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lib: make it mandatory to have seek_X if can_seek_X is defined
[babeltrace.git] / src / lib / plugin / plugin-so.c
1 /*
2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
3 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
5 * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25
26 #define BT_LOG_TAG "LIB/PLUGIN-SO"
27 #include "lib/logging.h"
28
29 #include "common/assert.h"
30 #include "lib/assert-pre.h"
31 #include "compat/compiler.h"
32 #include <babeltrace2/plugin/plugin-dev.h>
33 #include "lib/graph/component-class.h"
34 #include <babeltrace2/graph/component-class.h>
35 #include <babeltrace2/graph/component-class-source.h>
36 #include <babeltrace2/graph/component-class-filter.h>
37 #include <babeltrace2/graph/component-class-sink.h>
38 #include <babeltrace2/types.h>
39 #include "common/list.h"
40 #include <string.h>
41 #include <stdlib.h>
42 #include <glib.h>
43 #include <gmodule.h>
44
45 #include "plugin.h"
46 #include "plugin-so.h"
47 #include "lib/func-status.h"
48 #include "common/common.h"
49
50 #define NATIVE_PLUGIN_SUFFIX "." G_MODULE_SUFFIX
51 #define NATIVE_PLUGIN_SUFFIX_LEN sizeof(NATIVE_PLUGIN_SUFFIX)
52 #define LIBTOOL_PLUGIN_SUFFIX ".la"
53 #define LIBTOOL_PLUGIN_SUFFIX_LEN sizeof(LIBTOOL_PLUGIN_SUFFIX)
54
55 #define PLUGIN_SUFFIX_LEN bt_max_t(size_t, sizeof(NATIVE_PLUGIN_SUFFIX), \
56 sizeof(LIBTOOL_PLUGIN_SUFFIX))
57
58 BT_PLUGIN_MODULE();
59
60 /*
61 * This list, global to the library, keeps all component classes that
62 * have a reference to their shared library handles. It allows iteration
63 * on all component classes still present when the destructor executes
64 * to release the shared library handle references they might still have.
65 *
66 * The list items are the component classes created with
67 * bt_plugin_add_component_class(). They keep the shared library handle
68 * object created by their plugin alive so that the plugin's code is
69 * not discarded when it could still be in use by living components
70 * created from those component classes:
71 *
72 * [component] --ref-> [component class]-> [shlib handle]
73 *
74 * It allows this use-case:
75 *
76 * my_plugins = bt_plugin_find_all_from_file("/path/to/my-plugin.so");
77 * // instantiate components from a plugin's component classes
78 * // put plugins and free my_plugins here
79 * // user code of instantiated components still exists
80 *
81 * An entry is removed from this list when a component class is
82 * destroyed thanks to a custom destroy listener. When the entry is
83 * removed, the entry is removed from the list, and we release the
84 * reference on the shlib handle. Assuming the original plugin object
85 * which contained some component classes is put first, when the last
86 * component class is removed from this list, the shared library handle
87 * object's reference count falls to zero and the shared library is
88 * finally closed.
89 */
90
91 static
92 BT_LIST_HEAD(component_class_list);
93
94 __attribute__((destructor)) static
95 void fini_comp_class_list(void)
96 {
97 struct bt_component_class *comp_class, *tmp;
98
99 bt_list_for_each_entry_safe(comp_class, tmp, &component_class_list, node) {
100 bt_list_del(&comp_class->node);
101 BT_OBJECT_PUT_REF_AND_RESET(comp_class->so_handle);
102 }
103
104 BT_LOGD_STR("Released references from all component classes to shared library handles.");
105 }
106
107 static
108 void bt_plugin_so_shared_lib_handle_destroy(struct bt_object *obj)
109 {
110 struct bt_plugin_so_shared_lib_handle *shared_lib_handle;
111
112 BT_ASSERT(obj);
113 shared_lib_handle = container_of(obj,
114 struct bt_plugin_so_shared_lib_handle, base);
115 const char *path = shared_lib_handle->path ?
116 shared_lib_handle->path->str : NULL;
117
118 BT_LOGI("Destroying shared library handle: addr=%p, path=\"%s\"",
119 shared_lib_handle, path);
120
121 if (shared_lib_handle->init_called && shared_lib_handle->exit) {
122 BT_LOGD_STR("Calling user's plugin exit function.");
123 shared_lib_handle->exit();
124 BT_LOGD_STR("User function returned.");
125 }
126
127 if (shared_lib_handle->module) {
128 #ifdef BT_DEBUG_MODE
129 /*
130 * Valgrind shows incomplete stack traces when
131 * dynamically loaded libraries are closed before it
132 * finishes. Use the LIBBABELTRACE2_NO_DLCLOSE in a debug
133 * build to avoid this.
134 */
135 const char *var = getenv("LIBBABELTRACE2_NO_DLCLOSE");
136
137 if (!var || strcmp(var, "1") != 0) {
138 #endif
139 BT_LOGI("Closing GModule: path=\"%s\"", path);
140
141 if (!g_module_close(shared_lib_handle->module)) {
142 /*
143 * Just log here: we're in a destructor,
144 * so we cannot append an error cause
145 * (there's no returned status).
146 */
147 BT_LOGE("Cannot close GModule: %s: path=\"%s\"",
148 g_module_error(), path);
149 }
150
151 shared_lib_handle->module = NULL;
152 #ifdef BT_DEBUG_MODE
153 } else {
154 BT_LOGI("Not closing GModule because `LIBBABELTRACE2_NO_DLCLOSE=1`: "
155 "path=\"%s\"", path);
156 }
157 #endif
158 }
159
160 if (shared_lib_handle->path) {
161 g_string_free(shared_lib_handle->path, TRUE);
162 shared_lib_handle->path = NULL;
163 }
164
165 g_free(shared_lib_handle);
166 }
167
168 static
169 int bt_plugin_so_shared_lib_handle_create(
170 const char *path,
171 struct bt_plugin_so_shared_lib_handle **shared_lib_handle)
172 {
173 int status = BT_FUNC_STATUS_OK;
174
175 BT_ASSERT(shared_lib_handle);
176 BT_LOGI("Creating shared library handle: path=\"%s\"", path);
177 *shared_lib_handle = g_new0(struct bt_plugin_so_shared_lib_handle, 1);
178 if (!*shared_lib_handle) {
179 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one shared library handle.");
180 status = BT_FUNC_STATUS_MEMORY_ERROR;
181 goto end;
182 }
183
184 bt_object_init_shared(&(*shared_lib_handle)->base,
185 bt_plugin_so_shared_lib_handle_destroy);
186
187 if (!path) {
188 goto end;
189 }
190
191 (*shared_lib_handle)->path = g_string_new(path);
192 if (!(*shared_lib_handle)->path) {
193 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate a GString.");
194 status = BT_FUNC_STATUS_MEMORY_ERROR;
195 goto end;
196 }
197
198 (*shared_lib_handle)->module = g_module_open(path, G_MODULE_BIND_LOCAL);
199 if (!(*shared_lib_handle)->module) {
200 /*
201 * INFO-level logging because we're only _trying_ to
202 * open this file as a Babeltrace plugin: if it's not,
203 * it's not an error. And because this can be tried
204 * during bt_plugin_find_all_from_dir(), it's not even a
205 * warning.
206 */
207 BT_LOGI("Cannot open GModule: %s: path=\"%s\"",
208 g_module_error(), path);
209 BT_OBJECT_PUT_REF_AND_RESET(*shared_lib_handle);
210 status = BT_FUNC_STATUS_NOT_FOUND;
211 goto end;
212 }
213
214 goto end;
215
216 end:
217 BT_ASSERT(*shared_lib_handle || status != BT_FUNC_STATUS_OK);
218 if (*shared_lib_handle) {
219 BT_LOGI("Created shared library handle: path=\"%s\", addr=%p",
220 path, *shared_lib_handle);
221 }
222
223 return status;
224 }
225
226 static
227 void bt_plugin_so_destroy_spec_data(struct bt_plugin *plugin)
228 {
229 struct bt_plugin_so_spec_data *spec = plugin->spec_data;
230
231 if (!plugin->spec_data) {
232 return;
233 }
234
235 BT_ASSERT(plugin->type == BT_PLUGIN_TYPE_SO);
236 BT_ASSERT(spec);
237 BT_OBJECT_PUT_REF_AND_RESET(spec->shared_lib_handle);
238 g_free(plugin->spec_data);
239 plugin->spec_data = NULL;
240 }
241
242 /*
243 * This function does the following:
244 *
245 * 1. Iterate on the plugin descriptor attributes section and set the
246 * plugin's attributes depending on the attribute types. This
247 * includes the name of the plugin, its description, and its
248 * initialization function, for example.
249 *
250 * 2. Iterate on the component class descriptors section and create one
251 * "full descriptor" (temporary structure) for each one that is found
252 * and attached to our plugin descriptor.
253 *
254 * 3. Iterate on the component class descriptor attributes section and
255 * set the corresponding full descriptor's attributes depending on
256 * the attribute types. This includes the description of the
257 * component class, as well as its initialization and destroy
258 * methods.
259 *
260 * 4. Call the user's plugin initialization function, if any is
261 * defined.
262 *
263 * 5. For each full component class descriptor, create a component class
264 * object, set its optional attributes, and add it to the plugin
265 * object.
266 *
267 * 6. Freeze the plugin object.
268 */
269 static
270 int bt_plugin_so_init(struct bt_plugin *plugin,
271 bool fail_on_load_error,
272 const struct __bt_plugin_descriptor *descriptor,
273 struct __bt_plugin_descriptor_attribute const * const *attrs_begin,
274 struct __bt_plugin_descriptor_attribute const * const *attrs_end,
275 struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_begin,
276 struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end,
277 struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin,
278 struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end)
279 {
280 /*
281 * This structure's members point to the plugin's memory
282 * (do NOT free).
283 */
284 struct comp_class_full_descriptor {
285 const struct __bt_plugin_component_class_descriptor *descriptor;
286 const char *description;
287 const char *help;
288
289 union {
290 struct {
291 bt_component_class_source_get_supported_mip_versions_method get_supported_mip_versions;
292 bt_component_class_source_initialize_method init;
293 bt_component_class_source_finalize_method finalize;
294 bt_component_class_source_query_method query;
295 bt_component_class_source_output_port_connected_method output_port_connected;
296 bt_component_class_source_message_iterator_initialize_method msg_iter_initialize;
297 bt_component_class_source_message_iterator_finalize_method msg_iter_finalize;
298 bt_component_class_source_message_iterator_seek_ns_from_origin_method msg_iter_seek_ns_from_origin;
299 bt_component_class_source_message_iterator_seek_beginning_method msg_iter_seek_beginning;
300 bt_component_class_source_message_iterator_can_seek_ns_from_origin_method msg_iter_can_seek_ns_from_origin;
301 bt_component_class_source_message_iterator_can_seek_beginning_method msg_iter_can_seek_beginning;
302 } source;
303
304 struct {
305 bt_component_class_filter_get_supported_mip_versions_method get_supported_mip_versions;
306 bt_component_class_filter_initialize_method init;
307 bt_component_class_filter_finalize_method finalize;
308 bt_component_class_filter_query_method query;
309 bt_component_class_filter_input_port_connected_method input_port_connected;
310 bt_component_class_filter_output_port_connected_method output_port_connected;
311 bt_component_class_filter_message_iterator_initialize_method msg_iter_initialize;
312 bt_component_class_filter_message_iterator_finalize_method msg_iter_finalize;
313 bt_component_class_filter_message_iterator_seek_ns_from_origin_method msg_iter_seek_ns_from_origin;
314 bt_component_class_filter_message_iterator_seek_beginning_method msg_iter_seek_beginning;
315 bt_component_class_filter_message_iterator_can_seek_ns_from_origin_method msg_iter_can_seek_ns_from_origin;
316 bt_component_class_filter_message_iterator_can_seek_beginning_method msg_iter_can_seek_beginning;
317 } filter;
318
319 struct {
320 bt_component_class_sink_get_supported_mip_versions_method get_supported_mip_versions;
321 bt_component_class_sink_initialize_method init;
322 bt_component_class_sink_finalize_method finalize;
323 bt_component_class_sink_query_method query;
324 bt_component_class_sink_input_port_connected_method input_port_connected;
325 bt_component_class_sink_graph_is_configured_method graph_is_configured;
326 } sink;
327 } methods;
328 };
329
330 int status = BT_FUNC_STATUS_OK;
331 struct __bt_plugin_descriptor_attribute const * const *cur_attr_ptr;
332 struct __bt_plugin_component_class_descriptor const * const *cur_cc_descr_ptr;
333 struct __bt_plugin_component_class_descriptor_attribute const * const *cur_cc_descr_attr_ptr;
334 struct bt_plugin_so_spec_data *spec = plugin->spec_data;
335 GArray *comp_class_full_descriptors;
336 size_t i;
337 int ret;
338
339 BT_LOGI("Initializing plugin object from descriptors found in sections: "
340 "plugin-addr=%p, plugin-path=\"%s\", "
341 "attrs-begin-addr=%p, attrs-end-addr=%p, "
342 "cc-descr-begin-addr=%p, cc-descr-end-addr=%p, "
343 "cc-descr-attrs-begin-addr=%p, cc-descr-attrs-end-addr=%p",
344 plugin,
345 spec->shared_lib_handle->path ?
346 spec->shared_lib_handle->path->str : NULL,
347 attrs_begin, attrs_end,
348 cc_descriptors_begin, cc_descriptors_end,
349 cc_descr_attrs_begin, cc_descr_attrs_end);
350 comp_class_full_descriptors = g_array_new(FALSE, TRUE,
351 sizeof(struct comp_class_full_descriptor));
352 if (!comp_class_full_descriptors) {
353 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate a GArray.");
354 status = BT_FUNC_STATUS_MEMORY_ERROR;
355 goto end;
356 }
357
358 /* Set mandatory attributes */
359 spec->descriptor = descriptor;
360 bt_plugin_set_name(plugin, descriptor->name);
361
362 /*
363 * Find and set optional attributes attached to this plugin
364 * descriptor.
365 */
366 for (cur_attr_ptr = attrs_begin; cur_attr_ptr != attrs_end; cur_attr_ptr++) {
367 const struct __bt_plugin_descriptor_attribute *cur_attr =
368 *cur_attr_ptr;
369
370 if (!cur_attr) {
371 continue;
372 }
373
374 if (cur_attr->plugin_descriptor != descriptor) {
375 continue;
376 }
377
378 switch (cur_attr->type) {
379 case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_INIT:
380 spec->init = cur_attr->value.init;
381 break;
382 case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_EXIT:
383 spec->shared_lib_handle->exit = cur_attr->value.exit;
384 break;
385 case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_AUTHOR:
386 bt_plugin_set_author(plugin, cur_attr->value.author);
387 break;
388 case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_LICENSE:
389 bt_plugin_set_license(plugin, cur_attr->value.license);
390 break;
391 case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_DESCRIPTION:
392 bt_plugin_set_description(plugin, cur_attr->value.description);
393 break;
394 case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_VERSION:
395 bt_plugin_set_version(plugin,
396 (unsigned int) cur_attr->value.version.major,
397 (unsigned int) cur_attr->value.version.minor,
398 (unsigned int) cur_attr->value.version.patch,
399 cur_attr->value.version.extra);
400 break;
401 default:
402 if (fail_on_load_error) {
403 BT_LIB_LOGW_APPEND_CAUSE(
404 "Unknown plugin descriptor attribute: "
405 "plugin-path=\"%s\", plugin-name=\"%s\", "
406 "attr-type-name=\"%s\", attr-type-id=%d",
407 spec->shared_lib_handle->path ?
408 spec->shared_lib_handle->path->str :
409 NULL,
410 descriptor->name, cur_attr->type_name,
411 cur_attr->type);
412 status = BT_FUNC_STATUS_ERROR;
413 goto end;
414 } else {
415 BT_LIB_LOGW(
416 "Ignoring unknown plugin descriptor attribute: "
417 "plugin-path=\"%s\", plugin-name=\"%s\", "
418 "attr-type-name=\"%s\", attr-type-id=%d",
419 spec->shared_lib_handle->path ?
420 spec->shared_lib_handle->path->str :
421 NULL,
422 descriptor->name, cur_attr->type_name,
423 cur_attr->type);
424 }
425
426 break;
427 }
428 }
429
430 /*
431 * Find component class descriptors attached to this plugin
432 * descriptor and initialize corresponding full component class
433 * descriptors in the array.
434 */
435 for (cur_cc_descr_ptr = cc_descriptors_begin; cur_cc_descr_ptr != cc_descriptors_end; cur_cc_descr_ptr++) {
436 const struct __bt_plugin_component_class_descriptor *cur_cc_descr =
437 *cur_cc_descr_ptr;
438 struct comp_class_full_descriptor full_descriptor = {0};
439
440 if (!cur_cc_descr) {
441 continue;
442 }
443
444 if (cur_cc_descr->plugin_descriptor != descriptor) {
445 continue;
446 }
447
448 full_descriptor.descriptor = cur_cc_descr;
449 g_array_append_val(comp_class_full_descriptors,
450 full_descriptor);
451 }
452
453 /*
454 * Find component class descriptor attributes attached to this
455 * plugin descriptor and update corresponding full component
456 * class descriptors in the array.
457 */
458 for (cur_cc_descr_attr_ptr = cc_descr_attrs_begin; cur_cc_descr_attr_ptr != cc_descr_attrs_end; cur_cc_descr_attr_ptr++) {
459 const struct __bt_plugin_component_class_descriptor_attribute *cur_cc_descr_attr =
460 *cur_cc_descr_attr_ptr;
461 enum bt_component_class_type cc_type;
462
463 if (!cur_cc_descr_attr) {
464 continue;
465 }
466
467 if (cur_cc_descr_attr->comp_class_descriptor->plugin_descriptor !=
468 descriptor) {
469 continue;
470 }
471
472 cc_type = cur_cc_descr_attr->comp_class_descriptor->type;
473
474 /* Find the corresponding component class descriptor entry */
475 for (i = 0; i < comp_class_full_descriptors->len; i++) {
476 struct comp_class_full_descriptor *cc_full_descr =
477 &g_array_index(comp_class_full_descriptors,
478 struct comp_class_full_descriptor, i);
479
480 if (cur_cc_descr_attr->comp_class_descriptor !=
481 cc_full_descr->descriptor) {
482 continue;
483 }
484
485 switch (cur_cc_descr_attr->type) {
486 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_DESCRIPTION:
487 cc_full_descr->description =
488 cur_cc_descr_attr->value.description;
489 break;
490 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_HELP:
491 cc_full_descr->help =
492 cur_cc_descr_attr->value.help;
493 break;
494 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_GET_SUPPORTED_MIP_VERSIONS_METHOD:
495 switch (cc_type) {
496 case BT_COMPONENT_CLASS_TYPE_SOURCE:
497 cc_full_descr->methods.source.get_supported_mip_versions =
498 cur_cc_descr_attr->value.source_get_supported_mip_versions_method;
499 break;
500 case BT_COMPONENT_CLASS_TYPE_FILTER:
501 cc_full_descr->methods.filter.get_supported_mip_versions =
502 cur_cc_descr_attr->value.filter_get_supported_mip_versions_method;
503 break;
504 case BT_COMPONENT_CLASS_TYPE_SINK:
505 cc_full_descr->methods.sink.get_supported_mip_versions =
506 cur_cc_descr_attr->value.sink_get_supported_mip_versions_method;
507 break;
508 default:
509 abort();
510 }
511 break;
512 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_INITIALIZE_METHOD:
513 switch (cc_type) {
514 case BT_COMPONENT_CLASS_TYPE_SOURCE:
515 cc_full_descr->methods.source.init =
516 cur_cc_descr_attr->value.source_initialize_method;
517 break;
518 case BT_COMPONENT_CLASS_TYPE_FILTER:
519 cc_full_descr->methods.filter.init =
520 cur_cc_descr_attr->value.filter_initialize_method;
521 break;
522 case BT_COMPONENT_CLASS_TYPE_SINK:
523 cc_full_descr->methods.sink.init =
524 cur_cc_descr_attr->value.sink_initialize_method;
525 break;
526 default:
527 abort();
528 }
529 break;
530 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_FINALIZE_METHOD:
531 switch (cc_type) {
532 case BT_COMPONENT_CLASS_TYPE_SOURCE:
533 cc_full_descr->methods.source.finalize =
534 cur_cc_descr_attr->value.source_finalize_method;
535 break;
536 case BT_COMPONENT_CLASS_TYPE_FILTER:
537 cc_full_descr->methods.filter.finalize =
538 cur_cc_descr_attr->value.filter_finalize_method;
539 break;
540 case BT_COMPONENT_CLASS_TYPE_SINK:
541 cc_full_descr->methods.sink.finalize =
542 cur_cc_descr_attr->value.sink_finalize_method;
543 break;
544 default:
545 abort();
546 }
547 break;
548 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_QUERY_METHOD:
549 switch (cc_type) {
550 case BT_COMPONENT_CLASS_TYPE_SOURCE:
551 cc_full_descr->methods.source.query =
552 cur_cc_descr_attr->value.source_query_method;
553 break;
554 case BT_COMPONENT_CLASS_TYPE_FILTER:
555 cc_full_descr->methods.filter.query =
556 cur_cc_descr_attr->value.filter_query_method;
557 break;
558 case BT_COMPONENT_CLASS_TYPE_SINK:
559 cc_full_descr->methods.sink.query =
560 cur_cc_descr_attr->value.sink_query_method;
561 break;
562 default:
563 abort();
564 }
565 break;
566 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_INPUT_PORT_CONNECTED_METHOD:
567 switch (cc_type) {
568 case BT_COMPONENT_CLASS_TYPE_FILTER:
569 cc_full_descr->methods.filter.input_port_connected =
570 cur_cc_descr_attr->value.filter_input_port_connected_method;
571 break;
572 case BT_COMPONENT_CLASS_TYPE_SINK:
573 cc_full_descr->methods.sink.input_port_connected =
574 cur_cc_descr_attr->value.sink_input_port_connected_method;
575 break;
576 default:
577 abort();
578 }
579 break;
580 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_OUTPUT_PORT_CONNECTED_METHOD:
581 switch (cc_type) {
582 case BT_COMPONENT_CLASS_TYPE_SOURCE:
583 cc_full_descr->methods.source.output_port_connected =
584 cur_cc_descr_attr->value.source_output_port_connected_method;
585 break;
586 case BT_COMPONENT_CLASS_TYPE_FILTER:
587 cc_full_descr->methods.filter.output_port_connected =
588 cur_cc_descr_attr->value.filter_output_port_connected_method;
589 break;
590 default:
591 abort();
592 }
593 break;
594 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_GRAPH_IS_CONFIGURED_METHOD:
595 switch (cc_type) {
596 case BT_COMPONENT_CLASS_TYPE_SINK:
597 cc_full_descr->methods.sink.graph_is_configured =
598 cur_cc_descr_attr->value.sink_graph_is_configured_method;
599 break;
600 default:
601 abort();
602 }
603 break;
604 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_INITIALIZE_METHOD:
605 switch (cc_type) {
606 case BT_COMPONENT_CLASS_TYPE_SOURCE:
607 cc_full_descr->methods.source.msg_iter_initialize =
608 cur_cc_descr_attr->value.source_msg_iter_initialize_method;
609 break;
610 case BT_COMPONENT_CLASS_TYPE_FILTER:
611 cc_full_descr->methods.filter.msg_iter_initialize =
612 cur_cc_descr_attr->value.filter_msg_iter_initialize_method;
613 break;
614 default:
615 abort();
616 }
617 break;
618 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_FINALIZE_METHOD:
619 switch (cc_type) {
620 case BT_COMPONENT_CLASS_TYPE_SOURCE:
621 cc_full_descr->methods.source.msg_iter_finalize =
622 cur_cc_descr_attr->value.source_msg_iter_finalize_method;
623 break;
624 case BT_COMPONENT_CLASS_TYPE_FILTER:
625 cc_full_descr->methods.filter.msg_iter_finalize =
626 cur_cc_descr_attr->value.filter_msg_iter_finalize_method;
627 break;
628 default:
629 abort();
630 }
631 break;
632 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_SEEK_NS_FROM_ORIGIN_METHOD:
633 switch (cc_type) {
634 case BT_COMPONENT_CLASS_TYPE_SOURCE:
635 cc_full_descr->methods.source.msg_iter_seek_ns_from_origin =
636 cur_cc_descr_attr->value.source_msg_iter_seek_ns_from_origin_method;
637 break;
638 case BT_COMPONENT_CLASS_TYPE_FILTER:
639 cc_full_descr->methods.filter.msg_iter_seek_ns_from_origin =
640 cur_cc_descr_attr->value.filter_msg_iter_seek_ns_from_origin_method;
641 break;
642 default:
643 abort();
644 }
645 break;
646 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_SEEK_BEGINNING_METHOD:
647 switch (cc_type) {
648 case BT_COMPONENT_CLASS_TYPE_SOURCE:
649 cc_full_descr->methods.source.msg_iter_seek_beginning =
650 cur_cc_descr_attr->value.source_msg_iter_seek_beginning_method;
651 break;
652 case BT_COMPONENT_CLASS_TYPE_FILTER:
653 cc_full_descr->methods.filter.msg_iter_seek_beginning =
654 cur_cc_descr_attr->value.filter_msg_iter_seek_beginning_method;
655 break;
656 default:
657 abort();
658 }
659 break;
660 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_CAN_SEEK_NS_FROM_ORIGIN_METHOD:
661 switch (cc_type) {
662 case BT_COMPONENT_CLASS_TYPE_SOURCE:
663 cc_full_descr->methods.source.msg_iter_can_seek_ns_from_origin =
664 cur_cc_descr_attr->value.source_msg_iter_can_seek_ns_from_origin_method;
665 break;
666 case BT_COMPONENT_CLASS_TYPE_FILTER:
667 cc_full_descr->methods.filter.msg_iter_can_seek_ns_from_origin =
668 cur_cc_descr_attr->value.filter_msg_iter_can_seek_ns_from_origin_method;
669 break;
670 default:
671 abort();
672 }
673 break;
674 case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_CAN_SEEK_BEGINNING_METHOD:
675 switch (cc_type) {
676 case BT_COMPONENT_CLASS_TYPE_SOURCE:
677 cc_full_descr->methods.source.msg_iter_can_seek_beginning =
678 cur_cc_descr_attr->value.source_msg_iter_can_seek_beginning_method;
679 break;
680 case BT_COMPONENT_CLASS_TYPE_FILTER:
681 cc_full_descr->methods.filter.msg_iter_can_seek_beginning =
682 cur_cc_descr_attr->value.filter_msg_iter_can_seek_beginning_method;
683 break;
684 default:
685 abort();
686 }
687 break;
688 default:
689 if (fail_on_load_error) {
690 BT_LIB_LOGW_APPEND_CAUSE(
691 "Unknown component class descriptor attribute: "
692 "plugin-path=\"%s\", "
693 "plugin-name=\"%s\", "
694 "comp-class-name=\"%s\", "
695 "comp-class-type=%s, "
696 "attr-type-name=\"%s\", "
697 "attr-type-id=%d",
698 spec->shared_lib_handle->path ?
699 spec->shared_lib_handle->path->str :
700 NULL,
701 descriptor->name,
702 cur_cc_descr_attr->comp_class_descriptor->name,
703 bt_component_class_type_string(
704 cur_cc_descr_attr->comp_class_descriptor->type),
705 cur_cc_descr_attr->type_name,
706 cur_cc_descr_attr->type);
707 status = BT_FUNC_STATUS_ERROR;
708 goto end;
709 } else {
710 BT_LIB_LOGW(
711 "Ignoring unknown component class descriptor attribute: "
712 "plugin-path=\"%s\", "
713 "plugin-name=\"%s\", "
714 "comp-class-name=\"%s\", "
715 "comp-class-type=%s, "
716 "attr-type-name=\"%s\", "
717 "attr-type-id=%d",
718 spec->shared_lib_handle->path ?
719 spec->shared_lib_handle->path->str :
720 NULL,
721 descriptor->name,
722 cur_cc_descr_attr->comp_class_descriptor->name,
723 bt_component_class_type_string(
724 cur_cc_descr_attr->comp_class_descriptor->type),
725 cur_cc_descr_attr->type_name,
726 cur_cc_descr_attr->type);
727 }
728
729 break;
730 }
731 }
732 }
733
734 /* Initialize plugin */
735 if (spec->init) {
736 enum bt_plugin_initialize_func_status init_status;
737
738 BT_LOGD_STR("Calling user's plugin initialization function.");
739 init_status = spec->init((void *) plugin);
740 BT_LOGD("User function returned: status=%s",
741 bt_common_func_status_string(init_status));
742
743 if (init_status < 0) {
744 if (fail_on_load_error) {
745 BT_LIB_LOGW_APPEND_CAUSE(
746 "User's plugin initialization function failed: "
747 "status=%s",
748 bt_common_func_status_string(init_status));
749 status = init_status;
750 goto end;
751 } else {
752 BT_LIB_LOGW(
753 "User's plugin initialization function failed: "
754 "status=%s",
755 bt_common_func_status_string(init_status));
756 status = BT_FUNC_STATUS_NOT_FOUND;
757 }
758
759 goto end;
760 }
761 }
762
763 spec->shared_lib_handle->init_called = BT_TRUE;
764
765 /* Add described component classes to plugin */
766 for (i = 0; i < comp_class_full_descriptors->len; i++) {
767 struct comp_class_full_descriptor *cc_full_descr =
768 &g_array_index(comp_class_full_descriptors,
769 struct comp_class_full_descriptor, i);
770 struct bt_component_class *comp_class = NULL;
771 struct bt_component_class_source *src_comp_class = NULL;
772 struct bt_component_class_filter *flt_comp_class = NULL;
773 struct bt_component_class_sink *sink_comp_class = NULL;
774
775 BT_LOGI("Creating and setting properties of plugin's component class: "
776 "plugin-path=\"%s\", plugin-name=\"%s\", "
777 "comp-class-name=\"%s\", comp-class-type=%s",
778 spec->shared_lib_handle->path ?
779 spec->shared_lib_handle->path->str :
780 NULL,
781 descriptor->name,
782 cc_full_descr->descriptor->name,
783 bt_component_class_type_string(
784 cc_full_descr->descriptor->type));
785
786 switch (cc_full_descr->descriptor->type) {
787 case BT_COMPONENT_CLASS_TYPE_SOURCE:
788 src_comp_class = bt_component_class_source_create(
789 cc_full_descr->descriptor->name,
790 cc_full_descr->descriptor->methods.source.msg_iter_next);
791 comp_class = bt_component_class_source_as_component_class(
792 src_comp_class);
793 break;
794 case BT_COMPONENT_CLASS_TYPE_FILTER:
795 flt_comp_class = bt_component_class_filter_create(
796 cc_full_descr->descriptor->name,
797 cc_full_descr->descriptor->methods.source.msg_iter_next);
798 comp_class = bt_component_class_filter_as_component_class(
799 flt_comp_class);
800 break;
801 case BT_COMPONENT_CLASS_TYPE_SINK:
802 sink_comp_class = bt_component_class_sink_create(
803 cc_full_descr->descriptor->name,
804 cc_full_descr->descriptor->methods.sink.consume);
805 comp_class = bt_component_class_sink_as_component_class(
806 sink_comp_class);
807 break;
808 default:
809 if (fail_on_load_error) {
810 BT_LIB_LOGW_APPEND_CAUSE(
811 "Unknown component class type: "
812 "plugin-path=\"%s\", plugin-name=\"%s\", "
813 "comp-class-name=\"%s\", comp-class-type=%d",
814 spec->shared_lib_handle->path->str ?
815 spec->shared_lib_handle->path->str :
816 NULL,
817 descriptor->name,
818 cc_full_descr->descriptor->name,
819 cc_full_descr->descriptor->type);
820 status = BT_FUNC_STATUS_ERROR;
821 goto end;
822 } else {
823 BT_LIB_LOGW(
824 "Ignoring unknown component class type: "
825 "plugin-path=\"%s\", plugin-name=\"%s\", "
826 "comp-class-name=\"%s\", comp-class-type=%d",
827 spec->shared_lib_handle->path->str ?
828 spec->shared_lib_handle->path->str :
829 NULL,
830 descriptor->name,
831 cc_full_descr->descriptor->name,
832 cc_full_descr->descriptor->type);
833 continue;
834 }
835 }
836
837 if (!comp_class) {
838 BT_LIB_LOGE_APPEND_CAUSE(
839 "Cannot create component class.");
840 status = BT_FUNC_STATUS_MEMORY_ERROR;
841 goto end;
842 }
843
844 if (cc_full_descr->description) {
845 ret = bt_component_class_set_description(
846 comp_class, cc_full_descr->description);
847 if (ret) {
848 BT_LIB_LOGE_APPEND_CAUSE(
849 "Cannot set component class's description.");
850 status = BT_FUNC_STATUS_MEMORY_ERROR;
851 BT_OBJECT_PUT_REF_AND_RESET(comp_class);
852 goto end;
853 }
854 }
855
856 if (cc_full_descr->help) {
857 ret = bt_component_class_set_help(comp_class,
858 cc_full_descr->help);
859 if (ret) {
860 BT_LIB_LOGE_APPEND_CAUSE(
861 "Cannot set component class's help string.");
862 status = BT_FUNC_STATUS_MEMORY_ERROR;
863 BT_OBJECT_PUT_REF_AND_RESET(comp_class);
864 goto end;
865 }
866 }
867
868 switch (cc_full_descr->descriptor->type) {
869 case BT_COMPONENT_CLASS_TYPE_SOURCE:
870 if (cc_full_descr->methods.source.get_supported_mip_versions) {
871 ret = bt_component_class_source_set_get_supported_mip_versions_method(
872 src_comp_class,
873 cc_full_descr->methods.source.get_supported_mip_versions);
874 if (ret) {
875 BT_LIB_LOGE_APPEND_CAUSE(
876 "Cannot set source component class's \"get supported MIP versions\" method.");
877 status = BT_FUNC_STATUS_MEMORY_ERROR;
878 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
879 goto end;
880 }
881 }
882
883 if (cc_full_descr->methods.source.init) {
884 ret = bt_component_class_source_set_initialize_method(
885 src_comp_class,
886 cc_full_descr->methods.source.init);
887 if (ret) {
888 BT_LIB_LOGE_APPEND_CAUSE(
889 "Cannot set source component class's initialization method.");
890 status = BT_FUNC_STATUS_MEMORY_ERROR;
891 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
892 goto end;
893 }
894 }
895
896 if (cc_full_descr->methods.source.finalize) {
897 ret = bt_component_class_source_set_finalize_method(
898 src_comp_class,
899 cc_full_descr->methods.source.finalize);
900 if (ret) {
901 BT_LIB_LOGE_APPEND_CAUSE(
902 "Cannot set source component class's finalization method.");
903 status = BT_FUNC_STATUS_MEMORY_ERROR;
904 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
905 goto end;
906 }
907 }
908
909 if (cc_full_descr->methods.source.query) {
910 ret = bt_component_class_source_set_query_method(
911 src_comp_class,
912 cc_full_descr->methods.source.query);
913 if (ret) {
914 BT_LIB_LOGE_APPEND_CAUSE(
915 "Cannot set source component class's query method.");
916 status = BT_FUNC_STATUS_MEMORY_ERROR;
917 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
918 goto end;
919 }
920 }
921
922 if (cc_full_descr->methods.source.output_port_connected) {
923 ret = bt_component_class_source_set_output_port_connected_method(
924 src_comp_class,
925 cc_full_descr->methods.source.output_port_connected);
926 if (ret) {
927 BT_LIB_LOGE_APPEND_CAUSE(
928 "Cannot set source component class's \"output port connected\" method.");
929 status = BT_FUNC_STATUS_MEMORY_ERROR;
930 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
931 goto end;
932 }
933 }
934
935 if (cc_full_descr->methods.source.msg_iter_initialize) {
936 ret = bt_component_class_source_set_message_iterator_initialize_method(
937 src_comp_class,
938 cc_full_descr->methods.source.msg_iter_initialize);
939 if (ret) {
940 BT_LIB_LOGE_APPEND_CAUSE(
941 "Cannot set source component class's message iterator initialization method.");
942 status = BT_FUNC_STATUS_MEMORY_ERROR;
943 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
944 goto end;
945 }
946 }
947
948 if (cc_full_descr->methods.source.msg_iter_finalize) {
949 ret = bt_component_class_source_set_message_iterator_finalize_method(
950 src_comp_class,
951 cc_full_descr->methods.source.msg_iter_finalize);
952 if (ret) {
953 BT_LIB_LOGE_APPEND_CAUSE(
954 "Cannot set source component class's message iterator finalization method.");
955 status = BT_FUNC_STATUS_MEMORY_ERROR;
956 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
957 goto end;
958 }
959 }
960
961 if (cc_full_descr->methods.source.msg_iter_seek_ns_from_origin) {
962 ret = bt_component_class_source_set_message_iterator_seek_ns_from_origin_methods(
963 src_comp_class,
964 cc_full_descr->methods.source.msg_iter_seek_ns_from_origin,
965 cc_full_descr->methods.source.msg_iter_can_seek_ns_from_origin);
966 if (ret) {
967 BT_LIB_LOGE_APPEND_CAUSE(
968 "Cannot set source component class's message iterator \"seek nanoseconds from origin\" methods.");
969 status = BT_FUNC_STATUS_MEMORY_ERROR;
970 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
971 goto end;
972 }
973 }
974
975 if (cc_full_descr->methods.source.msg_iter_seek_beginning) {
976 ret = bt_component_class_source_set_message_iterator_seek_beginning_methods(
977 src_comp_class,
978 cc_full_descr->methods.source.msg_iter_seek_beginning,
979 cc_full_descr->methods.source.msg_iter_can_seek_beginning);
980 if (ret) {
981 BT_LIB_LOGE_APPEND_CAUSE(
982 "Cannot set source component class's message iterator \"seek beginning\" methods.");
983 status = BT_FUNC_STATUS_MEMORY_ERROR;
984 BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
985 goto end;
986 }
987 }
988
989 break;
990 case BT_COMPONENT_CLASS_TYPE_FILTER:
991 if (cc_full_descr->methods.filter.get_supported_mip_versions) {
992 ret = bt_component_class_filter_set_get_supported_mip_versions_method(
993 flt_comp_class,
994 cc_full_descr->methods.filter.get_supported_mip_versions);
995 if (ret) {
996 BT_LIB_LOGE_APPEND_CAUSE(
997 "Cannot set filter component class's \"get supported MIP versions\" method.");
998 status = BT_FUNC_STATUS_MEMORY_ERROR;
999 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1000 goto end;
1001 }
1002 }
1003
1004 if (cc_full_descr->methods.filter.init) {
1005 ret = bt_component_class_filter_set_initialize_method(
1006 flt_comp_class,
1007 cc_full_descr->methods.filter.init);
1008 if (ret) {
1009 BT_LIB_LOGE_APPEND_CAUSE(
1010 "Cannot set filter component class's initialization method.");
1011 status = BT_FUNC_STATUS_MEMORY_ERROR;
1012 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1013 goto end;
1014 }
1015 }
1016
1017 if (cc_full_descr->methods.filter.finalize) {
1018 ret = bt_component_class_filter_set_finalize_method(
1019 flt_comp_class,
1020 cc_full_descr->methods.filter.finalize);
1021 if (ret) {
1022 BT_LIB_LOGE_APPEND_CAUSE(
1023 "Cannot set filter component class's finalization method.");
1024 status = BT_FUNC_STATUS_MEMORY_ERROR;
1025 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1026 goto end;
1027 }
1028 }
1029
1030 if (cc_full_descr->methods.filter.query) {
1031 ret = bt_component_class_filter_set_query_method(
1032 flt_comp_class,
1033 cc_full_descr->methods.filter.query);
1034 if (ret) {
1035 BT_LIB_LOGE_APPEND_CAUSE(
1036 "Cannot set filter component class's query method.");
1037 status = BT_FUNC_STATUS_MEMORY_ERROR;
1038 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1039 goto end;
1040 }
1041 }
1042
1043 if (cc_full_descr->methods.filter.input_port_connected) {
1044 ret = bt_component_class_filter_set_input_port_connected_method(
1045 flt_comp_class,
1046 cc_full_descr->methods.filter.input_port_connected);
1047 if (ret) {
1048 BT_LIB_LOGE_APPEND_CAUSE(
1049 "Cannot set filter component class's \"input port connected\" method.");
1050 status = BT_FUNC_STATUS_MEMORY_ERROR;
1051 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1052 goto end;
1053 }
1054 }
1055
1056 if (cc_full_descr->methods.filter.output_port_connected) {
1057 ret = bt_component_class_filter_set_output_port_connected_method(
1058 flt_comp_class,
1059 cc_full_descr->methods.filter.output_port_connected);
1060 if (ret) {
1061 BT_LIB_LOGE_APPEND_CAUSE(
1062 "Cannot set filter component class's \"output port connected\" method.");
1063 status = BT_FUNC_STATUS_MEMORY_ERROR;
1064 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1065 goto end;
1066 }
1067 }
1068
1069 if (cc_full_descr->methods.filter.msg_iter_initialize) {
1070 ret = bt_component_class_filter_set_message_iterator_initialize_method(
1071 flt_comp_class,
1072 cc_full_descr->methods.filter.msg_iter_initialize);
1073 if (ret) {
1074 BT_LIB_LOGE_APPEND_CAUSE(
1075 "Cannot set filter component class's message iterator initialization method.");
1076 status = BT_FUNC_STATUS_MEMORY_ERROR;
1077 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1078 goto end;
1079 }
1080 }
1081
1082 if (cc_full_descr->methods.filter.msg_iter_finalize) {
1083 ret = bt_component_class_filter_set_message_iterator_finalize_method(
1084 flt_comp_class,
1085 cc_full_descr->methods.filter.msg_iter_finalize);
1086 if (ret) {
1087 BT_LIB_LOGE_APPEND_CAUSE(
1088 "Cannot set filter component class's message iterator finalization method.");
1089 status = BT_FUNC_STATUS_MEMORY_ERROR;
1090 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1091 goto end;
1092 }
1093 }
1094
1095 if (cc_full_descr->methods.filter.msg_iter_seek_ns_from_origin) {
1096 ret = bt_component_class_filter_set_message_iterator_seek_ns_from_origin_methods(
1097 flt_comp_class,
1098 cc_full_descr->methods.filter.msg_iter_seek_ns_from_origin,
1099 cc_full_descr->methods.filter.msg_iter_can_seek_ns_from_origin);
1100 if (ret) {
1101 BT_LIB_LOGE_APPEND_CAUSE(
1102 "Cannot set filter component class's message iterator \"seek nanoseconds from origin\" methods.");
1103 status = BT_FUNC_STATUS_MEMORY_ERROR;
1104 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1105 goto end;
1106 }
1107 }
1108
1109 if (cc_full_descr->methods.filter.msg_iter_seek_beginning) {
1110 ret = bt_component_class_filter_set_message_iterator_seek_beginning_methods(
1111 flt_comp_class,
1112 cc_full_descr->methods.filter.msg_iter_seek_beginning,
1113 cc_full_descr->methods.filter.msg_iter_can_seek_beginning);
1114 if (ret) {
1115 BT_LIB_LOGE_APPEND_CAUSE(
1116 "Cannot set filter component class's message iterator \"seek beginning\" methods.");
1117 status = BT_FUNC_STATUS_MEMORY_ERROR;
1118 BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
1119 goto end;
1120 }
1121 }
1122
1123 break;
1124 case BT_COMPONENT_CLASS_TYPE_SINK:
1125 if (cc_full_descr->methods.sink.get_supported_mip_versions) {
1126 ret = bt_component_class_sink_set_get_supported_mip_versions_method(
1127 sink_comp_class,
1128 cc_full_descr->methods.sink.get_supported_mip_versions);
1129 if (ret) {
1130 BT_LIB_LOGE_APPEND_CAUSE(
1131 "Cannot set sink component class's \"get supported MIP versions\" method.");
1132 status = BT_FUNC_STATUS_MEMORY_ERROR;
1133 BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
1134 goto end;
1135 }
1136 }
1137
1138 if (cc_full_descr->methods.sink.init) {
1139 ret = bt_component_class_sink_set_initialize_method(
1140 sink_comp_class,
1141 cc_full_descr->methods.sink.init);
1142 if (ret) {
1143 BT_LIB_LOGE_APPEND_CAUSE(
1144 "Cannot set sink component class's initialization method.");
1145 status = BT_FUNC_STATUS_MEMORY_ERROR;
1146 BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
1147 goto end;
1148 }
1149 }
1150
1151 if (cc_full_descr->methods.sink.finalize) {
1152 ret = bt_component_class_sink_set_finalize_method(
1153 sink_comp_class,
1154 cc_full_descr->methods.sink.finalize);
1155 if (ret) {
1156 BT_LIB_LOGE_APPEND_CAUSE(
1157 "Cannot set sink component class's finalization method.");
1158 status = BT_FUNC_STATUS_MEMORY_ERROR;
1159 BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
1160 goto end;
1161 }
1162 }
1163
1164 if (cc_full_descr->methods.sink.query) {
1165 ret = bt_component_class_sink_set_query_method(
1166 sink_comp_class,
1167 cc_full_descr->methods.sink.query);
1168 if (ret) {
1169 BT_LIB_LOGE_APPEND_CAUSE(
1170 "Cannot set sink component class's query method.");
1171 status = BT_FUNC_STATUS_MEMORY_ERROR;
1172 BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
1173 goto end;
1174 }
1175 }
1176
1177 if (cc_full_descr->methods.sink.input_port_connected) {
1178 ret = bt_component_class_sink_set_input_port_connected_method(
1179 sink_comp_class,
1180 cc_full_descr->methods.sink.input_port_connected);
1181 if (ret) {
1182 BT_LIB_LOGE_APPEND_CAUSE(
1183 "Cannot set sink component class's \"input port connected\" method.");
1184 status = BT_FUNC_STATUS_MEMORY_ERROR;
1185 BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
1186 goto end;
1187 }
1188 }
1189
1190 if (cc_full_descr->methods.sink.graph_is_configured) {
1191 ret = bt_component_class_sink_set_graph_is_configured_method(
1192 sink_comp_class,
1193 cc_full_descr->methods.sink.graph_is_configured);
1194 if (ret) {
1195 BT_LIB_LOGE_APPEND_CAUSE(
1196 "Cannot set sink component class's \"graph is configured\" method.");
1197 status = BT_FUNC_STATUS_MEMORY_ERROR;
1198 BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
1199 goto end;
1200 }
1201 }
1202
1203 break;
1204 default:
1205 abort();
1206 }
1207
1208 /*
1209 * Add component class to the plugin object.
1210 *
1211 * This will call back
1212 * bt_plugin_so_on_add_component_class() so that we can
1213 * add a mapping in the component class list when we
1214 * know the component class is successfully added.
1215 */
1216 status = bt_plugin_add_component_class(plugin,
1217 (void *) comp_class);
1218 BT_OBJECT_PUT_REF_AND_RESET(comp_class);
1219 if (status < 0) {
1220 BT_LIB_LOGE_APPEND_CAUSE(
1221 "Cannot add component class to plugin.");
1222 goto end;
1223 }
1224 }
1225
1226 end:
1227 g_array_free(comp_class_full_descriptors, TRUE);
1228 return status;
1229 }
1230
1231 static
1232 struct bt_plugin *bt_plugin_so_create_empty(
1233 struct bt_plugin_so_shared_lib_handle *shared_lib_handle)
1234 {
1235 struct bt_plugin *plugin;
1236 struct bt_plugin_so_spec_data *spec;
1237
1238 plugin = bt_plugin_create_empty(BT_PLUGIN_TYPE_SO);
1239 if (!plugin) {
1240 goto error;
1241 }
1242
1243 plugin->destroy_spec_data = bt_plugin_so_destroy_spec_data;
1244 plugin->spec_data = g_new0(struct bt_plugin_so_spec_data, 1);
1245 if (!plugin->spec_data) {
1246 BT_LIB_LOGE_APPEND_CAUSE(
1247 "Failed to allocate one SO plugin specific data structure.");
1248 goto error;
1249 }
1250
1251 spec = plugin->spec_data;
1252 spec->shared_lib_handle = shared_lib_handle;
1253 bt_object_get_no_null_check(spec->shared_lib_handle);
1254 goto end;
1255
1256 error:
1257 BT_OBJECT_PUT_REF_AND_RESET(plugin);
1258
1259 end:
1260 return plugin;
1261 }
1262
1263 static
1264 size_t count_non_null_items_in_section(const void *begin, const void *end)
1265 {
1266 size_t count = 0;
1267 const int * const *begin_int = (const int * const *) begin;
1268 const int * const *end_int = (const int * const *) end;
1269 const int * const *iter;
1270
1271 for (iter = begin_int; iter != end_int; iter++) {
1272 if (*iter) {
1273 count++;
1274 }
1275 }
1276
1277 return count;
1278 }
1279
1280 static
1281 int bt_plugin_so_create_all_from_sections(
1282 struct bt_plugin_so_shared_lib_handle *shared_lib_handle,
1283 bool fail_on_load_error,
1284 struct __bt_plugin_descriptor const * const *descriptors_begin,
1285 struct __bt_plugin_descriptor const * const *descriptors_end,
1286 struct __bt_plugin_descriptor_attribute const * const *attrs_begin,
1287 struct __bt_plugin_descriptor_attribute const * const *attrs_end,
1288 struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_begin,
1289 struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end,
1290 struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin,
1291 struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end,
1292 struct bt_plugin_set **plugin_set_out)
1293 {
1294 int status = BT_FUNC_STATUS_OK;
1295 size_t descriptor_count;
1296 size_t attrs_count;
1297 size_t cc_descriptors_count;
1298 size_t cc_descr_attrs_count;
1299 size_t i;
1300
1301 BT_ASSERT(shared_lib_handle);
1302 BT_ASSERT(plugin_set_out);
1303 *plugin_set_out = NULL;
1304 descriptor_count = count_non_null_items_in_section(descriptors_begin, descriptors_end);
1305 attrs_count = count_non_null_items_in_section(attrs_begin, attrs_end);
1306 cc_descriptors_count = count_non_null_items_in_section(cc_descriptors_begin, cc_descriptors_end);
1307 cc_descr_attrs_count = count_non_null_items_in_section(cc_descr_attrs_begin, cc_descr_attrs_end);
1308 BT_LOGI("Creating all SO plugins from sections: "
1309 "plugin-path=\"%s\", "
1310 "descr-begin-addr=%p, descr-end-addr=%p, "
1311 "attrs-begin-addr=%p, attrs-end-addr=%p, "
1312 "cc-descr-begin-addr=%p, cc-descr-end-addr=%p, "
1313 "cc-descr-attrs-begin-addr=%p, cc-descr-attrs-end-addr=%p, "
1314 "descr-count=%zu, attrs-count=%zu, "
1315 "cc-descr-count=%zu, cc-descr-attrs-count=%zu",
1316 shared_lib_handle->path ? shared_lib_handle->path->str : NULL,
1317 descriptors_begin, descriptors_end,
1318 attrs_begin, attrs_end,
1319 cc_descriptors_begin, cc_descriptors_end,
1320 cc_descr_attrs_begin, cc_descr_attrs_end,
1321 descriptor_count, attrs_count,
1322 cc_descriptors_count, cc_descr_attrs_count);
1323 *plugin_set_out = bt_plugin_set_create();
1324 if (!*plugin_set_out) {
1325 BT_LIB_LOGE_APPEND_CAUSE("Cannot create empty plugin set.");
1326 status = BT_FUNC_STATUS_MEMORY_ERROR;
1327 goto error;
1328 }
1329
1330 for (i = 0; i < descriptors_end - descriptors_begin; i++) {
1331 const struct __bt_plugin_descriptor *descriptor =
1332 descriptors_begin[i];
1333 struct bt_plugin *plugin;
1334
1335 if (!descriptor) {
1336 continue;
1337 }
1338
1339 BT_LOGI("Creating plugin object for plugin: "
1340 "name=\"%s\", abi-major=%d, abi-minor=%d",
1341 descriptor->name, descriptor->major, descriptor->minor);
1342
1343 if (descriptor->major > __BT_PLUGIN_VERSION_MAJOR) {
1344 if (fail_on_load_error) {
1345 BT_LIB_LOGW_APPEND_CAUSE(
1346 "Unknown ABI major version: abi-major=%d",
1347 descriptor->major);
1348 status = BT_FUNC_STATUS_ERROR;
1349 goto error;
1350 } else {
1351 BT_LIB_LOGW(
1352 "Unknown ABI major version: abi-major=%d",
1353 descriptor->major);
1354 continue;
1355 }
1356 }
1357
1358 plugin = bt_plugin_so_create_empty(shared_lib_handle);
1359 if (!plugin) {
1360 BT_LIB_LOGE_APPEND_CAUSE(
1361 "Cannot create empty shared library handle.");
1362 status = BT_FUNC_STATUS_MEMORY_ERROR;
1363 goto error;
1364 }
1365
1366 if (shared_lib_handle->path) {
1367 bt_plugin_set_path(plugin,
1368 shared_lib_handle->path->str);
1369 }
1370
1371 status = bt_plugin_so_init(plugin, fail_on_load_error,
1372 descriptor, attrs_begin, attrs_end,
1373 cc_descriptors_begin, cc_descriptors_end,
1374 cc_descr_attrs_begin, cc_descr_attrs_end);
1375 if (status == BT_FUNC_STATUS_OK) {
1376 /* Add to plugin set */
1377 bt_plugin_set_add_plugin(*plugin_set_out, plugin);
1378 BT_OBJECT_PUT_REF_AND_RESET(plugin);
1379 } else if (status < 0) {
1380 /*
1381 * bt_plugin_so_init() handles
1382 * `fail_on_load_error`, so this is a "real"
1383 * error.
1384 */
1385 BT_LIB_LOGW_APPEND_CAUSE(
1386 "Cannot initialize SO plugin object from sections.");
1387 BT_OBJECT_PUT_REF_AND_RESET(plugin);
1388 goto error;
1389 }
1390
1391 BT_ASSERT(!plugin);
1392 }
1393
1394 BT_ASSERT(*plugin_set_out);
1395
1396 if ((*plugin_set_out)->plugins->len == 0) {
1397 BT_OBJECT_PUT_REF_AND_RESET(*plugin_set_out);
1398 status = BT_FUNC_STATUS_NOT_FOUND;
1399 }
1400
1401 goto end;
1402
1403 error:
1404 BT_ASSERT(status < 0);
1405 BT_OBJECT_PUT_REF_AND_RESET(*plugin_set_out);
1406
1407 end:
1408 return status;
1409 }
1410
1411 BT_HIDDEN
1412 int bt_plugin_so_create_all_from_static(bool fail_on_load_error,
1413 struct bt_plugin_set **plugin_set_out)
1414 {
1415 int status;
1416 struct bt_plugin_so_shared_lib_handle *shared_lib_handle = NULL;
1417
1418 BT_ASSERT(plugin_set_out);
1419 *plugin_set_out = NULL;
1420 status = bt_plugin_so_shared_lib_handle_create(NULL,
1421 &shared_lib_handle);
1422 if (status != BT_FUNC_STATUS_OK) {
1423 BT_ASSERT(!shared_lib_handle);
1424 goto end;
1425 }
1426
1427 BT_ASSERT(shared_lib_handle);
1428 BT_LOGD_STR("Creating all SO plugins from built-in plugins.");
1429 status = bt_plugin_so_create_all_from_sections(shared_lib_handle,
1430 fail_on_load_error,
1431 __bt_get_begin_section_plugin_descriptors(),
1432 __bt_get_end_section_plugin_descriptors(),
1433 __bt_get_begin_section_plugin_descriptor_attributes(),
1434 __bt_get_end_section_plugin_descriptor_attributes(),
1435 __bt_get_begin_section_component_class_descriptors(),
1436 __bt_get_end_section_component_class_descriptors(),
1437 __bt_get_begin_section_component_class_descriptor_attributes(),
1438 __bt_get_end_section_component_class_descriptor_attributes(),
1439 plugin_set_out);
1440 BT_ASSERT((status == BT_FUNC_STATUS_OK && *plugin_set_out &&
1441 (*plugin_set_out)->plugins->len > 0) || !*plugin_set_out);
1442
1443 end:
1444 BT_OBJECT_PUT_REF_AND_RESET(shared_lib_handle);
1445 return status;
1446 }
1447
1448 BT_HIDDEN
1449 int bt_plugin_so_create_all_from_file(const char *path,
1450 bool fail_on_load_error, struct bt_plugin_set **plugin_set_out)
1451 {
1452 size_t path_len;
1453 int status;
1454 struct __bt_plugin_descriptor const * const *descriptors_begin = NULL;
1455 struct __bt_plugin_descriptor const * const *descriptors_end = NULL;
1456 struct __bt_plugin_descriptor_attribute const * const *attrs_begin = NULL;
1457 struct __bt_plugin_descriptor_attribute const * const *attrs_end = NULL;
1458 struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_begin = NULL;
1459 struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end = NULL;
1460 struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin = NULL;
1461 struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end = NULL;
1462 struct __bt_plugin_descriptor const * const *(*get_begin_section_plugin_descriptors)(void);
1463 struct __bt_plugin_descriptor const * const *(*get_end_section_plugin_descriptors)(void);
1464 struct __bt_plugin_descriptor_attribute const * const *(*get_begin_section_plugin_descriptor_attributes)(void);
1465 struct __bt_plugin_descriptor_attribute const * const *(*get_end_section_plugin_descriptor_attributes)(void);
1466 struct __bt_plugin_component_class_descriptor const * const *(*get_begin_section_component_class_descriptors)(void);
1467 struct __bt_plugin_component_class_descriptor const * const *(*get_end_section_component_class_descriptors)(void);
1468 struct __bt_plugin_component_class_descriptor_attribute const * const *(*get_begin_section_component_class_descriptor_attributes)(void);
1469 struct __bt_plugin_component_class_descriptor_attribute const * const *(*get_end_section_component_class_descriptor_attributes)(void);
1470 bt_bool is_libtool_wrapper = BT_FALSE, is_shared_object = BT_FALSE;
1471 struct bt_plugin_so_shared_lib_handle *shared_lib_handle = NULL;
1472
1473 BT_ASSERT(path);
1474 BT_ASSERT(plugin_set_out);
1475 *plugin_set_out = NULL;
1476 path_len = strlen(path);
1477
1478 /*
1479 * An SO plugin file must have a known plugin file suffix. So the file
1480 * path must be longer than the suffix length.
1481 */
1482 if (path_len <= PLUGIN_SUFFIX_LEN) {
1483 BT_LOGI("Path is too short to be an `.so` or `.la` plugin file:"
1484 "path=%s, path-length=%zu, min-length=%zu",
1485 path, path_len, PLUGIN_SUFFIX_LEN);
1486 status = BT_FUNC_STATUS_NOT_FOUND;
1487 goto end;
1488 }
1489
1490 BT_LOGI("Trying to create all SO plugins from file: path=\"%s\"", path);
1491 path_len++;
1492
1493 /*
1494 * Check if the file ends with a known plugin file type suffix
1495 * (i.e. .so or .la on Linux).
1496 */
1497 is_libtool_wrapper = !strncmp(LIBTOOL_PLUGIN_SUFFIX,
1498 path + path_len - LIBTOOL_PLUGIN_SUFFIX_LEN,
1499 LIBTOOL_PLUGIN_SUFFIX_LEN);
1500 is_shared_object = !strncmp(NATIVE_PLUGIN_SUFFIX,
1501 path + path_len - NATIVE_PLUGIN_SUFFIX_LEN,
1502 NATIVE_PLUGIN_SUFFIX_LEN);
1503 if (!is_shared_object && !is_libtool_wrapper) {
1504 /* Name indicates this is not a plugin file; not an error */
1505 BT_LOGI("File is not an SO plugin file: path=\"%s\"", path);
1506 status = BT_FUNC_STATUS_NOT_FOUND;
1507 goto end;
1508 }
1509
1510 status = bt_plugin_so_shared_lib_handle_create(path,
1511 &shared_lib_handle);
1512 if (status != BT_FUNC_STATUS_OK) {
1513 /* bt_plugin_so_shared_lib_handle_create() logs more details */
1514 BT_ASSERT(!shared_lib_handle);
1515 goto end;
1516 }
1517
1518 if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_plugin_descriptors",
1519 (gpointer *) &get_begin_section_plugin_descriptors)) {
1520 descriptors_begin = get_begin_section_plugin_descriptors();
1521 } else {
1522 /*
1523 * Use this first symbol to know whether or not this
1524 * shared object _looks like_ a Babeltrace plugin. Since
1525 * g_module_symbol() failed, assume that this is not a
1526 * Babeltrace plugin, so it's not an error.
1527 */
1528 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1529 "symbol=\"%s\"", path,
1530 "__bt_get_begin_section_plugin_descriptors");
1531 status = BT_FUNC_STATUS_NOT_FOUND;
1532 goto end;
1533 }
1534
1535 /*
1536 * If g_module_symbol() fails for any of the other symbols, fail
1537 * if `fail_on_load_error` is true.
1538 */
1539 if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_plugin_descriptors",
1540 (gpointer *) &get_end_section_plugin_descriptors)) {
1541 descriptors_end = get_end_section_plugin_descriptors();
1542 } else {
1543 if (fail_on_load_error) {
1544 BT_LIB_LOGW_APPEND_CAUSE(
1545 "Cannot resolve plugin symbol: path=\"%s\", "
1546 "symbol=\"%s\"", path,
1547 "__bt_get_end_section_plugin_descriptors");
1548 status = BT_FUNC_STATUS_ERROR;
1549 } else {
1550 BT_LIB_LOGW(
1551 "Cannot resolve plugin symbol: path=\"%s\", "
1552 "symbol=\"%s\"", path,
1553 "__bt_get_end_section_plugin_descriptors");
1554 status = BT_FUNC_STATUS_NOT_FOUND;
1555 }
1556
1557 goto end;
1558 }
1559
1560 if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_plugin_descriptor_attributes",
1561 (gpointer *) &get_begin_section_plugin_descriptor_attributes)) {
1562 attrs_begin = get_begin_section_plugin_descriptor_attributes();
1563 } else {
1564 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1565 "symbol=\"%s\"", path,
1566 "__bt_get_begin_section_plugin_descriptor_attributes");
1567 }
1568
1569 if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_plugin_descriptor_attributes",
1570 (gpointer *) &get_end_section_plugin_descriptor_attributes)) {
1571 attrs_end = get_end_section_plugin_descriptor_attributes();
1572 } else {
1573 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1574 "symbol=\"%s\"", path,
1575 "__bt_get_end_section_plugin_descriptor_attributes");
1576 }
1577
1578 if ((!!attrs_begin - !!attrs_end) != 0) {
1579 if (fail_on_load_error) {
1580 BT_LIB_LOGW_APPEND_CAUSE(
1581 "Found section start or end symbol, but not both: "
1582 "path=\"%s\", symbol-start=\"%s\", "
1583 "symbol-end=\"%s\", symbol-start-addr=%p, "
1584 "symbol-end-addr=%p",
1585 path, "__bt_get_begin_section_plugin_descriptor_attributes",
1586 "__bt_get_end_section_plugin_descriptor_attributes",
1587 attrs_begin, attrs_end);
1588 status = BT_FUNC_STATUS_ERROR;
1589 } else {
1590 BT_LIB_LOGW(
1591 "Found section start or end symbol, but not both: "
1592 "path=\"%s\", symbol-start=\"%s\", "
1593 "symbol-end=\"%s\", symbol-start-addr=%p, "
1594 "symbol-end-addr=%p",
1595 path, "__bt_get_begin_section_plugin_descriptor_attributes",
1596 "__bt_get_end_section_plugin_descriptor_attributes",
1597 attrs_begin, attrs_end);
1598 status = BT_FUNC_STATUS_NOT_FOUND;
1599 }
1600
1601 goto end;
1602 }
1603
1604 if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_component_class_descriptors",
1605 (gpointer *) &get_begin_section_component_class_descriptors)) {
1606 cc_descriptors_begin = get_begin_section_component_class_descriptors();
1607 } else {
1608 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1609 "symbol=\"%s\"", path,
1610 "__bt_get_begin_section_component_class_descriptors");
1611 }
1612
1613 if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_component_class_descriptors",
1614 (gpointer *) &get_end_section_component_class_descriptors)) {
1615 cc_descriptors_end = get_end_section_component_class_descriptors();
1616 } else {
1617 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1618 "symbol=\"%s\"", path,
1619 "__bt_get_end_section_component_class_descriptors");
1620 }
1621
1622 if ((!!cc_descriptors_begin - !!cc_descriptors_end) != 0) {
1623 if (fail_on_load_error) {
1624 BT_LIB_LOGW_APPEND_CAUSE(
1625 "Found section start or end symbol, but not both: "
1626 "path=\"%s\", symbol-start=\"%s\", "
1627 "symbol-end=\"%s\", symbol-start-addr=%p, "
1628 "symbol-end-addr=%p",
1629 path, "__bt_get_begin_section_component_class_descriptors",
1630 "__bt_get_end_section_component_class_descriptors",
1631 cc_descriptors_begin, cc_descriptors_end);
1632 status = BT_FUNC_STATUS_ERROR;
1633 } else {
1634 BT_LIB_LOGW(
1635 "Found section start or end symbol, but not both: "
1636 "path=\"%s\", symbol-start=\"%s\", "
1637 "symbol-end=\"%s\", symbol-start-addr=%p, "
1638 "symbol-end-addr=%p",
1639 path, "__bt_get_begin_section_component_class_descriptors",
1640 "__bt_get_end_section_component_class_descriptors",
1641 cc_descriptors_begin, cc_descriptors_end);
1642 status = BT_FUNC_STATUS_NOT_FOUND;
1643 }
1644
1645 goto end;
1646 }
1647
1648 if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_component_class_descriptor_attributes",
1649 (gpointer *) &get_begin_section_component_class_descriptor_attributes)) {
1650 cc_descr_attrs_begin = get_begin_section_component_class_descriptor_attributes();
1651 } else {
1652 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1653 "symbol=\"%s\"", path,
1654 "__bt_get_begin_section_component_class_descriptor_attributes");
1655 }
1656
1657 if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_component_class_descriptor_attributes",
1658 (gpointer *) &get_end_section_component_class_descriptor_attributes)) {
1659 cc_descr_attrs_end = get_end_section_component_class_descriptor_attributes();
1660 } else {
1661 BT_LOGI("Cannot resolve plugin symbol: path=\"%s\", "
1662 "symbol=\"%s\"", path,
1663 "__bt_get_end_section_component_class_descriptor_attributes");
1664 }
1665
1666 if ((!!cc_descr_attrs_begin - !!cc_descr_attrs_end) != 0) {
1667 if (fail_on_load_error) {
1668 BT_LIB_LOGW_APPEND_CAUSE(
1669 "Found section start or end symbol, but not both: "
1670 "path=\"%s\", symbol-start=\"%s\", "
1671 "symbol-end=\"%s\", symbol-start-addr=%p, "
1672 "symbol-end-addr=%p",
1673 path, "__bt_get_begin_section_component_class_descriptor_attributes",
1674 "__bt_get_end_section_component_class_descriptor_attributes",
1675 cc_descr_attrs_begin, cc_descr_attrs_end);
1676 status = BT_FUNC_STATUS_ERROR;
1677 } else {
1678 BT_LIB_LOGW(
1679 "Found section start or end symbol, but not both: "
1680 "path=\"%s\", symbol-start=\"%s\", "
1681 "symbol-end=\"%s\", symbol-start-addr=%p, "
1682 "symbol-end-addr=%p",
1683 path, "__bt_get_begin_section_component_class_descriptor_attributes",
1684 "__bt_get_end_section_component_class_descriptor_attributes",
1685 cc_descr_attrs_begin, cc_descr_attrs_end);
1686 status = BT_FUNC_STATUS_NOT_FOUND;
1687 }
1688
1689 goto end;
1690 }
1691
1692 /* Initialize plugin */
1693 BT_LOGD_STR("Initializing plugin object.");
1694 status = bt_plugin_so_create_all_from_sections(shared_lib_handle,
1695 fail_on_load_error,
1696 descriptors_begin, descriptors_end, attrs_begin, attrs_end,
1697 cc_descriptors_begin, cc_descriptors_end,
1698 cc_descr_attrs_begin, cc_descr_attrs_end, plugin_set_out);
1699
1700 end:
1701 BT_OBJECT_PUT_REF_AND_RESET(shared_lib_handle);
1702 return status;
1703 }
1704
1705 static
1706 void plugin_comp_class_destroy_listener(struct bt_component_class *comp_class,
1707 void *data)
1708 {
1709 bt_list_del(&comp_class->node);
1710 BT_OBJECT_PUT_REF_AND_RESET(comp_class->so_handle);
1711 BT_LOGD("Component class destroyed: removed entry from list: "
1712 "comp-cls-addr=%p", comp_class);
1713 }
1714
1715 void bt_plugin_so_on_add_component_class(struct bt_plugin *plugin,
1716 struct bt_component_class *comp_class)
1717 {
1718 struct bt_plugin_so_spec_data *spec = plugin->spec_data;
1719
1720 BT_ASSERT(plugin->spec_data);
1721 BT_ASSERT(plugin->type == BT_PLUGIN_TYPE_SO);
1722
1723 bt_list_add(&comp_class->node, &component_class_list);
1724 comp_class->so_handle = spec->shared_lib_handle;
1725 bt_object_get_no_null_check(comp_class->so_handle);
1726
1727 /* Add our custom destroy listener */
1728 bt_component_class_add_destroy_listener(comp_class,
1729 plugin_comp_class_destroy_listener, NULL);
1730 }
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