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770cb243 SR |
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 | |
156b5f17 SR |
21 | #define TRACE_FIELD_ZERO_CHAR(item) \ |
22 | ret = trace_seq_printf(s, "\tfield: char " #item ";\t" \ | |
23 | "offset:%u;\tsize:0;\n", \ | |
24 | (unsigned int)offsetof(typeof(field), item)); \ | |
25 | if (!ret) \ | |
770cb243 SR |
26 | return 0; |
27 | ||
28 | ||
2939b046 SR |
29 | #undef TP_RAW_FMT |
30 | #define TP_RAW_FMT(args...) args | |
770cb243 SR |
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 | ||
2939b046 SR |
60 | #undef TP_CMD |
61 | #define TP_CMD(cmd...) cmd | |
770cb243 SR |
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" |