include/linux/stackdepot.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * A generic stack depot implementation
   4  *
   5  * Author: Alexander Potapenko <glider@google.com>
   6  * Copyright (C) 2016 Google, Inc.
   7  *
   8  * Based on code by Dmitry Chernenkov.
   9  */
  10
  11 #ifndef _LINUX_STACKDEPOT_H
  12 #define _LINUX_STACKDEPOT_H
  13
  14 #include <linux/gfp.h>
  15
  16 typedef u32 depot_stack_handle_t;
  17
  18 depot_stack_handle_t __stack_depot_save(unsigned long *entries,
  19                                         unsigned int nr_entries,
  20                                         gfp_t gfp_flags, bool can_alloc);
  21
  22 depot_stack_handle_t stack_depot_save(unsigned long *entries,
  23                                       unsigned int nr_entries, gfp_t gfp_flags);
  24
  25 unsigned int stack_depot_fetch(depot_stack_handle_t handle,
  26                                unsigned long **entries);
  27
  28 int stack_depot_snprint(depot_stack_handle_t handle, char *buf, size_t size,
  29                        int spaces);
  30
  31 void stack_depot_print(depot_stack_handle_t stack);
  32
  33 #ifdef CONFIG_STACKDEPOT
  34 int stack_depot_init(void);
  35 #else
  36 static inline int stack_depot_init(void)
  37 {
  38         return 0;
  39 }
  40 #endif  /* CONFIG_STACKDEPOT */
  41
  42 #endif