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46322b33 MD |
1 | /* |
2 | * babeltrace-lib.c | |
3 | * | |
4 | * Babeltrace Trace Converter Library | |
5 | * | |
64fa3fec MD |
6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
46322b33 MD |
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 | ||
21 | #include <stdlib.h> | |
22 | #include <errno.h> | |
23 | #include <stdio.h> | |
847bf71a | 24 | #include <inttypes.h> |
70bd0a12 | 25 | #include <babeltrace/babeltrace-internal.h> |
46322b33 MD |
26 | #include <babeltrace/format.h> |
27 | #include <babeltrace/ctf/types.h> | |
28 | #include <babeltrace/ctf/metadata.h> | |
29 | #include <babeltrace/ctf-text/types.h> | |
0d0f5149 | 30 | #include <babeltrace/prio_heap.h> |
70bd0a12 JD |
31 | #include <babeltrace/babeltrace.h> |
32 | #include <babeltrace/types.h> | |
33 | #include <babeltrace/ctf/types.h> | |
34 | #include <babeltrace/ctf-ir/metadata.h> | |
c34ccddd | 35 | #include <stdarg.h> |
70bd0a12 | 36 | |
063f7048 MD |
37 | struct stream_saved_pos { |
38 | /* | |
39 | * Use file_stream pointer to check if the trace collection we | |
40 | * restore to match the one we saved from, for each stream. | |
41 | */ | |
42 | struct ctf_file_stream *file_stream; | |
43 | size_t cur_index; /* current index in packet index */ | |
44 | ssize_t offset; /* offset from base, in bits. EOF for end of file. */ | |
45 | }; | |
46 | ||
47 | struct babeltrace_saved_pos { | |
48 | struct trace_collection *tc; | |
49 | GArray *stream_saved_pos; /* Contains struct stream_saved_pos */ | |
50 | }; | |
51 | ||
c34ccddd MD |
52 | struct bt_callback { |
53 | int prio; /* Callback order priority. Lower first. Dynamically assigned from dependency graph. */ | |
54 | void *private_data; | |
55 | enum bt_cb_ret (*callback)(void *private_data, void *caller_data); | |
56 | }; | |
57 | ||
58 | struct bt_callback_chain { | |
59 | GArray *callback; /* Array of struct bt_callback, ordered by priority */ | |
60 | }; | |
61 | ||
62 | /* | |
63 | * per id callbacks need to be per stream class because event ID vs | |
64 | * event name mapping can vary from stream to stream. | |
65 | */ | |
66 | struct bt_stream_callbacks { | |
67 | GArray *per_id_callbacks; /* Array of struct bt_callback_chain */ | |
68 | }; | |
69 | ||
70bd0a12 JD |
70 | /* |
71 | * struct babeltrace_iter: data structure representing an iterator on a trace | |
72 | * collection. | |
73 | */ | |
74 | struct babeltrace_iter { | |
75 | struct ptr_heap *stream_heap; | |
76 | struct trace_collection *tc; | |
063f7048 | 77 | struct trace_collection_pos *end_pos; |
c34ccddd MD |
78 | GArray *callbacks; /* Array of struct bt_stream_hooks */ |
79 | struct bt_callback_chain main_callbacks; /* For all events */ | |
80 | /* | |
81 | * Flag indicating if dependency graph needs to be recalculated. | |
82 | * Set by babeltrace_iter_add_callback(), and checked (and | |
83 | * cleared) by upon entry into babeltrace_iter_read_event(). | |
84 | * babeltrace_iter_read_event() is responsible for calling dep | |
85 | * graph calculation if it sees this flag set. | |
86 | */ | |
87 | int recalculate_dep_graph; | |
88 | /* | |
89 | * Array of pointers to struct bt_dependencies, for garbage | |
90 | * collection. We're not using a linked list here because each | |
91 | * struct bt_dependencies can belong to more than one | |
92 | * babeltrace_iter. | |
93 | */ | |
94 | GPtrArray *dep_gc; | |
70bd0a12 JD |
95 | }; |
96 | ||
c34ccddd MD |
97 | struct bt_dependencies { |
98 | GArray *deps; /* Array of GQuarks */ | |
99 | int refcount; /* free when decremented to 0 */ | |
100 | }; | |
101 | ||
102 | static | |
103 | struct bt_dependencies *_babeltrace_dependencies_create(const char *first, | |
104 | va_list ap) | |
105 | { | |
106 | const char *iter; | |
107 | struct bt_dependencies *dep; | |
108 | ||
109 | dep = g_new0(struct bt_dependencies, 1); | |
110 | dep->refcount = 1; | |
111 | dep->deps = g_array_new(FALSE, TRUE, sizeof(GQuark)); | |
112 | iter = first; | |
113 | while (iter) { | |
114 | GQuark q = g_quark_from_string(iter); | |
115 | g_array_append_val(dep->deps, q); | |
116 | iter = va_arg(ap, const char *); | |
117 | } | |
118 | return dep; | |
119 | } | |
120 | ||
121 | struct bt_dependencies *babeltrace_dependencies_create(const char *first, ...) | |
122 | { | |
123 | va_list ap; | |
124 | struct bt_dependencies *deps; | |
125 | ||
126 | va_start(ap, first); | |
127 | deps = _babeltrace_dependencies_create(first, ap); | |
128 | va_end(ap); | |
129 | return deps; | |
130 | } | |
131 | ||
9e501292 | 132 | static int stream_read_event(struct ctf_file_stream *sin) |
46322b33 MD |
133 | { |
134 | int ret; | |
135 | ||
2d0bea29 | 136 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
0d0f5149 MD |
137 | if (ret == EOF) |
138 | return EOF; | |
139 | else if (ret) { | |
140 | fprintf(stdout, "[error] Reading event failed.\n"); | |
141 | return ret; | |
46322b33 | 142 | } |
46322b33 | 143 | return 0; |
0d0f5149 | 144 | } |
46322b33 | 145 | |
0d0f5149 MD |
146 | /* |
147 | * returns true if a < b, false otherwise. | |
148 | */ | |
149 | int stream_compare(void *a, void *b) | |
150 | { | |
151 | struct ctf_file_stream *s_a = a, *s_b = b; | |
152 | ||
2d0bea29 | 153 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
0d0f5149 MD |
154 | return 1; |
155 | else | |
156 | return 0; | |
46322b33 MD |
157 | } |
158 | ||
063f7048 MD |
159 | /* TODO: use begin_pos/end_pos */ |
160 | struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc, | |
161 | struct trace_collection_pos *begin_pos, | |
162 | struct trace_collection_pos *end_pos) | |
46322b33 | 163 | { |
afb48eae | 164 | int i, stream_id; |
0d0f5149 | 165 | int ret = 0; |
9e501292 | 166 | struct babeltrace_iter *iter; |
0d0f5149 | 167 | |
9e501292 JD |
168 | iter = malloc(sizeof(struct babeltrace_iter)); |
169 | if (!iter) | |
170 | goto error_malloc; | |
171 | iter->stream_heap = g_new(struct ptr_heap, 1); | |
172 | iter->tc = tc; | |
173 | ||
174 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
175 | if (ret < 0) | |
176 | goto error_heap_init; | |
46322b33 | 177 | |
9e501292 | 178 | for (i = 0; i < tc->array->len; i++) { |
afb48eae AA |
179 | struct ctf_trace *tin; |
180 | struct trace_descriptor *td_read; | |
46322b33 | 181 | |
9e501292 | 182 | td_read = g_ptr_array_index(tc->array, i); |
afb48eae AA |
183 | tin = container_of(td_read, struct ctf_trace, parent); |
184 | ||
185 | /* Populate heap with each stream */ | |
186 | for (stream_id = 0; stream_id < tin->streams->len; | |
187 | stream_id++) { | |
188 | struct ctf_stream_class *stream; | |
189 | int filenr; | |
190 | ||
191 | stream = g_ptr_array_index(tin->streams, stream_id); | |
192 | if (!stream) | |
0d0f5149 | 193 | continue; |
afb48eae AA |
194 | for (filenr = 0; filenr < stream->streams->len; |
195 | filenr++) { | |
196 | struct ctf_file_stream *file_stream; | |
197 | ||
198 | file_stream = g_ptr_array_index(stream->streams, | |
199 | filenr); | |
200 | ||
9e501292 | 201 | ret = stream_read_event(file_stream); |
afb48eae AA |
202 | if (ret == EOF) { |
203 | ret = 0; | |
204 | continue; | |
205 | } else if (ret) { | |
9e501292 | 206 | goto error; |
afb48eae AA |
207 | } |
208 | /* Add to heap */ | |
9e501292 JD |
209 | ret = heap_insert(iter->stream_heap, file_stream); |
210 | if (ret) | |
211 | goto error; | |
46322b33 MD |
212 | } |
213 | } | |
214 | } | |
215 | ||
9e501292 | 216 | return iter; |
0d0f5149 | 217 | |
9e501292 JD |
218 | error: |
219 | heap_free(iter->stream_heap); | |
220 | error_heap_init: | |
221 | g_free(iter->stream_heap); | |
222 | free(iter); | |
223 | error_malloc: | |
224 | return NULL; | |
225 | } | |
226 | ||
227 | void babeltrace_iter_destroy(struct babeltrace_iter *iter) | |
228 | { | |
229 | heap_free(iter->stream_heap); | |
230 | g_free(iter->stream_heap); | |
231 | free(iter); | |
232 | } | |
233 | ||
234 | int babeltrace_iter_next(struct babeltrace_iter *iter) | |
235 | { | |
236 | struct ctf_file_stream *file_stream, *removed; | |
237 | int ret; | |
238 | ||
239 | file_stream = heap_maximum(iter->stream_heap); | |
240 | if (!file_stream) { | |
241 | /* end of file for all streams */ | |
242 | ret = 0; | |
243 | goto end; | |
244 | } | |
245 | ||
246 | ret = stream_read_event(file_stream); | |
247 | if (ret == EOF) { | |
248 | removed = heap_remove(iter->stream_heap); | |
249 | assert(removed == file_stream); | |
250 | ret = 0; | |
251 | goto end; | |
252 | } else if (ret) { | |
253 | goto end; | |
254 | } | |
255 | /* Reinsert the file stream into the heap, and rebalance. */ | |
256 | removed = heap_replace_max(iter->stream_heap, file_stream); | |
257 | assert(removed == file_stream); | |
258 | ||
259 | end: | |
260 | return ret; | |
261 | } | |
262 | ||
263 | int babeltrace_iter_read_event(struct babeltrace_iter *iter, | |
264 | struct ctf_stream **stream, | |
265 | struct ctf_stream_event **event) | |
266 | { | |
267 | struct ctf_file_stream *file_stream; | |
268 | int ret = 0; | |
269 | ||
270 | file_stream = heap_maximum(iter->stream_heap); | |
271 | if (!file_stream) { | |
272 | /* end of file for all streams */ | |
273 | ret = EOF; | |
274 | goto end; | |
275 | } | |
276 | *stream = &file_stream->parent; | |
277 | *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id); | |
278 | end: | |
279 | return ret; | |
280 | } | |
281 | ||
282 | int convert_trace(struct trace_descriptor *td_write, | |
283 | struct trace_collection *trace_collection_read) | |
284 | { | |
285 | struct babeltrace_iter *iter; | |
286 | struct ctf_stream *stream; | |
287 | struct ctf_stream_event *event; | |
288 | struct ctf_text_stream_pos *sout; | |
289 | int ret = 0; | |
290 | ||
291 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
292 | trace_descriptor); | |
293 | ||
063f7048 | 294 | iter = babeltrace_iter_create(trace_collection_read, NULL, NULL); |
9e501292 JD |
295 | while (babeltrace_iter_read_event(iter, &stream, &event) == 0) { |
296 | ret = sout->parent.event_cb(&sout->parent, stream); | |
0d0f5149 MD |
297 | if (ret) { |
298 | fprintf(stdout, "[error] Writing event failed.\n"); | |
299 | goto end; | |
300 | } | |
9e501292 JD |
301 | ret = babeltrace_iter_next(iter); |
302 | if (ret < 0) | |
0d0f5149 | 303 | goto end; |
0d0f5149 | 304 | } |
0d0f5149 | 305 | end: |
9e501292 | 306 | babeltrace_iter_destroy(iter); |
46322b33 MD |
307 | return ret; |
308 | } |