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5d93a76e MD |
1 | /* |
2 | * BabelTrace - Common Trace Format (CTF) | |
3 | * | |
4 | * CTF Metadata Dump. | |
5 | * | |
6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation | |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
9 | * | |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
16 | * | |
17 | * The above copyright notice and this permission notice shall be included in | |
18 | * all copies or substantial portions of the Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
26 | * SOFTWARE. | |
27 | */ | |
28 | ||
29 | #include <babeltrace/format.h> | |
30 | #include <babeltrace/ctf-text/types.h> | |
31 | #include <babeltrace/babeltrace-internal.h> | |
32 | #include <babeltrace/ctf/events-internal.h> | |
33 | #include <inttypes.h> | |
34 | #include <sys/mman.h> | |
35 | #include <errno.h> | |
36 | #include <sys/types.h> | |
37 | #include <sys/stat.h> | |
38 | #include <fcntl.h> | |
39 | #include <dirent.h> | |
40 | #include <glib.h> | |
41 | #include <unistd.h> | |
42 | #include <stdlib.h> | |
43 | ||
44 | static | |
45 | struct bt_trace_descriptor *ctf_metadata_open_trace(const char *path, int flags, | |
46 | void (*packet_seek)(struct bt_stream_pos *pos, size_t index, | |
47 | int whence), FILE *metadata_fp); | |
48 | static | |
49 | int ctf_metadata_close_trace(struct bt_trace_descriptor *descriptor); | |
50 | ||
51 | static | |
52 | struct bt_format ctf_metadata_format = { | |
53 | .open_trace = ctf_metadata_open_trace, | |
54 | .close_trace = ctf_metadata_close_trace, | |
55 | }; | |
56 | ||
7e3e3582 JG |
57 | void bt_ctf_metadata_hook(void) |
58 | { | |
59 | /* | |
60 | * Dummy function to prevent the linker from discarding this format as | |
61 | * "unused" in static builds. | |
62 | */ | |
63 | } | |
64 | ||
5d93a76e MD |
65 | static |
66 | int ctf_metadata_trace_pre_handler(struct bt_stream_pos *ppos, | |
67 | struct bt_trace_descriptor *td) | |
68 | { | |
69 | struct ctf_text_stream_pos *pos = | |
70 | container_of(ppos, struct ctf_text_stream_pos, parent); | |
71 | struct ctf_trace *trace; | |
72 | ||
73 | trace = container_of(td, struct ctf_trace, parent); | |
74 | if (!trace->metadata_string) | |
75 | return -EINVAL; | |
76 | if (trace->metadata_packetized) { | |
77 | fprintf(pos->fp, "/* CTF %u.%u */\n", | |
78 | BT_CTF_MAJOR, BT_CTF_MINOR); | |
79 | } | |
80 | fprintf(pos->fp, "%s", trace->metadata_string); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static | |
85 | struct bt_trace_descriptor *ctf_metadata_open_trace(const char *path, int flags, | |
86 | void (*packet_seek)(struct bt_stream_pos *pos, size_t index, | |
87 | int whence), FILE *metadata_fp) | |
88 | { | |
89 | struct ctf_text_stream_pos *pos; | |
90 | FILE *fp; | |
91 | ||
92 | pos = g_new0(struct ctf_text_stream_pos, 1); | |
93 | ||
94 | pos->last_real_timestamp = -1ULL; | |
95 | pos->last_cycles_timestamp = -1ULL; | |
96 | switch (flags & O_ACCMODE) { | |
97 | case O_RDWR: | |
98 | if (!path) | |
99 | fp = stdout; | |
100 | else | |
101 | fp = fopen(path, "w"); | |
102 | if (!fp) | |
103 | goto error; | |
104 | pos->fp = fp; | |
105 | pos->parent.pre_trace_cb = ctf_metadata_trace_pre_handler; | |
ca334c72 | 106 | pos->parent.trace = &pos->trace_descriptor; |
5d93a76e MD |
107 | pos->print_names = 0; |
108 | break; | |
109 | case O_RDONLY: | |
110 | default: | |
111 | fprintf(stderr, "[error] Incorrect open flags.\n"); | |
112 | goto error; | |
113 | } | |
114 | ||
115 | return &pos->trace_descriptor; | |
116 | error: | |
117 | g_free(pos); | |
118 | return NULL; | |
119 | } | |
120 | ||
121 | static | |
122 | int ctf_metadata_close_trace(struct bt_trace_descriptor *td) | |
123 | { | |
124 | int ret; | |
125 | struct ctf_text_stream_pos *pos = | |
126 | container_of(td, struct ctf_text_stream_pos, trace_descriptor); | |
127 | if (pos->fp != stdout) { | |
128 | ret = fclose(pos->fp); | |
129 | if (ret) { | |
130 | perror("Error on fclose"); | |
131 | return -1; | |
132 | } | |
133 | } | |
134 | g_free(pos); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static | |
139 | void __attribute__((constructor)) ctf_metadata_init(void) | |
140 | { | |
141 | int ret; | |
142 | ||
2ea5cc8b | 143 | ctf_metadata_format.name = g_quark_from_string("ctf-metadata"); |
5d93a76e MD |
144 | ret = bt_register_format(&ctf_metadata_format); |
145 | assert(!ret); | |
146 | } | |
147 | ||
148 | static | |
149 | void __attribute__((destructor)) ctf_metadata_exit(void) | |
150 | { | |
151 | bt_unregister_format(&ctf_metadata_format); | |
152 | } |