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/*
* Copyright (C) 2021-2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
// Require that HAVE(TYPE_AWARE_MALLOC) from PlatformHave.h is enabled when
// _MALLOC_TYPE_ENABLED is true.
#if defined __has_include && __has_include(<malloc/malloc.h>)
#include <malloc/malloc.h>
#endif
#if USE(APPLE_INTERNAL_SDK) // FIXME: Remove when OS 26 or later is oldest supported OS.
#if !HAVE(TYPE_AWARE_MALLOC) && (defined(_MALLOC_TYPE_ENABLED) && _MALLOC_TYPE_ENABLED)
#error _MALLOC_TYPE_ENABLED is enabled without HAVE_TYPE_AWARE_MALLOC
#endif
#endif
#if PLATFORM(MAC) || PLATFORM(IOS_FAMILY)
// Probabilistic Guard Malloc is not really enabled on older platforms but opt those to system malloc too for consistency.
#define HAVE_PROBABILISTIC_GUARD_MALLOC 1
#endif
namespace WTF {
// Non-template tag type for compatibility with MallocSpan.
struct SystemMalloc { };
template<typename T>
struct SystemMallocBase {
static T* malloc(size_t size)
{
T* result = static_cast<T*>(::malloc(size));
if (!result)
CRASH();
return result;
}
static T* tryMalloc(size_t size)
{
return static_cast<T*>(::malloc(size));
}
static T* zeroedMalloc(size_t size)
{
T* result = static_cast<T*>(::malloc(size));
if (!result)
CRASH();
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
memset(result, 0, size);
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
return result;
}
static T* tryZeroedMalloc(size_t size)
{
T* result = static_cast<T*>(::malloc(size));
if (!result)
return nullptr;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
memset(result, 0, size);
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
return result;
}
static T* realloc(void* p, size_t size)
{
T* result = static_cast<T*>(::realloc(p, size));
if (!result)
CRASH();
return result;
}
static T* tryRealloc(void* p, size_t size)
{
return static_cast<T*>(::realloc(p, size));
}
static void free(void* p)
{
::free(p);
}
static constexpr ALWAYS_INLINE size_t nextCapacity(size_t capacity)
{
return capacity + capacity / 4 + 1;
}
};
#if HAVE(PROBABILISTIC_GUARD_MALLOC)
using ProbabilisticGuardMalloc = SystemMalloc;
#endif
}
using WTF::SystemMalloc;
using WTF::SystemMallocBase;
#if HAVE(PROBABILISTIC_GUARD_MALLOC)
using WTF::ProbabilisticGuardMalloc;
#endif
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