author | zgu |
Sun, 20 Jan 2019 12:20:37 -0500 | |
changeset 53407 | 690aed53fef0 |
parent 51804 | eef954e29714 |
child 54093 | 9d02451b536e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#ifndef SHARE_GC_Z_ZPAGE_INLINE_HPP |
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#define SHARE_GC_Z_ZPAGE_INLINE_HPP |
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#include "gc/z/zAddress.inline.hpp" |
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#include "gc/z/zForwardingTable.inline.hpp" |
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#include "gc/z/zGlobals.hpp" |
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#include "gc/z/zLiveMap.inline.hpp" |
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#include "gc/z/zMark.hpp" |
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#include "gc/z/zNUMA.hpp" |
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#include "gc/z/zPage.hpp" |
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#include "gc/z/zPhysicalMemory.inline.hpp" |
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#include "gc/z/zUtils.inline.hpp" |
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#include "gc/z/zVirtualMemory.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/atomic.hpp" |
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#include "utilities/align.hpp" |
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#include "utilities/debug.hpp" |
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inline const char* ZPage::type_to_string() const { |
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switch (type()) { |
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case ZPageTypeSmall: |
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return "Small"; |
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|
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case ZPageTypeMedium: |
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return "Medium"; |
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|
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default: |
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assert(type() == ZPageTypeLarge, "Invalid page type"); |
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return "Large"; |
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} |
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} |
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inline uint32_t ZPage::object_max_count() const { |
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switch (type()) { |
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case ZPageTypeLarge: |
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// A large page can only contain a single |
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// object aligned to the start of the page. |
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return 1; |
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default: |
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return (uint32_t)(size() >> object_alignment_shift()); |
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} |
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} |
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inline size_t ZPage::object_alignment_shift() const { |
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switch (type()) { |
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case ZPageTypeSmall: |
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return ZObjectAlignmentSmallShift; |
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|
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case ZPageTypeMedium: |
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return ZObjectAlignmentMediumShift; |
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default: |
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assert(type() == ZPageTypeLarge, "Invalid page type"); |
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return ZObjectAlignmentLargeShift; |
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} |
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} |
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inline size_t ZPage::object_alignment() const { |
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switch (type()) { |
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case ZPageTypeSmall: |
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return ZObjectAlignmentSmall; |
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case ZPageTypeMedium: |
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return ZObjectAlignmentMedium; |
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default: |
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assert(type() == ZPageTypeLarge, "Invalid page type"); |
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return ZObjectAlignmentLarge; |
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} |
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} |
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inline uint8_t ZPage::type() const { |
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return _type; |
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} |
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inline uintptr_t ZPage::start() const { |
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return _virtual.start(); |
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} |
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inline uintptr_t ZPage::end() const { |
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return _virtual.end(); |
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} |
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inline size_t ZPage::size() const { |
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return _virtual.size(); |
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} |
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inline uintptr_t ZPage::top() const { |
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return _top; |
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} |
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inline size_t ZPage::remaining() const { |
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return end() - top(); |
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} |
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|
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inline ZPhysicalMemory& ZPage::physical_memory() { |
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return _physical; |
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} |
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inline const ZVirtualMemory& ZPage::virtual_memory() const { |
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return _virtual; |
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} |
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inline uint8_t ZPage::numa_id() { |
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if (_numa_id == (uint8_t)-1) { |
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_numa_id = (uint8_t)ZNUMA::memory_id(ZAddress::good(start())); |
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} |
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return _numa_id; |
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} |
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|
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inline bool ZPage::inc_refcount() { |
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for (uint32_t prev_refcount = _refcount; prev_refcount > 0; prev_refcount = _refcount) { |
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if (Atomic::cmpxchg(prev_refcount + 1, &_refcount, prev_refcount) == prev_refcount) { |
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return true; |
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} |
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} |
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return false; |
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} |
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|
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inline bool ZPage::dec_refcount() { |
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assert(is_active(), "Should be active"); |
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return Atomic::sub(1u, &_refcount) == 0; |
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} |
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|
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inline bool ZPage::is_in(uintptr_t addr) const { |
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const uintptr_t offset = ZAddress::offset(addr); |
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return offset >= start() && offset < top(); |
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} |
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|
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inline uintptr_t ZPage::block_start(uintptr_t addr) const { |
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if (block_is_obj(addr)) { |
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return addr; |
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} else { |
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return ZAddress::good(top()); |
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} |
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} |
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|
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inline size_t ZPage::block_size(uintptr_t addr) const { |
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if (block_is_obj(addr)) { |
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return ZUtils::object_size(addr); |
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} else { |
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return end() - top(); |
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} |
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} |
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|
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inline bool ZPage::block_is_obj(uintptr_t addr) const { |
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return ZAddress::offset(addr) < top(); |
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} |
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|
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inline bool ZPage::is_active() const { |
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return _refcount > 0; |
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} |
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|
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inline bool ZPage::is_allocating() const { |
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return is_active() && _seqnum == ZGlobalSeqNum; |
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} |
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|
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inline bool ZPage::is_relocatable() const { |
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return is_active() && _seqnum < ZGlobalSeqNum; |
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} |
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|
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inline bool ZPage::is_detached() const { |
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return _physical.is_null(); |
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} |
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|
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inline bool ZPage::is_mapped() const { |
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return _seqnum > 0; |
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} |
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|
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inline void ZPage::set_pre_mapped() { |
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// The _seqnum variable is also used to signal that the virtual and physical |
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// memory has been mapped. So, we need to set it to non-zero when the memory |
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// has been pre-mapped. |
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_seqnum = 1; |
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} |
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|
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inline bool ZPage::is_pinned() const { |
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return _pinned; |
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} |
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|
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inline void ZPage::set_pinned() { |
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_pinned = 1; |
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} |
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|
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inline bool ZPage::is_forwarding() const { |
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return !_forwarding.is_null(); |
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} |
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|
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inline void ZPage::set_forwarding() { |
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assert(is_marked(), "Should be marked"); |
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_forwarding.setup(_livemap.live_objects()); |
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} |
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|
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inline void ZPage::reset_forwarding() { |
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_forwarding.reset(); |
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_pinned = 0; |
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} |
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|
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inline void ZPage::verify_forwarding() const { |
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_forwarding.verify(object_max_count(), _livemap.live_objects()); |
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} |
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|
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inline bool ZPage::is_marked() const { |
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assert(is_relocatable(), "Invalid page state"); |
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return _livemap.is_marked(); |
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} |
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|
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inline bool ZPage::is_object_marked(uintptr_t addr) const { |
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const size_t index = ((ZAddress::offset(addr) - start()) >> object_alignment_shift()) * 2; |
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return _livemap.get(index); |
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} |
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|
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inline bool ZPage::is_object_strongly_marked(uintptr_t addr) const { |
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const size_t index = ((ZAddress::offset(addr) - start()) >> object_alignment_shift()) * 2; |
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return _livemap.get(index + 1); |
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} |
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|
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inline bool ZPage::is_object_live(uintptr_t addr) const { |
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return is_allocating() || is_object_marked(addr); |
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} |
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|
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inline bool ZPage::is_object_strongly_live(uintptr_t addr) const { |
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return is_allocating() || is_object_strongly_marked(addr); |
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} |
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|
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inline bool ZPage::mark_object(uintptr_t addr, bool finalizable, bool& inc_live) { |
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assert(ZAddress::is_marked(addr), "Invalid address"); |
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assert(is_relocatable(), "Invalid page state"); |
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assert(is_in(addr), "Invalid address"); |
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|
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// Set mark bit |
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const size_t index = ((ZAddress::offset(addr) - start()) >> object_alignment_shift()) * 2; |
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return _livemap.set_atomic(index, finalizable, inc_live); |
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} |
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|
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inline void ZPage::inc_live_atomic(uint32_t objects, size_t bytes) { |
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_livemap.inc_live_atomic(objects, bytes); |
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} |
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|
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inline size_t ZPage::live_bytes() const { |
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assert(is_marked(), "Should be marked"); |
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return _livemap.live_bytes(); |
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} |
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|
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inline void ZPage::object_iterate(ObjectClosure* cl) { |
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_livemap.iterate(cl, ZAddress::good(start()), object_alignment_shift()); |
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} |
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|
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inline uintptr_t ZPage::alloc_object(size_t size) { |
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assert(is_allocating(), "Invalid state"); |
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|
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const size_t aligned_size = align_up(size, object_alignment()); |
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const uintptr_t addr = top(); |
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const uintptr_t new_top = addr + aligned_size; |
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|
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if (new_top > end()) { |
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// Not enough space left |
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return 0; |
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} |
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|
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_top = new_top; |
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|
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return ZAddress::good(addr); |
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} |
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|
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inline uintptr_t ZPage::alloc_object_atomic(size_t size) { |
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assert(is_allocating(), "Invalid state"); |
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|
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const size_t aligned_size = align_up(size, object_alignment()); |
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uintptr_t addr = top(); |
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|
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for (;;) { |
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const uintptr_t new_top = addr + aligned_size; |
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if (new_top > end()) { |
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// Not enough space left |
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return 0; |
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} |
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|
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const uintptr_t prev_top = Atomic::cmpxchg(new_top, &_top, addr); |
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if (prev_top == addr) { |
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// Success |
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return ZAddress::good(addr); |
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} |
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|
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// Retry |
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addr = prev_top; |
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} |
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} |
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|
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inline bool ZPage::undo_alloc_object(uintptr_t addr, size_t size) { |
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assert(is_allocating(), "Invalid state"); |
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|
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const uintptr_t offset = ZAddress::offset(addr); |
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const size_t aligned_size = align_up(size, object_alignment()); |
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const uintptr_t old_top = top(); |
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const uintptr_t new_top = old_top - aligned_size; |
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|
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if (new_top != offset) { |
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// Failed to undo allocation, not the last allocated object |
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return false; |
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} |
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|
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_top = new_top; |
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|
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// Success |
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return true; |
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} |
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333 |
|
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inline bool ZPage::undo_alloc_object_atomic(uintptr_t addr, size_t size) { |
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assert(is_allocating(), "Invalid state"); |
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|
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const uintptr_t offset = ZAddress::offset(addr); |
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const size_t aligned_size = align_up(size, object_alignment()); |
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uintptr_t old_top = top(); |
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|
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for (;;) { |
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const uintptr_t new_top = old_top - aligned_size; |
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if (new_top != offset) { |
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// Failed to undo allocation, not the last allocated object |
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return false; |
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} |
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|
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const uintptr_t prev_top = Atomic::cmpxchg(new_top, &_top, old_top); |
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if (prev_top == old_top) { |
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// Success |
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351 |
return true; |
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352 |
} |
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// Retry |
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old_top = prev_top; |
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} |
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} |
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#endif // SHARE_GC_Z_ZPAGE_INLINE_HPP |