include/linux/stacktrace.h

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