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62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
/*
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* Copyright (c) 1999, 2022, 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 OS_BSD_OS_BSD_INLINE_HPP
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#define OS_BSD_OS_BSD_INLINE_HPP
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#include "os_bsd.hpp"
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#include "runtime/os.hpp"
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#include "os_posix.inline.hpp"
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inline bool os::zero_page_read_protected() {
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return true;
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}
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inline bool os::uses_stack_guard_pages() {
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return true;
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}
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inline bool os::must_commit_stack_guard_pages() {
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assert(uses_stack_guard_pages(), "sanity check");
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#if !defined(__FreeBSD__) || __FreeBSD__ < 5
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// Since FreeBSD 4 uses malloc() for allocating the thread stack
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// there is no need to do anything extra to allocate the guard pages
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return false;
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#else
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// FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
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// Must 'allocate' them or guard pages are ignored.
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return true;
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#endif
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}
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// Bang the shadow pages if they need to be touched to be mapped.
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inline void os::map_stack_shadow_pages(address sp) {
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}
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// Trim-native support, stubbed out for now, may be enabled later
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inline bool os::can_trim_native_heap() { return false; }
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inline bool os::trim_native_heap(os::size_change_t* rss_change) { return false; }
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#endif // OS_BSD_OS_BSD_INLINE_HPP
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