| /* |
| * Stage 1 of the trace events. |
| * |
| * Override the macros in <trace/trace_events.h> to include the following: |
| * |
| * struct ftrace_raw_<call> { |
| * struct trace_entry ent; |
| * <type> <item>; |
| * <type2> <item2>[<len>]; |
| * [...] |
| * }; |
| * |
| * The <type> <item> is created by the __field(type, item) macro or |
| * the __array(type2, item2, len) macro. |
| * We simply do "type item;", and that will create the fields |
| * in the structure. |
| */ |
| |
| #include <linux/ftrace_event.h> |
| |
| /* |
| * DECLARE_EVENT_CLASS can be used to add a generic function |
| * handlers for events. That is, if all events have the same |
| * parameters and just have distinct trace points. |
| * Each tracepoint can be defined with DEFINE_EVENT and that |
| * will map the DECLARE_EVENT_CLASS to the tracepoint. |
| * |
| * TRACE_EVENT is a one to one mapping between tracepoint and template. |
| */ |
| #undef TRACE_EVENT |
| #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ |
| DECLARE_EVENT_CLASS(name, \ |
| PARAMS(proto), \ |
| PARAMS(args), \ |
| PARAMS(tstruct), \ |
| PARAMS(assign), \ |
| PARAMS(print)); \ |
| DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); |
| |
| |
| #undef __field |
| #define __field(type, item) type item; |
| |
| #undef __field_ext |
| #define __field_ext(type, item, filter_type) type item; |
| |
| #undef __array |
| #define __array(type, item, len) type item[len]; |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
| |
| #undef __string |
| #define __string(item, src) __dynamic_array(char, item, -1) |
| |
| #undef TP_STRUCT__entry |
| #define TP_STRUCT__entry(args...) args |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ |
| struct ftrace_raw_##name { \ |
| struct trace_entry ent; \ |
| tstruct \ |
| char __data[0]; \ |
| }; |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, name, proto, args) \ |
| static struct ftrace_event_call \ |
| __attribute__((__aligned__(4))) event_##name |
| |
| #undef DEFINE_EVENT_PRINT |
| #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| |
| #undef __cpparg |
| #define __cpparg(arg...) arg |
| |
| /* Callbacks are meaningless to ftrace. */ |
| #undef TRACE_EVENT_FN |
| #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
| assign, print, reg, unreg) \ |
| TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \ |
| __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \ |
| |
| #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| |
| |
| /* |
| * Stage 2 of the trace events. |
| * |
| * Include the following: |
| * |
| * struct ftrace_data_offsets_<call> { |
| * u32 <item1>; |
| * u32 <item2>; |
| * [...] |
| * }; |
| * |
| * The __dynamic_array() macro will create each u32 <item>, this is |
| * to keep the offset of each array from the beginning of the event. |
| * The size of an array is also encoded, in the higher 16 bits of <item>. |
| */ |
| |
| #undef __field |
| #define __field(type, item) |
| |
| #undef __field_ext |
| #define __field_ext(type, item, filter_type) |
| |
| #undef __array |
| #define __array(type, item, len) |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item, len) u32 item; |
| |
| #undef __string |
| #define __string(item, src) __dynamic_array(char, item, -1) |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| struct ftrace_data_offsets_##call { \ |
| tstruct; \ |
| }; |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, name, proto, args) |
| |
| #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) |
| |
| /* |
| * Stage 3 of the trace events. |
| * |
| * Override the macros in <trace/trace_events.h> to include the following: |
| * |
| * enum print_line_t |
| * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) |
| * { |
| * struct trace_seq *s = &iter->seq; |
| * struct ftrace_raw_<call> *field; <-- defined in stage 1 |
| * struct trace_entry *entry; |
| * struct trace_seq *p; |
| * int ret; |
| * |
| * entry = iter->ent; |
| * |
| * if (entry->type != event_<call>.id) { |
| * WARN_ON_ONCE(1); |
| * return TRACE_TYPE_UNHANDLED; |
| * } |
| * |
| * field = (typeof(field))entry; |
| * |
| * p = get_cpu_var(ftrace_event_seq); |
| * trace_seq_init(p); |
| * ret = trace_seq_printf(s, <TP_printk> "\n"); |
| * put_cpu(); |
| * if (!ret) |
| * return TRACE_TYPE_PARTIAL_LINE; |
| * |
| * return TRACE_TYPE_HANDLED; |
| * } |
| * |
| * This is the method used to print the raw event to the trace |
| * output format. Note, this is not needed if the data is read |
| * in binary. |
| */ |
| |
| #undef __entry |
| #define __entry field |
| |
| #undef TP_printk |
| #define TP_printk(fmt, args...) fmt "\n", args |
| |
| #undef __get_dynamic_array |
| #define __get_dynamic_array(field) \ |
| ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
| |
| #undef __get_str |
| #define __get_str(field) (char *)__get_dynamic_array(field) |
| |
| #undef __print_flags |
| #define __print_flags(flag, delim, flag_array...) \ |
| ({ \ |
| static const struct trace_print_flags __flags[] = \ |
| { flag_array, { -1, NULL }}; \ |
| ftrace_print_flags_seq(p, delim, flag, __flags); \ |
| }) |
| |
| #undef __print_symbolic |
| #define __print_symbolic(value, symbol_array...) \ |
| ({ \ |
| static const struct trace_print_flags symbols[] = \ |
| { symbol_array, { -1, NULL }}; \ |
| ftrace_print_symbols_seq(p, value, symbols); \ |
| }) |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| static notrace enum print_line_t \ |
| ftrace_raw_output_id_##call(int event_id, const char *name, \ |
| struct trace_iterator *iter, int flags) \ |
| { \ |
| struct trace_seq *s = &iter->seq; \ |
| struct ftrace_raw_##call *field; \ |
| struct trace_entry *entry; \ |
| struct trace_seq *p; \ |
| int ret; \ |
| \ |
| entry = iter->ent; \ |
| \ |
| if (entry->type != event_id) { \ |
| WARN_ON_ONCE(1); \ |
| return TRACE_TYPE_UNHANDLED; \ |
| } \ |
| \ |
| field = (typeof(field))entry; \ |
| \ |
| p = &get_cpu_var(ftrace_event_seq); \ |
| trace_seq_init(p); \ |
| ret = trace_seq_printf(s, "%s: ", name); \ |
| if (ret) \ |
| ret = trace_seq_printf(s, print); \ |
| put_cpu(); \ |
| if (!ret) \ |
| return TRACE_TYPE_PARTIAL_LINE; \ |
| \ |
| return TRACE_TYPE_HANDLED; \ |
| } |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, name, proto, args) \ |
| static notrace enum print_line_t \ |
| ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \ |
| { \ |
| return ftrace_raw_output_id_##template(event_##name.id, \ |
| #name, iter, flags); \ |
| } |
| |
| #undef DEFINE_EVENT_PRINT |
| #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ |
| static notrace enum print_line_t \ |
| ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ |
| { \ |
| struct trace_seq *s = &iter->seq; \ |
| struct ftrace_raw_##template *field; \ |
| struct trace_entry *entry; \ |
| struct trace_seq *p; \ |
| int ret; \ |
| \ |
| entry = iter->ent; \ |
| \ |
| if (entry->type != event_##call.id) { \ |
| WARN_ON_ONCE(1); \ |
| return TRACE_TYPE_UNHANDLED; \ |
| } \ |
| \ |
| field = (typeof(field))entry; \ |
| \ |
| p = &get_cpu_var(ftrace_event_seq); \ |
| trace_seq_init(p); \ |
| ret = trace_seq_printf(s, "%s: ", #call); \ |
| if (ret) \ |
| ret = trace_seq_printf(s, print); \ |
| put_cpu(); \ |
| if (!ret) \ |
| return TRACE_TYPE_PARTIAL_LINE; \ |
| \ |
| return TRACE_TYPE_HANDLED; \ |
| } |
| |
| #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| |
| #undef __field_ext |
| #define __field_ext(type, item, filter_type) \ |
| ret = trace_define_field(event_call, #type, #item, \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item), \ |
| is_signed_type(type), filter_type); \ |
| if (ret) \ |
| return ret; |
| |
| #undef __field |
| #define __field(type, item) __field_ext(type, item, FILTER_OTHER) |
| |
| #undef __array |
| #define __array(type, item, len) \ |
| BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
| ret = trace_define_field(event_call, #type "[" #len "]", #item, \ |
| offsetof(typeof(field), item), \ |
| sizeof(field.item), \ |
| is_signed_type(type), FILTER_OTHER); \ |
| if (ret) \ |
| return ret; |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item, len) \ |
| ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
| offsetof(typeof(field), __data_loc_##item), \ |
| sizeof(field.__data_loc_##item), \ |
| is_signed_type(type), FILTER_OTHER); |
| |
| #undef __string |
| #define __string(item, src) __dynamic_array(char, item, -1) |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ |
| static int notrace \ |
| ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
| { \ |
| struct ftrace_raw_##call field; \ |
| int ret; \ |
| \ |
| tstruct; \ |
| \ |
| return ret; \ |
| } |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, name, proto, args) |
| |
| #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) |
| |
| /* |
| * remember the offset of each array from the beginning of the event. |
| */ |
| |
| #undef __entry |
| #define __entry entry |
| |
| #undef __field |
| #define __field(type, item) |
| |
| #undef __field_ext |
| #define __field_ext(type, item, filter_type) |
| |
| #undef __array |
| #define __array(type, item, len) |
| |
| #undef __dynamic_array |
| #define __dynamic_array(type, item, len) \ |
| __data_offsets->item = __data_size + \ |
| offsetof(typeof(*entry), __data); \ |
| __data_offsets->item |= (len * sizeof(type)) << 16; \ |
| __data_size += (len) * sizeof(type); |
| |
| #undef __string |
| #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| static inline notrace int ftrace_get_offsets_##call( \ |
| struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
| { \ |
| int __data_size = 0; \ |
| struct ftrace_raw_##call __maybe_unused *entry; \ |
| \ |
| tstruct; \ |
| \ |
| return __data_size; \ |
| } |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, name, proto, args) |
| |
| #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) |
| |
| #ifdef CONFIG_PERF_EVENTS |
| |
| /* |
| * Generate the functions needed for tracepoint perf_event support. |
| * |
| * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later |
| * |
| * static int ftrace_profile_enable_<call>(void) |
| * { |
| * return register_trace_<call>(ftrace_profile_<call>); |
| * } |
| * |
| * static void ftrace_profile_disable_<call>(void) |
| * { |
| * unregister_trace_<call>(ftrace_profile_<call>); |
| * } |
| * |
| */ |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, name, proto, args) \ |
| \ |
| static void ftrace_profile_##name(proto); \ |
| \ |
| static notrace int \ |
| ftrace_profile_enable_##name(struct ftrace_event_call *unused) \ |
| { \ |
| return register_trace_##name(ftrace_profile_##name); \ |
| } \ |
| \ |
| static notrace void \ |
| ftrace_profile_disable_##name(struct ftrace_event_call *unused) \ |
| { \ |
| unregister_trace_##name(ftrace_profile_##name); \ |
| } |
| |
| #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 */ |
| |
| /* |
| * Stage 4 of the trace events. |
| * |
| * Override the macros in <trace/trace_events.h> to include the following: |
| * |
| * static void ftrace_event_<call>(proto) |
| * { |
| * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
| * } |
| * |
| * static int ftrace_reg_event_<call>(struct ftrace_event_call *unused) |
| * { |
| * return register_trace_<call>(ftrace_event_<call>); |
| * } |
| * |
| * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused) |
| * { |
| * unregister_trace_<call>(ftrace_event_<call>); |
| * } |
| * |
| * |
| * For those macros defined with TRACE_EVENT: |
| * |
| * static struct ftrace_event_call event_<call>; |
| * |
| * static void ftrace_raw_event_<call>(proto) |
| * { |
| * struct ring_buffer_event *event; |
| * struct ftrace_raw_<call> *entry; <-- defined in stage 1 |
| * struct ring_buffer *buffer; |
| * unsigned long irq_flags; |
| * int pc; |
| * |
| * local_save_flags(irq_flags); |
| * pc = preempt_count(); |
| * |
| * event = trace_current_buffer_lock_reserve(&buffer, |
| * event_<call>.id, |
| * sizeof(struct ftrace_raw_<call>), |
| * irq_flags, pc); |
| * if (!event) |
| * return; |
| * entry = ring_buffer_event_data(event); |
| * |
| * <assign>; <-- Here we assign the entries by the __field and |
| * __array macros. |
| * |
| * trace_current_buffer_unlock_commit(buffer, event, irq_flags, pc); |
| * } |
| * |
| * static int ftrace_raw_reg_event_<call>(struct ftrace_event_call *unused) |
| * { |
| * int ret; |
| * |
| * ret = register_trace_<call>(ftrace_raw_event_<call>); |
| * if (!ret) |
| * pr_info("event trace: Could not activate trace point " |
| * "probe to <call>"); |
| * return ret; |
| * } |
| * |
| * static void ftrace_unreg_event_<call>(struct ftrace_event_call *unused) |
| * { |
| * unregister_trace_<call>(ftrace_raw_event_<call>); |
| * } |
| * |
| * static struct trace_event ftrace_event_type_<call> = { |
| * .trace = ftrace_raw_output_<call>, <-- stage 2 |
| * }; |
| * |
| * static struct ftrace_event_call __used |
| * __attribute__((__aligned__(4))) |
| * __attribute__((section("_ftrace_events"))) event_<call> = { |
| * .name = "<call>", |
| * .system = "<system>", |
| * .raw_init = trace_event_raw_init, |
| * .regfunc = ftrace_reg_event_<call>, |
| * .unregfunc = ftrace_unreg_event_<call>, |
| * } |
| * |
| */ |
| |
| #ifdef CONFIG_PERF_EVENTS |
| |
| #define _TRACE_PROFILE_INIT(call) \ |
| .profile_enable = ftrace_profile_enable_##call, \ |
| .profile_disable = ftrace_profile_disable_##call, |
| |
| #else |
| #define _TRACE_PROFILE_INIT(call) |
| #endif /* CONFIG_PERF_EVENTS */ |
| |
| #undef __entry |
| #define __entry entry |
| |
| #undef __field |
| #define __field(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); |
| |
| #undef TP_fast_assign |
| #define TP_fast_assign(args...) args |
| |
| #undef TP_perf_assign |
| #define TP_perf_assign(args...) |
| |
| #undef DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| \ |
| static notrace void \ |
| ftrace_raw_event_id_##call(struct ftrace_event_call *event_call, \ |
| proto) \ |
| { \ |
| struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
| struct ring_buffer_event *event; \ |
| struct ftrace_raw_##call *entry; \ |
| struct ring_buffer *buffer; \ |
| unsigned long irq_flags; \ |
| int __data_size; \ |
| int pc; \ |
| \ |
| local_save_flags(irq_flags); \ |
| pc = preempt_count(); \ |
| \ |
| __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
| \ |
| event = trace_current_buffer_lock_reserve(&buffer, \ |
| event_call->id, \ |
| sizeof(*entry) + __data_size, \ |
| irq_flags, pc); \ |
| if (!event) \ |
| return; \ |
| entry = ring_buffer_event_data(event); \ |
| \ |
| \ |
| tstruct \ |
| \ |
| { assign; } \ |
| \ |
| if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
| trace_nowake_buffer_unlock_commit(buffer, \ |
| event, irq_flags, pc); \ |
| } |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, call, proto, args) \ |
| \ |
| static notrace void ftrace_raw_event_##call(proto) \ |
| { \ |
| ftrace_raw_event_id_##template(&event_##call, args); \ |
| } \ |
| \ |
| static notrace int \ |
| ftrace_raw_reg_event_##call(struct ftrace_event_call *unused) \ |
| { \ |
| return register_trace_##call(ftrace_raw_event_##call); \ |
| } \ |
| \ |
| static notrace void \ |
| ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused) \ |
| { \ |
| unregister_trace_##call(ftrace_raw_event_##call); \ |
| } \ |
| \ |
| static struct trace_event ftrace_event_type_##call = { \ |
| .trace = ftrace_raw_output_##call, \ |
| }; |
| |
| #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) |
| |
| #undef __entry |
| #define __entry REC |
| |
| #undef __print_flags |
| #undef __print_symbolic |
| #undef __get_dynamic_array |
| #undef __get_str |
| |
| #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) \ |
| static const char print_fmt_##call[] = print; |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, call, proto, args) \ |
| \ |
| static struct ftrace_event_call __used \ |
| __attribute__((__aligned__(4))) \ |
| __attribute__((section("_ftrace_events"))) event_##call = { \ |
| .name = #call, \ |
| .system = __stringify(TRACE_SYSTEM), \ |
| .event = &ftrace_event_type_##call, \ |
| .raw_init = trace_event_raw_init, \ |
| .regfunc = ftrace_raw_reg_event_##call, \ |
| .unregfunc = ftrace_raw_unreg_event_##call, \ |
| .print_fmt = print_fmt_##template, \ |
| .define_fields = ftrace_define_fields_##template, \ |
| _TRACE_PROFILE_INIT(call) \ |
| } |
| |
| #undef DEFINE_EVENT_PRINT |
| #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ |
| \ |
| static const char print_fmt_##call[] = print; \ |
| \ |
| static struct ftrace_event_call __used \ |
| __attribute__((__aligned__(4))) \ |
| __attribute__((section("_ftrace_events"))) event_##call = { \ |
| .name = #call, \ |
| .system = __stringify(TRACE_SYSTEM), \ |
| .event = &ftrace_event_type_##call, \ |
| .raw_init = trace_event_raw_init, \ |
| .regfunc = ftrace_raw_reg_event_##call, \ |
| .unregfunc = ftrace_raw_unreg_event_##call, \ |
| .print_fmt = print_fmt_##call, \ |
| .define_fields = ftrace_define_fields_##template, \ |
| _TRACE_PROFILE_INIT(call) \ |
| } |
| |
| #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| |
| /* |
| * Define the insertion callback to profile events |
| * |
| * The job is very similar to ftrace_raw_event_<call> except that we don't |
| * insert in the ring buffer but in a perf counter. |
| * |
| * static void ftrace_profile_<call>(proto) |
| * { |
| * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
| * struct ftrace_event_call *event_call = &event_<call>; |
| * extern void perf_tp_event(int, u64, u64, void *, int); |
| * struct ftrace_raw_##call *entry; |
| * struct perf_trace_buf *trace_buf; |
| * u64 __addr = 0, __count = 1; |
| * unsigned long irq_flags; |
| * struct trace_entry *ent; |
| * int __entry_size; |
| * int __data_size; |
| * int __cpu |
| * int pc; |
| * |
| * pc = preempt_count(); |
| * |
| * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
| * |
| * // Below we want to get the aligned size by taking into account |
| * // the u32 field that will later store the buffer size |
| * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), |
| * sizeof(u64)); |
| * __entry_size -= sizeof(u32); |
| * |
| * // Protect the non nmi buffer |
| * // This also protects the rcu read side |
| * local_irq_save(irq_flags); |
| * __cpu = smp_processor_id(); |
| * |
| * if (in_nmi()) |
| * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi); |
| * else |
| * trace_buf = rcu_dereference_sched(perf_trace_buf); |
| * |
| * if (!trace_buf) |
| * goto end; |
| * |
| * trace_buf = per_cpu_ptr(trace_buf, __cpu); |
| * |
| * // Avoid recursion from perf that could mess up the buffer |
| * if (trace_buf->recursion++) |
| * goto end_recursion; |
| * |
| * raw_data = trace_buf->buf; |
| * |
| * // Make recursion update visible before entering perf_tp_event |
| * // so that we protect from perf recursions. |
| * |
| * barrier(); |
| * |
| * //zero dead bytes from alignment to avoid stack leak to userspace: |
| * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; |
| * entry = (struct ftrace_raw_<call> *)raw_data; |
| * ent = &entry->ent; |
| * tracing_generic_entry_update(ent, irq_flags, pc); |
| * ent->type = event_call->id; |
| * |
| * <tstruct> <- do some jobs with dynamic arrays |
| * |
| * <assign> <- affect our values |
| * |
| * perf_tp_event(event_call->id, __addr, __count, entry, |
| * __entry_size); <- submit them to perf counter |
| * |
| * } |
| */ |
| |
| #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_str |
| #define __get_str(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 DECLARE_EVENT_CLASS |
| #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| static notrace void \ |
| ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \ |
| proto) \ |
| { \ |
| struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
| struct ftrace_raw_##call *entry; \ |
| u64 __addr = 0, __count = 1; \ |
| unsigned long irq_flags; \ |
| int __entry_size; \ |
| int __data_size; \ |
| int rctx; \ |
| \ |
| __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
| __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
| sizeof(u64)); \ |
| __entry_size -= sizeof(u32); \ |
| \ |
| if (WARN_ONCE(__entry_size > FTRACE_MAX_PROFILE_SIZE, \ |
| "profile buffer not large enough")) \ |
| return; \ |
| entry = (struct ftrace_raw_##call *)ftrace_perf_buf_prepare( \ |
| __entry_size, event_call->id, &rctx, &irq_flags); \ |
| if (!entry) \ |
| return; \ |
| tstruct \ |
| \ |
| { assign; } \ |
| \ |
| ftrace_perf_buf_submit(entry, __entry_size, rctx, __addr, \ |
| __count, irq_flags); \ |
| } |
| |
| #undef DEFINE_EVENT |
| #define DEFINE_EVENT(template, call, proto, args) \ |
| static notrace void ftrace_profile_##call(proto) \ |
| { \ |
| struct ftrace_event_call *event_call = &event_##call; \ |
| \ |
| ftrace_profile_templ_##template(event_call, args); \ |
| } |
| |
| #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 */ |
| |
| #undef _TRACE_PROFILE_INIT |
| |