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/*
* Copyright (c) 2022 SAP SE. All rights reserved.
* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
* 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 OS_POSIX_SAFEFETCH_SIGJMP_HPP
#define OS_POSIX_SAFEFETCH_SIGJMP_HPP
#include "utilities/globalDefinitions.hpp"
// On Posix platforms that don't do anything better - or cannot, like Zero -
// SafeFetch is implemented using setjmp/longjmp. That is reliable and portable,
// but slower than other methods, and needs more thread stack (the sigjmp buffer
// lives on the thread stack).
int SafeFetch32_impl(int* adr, int errValue);
intptr_t SafeFetchN_impl(intptr_t* adr, intptr_t errValue);
// Handle safefetch, sigsetjmp style. Only call from signal handler.
// If a safefetch jump had been established and the sig qualifies, we
// jump back to the established jump point (and hence out of signal handling).
bool handle_safefetch(int sig, address pc, void* context);
#endif // OS_POSIX_SAFEFETCH_SIGJMP_HPP
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