mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if OS(DARWIN) && CPU(ARM64)
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#include <wtf/Platform.h>
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#if USE(PTHREAD_JIT_PERMISSIONS_API)
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#include <pthread.h>
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#elif USE(APPLE_INTERNAL_SDK)
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#include <os/thread_self_restrict.h>
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#endif
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static ALWAYS_INLINE bool useFastJITPermissions()
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{
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#if CPU(ARM64E)
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return true;
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#elif USE(PTHREAD_JIT_PERMISSIONS_API)
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return !!pthread_jit_write_protect_supported_np();
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#elif USE(APPLE_INTERNAL_SDK)
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return !!os_thread_self_restrict_rwx_is_supported();
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#else
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return false;
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#endif
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}
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static ALWAYS_INLINE void threadSelfRestrictRWXToRW()
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{
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ASSERT(useFastJITPermissions());
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#if USE(PTHREAD_JIT_PERMISSIONS_API)
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pthread_jit_write_protect_np(false);
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#elif USE(APPLE_INTERNAL_SDK)
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os_thread_self_restrict_rwx_to_rw();
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#else
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bool tautologyToIgnoreWarning = true;
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if (tautologyToIgnoreWarning)
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RELEASE_ASSERT_NOT_REACHED();
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#endif
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}
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static ALWAYS_INLINE void threadSelfRestrictRWXToRX()
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{
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ASSERT(useFastJITPermissions());
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#if USE(PTHREAD_JIT_PERMISSIONS_API)
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pthread_jit_write_protect_np(true);
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#elif USE(APPLE_INTERNAL_SDK)
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os_thread_self_restrict_rwx_to_rx();
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#else
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bool tautologyToIgnoreWarning = true;
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if (tautologyToIgnoreWarning)
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RELEASE_ASSERT_NOT_REACHED();
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#endif
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}
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#else // Not OS(DARWIN) && CPU(ARM64)
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constexpr bool fastJITPermissionsIsSupported()
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{
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return false;
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}
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constexpr bool useFastJITPermissions()
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{
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return false;
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}
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NO_RETURN_DUE_TO_CRASH ALWAYS_INLINE void threadSelfRestrictRWXToRW()
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{
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CRASH();
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}
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NO_RETURN_DUE_TO_CRASH ALWAYS_INLINE void threadSelfRestrictRWXToRX()
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{
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CRASH();
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}
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#endif // OS(DARWIN) && CPU(ARM64)
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