twisti@1818: /*
stefank@2314:  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
twisti@1818:  *
twisti@1818:  */
twisti@1818: 
stefank@2314: #ifndef CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
stefank@2314: #define CPU_ZERO_VM_STACK_ZERO_INLINE_HPP
stefank@2314: 
stefank@2314: #include "runtime/thread.hpp"
stefank@2314: #include "stack_zero.hpp"
stefank@2314: 
twisti@1818: // This function should match SharkStack::CreateStackOverflowCheck
twisti@1818: inline void ZeroStack::overflow_check(int required_words, TRAPS) {
twisti@1818:   // Check the Zero stack
twisti@1866:   if (available_words() < required_words) {
twisti@1818:     handle_overflow(THREAD);
twisti@1818:     return;
twisti@1818:   }
twisti@1818: 
twisti@1818:   // Check the ABI stack
twisti@1866:   if (abi_stack_available(THREAD) < 0) {
twisti@1818:     handle_overflow(THREAD);
twisti@1818:     return;
twisti@1818:   }
twisti@1818: }
twisti@1866: 
twisti@1866: // This method returns the amount of ABI stack available for us
twisti@1866: // to use under normal circumstances.  Note that the returned
twisti@1866: // value can be negative.
twisti@1866: inline int ZeroStack::abi_stack_available(Thread *thread) const {
simonis@7599:   guarantee(Thread::current() == thread, "should run in the same thread");
simonis@7599:   int stack_used = thread->stack_base() - (address) &stack_used
simonis@7599:     + (StackYellowPages+StackRedPages+StackShadowPages) * os::vm_page_size();
twisti@1866:   int stack_free = thread->stack_size() - stack_used;
simonis@7599:   return stack_free;
twisti@1866: }
stefank@2314: 
stefank@2314: #endif // CPU_ZERO_VM_STACK_ZERO_INLINE_HPP