1770cb243SSteven Rostedt /* 2770cb243SSteven Rostedt * trace_export.c - export basic ftrace utilities to user space 3770cb243SSteven Rostedt * 4770cb243SSteven Rostedt * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> 5770cb243SSteven Rostedt */ 6770cb243SSteven Rostedt #include <linux/stringify.h> 7770cb243SSteven Rostedt #include <linux/kallsyms.h> 8770cb243SSteven Rostedt #include <linux/seq_file.h> 9770cb243SSteven Rostedt #include <linux/debugfs.h> 10770cb243SSteven Rostedt #include <linux/uaccess.h> 11770cb243SSteven Rostedt #include <linux/ftrace.h> 12770cb243SSteven Rostedt #include <linux/module.h> 13770cb243SSteven Rostedt #include <linux/init.h> 14770cb243SSteven Rostedt #include <linux/fs.h> 15770cb243SSteven Rostedt 16770cb243SSteven Rostedt #include "trace_output.h" 17770cb243SSteven Rostedt 184e5292eaSSteven Rostedt #undef TRACE_SYSTEM 194e5292eaSSteven Rostedt #define TRACE_SYSTEM ftrace 20da4d0302SSteven Rostedt 214e5292eaSSteven Rostedt /* not needed for this file */ 224e5292eaSSteven Rostedt #undef __field_struct 234e5292eaSSteven Rostedt #define __field_struct(type, item) 24da4d0302SSteven Rostedt 254e5292eaSSteven Rostedt #undef __field 2605ffa2d0SLi Zefan #define __field(type, item) type item; 2705ffa2d0SLi Zefan 2805ffa2d0SLi Zefan #undef __field_desc 2905ffa2d0SLi Zefan #define __field_desc(type, container, item) type item; 3005ffa2d0SLi Zefan 3105ffa2d0SLi Zefan #undef __array 3205ffa2d0SLi Zefan #define __array(type, item, size) type item[size]; 3305ffa2d0SLi Zefan 3405ffa2d0SLi Zefan #undef __array_desc 3505ffa2d0SLi Zefan #define __array_desc(type, container, item, size) type item[size]; 3605ffa2d0SLi Zefan 3705ffa2d0SLi Zefan #undef __dynamic_array 3805ffa2d0SLi Zefan #define __dynamic_array(type, item) type item[]; 3905ffa2d0SLi Zefan 4005ffa2d0SLi Zefan #undef F_STRUCT 4105ffa2d0SLi Zefan #define F_STRUCT(args...) args 4205ffa2d0SLi Zefan 4305ffa2d0SLi Zefan #undef F_printk 4405ffa2d0SLi Zefan #define F_printk(fmt, args...) fmt, args 4505ffa2d0SLi Zefan 4605ffa2d0SLi Zefan #undef FTRACE_ENTRY 4705ffa2d0SLi Zefan #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ 4805ffa2d0SLi Zefan struct ____ftrace_##name { \ 4905ffa2d0SLi Zefan tstruct \ 5005ffa2d0SLi Zefan }; \ 515e9b3972SLi Zefan static void __always_unused ____ftrace_check_##name(void) \ 5205ffa2d0SLi Zefan { \ 5305ffa2d0SLi Zefan struct ____ftrace_##name *__entry = NULL; \ 5405ffa2d0SLi Zefan \ 555e9b3972SLi Zefan /* force compile-time check on F_printk() */ \ 5605ffa2d0SLi Zefan printk(print); \ 5705ffa2d0SLi Zefan } 5805ffa2d0SLi Zefan 5905ffa2d0SLi Zefan #undef FTRACE_ENTRY_DUP 6005ffa2d0SLi Zefan #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \ 6105ffa2d0SLi Zefan FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) 6205ffa2d0SLi Zefan 6305ffa2d0SLi Zefan #include "trace_entries.h" 6405ffa2d0SLi Zefan 6505ffa2d0SLi Zefan 6605ffa2d0SLi Zefan #undef __field 674e5292eaSSteven Rostedt #define __field(type, item) \ 68da4d0302SSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ 6926a50744STom Zanussi "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \ 704e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 7126a50744STom Zanussi sizeof(field.item), is_signed_type(type)); \ 72da4d0302SSteven Rostedt if (!ret) \ 73da4d0302SSteven Rostedt return 0; 74da4d0302SSteven Rostedt 754e5292eaSSteven Rostedt #undef __field_desc 764e5292eaSSteven Rostedt #define __field_desc(type, container, item) \ 774e5292eaSSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ 7826a50744STom Zanussi "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \ 794e5292eaSSteven Rostedt offsetof(typeof(field), container.item), \ 8026a50744STom Zanussi sizeof(field.container.item), \ 8126a50744STom Zanussi is_signed_type(type)); \ 82da4d0302SSteven Rostedt if (!ret) \ 83da4d0302SSteven Rostedt return 0; 84770cb243SSteven Rostedt 854e5292eaSSteven Rostedt #undef __array 864e5292eaSSteven Rostedt #define __array(type, item, len) \ 874e5292eaSSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ 8826a50744STom Zanussi "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \ 894e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 9026a50744STom Zanussi sizeof(field.item), is_signed_type(type)); \ 91770cb243SSteven Rostedt if (!ret) \ 92770cb243SSteven Rostedt return 0; 93770cb243SSteven Rostedt 944e5292eaSSteven Rostedt #undef __array_desc 954e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) \ 964e5292eaSSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ 9726a50744STom Zanussi "offset:%zu;\tsize:%zu;\tsigned:%u;\n", \ 984e5292eaSSteven Rostedt offsetof(typeof(field), container.item), \ 9926a50744STom Zanussi sizeof(field.container.item), \ 10026a50744STom Zanussi is_signed_type(type)); \ 1014e5292eaSSteven Rostedt if (!ret) \ 1024e5292eaSSteven Rostedt return 0; 103770cb243SSteven Rostedt 1044e5292eaSSteven Rostedt #undef __dynamic_array 1054e5292eaSSteven Rostedt #define __dynamic_array(type, item) \ 1064e5292eaSSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ 10726a50744STom Zanussi "offset:%zu;\tsize:0;\tsigned:%u;\n", \ 10826a50744STom Zanussi offsetof(typeof(field), item), \ 10926a50744STom Zanussi is_signed_type(type)); \ 1104e5292eaSSteven Rostedt if (!ret) \ 1114e5292eaSSteven Rostedt return 0; 112770cb243SSteven Rostedt 1134e5292eaSSteven Rostedt #undef F_printk 1144e5292eaSSteven Rostedt #define F_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) 1154e5292eaSSteven Rostedt 1164e5292eaSSteven Rostedt #undef __entry 1174e5292eaSSteven Rostedt #define __entry REC 1184e5292eaSSteven Rostedt 1194e5292eaSSteven Rostedt #undef FTRACE_ENTRY 1204e5292eaSSteven Rostedt #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ 121770cb243SSteven Rostedt static int \ 1224e5292eaSSteven Rostedt ftrace_format_##name(struct ftrace_event_call *unused, \ 123e8f9f4d7SFrederic Weisbecker struct trace_seq *s) \ 124770cb243SSteven Rostedt { \ 1254e5292eaSSteven Rostedt struct struct_name field __attribute__((unused)); \ 1264e5292eaSSteven Rostedt int ret = 0; \ 127770cb243SSteven Rostedt \ 128770cb243SSteven Rostedt tstruct; \ 129770cb243SSteven Rostedt \ 1304e5292eaSSteven Rostedt trace_seq_printf(s, "\nprint fmt: " print); \ 131770cb243SSteven Rostedt \ 132770cb243SSteven Rostedt return ret; \ 133770cb243SSteven Rostedt } 134770cb243SSteven Rostedt 1354e5292eaSSteven Rostedt #include "trace_entries.h" 1364e5292eaSSteven Rostedt 1374e5292eaSSteven Rostedt #undef __field 1384e5292eaSSteven Rostedt #define __field(type, item) \ 1394e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 1404e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 1414e5292eaSSteven Rostedt sizeof(field.item), \ 1424e5292eaSSteven Rostedt is_signed_type(type), FILTER_OTHER); \ 1434e5292eaSSteven Rostedt if (ret) \ 1444e5292eaSSteven Rostedt return ret; 1454e5292eaSSteven Rostedt 1464e5292eaSSteven Rostedt #undef __field_desc 1474e5292eaSSteven Rostedt #define __field_desc(type, container, item) \ 1484e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type, #item, \ 1494e5292eaSSteven Rostedt offsetof(typeof(field), \ 1504e5292eaSSteven Rostedt container.item), \ 1514e5292eaSSteven Rostedt sizeof(field.container.item), \ 1524e5292eaSSteven Rostedt is_signed_type(type), FILTER_OTHER); \ 1534e5292eaSSteven Rostedt if (ret) \ 1544e5292eaSSteven Rostedt return ret; 1554e5292eaSSteven Rostedt 1564e5292eaSSteven Rostedt #undef __array 1574e5292eaSSteven Rostedt #define __array(type, item, len) \ 1584e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 1594e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 1604e5292eaSSteven Rostedt offsetof(typeof(field), item), \ 161fb7ae981SLai Jiangshan sizeof(field.item), \ 162fb7ae981SLai Jiangshan is_signed_type(type), FILTER_OTHER); \ 1634e5292eaSSteven Rostedt if (ret) \ 1644e5292eaSSteven Rostedt return ret; 1654e5292eaSSteven Rostedt 1664e5292eaSSteven Rostedt #undef __array_desc 1674e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) \ 1684e5292eaSSteven Rostedt BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ 1694e5292eaSSteven Rostedt ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 1704e5292eaSSteven Rostedt offsetof(typeof(field), \ 1714e5292eaSSteven Rostedt container.item), \ 172fb7ae981SLai Jiangshan sizeof(field.container.item), \ 173fb7ae981SLai Jiangshan is_signed_type(type), FILTER_OTHER); \ 1744e5292eaSSteven Rostedt if (ret) \ 1754e5292eaSSteven Rostedt return ret; 1764e5292eaSSteven Rostedt 1774e5292eaSSteven Rostedt #undef __dynamic_array 178809826a3SLai Jiangshan #define __dynamic_array(type, item) \ 179809826a3SLai Jiangshan ret = trace_define_field(event_call, #type, #item, \ 180809826a3SLai Jiangshan offsetof(typeof(field), item), \ 181809826a3SLai Jiangshan 0, is_signed_type(type), FILTER_OTHER);\ 182809826a3SLai Jiangshan if (ret) \ 183809826a3SLai Jiangshan return ret; 1844e5292eaSSteven Rostedt 1854e5292eaSSteven Rostedt #undef FTRACE_ENTRY 1864e5292eaSSteven Rostedt #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ 1874e5292eaSSteven Rostedt int \ 1884e5292eaSSteven Rostedt ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ 189e45f2e2bSTom Zanussi { \ 1904e5292eaSSteven Rostedt struct struct_name field; \ 191e45f2e2bSTom Zanussi int ret; \ 192e45f2e2bSTom Zanussi \ 1934e5292eaSSteven Rostedt tstruct; \ 194e45f2e2bSTom Zanussi \ 195e45f2e2bSTom Zanussi return ret; \ 196e45f2e2bSTom Zanussi } 197e45f2e2bSTom Zanussi 1984e5292eaSSteven Rostedt #include "trace_entries.h" 1994e5292eaSSteven Rostedt 200d7a4b414SFrederic Weisbecker static int ftrace_raw_init_event(struct ftrace_event_call *call) 201d7a4b414SFrederic Weisbecker { 202d7a4b414SFrederic Weisbecker INIT_LIST_HEAD(&call->fields); 203d7a4b414SFrederic Weisbecker return 0; 204d7a4b414SFrederic Weisbecker } 2054e5292eaSSteven Rostedt 2064e5292eaSSteven Rostedt #undef __field 2074e5292eaSSteven Rostedt #define __field(type, item) 2084e5292eaSSteven Rostedt 2094e5292eaSSteven Rostedt #undef __field_desc 2104e5292eaSSteven Rostedt #define __field_desc(type, container, item) 2114e5292eaSSteven Rostedt 2124e5292eaSSteven Rostedt #undef __array 2134e5292eaSSteven Rostedt #define __array(type, item, len) 2144e5292eaSSteven Rostedt 2154e5292eaSSteven Rostedt #undef __array_desc 2164e5292eaSSteven Rostedt #define __array_desc(type, container, item, len) 2174e5292eaSSteven Rostedt 2184e5292eaSSteven Rostedt #undef __dynamic_array 2194e5292eaSSteven Rostedt #define __dynamic_array(type, item) 2204e5292eaSSteven Rostedt 2214e5292eaSSteven Rostedt #undef FTRACE_ENTRY 2224e5292eaSSteven Rostedt #define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \ 223770cb243SSteven Rostedt \ 224e1112b4dSTom Zanussi struct ftrace_event_call __used \ 225770cb243SSteven Rostedt __attribute__((__aligned__(4))) \ 226770cb243SSteven Rostedt __attribute__((section("_ftrace_events"))) event_##call = { \ 227770cb243SSteven Rostedt .name = #call, \ 2284e5292eaSSteven Rostedt .id = type, \ 229770cb243SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 230d7a4b414SFrederic Weisbecker .raw_init = ftrace_raw_init_event, \ 231770cb243SSteven Rostedt .show_format = ftrace_format_##call, \ 232e1112b4dSTom Zanussi .define_fields = ftrace_define_fields_##call, \ 233e1112b4dSTom Zanussi }; \ 234e1112b4dSTom Zanussi 2354e5292eaSSteven Rostedt #include "trace_entries.h" 236