1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #undef TRACE_SYSTEM_VAR
4 
5 #ifdef CONFIG_PERF_EVENTS
6 
7 #undef __entry
8 #define __entry entry
9 
10 #undef __get_dynamic_array
11 #define __get_dynamic_array(field)	\
12 		((void *)__entry + (__entry->__data_loc_##field & 0xffff))
13 
14 #undef __get_dynamic_array_len
15 #define __get_dynamic_array_len(field)	\
16 		((__entry->__data_loc_##field >> 16) & 0xffff)
17 
18 #undef __get_str
19 #define __get_str(field) ((char *)__get_dynamic_array(field))
20 
21 #undef __get_bitmask
22 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
23 
24 #undef __perf_count
25 #define __perf_count(c)	(__count = (c))
26 
27 #undef __perf_task
28 #define __perf_task(t)	(__task = (t))
29 
30 #undef DECLARE_EVENT_CLASS
31 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
32 static notrace void							\
33 perf_trace_##call(void *__data, proto)					\
34 {									\
35 	struct trace_event_call *event_call = __data;			\
36 	struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
37 	struct trace_event_raw_##call *entry;				\
38 	struct pt_regs *__regs;						\
39 	u64 __count = 1;						\
40 	struct task_struct *__task = NULL;				\
41 	struct hlist_head *head;					\
42 	int __entry_size;						\
43 	int __data_size;						\
44 	int rctx;							\
45 									\
46 	__data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
47 									\
48 	head = this_cpu_ptr(event_call->perf_events);			\
49 	if (!bpf_prog_array_valid(event_call) &&			\
50 	    __builtin_constant_p(!__task) && !__task &&			\
51 	    hlist_empty(head))						\
52 		return;							\
53 									\
54 	__entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
55 			     sizeof(u64));				\
56 	__entry_size -= sizeof(u32);					\
57 									\
58 	entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx);	\
59 	if (!entry)							\
60 		return;							\
61 									\
62 	perf_fetch_caller_regs(__regs);					\
63 									\
64 	tstruct								\
65 									\
66 	{ assign; }							\
67 									\
68 	perf_trace_run_bpf_submit(entry, __entry_size, rctx,		\
69 				  event_call, __count, __regs,		\
70 				  head, __task);			\
71 }
72 
73 /*
74  * This part is compiled out, it is only here as a build time check
75  * to make sure that if the tracepoint handling changes, the
76  * perf probe will fail to compile unless it too is updated.
77  */
78 #undef DEFINE_EVENT
79 #define DEFINE_EVENT(template, call, proto, args)			\
80 static inline void perf_test_probe_##call(void)				\
81 {									\
82 	check_trace_callback_type_##call(perf_trace_##template);	\
83 }
84 
85 
86 #undef DEFINE_EVENT_PRINT
87 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
88 	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
89 
90 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
91 #endif /* CONFIG_PERF_EVENTS */
92