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_cpumask
25#define __get_cpumask(field) (char *)__get_dynamic_array(field)
26
27#undef __get_sockaddr
28#define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
29
30#undef __get_rel_dynamic_array
31#define __get_rel_dynamic_array(field) \
32 ((void *)__entry + \
33 offsetof(typeof(*__entry), __rel_loc_##field) + \
34 sizeof(__entry->__rel_loc_##field) + \
35 (__entry->__rel_loc_##field & 0xffff))
36
37#undef __get_rel_dynamic_array_len
38#define __get_rel_dynamic_array_len(field) \
39 ((__entry->__rel_loc_##field >> 16) & 0xffff)
40
41#undef __get_rel_str
42#define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field))
43
44#undef __get_rel_bitmask
45#define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field)
46
47#undef __get_rel_cpumask
48#define __get_rel_cpumask(field) (char *)__get_rel_dynamic_array(field)
49
50#undef __get_rel_sockaddr
51#define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
52
53#undef __perf_count
54#define __perf_count(c) (__count = (c))
55
56#undef __perf_task
57#define __perf_task(t) (__task = (t))
58
59#undef DECLARE_EVENT_CLASS
60#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
61static notrace void \
62perf_trace_##call(void *__data, proto) \
63{ \
64 struct trace_event_call *event_call = __data; \
65 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
66 struct trace_event_raw_##call *entry; \
67 struct pt_regs *__regs; \
68 u64 __count = 1; \
69 struct task_struct *__task = NULL; \
70 struct hlist_head *head; \
71 int __entry_size; \
72 int __data_size; \
73 int rctx; \
74 \
75 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
76 \
77 head = this_cpu_ptr(event_call->perf_events); \
78 if (!bpf_prog_array_valid(event_call) && \
79 __builtin_constant_p(!__task) && !__task && \
80 hlist_empty(head)) \
81 return; \
82 \
83 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
84 sizeof(u64)); \
85 __entry_size -= sizeof(u32); \
86 \
87 entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx); \
88 if (!entry) \
89 return; \
90 \
91 perf_fetch_caller_regs(__regs); \
92 \
93 tstruct \
94 \
95 { assign; } \
96 \
97 perf_trace_run_bpf_submit(entry, __entry_size, rctx, \
98 event_call, __count, __regs, \
99 head, __task); \
100}
101
102/*
103 * This part is compiled out, it is only here as a build time check
104 * to make sure that if the tracepoint handling changes, the
105 * perf probe will fail to compile unless it too is updated.
106 */
107#undef DEFINE_EVENT
108#define DEFINE_EVENT(template, call, proto, args) \
109static inline void perf_test_probe_##call(void) \
110{ \
111 check_trace_callback_type_##call(perf_trace_##template); \
112}
113
114
115#undef DEFINE_EVENT_PRINT
116#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
117 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
118
119#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
120#endif /* CONFIG_PERF_EVENTS */