1 #ifndef __LINUX_STACKTRACE_H
2 #define __LINUX_STACKTRACE_H
3 
4 struct task_struct;
5 struct pt_regs;
6 
7 #ifdef CONFIG_STACKTRACE
8 struct task_struct;
9 
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 
22 extern void print_stack_trace(struct stack_trace *trace, int spaces);
23 
24 #ifdef CONFIG_USER_STACKTRACE_SUPPORT
25 extern void save_stack_trace_user(struct stack_trace *trace);
26 #else
27 # define save_stack_trace_user(trace)              do { } while (0)
28 #endif
29 
30 #else
31 # define save_stack_trace(trace)			do { } while (0)
32 # define save_stack_trace_tsk(tsk, trace)		do { } while (0)
33 # define save_stack_trace_user(trace)			do { } while (0)
34 # define print_stack_trace(trace, spaces)		do { } while (0)
35 #endif
36 
37 #endif
38