Mercurial > hg > graal-compiler
diff src/share/vm/services/memPtr.cpp @ 6197:d2a62e0f25eb
6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain
author | zgu |
---|---|
date | Thu, 28 Jun 2012 17:03:16 -0400 |
parents | |
children | e5bf1c79ed5b |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/services/memPtr.cpp Thu Jun 28 17:03:16 2012 -0400 @@ -0,0 +1,74 @@ +/* + * 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; + } +}