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