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55bb57e0 PP |
1 | /* |
2 | * plugin-so.c | |
3 | * | |
4 | * Babeltrace Plugin (shared object) | |
5 | * | |
6 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
7 | * Copyright 2017 Philippe Proulx <pproulx@efficios.com> | |
8 | * | |
9 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in | |
19 | * all copies or substantial portions of the Software. | |
20 | * | |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
28 | */ | |
29 | ||
3d9990ac | 30 | #include <babeltrace/compiler-internal.h> |
55bb57e0 PP |
31 | #include <babeltrace/ref.h> |
32 | #include <babeltrace/plugin/plugin-internal.h> | |
33 | #include <babeltrace/plugin/plugin-so-internal.h> | |
34 | #include <babeltrace/plugin/plugin-dev.h> | |
35 | #include <babeltrace/plugin/plugin-internal.h> | |
b2e0c907 | 36 | #include <babeltrace/graph/component-class-internal.h> |
c55a9f58 | 37 | #include <babeltrace/types.h> |
55bb57e0 | 38 | #include <string.h> |
0fbb9a9f | 39 | #include <stdlib.h> |
55bb57e0 PP |
40 | #include <glib.h> |
41 | #include <gmodule.h> | |
42 | ||
43 | #define NATIVE_PLUGIN_SUFFIX ".so" | |
44 | #define NATIVE_PLUGIN_SUFFIX_LEN sizeof(NATIVE_PLUGIN_SUFFIX) | |
45 | #define LIBTOOL_PLUGIN_SUFFIX ".la" | |
46 | #define LIBTOOL_PLUGIN_SUFFIX_LEN sizeof(LIBTOOL_PLUGIN_SUFFIX) | |
47 | ||
48 | #define PLUGIN_SUFFIX_LEN max_t(size_t, sizeof(NATIVE_PLUGIN_SUFFIX), \ | |
49 | sizeof(LIBTOOL_PLUGIN_SUFFIX)) | |
50 | ||
51 | #define SECTION_BEGIN(_name) (&(__start_##_name)) | |
52 | #define SECTION_END(_name) (&(__stop_##_name)) | |
53 | #define SECTION_ELEMENT_COUNT(_name) (SECTION_END(_name) - SECTION_BEGIN(_name)) | |
54 | ||
55 | #define DECLARE_SECTION(_type, _name) \ | |
56 | extern _type __start_##_name __attribute((weak)); \ | |
57 | extern _type __stop_##_name __attribute((weak)) | |
58 | ||
59 | DECLARE_SECTION(struct __bt_plugin_descriptor const *, __bt_plugin_descriptors); | |
60 | DECLARE_SECTION(struct __bt_plugin_descriptor_attribute const *, __bt_plugin_descriptor_attributes); | |
61 | DECLARE_SECTION(struct __bt_plugin_component_class_descriptor const *, __bt_plugin_component_class_descriptors); | |
62 | DECLARE_SECTION(struct __bt_plugin_component_class_descriptor_attribute const *, __bt_plugin_component_class_descriptor_attributes); | |
63 | ||
64 | /* | |
65 | * This hash table, global to the library, maps component class pointers | |
66 | * to shared library handles. | |
67 | * | |
68 | * The keys (component classes) are NOT owned by this hash table, whereas | |
69 | * the values (shared library handles) are owned by this hash table. | |
70 | * | |
71 | * The keys are the component classes created with | |
72 | * bt_plugin_add_component_class(). They keep the shared library handle | |
73 | * object created by their plugin alive so that the plugin's code is | |
74 | * not discarded when it could still be in use by living components | |
75 | * created from those component classes: | |
76 | * | |
77 | * [component] --ref-> [component class] --through this HT-> [shlib handle] | |
78 | * | |
79 | * This hash table exists for two reasons: | |
80 | * | |
81 | * 1. To allow this application: | |
82 | * | |
83 | * my_plugins = bt_plugin_create_all_from_file("/path/to/my-plugin.so"); | |
84 | * // instantiate components from a plugin's component classes | |
85 | * // put plugins and free my_plugins here | |
86 | * // user code of instantiated components still exists | |
87 | * | |
88 | * 2. To decouple the plugin subsystem from the component subsystem: | |
89 | * while plugins objects need to know component class objects, the | |
90 | * opposite is not necessary, thus it makes no sense for a component | |
91 | * class to keep a reference to the plugin object from which it was | |
92 | * created. | |
93 | * | |
94 | * An entry is removed from this HT when a component class is destroyed | |
95 | * thanks to a custom destroy listener. When the entry is removed, the | |
96 | * GLib function calls the value destroy notifier of the HT, which is | |
97 | * bt_put(). This decreases the reference count of the mapped shared | |
98 | * library handle. Assuming the original plugin object which contained | |
99 | * some component classes is put first, when the last component class is | |
100 | * removed from this HT, the shared library handle object's reference | |
101 | * count falls to zero and the shared library is finally closed. | |
102 | */ | |
103 | static | |
104 | GHashTable *comp_classes_to_shlib_handles; | |
105 | ||
106 | __attribute__((constructor)) static | |
107 | void init_comp_classes_to_shlib_handles(void) { | |
108 | comp_classes_to_shlib_handles = g_hash_table_new_full(g_direct_hash, | |
109 | g_direct_equal, NULL, bt_put); | |
110 | assert(comp_classes_to_shlib_handles); | |
111 | } | |
112 | ||
113 | __attribute__((destructor)) static | |
114 | void fini_comp_classes_to_shlib_handles(void) { | |
115 | if (comp_classes_to_shlib_handles) { | |
116 | g_hash_table_destroy(comp_classes_to_shlib_handles); | |
117 | } | |
118 | } | |
119 | ||
120 | static | |
121 | void bt_plugin_so_shared_lib_handle_destroy(struct bt_object *obj) | |
122 | { | |
123 | struct bt_plugin_so_shared_lib_handle *shared_lib_handle; | |
124 | ||
125 | assert(obj); | |
126 | shared_lib_handle = container_of(obj, | |
127 | struct bt_plugin_so_shared_lib_handle, base); | |
128 | ||
129 | if (shared_lib_handle->init_called && shared_lib_handle->exit) { | |
130 | enum bt_plugin_status status = shared_lib_handle->exit(); | |
131 | ||
132 | if (status < 0) { | |
133 | const char *path = shared_lib_handle->path ? | |
134 | shared_lib_handle->path->str : "[built-in]"; | |
135 | ||
136 | printf_verbose("Plugin in module `%s` exited with error %d\n", | |
137 | path, status); | |
138 | } | |
139 | } | |
140 | ||
141 | if (shared_lib_handle->module) { | |
f1447220 PP |
142 | #ifndef NDEBUG |
143 | /* | |
144 | * Valgrind shows incomplete stack traces when | |
145 | * dynamically loaded libraries are closed before it | |
146 | * finishes. Use the BABELTRACE_NO_DLCLOSE in a debug | |
147 | * build to avoid this. | |
148 | */ | |
149 | const char *var = getenv("BABELTRACE_NO_DLCLOSE"); | |
150 | ||
151 | if (!var || strcmp(var, "1") != 0) { | |
152 | #endif | |
153 | if (!g_module_close(shared_lib_handle->module)) { | |
154 | printf_error("Module close error: %s\n", | |
155 | g_module_error()); | |
156 | } | |
157 | #ifndef NDEBUG | |
55bb57e0 | 158 | } |
f1447220 | 159 | #endif |
55bb57e0 PP |
160 | } |
161 | ||
162 | if (shared_lib_handle->path) { | |
163 | g_string_free(shared_lib_handle->path, TRUE); | |
164 | } | |
165 | ||
166 | g_free(shared_lib_handle); | |
167 | } | |
168 | ||
169 | static | |
170 | struct bt_plugin_so_shared_lib_handle *bt_plugin_so_shared_lib_handle_create( | |
171 | const char *path) | |
172 | { | |
173 | struct bt_plugin_so_shared_lib_handle *shared_lib_handle = NULL; | |
174 | ||
175 | shared_lib_handle = g_new0(struct bt_plugin_so_shared_lib_handle, 1); | |
176 | if (!shared_lib_handle) { | |
177 | goto error; | |
178 | } | |
179 | ||
180 | bt_object_init(shared_lib_handle, bt_plugin_so_shared_lib_handle_destroy); | |
181 | ||
182 | if (!path) { | |
183 | goto end; | |
184 | } | |
185 | ||
186 | shared_lib_handle->path = g_string_new(path); | |
187 | if (!shared_lib_handle->path) { | |
188 | goto error; | |
189 | } | |
190 | ||
191 | shared_lib_handle->module = g_module_open(path, 0); | |
192 | if (!shared_lib_handle->module) { | |
193 | printf_verbose("Module open error: %s\n", g_module_error()); | |
194 | goto error; | |
195 | } | |
196 | ||
197 | goto end; | |
198 | ||
199 | error: | |
200 | BT_PUT(shared_lib_handle); | |
201 | ||
202 | end: | |
203 | return shared_lib_handle; | |
204 | } | |
205 | ||
6fbd4105 | 206 | static |
55bb57e0 PP |
207 | void bt_plugin_so_destroy_spec_data(struct bt_plugin *plugin) |
208 | { | |
209 | struct bt_plugin_so_spec_data *spec = plugin->spec_data; | |
210 | ||
211 | if (!plugin->spec_data) { | |
212 | return; | |
213 | } | |
214 | ||
215 | assert(plugin->type == BT_PLUGIN_TYPE_SO); | |
216 | assert(spec); | |
217 | BT_PUT(spec->shared_lib_handle); | |
218 | g_free(plugin->spec_data); | |
219 | plugin->spec_data = NULL; | |
220 | } | |
221 | ||
222 | /* | |
223 | * This function does the following: | |
224 | * | |
225 | * 1. Iterate on the plugin descriptor attributes section and set the | |
226 | * plugin's attributes depending on the attribute types. This | |
227 | * includes the name of the plugin, its description, and its | |
228 | * initialization function, for example. | |
229 | * | |
230 | * 2. Iterate on the component class descriptors section and create one | |
231 | * "full descriptor" (temporary structure) for each one that is found | |
232 | * and attached to our plugin descriptor. | |
233 | * | |
234 | * 3. Iterate on the component class descriptor attributes section and | |
235 | * set the corresponding full descriptor's attributes depending on | |
236 | * the attribute types. This includes the description of the | |
237 | * component class, as well as its initialization and destroy | |
238 | * methods. | |
239 | * | |
240 | * 4. Call the user's plugin initialization function, if any is | |
241 | * defined. | |
242 | * | |
243 | * 5. For each full component class descriptor, create a component class | |
244 | * object, set its optional attributes, and add it to the plugin | |
245 | * object. | |
246 | * | |
247 | * 6. Freeze the plugin object. | |
248 | */ | |
249 | static | |
250 | enum bt_plugin_status bt_plugin_so_init( | |
251 | struct bt_plugin *plugin, | |
252 | const struct __bt_plugin_descriptor *descriptor, | |
253 | struct __bt_plugin_descriptor_attribute const * const *attrs_begin, | |
254 | struct __bt_plugin_descriptor_attribute const * const *attrs_end, | |
255 | struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_begin, | |
256 | struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end, | |
257 | struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin, | |
258 | struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end) | |
259 | { | |
260 | /* | |
261 | * This structure's members point to the plugin's memory | |
262 | * (do NOT free). | |
263 | */ | |
264 | struct comp_class_full_descriptor { | |
265 | const struct __bt_plugin_component_class_descriptor *descriptor; | |
266 | const char *description; | |
279b3f15 | 267 | const char *help; |
55bb57e0 | 268 | bt_component_class_init_method init_method; |
64cadc66 | 269 | bt_component_class_finalize_method finalize_method; |
a67681c1 | 270 | bt_component_class_query_method query_method; |
72b913fb | 271 | bt_component_class_accept_port_connection_method accept_port_connection_method; |
0d8b4d8e | 272 | bt_component_class_port_connected_method port_connected_method; |
72b913fb | 273 | bt_component_class_port_disconnected_method port_disconnected_method; |
55bb57e0 PP |
274 | struct bt_component_class_iterator_methods iterator_methods; |
275 | }; | |
276 | ||
277 | enum bt_plugin_status status = BT_PLUGIN_STATUS_OK; | |
278 | struct __bt_plugin_descriptor_attribute const * const *cur_attr_ptr; | |
279 | struct __bt_plugin_component_class_descriptor const * const *cur_cc_descr_ptr; | |
280 | struct __bt_plugin_component_class_descriptor_attribute const * const *cur_cc_descr_attr_ptr; | |
281 | struct bt_plugin_so_spec_data *spec = plugin->spec_data; | |
282 | GArray *comp_class_full_descriptors; | |
283 | size_t i; | |
284 | int ret; | |
285 | ||
286 | comp_class_full_descriptors = g_array_new(FALSE, TRUE, | |
287 | sizeof(struct comp_class_full_descriptor)); | |
288 | if (!comp_class_full_descriptors) { | |
289 | status = BT_PLUGIN_STATUS_ERROR; | |
290 | goto end; | |
291 | } | |
292 | ||
293 | /* Set mandatory attributes */ | |
294 | spec->descriptor = descriptor; | |
295 | bt_plugin_set_name(plugin, descriptor->name); | |
296 | ||
297 | /* | |
298 | * Find and set optional attributes attached to this plugin | |
299 | * descriptor. | |
300 | */ | |
301 | for (cur_attr_ptr = attrs_begin; cur_attr_ptr != attrs_end; cur_attr_ptr++) { | |
302 | const struct __bt_plugin_descriptor_attribute *cur_attr = | |
303 | *cur_attr_ptr; | |
304 | ||
305 | if (cur_attr->plugin_descriptor != descriptor) { | |
306 | continue; | |
307 | } | |
308 | ||
309 | switch (cur_attr->type) { | |
310 | case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_INIT: | |
311 | spec->init = cur_attr->value.init; | |
312 | break; | |
313 | case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_EXIT: | |
314 | spec->shared_lib_handle->exit = cur_attr->value.exit; | |
315 | break; | |
316 | case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_AUTHOR: | |
317 | bt_plugin_set_author(plugin, cur_attr->value.author); | |
318 | break; | |
319 | case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_LICENSE: | |
320 | bt_plugin_set_license(plugin, cur_attr->value.license); | |
321 | break; | |
322 | case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_DESCRIPTION: | |
323 | bt_plugin_set_description(plugin, cur_attr->value.description); | |
324 | break; | |
325 | case BT_PLUGIN_DESCRIPTOR_ATTRIBUTE_TYPE_VERSION: | |
326 | bt_plugin_set_version(plugin, | |
327 | (unsigned int) cur_attr->value.version.major, | |
328 | (unsigned int) cur_attr->value.version.minor, | |
329 | (unsigned int) cur_attr->value.version.patch, | |
330 | cur_attr->value.version.extra); | |
331 | break; | |
332 | default: | |
333 | printf_verbose("WARNING: Unknown attribute \"%s\" (type %d) for plugin %s\n", | |
334 | cur_attr->type_name, cur_attr->type, | |
335 | descriptor->name); | |
336 | break; | |
337 | } | |
338 | } | |
339 | ||
340 | /* | |
341 | * Find component class descriptors attached to this plugin | |
342 | * descriptor and initialize corresponding full component class | |
343 | * descriptors in the array. | |
344 | */ | |
345 | for (cur_cc_descr_ptr = cc_descriptors_begin; cur_cc_descr_ptr != cc_descriptors_end; cur_cc_descr_ptr++) { | |
346 | const struct __bt_plugin_component_class_descriptor *cur_cc_descr = | |
347 | *cur_cc_descr_ptr; | |
348 | struct comp_class_full_descriptor full_descriptor = {0}; | |
349 | ||
350 | if (cur_cc_descr->plugin_descriptor != descriptor) { | |
351 | continue; | |
352 | } | |
353 | ||
354 | full_descriptor.descriptor = cur_cc_descr; | |
355 | g_array_append_val(comp_class_full_descriptors, | |
356 | full_descriptor); | |
357 | } | |
358 | ||
359 | /* | |
360 | * Find component class descriptor attributes attached to this | |
361 | * plugin descriptor and update corresponding full component | |
362 | * class descriptors in the array. | |
363 | */ | |
364 | for (cur_cc_descr_attr_ptr = cc_descr_attrs_begin; cur_cc_descr_attr_ptr != cc_descr_attrs_end; cur_cc_descr_attr_ptr++) { | |
365 | const struct __bt_plugin_component_class_descriptor_attribute *cur_cc_descr_attr = | |
366 | *cur_cc_descr_attr_ptr; | |
367 | ||
368 | if (cur_cc_descr_attr->comp_class_descriptor->plugin_descriptor != | |
369 | descriptor) { | |
370 | continue; | |
371 | } | |
372 | ||
373 | /* Find the corresponding component class descriptor entry */ | |
374 | for (i = 0; i < comp_class_full_descriptors->len; i++) { | |
375 | struct comp_class_full_descriptor *cc_full_descr = | |
376 | &g_array_index(comp_class_full_descriptors, | |
377 | struct comp_class_full_descriptor, i); | |
378 | ||
379 | if (cur_cc_descr_attr->comp_class_descriptor == | |
380 | cc_full_descr->descriptor) { | |
381 | switch (cur_cc_descr_attr->type) { | |
382 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_DESCRIPTION: | |
383 | cc_full_descr->description = | |
384 | cur_cc_descr_attr->value.description; | |
385 | break; | |
279b3f15 PP |
386 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_HELP: |
387 | cc_full_descr->help = | |
388 | cur_cc_descr_attr->value.help; | |
389 | break; | |
55bb57e0 PP |
390 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_INIT_METHOD: |
391 | cc_full_descr->init_method = | |
392 | cur_cc_descr_attr->value.init_method; | |
393 | break; | |
64cadc66 PP |
394 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_FINALIZE_METHOD: |
395 | cc_full_descr->finalize_method = | |
396 | cur_cc_descr_attr->value.finalize_method; | |
55bb57e0 | 397 | break; |
a67681c1 PP |
398 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_QUERY_METHOD: |
399 | cc_full_descr->query_method = | |
400 | cur_cc_descr_attr->value.query_method; | |
8463eac2 | 401 | break; |
72b913fb PP |
402 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_ACCEPT_PORT_CONNECTION_METHOD: |
403 | cc_full_descr->accept_port_connection_method = | |
404 | cur_cc_descr_attr->value.accept_port_connection_method; | |
405 | break; | |
0d8b4d8e PP |
406 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_PORT_CONNECTED_METHOD: |
407 | cc_full_descr->port_connected_method = | |
408 | cur_cc_descr_attr->value.port_connected_method; | |
409 | break; | |
72b913fb PP |
410 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_PORT_DISCONNECTED_METHOD: |
411 | cc_full_descr->port_disconnected_method = | |
412 | cur_cc_descr_attr->value.port_disconnected_method; | |
55bb57e0 PP |
413 | break; |
414 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_NOTIF_ITER_INIT_METHOD: | |
415 | cc_full_descr->iterator_methods.init = | |
416 | cur_cc_descr_attr->value.notif_iter_init_method; | |
417 | break; | |
64cadc66 PP |
418 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_NOTIF_ITER_FINALIZE_METHOD: |
419 | cc_full_descr->iterator_methods.finalize = | |
420 | cur_cc_descr_attr->value.notif_iter_finalize_method; | |
55bb57e0 PP |
421 | break; |
422 | case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_NOTIF_ITER_SEEK_TIME_METHOD: | |
423 | cc_full_descr->iterator_methods.seek_time = | |
424 | cur_cc_descr_attr->value.notif_iter_seek_time_method; | |
425 | break; | |
426 | default: | |
427 | printf_verbose("WARNING: Unknown attribute \"%s\" (type %d) for component class %s (type %d) in plugin %s\n", | |
428 | cur_cc_descr_attr->type_name, | |
429 | cur_cc_descr_attr->type, | |
430 | cur_cc_descr_attr->comp_class_descriptor->name, | |
431 | cur_cc_descr_attr->comp_class_descriptor->type, | |
432 | descriptor->name); | |
433 | break; | |
434 | } | |
435 | } | |
436 | } | |
437 | } | |
438 | ||
439 | /* Initialize plugin */ | |
440 | if (spec->init) { | |
441 | status = spec->init(plugin); | |
442 | if (status < 0) { | |
443 | printf_verbose("Plugin `%s` initialization error: %d\n", | |
444 | bt_plugin_get_name(plugin), status); | |
445 | goto end; | |
446 | } | |
447 | } | |
448 | ||
c55a9f58 | 449 | spec->shared_lib_handle->init_called = BT_TRUE; |
55bb57e0 PP |
450 | |
451 | /* Add described component classes to plugin */ | |
452 | for (i = 0; i < comp_class_full_descriptors->len; i++) { | |
453 | struct comp_class_full_descriptor *cc_full_descr = | |
454 | &g_array_index(comp_class_full_descriptors, | |
455 | struct comp_class_full_descriptor, i); | |
456 | struct bt_component_class *comp_class; | |
457 | ||
458 | switch (cc_full_descr->descriptor->type) { | |
459 | case BT_COMPONENT_CLASS_TYPE_SOURCE: | |
460 | comp_class = bt_component_class_source_create( | |
461 | cc_full_descr->descriptor->name, | |
55bb57e0 PP |
462 | cc_full_descr->descriptor->methods.source.notif_iter_next); |
463 | break; | |
464 | case BT_COMPONENT_CLASS_TYPE_FILTER: | |
465 | comp_class = bt_component_class_filter_create( | |
466 | cc_full_descr->descriptor->name, | |
55bb57e0 PP |
467 | cc_full_descr->descriptor->methods.source.notif_iter_next); |
468 | break; | |
469 | case BT_COMPONENT_CLASS_TYPE_SINK: | |
470 | comp_class = bt_component_class_sink_create( | |
471 | cc_full_descr->descriptor->name, | |
472 | cc_full_descr->descriptor->methods.sink.consume); | |
473 | break; | |
474 | default: | |
475 | printf_verbose("WARNING: Unknown component class type %d for component class %s in plugin %s\n", | |
476 | cc_full_descr->descriptor->type, | |
477 | cc_full_descr->descriptor->name, | |
478 | descriptor->name); | |
479 | continue; | |
480 | } | |
481 | ||
482 | if (!comp_class) { | |
483 | status = BT_PLUGIN_STATUS_ERROR; | |
484 | goto end; | |
485 | } | |
486 | ||
487 | if (cc_full_descr->description) { | |
488 | ret = bt_component_class_set_description(comp_class, | |
489 | cc_full_descr->description); | |
490 | if (ret) { | |
491 | status = BT_PLUGIN_STATUS_ERROR; | |
492 | BT_PUT(comp_class); | |
493 | goto end; | |
494 | } | |
495 | } | |
496 | ||
279b3f15 PP |
497 | if (cc_full_descr->help) { |
498 | ret = bt_component_class_set_help(comp_class, | |
499 | cc_full_descr->help); | |
500 | if (ret) { | |
501 | status = BT_PLUGIN_STATUS_ERROR; | |
502 | BT_PUT(comp_class); | |
503 | goto end; | |
504 | } | |
505 | } | |
506 | ||
55bb57e0 PP |
507 | if (cc_full_descr->init_method) { |
508 | ret = bt_component_class_set_init_method(comp_class, | |
509 | cc_full_descr->init_method); | |
510 | if (ret) { | |
511 | status = BT_PLUGIN_STATUS_ERROR; | |
512 | BT_PUT(comp_class); | |
513 | goto end; | |
514 | } | |
515 | } | |
516 | ||
64cadc66 PP |
517 | if (cc_full_descr->finalize_method) { |
518 | ret = bt_component_class_set_finalize_method(comp_class, | |
519 | cc_full_descr->finalize_method); | |
55bb57e0 PP |
520 | if (ret) { |
521 | status = BT_PLUGIN_STATUS_ERROR; | |
522 | BT_PUT(comp_class); | |
523 | goto end; | |
524 | } | |
525 | } | |
526 | ||
a67681c1 PP |
527 | if (cc_full_descr->query_method) { |
528 | ret = bt_component_class_set_query_method( | |
529 | comp_class, cc_full_descr->query_method); | |
8463eac2 PP |
530 | if (ret) { |
531 | status = BT_PLUGIN_STATUS_ERROR; | |
532 | BT_PUT(comp_class); | |
533 | goto end; | |
534 | } | |
535 | } | |
536 | ||
72b913fb PP |
537 | if (cc_full_descr->accept_port_connection_method) { |
538 | ret = bt_component_class_set_accept_port_connection_method( | |
539 | comp_class, cc_full_descr->accept_port_connection_method); | |
540 | if (ret) { | |
541 | status = BT_PLUGIN_STATUS_ERROR; | |
542 | BT_PUT(comp_class); | |
543 | goto end; | |
544 | } | |
545 | } | |
546 | ||
0d8b4d8e PP |
547 | if (cc_full_descr->port_connected_method) { |
548 | ret = bt_component_class_set_port_connected_method( | |
549 | comp_class, cc_full_descr->port_connected_method); | |
550 | if (ret) { | |
551 | status = BT_PLUGIN_STATUS_ERROR; | |
552 | BT_PUT(comp_class); | |
553 | goto end; | |
554 | } | |
555 | } | |
556 | ||
72b913fb PP |
557 | if (cc_full_descr->port_disconnected_method) { |
558 | ret = bt_component_class_set_port_disconnected_method( | |
559 | comp_class, cc_full_descr->port_disconnected_method); | |
2d41b99e JG |
560 | if (ret) { |
561 | status = BT_PLUGIN_STATUS_ERROR; | |
562 | BT_PUT(comp_class); | |
563 | goto end; | |
564 | } | |
565 | } | |
566 | ||
55bb57e0 PP |
567 | switch (cc_full_descr->descriptor->type) { |
568 | case BT_COMPONENT_CLASS_TYPE_SOURCE: | |
569 | if (cc_full_descr->iterator_methods.init) { | |
570 | ret = bt_component_class_source_set_notification_iterator_init_method( | |
571 | comp_class, | |
572 | cc_full_descr->iterator_methods.init); | |
573 | if (ret) { | |
574 | status = BT_PLUGIN_STATUS_ERROR; | |
575 | BT_PUT(comp_class); | |
576 | goto end; | |
577 | } | |
578 | } | |
579 | ||
64cadc66 PP |
580 | if (cc_full_descr->iterator_methods.finalize) { |
581 | ret = bt_component_class_source_set_notification_iterator_finalize_method( | |
55bb57e0 | 582 | comp_class, |
64cadc66 | 583 | cc_full_descr->iterator_methods.finalize); |
55bb57e0 PP |
584 | if (ret) { |
585 | status = BT_PLUGIN_STATUS_ERROR; | |
586 | BT_PUT(comp_class); | |
587 | goto end; | |
588 | } | |
589 | } | |
590 | ||
591 | if (cc_full_descr->iterator_methods.seek_time) { | |
592 | ret = bt_component_class_source_set_notification_iterator_seek_time_method( | |
593 | comp_class, | |
594 | cc_full_descr->iterator_methods.seek_time); | |
595 | if (ret) { | |
596 | status = BT_PLUGIN_STATUS_ERROR; | |
597 | BT_PUT(comp_class); | |
598 | goto end; | |
599 | } | |
600 | } | |
601 | break; | |
602 | case BT_COMPONENT_CLASS_TYPE_FILTER: | |
55bb57e0 PP |
603 | if (cc_full_descr->iterator_methods.init) { |
604 | ret = bt_component_class_filter_set_notification_iterator_init_method( | |
605 | comp_class, | |
606 | cc_full_descr->iterator_methods.init); | |
607 | if (ret) { | |
608 | status = BT_PLUGIN_STATUS_ERROR; | |
609 | BT_PUT(comp_class); | |
610 | goto end; | |
611 | } | |
612 | } | |
613 | ||
64cadc66 PP |
614 | if (cc_full_descr->iterator_methods.finalize) { |
615 | ret = bt_component_class_filter_set_notification_iterator_finalize_method( | |
55bb57e0 | 616 | comp_class, |
64cadc66 | 617 | cc_full_descr->iterator_methods.finalize); |
55bb57e0 PP |
618 | if (ret) { |
619 | status = BT_PLUGIN_STATUS_ERROR; | |
620 | BT_PUT(comp_class); | |
621 | goto end; | |
622 | } | |
623 | } | |
624 | ||
625 | if (cc_full_descr->iterator_methods.seek_time) { | |
626 | ret = bt_component_class_filter_set_notification_iterator_seek_time_method( | |
627 | comp_class, | |
628 | cc_full_descr->iterator_methods.seek_time); | |
629 | if (ret) { | |
630 | status = BT_PLUGIN_STATUS_ERROR; | |
631 | BT_PUT(comp_class); | |
632 | goto end; | |
633 | } | |
634 | } | |
635 | break; | |
636 | case BT_COMPONENT_CLASS_TYPE_SINK: | |
55bb57e0 PP |
637 | break; |
638 | default: | |
0fbb9a9f | 639 | abort(); |
55bb57e0 PP |
640 | } |
641 | ||
642 | /* | |
643 | * Add component class to the plugin object. | |
644 | * | |
645 | * This will call back | |
646 | * bt_plugin_so_on_add_component_class() so that we can | |
647 | * add a mapping in comp_classes_to_shlib_handles when | |
648 | * we know the component class is successfully added. | |
649 | */ | |
650 | status = bt_plugin_add_component_class(plugin, | |
651 | comp_class); | |
652 | BT_PUT(comp_class); | |
653 | if (status < 0) { | |
654 | printf_verbose("Cannot add component class %s (type %d) to plugin `%s`: status = %d\n", | |
655 | cc_full_descr->descriptor->name, | |
656 | cc_full_descr->descriptor->type, | |
657 | bt_plugin_get_name(plugin), status); | |
658 | goto end; | |
659 | } | |
660 | } | |
661 | ||
662 | /* | |
663 | * All the plugin's component classes should be added at this | |
664 | * point. We freeze the plugin so that it's not possible to add | |
665 | * component classes to this plugin object after this stage | |
666 | * (plugin object becomes immutable). | |
667 | */ | |
668 | bt_plugin_freeze(plugin); | |
669 | ||
670 | end: | |
671 | g_array_free(comp_class_full_descriptors, TRUE); | |
672 | return status; | |
673 | } | |
674 | ||
675 | static | |
676 | struct bt_plugin *bt_plugin_so_create_empty( | |
677 | struct bt_plugin_so_shared_lib_handle *shared_lib_handle) | |
678 | { | |
679 | struct bt_plugin *plugin; | |
680 | struct bt_plugin_so_spec_data *spec; | |
681 | ||
682 | plugin = bt_plugin_create_empty(BT_PLUGIN_TYPE_SO); | |
683 | if (!plugin) { | |
684 | goto error; | |
685 | } | |
686 | ||
6fbd4105 | 687 | plugin->destroy_spec_data = bt_plugin_so_destroy_spec_data; |
55bb57e0 PP |
688 | plugin->spec_data = g_new0(struct bt_plugin_so_spec_data, 1); |
689 | if (!plugin->spec_data) { | |
690 | goto error; | |
691 | } | |
692 | ||
693 | spec = plugin->spec_data; | |
694 | spec->shared_lib_handle = bt_get(shared_lib_handle); | |
695 | goto end; | |
696 | ||
697 | error: | |
698 | BT_PUT(plugin); | |
699 | ||
700 | end: | |
701 | return plugin; | |
702 | } | |
703 | ||
704 | static | |
a8ff38ef | 705 | struct bt_plugin_set *bt_plugin_so_create_all_from_sections( |
55bb57e0 PP |
706 | struct bt_plugin_so_shared_lib_handle *shared_lib_handle, |
707 | struct __bt_plugin_descriptor const * const *descriptors_begin, | |
708 | struct __bt_plugin_descriptor const * const *descriptors_end, | |
709 | struct __bt_plugin_descriptor_attribute const * const *attrs_begin, | |
710 | struct __bt_plugin_descriptor_attribute const * const *attrs_end, | |
711 | struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_begin, | |
712 | struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end, | |
713 | struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin, | |
714 | struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end) | |
715 | { | |
716 | size_t descriptor_count; | |
717 | size_t attrs_count; | |
718 | size_t cc_descriptors_count; | |
719 | size_t cc_descr_attrs_count; | |
720 | size_t i; | |
a8ff38ef | 721 | struct bt_plugin_set *plugin_set = NULL; |
55bb57e0 PP |
722 | |
723 | descriptor_count = descriptors_end - descriptors_begin; | |
724 | attrs_count = attrs_end - attrs_begin; | |
725 | cc_descriptors_count = cc_descriptors_end - cc_descriptors_begin; | |
726 | cc_descr_attrs_count = cc_descr_attrs_end - cc_descr_attrs_begin; | |
727 | printf_verbose("Section: Plugin descriptors: [%p - %p], (%zu elements)\n", | |
728 | descriptors_begin, descriptors_end, descriptor_count); | |
729 | printf_verbose("Section: Plugin descriptor attributes: [%p - %p], (%zu elements)\n", | |
730 | attrs_begin, attrs_end, attrs_count); | |
731 | printf_verbose("Section: Plugin component class descriptors: [%p - %p], (%zu elements)\n", | |
732 | cc_descriptors_begin, cc_descriptors_end, cc_descriptors_count); | |
733 | printf_verbose("Section: Plugin component class descriptor attributes: [%p - %p], (%zu elements)\n", | |
734 | cc_descr_attrs_begin, cc_descr_attrs_end, cc_descr_attrs_count); | |
a8ff38ef PP |
735 | plugin_set = bt_plugin_set_create(); |
736 | if (!plugin_set) { | |
55bb57e0 PP |
737 | goto error; |
738 | } | |
739 | ||
740 | for (i = 0; i < descriptor_count; i++) { | |
741 | enum bt_plugin_status status; | |
742 | const struct __bt_plugin_descriptor *descriptor = | |
743 | descriptors_begin[i]; | |
744 | struct bt_plugin *plugin; | |
745 | ||
746 | printf_verbose("Loading plugin %s (ABI %d.%d)\n", descriptor->name, | |
747 | descriptor->major, descriptor->minor); | |
748 | ||
749 | if (descriptor->major > __BT_PLUGIN_VERSION_MAJOR) { | |
750 | printf_error("Unknown plugin's major version: %d\n", | |
751 | descriptor->major); | |
752 | goto error; | |
753 | } | |
754 | ||
755 | plugin = bt_plugin_so_create_empty(shared_lib_handle); | |
756 | if (!plugin) { | |
757 | printf_error("Cannot allocate plugin object for plugin %s\n", | |
758 | descriptor->name); | |
759 | goto error; | |
760 | } | |
761 | ||
762 | if (shared_lib_handle && shared_lib_handle->path) { | |
763 | bt_plugin_set_path(plugin, shared_lib_handle->path->str); | |
764 | } | |
765 | ||
766 | status = bt_plugin_so_init(plugin, descriptor, attrs_begin, | |
767 | attrs_end, cc_descriptors_begin, cc_descriptors_end, | |
768 | cc_descr_attrs_begin, cc_descr_attrs_end); | |
769 | if (status < 0) { | |
770 | printf_error("Cannot initialize plugin object %s\n", | |
771 | descriptor->name); | |
772 | BT_PUT(plugin); | |
773 | goto error; | |
774 | } | |
775 | ||
a8ff38ef PP |
776 | /* Add to plugin set */ |
777 | bt_plugin_set_add_plugin(plugin_set, plugin); | |
778 | bt_put(plugin); | |
55bb57e0 PP |
779 | } |
780 | ||
781 | goto end; | |
782 | ||
783 | error: | |
a8ff38ef | 784 | BT_PUT(plugin_set); |
55bb57e0 PP |
785 | |
786 | end: | |
a8ff38ef | 787 | return plugin_set; |
55bb57e0 PP |
788 | } |
789 | ||
790 | BT_HIDDEN | |
a8ff38ef | 791 | struct bt_plugin_set *bt_plugin_so_create_all_from_static(void) |
55bb57e0 | 792 | { |
a8ff38ef | 793 | struct bt_plugin_set *plugin_set = NULL; |
55bb57e0 PP |
794 | struct bt_plugin_so_shared_lib_handle *shared_lib_handle = |
795 | bt_plugin_so_shared_lib_handle_create(NULL); | |
796 | ||
797 | if (!shared_lib_handle) { | |
798 | goto end; | |
799 | } | |
800 | ||
a8ff38ef | 801 | plugin_set = bt_plugin_so_create_all_from_sections(shared_lib_handle, |
55bb57e0 PP |
802 | SECTION_BEGIN(__bt_plugin_descriptors), |
803 | SECTION_END(__bt_plugin_descriptors), | |
804 | SECTION_BEGIN(__bt_plugin_descriptor_attributes), | |
805 | SECTION_END(__bt_plugin_descriptor_attributes), | |
806 | SECTION_BEGIN(__bt_plugin_component_class_descriptors), | |
807 | SECTION_END(__bt_plugin_component_class_descriptors), | |
808 | SECTION_BEGIN(__bt_plugin_component_class_descriptor_attributes), | |
809 | SECTION_END(__bt_plugin_component_class_descriptor_attributes)); | |
810 | ||
811 | end: | |
812 | BT_PUT(shared_lib_handle); | |
813 | ||
a8ff38ef | 814 | return plugin_set; |
55bb57e0 PP |
815 | } |
816 | ||
817 | BT_HIDDEN | |
a8ff38ef | 818 | struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path) |
55bb57e0 PP |
819 | { |
820 | size_t path_len; | |
a8ff38ef | 821 | struct bt_plugin_set *plugin_set = NULL; |
55bb57e0 PP |
822 | struct __bt_plugin_descriptor const * const *descriptors_begin = NULL; |
823 | struct __bt_plugin_descriptor const * const *descriptors_end = NULL; | |
824 | struct __bt_plugin_descriptor_attribute const * const *attrs_begin = NULL; | |
825 | struct __bt_plugin_descriptor_attribute const * const *attrs_end = NULL; | |
826 | struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_begin = NULL; | |
827 | struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end = NULL; | |
828 | struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin = NULL; | |
829 | struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end = NULL; | |
c55a9f58 | 830 | bt_bool is_libtool_wrapper = BT_FALSE, is_shared_object = BT_FALSE; |
55bb57e0 PP |
831 | struct bt_plugin_so_shared_lib_handle *shared_lib_handle = NULL; |
832 | ||
833 | if (!path) { | |
834 | goto end; | |
835 | } | |
836 | ||
837 | path_len = strlen(path); | |
838 | if (path_len <= PLUGIN_SUFFIX_LEN) { | |
839 | goto end; | |
840 | } | |
841 | ||
842 | path_len++; | |
843 | /* | |
844 | * Check if the file ends with a known plugin file type suffix (i.e. .so | |
845 | * or .la on Linux). | |
846 | */ | |
847 | is_libtool_wrapper = !strncmp(LIBTOOL_PLUGIN_SUFFIX, | |
848 | path + path_len - LIBTOOL_PLUGIN_SUFFIX_LEN, | |
849 | LIBTOOL_PLUGIN_SUFFIX_LEN); | |
850 | is_shared_object = !strncmp(NATIVE_PLUGIN_SUFFIX, | |
851 | path + path_len - NATIVE_PLUGIN_SUFFIX_LEN, | |
852 | NATIVE_PLUGIN_SUFFIX_LEN); | |
853 | if (!is_shared_object && !is_libtool_wrapper) { | |
854 | /* Name indicates that this is not a plugin file. */ | |
855 | goto end; | |
856 | } | |
857 | ||
858 | shared_lib_handle = bt_plugin_so_shared_lib_handle_create(path); | |
859 | if (!shared_lib_handle) { | |
860 | goto end; | |
861 | } | |
862 | ||
863 | if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_descriptors", | |
864 | (gpointer *) &descriptors_begin)) { | |
865 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
866 | "__start___bt_plugin_descriptors", | |
867 | g_module_name(shared_lib_handle->module)); | |
868 | goto end; | |
869 | } | |
870 | ||
871 | if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_descriptors", | |
872 | (gpointer *) &descriptors_end)) { | |
873 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
874 | "__stop___bt_plugin_descriptors", | |
875 | g_module_name(shared_lib_handle->module)); | |
876 | goto end; | |
877 | } | |
878 | ||
879 | if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_descriptor_attributes", | |
880 | (gpointer *) &attrs_begin)) { | |
881 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
882 | "__start___bt_plugin_descriptor_attributes", | |
883 | g_module_name(shared_lib_handle->module)); | |
884 | } | |
885 | ||
886 | if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_descriptor_attributes", | |
887 | (gpointer *) &attrs_end)) { | |
888 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
889 | "__stop___bt_plugin_descriptor_attributes", | |
890 | g_module_name(shared_lib_handle->module)); | |
891 | } | |
892 | ||
893 | if ((!!attrs_begin - !!attrs_end) != 0) { | |
894 | printf_verbose("Found __start___bt_plugin_descriptor_attributes or __stop___bt_plugin_descriptor_attributes symbol, but not both in %s\n", | |
895 | g_module_name(shared_lib_handle->module)); | |
896 | goto end; | |
897 | } | |
898 | ||
899 | if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_component_class_descriptors", | |
900 | (gpointer *) &cc_descriptors_begin)) { | |
901 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
902 | "__start___bt_plugin_component_class_descriptors", | |
903 | g_module_name(shared_lib_handle->module)); | |
904 | } | |
905 | ||
906 | if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_component_class_descriptors", | |
907 | (gpointer *) &cc_descriptors_end)) { | |
908 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
909 | "__stop___bt_plugin_component_class_descriptors", | |
910 | g_module_name(shared_lib_handle->module)); | |
911 | } | |
912 | ||
913 | if ((!!cc_descriptors_begin - !!cc_descriptors_end) != 0) { | |
914 | printf_verbose("Found __start___bt_plugin_component_class_descriptors or __stop___bt_plugin_component_class_descriptors symbol, but not both in %s\n", | |
915 | g_module_name(shared_lib_handle->module)); | |
916 | goto end; | |
917 | } | |
918 | ||
919 | if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_component_class_descriptor_attributes", | |
920 | (gpointer *) &cc_descr_attrs_begin)) { | |
921 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
922 | "__start___bt_plugin_component_class_descriptor_attributes", | |
923 | g_module_name(shared_lib_handle->module)); | |
924 | } | |
925 | ||
926 | if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_component_class_descriptor_attributes", | |
927 | (gpointer *) &cc_descr_attrs_end)) { | |
928 | printf_verbose("Unable to resolve plugin symbol %s from %s\n", | |
929 | "__stop___bt_plugin_component_class_descriptor_attributes", | |
930 | g_module_name(shared_lib_handle->module)); | |
931 | } | |
932 | ||
933 | if ((!!cc_descr_attrs_begin - !!cc_descr_attrs_end) != 0) { | |
934 | printf_verbose("Found __start___bt_plugin_component_class_descriptor_attributes or __stop___bt_plugin_component_class_descriptor_attributes symbol, but not both in %s\n", | |
935 | g_module_name(shared_lib_handle->module)); | |
936 | goto end; | |
937 | } | |
938 | ||
939 | /* Initialize plugin */ | |
a8ff38ef | 940 | plugin_set = bt_plugin_so_create_all_from_sections(shared_lib_handle, |
55bb57e0 PP |
941 | descriptors_begin, descriptors_end, attrs_begin, attrs_end, |
942 | cc_descriptors_begin, cc_descriptors_end, | |
943 | cc_descr_attrs_begin, cc_descr_attrs_end); | |
944 | ||
945 | end: | |
946 | BT_PUT(shared_lib_handle); | |
a8ff38ef | 947 | return plugin_set; |
55bb57e0 PP |
948 | } |
949 | ||
950 | static | |
951 | void plugin_comp_class_destroy_listener(struct bt_component_class *comp_class, | |
952 | void *data) | |
953 | { | |
954 | gboolean exists = g_hash_table_remove(comp_classes_to_shlib_handles, | |
955 | comp_class); | |
956 | assert(exists); | |
957 | } | |
958 | ||
959 | BT_HIDDEN | |
3230ee6b | 960 | void bt_plugin_so_on_add_component_class(struct bt_plugin *plugin, |
55bb57e0 PP |
961 | struct bt_component_class *comp_class) |
962 | { | |
55bb57e0 PP |
963 | struct bt_plugin_so_spec_data *spec = plugin->spec_data; |
964 | ||
965 | assert(plugin->spec_data); | |
966 | assert(plugin->type == BT_PLUGIN_TYPE_SO); | |
967 | ||
968 | /* Map component class pointer to shared lib handle in global HT */ | |
969 | g_hash_table_insert(comp_classes_to_shlib_handles, comp_class, | |
970 | bt_get(spec->shared_lib_handle)); | |
971 | ||
972 | /* Add our custom destroy listener */ | |
3230ee6b | 973 | bt_component_class_add_destroy_listener(comp_class, |
55bb57e0 | 974 | plugin_comp_class_destroy_listener, NULL); |
55bb57e0 | 975 | } |