| // Copyright 2022 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_ALLOCATOR_PARTITION_ALLOCATOR_PARTITION_TAG_TYPES_H_ |
| #define BASE_ALLOCATOR_PARTITION_ALLOCATOR_PARTITION_TAG_TYPES_H_ |
| |
| #include <cstdint> |
| |
| // This header defines the types for MTECheckedPtr. Canonical |
| // documentation available at `//base/memory/raw_ptr_mtecheckedptr.md`. |
| |
| namespace partition_alloc { |
| |
| // Use 8 bits for the partition tag. This is the "lower" byte of the |
| // two top bytes in a 64-bit pointer. The "upper" byte of the same |
| // is reserved for true ARM MTE. |
| // |
| // MTECheckedPtr is not yet compatible with ARM MTE, but it is a |
| // distant goal to have them coexist. |
| using PartitionTag = uint8_t; |
| |
| } // namespace partition_alloc |
| |
| #endif // BASE_ALLOCATOR_PARTITION_ALLOCATOR_PARTITION_TAG_TYPES_H_ |
