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 18da4d0302SSteven Rostedt 19da4d0302SSteven Rostedt #undef TRACE_STRUCT 20da4d0302SSteven Rostedt #define TRACE_STRUCT(args...) args 21da4d0302SSteven Rostedt 2275db37d2SSteven Rostedt extern void __bad_type_size(void); 2375db37d2SSteven Rostedt 24da4d0302SSteven Rostedt #undef TRACE_FIELD 25da4d0302SSteven Rostedt #define TRACE_FIELD(type, item, assign) \ 2675db37d2SSteven Rostedt if (sizeof(type) != sizeof(field.item)) \ 2775db37d2SSteven Rostedt __bad_type_size(); \ 28da4d0302SSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ 29da4d0302SSteven Rostedt "offset:%u;\tsize:%u;\n", \ 30da4d0302SSteven Rostedt (unsigned int)offsetof(typeof(field), item), \ 31da4d0302SSteven Rostedt (unsigned int)sizeof(field.item)); \ 32da4d0302SSteven Rostedt if (!ret) \ 33da4d0302SSteven Rostedt return 0; 34da4d0302SSteven Rostedt 35da4d0302SSteven Rostedt 36da4d0302SSteven Rostedt #undef TRACE_FIELD_SPECIAL 37e1112b4dSTom Zanussi #define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \ 38da4d0302SSteven Rostedt ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \ 39da4d0302SSteven Rostedt "offset:%u;\tsize:%u;\n", \ 40da4d0302SSteven Rostedt (unsigned int)offsetof(typeof(field), item), \ 41da4d0302SSteven Rostedt (unsigned int)sizeof(field.item)); \ 42da4d0302SSteven Rostedt if (!ret) \ 43da4d0302SSteven Rostedt return 0; 44770cb243SSteven Rostedt 45770cb243SSteven Rostedt #undef TRACE_FIELD_ZERO_CHAR 46770cb243SSteven Rostedt #define TRACE_FIELD_ZERO_CHAR(item) \ 47770cb243SSteven Rostedt ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \ 48156b5f17SSteven Rostedt "offset:%u;\tsize:0;\n", \ 49156b5f17SSteven Rostedt (unsigned int)offsetof(typeof(field), item)); \ 50770cb243SSteven Rostedt if (!ret) \ 51770cb243SSteven Rostedt return 0; 52770cb243SSteven Rostedt 53770cb243SSteven Rostedt 542939b046SSteven Rostedt #undef TP_RAW_FMT 552939b046SSteven Rostedt #define TP_RAW_FMT(args...) args 56770cb243SSteven Rostedt 57770cb243SSteven Rostedt #undef TRACE_EVENT_FORMAT 58770cb243SSteven Rostedt #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 59770cb243SSteven Rostedt static int \ 60770cb243SSteven Rostedt ftrace_format_##call(struct trace_seq *s) \ 61770cb243SSteven Rostedt { \ 62770cb243SSteven Rostedt struct args field; \ 63770cb243SSteven Rostedt int ret; \ 64770cb243SSteven Rostedt \ 65770cb243SSteven Rostedt tstruct; \ 66770cb243SSteven Rostedt \ 67770cb243SSteven Rostedt trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \ 68770cb243SSteven Rostedt \ 69770cb243SSteven Rostedt return ret; \ 70770cb243SSteven Rostedt } 71770cb243SSteven Rostedt 72e45f2e2bSTom Zanussi #undef TRACE_EVENT_FORMAT_NOFILTER 73e45f2e2bSTom Zanussi #define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \ 74e45f2e2bSTom Zanussi tpfmt) \ 75e45f2e2bSTom Zanussi static int \ 76e45f2e2bSTom Zanussi ftrace_format_##call(struct trace_seq *s) \ 77e45f2e2bSTom Zanussi { \ 78e45f2e2bSTom Zanussi struct args field; \ 79e45f2e2bSTom Zanussi int ret; \ 80e45f2e2bSTom Zanussi \ 81e45f2e2bSTom Zanussi tstruct; \ 82e45f2e2bSTom Zanussi \ 83e45f2e2bSTom Zanussi trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \ 84e45f2e2bSTom Zanussi \ 85e45f2e2bSTom Zanussi return ret; \ 86e45f2e2bSTom Zanussi } 87e45f2e2bSTom Zanussi 88770cb243SSteven Rostedt #include "trace_event_types.h" 89770cb243SSteven Rostedt 90770cb243SSteven Rostedt #undef TRACE_ZERO_CHAR 91770cb243SSteven Rostedt #define TRACE_ZERO_CHAR(arg) 92770cb243SSteven Rostedt 93770cb243SSteven Rostedt #undef TRACE_FIELD 94770cb243SSteven Rostedt #define TRACE_FIELD(type, item, assign)\ 95770cb243SSteven Rostedt entry->item = assign; 96770cb243SSteven Rostedt 97770cb243SSteven Rostedt #undef TRACE_FIELD 98770cb243SSteven Rostedt #define TRACE_FIELD(type, item, assign)\ 99770cb243SSteven Rostedt entry->item = assign; 100770cb243SSteven Rostedt 1012939b046SSteven Rostedt #undef TP_CMD 1022939b046SSteven Rostedt #define TP_CMD(cmd...) cmd 103770cb243SSteven Rostedt 104770cb243SSteven Rostedt #undef TRACE_ENTRY 105770cb243SSteven Rostedt #define TRACE_ENTRY entry 106770cb243SSteven Rostedt 107770cb243SSteven Rostedt #undef TRACE_FIELD_SPECIAL 108e1112b4dSTom Zanussi #define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \ 109770cb243SSteven Rostedt cmd; 110770cb243SSteven Rostedt 111770cb243SSteven Rostedt #undef TRACE_EVENT_FORMAT 112770cb243SSteven Rostedt #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 113e1112b4dSTom Zanussi int ftrace_define_fields_##call(void); \ 114e1112b4dSTom Zanussi static int ftrace_raw_init_event_##call(void); \ 115770cb243SSteven Rostedt \ 116e1112b4dSTom Zanussi struct ftrace_event_call __used \ 117770cb243SSteven Rostedt __attribute__((__aligned__(4))) \ 118770cb243SSteven Rostedt __attribute__((section("_ftrace_events"))) event_##call = { \ 119770cb243SSteven Rostedt .name = #call, \ 120770cb243SSteven Rostedt .id = proto, \ 121770cb243SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 122e1112b4dSTom Zanussi .raw_init = ftrace_raw_init_event_##call, \ 123770cb243SSteven Rostedt .show_format = ftrace_format_##call, \ 124e1112b4dSTom Zanussi .define_fields = ftrace_define_fields_##call, \ 125e1112b4dSTom Zanussi }; \ 126e1112b4dSTom Zanussi static int ftrace_raw_init_event_##call(void) \ 127e1112b4dSTom Zanussi { \ 128e1112b4dSTom Zanussi INIT_LIST_HEAD(&event_##call.fields); \ 1290a19e53cSTom Zanussi init_preds(&event_##call); \ 130e1112b4dSTom Zanussi return 0; \ 131e1112b4dSTom Zanussi } \ 132e1112b4dSTom Zanussi 133e45f2e2bSTom Zanussi #undef TRACE_EVENT_FORMAT_NOFILTER 134e45f2e2bSTom Zanussi #define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \ 135e45f2e2bSTom Zanussi tpfmt) \ 136e45f2e2bSTom Zanussi \ 137e45f2e2bSTom Zanussi struct ftrace_event_call __used \ 138e45f2e2bSTom Zanussi __attribute__((__aligned__(4))) \ 139e45f2e2bSTom Zanussi __attribute__((section("_ftrace_events"))) event_##call = { \ 140e45f2e2bSTom Zanussi .name = #call, \ 141e45f2e2bSTom Zanussi .id = proto, \ 142e45f2e2bSTom Zanussi .system = __stringify(TRACE_SYSTEM), \ 143e45f2e2bSTom Zanussi .show_format = ftrace_format_##call, \ 144e45f2e2bSTom Zanussi }; 145e45f2e2bSTom Zanussi 146e1112b4dSTom Zanussi #include "trace_event_types.h" 147e1112b4dSTom Zanussi 148e1112b4dSTom Zanussi #undef TRACE_FIELD 149e1112b4dSTom Zanussi #define TRACE_FIELD(type, item, assign) \ 150e1112b4dSTom Zanussi ret = trace_define_field(event_call, #type, #item, \ 151e1112b4dSTom Zanussi offsetof(typeof(field), item), \ 152e1112b4dSTom Zanussi sizeof(field.item)); \ 153e1112b4dSTom Zanussi if (ret) \ 154e1112b4dSTom Zanussi return ret; 155e1112b4dSTom Zanussi 156e1112b4dSTom Zanussi #undef TRACE_FIELD_SPECIAL 157e1112b4dSTom Zanussi #define TRACE_FIELD_SPECIAL(type, item, len, cmd) \ 158e1112b4dSTom Zanussi ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 159e1112b4dSTom Zanussi offsetof(typeof(field), item), \ 160e1112b4dSTom Zanussi sizeof(field.item)); \ 161e1112b4dSTom Zanussi if (ret) \ 162e1112b4dSTom Zanussi return ret; 163e1112b4dSTom Zanussi 164e1112b4dSTom Zanussi #undef TRACE_FIELD_ZERO_CHAR 165e1112b4dSTom Zanussi #define TRACE_FIELD_ZERO_CHAR(item) 166e1112b4dSTom Zanussi 167e1112b4dSTom Zanussi #undef TRACE_EVENT_FORMAT 168e1112b4dSTom Zanussi #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 169e1112b4dSTom Zanussi int \ 170e1112b4dSTom Zanussi ftrace_define_fields_##call(void) \ 171e1112b4dSTom Zanussi { \ 172e1112b4dSTom Zanussi struct ftrace_event_call *event_call = &event_##call; \ 173e1112b4dSTom Zanussi struct args field; \ 174e1112b4dSTom Zanussi int ret; \ 175e1112b4dSTom Zanussi \ 176e1112b4dSTom Zanussi __common_field(unsigned char, type); \ 177e1112b4dSTom Zanussi __common_field(unsigned char, flags); \ 178e1112b4dSTom Zanussi __common_field(unsigned char, preempt_count); \ 179e1112b4dSTom Zanussi __common_field(int, pid); \ 180e1112b4dSTom Zanussi __common_field(int, tgid); \ 181e1112b4dSTom Zanussi \ 182e1112b4dSTom Zanussi tstruct; \ 183e1112b4dSTom Zanussi \ 184e1112b4dSTom Zanussi return ret; \ 185770cb243SSteven Rostedt } 186e1112b4dSTom Zanussi 187e45f2e2bSTom Zanussi #undef TRACE_EVENT_FORMAT_NOFILTER 188e45f2e2bSTom Zanussi #define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \ 189e45f2e2bSTom Zanussi tpfmt) 190e45f2e2bSTom Zanussi 191770cb243SSteven Rostedt #include "trace_event_types.h" 192