litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'include/linux/i2o-dev.h')

0 files changed, 0 insertions, 0 deletions

/* * 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]; \ }; \ \ 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_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) #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)) #undef TRACE_EVENT_FLAGS #define TRACE_EVENT_FLAGS(event, flag) #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_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 __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 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 ftrace_event_call *event; \ struct trace_seq *s = &iter->seq; \ struct ftrace_raw_##call *field; \ struct trace_entry *entry; \ struct trace_seq *p = &iter->tmp_seq; \ int ret; \ \ event = container_of(trace_event, struct ftrace_event_call, \ event); \ \ entry = iter->ent; \ \ if (entry->type != event->event.type) { \ WARN_ON_ONCE(1); \ return TRACE_TYPE_UNHANDLED; \ } \ \ field = (typeof(field))entry; \ \ trace_seq_init(p); \ ret = trace_seq_printf(s, "%s: ", event->name); \ if (ret) \ ret = trace_seq_printf(s, print); \ if (!ret) \ return TRACE_TYPE_PARTIAL_LINE; \ \ return TRACE_TYPE_HANDLED; \ } \ 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 trace_seq *s = &iter->seq; \ struct ftrace_raw_##template *field; \ 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, print); \ if (!ret) \ return TRACE_TYPE_PARTIAL_LINE; \ \ return TRACE_TYPE_HANDLED; \ } \ 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 #define __field(type, item) __field_ext(type, item, FILTER_OTHER) #undef __array #define __array(type, item, len) \ do { \ mutex_lock(&event_storage_mutex); \ BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ snprintf(event_storage, sizeof(event_storage), \ "%s[%d]", #type, len); \ ret = trace_define_field(event_call, event_storage, #item, \ offsetof(typeof(field), item), \ sizeof(field.item), \ is_signed_type(type), FILTER_OTHER); \ mutex_unlock(&event_storage_mutex); \ 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 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) /* * 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_call *event_call = __data; * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; * 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; * * 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>->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 (!filter_current_check_discard(buffer, event_call, entry, event)) * trace_current_buffer_unlock_commit(buffer, * event, irq_flags, pc); * } * * static struct trace_event ftrace_event_type_<call> = { * .trace = ftrace_raw_output_<call>, <-- stage 2 * }; * * static const 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> = {


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