blob: 07a22c33ebf3c31b4d07b7125a9062118ca90490 [file] [log] [blame]
Steven Rostedt770cb242009-03-05 21:35:29 -05001/*
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
Steven Rostedtda4d0302009-03-09 17:14:30 -040018
19#undef TRACE_STRUCT
20#define TRACE_STRUCT(args...) args
21
22#undef TRACE_FIELD
23#define TRACE_FIELD(type, item, assign) \
24 ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
25 "offset:%u;\tsize:%u;\n", \
26 (unsigned int)offsetof(typeof(field), item), \
27 (unsigned int)sizeof(field.item)); \
28 if (!ret) \
29 return 0;
30
31
32#undef TRACE_FIELD_SPECIAL
33#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
34 ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \
35 "offset:%u;\tsize:%u;\n", \
36 (unsigned int)offsetof(typeof(field), item), \
37 (unsigned int)sizeof(field.item)); \
38 if (!ret) \
39 return 0;
Steven Rostedt770cb242009-03-05 21:35:29 -050040
41#undef TRACE_FIELD_ZERO_CHAR
Steven Rostedt156b5f12009-03-06 10:50:53 -050042#define TRACE_FIELD_ZERO_CHAR(item) \
Zhaolei1bbe2a82009-04-03 18:24:46 +080043 ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \
Steven Rostedt156b5f12009-03-06 10:50:53 -050044 "offset:%u;\tsize:0;\n", \
45 (unsigned int)offsetof(typeof(field), item)); \
46 if (!ret) \
Steven Rostedt770cb242009-03-05 21:35:29 -050047 return 0;
48
49
Steven Rostedt2939b042009-03-09 15:47:18 -040050#undef TP_RAW_FMT
51#define TP_RAW_FMT(args...) args
Steven Rostedt770cb242009-03-05 21:35:29 -050052
53#undef TRACE_EVENT_FORMAT
54#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
55static int \
56ftrace_format_##call(struct trace_seq *s) \
57{ \
58 struct args field; \
59 int ret; \
60 \
61 tstruct; \
62 \
63 trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
64 \
65 return ret; \
66}
67
68#include "trace_event_types.h"
69
70#undef TRACE_ZERO_CHAR
71#define TRACE_ZERO_CHAR(arg)
72
73#undef TRACE_FIELD
74#define TRACE_FIELD(type, item, assign)\
75 entry->item = assign;
76
77#undef TRACE_FIELD
78#define TRACE_FIELD(type, item, assign)\
79 entry->item = assign;
80
Steven Rostedt2939b042009-03-09 15:47:18 -040081#undef TP_CMD
82#define TP_CMD(cmd...) cmd
Steven Rostedt770cb242009-03-05 21:35:29 -050083
84#undef TRACE_ENTRY
85#define TRACE_ENTRY entry
86
87#undef TRACE_FIELD_SPECIAL
88#define TRACE_FIELD_SPECIAL(type_item, item, cmd) \
89 cmd;
90
91#undef TRACE_EVENT_FORMAT
92#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
93 \
94static struct ftrace_event_call __used \
95__attribute__((__aligned__(4))) \
96__attribute__((section("_ftrace_events"))) event_##call = { \
Steven Rostedtef180122009-03-10 14:10:56 -040097 .name = #call, \
Steven Rostedt770cb242009-03-05 21:35:29 -050098 .id = proto, \
99 .system = __stringify(TRACE_SYSTEM), \
100 .show_format = ftrace_format_##call, \
101}
102#include "trace_event_types.h"