418 lines
19 KiB
C++
418 lines
19 KiB
C++
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/*
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* Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_instanceRefKlass.cpp.incl"
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void instanceRefKlass::oop_follow_contents(oop obj) {
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj);
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oop referent = *referent_addr;
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, (address)obj);
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}
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)
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if (referent != NULL) {
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if (!referent->is_gc_marked() &&
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MarkSweep::ref_processor()->
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discover_reference(obj, reference_type())) {
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// reference already enqueued, referent will be traversed later
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instanceKlass::oop_follow_contents(obj);
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, (address)obj);
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}
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)
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return;
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} else {
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// treat referent as normal oop
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, (address)obj);
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}
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)
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MarkSweep::mark_and_push(referent_addr);
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}
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}
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// treat next as normal oop. next is a link in the pending list.
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oop* next_addr = java_lang_ref_Reference::next_addr(obj);
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr);
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}
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)
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MarkSweep::mark_and_push(next_addr);
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instanceKlass::oop_follow_contents(obj);
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}
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#ifndef SERIALGC
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void instanceRefKlass::oop_follow_contents(ParCompactionManager* cm,
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oop obj) {
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj);
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oop referent = *referent_addr;
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, (address)obj);
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}
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)
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if (referent != NULL) {
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if (PSParallelCompact::mark_bitmap()->is_unmarked(referent) &&
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PSParallelCompact::ref_processor()->
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discover_reference(obj, reference_type())) {
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// reference already enqueued, referent will be traversed later
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instanceKlass::oop_follow_contents(cm, obj);
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, (address)obj);
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}
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)
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return;
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} else {
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// treat referent as normal oop
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, (address)obj);
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}
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)
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PSParallelCompact::mark_and_push(cm, referent_addr);
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}
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}
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// treat next as normal oop. next is a link in the pending list.
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oop* next_addr = java_lang_ref_Reference::next_addr(obj);
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debug_only(
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr);
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}
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)
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PSParallelCompact::mark_and_push(cm, next_addr);
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instanceKlass::oop_follow_contents(cm, obj);
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}
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#endif // SERIALGC
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int instanceRefKlass::oop_adjust_pointers(oop obj) {
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int size = size_helper();
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instanceKlass::oop_adjust_pointers(obj);
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj);
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MarkSweep::adjust_pointer(referent_addr);
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oop* next_addr = java_lang_ref_Reference::next_addr(obj);
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MarkSweep::adjust_pointer(next_addr);
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oop* discovered_addr = java_lang_ref_Reference::discovered_addr(obj);
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MarkSweep::adjust_pointer(discovered_addr);
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#ifdef ASSERT
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr("instanceRefKlass::oop_adjust_pointers obj "
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INTPTR_FORMAT, (address)obj);
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gclog_or_tty->print_cr(" referent_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, referent_addr,
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referent_addr ? (address)*referent_addr : NULL);
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gclog_or_tty->print_cr(" next_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, next_addr,
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next_addr ? (address)*next_addr : NULL);
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gclog_or_tty->print_cr(" discovered_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, discovered_addr,
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discovered_addr ? (address)*discovered_addr : NULL);
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}
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#endif
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return size;
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}
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#define InstanceRefKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \
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\
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int instanceRefKlass:: \
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oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \
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/* Get size before changing pointers */ \
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SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\
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\
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int size = instanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \
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\
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj); \
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oop referent = *referent_addr; \
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if (referent != NULL) { \
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ReferenceProcessor* rp = closure->_ref_processor; \
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if (!referent->is_gc_marked() && (rp != NULL) && \
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rp->discover_reference(obj, reference_type())) { \
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return size; \
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} else { \
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/* treat referent as normal oop */ \
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SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk);\
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closure->do_oop##nv_suffix(referent_addr); \
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} \
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} \
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\
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/* treat next as normal oop */ \
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oop* next_addr = java_lang_ref_Reference::next_addr(obj); \
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SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk); \
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closure->do_oop##nv_suffix(next_addr); \
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return size; \
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}
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#define InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \
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\
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int instanceRefKlass:: \
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oop_oop_iterate##nv_suffix##_m(oop obj, \
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OopClosureType* closure, \
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MemRegion mr) { \
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SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\
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\
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int size = instanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \
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\
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj); \
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oop referent = *referent_addr; \
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if (referent != NULL && mr.contains(referent_addr)) { \
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ReferenceProcessor* rp = closure->_ref_processor; \
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if (!referent->is_gc_marked() && (rp != NULL) && \
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rp->discover_reference(obj, reference_type())) { \
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return size; \
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} else { \
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/* treat referent as normal oop */ \
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SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk);\
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closure->do_oop##nv_suffix(referent_addr); \
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} \
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} \
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\
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/* treat next as normal oop */ \
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oop* next_addr = java_lang_ref_Reference::next_addr(obj); \
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if (mr.contains(next_addr)) { \
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SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk);\
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closure->do_oop##nv_suffix(next_addr); \
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} \
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return size; \
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}
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ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN)
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ALL_OOP_OOP_ITERATE_CLOSURES_3(InstanceRefKlass_OOP_OOP_ITERATE_DEFN)
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ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m)
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ALL_OOP_OOP_ITERATE_CLOSURES_3(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m)
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#ifndef SERIALGC
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void instanceRefKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) {
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assert(!pm->depth_first(), "invariant");
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj);
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if (PSScavenge::should_scavenge(*referent_addr)) {
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ReferenceProcessor* rp = PSScavenge::reference_processor();
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if (rp->discover_reference(obj, reference_type())) {
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// reference already enqueued, referent and next will be traversed later
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instanceKlass::oop_copy_contents(pm, obj);
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return;
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} else {
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// treat referent as normal oop
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pm->claim_or_forward_breadth(referent_addr);
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}
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}
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// treat next as normal oop
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oop* next_addr = java_lang_ref_Reference::next_addr(obj);
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if (PSScavenge::should_scavenge(*next_addr)) {
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pm->claim_or_forward_breadth(next_addr);
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}
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instanceKlass::oop_copy_contents(pm, obj);
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}
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void instanceRefKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
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assert(pm->depth_first(), "invariant");
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj);
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if (PSScavenge::should_scavenge(*referent_addr)) {
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ReferenceProcessor* rp = PSScavenge::reference_processor();
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if (rp->discover_reference(obj, reference_type())) {
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// reference already enqueued, referent and next will be traversed later
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instanceKlass::oop_push_contents(pm, obj);
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return;
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} else {
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// treat referent as normal oop
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pm->claim_or_forward_depth(referent_addr);
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}
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}
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// treat next as normal oop
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oop* next_addr = java_lang_ref_Reference::next_addr(obj);
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if (PSScavenge::should_scavenge(*next_addr)) {
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pm->claim_or_forward_depth(next_addr);
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}
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instanceKlass::oop_push_contents(pm, obj);
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}
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int instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
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instanceKlass::oop_update_pointers(cm, obj);
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oop* referent_addr = java_lang_ref_Reference::referent_addr(obj);
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PSParallelCompact::adjust_pointer(referent_addr);
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oop* next_addr = java_lang_ref_Reference::next_addr(obj);
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PSParallelCompact::adjust_pointer(next_addr);
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oop* discovered_addr = java_lang_ref_Reference::discovered_addr(obj);
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PSParallelCompact::adjust_pointer(discovered_addr);
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#ifdef ASSERT
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr("instanceRefKlass::oop_update_pointers obj "
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INTPTR_FORMAT, (oopDesc*) obj);
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gclog_or_tty->print_cr(" referent_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, referent_addr,
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referent_addr ? (oopDesc*) *referent_addr : NULL);
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gclog_or_tty->print_cr(" next_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, next_addr,
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next_addr ? (oopDesc*) *next_addr : NULL);
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gclog_or_tty->print_cr(" discovered_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, discovered_addr,
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discovered_addr ? (oopDesc*) *discovered_addr : NULL);
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}
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#endif
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return size_helper();
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}
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int
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instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
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HeapWord* beg_addr, HeapWord* end_addr) {
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instanceKlass::oop_update_pointers(cm, obj, beg_addr, end_addr);
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oop* p;
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oop* referent_addr = p = java_lang_ref_Reference::referent_addr(obj);
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PSParallelCompact::adjust_pointer(p, beg_addr, end_addr);
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oop* next_addr = p = java_lang_ref_Reference::next_addr(obj);
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PSParallelCompact::adjust_pointer(p, beg_addr, end_addr);
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oop* discovered_addr = p = java_lang_ref_Reference::discovered_addr(obj);
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PSParallelCompact::adjust_pointer(p, beg_addr, end_addr);
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#ifdef ASSERT
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if(TraceReferenceGC && PrintGCDetails) {
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gclog_or_tty->print_cr("instanceRefKlass::oop_update_pointers obj "
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INTPTR_FORMAT, (oopDesc*) obj);
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gclog_or_tty->print_cr(" referent_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, referent_addr,
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referent_addr ? (oopDesc*) *referent_addr : NULL);
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gclog_or_tty->print_cr(" next_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, next_addr,
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next_addr ? (oopDesc*) *next_addr : NULL);
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gclog_or_tty->print_cr(" discovered_addr/* " INTPTR_FORMAT " / "
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INTPTR_FORMAT, discovered_addr,
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discovered_addr ? (oopDesc*) *discovered_addr : NULL);
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}
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#endif
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return size_helper();
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}
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#endif // SERIALGC
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void instanceRefKlass::update_nonstatic_oop_maps(klassOop k) {
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// Clear the nonstatic oop-map entries corresponding to referent
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// and nextPending field. They are treated specially by the
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// garbage collector.
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// The discovered field is used only by the garbage collector
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// and is also treated specially.
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instanceKlass* ik = instanceKlass::cast(k);
|
||
|
|
|
||
|
|
// Check that we have the right class
|
||
|
|
debug_only(static bool first_time = true);
|
||
|
|
assert(k == SystemDictionary::reference_klass() && first_time,
|
||
|
|
"Invalid update of maps");
|
||
|
|
debug_only(first_time = false);
|
||
|
|
assert(ik->nonstatic_oop_map_size() == 1, "just checking");
|
||
|
|
|
||
|
|
OopMapBlock* map = ik->start_of_nonstatic_oop_maps();
|
||
|
|
|
||
|
|
// Check that the current map is (2,4) - currently points at field with
|
||
|
|
// offset 2 (words) and has 4 map entries.
|
||
|
|
debug_only(int offset = java_lang_ref_Reference::referent_offset);
|
||
|
|
debug_only(int length = ((java_lang_ref_Reference::discovered_offset -
|
||
|
|
java_lang_ref_Reference::referent_offset)/wordSize) + 1);
|
||
|
|
|
||
|
|
if (UseSharedSpaces) {
|
||
|
|
assert(map->offset() == java_lang_ref_Reference::queue_offset &&
|
||
|
|
map->length() == 1, "just checking");
|
||
|
|
} else {
|
||
|
|
assert(map->offset() == offset && map->length() == length,
|
||
|
|
"just checking");
|
||
|
|
|
||
|
|
// Update map to (3,1) - point to offset of 3 (words) with 1 map entry.
|
||
|
|
map->set_offset(java_lang_ref_Reference::queue_offset);
|
||
|
|
map->set_length(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Verification
|
||
|
|
|
||
|
|
void instanceRefKlass::oop_verify_on(oop obj, outputStream* st) {
|
||
|
|
instanceKlass::oop_verify_on(obj, st);
|
||
|
|
// Verify referent field
|
||
|
|
oop referent = java_lang_ref_Reference::referent(obj);
|
||
|
|
|
||
|
|
// We should make this general to all heaps
|
||
|
|
GenCollectedHeap* gch = NULL;
|
||
|
|
if (Universe::heap()->kind() == CollectedHeap::GenCollectedHeap)
|
||
|
|
gch = GenCollectedHeap::heap();
|
||
|
|
|
||
|
|
if (referent != NULL) {
|
||
|
|
guarantee(referent->is_oop(), "referent field heap failed");
|
||
|
|
if (gch != NULL && !gch->is_in_youngest(obj))
|
||
|
|
// We do a specific remembered set check here since the referent
|
||
|
|
// field is not part of the oop mask and therefore skipped by the
|
||
|
|
// regular verify code.
|
||
|
|
obj->verify_old_oop(java_lang_ref_Reference::referent_addr(obj), true);
|
||
|
|
}
|
||
|
|
// Verify next field
|
||
|
|
oop next = java_lang_ref_Reference::next(obj);
|
||
|
|
if (next != NULL) {
|
||
|
|
guarantee(next->is_oop(), "next field verify failed");
|
||
|
|
guarantee(next->is_instanceRef(), "next field verify failed");
|
||
|
|
if (gch != NULL && !gch->is_in_youngest(obj)) {
|
||
|
|
// We do a specific remembered set check here since the next field is
|
||
|
|
// not part of the oop mask and therefore skipped by the regular
|
||
|
|
// verify code.
|
||
|
|
obj->verify_old_oop(java_lang_ref_Reference::next_addr(obj), true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void instanceRefKlass::acquire_pending_list_lock(BasicLock *pending_list_basic_lock) {
|
||
|
|
// we may enter this with pending exception set
|
||
|
|
PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument
|
||
|
|
Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock());
|
||
|
|
ObjectSynchronizer::fast_enter(h_lock, pending_list_basic_lock, false, THREAD);
|
||
|
|
assert(ObjectSynchronizer::current_thread_holds_lock(
|
||
|
|
JavaThread::current(), h_lock),
|
||
|
|
"Locking should have succeeded");
|
||
|
|
if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
|
||
|
|
}
|
||
|
|
|
||
|
|
void instanceRefKlass::release_and_notify_pending_list_lock(
|
||
|
|
BasicLock *pending_list_basic_lock) {
|
||
|
|
// we may enter this with pending exception set
|
||
|
|
PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument
|
||
|
|
//
|
||
|
|
Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock());
|
||
|
|
assert(ObjectSynchronizer::current_thread_holds_lock(
|
||
|
|
JavaThread::current(), h_lock),
|
||
|
|
"Lock should be held");
|
||
|
|
// Notify waiters on pending lists lock if there is any reference.
|
||
|
|
if (java_lang_ref_Reference::pending_list() != NULL) {
|
||
|
|
ObjectSynchronizer::notifyall(h_lock, THREAD);
|
||
|
|
}
|
||
|
|
ObjectSynchronizer::fast_exit(h_lock(), pending_list_basic_lock, THREAD);
|
||
|
|
if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
|
||
|
|
}
|