Mercurial > hg > graal-compiler
view src/share/vm/services/memPtr.cpp @ 6408:e5768e936147
Allow snippets to inherit the stateAfter and stamp from the replacee
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 14 Sep 2012 14:21:33 -0700 |
parents | d2a62e0f25eb |
children | e5bf1c79ed5b |
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/* * Copyright (c) 2012, 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 "precompiled.hpp" #include "services/memPtr.hpp" #include "services/memTracker.hpp" volatile jint SequenceGenerator::_seq_number = 1; DEBUG_ONLY(jint SequenceGenerator::_max_seq_number = 1;) DEBUG_ONLY(volatile unsigned long SequenceGenerator::_generation = 0;) jint SequenceGenerator::next() { jint seq = Atomic::add(1, &_seq_number); if (seq < 0) { MemTracker::shutdown(MemTracker::NMT_sequence_overflow); } assert(seq > 0, "counter overflow"); DEBUG_ONLY(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;) return seq; } bool VMMemRegion::contains(const VMMemRegion* mr) const { assert(base() != 0, "no base address"); assert(size() != 0 || committed_size() != 0, "no range"); address base_addr = base(); address end_addr = base_addr + (is_reserve_record()? reserved_size(): committed_size()); if (mr->is_reserve_record()) { if (mr->base() == base_addr && mr->size() == size()) { // the same range return true; } return false; } else if (mr->is_commit_record() || mr->is_uncommit_record()) { assert(mr->base() != 0 && mr->committed_size() > 0, "bad record"); return (mr->base() >= base_addr && (mr->base() + mr->committed_size()) <= end_addr); } else if (mr->is_type_tagging_record()) { assert(mr->base() != 0, "no base"); return mr->base() == base_addr; } else if (mr->is_release_record()) { assert(mr->base() != 0 && mr->size() > 0, "bad record"); return (mr->base() == base_addr && mr->size() == size()); } else { assert(false, "what happened?"); return false; } }