123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351 |
- /*
- * Stage 4 of the trace events.
- *
- * Override the macros in <trace/trace_events.h> to include the following:
- *
- * For those macros defined with TRACE_EVENT:
- *
- * static struct trace_event_call event_<call>;
- *
- * static void trace_event_raw_event_<call>(void *__data, proto)
- * {
- * struct trace_event_file *trace_file = __data;
- * struct trace_event_call *event_call = trace_file->event_call;
- * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
- * unsigned long eflags = trace_file->flags;
- * enum event_trigger_type __tt = ETT_NONE;
- * struct ring_buffer_event *event;
- * struct trace_event_raw_<call> *entry; <-- defined in stage 1
- * struct ring_buffer *buffer;
- * unsigned long irq_flags;
- * int __data_size;
- * int pc;
- *
- * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
- * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
- * event_triggers_call(trace_file, NULL);
- * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
- * return;
- * }
- *
- * local_save_flags(irq_flags);
- * pc = preempt_count();
- *
- * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
- *
- * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
- * event_<call>->event.type,
- * sizeof(*entry) + __data_size,
- * irq_flags, pc);
- * if (!event)
- * return;
- * entry = ring_buffer_event_data(event);
- *
- * { <assign>; } <-- Here we assign the entries by the __field and
- * __array macros.
- *
- * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
- * __tt = event_triggers_call(trace_file, entry);
- *
- * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
- * &trace_file->flags))
- * ring_buffer_discard_commit(buffer, event);
- * else if (!filter_check_discard(trace_file, entry, buffer, event))
- * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
- *
- * if (__tt)
- * event_triggers_post_call(trace_file, __tt);
- * }
- *
- * static struct trace_event ftrace_event_type_<call> = {
- * .trace = trace_raw_output_<call>, <-- stage 2
- * };
- *
- * static char print_fmt_<call>[] = <TP_printk>;
- *
- * static struct trace_event_class __used event_class_<template> = {
- * .system = "<system>",
- * .define_fields = trace_event_define_fields_<call>,
- * .fields = LIST_HEAD_INIT(event_class_##call.fields),
- * .raw_init = trace_event_raw_init,
- * .probe = trace_event_raw_event_##call,
- * .reg = trace_event_reg,
- * };
- *
- * static struct trace_event_call event_<call> = {
- * .class = event_class_<template>,
- * {
- * .tp = &__tracepoint_<call>,
- * },
- * .event = &ftrace_event_type_<call>,
- * .print_fmt = print_fmt_<call>,
- * .flags = TRACE_EVENT_FL_TRACEPOINT,
- * };
- * // its only safe to use pointers when doing linker tricks to
- * // create an array.
- * static struct trace_event_call __used
- * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
- *
- */
- #ifdef CONFIG_PERF_EVENTS
- #define _TRACE_PERF_PROTO(call, proto) \
- static notrace void \
- perf_trace_##call(void *__data, proto);
- #define _TRACE_PERF_INIT(call) \
- .perf_probe = perf_trace_##call,
- #else
- #define _TRACE_PERF_PROTO(call, proto)
- #define _TRACE_PERF_INIT(call)
- #endif /* CONFIG_PERF_EVENTS */
- #undef __entry
- #define __entry entry
- #undef __field
- #define __field(type, item)
- #undef __field_struct
- #define __field_struct(type, item)
- #undef __array
- #define __array(type, item, len)
- #undef __dynamic_array
- #define __dynamic_array(type, item, len) \
- __entry->__data_loc_##item = __data_offsets.item;
- #undef __string
- #define __string(item, src) __dynamic_array(char, item, -1)
- #undef __assign_str
- #define __assign_str(dst, src) \
- strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
- #undef __bitmask
- #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
- #undef __get_bitmask
- #define __get_bitmask(field) (char *)__get_dynamic_array(field)
- #undef __assign_bitmask
- #define __assign_bitmask(dst, src, nr_bits) \
- memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
- #undef TP_fast_assign
- #define TP_fast_assign(args...) args
- #undef __perf_addr
- #define __perf_addr(a) (a)
- #undef __perf_count
- #define __perf_count(c) (c)
- #undef __perf_task
- #define __perf_task(t) (t)
- #undef DECLARE_EVENT_CLASS
- #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- \
- static notrace void \
- trace_event_raw_event_##call(void *__data, proto) \
- { \
- struct trace_event_file *trace_file = __data; \
- struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
- struct trace_event_buffer fbuffer; \
- struct trace_event_raw_##call *entry; \
- int __data_size; \
- \
- if (trace_trigger_soft_disabled(trace_file)) \
- return; \
- \
- __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
- \
- entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
- sizeof(*entry) + __data_size); \
- \
- if (!entry) \
- return; \
- \
- tstruct \
- \
- { assign; } \
- \
- trace_event_buffer_commit(&fbuffer); \
- }
- /*
- * The ftrace_test_probe is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the ftrace probe will
- * fail to compile unless it too is updated.
- */
- #undef DEFINE_EVENT
- #define DEFINE_EVENT(template, call, proto, args) \
- static inline void ftrace_test_probe_##call(void) \
- { \
- check_trace_callback_type_##call(trace_event_raw_event_##template); \
- }
- #undef DEFINE_EVENT_PRINT
- #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
- #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
- #undef __entry
- #define __entry REC
- #undef __print_flags
- #undef __print_symbolic
- #undef __print_hex
- #undef __get_dynamic_array
- #undef __get_dynamic_array_len
- #undef __get_str
- #undef __get_bitmask
- #undef __print_array
- #undef TP_printk
- #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
- #undef DECLARE_EVENT_CLASS
- #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- _TRACE_PERF_PROTO(call, PARAMS(proto)); \
- static char print_fmt_##call[] = print; \
- static struct trace_event_class __used __refdata event_class_##call = { \
- .system = TRACE_SYSTEM_STRING, \
- .define_fields = trace_event_define_fields_##call, \
- .fields = LIST_HEAD_INIT(event_class_##call.fields),\
- .raw_init = trace_event_raw_init, \
- .probe = trace_event_raw_event_##call, \
- .reg = trace_event_reg, \
- _TRACE_PERF_INIT(call) \
- };
- #undef DEFINE_EVENT
- #define DEFINE_EVENT(template, call, proto, args) \
- \
- static struct trace_event_call __used event_##call = { \
- .class = &event_class_##template, \
- { \
- .tp = &__tracepoint_##call, \
- }, \
- .event.funcs = &trace_event_type_funcs_##template, \
- .print_fmt = print_fmt_##template, \
- .flags = TRACE_EVENT_FL_TRACEPOINT, \
- }; \
- static struct trace_event_call __used \
- __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
- #undef DEFINE_EVENT_PRINT
- #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
- \
- static char print_fmt_##call[] = print; \
- \
- static struct trace_event_call __used event_##call = { \
- .class = &event_class_##template, \
- { \
- .tp = &__tracepoint_##call, \
- }, \
- .event.funcs = &trace_event_type_funcs_##call, \
- .print_fmt = print_fmt_##call, \
- .flags = TRACE_EVENT_FL_TRACEPOINT, \
- }; \
- static struct trace_event_call __used \
- __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
- #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
- #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_addr
- #define __perf_addr(a) (__addr = (a))
- #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 pt_regs *__regs; \
- u64 __addr = 0, __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 (__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_prepare(__entry_size, \
- event_call->event.type, &__regs, &rctx); \
- if (!entry) \
- return; \
- \
- perf_fetch_caller_regs(__regs); \
- \
- tstruct \
- \
- { assign; } \
- \
- perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
- __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 */
|