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PojavLauncherTeam
GitHub Repository: PojavLauncherTeam/mobile
 Path: blob/master/src/hotspot/cpu/zero/stack_zero.inline.hpp
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/*

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 * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved.

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 * Copyright 2010 Red Hat, Inc.

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * This code is free software; you can redistribute it and/or modify it

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 * under the terms of the GNU General Public License version 2 only, as

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 * published by the Free Software Foundation.

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 *

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 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 * version 2 for more details (a copy is included in the LICENSE file that

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 * accompanied this code).

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 *

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 * You should have received a copy of the GNU General Public License version

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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 *

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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * or visit www.oracle.com if you need additional information or have any

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 * questions.

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 *

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 */

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#ifndef CPU_ZERO_STACK_ZERO_INLINE_HPP

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#define CPU_ZERO_STACK_ZERO_INLINE_HPP

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#include "runtime/thread.hpp"

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#include "stack_zero.hpp"

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inline void ZeroStack::overflow_check(int required_words, TRAPS) {

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  // Check the Zero stack

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  if (available_words() < required_words) {

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    handle_overflow(THREAD);

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    return;

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  }

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  // Check the ABI stack

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  if (abi_stack_available(THREAD) < 0) {

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    handle_overflow(THREAD);

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    return;

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  }

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}

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// This method returns the amount of ABI stack available for us

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// to use under normal circumstances.  Note that the returned

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// value can be negative.

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inline int ZeroStack::abi_stack_available(Thread *thread) const {

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  assert(Thread::current() == thread, "should run in the same thread");

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  int stack_used = thread->stack_base() - (address) &stack_used

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    + (StackOverflow::stack_guard_zone_size() + StackOverflow::stack_shadow_zone_size());

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  int stack_free = thread->stack_size() - stack_used;

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  return stack_free;

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}

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#endif // CPU_ZERO_STACK_ZERO_INLINE_HPP

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