compiler-rt/lib/sanitizer_common/sanitizer_stackdepot.h

   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 StackDepotLockBeforeFork();
  43 void StackDepotUnlockAfterFork(bool fork_child);
  44 void StackDepotPrintAll();
  45 void StackDepotStopBackgroundThread();
  46
  47 void StackDepotTestOnlyUnmap();
  48
  49 } // namespace __sanitizer
  50
  51 #endif // SANITIZER_STACKDEPOT_H