stacktrace.h

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#ifndef __LINUX_STACKTRACE_H
#define __LINUX_STACKTRACE_H

struct task_struct;
struct pt_regs;

#ifdef CONFIG_STACKTRACE
struct task_struct;

struct stack_trace {
    unsigned int nr_entries, max_entries;
    unsigned long *entries;
    int skip;   /* input argument: How many entries to skip */
};

extern void save_stack_trace(struct stack_trace *trace);
extern void save_stack_trace_regs(struct pt_regs *regs,
                  struct stack_trace *trace);
extern void save_stack_trace_tsk(struct task_struct *tsk,
                struct stack_trace *trace);

extern void print_stack_trace(struct stack_trace *trace, int spaces);

#ifdef CONFIG_USER_STACKTRACE_SUPPORT
extern void save_stack_trace_user(struct stack_trace *trace);
#else
# define save_stack_trace_user(trace)              do { } while (0)
#endif

#else
# define save_stack_trace(trace)            do { } while (0)
# define save_stack_trace_tsk(tsk, trace)       do { } while (0)
# define save_stack_trace_user(trace)           do { } while (0)
# define print_stack_trace(trace, spaces)       do { } while (0)
#endif

#endif