1 | //===-- sanitizer_chained_origin_depot.h ------------------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // A storage for chained origins. |
10 | //===----------------------------------------------------------------------===// |
11 | |
12 | #ifndef SANITIZER_CHAINED_ORIGIN_DEPOT_H |
13 | #define SANITIZER_CHAINED_ORIGIN_DEPOT_H |
14 | |
15 | #include "sanitizer_common.h" |
16 | |
17 | namespace __sanitizer { |
18 | |
19 | class ChainedOriginDepot { |
20 | public: |
21 | ChainedOriginDepot(); |
22 | |
23 | // Gets the statistic of the origin chain storage. |
24 | StackDepotStats GetStats() const; |
25 | |
26 | // Stores a chain with StackDepot ID here_id and previous chain ID prev_id. |
27 | // If successful, returns true and the new chain id new_id. |
28 | // If the same element already exists, returns false and sets new_id to the |
29 | // existing ID. |
30 | bool Put(u32 here_id, u32 prev_id, u32 *new_id); |
31 | |
32 | // Retrieves the stored StackDepot ID for the given origin ID. |
33 | u32 Get(u32 id, u32 *other); |
34 | |
35 | void LockBeforeFork(); |
36 | void UnlockAfterFork(bool fork_child); |
37 | void TestOnlyUnmap(); |
38 | |
39 | private: |
40 | ChainedOriginDepot(const ChainedOriginDepot &) = delete; |
41 | void operator=(const ChainedOriginDepot &) = delete; |
42 | }; |
43 | |
44 | } // namespace __sanitizer |
45 | |
46 | #endif // SANITIZER_CHAINED_ORIGIN_DEPOT_H |
47 | |