diff options
Diffstat (limited to 'kernel/include/trace/ftrace.h')
| -rw-r--r-- | kernel/include/trace/ftrace.h | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/kernel/include/trace/ftrace.h b/kernel/include/trace/ftrace.h new file mode 100644 index 000000000..37d4b10b1 --- /dev/null +++ b/kernel/include/trace/ftrace.h @@ -0,0 +1,859 @@ +/* + * 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> + +#ifndef TRACE_SYSTEM_VAR +#define TRACE_SYSTEM_VAR TRACE_SYSTEM +#endif + +#define __app__(x, y) str__##x##y +#define __app(x, y) __app__(x, y) + +#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name) + +#define TRACE_MAKE_SYSTEM_STR() \ + static const char TRACE_SYSTEM_STRING[] = \ + __stringify(TRACE_SYSTEM) + +TRACE_MAKE_SYSTEM_STR(); + +#undef TRACE_DEFINE_ENUM +#define TRACE_DEFINE_ENUM(a) \ + static struct trace_enum_map __used __initdata \ + __##TRACE_SYSTEM##_##a = \ + { \ + .system = TRACE_SYSTEM_STRING, \ + .enum_string = #a, \ + .enum_value = a \ + }; \ + static struct trace_enum_map __used \ + __attribute__((section("_ftrace_enum_map"))) \ + *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a + +/* + * 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 __field_struct +#define __field_struct(type, item) type item; + +#undef __field_struct_ext +#define __field_struct_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 __bitmask +#define __bitmask(item, nr_bits) __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]; \ + }; \ + \ + static struct ftrace_event_class event_class_##name; + +#undef DEFINE_EVENT +#define DEFINE_EVENT(template, name, proto, args) \ + static struct ftrace_event_call __used \ + __attribute__((__aligned__(4))) event_##name + +#undef DEFINE_EVENT_FN +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + +/* Callbacks are meaningless to ftrace. */ +#undef TRACE_EVENT_FN +#define TRACE_EVENT_FN(name, proto, args, tstruct, \ + assign, print, reg, unreg) \ + TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ + PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ + +#undef TRACE_EVENT_FLAGS +#define TRACE_EVENT_FLAGS(name, value) \ + __TRACE_EVENT_FLAGS(name, value) + +#undef TRACE_EVENT_PERF_PERM +#define TRACE_EVENT_PERF_PERM(name, expr...) \ + __TRACE_EVENT_PERF_PERM(name, expr) + +#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 TRACE_DEFINE_ENUM +#define TRACE_DEFINE_ENUM(a) + +#undef __field +#define __field(type, item) + +#undef __field_ext +#define __field_ext(type, item, filter_type) + +#undef __field_struct +#define __field_struct(type, item) + +#undef __field_struct_ext +#define __field_struct_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 __bitmask +#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, 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)) + +#undef TRACE_EVENT_FLAGS +#define TRACE_EVENT_FLAGS(event, flag) + +#undef TRACE_EVENT_PERF_PERM +#define TRACE_EVENT_PERF_PERM(event, expr...) + +#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 = &iter->tmp_seq; + * int ret; + * + * entry = iter->ent; + * + * if (entry->type != event_<call>->event.type) { + * WARN_ON_ONCE(1); + * return TRACE_TYPE_UNHANDLED; + * } + * + * field = (typeof(field))entry; + * + * trace_seq_init(p); + * ret = trace_seq_printf(s, "%s: ", <call>); + * if (ret) + * ret = trace_seq_printf(s, <TP_printk> "\n"); + * 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_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) \ + ({ \ + void *__bitmask = __get_dynamic_array(field); \ + unsigned int __bitmask_size; \ + __bitmask_size = __get_dynamic_array_len(field); \ + ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ + }) + +#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 __print_symbolic_u64 +#if BITS_PER_LONG == 32 +#define __print_symbolic_u64(value, symbol_array...) \ + ({ \ + static const struct trace_print_flags_u64 symbols[] = \ + { symbol_array, { -1, NULL } }; \ + ftrace_print_symbols_seq_u64(p, value, symbols); \ + }) +#else +#define __print_symbolic_u64(value, symbol_array...) \ + __print_symbolic(value, symbol_array) +#endif + +#undef __print_hex +#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) + +#undef __print_array +#define __print_array(array, count, el_size) \ + ({ \ + BUILD_BUG_ON(el_size != 1 && el_size != 2 && \ + el_size != 4 && el_size != 8); \ + ftrace_print_array_seq(p, array, count, el_size); \ + }) + +#undef DECLARE_EVENT_CLASS +#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ +static notrace enum print_line_t \ +ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ + struct trace_event *trace_event) \ +{ \ + struct trace_seq *s = &iter->seq; \ + struct trace_seq __maybe_unused *p = &iter->tmp_seq; \ + struct ftrace_raw_##call *field; \ + int ret; \ + \ + field = (typeof(field))iter->ent; \ + \ + ret = ftrace_raw_output_prep(iter, trace_event); \ + if (ret != TRACE_TYPE_HANDLED) \ + return ret; \ + \ + trace_seq_printf(s, print); \ + \ + return trace_handle_return(s); \ +} \ +static struct trace_event_functions ftrace_event_type_funcs_##call = { \ + .trace = ftrace_raw_output_##call, \ +}; + +#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_event *event) \ +{ \ + struct ftrace_raw_##template *field; \ + struct trace_entry *entry; \ + struct trace_seq *p = &iter->tmp_seq; \ + \ + entry = iter->ent; \ + \ + if (entry->type != event_##call.event.type) { \ + WARN_ON_ONCE(1); \ + return TRACE_TYPE_UNHANDLED; \ + } \ + \ + field = (typeof(field))entry; \ + \ + trace_seq_init(p); \ + return ftrace_output_call(iter, #call, print); \ +} \ +static struct trace_event_functions ftrace_event_type_funcs_##call = { \ + .trace = ftrace_raw_output_##call, \ +}; + +#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_struct_ext +#define __field_struct_ext(type, item, filter_type) \ + ret = trace_define_field(event_call, #type, #item, \ + offsetof(typeof(field), item), \ + sizeof(field.item), \ + 0, filter_type); \ + if (ret) \ + return ret; + +#undef __field +#define __field(type, item) __field_ext(type, item, FILTER_OTHER) + +#undef __field_struct +#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER) + +#undef __array +#define __array(type, item, len) \ + do { \ + char *type_str = #type"["__stringify(len)"]"; \ + BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ + ret = trace_define_field(event_call, type_str, #item, \ + offsetof(typeof(field), item), \ + sizeof(field.item), \ + is_signed_type(type), FILTER_OTHER); \ + if (ret) \ + return ret; \ + } while (0); + +#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 __bitmask +#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) + +#undef DECLARE_EVENT_CLASS +#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ +static int notrace __init \ +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 __field_struct +#define __field_struct(type, item) + +#undef __field_struct_ext +#define __field_struct_ext(type, item, filter_type) + +#undef __array +#define __array(type, item, len) + +#undef __dynamic_array +#define __dynamic_array(type, item, len) \ + __item_length = (len) * sizeof(type); \ + __data_offsets->item = __data_size + \ + offsetof(typeof(*entry), __data); \ + __data_offsets->item |= __item_length << 16; \ + __data_size += __item_length; + +#undef __string +#define __string(item, src) __dynamic_array(char, item, \ + strlen((src) ? (const char *)(src) : "(null)") + 1) + +/* + * __bitmask_size_in_bytes_raw is the number of bytes needed to hold + * num_possible_cpus(). + */ +#define __bitmask_size_in_bytes_raw(nr_bits) \ + (((nr_bits) + 7) / 8) + +#define __bitmask_size_in_longs(nr_bits) \ + ((__bitmask_size_in_bytes_raw(nr_bits) + \ + ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8)) + +/* + * __bitmask_size_in_bytes is the number of bytes needed to hold + * num_possible_cpus() padded out to the nearest long. This is what + * is saved in the buffer, just to be consistent. + */ +#define __bitmask_size_in_bytes(nr_bits) \ + (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8)) + +#undef __bitmask +#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ + __bitmask_size_in_longs(nr_bits)) + +#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; \ + int __maybe_unused __item_length; \ + 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) + +/* + * 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 ftrace_event_call event_<call>; + * + * static void ftrace_raw_event_<call>(void *__data, proto) + * { + * struct ftrace_event_file *ftrace_file = __data; + * struct ftrace_event_call *event_call = ftrace_file->event_call; + * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; + * unsigned long eflags = ftrace_file->flags; + * enum event_trigger_type __tt = ETT_NONE; + * struct ring_buffer_event *event; + * struct ftrace_raw_<call> *entry; <-- defined in stage 1 + * struct ring_buffer *buffer; + * unsigned long irq_flags; + * int __data_size; + * int pc; + * + * if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) { + * if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE) + * event_triggers_call(ftrace_file, NULL); + * if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED) + * return; + * } + * + * local_save_flags(irq_flags); + * pc = preempt_count(); + * + * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); + * + * event = trace_event_buffer_lock_reserve(&buffer, ftrace_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 & FTRACE_EVENT_FL_TRIGGER_COND) + * __tt = event_triggers_call(ftrace_file, entry); + * + * if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, + * &ftrace_file->flags)) + * ring_buffer_discard_commit(buffer, event); + * else if (!filter_check_discard(ftrace_file, entry, buffer, event)) + * trace_buffer_unlock_commit(buffer, event, irq_flags, pc); + * + * if (__tt) + * event_triggers_post_call(ftrace_file, __tt); + * } + * + * static struct trace_event ftrace_event_type_<call> = { + * .trace = ftrace_raw_output_<call>, <-- stage 2 + * }; + * + * static char print_fmt_<call>[] = <TP_printk>; + * + * static struct ftrace_event_class __used event_class_<template> = { + * .system = "<system>", + * .define_fields = ftrace_define_fields_<call>, + * .fields = LIST_HEAD_INIT(event_class_##call.fields), + * .raw_init = trace_event_raw_init, + * .probe = ftrace_raw_event_##call, + * .reg = ftrace_event_reg, + * }; + * + * static struct ftrace_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 ftrace_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 \ +ftrace_raw_event_##call(void *__data, proto) \ +{ \ + struct ftrace_event_file *ftrace_file = __data; \ + struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ + struct ftrace_event_buffer fbuffer; \ + struct ftrace_raw_##call *entry; \ + int __data_size; \ + \ + if (ftrace_trigger_soft_disabled(ftrace_file)) \ + return; \ + \ + __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ + \ + entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file, \ + sizeof(*entry) + __data_size); \ + \ + if (!entry) \ + return; \ + \ + tstruct \ + \ + { assign; } \ + \ + ftrace_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(ftrace_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 ftrace_event_class __used __refdata event_class_##call = { \ + .system = TRACE_SYSTEM_STRING, \ + .define_fields = ftrace_define_fields_##call, \ + .fields = LIST_HEAD_INIT(event_class_##call.fields),\ + .raw_init = trace_event_raw_init, \ + .probe = ftrace_raw_event_##call, \ + .reg = ftrace_event_reg, \ + _TRACE_PERF_INIT(call) \ +}; + +#undef DEFINE_EVENT +#define DEFINE_EVENT(template, call, proto, args) \ + \ +static struct ftrace_event_call __used event_##call = { \ + .class = &event_class_##template, \ + { \ + .tp = &__tracepoint_##call, \ + }, \ + .event.funcs = &ftrace_event_type_funcs_##template, \ + .print_fmt = print_fmt_##template, \ + .flags = TRACE_EVENT_FL_TRACEPOINT, \ +}; \ +static struct ftrace_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 ftrace_event_call __used event_##call = { \ + .class = &event_class_##template, \ + { \ + .tp = &__tracepoint_##call, \ + }, \ + .event.funcs = &ftrace_event_type_funcs_##call, \ + .print_fmt = print_fmt_##call, \ + .flags = TRACE_EVENT_FL_TRACEPOINT, \ +}; \ +static struct ftrace_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 ftrace_event_call *event_call = __data; \ + struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ + struct ftrace_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 = ftrace_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 */ + |