0N/A/*
0N/A * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * Copyright 2010 Red Hat, Inc.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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0N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/A#ifndef CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
0N/A#define CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
0N/A
0N/A#include "runtime/thread.hpp"
0N/A#include "stack_zero.hpp"
0N/A
0N/A// This function should match SharkStack::CreateStackOverflowCheck
0N/Ainline void ZeroStack::overflow_check(int required_words, TRAPS) {
0N/A // Check the Zero stack
0N/A if (available_words() < required_words) {
0N/A handle_overflow(THREAD);
0N/A return;
0N/A }
0N/A
0N/A // Check the ABI stack
0N/A if (abi_stack_available(THREAD) < 0) {
0N/A handle_overflow(THREAD);
0N/A return;
0N/A }
0N/A}
0N/A
0N/A// This method returns the amount of ABI stack available for us
0N/A// to use under normal circumstances. Note that the returned
0N/A// value can be negative.
0N/Ainline int ZeroStack::abi_stack_available(Thread *thread) const {
0N/A int stack_used = thread->stack_base() - (address) &stack_used;
0N/A int stack_free = thread->stack_size() - stack_used;
0N/A return stack_free - shadow_pages_size();
0N/A}
0N/A
0N/A#endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
0N/A