projects/linux·blob master · refs

68 lines · 2.0 KiB

1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H
3#define _LINUX_KERNEL_FTRACE_INTERNAL_H
4
5int __register_ftrace_function(struct ftrace_ops *ops);
6int __unregister_ftrace_function(struct ftrace_ops *ops);
7
8#ifdef CONFIG_FUNCTION_TRACER
9
10extern struct mutex ftrace_lock;
11extern struct ftrace_ops global_ops;
12
13#ifdef CONFIG_DYNAMIC_FTRACE
14
15int ftrace_startup(struct ftrace_ops *ops, int command);
16int ftrace_shutdown(struct ftrace_ops *ops, int command);
17int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs);
18int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command);
19int ftrace_shutdown_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command);
20
21#else /* !CONFIG_DYNAMIC_FTRACE */
22
23/* Keep as macros so we do not need to define the commands */
24# define ftrace_startup(ops, command) \
25 ({ \
26 int ___ret = __register_ftrace_function(ops); \
27 if (!___ret) \
28 (ops)->flags |= FTRACE_OPS_FL_ENABLED; \
29 ___ret; \
30 })
31# define ftrace_shutdown(ops, command) \
32 ({ \
33 int ___ret = __unregister_ftrace_function(ops); \
34 if (!___ret) \
35 (ops)->flags &= ~FTRACE_OPS_FL_ENABLED; \
36 ___ret; \
37 })
38static inline int
39ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs)
40{
41 return 1;
42}
43static inline int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command)
44{
45 return -EINVAL;
46}
47static inline int ftrace_shutdown_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command)
48{
49 return -EINVAL;
50}
51#endif /* CONFIG_DYNAMIC_FTRACE */
52
53#ifdef CONFIG_FUNCTION_GRAPH_TRACER
54extern int ftrace_graph_active;
55# ifdef CONFIG_DYNAMIC_FTRACE
56extern void fgraph_update_pid_func(void);
57# else
58static inline void fgraph_update_pid_func(void) {}
59# endif
60#else /* !CONFIG_FUNCTION_GRAPH_TRACER */
61# define ftrace_graph_active 0
62static inline void fgraph_update_pid_func(void) {}
63#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
64
65#else /* !CONFIG_FUNCTION_TRACER */
66#endif /* CONFIG_FUNCTION_TRACER */
67
68#endif