LXR linux/include/linux/stacktrace.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __LINUX_STACKTRACE_H
   3#define __LINUX_STACKTRACE_H
   4
   5#include <linux/types.h>
   6#include <linux/rh_kabi.h>
   7
   8struct task_struct;
   9struct pt_regs;
  10
  11#ifdef CONFIG_STACKTRACE
  12struct stack_trace {
  13        unsigned int nr_entries, max_entries;
  14        unsigned long *entries;
  15        int skip;       /* input argument: How many entries to skip */
  16        RH_KABI_RESERVE(1);
  17        RH_KABI_RESERVE(2);
  18};
  19
  20extern void save_stack_trace(struct stack_trace *trace);
  21extern void save_stack_trace_regs(struct pt_regs *regs,
  22                                  struct stack_trace *trace);
  23extern void save_stack_trace_tsk(struct task_struct *tsk,
  24                                struct stack_trace *trace);
  25extern int save_stack_trace_tsk_reliable(struct task_struct *tsk,
  26                                         struct stack_trace *trace);
  27
  28extern void print_stack_trace(struct stack_trace *trace, int spaces);
  29extern int snprint_stack_trace(char *buf, size_t size,
  30                        struct stack_trace *trace, int spaces);
  31
  32#ifdef CONFIG_USER_STACKTRACE_SUPPORT
  33extern void save_stack_trace_user(struct stack_trace *trace);
  34#else
  35# define save_stack_trace_user(trace)              do { } while (0)
  36#endif
  37
  38#else /* !CONFIG_STACKTRACE */
  39# define save_stack_trace(trace)                        do { } while (0)
  40# define save_stack_trace_tsk(tsk, trace)               do { } while (0)
  41# define save_stack_trace_user(trace)                   do { } while (0)
  42# define print_stack_trace(trace, spaces)               do { } while (0)
  43# define snprint_stack_trace(buf, size, trace, spaces)  do { } while (0)
  44# define save_stack_trace_tsk_reliable(tsk, trace)      ({ -ENOSYS; })
  45#endif /* CONFIG_STACKTRACE */
  46
  47#endif /* __LINUX_STACKTRACE_H */
  48