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1 /*
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2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
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22 * have any questions.
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23 *
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24 */
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25
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26 // This function should match SharkStack::CreateStackOverflowCheck
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27 inline void ZeroStack::overflow_check(int required_words, TRAPS) {
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28 JavaThread *thread = (JavaThread *) THREAD;
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29
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30 // Check the Zero stack
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31 if (required_words > available_words()) {
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32 handle_overflow(THREAD);
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33 return;
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34 }
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35
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36 // Check the ABI stack
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37 address stack_top = thread->stack_base() - thread->stack_size();
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38 int free_stack = ((address) &stack_top) - stack_top;
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39 if (free_stack < shadow_pages_size()) {
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40 handle_overflow(THREAD);
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41 return;
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42 }
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43 }
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