77 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2 3#undef TRACE_SYSTEM_VAR4 5#ifdef CONFIG_PERF_EVENTS6 7#include "stages/stage6_event_callback.h"8 9#undef __perf_count10#define __perf_count(c) (__count = (c))11 12#undef __perf_task13#define __perf_task(t) (__task = (t))14 15#undef DECLARE_EVENT_CLASS16#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \17static notrace void \18perf_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 check60 * to make sure that if the tracepoint handling changes, the61 * perf probe will fail to compile unless it too is updated.62 */63#undef DEFINE_EVENT64#define DEFINE_EVENT(template, call, proto, args) \65static inline void perf_test_probe_##call(void) \66{ \67 check_trace_callback_type_##call(perf_trace_##template); \68}69 70 71#undef DEFINE_EVENT_PRINT72#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