Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 __get_sockaddr
25#define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
26
27#undef __get_rel_dynamic_array
28#define __get_rel_dynamic_array(field) \
29 ((void *)__entry + \
30 offsetof(typeof(*__entry), __rel_loc_##field) + \
31 sizeof(__entry->__rel_loc_##field) + \
32 (__entry->__rel_loc_##field & 0xffff))
33
34#undef __get_rel_dynamic_array_len
35#define __get_rel_dynamic_array_len(field) \
36 ((__entry->__rel_loc_##field >> 16) & 0xffff)
37
38#undef __get_rel_str
39#define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field))
40
41#undef __get_rel_bitmask
42#define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field)
43
44#undef __get_rel_sockaddr
45#define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
46
47#undef __perf_count
48#define __perf_count(c) (__count = (c))
49
50#undef __perf_task
51#define __perf_task(t) (__task = (t))
52
53#undef DECLARE_EVENT_CLASS
54#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
55static notrace void \
56perf_trace_##call(void *__data, proto) \
57{ \
58 struct trace_event_call *event_call = __data; \
59 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
60 struct trace_event_raw_##call *entry; \
61 struct pt_regs *__regs; \
62 u64 __count = 1; \
63 struct task_struct *__task = NULL; \
64 struct hlist_head *head; \
65 int __entry_size; \
66 int __data_size; \
67 int rctx; \
68 \
69 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
70 \
71 head = this_cpu_ptr(event_call->perf_events); \
72 if (!bpf_prog_array_valid(event_call) && \
73 __builtin_constant_p(!__task) && !__task && \
74 hlist_empty(head)) \
75 return; \
76 \
77 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
78 sizeof(u64)); \
79 __entry_size -= sizeof(u32); \
80 \
81 entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx); \
82 if (!entry) \
83 return; \
84 \
85 perf_fetch_caller_regs(__regs); \
86 \
87 tstruct \
88 \
89 { assign; } \
90 \
91 perf_trace_run_bpf_submit(entry, __entry_size, rctx, \
92 event_call, __count, __regs, \
93 head, __task); \
94}
95
96/*
97 * This part is compiled out, it is only here as a build time check
98 * to make sure that if the tracepoint handling changes, the
99 * perf probe will fail to compile unless it too is updated.
100 */
101#undef DEFINE_EVENT
102#define DEFINE_EVENT(template, call, proto, args) \
103static inline void perf_test_probe_##call(void) \
104{ \
105 check_trace_callback_type_##call(perf_trace_##template); \
106}
107
108
109#undef DEFINE_EVENT_PRINT
110#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
111 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
112
113#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
114#endif /* CONFIG_PERF_EVENTS */