Release 4.12 include/trace/perf.h

#undef TRACE_SYSTEM_VAR

#ifdef CONFIG_PERF_EVENTS


#undef __entry

#define __entry entry


#undef __get_dynamic_array

#define __get_dynamic_array(field)	\
		((void *)__entry + (__entry->__data_loc_##field & 0xffff))


#undef __get_dynamic_array_len

#define __get_dynamic_array_len(field)	\
		((__entry->__data_loc_##field >> 16) & 0xffff)


#undef __get_str

#define __get_str(field) ((char *)__get_dynamic_array(field))


#undef __get_bitmask

#define __get_bitmask(field) (char *)__get_dynamic_array(field)


#undef __perf_count

#define __perf_count(c)	(__count = (c))


#undef __perf_task

#define __perf_task(t)	(__task = (t))


#undef DECLARE_EVENT_CLASS

#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
static notrace void                                                     \
perf_trace_##call(void *__data, proto)                                  \
{                                                                       \
        struct trace_event_call *event_call = __data;                   \
        struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
        struct trace_event_raw_##call *entry;                           \
        struct bpf_prog *prog = event_call->prog;                       \
        struct pt_regs *__regs;                                         \
        u64 __count = 1;                                                \
        struct task_struct *__task = NULL;                              \
        struct hlist_head *head;                                        \
        int __entry_size;                                               \
        int __data_size;                                                \
        int rctx;                                                       \
                                                                        \
        __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
                                                                        \
        head = this_cpu_ptr(event_call->perf_events);                   \
        if (!prog && __builtin_constant_p(!__task) && !__task &&        \
                                hlist_empty(head))                      \
                return;                                                 \
                                                                        \
        __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
                             sizeof(u64));                              \
        __entry_size -= sizeof(u32);                                    \
                                                                        \
        entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx);     \
        if (!entry)                                                     \
                return;                                                 \
                                                                        \
        perf_fetch_caller_regs(__regs);                                 \
                                                                        \
        tstruct                                                         \
                                                                        \
        { assign; }                                                     \
                                                                        \
        perf_trace_run_bpf_submit(entry, __entry_size, rctx,            \
                                  event_call, __count, __regs,          \
                                  head, __task);                        \
}

/*
 * This part is compiled out, it is only here as a build time check
 * to make sure that if the tracepoint handling changes, the
 * perf probe will fail to compile unless it too is updated.
 */

#undef DEFINE_EVENT

#define DEFINE_EVENT(template, call, proto, args)			\
static inline void perf_test_probe_##call(void)                         \
{                                                                       \
        check_trace_callback_type_##call(perf_trace_##template);        \
}



#undef DEFINE_EVENT_PRINT

#define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))

#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#endif /* CONFIG_PERF_EVENTS */
Overall Contributors
Person
Tokens
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Commits
CommitProp
Steven Rostedt
137
98.56%
1
33.33%
Daniel Bristot de Oliveira
1
0.72%
1
33.33%
Alexei Starovoitov
1
0.72%
1
33.33%
Total
139
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3
100.00%
Directory: include/trace

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