76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H
|
|
#define _LINUX_KERNEL_FTRACE_INTERNAL_H
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
|
|
/*
|
|
* Traverse the ftrace_global_list, invoking all entries. The reason that we
|
|
* can use rcu_dereference_raw_notrace() is that elements removed from this list
|
|
* are simply leaked, so there is no need to interact with a grace-period
|
|
* mechanism. The rcu_dereference_raw_notrace() calls are needed to handle
|
|
* concurrent insertions into the ftrace_global_list.
|
|
*
|
|
* Silly Alpha and silly pointer-speculation compiler optimizations!
|
|
*/
|
|
#define do_for_each_ftrace_op(op, list) \
|
|
op = rcu_dereference_raw_notrace(list); \
|
|
do
|
|
|
|
/*
|
|
* Optimized for just a single item in the list (as that is the normal case).
|
|
*/
|
|
#define while_for_each_ftrace_op(op) \
|
|
while (likely(op = rcu_dereference_raw_notrace((op)->next)) && \
|
|
unlikely((op) != &ftrace_list_end))
|
|
|
|
extern struct ftrace_ops __rcu *ftrace_ops_list;
|
|
extern struct ftrace_ops ftrace_list_end;
|
|
extern struct mutex ftrace_lock;
|
|
extern struct ftrace_ops global_ops;
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
|
|
int ftrace_startup(struct ftrace_ops *ops, int command);
|
|
int ftrace_shutdown(struct ftrace_ops *ops, int command);
|
|
int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs);
|
|
|
|
#else /* !CONFIG_DYNAMIC_FTRACE */
|
|
|
|
int __register_ftrace_function(struct ftrace_ops *ops);
|
|
int __unregister_ftrace_function(struct ftrace_ops *ops);
|
|
/* Keep as macros so we do not need to define the commands */
|
|
# define ftrace_startup(ops, command) \
|
|
({ \
|
|
int ___ret = __register_ftrace_function(ops); \
|
|
if (!___ret) \
|
|
(ops)->flags |= FTRACE_OPS_FL_ENABLED; \
|
|
___ret; \
|
|
})
|
|
# define ftrace_shutdown(ops, command) \
|
|
({ \
|
|
int ___ret = __unregister_ftrace_function(ops); \
|
|
if (!___ret) \
|
|
(ops)->flags &= ~FTRACE_OPS_FL_ENABLED; \
|
|
___ret; \
|
|
})
|
|
static inline int
|
|
ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs)
|
|
{
|
|
return 1;
|
|
}
|
|
#endif /* CONFIG_DYNAMIC_FTRACE */
|
|
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
extern int ftrace_graph_active;
|
|
void update_function_graph_func(void);
|
|
#else /* !CONFIG_FUNCTION_GRAPH_TRACER */
|
|
# define ftrace_graph_active 0
|
|
static inline void update_function_graph_func(void) { }
|
|
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
|
|
|
|
#else /* !CONFIG_FUNCTION_TRACER */
|
|
#endif /* CONFIG_FUNCTION_TRACER */
|
|
|
|
#endif
|