Commit | Line | Data |
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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> | |
35 | ||
063f7048 MD |
36 | struct stream_saved_pos { |
37 | /* | |
38 | * Use file_stream pointer to check if the trace collection we | |
39 | * restore to match the one we saved from, for each stream. | |
40 | */ | |
41 | struct ctf_file_stream *file_stream; | |
42 | size_t cur_index; /* current index in packet index */ | |
43 | ssize_t offset; /* offset from base, in bits. EOF for end of file. */ | |
44 | }; | |
45 | ||
46 | struct babeltrace_saved_pos { | |
47 | struct trace_collection *tc; | |
48 | GArray *stream_saved_pos; /* Contains struct stream_saved_pos */ | |
49 | }; | |
50 | ||
70bd0a12 JD |
51 | /* |
52 | * struct babeltrace_iter: data structure representing an iterator on a trace | |
53 | * collection. | |
54 | */ | |
55 | struct babeltrace_iter { | |
56 | struct ptr_heap *stream_heap; | |
57 | struct trace_collection *tc; | |
063f7048 | 58 | struct trace_collection_pos *end_pos; |
70bd0a12 JD |
59 | }; |
60 | ||
9e501292 | 61 | static int stream_read_event(struct ctf_file_stream *sin) |
46322b33 MD |
62 | { |
63 | int ret; | |
64 | ||
2d0bea29 | 65 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
0d0f5149 MD |
66 | if (ret == EOF) |
67 | return EOF; | |
68 | else if (ret) { | |
69 | fprintf(stdout, "[error] Reading event failed.\n"); | |
70 | return ret; | |
46322b33 | 71 | } |
46322b33 | 72 | return 0; |
0d0f5149 | 73 | } |
46322b33 | 74 | |
0d0f5149 MD |
75 | /* |
76 | * returns true if a < b, false otherwise. | |
77 | */ | |
78 | int stream_compare(void *a, void *b) | |
79 | { | |
80 | struct ctf_file_stream *s_a = a, *s_b = b; | |
81 | ||
2d0bea29 | 82 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
0d0f5149 MD |
83 | return 1; |
84 | else | |
85 | return 0; | |
46322b33 MD |
86 | } |
87 | ||
063f7048 MD |
88 | /* TODO: use begin_pos/end_pos */ |
89 | struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc, | |
90 | struct trace_collection_pos *begin_pos, | |
91 | struct trace_collection_pos *end_pos) | |
46322b33 | 92 | { |
afb48eae | 93 | int i, stream_id; |
0d0f5149 | 94 | int ret = 0; |
9e501292 | 95 | struct babeltrace_iter *iter; |
0d0f5149 | 96 | |
9e501292 JD |
97 | iter = malloc(sizeof(struct babeltrace_iter)); |
98 | if (!iter) | |
99 | goto error_malloc; | |
100 | iter->stream_heap = g_new(struct ptr_heap, 1); | |
101 | iter->tc = tc; | |
102 | ||
103 | ret = heap_init(iter->stream_heap, 0, stream_compare); | |
104 | if (ret < 0) | |
105 | goto error_heap_init; | |
46322b33 | 106 | |
9e501292 | 107 | for (i = 0; i < tc->array->len; i++) { |
afb48eae AA |
108 | struct ctf_trace *tin; |
109 | struct trace_descriptor *td_read; | |
46322b33 | 110 | |
9e501292 | 111 | td_read = g_ptr_array_index(tc->array, i); |
afb48eae AA |
112 | tin = container_of(td_read, struct ctf_trace, parent); |
113 | ||
114 | /* Populate heap with each stream */ | |
115 | for (stream_id = 0; stream_id < tin->streams->len; | |
116 | stream_id++) { | |
117 | struct ctf_stream_class *stream; | |
118 | int filenr; | |
119 | ||
120 | stream = g_ptr_array_index(tin->streams, stream_id); | |
121 | if (!stream) | |
0d0f5149 | 122 | continue; |
afb48eae AA |
123 | for (filenr = 0; filenr < stream->streams->len; |
124 | filenr++) { | |
125 | struct ctf_file_stream *file_stream; | |
126 | ||
127 | file_stream = g_ptr_array_index(stream->streams, | |
128 | filenr); | |
129 | ||
9e501292 | 130 | ret = stream_read_event(file_stream); |
afb48eae AA |
131 | if (ret == EOF) { |
132 | ret = 0; | |
133 | continue; | |
134 | } else if (ret) { | |
9e501292 | 135 | goto error; |
afb48eae AA |
136 | } |
137 | /* Add to heap */ | |
9e501292 JD |
138 | ret = heap_insert(iter->stream_heap, file_stream); |
139 | if (ret) | |
140 | goto error; | |
46322b33 MD |
141 | } |
142 | } | |
143 | } | |
144 | ||
9e501292 | 145 | return iter; |
0d0f5149 | 146 | |
9e501292 JD |
147 | error: |
148 | heap_free(iter->stream_heap); | |
149 | error_heap_init: | |
150 | g_free(iter->stream_heap); | |
151 | free(iter); | |
152 | error_malloc: | |
153 | return NULL; | |
154 | } | |
155 | ||
156 | void babeltrace_iter_destroy(struct babeltrace_iter *iter) | |
157 | { | |
158 | heap_free(iter->stream_heap); | |
159 | g_free(iter->stream_heap); | |
160 | free(iter); | |
161 | } | |
162 | ||
163 | int babeltrace_iter_next(struct babeltrace_iter *iter) | |
164 | { | |
165 | struct ctf_file_stream *file_stream, *removed; | |
166 | int ret; | |
167 | ||
168 | file_stream = heap_maximum(iter->stream_heap); | |
169 | if (!file_stream) { | |
170 | /* end of file for all streams */ | |
171 | ret = 0; | |
172 | goto end; | |
173 | } | |
174 | ||
175 | ret = stream_read_event(file_stream); | |
176 | if (ret == EOF) { | |
177 | removed = heap_remove(iter->stream_heap); | |
178 | assert(removed == file_stream); | |
179 | ret = 0; | |
180 | goto end; | |
181 | } else if (ret) { | |
182 | goto end; | |
183 | } | |
184 | /* Reinsert the file stream into the heap, and rebalance. */ | |
185 | removed = heap_replace_max(iter->stream_heap, file_stream); | |
186 | assert(removed == file_stream); | |
187 | ||
188 | end: | |
189 | return ret; | |
190 | } | |
191 | ||
192 | int babeltrace_iter_read_event(struct babeltrace_iter *iter, | |
193 | struct ctf_stream **stream, | |
194 | struct ctf_stream_event **event) | |
195 | { | |
196 | struct ctf_file_stream *file_stream; | |
197 | int ret = 0; | |
198 | ||
199 | file_stream = heap_maximum(iter->stream_heap); | |
200 | if (!file_stream) { | |
201 | /* end of file for all streams */ | |
202 | ret = EOF; | |
203 | goto end; | |
204 | } | |
205 | *stream = &file_stream->parent; | |
206 | *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id); | |
207 | end: | |
208 | return ret; | |
209 | } | |
210 | ||
211 | int convert_trace(struct trace_descriptor *td_write, | |
212 | struct trace_collection *trace_collection_read) | |
213 | { | |
214 | struct babeltrace_iter *iter; | |
215 | struct ctf_stream *stream; | |
216 | struct ctf_stream_event *event; | |
217 | struct ctf_text_stream_pos *sout; | |
218 | int ret = 0; | |
219 | ||
220 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
221 | trace_descriptor); | |
222 | ||
063f7048 | 223 | iter = babeltrace_iter_create(trace_collection_read, NULL, NULL); |
9e501292 JD |
224 | while (babeltrace_iter_read_event(iter, &stream, &event) == 0) { |
225 | ret = sout->parent.event_cb(&sout->parent, stream); | |
0d0f5149 MD |
226 | if (ret) { |
227 | fprintf(stdout, "[error] Writing event failed.\n"); | |
228 | goto end; | |
229 | } | |
9e501292 JD |
230 | ret = babeltrace_iter_next(iter); |
231 | if (ret < 0) | |
0d0f5149 | 232 | goto end; |
0d0f5149 | 233 | } |
0d0f5149 | 234 | end: |
9e501292 | 235 | babeltrace_iter_destroy(iter); |
46322b33 MD |
236 | return ret; |
237 | } |