twisti@1818: /*
twisti@1818:  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
twisti@1818:  * Copyright 2010 Red Hat, Inc.
twisti@1818:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
twisti@1818:  *
twisti@1818:  * This code is free software; you can redistribute it and/or modify it
twisti@1818:  * under the terms of the GNU General Public License version 2 only, as
twisti@1818:  * published by the Free Software Foundation.
twisti@1818:  *
twisti@1818:  * This code is distributed in the hope that it will be useful, but WITHOUT
twisti@1818:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
twisti@1818:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
twisti@1818:  * version 2 for more details (a copy is included in the LICENSE file that
twisti@1818:  * accompanied this code).
twisti@1818:  *
twisti@1818:  * You should have received a copy of the GNU General Public License version
twisti@1818:  * 2 along with this work; if not, write to the Free Software Foundation,
twisti@1818:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
twisti@1818:  *
twisti@1818:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
twisti@1818:  * CA 95054 USA or visit www.sun.com if you need additional information or
twisti@1818:  * have any questions.
twisti@1818:  *
twisti@1818:  */
twisti@1818: 
twisti@1818: // This function should match SharkStack::CreateStackOverflowCheck
twisti@1818: inline void ZeroStack::overflow_check(int required_words, TRAPS) {
twisti@1818:   JavaThread *thread = (JavaThread *) THREAD;
twisti@1818: 
twisti@1818:   // Check the Zero stack
twisti@1818:   if (required_words > available_words()) {
twisti@1818:     handle_overflow(THREAD);
twisti@1818:     return;
twisti@1818:   }
twisti@1818: 
twisti@1818:   // Check the ABI stack
twisti@1818:   address stack_top = thread->stack_base() - thread->stack_size();
twisti@1818:   int free_stack = ((address) &stack_top) - stack_top;
twisti@1818:   if (free_stack < shadow_pages_size()) {
twisti@1818:     handle_overflow(THREAD);
twisti@1818:     return;
twisti@1818:   }
twisti@1818: }