1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/zero/vm/stack_zero.inline.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,56 @@
1.4 +/*
1.5 + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright 2010 Red Hat, Inc.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + *
1.27 + */
1.28 +
1.29 +#ifndef CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
1.30 +#define CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
1.31 +
1.32 +#include "runtime/thread.hpp"
1.33 +#include "stack_zero.hpp"
1.34 +
1.35 +// This function should match SharkStack::CreateStackOverflowCheck
1.36 +inline void ZeroStack::overflow_check(int required_words, TRAPS) {
1.37 + // Check the Zero stack
1.38 + if (available_words() < required_words) {
1.39 + handle_overflow(THREAD);
1.40 + return;
1.41 + }
1.42 +
1.43 + // Check the ABI stack
1.44 + if (abi_stack_available(THREAD) < 0) {
1.45 + handle_overflow(THREAD);
1.46 + return;
1.47 + }
1.48 +}
1.49 +
1.50 +// This method returns the amount of ABI stack available for us
1.51 +// to use under normal circumstances. Note that the returned
1.52 +// value can be negative.
1.53 +inline int ZeroStack::abi_stack_available(Thread *thread) const {
1.54 + int stack_used = thread->stack_base() - (address) &stack_used;
1.55 + int stack_free = thread->stack_size() - stack_used;
1.56 + return stack_free - shadow_pages_size();
1.57 +}
1.58 +
1.59 +#endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
