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
stack_depot_init(void)36 static inline int stack_depot_init(void)
37 {
38 return 0;
39 }
40 #endif /* CONFIG_STACKDEPOT */
41
42 #endif
43