1 /* 2 * trace_export.c - export basic ftrace utilities to user space 3 * 4 * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> 5 */ 6 #include <linux/stringify.h> 7 #include <linux/kallsyms.h> 8 #include <linux/seq_file.h> 9 #include <linux/debugfs.h> 10 #include <linux/uaccess.h> 11 #include <linux/ftrace.h> 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/fs.h> 15 16 #include "trace_output.h" 17 18 #include "trace_format.h" 19 20 #undef TRACE_FIELD_ZERO_CHAR 21 #define TRACE_FIELD_ZERO_CHAR(item) \ 22 ret = trace_seq_printf(s, "\tfield: char " #item ";\t" \ 23 "offset:%lu;\tsize:0;\n", \ 24 offsetof(typeof(field), item)); \ 25 if (!ret) \ 26 return 0; 27 28 29 #undef TPRAWFMT 30 #define TPRAWFMT(args...) args 31 32 #undef TRACE_EVENT_FORMAT 33 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 34 static int \ 35 ftrace_format_##call(struct trace_seq *s) \ 36 { \ 37 struct args field; \ 38 int ret; \ 39 \ 40 tstruct; \ 41 \ 42 trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \ 43 \ 44 return ret; \ 45 } 46 47 #include "trace_event_types.h" 48 49 #undef TRACE_ZERO_CHAR 50 #define TRACE_ZERO_CHAR(arg) 51 52 #undef TRACE_FIELD 53 #define TRACE_FIELD(type, item, assign)\ 54 entry->item = assign; 55 56 #undef TRACE_FIELD 57 #define TRACE_FIELD(type, item, assign)\ 58 entry->item = assign; 59 60 #undef TPCMD 61 #define TPCMD(cmd...) cmd 62 63 #undef TRACE_ENTRY 64 #define TRACE_ENTRY entry 65 66 #undef TRACE_FIELD_SPECIAL 67 #define TRACE_FIELD_SPECIAL(type_item, item, cmd) \ 68 cmd; 69 70 #undef TRACE_EVENT_FORMAT 71 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ 72 \ 73 static struct ftrace_event_call __used \ 74 __attribute__((__aligned__(4))) \ 75 __attribute__((section("_ftrace_events"))) event_##call = { \ 76 .name = #call, \ 77 .id = proto, \ 78 .system = __stringify(TRACE_SYSTEM), \ 79 .show_format = ftrace_format_##call, \ 80 } 81 #include "trace_event_types.h" 82