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 22da4d0302SSteven Rostedt #undef TRACE_FIELD 23da4d0302SSteven Rostedt #define TRACE_FIELD(type, item, assign) \ 24da4d0302SSteven Rostedt ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ 25da4d0302SSteven Rostedt "offset:%u;\tsize:%u;\n", \ 26da4d0302SSteven Rostedt (unsigned int)offsetof(typeof(field), item), \ 27da4d0302SSteven Rostedt (unsigned int)sizeof(field.item)); \ 28da4d0302SSteven Rostedt if (!ret) \ 29da4d0302SSteven Rostedt return 0; 30da4d0302SSteven Rostedt 31da4d0302SSteven Rostedt 32da4d0302SSteven Rostedt #undef TRACE_FIELD_SPECIAL 33e1112b4dSTom Zanussi #define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \ 34da4d0302SSteven Rostedt ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \ 35da4d0302SSteven Rostedt "offset:%u;\tsize:%u;\n", \ 36da4d0302SSteven Rostedt (unsigned int)offsetof(typeof(field), item), \ 37da4d0302SSteven Rostedt (unsigned int)sizeof(field.item)); \ 38da4d0302SSteven Rostedt if (!ret) \ 39da4d0302SSteven Rostedt return 0; 40770cb243SSteven Rostedt 41770cb243SSteven Rostedt #undef TRACE_FIELD_ZERO_CHAR 42770cb243SSteven Rostedt #define TRACE_FIELD_ZERO_CHAR(item) \ 43770cb243SSteven Rostedt ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \ 44156b5f17SSteven Rostedt "offset:%u;\tsize:0;\n", \ 45156b5f17SSteven Rostedt (unsigned int)offsetof(typeof(field), item)); \ 46770cb243SSteven Rostedt if (!ret) \ 47770cb243SSteven Rostedt return 0; 48770cb243SSteven Rostedt 49770cb243SSteven Rostedt 502939b046SSteven Rostedt #undef TP_RAW_FMT 512939b046SSteven Rostedt #define TP_RAW_FMT(args...) args 52770cb243SSteven Rostedt 53770cb243SSteven Rostedt #undef TRACE_EVENT_FORMAT 54770cb243SSteven Rostedt #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 55770cb243SSteven Rostedt static int \ 56770cb243SSteven Rostedt ftrace_format_##call(struct trace_seq *s) \ 57770cb243SSteven Rostedt { \ 58770cb243SSteven Rostedt struct args field; \ 59770cb243SSteven Rostedt int ret; \ 60770cb243SSteven Rostedt \ 61770cb243SSteven Rostedt tstruct; \ 62770cb243SSteven Rostedt \ 63770cb243SSteven Rostedt trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \ 64770cb243SSteven Rostedt \ 65770cb243SSteven Rostedt return ret; \ 66770cb243SSteven Rostedt } 67770cb243SSteven Rostedt 68770cb243SSteven Rostedt #include "trace_event_types.h" 69770cb243SSteven Rostedt 70770cb243SSteven Rostedt #undef TRACE_ZERO_CHAR 71770cb243SSteven Rostedt #define TRACE_ZERO_CHAR(arg) 72770cb243SSteven Rostedt 73770cb243SSteven Rostedt #undef TRACE_FIELD 74770cb243SSteven Rostedt #define TRACE_FIELD(type, item, assign)\ 75770cb243SSteven Rostedt entry->item = assign; 76770cb243SSteven Rostedt 77770cb243SSteven Rostedt #undef TRACE_FIELD 78770cb243SSteven Rostedt #define TRACE_FIELD(type, item, assign)\ 79770cb243SSteven Rostedt entry->item = assign; 80770cb243SSteven Rostedt 812939b046SSteven Rostedt #undef TP_CMD 822939b046SSteven Rostedt #define TP_CMD(cmd...) cmd 83770cb243SSteven Rostedt 84770cb243SSteven Rostedt #undef TRACE_ENTRY 85770cb243SSteven Rostedt #define TRACE_ENTRY entry 86770cb243SSteven Rostedt 87770cb243SSteven Rostedt #undef TRACE_FIELD_SPECIAL 88e1112b4dSTom Zanussi #define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \ 89770cb243SSteven Rostedt cmd; 90770cb243SSteven Rostedt 91770cb243SSteven Rostedt #undef TRACE_EVENT_FORMAT 92770cb243SSteven Rostedt #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 93e1112b4dSTom Zanussi int ftrace_define_fields_##call(void); \ 94e1112b4dSTom Zanussi static int ftrace_raw_init_event_##call(void); \ 95770cb243SSteven Rostedt \ 96e1112b4dSTom Zanussi struct ftrace_event_call __used \ 97770cb243SSteven Rostedt __attribute__((__aligned__(4))) \ 98770cb243SSteven Rostedt __attribute__((section("_ftrace_events"))) event_##call = { \ 99770cb243SSteven Rostedt .name = #call, \ 100770cb243SSteven Rostedt .id = proto, \ 101770cb243SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 102e1112b4dSTom Zanussi .raw_init = ftrace_raw_init_event_##call, \ 103770cb243SSteven Rostedt .show_format = ftrace_format_##call, \ 104e1112b4dSTom Zanussi .define_fields = ftrace_define_fields_##call, \ 105e1112b4dSTom Zanussi }; \ 106e1112b4dSTom Zanussi static int ftrace_raw_init_event_##call(void) \ 107e1112b4dSTom Zanussi { \ 108e1112b4dSTom Zanussi INIT_LIST_HEAD(&event_##call.fields); \ 109e1112b4dSTom Zanussi return 0; \ 110e1112b4dSTom Zanussi } \ 111e1112b4dSTom Zanussi 112e1112b4dSTom Zanussi #include "trace_event_types.h" 113e1112b4dSTom Zanussi 114e1112b4dSTom Zanussi #undef TRACE_FIELD 115e1112b4dSTom Zanussi #define TRACE_FIELD(type, item, assign) \ 116e1112b4dSTom Zanussi ret = trace_define_field(event_call, #type, #item, \ 117e1112b4dSTom Zanussi offsetof(typeof(field), item), \ 118e1112b4dSTom Zanussi sizeof(field.item)); \ 119e1112b4dSTom Zanussi if (ret) \ 120e1112b4dSTom Zanussi return ret; 121e1112b4dSTom Zanussi 122e1112b4dSTom Zanussi #undef TRACE_FIELD_SPECIAL 123e1112b4dSTom Zanussi #define TRACE_FIELD_SPECIAL(type, item, len, cmd) \ 124e1112b4dSTom Zanussi ret = trace_define_field(event_call, #type "[" #len "]", #item, \ 125e1112b4dSTom Zanussi offsetof(typeof(field), item), \ 126e1112b4dSTom Zanussi sizeof(field.item)); \ 127e1112b4dSTom Zanussi if (ret) \ 128e1112b4dSTom Zanussi return ret; 129e1112b4dSTom Zanussi 130e1112b4dSTom Zanussi #undef TRACE_FIELD_ZERO_CHAR 131e1112b4dSTom Zanussi #define TRACE_FIELD_ZERO_CHAR(item) 132e1112b4dSTom Zanussi 133e1112b4dSTom Zanussi #undef TRACE_EVENT_FORMAT 134e1112b4dSTom Zanussi #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 135e1112b4dSTom Zanussi int \ 136e1112b4dSTom Zanussi ftrace_define_fields_##call(void) \ 137e1112b4dSTom Zanussi { \ 138e1112b4dSTom Zanussi struct ftrace_event_call *event_call = &event_##call; \ 139e1112b4dSTom Zanussi struct args field; \ 140e1112b4dSTom Zanussi int ret; \ 141e1112b4dSTom Zanussi \ 142e1112b4dSTom Zanussi __common_field(unsigned char, type); \ 143e1112b4dSTom Zanussi __common_field(unsigned char, flags); \ 144e1112b4dSTom Zanussi __common_field(unsigned char, preempt_count); \ 145e1112b4dSTom Zanussi __common_field(int, pid); \ 146e1112b4dSTom Zanussi __common_field(int, tgid); \ 147e1112b4dSTom Zanussi \ 148e1112b4dSTom Zanussi tstruct; \ 149e1112b4dSTom Zanussi \ 150e1112b4dSTom Zanussi return ret; \ 151770cb243SSteven Rostedt } 152e1112b4dSTom Zanussi 153770cb243SSteven Rostedt #include "trace_event_types.h" 154