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 */ 77