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annotate src/cpu/zero/vm/stack_zero.inline.hpp @ 21947:9f70fc90169d

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Truffle: remove expensive assertion
author Andreas Woess <andreas.woess@oracle.com>
date Wed, 17 Jun 2015 04:09:30 +0200
parents f95d63e2154a
children
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1 /*
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2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2010 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #ifndef CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
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27 #define CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
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28
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29 #include "runtime/thread.hpp"
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30 #include "stack_zero.hpp"
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31
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32 // This function should match SharkStack::CreateStackOverflowCheck
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33 inline void ZeroStack::overflow_check(int required_words, TRAPS) {
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34 // Check the Zero stack
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35 if (available_words() < required_words) {
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36 handle_overflow(THREAD);
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37 return;
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38 }
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39
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40 // Check the ABI stack
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41 if (abi_stack_available(THREAD) < 0) {
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42 handle_overflow(THREAD);
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43 return;
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44 }
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45 }
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46
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47 // This method returns the amount of ABI stack available for us
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48 // to use under normal circumstances. Note that the returned
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49 // value can be negative.
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50 inline int ZeroStack::abi_stack_available(Thread *thread) const {
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51 int stack_used = thread->stack_base() - (address) &stack_used;
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52 int stack_free = thread->stack_size() - stack_used;
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53 return stack_free - shadow_pages_size();
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54 }
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55
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56 #endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP