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//===-- allocator_config.h --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef SCUDO_ALLOCATOR_CONFIG_H_
#define SCUDO_ALLOCATOR_CONFIG_H_
#include "combined.h"
#include "common.h"
#include "flags.h"
#include "primary32.h"
#include "primary64.h"
#include "secondary.h"
#include "size_class_map.h"
#include "tsd_exclusive.h"
#include "tsd_shared.h"
namespace scudo {
// The combined allocator uses a structure as a template argument that
// specifies the configuration options for the various subcomponents of the
// allocator.
//
// struct ExampleConfig {
// // SizeClasMmap to use with the Primary.
// using SizeClassMap = DefaultSizeClassMap;
// // Indicates possible support for Memory Tagging.
// static const bool MaySupportMemoryTagging = false;
// // Defines the Primary allocator to use.
// typedef SizeClassAllocator64<ExampleConfig> Primary;
// // Log2 of the size of a size class region, as used by the Primary.
// static const uptr PrimaryRegionSizeLog = 30U;
// // Defines the type and scale of a compact pointer. A compact pointer can
// // be understood as the offset of a pointer within the region it belongs
// // to, in increments of a power-of-2 scale.
// // eg: Ptr = Base + (CompactPtr << Scale).
// typedef u32 PrimaryCompactPtrT;
// static const uptr PrimaryCompactPtrScale = SCUDO_MIN_ALIGNMENT_LOG;
// // Indicates support for offsetting the start of a region by
// // a random number of pages. Only used with primary64.
// static const bool PrimaryEnableRandomOffset = true;
// // Call map for user memory with at least this size. Only used with
// // primary64.
// static const uptr PrimaryMapSizeIncrement = 1UL << 18;
// // Defines the minimal & maximal release interval that can be set.
// static const s32 PrimaryMinReleaseToOsIntervalMs = INT32_MIN;
// static const s32 PrimaryMaxReleaseToOsIntervalMs = INT32_MAX;
// // Defines the type of cache used by the Secondary. Some additional
// // configuration entries can be necessary depending on the Cache.
// typedef MapAllocatorNoCache SecondaryCache;
// // Thread-Specific Data Registry used, shared or exclusive.
// template <class A> using TSDRegistryT = TSDRegistrySharedT<A, 8U, 4U>;
// };
// Default configurations for various platforms.
struct DefaultConfig {
using SizeClassMap = DefaultSizeClassMap;
static const bool MaySupportMemoryTagging = true;
#if SCUDO_CAN_USE_PRIMARY64
typedef SizeClassAllocator64<DefaultConfig> Primary;
static const uptr PrimaryRegionSizeLog = 32U;
typedef uptr PrimaryCompactPtrT;
static const uptr PrimaryCompactPtrScale = 0;
static const bool PrimaryEnableRandomOffset = true;
static const uptr PrimaryMapSizeIncrement = 1UL << 18;
#else
typedef SizeClassAllocator32<DefaultConfig> Primary;
static const uptr PrimaryRegionSizeLog = 19U;
typedef uptr PrimaryCompactPtrT;
#endif
static const s32 PrimaryMinReleaseToOsIntervalMs = INT32_MIN;
static const s32 PrimaryMaxReleaseToOsIntervalMs = INT32_MAX;
typedef MapAllocatorCache<DefaultConfig> SecondaryCache;
static const u32 SecondaryCacheEntriesArraySize = 32U;
static const u32 SecondaryCacheQuarantineSize = 0U;
static const u32 SecondaryCacheDefaultMaxEntriesCount = 32U;
static const uptr SecondaryCacheDefaultMaxEntrySize = 1UL << 19;
static const s32 SecondaryCacheMinReleaseToOsIntervalMs = INT32_MIN;
static const s32 SecondaryCacheMaxReleaseToOsIntervalMs = INT32_MAX;
template <class A> using TSDRegistryT = TSDRegistryExT<A>; // Exclusive
};
struct AndroidConfig {
using SizeClassMap = AndroidSizeClassMap;
static const bool MaySupportMemoryTagging = true;
#if SCUDO_CAN_USE_PRIMARY64
typedef SizeClassAllocator64<AndroidConfig> Primary;
static const uptr PrimaryRegionSizeLog = 28U;
typedef u32 PrimaryCompactPtrT;
static const uptr PrimaryCompactPtrScale = SCUDO_MIN_ALIGNMENT_LOG;
static const bool PrimaryEnableRandomOffset = true;
static const uptr PrimaryMapSizeIncrement = 1UL << 18;
#else
typedef SizeClassAllocator32<AndroidConfig> Primary;
static const uptr PrimaryRegionSizeLog = 18U;
typedef uptr PrimaryCompactPtrT;
#endif
static const s32 PrimaryMinReleaseToOsIntervalMs = 1000;
static const s32 PrimaryMaxReleaseToOsIntervalMs = 1000;
typedef MapAllocatorCache<AndroidConfig> SecondaryCache;
static const u32 SecondaryCacheEntriesArraySize = 256U;
static const u32 SecondaryCacheQuarantineSize = 32U;
static const u32 SecondaryCacheDefaultMaxEntriesCount = 32U;
static const uptr SecondaryCacheDefaultMaxEntrySize = 2UL << 20;
static const s32 SecondaryCacheMinReleaseToOsIntervalMs = 0;
static const s32 SecondaryCacheMaxReleaseToOsIntervalMs = 1000;
template <class A>
using TSDRegistryT = TSDRegistrySharedT<A, 8U, 2U>; // Shared, max 8 TSDs.
};
struct AndroidSvelteConfig {
using SizeClassMap = SvelteSizeClassMap;
static const bool MaySupportMemoryTagging = false;
#if SCUDO_CAN_USE_PRIMARY64
typedef SizeClassAllocator64<AndroidSvelteConfig> Primary;
static const uptr PrimaryRegionSizeLog = 27U;
typedef u32 PrimaryCompactPtrT;
static const uptr PrimaryCompactPtrScale = SCUDO_MIN_ALIGNMENT_LOG;
static const bool PrimaryEnableRandomOffset = true;
static const uptr PrimaryMapSizeIncrement = 1UL << 18;
#else
typedef SizeClassAllocator32<AndroidSvelteConfig> Primary;
static const uptr PrimaryRegionSizeLog = 16U;
typedef uptr PrimaryCompactPtrT;
#endif
static const s32 PrimaryMinReleaseToOsIntervalMs = 1000;
static const s32 PrimaryMaxReleaseToOsIntervalMs = 1000;
typedef MapAllocatorCache<AndroidSvelteConfig> SecondaryCache;
static const u32 SecondaryCacheEntriesArraySize = 16U;
static const u32 SecondaryCacheQuarantineSize = 32U;
static const u32 SecondaryCacheDefaultMaxEntriesCount = 4U;
static const uptr SecondaryCacheDefaultMaxEntrySize = 1UL << 18;
static const s32 SecondaryCacheMinReleaseToOsIntervalMs = 0;
static const s32 SecondaryCacheMaxReleaseToOsIntervalMs = 0;
template <class A>
using TSDRegistryT = TSDRegistrySharedT<A, 2U, 1U>; // Shared, max 2 TSDs.
};
#if SCUDO_CAN_USE_PRIMARY64
struct FuchsiaConfig {
using SizeClassMap = FuchsiaSizeClassMap;
static const bool MaySupportMemoryTagging = false;
typedef SizeClassAllocator64<FuchsiaConfig> Primary;
static const uptr PrimaryRegionSizeLog = 30U;
typedef u32 PrimaryCompactPtrT;
static const bool PrimaryEnableRandomOffset = true;
static const uptr PrimaryMapSizeIncrement = 1UL << 18;
static const uptr PrimaryCompactPtrScale = SCUDO_MIN_ALIGNMENT_LOG;
static const s32 PrimaryMinReleaseToOsIntervalMs = INT32_MIN;
static const s32 PrimaryMaxReleaseToOsIntervalMs = INT32_MAX;
typedef MapAllocatorNoCache SecondaryCache;
template <class A>
using TSDRegistryT = TSDRegistrySharedT<A, 8U, 4U>; // Shared, max 8 TSDs.
};
struct TrustyConfig {
using SizeClassMap = TrustySizeClassMap;
static const bool MaySupportMemoryTagging = false;
typedef SizeClassAllocator64<TrustyConfig> Primary;
// Some apps have 1 page of heap total so small regions are necessary.
static const uptr PrimaryRegionSizeLog = 10U;
typedef u32 PrimaryCompactPtrT;
static const bool PrimaryEnableRandomOffset = false;
// Trusty is extremely memory-constrained so minimally round up map calls.
static const uptr PrimaryMapSizeIncrement = 1UL << 4;
static const uptr PrimaryCompactPtrScale = SCUDO_MIN_ALIGNMENT_LOG;
static const s32 PrimaryMinReleaseToOsIntervalMs = INT32_MIN;
static const s32 PrimaryMaxReleaseToOsIntervalMs = INT32_MAX;
typedef MapAllocatorNoCache SecondaryCache;
template <class A>
using TSDRegistryT = TSDRegistrySharedT<A, 1U, 1U>; // Shared, max 1 TSD.
};
#endif
#if SCUDO_ANDROID
typedef AndroidConfig Config;
#elif SCUDO_FUCHSIA
typedef FuchsiaConfig Config;
#elif SCUDO_TRUSTY
typedef TrustyConfig Config;
#else
typedef DefaultConfig Config;
#endif
} // namespace scudo
#endif // SCUDO_ALLOCATOR_CONFIG_H_
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