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72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
/*
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* Copyright (c) 2023 SAP SE. All rights reserved.
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* Copyright (c) 2023, 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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*/
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#ifndef SHARE_NMT_MALLOCTRACKER_INLINE_HPP
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#define SHARE_NMT_MALLOCTRACKER_INLINE_HPP
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#include "nmt/mallocTracker.hpp"
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#include "services/mallocLimit.hpp"
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#include "utilities/debug.hpp"
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#include "utilities/globalDefinitions.hpp"
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// Returns true if allocating s bytes on f would trigger either global or the category limit
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inline bool MallocMemorySummary::check_exceeds_limit(size_t s, MEMFLAGS f) {
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// Note: checks are ordered to have as little impact as possible on the standard code path,
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// when MallocLimit is unset, resp. it is set but we have reached no limit yet.
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// Somewhat expensive are:
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// - as_snapshot()->total(), total malloc load (requires iteration over arena types)
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// - VMError::is_error_reported() is a load from a volatile.
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if (MallocLimitHandler::have_limit()) {
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// Global Limit ?
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const malloclimit* l = MallocLimitHandler::global_limit();
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if (l->sz > 0) {
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size_t so_far = as_snapshot()->total();
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if ((so_far + s) > l->sz) { // hit the limit
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return total_limit_reached(s, so_far, l);
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}
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} else {
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// Category Limit?
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l = MallocLimitHandler::category_limit(f);
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if (l->sz > 0) {
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const MallocMemory* mm = as_snapshot()->by_type(f);
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size_t so_far = mm->malloc_size() + mm->arena_size();
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if ((so_far + s) > l->sz) {
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return category_limit_reached(f, s, so_far, l);
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}
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}
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}
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}
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return false;
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}
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inline bool MallocTracker::check_exceeds_limit(size_t s, MEMFLAGS f) {
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return MallocMemorySummary::check_exceeds_limit(s, f);
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}
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#endif // SHARE_NMT_MALLOCTRACKER_INLINE_HPP
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