep our superclass and subtype caches alive |
| MarkSweep::mark_and_push(k->adr_super()); |
| for (juint i = 0; i < Klass::primary_super_limit(); i++) |
| MarkSweep::mark_and_push(k->adr_primary_supers()+i); |
| MarkSweep::mark_and_push(k->adr_secondary_super_cache()); |
| MarkSweep::mark_and_push(k->adr_secondary_supers()); |
| MarkSweep::mark_and_push(k->adr_java_mirror()); |
| MarkSweep::mark_and_push(k->adr_name()); |
| // We follow the subklass and sibling links at the end of the |
| // marking phase, since otherwise following them will prevent |
| // class unloading (all classes are transitively linked from |
| // java.lang.Object). |
| MarkSweep::revisit_weak_klass_link(k); |
| obj->follow_header(); |
| } |
| |
| #ifndef SERIALGC |
| void klassKlass::oop_follow_contents(ParCompactionManager* cm, |
| oop obj) { |
| Klass* k = Klass::cast(klassOop(obj)); |
| // If we are alive it is valid to keep our superclass and subtype caches alive |
| PSParallelCompact::mark_and_push(cm, k->adr_super()); |
| for (juint i = 0; i < Klass::primary_super_limit(); i++) |
| PSParallelCompact::mark_and_push(cm, k->adr_primary_supers()+i); |
| PSParallelCompact::mark_and_push(cm, k->adr_secondary_super_cache()); |
| PSParallelCompact::mark_and_push(cm, k->adr_secondary_supers()); |
| PSParallelCompact::mark_and_push(cm, k->adr_java_mirror()); |
| PSParallelCompact::mark_and_push(cm, k->adr_name()); |
| // We follow the subklass and sibling links at the end of the |
| // marking phase, since otherwise following them will prevent |
| // class unloading (all classes are transitively linked from |
| // java.lang.Object). |
| PSParallelCompact::revisit_weak_klass_link(cm, k); |
| obj->follow_header(cm); |
| } |
| #endif // SERIALGC |
| |
| int klassKlass::oop_oop_iterate(oop obj, OopClosure* blk) { |
| // Get size before changing pointers |
| int size = oop_size(obj); |
| Klass* k = Klass::cast(klassOop(obj)); |
| blk->do_oop(k->adr_super()); |
| for (juint i = 0; i < Klass::primary_super_limit(); i++) |
| blk->do_oop(k->adr_primary_supers()+i); |
| blk->do_oop(k->adr_secondary_super_cache()); |
| blk->do_oop(k->adr_secondary_supers()); |
| blk->do_oop(k->adr_java_mirror()); |
| blk->do_oop(k->adr_name()); |
| // The following are in the perm gen and are treated |
| // specially in a later phase of a perm gen collection; ... |
| assert(oop(k)->is_perm(), "should be in perm"); |
| assert(oop(k->subklass())->is_perm_or_null(), "should be in perm"); |
| assert(oop(k->next_sibling())->is_perm_or_null(), "should be in perm"); |
| // ... don't scan them normally, but remember this klassKlass |
| // for later (see, for instance, oop_follow_contents above |
| // for what MarkSweep does with it. |
| if (blk->should_remember_klasses()) { |
| blk->remember_klass(k); |
| } |
| obj->oop_iterate_header(blk); |
| return size; |
| } |
| |
| |
| int klassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { |
| // Get size before changing pointers |
| int size = oop_size(obj); |
| Klass* k = Klass::cast(klassOop(obj)); |
| oop* adr; |
| adr = k->adr_super(); |
| if (mr.contains(adr)) blk->do_oop(adr); |
| for (juint i = 0; i < Klass::primary_super_limit(); i++) { |
| adr = k->adr_primary_supers()+i; |
| if (mr.contains(adr)) blk->do_oop(adr); |
| } |
| adr = k->adr_secondary_super_cache(); |
| if (mr.contains(adr)) blk->do_oop(adr); |
| adr = k->adr_secondary_supers(); |
| if (mr.contains(adr)) blk->do_oop(adr); |
| adr = k->adr_java_mirror(); |
| if (mr.contains(adr)) blk->do_oop(adr); |
| adr = k->adr_name(); |
| if (mr.contains(adr)) blk->do_oop(adr); |
| // The following are "weak links" in the perm gen and are |
| // treated specially in a later phase of a perm gen collection. |
| assert(oop(k)->is_perm(), "should be in perm"); |
| assert(oop(k->adr_subklass())->is_perm(), "should be in perm"); |
| assert(oop(k->adr_next_sibling())->is_perm(), "should be in perm"); |
| if (blk->should_remember_klasses() |
| && (mr.contains(k->adr_subklass()) |
| || mr.contains(k->adr_next_sibling()))) { |
| blk->remember_klass(k); |
| } |
| obj->oop_iterate_header(blk, mr); |
| return size; |
| } |
| |
| |
| int klassKlass::oop_adjust_pointers(oop obj) { |
| // Get size before changing pointers |
| int size = oop_size(obj); |
| obj->adjust_header(); |
| |
| Klass* k = Klass::cast(klassOop(obj)); |
| |
| MarkSweep::adjust_pointer(k->adr_super()); |
| for (juint i = 0; i < Klass::primary_super_limit(); i++) |
| MarkSweep::adjust_pointer(k->adr_primary_supers()+i); |
| MarkSweep::adjust_pointer(k->adr_secondary_super_cache()); |
| MarkSweep::adjust_pointer(k->adr_secondary_supers()); |
| MarkSweep::adjust_pointer(k->adr_java_mirror()); |
| MarkSweep::adjust_pointer(k->adr_name()); |
| MarkSweep::adjust_pointer(k->adr_subklass()); |
| MarkSweep::adjust_pointer(k->adr_next_sibling()); |
| return size; |
| } |
| |
| #ifndef SERIALGC |
| void klassKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) { |
| } |
| |
| void klassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
| } |
| |
| int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
| Klass* k = Klass::cast(klassOop(obj)); |
| |
| oop* const beg_oop = k->oop_block_beg(); |
| oop* const end_oop = k->oop_block_end(); |
| for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) { |
| PSParallelCompact::adjust_pointer(cur_oop); |
| } |
| |
| return oop_size(obj); |
| } |
| |
| int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, |
| HeapWord* beg_addr, HeapWord* end_addr) { |
| Klass* k = Klass::cast(klassOop(obj)); |
| |
| oop* const beg_oop = MAX2((oop*)beg_addr, k->oop_block_beg()); |
| oop* const end_oop = MIN2((oop*)end_addr, k->oop_block_end()); |
| for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) { |
| PSParallelCompact::adjust_pointer(cur_oop); |
| } |
| |
| return oop_size(obj); |
| } |
| #endif // SERIALGC |
| |
| |
| #ifndef PRODUCT |
| |
| // Printing |
| |
| void klassKlass::oop_print_on(oop obj, outputStream* st) { |
| Klass::oop_print_on(obj, st); |
| } |
| |
| |
| void klassKlass::oop_print_value_on(oop obj, outputStream* st) { |
| Klass::oop_print_value_on(obj, st); |
| } |
| |
| #endif |
| |
| const char* klassKlass::internal_name() const { |
| return "{other class}"; |
| } |
| |
| |
| // Verification |
| |
| void klassKlass::oop_verify_on(oop obj, outputStream* st) { |
| Klass::oop_verify_on(obj, st); |
| guarantee(obj->is_perm(), "should be in permspace"); |
| guarantee(obj->is_klass(), "should be klass"); |
| |
| Klass* k = Klass::cast(klassOop(obj)); |
| if (k->super() != NULL) { |
| guarantee(k->super()->is_perm(), "should be in permspace"); |
| guarantee(k->super()->is_klass(), "should be klass"); |
| } |
| klassOop ko = k->secondary_super_cache(); |
| if( ko != NULL ) { |
| guarantee(ko->is_perm(), "should be in permspace"); |
| guarantee(ko->is_klass(), "should be klass"); |
| } |
| for( uint i = 0; i < primary_super_limit(); i++ ) { |
| oop ko = k->adr_primary_supers()[i]; // Cannot use normal accessor because it asserts |
| if( ko != NULL ) { |
| guarantee(ko->is_perm(), "should be in permspace"); |
| guarantee(ko->is_klass(), "should be klass"); |
| } |
| } |
| |
| if (k->java_mirror() != NULL || (k->oop_is_instance() && instanceKlass::cast(klassOop(obj))->is_loaded())) { |
| guarantee(k->java_mirror() != NULL, "should be allocated"); |
| guarantee(k->java_mirror()->is_perm(), "should be in permspace"); |
| guarantee(k->java_mirror()->is_instance(), "should be instance"); |
| } |
| if (k->name() != NULL) { |
| guarantee(Universe::heap()->is_in_permanent(k->name()), |
| "should be in permspace"); |
| guarantee(k->name()->is_symbol(), "should be symbol"); |
| } |
| } |