allocator_config.def

//===-- allocator_config.def ------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines all the flags and types supported in Scudo. For optional
// flags and types, only explicitly define them when interested (i.e., unused
// optional flags or types can be skipped).

#ifndef BASE_REQUIRED_TEMPLATE_TYPE
#define BASE_REQUIRED_TEMPLATE_TYPE(...)
#endif
#ifndef BASE_OPTIONAL
#define BASE_OPTIONAL(...)
#endif
#ifndef PRIMARY_REQUIRED_TYPE
#define PRIMARY_REQUIRED_TYPE(...)
#endif
#ifndef PRIMARY_REQUIRED
#define PRIMARY_REQUIRED(...)
#endif
#ifndef PRIMARY_OPTIONAL
#define PRIMARY_OPTIONAL(...)
#endif
#ifndef PRIMARY_OPTIONAL_TYPE
#define PRIMARY_OPTIONAL_TYPE(...)
#endif
#ifndef SECONDARY_REQUIRED_TEMPLATE_TYPE
#define SECONDARY_REQUIRED_TEMPLATE_TYPE(...)
#endif
#ifndef SECONDARY_CACHE_OPTIONAL
#define SECONDARY_CACHE_OPTIONAL(...)
#endif

// BASE_REQUIRED_TEMPLATE_TYPE(NAME)
//
// Thread-Specific Data Registry used, shared or exclusive.
BASE_REQUIRED_TEMPLATE_TYPE(TSDRegistryT)

// Defines the type of Primary allocator to use.
BASE_REQUIRED_TEMPLATE_TYPE(PrimaryT)

// Defines the type of Secondary allocator to use.
BASE_REQUIRED_TEMPLATE_TYPE(SecondaryT)

// BASE_OPTIONAL(TYPE, NAME, DEFAULT)
//
// Indicates possible support for Memory Tagging.
BASE_OPTIONAL(const bool, MaySupportMemoryTagging, false)

// PRIMARY_REQUIRED_TYPE(NAME)
//
// SizeClassMap to use with the Primary.
PRIMARY_REQUIRED_TYPE(SizeClassMap)

// PRIMARY_REQUIRED(TYPE, NAME)
//
// Log2 of the size of a size class region, as used by the Primary.
PRIMARY_REQUIRED(const uptr, RegionSizeLog)

// Conceptually, a region will be divided into groups based on the address
// range. Each allocation consumes blocks in the same group until exhaustion
// then it pops out blocks in a new group. Therefore, `GroupSizeLog` is always
// smaller or equal to `RegionSizeLog`. Note that `GroupSizeLog` needs to be
// equal to `RegionSizeLog` for SizeClassAllocator32 because of certain
// constraints.
PRIMARY_REQUIRED(const uptr, GroupSizeLog)

// Call map for user memory with at least this size. Only used with primary64.
PRIMARY_REQUIRED(const uptr, MapSizeIncrement)

// Defines the minimal & maximal release interval that can be set.
PRIMARY_REQUIRED(const s32, MinReleaseToOsIntervalMs)
PRIMARY_REQUIRED(const s32, MaxReleaseToOsIntervalMs)

// PRIMARY_OPTIONAL(TYPE, NAME, DEFAULT)
//
// The scale of a compact pointer. E.g., Ptr = Base + (CompactPtr << Scale).
PRIMARY_OPTIONAL(const uptr, CompactPtrScale, SCUDO_MIN_ALIGNMENT_LOG)

// Indicates support for offsetting the start of a region by a random number of
// pages. This is only used if `EnableContiguousRegions` is enabled.
PRIMARY_OPTIONAL(const bool, EnableRandomOffset, false)
PRIMARY_OPTIONAL(const s32, DefaultReleaseToOsIntervalMs, INT32_MIN)

// When `EnableContiguousRegions` is true, all regions will be be arranged in
// adjacency. This will reduce the fragmentation caused by region allocations
// but may require a huge amount of contiguous pages at initialization.
PRIMARY_OPTIONAL(const bool, EnableContiguousRegions, true)

// PRIMARY_OPTIONAL_TYPE(NAME, DEFAULT)
//
// Use condition variable to shorten the waiting time of refillment of
// freelist. Note that this depends on the implementation of condition
// variable on each platform and the performance may vary so that it does not
// guarantee a performance benefit.
PRIMARY_OPTIONAL_TYPE(ConditionVariableT, ConditionVariableDummy)

// 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. See `CompactPtrScale` also.
PRIMARY_OPTIONAL_TYPE(CompactPtrT, uptr)

// SECONDARY_REQUIRED_TEMPLATE_TYPE(NAME)
//
// Defines the type of Secondary Cache to use.
SECONDARY_REQUIRED_TEMPLATE_TYPE(CacheT)

// SECONDARY_CACHE_OPTIONAL(TYPE, NAME, DEFAULT)
//
// Defines the type of cache used by the Secondary. Some additional
// configuration entries can be necessary depending on the Cache.
SECONDARY_CACHE_OPTIONAL(const u32, EntriesArraySize, 0)
SECONDARY_CACHE_OPTIONAL(const u32, QuarantineSize, 0)
SECONDARY_CACHE_OPTIONAL(const u32, DefaultMaxEntriesCount, 0)
SECONDARY_CACHE_OPTIONAL(const uptr, DefaultMaxEntrySize, 0)
SECONDARY_CACHE_OPTIONAL(const s32, MinReleaseToOsIntervalMs, INT32_MIN)
SECONDARY_CACHE_OPTIONAL(const s32, MaxReleaseToOsIntervalMs, INT32_MAX)
SECONDARY_CACHE_OPTIONAL(const s32, DefaultReleaseToOsIntervalMs, INT32_MIN)

#undef SECONDARY_CACHE_OPTIONAL
#undef SECONDARY_REQUIRED_TEMPLATE_TYPE
#undef PRIMARY_OPTIONAL_TYPE
#undef PRIMARY_OPTIONAL
#undef PRIMARY_REQUIRED
#undef PRIMARY_REQUIRED_TYPE
#undef BASE_OPTIONAL
#undef BASE_REQUIRED_TEMPLATE_TYPE