| /* |
| * Copyright (c) 2015, 2019, 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. |
| */ |
| |
| #ifndef SHARE_GC_Z_ZADDRESS_INLINE_HPP |
| #define SHARE_GC_Z_ZADDRESS_INLINE_HPP |
| |
| #include "gc/z/zAddress.hpp" |
| #include "gc/z/zGlobals.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/macros.hpp" |
| |
| inline bool ZAddress::is_null(uintptr_t value) { |
| return value == 0; |
| } |
| |
| inline bool ZAddress::is_bad(uintptr_t value) { |
| return value & ZAddressBadMask; |
| } |
| |
| inline bool ZAddress::is_good(uintptr_t value) { |
| return !is_bad(value) && !is_null(value); |
| } |
| |
| inline bool ZAddress::is_good_or_null(uintptr_t value) { |
| // Checking if an address is "not bad" is an optimized version of |
| // checking if it's "good or null", which eliminates an explicit |
| // null check. However, the implicit null check only checks that |
| // the mask bits are zero, not that the entire address is zero. |
| // This means that an address without mask bits would pass through |
| // the barrier as if it was null. This should be harmless as such |
| // addresses should ever be passed through the barrier. |
| const bool result = !is_bad(value); |
| assert((is_good(value) || is_null(value)) == result, "Bad address"); |
| return result; |
| } |
| |
| inline bool ZAddress::is_weak_bad(uintptr_t value) { |
| return value & ZAddressWeakBadMask; |
| } |
| |
| inline bool ZAddress::is_weak_good(uintptr_t value) { |
| return !is_weak_bad(value) && !is_null(value); |
| } |
| |
| inline bool ZAddress::is_weak_good_or_null(uintptr_t value) { |
| return !is_weak_bad(value); |
| } |
| |
| inline bool ZAddress::is_marked(uintptr_t value) { |
| return value & ZAddressMetadataMarked; |
| } |
| |
| inline bool ZAddress::is_finalizable(uintptr_t value) { |
| return value & ZAddressMetadataFinalizable; |
| } |
| |
| inline bool ZAddress::is_finalizable_good(uintptr_t value) { |
| return is_finalizable(value) && is_good(value ^ ZAddressMetadataFinalizable); |
| } |
| |
| inline bool ZAddress::is_remapped(uintptr_t value) { |
| return value & ZAddressMetadataRemapped; |
| } |
| |
| inline bool ZAddress::is_in(uintptr_t value) { |
| // Check that exactly one non-offset bit is set |
| if (!is_power_of_2(value & ~ZAddressOffsetMask)) { |
| return false; |
| } |
| |
| // Check that one of the non-finalizable metadata is set |
| return value & (ZAddressMetadataMask & ~ZAddressMetadataFinalizable); |
| } |
| |
| inline uintptr_t ZAddress::address(uintptr_t value) { |
| return value | ZAddressBase; |
| } |
| |
| inline uintptr_t ZAddress::offset(uintptr_t value) { |
| return value & ZAddressOffsetMask; |
| } |
| |
| inline uintptr_t ZAddress::good(uintptr_t value) { |
| return address(offset(value) | ZAddressGoodMask); |
| } |
| |
| inline uintptr_t ZAddress::good_or_null(uintptr_t value) { |
| return is_null(value) ? 0 : good(value); |
| } |
| |
| inline uintptr_t ZAddress::finalizable_good(uintptr_t value) { |
| return address(offset(value) | ZAddressMetadataFinalizable | ZAddressGoodMask); |
| } |
| |
| inline uintptr_t ZAddress::marked(uintptr_t value) { |
| return address(offset(value) | ZAddressMetadataMarked); |
| } |
| |
| inline uintptr_t ZAddress::marked0(uintptr_t value) { |
| return address(offset(value) | ZAddressMetadataMarked0); |
| } |
| |
| inline uintptr_t ZAddress::marked1(uintptr_t value) { |
| return address(offset(value) | ZAddressMetadataMarked1); |
| } |
| |
| inline uintptr_t ZAddress::remapped(uintptr_t value) { |
| return address(offset(value) | ZAddressMetadataRemapped); |
| } |
| |
| inline uintptr_t ZAddress::remapped_or_null(uintptr_t value) { |
| return is_null(value) ? 0 : remapped(value); |
| } |
| |
| #endif // SHARE_GC_Z_ZADDRESS_INLINE_HPP |