plugins/utils/trimmer/copy.c

   1 /*
   2  * copy.c
   3  *
   4  * Babeltrace Copy Trace Structure
   5  *
   6  * Copyright 2017 Julien Desfossez <jdesfossez@efficios.com>
   7  *
   8  * Author: Julien Desfossez <jdesfossez@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/ctf-ir/event.h>
  30 #include <babeltrace/ctf-ir/packet.h>
  31 #include <babeltrace/ctf-ir/event-class.h>
  32 #include <babeltrace/ctf-ir/stream.h>
  33 #include <babeltrace/ctf-ir/stream-class.h>
  34 #include <babeltrace/ctf-ir/clock-class.h>
  35 #include <babeltrace/ctf-ir/fields.h>
  36 #include <babeltrace/ctf-writer/stream-class.h>
  37 #include <babeltrace/ctf-writer/stream.h>
  38
  39 #include <ctfcopytrace.h>
  40 #include "iterator.h"
  41
  42 static
  43 struct bt_ctf_packet *lookup_packet(struct trimmer_iterator *trim_it,
  44                 struct bt_ctf_packet *packet)
  45 {
  46         return (struct bt_ctf_packet *) g_hash_table_lookup(
  47                         trim_it->packet_map,
  48                         (gpointer) packet);
  49 }
  50
  51 static
  52 struct bt_ctf_packet *insert_new_packet(struct trimmer_iterator *trim_it,
  53                 struct bt_ctf_packet *packet,
  54                 struct bt_ctf_stream *stream)
  55 {
  56         struct bt_ctf_packet *writer_packet = NULL;
  57
  58         writer_packet = bt_ctf_packet_create(stream);
  59         if (!writer_packet) {
  60                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
  61                                 __FILE__, __LINE__);
  62                 goto end;
  63         }
  64         g_hash_table_insert(trim_it->packet_map, (gpointer) packet, writer_packet);
  65
  66 end:
  67         return writer_packet;
  68 }
  69
  70 BT_HIDDEN
  71 enum bt_component_status update_packet_context_field(FILE *err,
  72                 struct bt_ctf_packet *writer_packet,
  73                 const char *name, int64_t value)
  74 {
  75         enum bt_component_status ret;
  76         struct bt_ctf_field *packet_context = NULL, *writer_packet_context = NULL;
  77         struct bt_ctf_field_type *struct_type = NULL, *field_type = NULL;
  78         struct bt_ctf_field *field = NULL, *writer_field = NULL;
  79         int nr_fields, i, int_ret;
  80
  81         packet_context = bt_ctf_packet_get_context(writer_packet);
  82         if (!packet_context) {
  83                 fprintf(err, "[error] %s in %s:%d\n", __func__, __FILE__,
  84                                 __LINE__);
  85                 goto error;
  86         }
  87
  88         struct_type = bt_ctf_field_get_type(packet_context);
  89         if (!struct_type) {
  90                 fprintf(err, "[error] %s in %s:%d\n", __func__, __FILE__,
  91                                 __LINE__);
  92                 goto error;
  93         }
  94
  95         writer_packet_context = bt_ctf_packet_get_context(writer_packet);
  96         if (!writer_packet_context) {
  97                 fprintf(err, "[error] %s in %s:%d\n", __func__, __FILE__,
  98                                 __LINE__);
  99                 goto error;
 100         }
 101
 102         nr_fields = bt_ctf_field_type_structure_get_field_count(struct_type);
 103         for (i = 0; i < nr_fields; i++) {
 104                 const char *field_name;
 105
 106                 field = bt_ctf_field_structure_get_field_by_index(
 107                                 packet_context, i);
 108                 if (!field) {
 109                         fprintf(err, "[error] %s in %s:%d\n", __func__,
 110                                         __FILE__, __LINE__);
 111                         goto error;
 112                 }
 113                 if (bt_ctf_field_type_structure_get_field(struct_type,
 114                                         &field_name, &field_type, i) < 0) {
 115                         fprintf(err, "[error] %s in %s:%d\n", __func__,
 116                                         __FILE__, __LINE__);
 117                         goto error;
 118                 }
 119                 if (strcmp(field_name, name)) {
 120                         BT_PUT(field_type);
 121                         BT_PUT(field);
 122                         continue;
 123                 }
 124                 if (bt_ctf_field_type_get_type_id(field_type) != BT_CTF_FIELD_TYPE_ID_INTEGER) {
 125                         fprintf(err, "[error] Unexpected packet context field type\n");
 126                         goto error;
 127                 }
 128                 writer_field = bt_ctf_field_structure_get_field(writer_packet_context,
 129                                 field_name);
 130                 if (!writer_field) {
 131                         fprintf(err, "[error] %s in %s:%d\n", __func__, __FILE__,
 132                                         __LINE__);
 133                         goto error;
 134                 }
 135
 136                 int_ret = bt_ctf_field_unsigned_integer_set_value(writer_field, value);
 137                 if (int_ret < 0) {
 138                         fprintf(err, "[error] %s in %s:%d\n", __func__, __FILE__,
 139                                         __LINE__);
 140                         goto error;
 141                 }
 142                 BT_PUT(writer_field);
 143                 BT_PUT(field_type);
 144                 BT_PUT(field);
 145         }
 146
 147         ret = BT_COMPONENT_STATUS_OK;
 148         goto end;
 149
 150 error:
 151         bt_put(writer_field);
 152         bt_put(field_type);
 153         bt_put(field);
 154         ret = BT_COMPONENT_STATUS_ERROR;
 155 end:
 156         bt_put(struct_type);
 157         bt_put(packet_context);
 158         return ret;
 159 }
 160
 161 BT_HIDDEN
 162 struct bt_ctf_packet *trimmer_new_packet(
 163                 struct trimmer_iterator *trim_it,
 164                 struct bt_ctf_packet *packet)
 165 {
 166         struct bt_ctf_stream *stream = NULL;
 167         struct bt_ctf_field *writer_packet_context = NULL;
 168         struct bt_ctf_packet *writer_packet = NULL;
 169         int int_ret;
 170
 171         stream = bt_ctf_packet_get_stream(packet);
 172         if (!stream) {
 173                 fprintf(trim_it->err, "[error] %s in %s:%d\n",
 174                                 __func__, __FILE__, __LINE__);
 175                 goto error;
 176         }
 177
 178         /*
 179          * If a packet was already opened, close it and remove it from
 180          * the HT.
 181          */
 182         writer_packet = lookup_packet(trim_it, packet);
 183         if (writer_packet) {
 184                 g_hash_table_remove(trim_it->packet_map, packet);
 185                 BT_PUT(writer_packet);
 186         }
 187
 188         writer_packet = insert_new_packet(trim_it, packet, stream);
 189         if (!writer_packet) {
 190                 fprintf(trim_it->err, "[error] %s in %s:%d\n",
 191                                 __func__, __FILE__, __LINE__);
 192                 goto error;
 193         }
 194         bt_get(writer_packet);
 195
 196         writer_packet_context = ctf_copy_packet_context(trim_it->err, packet,
 197                         stream);
 198         if (!writer_packet_context) {
 199                 fprintf(trim_it->err, "[error] %s in %s:%d\n",
 200                                 __func__, __FILE__, __LINE__);
 201                 goto error;
 202         }
 203
 204         int_ret = bt_ctf_packet_set_context(writer_packet, writer_packet_context);
 205         if (int_ret) {
 206                 fprintf(trim_it->err, "[error] %s in %s:%d\n",
 207                                 __func__, __FILE__, __LINE__);
 208                 goto error;
 209         }
 210
 211         goto end;
 212
 213 error:
 214         BT_PUT(writer_packet);
 215 end:
 216         bt_put(writer_packet_context);
 217         bt_put(stream);
 218         return writer_packet;
 219 }
 220
 221 BT_HIDDEN
 222 struct bt_ctf_packet *trimmer_close_packet(
 223                 struct trimmer_iterator *trim_it,
 224                 struct bt_ctf_packet *packet)
 225 {
 226         struct bt_ctf_packet *writer_packet = NULL;
 227
 228         writer_packet = lookup_packet(trim_it, packet);
 229         if (!writer_packet) {
 230                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 231                                 __FILE__, __LINE__);
 232                 goto end;
 233         }
 234
 235         g_hash_table_remove(trim_it->packet_map, packet);
 236
 237 end:
 238         return writer_packet;
 239 }
 240
 241 BT_HIDDEN
 242 struct bt_ctf_event *trimmer_output_event(
 243                 struct trimmer_iterator *trim_it,
 244                 struct bt_ctf_event *event)
 245 {
 246         struct bt_ctf_event_class *event_class = NULL;
 247         struct bt_ctf_event *writer_event = NULL;
 248         struct bt_ctf_packet *packet = NULL, *writer_packet = NULL;
 249         const char *event_name;
 250         int int_ret;
 251
 252         event_class = bt_ctf_event_get_class(event);
 253         if (!event_class) {
 254                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 255                                 __FILE__, __LINE__);
 256                 goto error;
 257         }
 258
 259         event_name = bt_ctf_event_class_get_name(event_class);
 260         if (!event_name) {
 261                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 262                                 __FILE__, __LINE__);
 263                 goto error;
 264         }
 265
 266         writer_event = ctf_copy_event(trim_it->err, event, event_class, false);
 267         if (!writer_event) {
 268                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 269                                 __FILE__, __LINE__);
 270                 fprintf(trim_it->err, "[error] Failed to copy event %s\n",
 271                                 bt_ctf_event_class_get_name(event_class));
 272                 goto error;
 273         }
 274
 275         packet = bt_ctf_event_get_packet(event);
 276         if (!packet) {
 277                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 278                                 __FILE__, __LINE__);
 279                 goto error;
 280         }
 281
 282         writer_packet = lookup_packet(trim_it, packet);
 283         if (!writer_packet) {
 284                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 285                                 __FILE__, __LINE__);
 286                 goto error;
 287         }
 288         bt_get(writer_packet);
 289
 290         int_ret = bt_ctf_event_set_packet(writer_event, writer_packet);
 291         if (int_ret < 0) {
 292                 fprintf(trim_it->err, "[error] %s in %s:%d\n", __func__,
 293                                 __FILE__, __LINE__);
 294                 fprintf(trim_it->err, "[error] Failed to append event %s\n",
 295                                 bt_ctf_event_class_get_name(event_class));
 296                 goto error;
 297         }
 298
 299         /* We keep the reference on the writer_event to create a notification. */
 300         goto end;
 301
 302 error:
 303         BT_PUT(writer_event);
 304 end:
 305         bt_put(writer_packet);
 306         bt_put(packet);
 307         bt_put(event_class);
 308         return writer_event;
 309 }