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 52