2c11181c82e0b206d84936a77608cdc1165d7852
[linux-modified.git] / perf.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #undef TRACE_SYSTEM_VAR
4
5 #ifdef CONFIG_PERF_EVENTS
6
7 #include "stages/stage6_event_callback.h"
8
9 #undef __perf_count
10 #define __perf_count(c) (__count = (c))
11
12 #undef __perf_task
13 #define __perf_task(t)  (__task = (t))
14
15 #undef DECLARE_EVENT_CLASS
16 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
17 static notrace void                                                     \
18 perf_trace_##call(void *__data, proto)                                  \
19 {                                                                       \
20         struct trace_event_call *event_call = __data;                   \
21         struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
22         struct trace_event_raw_##call *entry;                           \
23         struct pt_regs *__regs;                                         \
24         u64 __count = 1;                                                \
25         struct task_struct *__task = NULL;                              \
26         struct hlist_head *head;                                        \
27         int __entry_size;                                               \
28         int __data_size;                                                \
29         int rctx;                                                       \
30                                                                         \
31         __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
32                                                                         \
33         head = this_cpu_ptr(event_call->perf_events);                   \
34         if (!bpf_prog_array_valid(event_call) &&                        \
35             __builtin_constant_p(!__task) && !__task &&                 \
36             hlist_empty(head))                                          \
37                 return;                                                 \
38                                                                         \
39         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
40                              sizeof(u64));                              \
41         __entry_size -= sizeof(u32);                                    \
42                                                                         \
43         entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx);     \
44         if (!entry)                                                     \
45                 return;                                                 \
46                                                                         \
47         perf_fetch_caller_regs(__regs);                                 \
48                                                                         \
49         tstruct                                                         \
50                                                                         \
51         { assign; }                                                     \
52                                                                         \
53         perf_trace_run_bpf_submit(entry, __entry_size, rctx,            \
54                                   event_call, __count, __regs,          \
55                                   head, __task);                        \
56 }
57
58 /*
59  * This part is compiled out, it is only here as a build time check
60  * to make sure that if the tracepoint handling changes, the
61  * perf probe will fail to compile unless it too is updated.
62  */
63 #undef DEFINE_EVENT
64 #define DEFINE_EVENT(template, call, proto, args)                       \
65 static inline void perf_test_probe_##call(void)                         \
66 {                                                                       \
67         check_trace_callback_type_##call(perf_trace_##template);        \
68 }
69
70
71 #undef DEFINE_EVENT_PRINT
72 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
73         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
74
75 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
76 #endif /* CONFIG_PERF_EVENTS */