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