| /* |
| * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2010 Red Hat, Inc. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef CPU_ZERO_VM_STACK_ZERO_INLINE_HPP |
| #define CPU_ZERO_VM_STACK_ZERO_INLINE_HPP |
| |
| #include "runtime/thread.hpp" |
| #include "stack_zero.hpp" |
| |
| // This function should match SharkStack::CreateStackOverflowCheck |
| inline void ZeroStack::overflow_check(int required_words, TRAPS) { |
| // Check the Zero stack |
| if (available_words() < required_words) { |
| handle_overflow(THREAD); |
| return; |
| } |
| |
| // Check the ABI stack |
| if (abi_stack_available(THREAD) < 0) { |
| handle_overflow(THREAD); |
| return; |
| } |
| } |
| |
| // This method returns the amount of ABI stack available for us |
| // to use under normal circumstances. Note that the returned |
| // value can be negative. |
| inline int ZeroStack::abi_stack_available(Thread *thread) const { |
| guarantee(Thread::current() == thread, "should run in the same thread"); |
| int stack_used = thread->stack_base() - (address) &stack_used |
| + (JavaThread::stack_guard_zone_size() + JavaThread::stack_shadow_zone_size()); |
| int stack_free = thread->stack_size() - stack_used; |
| return stack_free; |
| } |
| |
| #endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP |