Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Ingo Molnar | 8637c09 | 2006-07-03 00:24:38 -0700 | [diff] [blame] | 2 | #ifndef __LINUX_STACKTRACE_H |
| 3 | #define __LINUX_STACKTRACE_H |
| 4 | |
Joonsoo Kim | 9a92a6c | 2014-12-12 16:55:58 -0800 | [diff] [blame] | 5 | #include <linux/types.h> |
Thomas Gleixner | e9b98e1 | 2019-04-25 11:44:55 +0200 | [diff] [blame^] | 6 | #include <asm/errno.h> |
Joonsoo Kim | 9a92a6c | 2014-12-12 16:55:58 -0800 | [diff] [blame] | 7 | |
Andrew Morton | 897312b | 2008-10-03 15:23:41 -0700 | [diff] [blame] | 8 | struct task_struct; |
Soeren Sandmann Pedersen | 9c0729d | 2010-11-05 05:59:39 -0400 | [diff] [blame] | 9 | struct pt_regs; |
Andrew Morton | 897312b | 2008-10-03 15:23:41 -0700 | [diff] [blame] | 10 | |
Ingo Molnar | 8637c09 | 2006-07-03 00:24:38 -0700 | [diff] [blame] | 11 | #ifdef CONFIG_STACKTRACE |
Thomas Gleixner | e9b98e1 | 2019-04-25 11:44:55 +0200 | [diff] [blame^] | 12 | void stack_trace_print(unsigned long *trace, unsigned int nr_entries, |
| 13 | int spaces); |
| 14 | int stack_trace_snprint(char *buf, size_t size, unsigned long *entries, |
| 15 | unsigned int nr_entries, int spaces); |
| 16 | unsigned int stack_trace_save(unsigned long *store, unsigned int size, |
| 17 | unsigned int skipnr); |
| 18 | unsigned int stack_trace_save_tsk(struct task_struct *task, |
| 19 | unsigned long *store, unsigned int size, |
| 20 | unsigned int skipnr); |
| 21 | unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store, |
| 22 | unsigned int size, unsigned int skipnr); |
| 23 | unsigned int stack_trace_save_user(unsigned long *store, unsigned int size); |
| 24 | |
| 25 | /* Internal interfaces. Do not use in generic code */ |
Ingo Molnar | 8637c09 | 2006-07-03 00:24:38 -0700 | [diff] [blame] | 26 | struct stack_trace { |
| 27 | unsigned int nr_entries, max_entries; |
| 28 | unsigned long *entries; |
Andi Kleen | 5a1b399 | 2006-09-26 10:52:34 +0200 | [diff] [blame] | 29 | int skip; /* input argument: How many entries to skip */ |
Ingo Molnar | 8637c09 | 2006-07-03 00:24:38 -0700 | [diff] [blame] | 30 | }; |
| 31 | |
Christoph Hellwig | ab1b6f0 | 2007-05-08 00:23:29 -0700 | [diff] [blame] | 32 | extern void save_stack_trace(struct stack_trace *trace); |
Masami Hiramatsu | 3958106 | 2011-06-08 16:09:21 +0900 | [diff] [blame] | 33 | extern void save_stack_trace_regs(struct pt_regs *regs, |
| 34 | struct stack_trace *trace); |
Arjan van de Ven | 9745512 | 2008-01-25 21:08:34 +0100 | [diff] [blame] | 35 | extern void save_stack_trace_tsk(struct task_struct *tsk, |
| 36 | struct stack_trace *trace); |
Josh Poimboeuf | af085d9 | 2017-02-13 19:42:28 -0600 | [diff] [blame] | 37 | extern int save_stack_trace_tsk_reliable(struct task_struct *tsk, |
| 38 | struct stack_trace *trace); |
Ingo Molnar | 8637c09 | 2006-07-03 00:24:38 -0700 | [diff] [blame] | 39 | |
| 40 | extern void print_stack_trace(struct stack_trace *trace, int spaces); |
Joonsoo Kim | 9a92a6c | 2014-12-12 16:55:58 -0800 | [diff] [blame] | 41 | extern int snprint_stack_trace(char *buf, size_t size, |
| 42 | struct stack_trace *trace, int spaces); |
Török Edwin | 02b6751 | 2008-11-22 13:28:47 +0200 | [diff] [blame] | 43 | |
Török Edwin | 8d26487 | 2008-11-23 12:39:08 +0200 | [diff] [blame] | 44 | #ifdef CONFIG_USER_STACKTRACE_SUPPORT |
Török Edwin | 02b6751 | 2008-11-22 13:28:47 +0200 | [diff] [blame] | 45 | extern void save_stack_trace_user(struct stack_trace *trace); |
| 46 | #else |
| 47 | # define save_stack_trace_user(trace) do { } while (0) |
| 48 | #endif |
| 49 | |
Josh Poimboeuf | af085d9 | 2017-02-13 19:42:28 -0600 | [diff] [blame] | 50 | #else /* !CONFIG_STACKTRACE */ |
Christoph Hellwig | ab1b6f0 | 2007-05-08 00:23:29 -0700 | [diff] [blame] | 51 | # define save_stack_trace(trace) do { } while (0) |
Arjan van de Ven | 9745512 | 2008-01-25 21:08:34 +0100 | [diff] [blame] | 52 | # define save_stack_trace_tsk(tsk, trace) do { } while (0) |
Török Edwin | 8d7c6a9 | 2008-11-23 12:39:06 +0200 | [diff] [blame] | 53 | # define save_stack_trace_user(trace) do { } while (0) |
Johannes Berg | 3b5ad07 | 2007-07-19 01:49:02 -0700 | [diff] [blame] | 54 | # define print_stack_trace(trace, spaces) do { } while (0) |
Joonsoo Kim | 9a92a6c | 2014-12-12 16:55:58 -0800 | [diff] [blame] | 55 | # define snprint_stack_trace(buf, size, trace, spaces) do { } while (0) |
Josh Poimboeuf | af085d9 | 2017-02-13 19:42:28 -0600 | [diff] [blame] | 56 | # define save_stack_trace_tsk_reliable(tsk, trace) ({ -ENOSYS; }) |
| 57 | #endif /* CONFIG_STACKTRACE */ |
Ingo Molnar | 8637c09 | 2006-07-03 00:24:38 -0700 | [diff] [blame] | 58 | |
Thomas Gleixner | e9b98e1 | 2019-04-25 11:44:55 +0200 | [diff] [blame^] | 59 | #if defined(CONFIG_STACKTRACE) && defined(CONFIG_HAVE_RELIABLE_STACKTRACE) |
| 60 | int stack_trace_save_tsk_reliable(struct task_struct *tsk, unsigned long *store, |
| 61 | unsigned int size); |
| 62 | #else |
| 63 | static inline int stack_trace_save_tsk_reliable(struct task_struct *tsk, |
| 64 | unsigned long *store, |
| 65 | unsigned int size) |
| 66 | { |
| 67 | return -ENOSYS; |
| 68 | } |
| 69 | #endif |
| 70 | |
Josh Poimboeuf | af085d9 | 2017-02-13 19:42:28 -0600 | [diff] [blame] | 71 | #endif /* __LINUX_STACKTRACE_H */ |