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1 //===-- sanitizer_stackdepot.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 // This file is shared between AddressSanitizer and ThreadSanitizer
10 // run-time libraries.
11 //===----------------------------------------------------------------------===//
12
13 #ifndef SANITIZER_STACKDEPOT_H
14 #define SANITIZER_STACKDEPOT_H
15
16 #include "sanitizer_common.h"
17 #include "sanitizer_internal_defs.h"
18 #include "sanitizer_stacktrace.h"
19
20 namespace __sanitizer {
21
22 // StackDepot efficiently stores huge amounts of stack traces.
23 struct StackDepotNode;
24 struct StackDepotHandle {
25   StackDepotNode *node_ = nullptr;
26   u32 id_ = 0;
27   StackDepotHandle(StackDepotNode *node, u32 id) : node_(node), id_(id) {}
28   bool valid() const { return node_; }
29   u32 id() const { return id_; }
30   int use_count() const;
31   void inc_use_count_unsafe();
32 };
33
34 const int kStackDepotMaxUseCount = 1U << (SANITIZER_ANDROID ? 16 : 20);
35
36 StackDepotStats StackDepotGetStats();
37 u32 StackDepotPut(StackTrace stack);
38 StackDepotHandle StackDepotPut_WithHandle(StackTrace stack);
39 // Retrieves a stored stack trace by the id.
40 StackTrace StackDepotGet(u32 id);
41
42 void StackDepotLockAll();
43 void StackDepotUnlockAll();
44 void StackDepotPrintAll();
45 void StackDepotStopBackgroundThread();
46
47 void StackDepotTestOnlyUnmap();
48
49 } // namespace __sanitizer
50
51 #endif // SANITIZER_STACKDEPOT_H