1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_STACKTRACE_H
3#define __LINUX_STACKTRACE_H
4
5#include <linux/types.h>
6
7struct task_struct;
8struct pt_regs;
9
10#ifdef CONFIG_STACKTRACE
11struct stack_trace {
12 unsigned int nr_entries, max_entries;
13 unsigned long *entries;
14 int skip; /* input argument: How many entries to skip */
15};
16
17extern void save_stack_trace(struct stack_trace *trace);
18extern void save_stack_trace_regs(struct pt_regs *regs,
19 struct stack_trace *trace);
20extern void save_stack_trace_tsk(struct task_struct *tsk,
21 struct stack_trace *trace);
22extern int save_stack_trace_tsk_reliable(struct task_struct *tsk,
23 struct stack_trace *trace);
24
25extern void print_stack_trace(struct stack_trace *trace, int spaces);
26extern int snprint_stack_trace(char *buf, size_t size,
27 struct stack_trace *trace, int spaces);
28
29#ifdef CONFIG_USER_STACKTRACE_SUPPORT
30extern void save_stack_trace_user(struct stack_trace *trace);
31#else
32# define save_stack_trace_user(trace) do { } while (0)
33#endif
34
35#else /* !CONFIG_STACKTRACE */
36# define save_stack_trace(trace) do { } while (0)
37# define save_stack_trace_tsk(tsk, trace) do { } while (0)
38# define save_stack_trace_user(trace) do { } while (0)
39# define print_stack_trace(trace, spaces) do { } while (0)
40# define snprint_stack_trace(buf, size, trace, spaces) do { } while (0)
41# define save_stack_trace_tsk_reliable(tsk, trace) ({ -ENOSYS; })
42#endif /* CONFIG_STACKTRACE */
43
44#endif /* __LINUX_STACKTRACE_H */
45