10b57cec5SDimitry Andric //===-- sanitizer_stackdepot.h ----------------------------------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file is shared between AddressSanitizer and ThreadSanitizer 100b57cec5SDimitry Andric // run-time libraries. 110b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric #ifndef SANITIZER_STACKDEPOT_H 140b57cec5SDimitry Andric #define SANITIZER_STACKDEPOT_H 150b57cec5SDimitry Andric 160b57cec5SDimitry Andric #include "sanitizer_common.h" 170b57cec5SDimitry Andric #include "sanitizer_internal_defs.h" 180b57cec5SDimitry Andric #include "sanitizer_stacktrace.h" 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric namespace __sanitizer { 210b57cec5SDimitry Andric 220b57cec5SDimitry Andric // StackDepot efficiently stores huge amounts of stack traces. 230b57cec5SDimitry Andric struct StackDepotNode; 240b57cec5SDimitry Andric struct StackDepotHandle { 25349cc55cSDimitry Andric StackDepotNode *node_ = nullptr; 26349cc55cSDimitry Andric u32 id_ = 0; StackDepotHandleStackDepotHandle27349cc55cSDimitry Andric StackDepotHandle(StackDepotNode *node, u32 id) : node_(node), id_(id) {} validStackDepotHandle28349cc55cSDimitry Andric bool valid() const { return node_; } idStackDepotHandle29349cc55cSDimitry Andric u32 id() const { return id_; } 30349cc55cSDimitry Andric int use_count() const; 310b57cec5SDimitry Andric void inc_use_count_unsafe(); 320b57cec5SDimitry Andric }; 330b57cec5SDimitry Andric 340b57cec5SDimitry Andric const int kStackDepotMaxUseCount = 1U << (SANITIZER_ANDROID ? 16 : 20); 350b57cec5SDimitry Andric 36349cc55cSDimitry Andric StackDepotStats StackDepotGetStats(); 370b57cec5SDimitry Andric u32 StackDepotPut(StackTrace stack); 380b57cec5SDimitry Andric StackDepotHandle StackDepotPut_WithHandle(StackTrace stack); 390b57cec5SDimitry Andric // Retrieves a stored stack trace by the id. 400b57cec5SDimitry Andric StackTrace StackDepotGet(u32 id); 410b57cec5SDimitry Andric 42*cb14a3feSDimitry Andric void StackDepotLockBeforeFork(); 43*cb14a3feSDimitry Andric void StackDepotUnlockAfterFork(bool fork_child); 44e8d8bef9SDimitry Andric void StackDepotPrintAll(); 450eae32dcSDimitry Andric void StackDepotStopBackgroundThread(); 460b57cec5SDimitry Andric 47349cc55cSDimitry Andric void StackDepotTestOnlyUnmap(); 480b57cec5SDimitry Andric 490b57cec5SDimitry Andric } // namespace __sanitizer 500b57cec5SDimitry Andric 510b57cec5SDimitry Andric #endif // SANITIZER_STACKDEPOT_H 52