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