| //===-- sanitizer_stackdepot.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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is shared between AddressSanitizer and ThreadSanitizer |
| // run-time libraries. |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef SANITIZER_STACKDEPOT_H |
| #define SANITIZER_STACKDEPOT_H |
| |
| #include "sanitizer_common.h" |
| #include "sanitizer_internal_defs.h" |
| #include "sanitizer_stacktrace.h" |
| |
| namespace __sanitizer { |
| |
| // StackDepot efficiently stores huge amounts of stack traces. |
| struct StackDepotNode; |
| struct StackDepotHandle { |
| StackDepotNode *node_; |
| StackDepotHandle() : node_(nullptr) {} |
| explicit StackDepotHandle(StackDepotNode *node) : node_(node) {} |
| bool valid() { return node_; } |
| u32 id(); |
| int use_count(); |
| void inc_use_count_unsafe(); |
| }; |
| |
| const int kStackDepotMaxUseCount = 1U << (SANITIZER_ANDROID ? 16 : 20); |
| |
| StackDepotStats *StackDepotGetStats(); |
| u32 StackDepotPut(StackTrace stack); |
| StackDepotHandle StackDepotPut_WithHandle(StackTrace stack); |
| // Retrieves a stored stack trace by the id. |
| StackTrace StackDepotGet(u32 id); |
| |
| void StackDepotLockAll(); |
| void StackDepotUnlockAll(); |
| void StackDepotPrintAll(); |
| |
| // Instantiating this class creates a snapshot of StackDepot which can be |
| // efficiently queried with StackDepotGet(). You can use it concurrently with |
| // StackDepot, but the snapshot is only guaranteed to contain those stack traces |
| // which were stored before it was instantiated. |
| class StackDepotReverseMap { |
| public: |
| StackDepotReverseMap(); |
| StackTrace Get(u32 id); |
| |
| private: |
| struct IdDescPair { |
| u32 id; |
| StackDepotNode *desc; |
| |
| static bool IdComparator(const IdDescPair &a, const IdDescPair &b); |
| }; |
| |
| InternalMmapVector<IdDescPair> map_; |
| |
| // Disallow evil constructors. |
| StackDepotReverseMap(const StackDepotReverseMap&); |
| void operator=(const StackDepotReverseMap&); |
| }; |
| |
| } // namespace __sanitizer |
| |
| #endif // SANITIZER_STACKDEPOT_H |