191 lines
6.2 KiB
C++
191 lines
6.2 KiB
C++
/*
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* Copyright (C) 2017-2018 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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#include "Environment.h"
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#include "IsoHeapImpl.h"
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#include "IsoMallocFallback.h"
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#include "IsoTLS.h"
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#include "bmalloc.h"
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#if BOS(DARWIN)
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#include <malloc/malloc.h>
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#endif
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namespace bmalloc {
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template<typename Type>
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void* IsoTLS::allocate(api::IsoHeap<Type>& handle, bool abortOnFailure)
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{
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return allocateImpl<typename api::IsoHeap<Type>::Config>(handle, abortOnFailure);
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}
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template<typename Type>
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void IsoTLS::deallocate(api::IsoHeap<Type>& handle, void* p)
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{
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if (!p)
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return;
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deallocateImpl<typename api::IsoHeap<Type>::Config>(handle, p);
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}
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template<typename Type>
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void IsoTLS::scavenge(api::IsoHeap<Type>& handle)
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{
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IsoTLS* tls = get();
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if (!tls)
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return;
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if (!handle.isInitialized())
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return;
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unsigned offset = handle.allocatorOffset();
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if (offset < tls->m_extent)
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reinterpret_cast<IsoAllocator<typename api::IsoHeap<Type>::Config>*>(tls->m_data + offset)->scavenge(handle.impl());
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offset = handle.deallocatorOffset();
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if (offset < tls->m_extent)
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reinterpret_cast<IsoDeallocator<typename api::IsoHeap<Type>::Config>*>(tls->m_data + offset)->scavenge();
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handle.impl().scavengeNow();
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}
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template<typename Config, typename Type>
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void* IsoTLS::allocateImpl(api::IsoHeap<Type>& handle, bool abortOnFailure)
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{
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unsigned offset = handle.allocatorOffset();
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IsoTLS* tls = get();
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if (!tls || offset >= tls->m_extent)
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return allocateSlow<Config>(handle, abortOnFailure);
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return tls->allocateFast<Config>(handle, offset, abortOnFailure);
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}
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template<typename Config, typename Type>
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void* IsoTLS::allocateFast(api::IsoHeap<Type>& handle, unsigned offset, bool abortOnFailure)
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{
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return reinterpret_cast<IsoAllocator<Config>*>(m_data + offset)->allocate(handle.impl(), abortOnFailure);
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}
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template<typename Config, typename Type>
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BNO_INLINE void* IsoTLS::allocateSlow(api::IsoHeap<Type>& handle, bool abortOnFailure)
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{
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IsoMallocFallback::MallocResult fallbackResult = IsoMallocFallback::tryMalloc(
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Config::objectSize
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#if BENABLE_MALLOC_HEAP_BREAKDOWN
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, handle.m_zone
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#endif
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);
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if (fallbackResult.didFallBack)
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return fallbackResult.ptr;
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// If debug heap is enabled, IsoMallocFallback::mallocFallbackState becomes MallocFallbackState::FallBackToMalloc.
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BASSERT(!Environment::get()->isDebugHeapEnabled());
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IsoTLS* tls = ensureHeapAndEntries(handle);
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return tls->allocateFast<Config>(handle, handle.allocatorOffset(), abortOnFailure);
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}
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template<typename Config, typename Type>
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void IsoTLS::deallocateImpl(api::IsoHeap<Type>& handle, void* p)
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{
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unsigned offset = handle.deallocatorOffset();
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IsoTLS* tls = get();
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// Note that this bounds check would be here even if we didn't have to support DebugHeap,
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// since we don't want unpredictable behavior if offset or m_extent ever got corrupted.
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if (!tls || offset >= tls->m_extent)
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deallocateSlow<Config>(handle, p);
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else
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tls->deallocateFast<Config>(handle, offset, p);
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}
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template<typename Config, typename Type>
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void IsoTLS::deallocateFast(api::IsoHeap<Type>& handle, unsigned offset, void* p)
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{
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reinterpret_cast<IsoDeallocator<Config>*>(m_data + offset)->deallocate(handle, p);
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}
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template<typename Config, typename Type>
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BNO_INLINE void IsoTLS::deallocateSlow(api::IsoHeap<Type>& handle, void* p)
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{
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bool result = IsoMallocFallback::tryFree(
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p
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#if BENABLE_MALLOC_HEAP_BREAKDOWN
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, handle.m_zone
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#endif
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);
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if (result)
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return;
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// If debug heap is enabled, IsoMallocFallback::mallocFallbackState becomes MallocFallbackState::FallBackToMalloc.
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BASSERT(!Environment::get()->isDebugHeapEnabled());
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RELEASE_BASSERT(handle.isInitialized());
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IsoTLS* tls = ensureEntries(std::max(handle.allocatorOffset(), handle.deallocatorOffset()));
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tls->deallocateFast<Config>(handle, handle.deallocatorOffset(), p);
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}
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inline IsoTLS* IsoTLS::get()
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{
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#if HAVE_PTHREAD_MACHDEP_H
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return static_cast<IsoTLS*>(_pthread_getspecific_direct(tlsKey));
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#else
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if (!s_didInitialize)
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return nullptr;
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return static_cast<IsoTLS*>(pthread_getspecific(s_tlsKey));
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#endif
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}
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inline void IsoTLS::set(IsoTLS* tls)
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{
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#if HAVE_PTHREAD_MACHDEP_H
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_pthread_setspecific_direct(tlsKey, tls);
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#else
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pthread_setspecific(s_tlsKey, tls);
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#endif
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}
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template<typename Type>
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void IsoTLS::ensureHeap(api::IsoHeap<Type>& handle)
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{
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if (!handle.isInitialized()) {
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LockHolder locker(handle.m_initializationLock);
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if (!handle.isInitialized())
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handle.initialize();
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}
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}
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template<typename Type>
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BNO_INLINE IsoTLS* IsoTLS::ensureHeapAndEntries(api::IsoHeap<Type>& handle)
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{
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RELEASE_BASSERT(
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!get()
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|| handle.allocatorOffset() >= get()->m_extent
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|| handle.deallocatorOffset() >= get()->m_extent);
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ensureHeap(handle);
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return ensureEntries(std::max(handle.allocatorOffset(), handle.deallocatorOffset()));
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}
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} // namespace bmalloc
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