duke@435: /*
trims@1907:  * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: # include "incls/_precompiled.incl"
duke@435: # include "incls/_klassKlass.cpp.incl"
duke@435: 
duke@435: int klassKlass::oop_size(oop obj) const {
duke@435:   assert (obj->is_klass(), "must be a klassOop");
duke@435:   return klassOop(obj)->klass_part()->klass_oop_size();
duke@435: }
duke@435: 
duke@435: klassOop klassKlass::create_klass(TRAPS) {
duke@435:   KlassHandle h_this_klass;
duke@435:   klassKlass o;
duke@435:   // for bootstrapping, handles may not be available yet.
duke@435:   klassOop k = base_create_klass_oop(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL);
duke@435:   k->set_klass(k); // point to thyself
duke@435:   // Do not try to allocate mirror, java.lang.Class not loaded at this point.
duke@435:   // See Universe::fixup_mirrors()
duke@435:   return k;
duke@435: }
duke@435: 
duke@435: void klassKlass::oop_follow_contents(oop obj) {
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435:   // If we are alive it is valid to keep our superclass and subtype caches alive
duke@435:   MarkSweep::mark_and_push(k->adr_super());
duke@435:   for (juint i = 0; i < Klass::primary_super_limit(); i++)
duke@435:     MarkSweep::mark_and_push(k->adr_primary_supers()+i);
duke@435:   MarkSweep::mark_and_push(k->adr_secondary_super_cache());
duke@435:   MarkSweep::mark_and_push(k->adr_secondary_supers());
duke@435:   MarkSweep::mark_and_push(k->adr_java_mirror());
duke@435:   MarkSweep::mark_and_push(k->adr_name());
duke@435:   // We follow the subklass and sibling links at the end of the
duke@435:   // marking phase, since otherwise following them will prevent
duke@435:   // class unloading (all classes are transitively linked from
duke@435:   // java.lang.Object).
duke@435:   MarkSweep::revisit_weak_klass_link(k);
duke@435:   obj->follow_header();
duke@435: }
duke@435: 
duke@435: #ifndef SERIALGC
duke@435: void klassKlass::oop_follow_contents(ParCompactionManager* cm,
duke@435:                                      oop obj) {
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435:   // If we are alive it is valid to keep our superclass and subtype caches alive
duke@435:   PSParallelCompact::mark_and_push(cm, k->adr_super());
duke@435:   for (juint i = 0; i < Klass::primary_super_limit(); i++)
duke@435:     PSParallelCompact::mark_and_push(cm, k->adr_primary_supers()+i);
duke@435:   PSParallelCompact::mark_and_push(cm, k->adr_secondary_super_cache());
duke@435:   PSParallelCompact::mark_and_push(cm, k->adr_secondary_supers());
duke@435:   PSParallelCompact::mark_and_push(cm, k->adr_java_mirror());
duke@435:   PSParallelCompact::mark_and_push(cm, k->adr_name());
duke@435:   // We follow the subklass and sibling links at the end of the
duke@435:   // marking phase, since otherwise following them will prevent
duke@435:   // class unloading (all classes are transitively linked from
duke@435:   // java.lang.Object).
duke@435:   PSParallelCompact::revisit_weak_klass_link(cm, k);
duke@435:   obj->follow_header(cm);
duke@435: }
duke@435: #endif // SERIALGC
duke@435: 
duke@435: int klassKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
duke@435:   // Get size before changing pointers
duke@435:   int size = oop_size(obj);
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435:   blk->do_oop(k->adr_super());
duke@435:   for (juint i = 0; i < Klass::primary_super_limit(); i++)
duke@435:     blk->do_oop(k->adr_primary_supers()+i);
duke@435:   blk->do_oop(k->adr_secondary_super_cache());
duke@435:   blk->do_oop(k->adr_secondary_supers());
duke@435:   blk->do_oop(k->adr_java_mirror());
duke@435:   blk->do_oop(k->adr_name());
duke@435:   // The following are in the perm gen and are treated
duke@435:   // specially in a later phase of a perm gen collection; ...
duke@435:   assert(oop(k)->is_perm(), "should be in perm");
duke@435:   assert(oop(k->subklass())->is_perm_or_null(), "should be in perm");
duke@435:   assert(oop(k->next_sibling())->is_perm_or_null(), "should be in perm");
duke@435:   // ... don't scan them normally, but remember this klassKlass
duke@435:   // for later (see, for instance, oop_follow_contents above
duke@435:   // for what MarkSweep does with it.
duke@435:   if (blk->should_remember_klasses()) {
duke@435:     blk->remember_klass(k);
duke@435:   }
duke@435:   obj->oop_iterate_header(blk);
duke@435:   return size;
duke@435: }
duke@435: 
duke@435: 
duke@435: int klassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
duke@435:   // Get size before changing pointers
duke@435:   int size = oop_size(obj);
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435:   oop* adr;
duke@435:   adr = k->adr_super();
duke@435:   if (mr.contains(adr)) blk->do_oop(adr);
duke@435:   for (juint i = 0; i < Klass::primary_super_limit(); i++) {
duke@435:     adr = k->adr_primary_supers()+i;
duke@435:     if (mr.contains(adr)) blk->do_oop(adr);
duke@435:   }
duke@435:   adr = k->adr_secondary_super_cache();
duke@435:   if (mr.contains(adr)) blk->do_oop(adr);
duke@435:   adr = k->adr_secondary_supers();
duke@435:   if (mr.contains(adr)) blk->do_oop(adr);
duke@435:   adr = k->adr_java_mirror();
duke@435:   if (mr.contains(adr)) blk->do_oop(adr);
duke@435:   adr = k->adr_name();
duke@435:   if (mr.contains(adr)) blk->do_oop(adr);
duke@435:   // The following are "weak links" in the perm gen and are
duke@435:   // treated specially in a later phase of a perm gen collection.
duke@435:   assert(oop(k)->is_perm(), "should be in perm");
duke@435:   assert(oop(k->adr_subklass())->is_perm(), "should be in perm");
duke@435:   assert(oop(k->adr_next_sibling())->is_perm(), "should be in perm");
duke@435:   if (blk->should_remember_klasses()
duke@435:       && (mr.contains(k->adr_subklass())
duke@435:           || mr.contains(k->adr_next_sibling()))) {
duke@435:     blk->remember_klass(k);
duke@435:   }
duke@435:   obj->oop_iterate_header(blk, mr);
duke@435:   return size;
duke@435: }
duke@435: 
duke@435: 
duke@435: int klassKlass::oop_adjust_pointers(oop obj) {
duke@435:   // Get size before changing pointers
duke@435:   int size = oop_size(obj);
duke@435:   obj->adjust_header();
duke@435: 
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435: 
duke@435:   MarkSweep::adjust_pointer(k->adr_super());
duke@435:   for (juint i = 0; i < Klass::primary_super_limit(); i++)
duke@435:     MarkSweep::adjust_pointer(k->adr_primary_supers()+i);
duke@435:   MarkSweep::adjust_pointer(k->adr_secondary_super_cache());
duke@435:   MarkSweep::adjust_pointer(k->adr_secondary_supers());
duke@435:   MarkSweep::adjust_pointer(k->adr_java_mirror());
duke@435:   MarkSweep::adjust_pointer(k->adr_name());
duke@435:   MarkSweep::adjust_pointer(k->adr_subklass());
duke@435:   MarkSweep::adjust_pointer(k->adr_next_sibling());
duke@435:   return size;
duke@435: }
duke@435: 
duke@435: #ifndef SERIALGC
duke@435: void klassKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) {
duke@435: }
duke@435: 
duke@435: void klassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
duke@435: }
duke@435: 
duke@435: int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435: 
duke@435:   oop* const beg_oop = k->oop_block_beg();
duke@435:   oop* const end_oop = k->oop_block_end();
duke@435:   for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
duke@435:     PSParallelCompact::adjust_pointer(cur_oop);
duke@435:   }
duke@435: 
duke@435:   return oop_size(obj);
duke@435: }
duke@435: 
duke@435: int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
duke@435:                                     HeapWord* beg_addr, HeapWord* end_addr) {
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435: 
duke@435:   oop* const beg_oop = MAX2((oop*)beg_addr, k->oop_block_beg());
duke@435:   oop* const end_oop = MIN2((oop*)end_addr, k->oop_block_end());
duke@435:   for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
duke@435:     PSParallelCompact::adjust_pointer(cur_oop);
duke@435:   }
duke@435: 
duke@435:   return oop_size(obj);
duke@435: }
duke@435: #endif // SERIALGC
duke@435: 
duke@435: 
duke@435: // Printing
duke@435: 
duke@435: void klassKlass::oop_print_on(oop obj, outputStream* st) {
duke@435:   Klass::oop_print_on(obj, st);
duke@435: }
duke@435: 
duke@435: void klassKlass::oop_print_value_on(oop obj, outputStream* st) {
duke@435:   Klass::oop_print_value_on(obj, st);
duke@435: }
duke@435: 
duke@435: const char* klassKlass::internal_name() const {
duke@435:   return "{other class}";
duke@435: }
duke@435: 
duke@435: 
duke@435: // Verification
duke@435: 
duke@435: void klassKlass::oop_verify_on(oop obj, outputStream* st) {
duke@435:   Klass::oop_verify_on(obj, st);
duke@435:   guarantee(obj->is_perm(),                      "should be in permspace");
duke@435:   guarantee(obj->is_klass(),                     "should be klass");
duke@435: 
duke@435:   Klass* k = Klass::cast(klassOop(obj));
duke@435:   if (k->super() != NULL) {
duke@435:     guarantee(k->super()->is_perm(),             "should be in permspace");
duke@435:     guarantee(k->super()->is_klass(),            "should be klass");
duke@435:   }
duke@435:   klassOop ko = k->secondary_super_cache();
duke@435:   if( ko != NULL ) {
duke@435:     guarantee(ko->is_perm(),                     "should be in permspace");
duke@435:     guarantee(ko->is_klass(),                    "should be klass");
duke@435:   }
duke@435:   for( uint i = 0; i < primary_super_limit(); i++ ) {
duke@435:     oop ko = k->adr_primary_supers()[i]; // Cannot use normal accessor because it asserts
duke@435:     if( ko != NULL ) {
duke@435:       guarantee(ko->is_perm(),                   "should be in permspace");
duke@435:       guarantee(ko->is_klass(),                  "should be klass");
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   if (k->java_mirror() != NULL || (k->oop_is_instance() && instanceKlass::cast(klassOop(obj))->is_loaded())) {
duke@435:     guarantee(k->java_mirror() != NULL,          "should be allocated");
duke@435:     guarantee(k->java_mirror()->is_perm(),       "should be in permspace");
duke@435:     guarantee(k->java_mirror()->is_instance(),   "should be instance");
duke@435:   }
duke@435:   if (k->name() != NULL) {
duke@435:     guarantee(Universe::heap()->is_in_permanent(k->name()),
duke@435:               "should be in permspace");
duke@435:     guarantee(k->name()->is_symbol(), "should be symbol");
duke@435:   }
duke@435: }