jdk8-mips64-public/hotspot: src/share/vm/oops/klassKlass.cpp@126ea7725993 (annotated)

src/share/vm/oops/klassKlass.cpp@126ea7725993 (annotated)

src/share/vm/oops/klassKlass.cpp

Tue, 03 Aug 2010 08:13:38 -0400

author: bobv
date: Tue, 03 Aug 2010 08:13:38 -0400
changeset 2036: 126ea7725993
parent 1907: c18cbe5936b8
child 2068: 7fcd5f39bd7a
permissions: -rw-r--r--

6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

 /*
  * Copyright (c) 1997, 2006, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.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
 // 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);
 }
 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");
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/klassKlass.cpp@126ea7725993 (annotated)

src/share/vm/oops/klassKlass.cpp