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 33da4d0302SSteven Rostedt #define TRACE_FIELD_SPECIAL(type_item, item, 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 88770cb243SSteven Rostedt #define TRACE_FIELD_SPECIAL(type_item, item, cmd) \ 89770cb243SSteven Rostedt cmd; 90770cb243SSteven Rostedt 91770cb243SSteven Rostedt #undef TRACE_EVENT_FORMAT 92770cb243SSteven Rostedt #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 93770cb243SSteven Rostedt \ 94770cb243SSteven Rostedt static struct ftrace_event_call __used \ 95770cb243SSteven Rostedt __attribute__((__aligned__(4))) \ 96770cb243SSteven Rostedt __attribute__((section("_ftrace_events"))) event_##call = { \ 97770cb243SSteven Rostedt .name = #call, \ 98770cb243SSteven Rostedt .id = proto, \ 99770cb243SSteven Rostedt .system = __stringify(TRACE_SYSTEM), \ 100770cb243SSteven Rostedt .show_format = ftrace_format_##call, \ 101770cb243SSteven Rostedt } 102770cb243SSteven Rostedt #include "trace_event_types.h" 103