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[babeltrace.git] / formats / ctf-text / ctf-text.c
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1/*
2 * BabelTrace - Common Trace Format (CTF)
3 *
4 * CTF Text Format registration.
5 *
6 * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 */
18
19#include <babeltrace/format.h>
20#include <babeltrace/ctf-text/types.h>
31262354 21#include <babeltrace/ctf/metadata.h>
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22#include <babeltrace/babeltrace.h>
23#include <inttypes.h>
24#include <uuid/uuid.h>
25#include <sys/mman.h>
26#include <errno.h>
27#include <sys/types.h>
28#include <sys/stat.h>
29#include <fcntl.h>
30#include <dirent.h>
31#include <glib.h>
32#include <unistd.h>
33#include <stdlib.h>
34
35struct trace_descriptor *ctf_text_open_trace(const char *path, int flags);
36void ctf_text_close_trace(struct trace_descriptor *descriptor);
37
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38static
39rw_dispatch write_dispatch_table[] = {
40 [ CTF_TYPE_INTEGER ] = ctf_text_integer_write,
41 [ CTF_TYPE_FLOAT ] = ctf_text_float_write,
42 [ CTF_TYPE_ENUM ] = ctf_text_enum_write,
43 [ CTF_TYPE_STRING ] = ctf_text_string_write,
44 [ CTF_TYPE_STRUCT ] = ctf_text_struct_write,
45 [ CTF_TYPE_VARIANT ] = ctf_text_variant_write,
46 [ CTF_TYPE_ARRAY ] = ctf_text_array_write,
47 [ CTF_TYPE_SEQUENCE ] = ctf_text_sequence_write,
48};
49
50static
51struct format ctf_text_format = {
52 .open_trace = ctf_text_open_trace,
53 .close_trace = ctf_text_close_trace,
54};
55
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56static
57int ctf_text_write_event(struct stream_pos *ppos,
764af3f4 58 struct ctf_stream *stream)
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59{
60 struct ctf_text_stream_pos *pos =
61 container_of(ppos, struct ctf_text_stream_pos, parent);
764af3f4 62 struct ctf_stream_class *stream_class = stream->stream_class;
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63 struct ctf_event *event_class;
64 uint64_t id = 0;
65 int len_index;
66 int ret;
aa6bffae 67 int field_nr = 0;
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68
69 /* print event header */
70 if (stream_class->event_header) {
71 /* lookup event id */
72 len_index = struct_declaration_lookup_field_index(stream_class->event_header_decl,
73 g_quark_from_static_string("id"));
74 if (len_index >= 0) {
75 struct definition_integer *defint;
76 struct definition *field;
77
78 field = struct_definition_get_field_from_index(stream_class->event_header, len_index);
79 assert(field->declaration->id == CTF_TYPE_INTEGER);
80 defint = container_of(field, struct definition_integer, p);
81 assert(defint->declaration->signedness == FALSE);
82 id = defint->value._unsigned; /* set id */
83 }
84 }
85
86 if (id >= stream_class->events_by_id->len) {
87 fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
88 return -EINVAL;
89 }
90 event_class = g_ptr_array_index(stream_class->events_by_id, id);
91 if (!event_class) {
92 fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
93 return -EINVAL;
94 }
95
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96 if (pos->print_names)
97 fprintf(pos->fp, "timestamp = ");
98 else
99 fprintf(pos->fp, "[");
764af3f4 100 fprintf(pos->fp, "%12" PRIu64, stream->timestamp);
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101 if (!pos->print_names)
102 fprintf(pos->fp, "]");
103
8178fe48 104 if (pos->print_names)
aa6bffae 105 fprintf(pos->fp, ", ");
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106 else
107 fprintf(pos->fp, " ");
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108 if (pos->print_names)
109 fprintf(pos->fp, "name = ");
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110 fprintf(pos->fp, "%s", g_quark_to_string(event_class->name));
111 if (pos->print_names)
112 field_nr++;
113 else
114 fprintf(pos->fp, ": ");
31262354 115
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116 /* Only show the event header in verbose mode */
117 if (babeltrace_verbose && stream_class->event_header) {
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118 if (field_nr++ != 0)
119 fprintf(pos->fp, ", ");
31262354 120 if (pos->print_names)
aa6bffae 121 fprintf(pos->fp, "stream.event.header = ");
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122 ret = generic_rw(ppos, &stream_class->event_header->p);
123 if (ret)
124 goto error;
125 }
126
127 /* print stream-declared event context */
128 if (stream_class->event_context) {
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129 if (field_nr++ != 0)
130 fprintf(pos->fp, ", ");
31262354 131 if (pos->print_names)
aa6bffae 132 fprintf(pos->fp, "stream.event.context = ");
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133 ret = generic_rw(ppos, &stream_class->event_context->p);
134 if (ret)
135 goto error;
136 }
137
138 /* print event-declared event context */
139 if (event_class->context) {
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140 if (field_nr++ != 0)
141 fprintf(pos->fp, ", ");
31262354 142 if (pos->print_names)
aa6bffae 143 fprintf(pos->fp, "event.context = ");
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144 ret = generic_rw(ppos, &event_class->context->p);
145 if (ret)
146 goto error;
147 }
148
149 /* Read and print event payload */
150 if (event_class->fields) {
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151 if (field_nr++ != 0)
152 fprintf(pos->fp, ", ");
31262354 153 if (pos->print_names)
aa6bffae 154 fprintf(pos->fp, "event.fields = ");
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155 ret = generic_rw(ppos, &event_class->fields->p);
156 if (ret)
157 goto error;
158 }
159 fprintf(pos->fp, "\n");
160
161 return 0;
162
163error:
164 fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
165 return ret;
166}
167
168
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169struct trace_descriptor *ctf_text_open_trace(const char *path, int flags)
170{
171 struct ctf_text_stream_pos *pos;
172 FILE *fp;
173
174 pos = g_new0(struct ctf_text_stream_pos, 1);
175
176 switch (flags & O_ACCMODE) {
989c73bc 177 case O_RDWR:
b61922b5 178 if (!path)
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179 fp = stdout;
180 else
181 fp = fopen(path, "w");
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182 if (!fp)
183 goto error;
184 pos->fp = fp;
185 pos->parent.rw_table = write_dispatch_table;
31262354 186 pos->parent.event_cb = ctf_text_write_event;
d63ca2cd 187 pos->print_names = opt_field_names;
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188 break;
189 case O_RDONLY:
190 default:
191 fprintf(stdout, "[error] Incorrect open flags.\n");
192 goto error;
193 }
194
195 return &pos->trace_descriptor;
196error:
197 g_free(pos);
198 return NULL;
199}
200
201void ctf_text_close_trace(struct trace_descriptor *td)
202{
203 struct ctf_text_stream_pos *pos =
204 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
205 fclose(pos->fp);
206 g_free(pos);
207}
208
209void __attribute__((constructor)) ctf_text_init(void)
210{
211 int ret;
212
213 ctf_text_format.name = g_quark_from_static_string("text");
214 ret = bt_register_format(&ctf_text_format);
215 assert(!ret);
216}
217
218/* TODO: finalize */
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