231 lines
6.0 KiB
C++
231 lines
6.0 KiB
C++
/*
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* Copyright (C) 2016-2021 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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#include "DebugHeap.h"
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#include "Algorithm.h"
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#include "BAssert.h"
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#include "BPlatform.h"
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#include "VMAllocate.h"
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#include <cstdlib>
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#include <thread>
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#if BENABLE(LIBPAS)
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#include "pas_debug_heap.h"
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#endif
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namespace bmalloc {
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DebugHeap* debugHeapCache { nullptr };
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DEFINE_STATIC_PER_PROCESS_STORAGE(DebugHeap);
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#if BOS(DARWIN)
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DebugHeap::DebugHeap(const LockHolder&)
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: m_zone(malloc_create_zone(0, 0))
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, m_pageSize(vmPageSize())
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{
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malloc_set_zone_name(m_zone, "WebKit Using System Malloc");
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}
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void* DebugHeap::malloc(size_t size, FailureAction action)
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{
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void* result = malloc_zone_malloc(m_zone, size);
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RELEASE_BASSERT(action == FailureAction::ReturnNull || result);
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return result;
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}
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void* DebugHeap::memalign(size_t alignment, size_t size, FailureAction action)
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{
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void* result = malloc_zone_memalign(m_zone, alignment, size);
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RELEASE_BASSERT(action == FailureAction::ReturnNull || result);
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return result;
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}
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void* DebugHeap::realloc(void* object, size_t size, FailureAction action)
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{
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void* result = malloc_zone_realloc(m_zone, object, size);
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RELEASE_BASSERT(action == FailureAction::ReturnNull || result);
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return result;
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}
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void DebugHeap::free(void* object)
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{
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malloc_zone_free(m_zone, object);
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}
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void DebugHeap::scavenge()
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{
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// Currently |goal| does not affect on the behavior of malloc_zone_pressure_relief if (1) we only scavenge one zone and (2) it is not nanomalloc.
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constexpr size_t goal = 0;
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malloc_zone_pressure_relief(m_zone, goal);
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}
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void DebugHeap::dump()
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{
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constexpr bool verbose = true;
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malloc_zone_print(m_zone, verbose);
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}
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#else
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DebugHeap::DebugHeap(const LockHolder&)
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: m_pageSize(vmPageSize())
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{
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}
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void* DebugHeap::malloc(size_t size, FailureAction action)
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{
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void* result = ::malloc(size);
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RELEASE_BASSERT(action == FailureAction::ReturnNull || result);
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return result;
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}
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void* DebugHeap::memalign(size_t alignment, size_t size, FailureAction action)
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{
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void* result;
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if (posix_memalign(&result, alignment, size))
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RELEASE_BASSERT(action == FailureAction::ReturnNull || result);
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return result;
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}
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void* DebugHeap::realloc(void* object, size_t size, FailureAction action)
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{
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void* result = ::realloc(object, size);
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RELEASE_BASSERT(action == FailureAction::ReturnNull || result);
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return result;
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}
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void DebugHeap::free(void* object)
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{
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::free(object);
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}
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void DebugHeap::scavenge()
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{
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}
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void DebugHeap::dump()
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{
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}
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#endif
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// FIXME: This looks an awful lot like the code in wtf/Gigacage.cpp for large allocation.
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// https://bugs.webkit.org/show_bug.cgi?id=175086
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void* DebugHeap::memalignLarge(size_t alignment, size_t size)
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{
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alignment = roundUpToMultipleOf(m_pageSize, alignment);
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size = roundUpToMultipleOf(m_pageSize, size);
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void* result = tryVMAllocate(alignment, size);
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if (!result)
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return nullptr;
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{
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LockHolder locker(mutex());
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m_sizeMap[result] = size;
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}
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return result;
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}
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void DebugHeap::freeLarge(void* base)
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{
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if (!base)
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return;
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size_t size;
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{
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LockHolder locker(mutex());
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size = m_sizeMap[base];
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size_t numErased = m_sizeMap.erase(base);
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RELEASE_BASSERT(numErased == 1);
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}
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vmDeallocate(base, size);
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}
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DebugHeap* DebugHeap::tryGetSlow()
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{
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DebugHeap* result;
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if (Environment::get()->isDebugHeapEnabled()) {
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debugHeapCache = DebugHeap::get();
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result = debugHeapCache;
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} else {
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debugHeapCache = debugHeapDisabled();
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result = nullptr;
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}
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RELEASE_BASSERT(debugHeapCache);
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return result;
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}
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} // namespace bmalloc
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#if BENABLE(LIBPAS)
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// FIXME: Currently, we only use libpas for executable allocator. Thus libpas allocator is always enabled even when Malloc=1 is specified.
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// To make it work, we disable debug heap for libpas completely. We need additional code to enable libpas only for executable allocator when
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// Malloc=1 is specified when bmalloc is replaced with libpas.
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bool pas_debug_heap_is_enabled(void)
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{
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return false;
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}
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void* pas_debug_heap_malloc(size_t size)
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{
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BUNUSED_PARAM(size);
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RELEASE_BASSERT_NOT_REACHED();
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return nullptr;
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}
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void* pas_debug_heap_memalign(size_t alignment, size_t size)
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{
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BUNUSED_PARAM(size);
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BUNUSED_PARAM(alignment);
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RELEASE_BASSERT_NOT_REACHED();
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return nullptr;
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}
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void* pas_debug_heap_realloc(void* ptr, size_t size)
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{
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BUNUSED_PARAM(ptr);
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BUNUSED_PARAM(size);
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RELEASE_BASSERT_NOT_REACHED();
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return nullptr;
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}
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wmissing-noreturn"
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void pas_debug_heap_free(void* ptr)
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{
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BUNUSED_PARAM(ptr);
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RELEASE_BASSERT_NOT_REACHED();
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}
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#pragma clang diagnostic pop
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#endif // BENABLE(LIBPAS)
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