22 static void tracing_start_function_trace(struct trace_array *tr);
23 static void tracing_stop_function_trace(struct trace_array *tr);
52 int ftrace_allocate_ftrace_ops(struct trace_array *tr)  in ftrace_allocate_ftrace_ops()  argument
57 	if (tr->flags & TRACE_ARRAY_FL_GLOBAL)  in ftrace_allocate_ftrace_ops()
68 	tr->ops = ops;  in ftrace_allocate_ftrace_ops()
69 	ops->private = tr;  in ftrace_allocate_ftrace_ops()
74 void ftrace_free_ftrace_ops(struct trace_array *tr)  in ftrace_free_ftrace_ops()  argument
76 	kfree(tr->ops);  in ftrace_free_ftrace_ops()
77 	tr->ops = NULL;  in ftrace_free_ftrace_ops()
80 int ftrace_create_function_files(struct trace_array *tr,  in ftrace_create_function_files()  argument
87 	if (tr->flags & TRACE_ARRAY_FL_GLOBAL)  in ftrace_create_function_files()
90 	if (!tr->ops)  in ftrace_create_function_files()
93 	ftrace_create_filter_files(tr->ops, parent);  in ftrace_create_function_files()
98 void ftrace_destroy_function_files(struct trace_array *tr)  in ftrace_destroy_function_files()  argument
100 	ftrace_destroy_filter_files(tr->ops);  in ftrace_destroy_function_files()
101 	ftrace_free_ftrace_ops(tr);  in ftrace_destroy_function_files()
120 static bool handle_func_repeats(struct trace_array *tr, u32 flags_val)  in handle_func_repeats()  argument
122 	if (!tr->last_func_repeats &&  in handle_func_repeats()
124 		tr->last_func_repeats = alloc_percpu(struct trace_func_repeats);  in handle_func_repeats()
125 		if (!tr->last_func_repeats)  in handle_func_repeats()
132 static int function_trace_init(struct trace_array *tr)  in function_trace_init()  argument
140 	if (!tr->ops)  in function_trace_init()
147 	if (!handle_func_repeats(tr, func_flags.val))  in function_trace_init()
150 	ftrace_init_array_ops(tr, func);  in function_trace_init()
152 	tr->array_buffer.cpu = raw_smp_processor_id();  in function_trace_init()
155 	tracing_start_function_trace(tr);  in function_trace_init()
159 static void function_trace_reset(struct trace_array *tr)  in function_trace_reset()  argument
161 	tracing_stop_function_trace(tr);  in function_trace_reset()
163 	ftrace_reset_array_ops(tr);  in function_trace_reset()
166 static void function_trace_start(struct trace_array *tr)  in function_trace_start()  argument
168 	tracing_reset_online_cpus(&tr->array_buffer);  in function_trace_start()
175 	struct trace_array *tr = op->private;  in function_trace_call()  local
181 	if (unlikely(!tr->function_enabled))  in function_trace_call()
192 	data = per_cpu_ptr(tr->array_buffer.data, cpu);  in function_trace_call()
194 		trace_function(tr, ip, parent_ip, trace_ctx);  in function_trace_call()
222 	struct trace_array *tr = op->private;  in function_stack_trace_call()  local
229 	if (unlikely(!tr->function_enabled))  in function_stack_trace_call()
238 	data = per_cpu_ptr(tr->array_buffer.data, cpu);  in function_stack_trace_call()
243 		trace_function(tr, ip, parent_ip, trace_ctx);  in function_stack_trace_call()
244 		__trace_stack(tr, trace_ctx, STACK_SKIP);  in function_stack_trace_call()
251 static inline bool is_repeat_check(struct trace_array *tr,  in is_repeat_check()  argument
259 			ring_buffer_time_stamp(tr->array_buffer.buffer);  in is_repeat_check()
267 static inline void process_repeats(struct trace_array *tr,  in process_repeats()  argument
273 		trace_last_func_repeats(tr, last_info, trace_ctx);  in process_repeats()
287 	struct trace_array *tr = op->private;  in function_no_repeats_trace_call()  local
294 	if (unlikely(!tr->function_enabled))  in function_no_repeats_trace_call()
304 	data = per_cpu_ptr(tr->array_buffer.data, cpu);  in function_no_repeats_trace_call()
315 	last_info = per_cpu_ptr(tr->last_func_repeats, cpu);  in function_no_repeats_trace_call()
316 	if (is_repeat_check(tr, last_info, ip, parent_ip))  in function_no_repeats_trace_call()
321 	process_repeats(tr, ip, parent_ip, last_info, trace_ctx);  in function_no_repeats_trace_call()
323 	trace_function(tr, ip, parent_ip, trace_ctx);  in function_no_repeats_trace_call()
336 	struct trace_array *tr = op->private;  in function_stack_no_repeats_trace_call()  local
343 	if (unlikely(!tr->function_enabled))  in function_stack_no_repeats_trace_call()
352 	data = per_cpu_ptr(tr->array_buffer.data, cpu);  in function_stack_no_repeats_trace_call()
356 		last_info = per_cpu_ptr(tr->last_func_repeats, cpu);  in function_stack_no_repeats_trace_call()
357 		if (is_repeat_check(tr, last_info, ip, parent_ip))  in function_stack_no_repeats_trace_call()
361 		process_repeats(tr, ip, parent_ip, last_info, trace_ctx);  in function_stack_no_repeats_trace_call()
363 		trace_function(tr, ip, parent_ip, trace_ctx);  in function_stack_no_repeats_trace_call()
364 		__trace_stack(tr, trace_ctx, STACK_SKIP);  in function_stack_no_repeats_trace_call()
385 static void tracing_start_function_trace(struct trace_array *tr)  in tracing_start_function_trace()  argument
387 	tr->function_enabled = 0;  in tracing_start_function_trace()
388 	register_ftrace_function(tr->ops);  in tracing_start_function_trace()
389 	tr->function_enabled = 1;  in tracing_start_function_trace()
392 static void tracing_stop_function_trace(struct trace_array *tr)  in tracing_stop_function_trace()  argument
394 	tr->function_enabled = 0;  in tracing_stop_function_trace()
395 	unregister_ftrace_function(tr->ops);  in tracing_stop_function_trace()
401 func_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)  in func_set_flag()  argument
411 	if (tr->current_trace != &function_trace)  in func_set_flag()
420 	if (tr->ops->func == func)  in func_set_flag()
423 	if (!handle_func_repeats(tr, new_flags))  in func_set_flag()
426 	unregister_ftrace_function(tr->ops);  in func_set_flag()
427 	tr->ops->func = func;  in func_set_flag()
428 	register_ftrace_function(tr->ops);  in func_set_flag()
450 				 struct trace_array *tr, bool on,  in update_traceon_count()  argument
495 	if (on == !!tracer_tracing_is_on(tr))  in update_traceon_count()
499 		tracer_tracing_on(tr);  in update_traceon_count()
501 		tracer_tracing_off(tr);  in update_traceon_count()
511 		     struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_traceon_count()  argument
514 	update_traceon_count(ops, ip, tr, 1, data);  in ftrace_traceon_count()
519 		      struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_traceoff_count()  argument
522 	update_traceon_count(ops, ip, tr, 0, data);  in ftrace_traceoff_count()
527 	       struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_traceon()  argument
530 	if (tracer_tracing_is_on(tr))  in ftrace_traceon()
533 	tracer_tracing_on(tr);  in ftrace_traceon()
538 		struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_traceoff()  argument
541 	if (!tracer_tracing_is_on(tr))  in ftrace_traceoff()
544 	tracer_tracing_off(tr);  in ftrace_traceoff()
569 static __always_inline void trace_stack(struct trace_array *tr)  in trace_stack()  argument
575 	__trace_stack(tr, trace_ctx, FTRACE_STACK_SKIP);  in trace_stack()
580 		  struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_stacktrace()  argument
583 	trace_stack(tr);  in ftrace_stacktrace()
588 			struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_stacktrace_count()  argument
601 		trace_stack(tr);  in ftrace_stacktrace_count()
620 			trace_stack(tr);  in ftrace_stacktrace_count()
648 		  struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_dump_probe()  argument
658 		     struct trace_array *tr, struct ftrace_probe_ops *ops,  in ftrace_cpudump_probe()  argument
724 ftrace_count_init(struct ftrace_probe_ops *ops, struct trace_array *tr,  in ftrace_count_init()  argument
740 ftrace_count_free(struct ftrace_probe_ops *ops, struct trace_array *tr,  in ftrace_count_free()  argument
802 ftrace_trace_probe_callback(struct trace_array *tr,  in ftrace_trace_probe_callback()  argument
816 		return unregister_ftrace_function_probe_func(glob+1, tr, ops);  in ftrace_trace_probe_callback()
835 	ret = register_ftrace_function_probe(glob, tr, ops, count);  in ftrace_trace_probe_callback()
841 ftrace_trace_onoff_callback(struct trace_array *tr, struct ftrace_hash *hash,  in ftrace_trace_onoff_callback()  argument
846 	if (!tr)  in ftrace_trace_onoff_callback()
855 	return ftrace_trace_probe_callback(tr, ops, hash, glob, cmd,  in ftrace_trace_onoff_callback()
860 ftrace_stacktrace_callback(struct trace_array *tr, struct ftrace_hash *hash,  in ftrace_stacktrace_callback()  argument
865 	if (!tr)  in ftrace_stacktrace_callback()
870 	return ftrace_trace_probe_callback(tr, ops, hash, glob, cmd,  in ftrace_stacktrace_callback()
875 ftrace_dump_callback(struct trace_array *tr, struct ftrace_hash *hash,  in ftrace_dump_callback()  argument
880 	if (!tr)  in ftrace_dump_callback()
886 	return ftrace_trace_probe_callback(tr, ops, hash, glob, cmd,  in ftrace_dump_callback()
891 ftrace_cpudump_callback(struct trace_array *tr, struct ftrace_hash *hash,  in ftrace_cpudump_callback()  argument
896 	if (!tr)  in ftrace_cpudump_callback()
902 	return ftrace_trace_probe_callback(tr, ops, hash, glob, cmd,  in ftrace_cpudump_callback()