1/* 2 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2010 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#ifndef CPU_ZERO_VM_STACK_ZERO_INLINE_HPP 27#define CPU_ZERO_VM_STACK_ZERO_INLINE_HPP 28 29#include "runtime/thread.hpp" 30#include "stack_zero.hpp" 31 32// This function should match SharkStack::CreateStackOverflowCheck 33inline void ZeroStack::overflow_check(int required_words, TRAPS) { 34 // Check the Zero stack 35 if (available_words() < required_words) { 36 handle_overflow(THREAD); 37 return; 38 } 39 40 // Check the ABI stack 41 if (abi_stack_available(THREAD) < 0) { 42 handle_overflow(THREAD); 43 return; 44 } 45} 46 47// This method returns the amount of ABI stack available for us 48// to use under normal circumstances. Note that the returned 49// value can be negative. 50inline int ZeroStack::abi_stack_available(Thread *thread) const { 51 guarantee(Thread::current() == thread, "should run in the same thread"); 52 int stack_used = thread->stack_base() - (address) &stack_used 53 + (JavaThread::stack_guard_zone_size() + JavaThread::stack_shadow_zone_size()); 54 int stack_free = thread->stack_size() - stack_used; 55 return stack_free; 56} 57 58#endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP 59