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1 | /* Support for GCC plugin mechanism. |
2 | Copyright (C) 2009 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | /* This file contains the support for GCC plugin mechanism based on the | |
21 | APIs described in doc/plugin.texi. */ | |
22 | ||
23 | #include "config.h" | |
24 | #include "system.h" | |
25 | ||
26 | /* If plugin support is not enabled, do not try to execute any code | |
27 | that may reference libdl. The generic code is still compiled in to | |
28 | avoid including to many conditional compilation paths in the rest | |
29 | of the compiler. */ | |
30 | #ifdef ENABLE_PLUGIN | |
31 | #include <dlfcn.h> | |
32 | #endif | |
33 | ||
34 | #include "coretypes.h" | |
35 | #include "toplev.h" | |
36 | #include "tree.h" | |
37 | #include "tree-pass.h" | |
38 | #include "intl.h" | |
39 | #include "plugin.h" | |
40 | #include "timevar.h" | |
41 | ||
42 | /* Event names as strings. Keep in sync with enum plugin_event. */ | |
43 | const char *plugin_event_name[] = | |
44 | { | |
45 | "PLUGIN_PASS_MANAGER_SETUP", | |
46 | "PLUGIN_FINISH_TYPE", | |
47 | "PLUGIN_FINISH_UNIT", | |
48 | "PLUGIN_CXX_CP_PRE_GENERICIZE", | |
49 | "PLUGIN_FINISH", | |
50 | "PLUGIN_EVENT_LAST" | |
51 | }; | |
52 | ||
53 | /* Object that keeps track of the plugin name and its arguments | |
54 | when parsing the command-line options -fplugin=/path/to/NAME.so and | |
55 | -fplugin-arg-NAME-<key>[=<value>]. */ | |
56 | struct plugin_name_args | |
57 | { | |
58 | char *base_name; | |
59 | const char *full_name; | |
60 | int argc; | |
61 | struct plugin_argument *argv; | |
62 | }; | |
63 | ||
64 | /* Hash table for the plugin_name_args objects created during command-line | |
65 | parsing. */ | |
66 | static htab_t plugin_name_args_tab = NULL; | |
67 | ||
68 | /* List node for keeping track of plugin-registered callback. */ | |
69 | struct callback_info | |
70 | { | |
71 | const char *plugin_name; /* Name of plugin that registers the callback. */ | |
72 | plugin_callback_func func; /* Callback to be called. */ | |
73 | void *user_data; /* plugin-specified data. */ | |
74 | struct callback_info *next; | |
75 | }; | |
76 | ||
77 | /* An array of lists of 'callback_info' objects indexed by the event id. */ | |
78 | static struct callback_info *plugin_callbacks[PLUGIN_EVENT_LAST] = { NULL }; | |
79 | ||
80 | /* List node for an inserted pass instance. We need to keep track of all | |
81 | the newly-added pass instances (with 'added_pass_nodes' defined below) | |
82 | so that we can register their dump files after pass-positioning is finished. | |
83 | Registering dumping files needs to be post-processed or the | |
84 | static_pass_number of the opt_pass object would be modified and mess up | |
85 | the dump file names of future pass instances to be added. */ | |
86 | struct pass_list_node | |
87 | { | |
88 | struct opt_pass *pass; | |
89 | struct pass_list_node *next; | |
90 | }; | |
91 | ||
92 | static struct pass_list_node *added_pass_nodes = NULL; | |
93 | static struct pass_list_node *prev_added_pass_node; | |
94 | ||
95 | #ifdef ENABLE_PLUGIN | |
96 | /* Each plugin should define an initialization function with exactly | |
97 | this name. */ | |
98 | static const char *str_plugin_init_func_name = "plugin_init"; | |
99 | #endif | |
100 | ||
101 | /* Helper function for the hash table that compares the base_name of the | |
102 | existing entry (S1) with the given string (S2). */ | |
103 | ||
104 | static int | |
105 | htab_str_eq (const void *s1, const void *s2) | |
106 | { | |
107 | const struct plugin_name_args *plugin = (const struct plugin_name_args *) s1; | |
108 | return !strcmp (plugin->base_name, (const char *) s2); | |
109 | } | |
110 | ||
111 | ||
112 | /* Given a plugin's full-path name FULL_NAME, e.g. /pass/to/NAME.so, | |
113 | return NAME. */ | |
114 | ||
115 | static char * | |
116 | get_plugin_base_name (const char *full_name) | |
117 | { | |
118 | /* First get the base name part of the full-path name, i.e. NAME.so. */ | |
119 | char *base_name = xstrdup (lbasename (full_name)); | |
120 | ||
121 | /* Then get rid of '.so' part of the name. */ | |
122 | strip_off_ending (base_name, strlen (base_name)); | |
123 | ||
124 | return base_name; | |
125 | } | |
126 | ||
127 | ||
128 | /* Create a plugin_name_args object for the give plugin and insert it to | |
129 | the hash table. This function is called when -fplugin=/path/to/NAME.so | |
130 | option is processed. */ | |
131 | ||
132 | void | |
133 | add_new_plugin (const char* plugin_name) | |
134 | { | |
135 | struct plugin_name_args *plugin; | |
136 | void **slot; | |
137 | char *base_name = get_plugin_base_name (plugin_name); | |
138 | ||
139 | /* If this is the first -fplugin= option we encounter, create | |
140 | 'plugin_name_args_tab' hash table. */ | |
141 | if (!plugin_name_args_tab) | |
142 | plugin_name_args_tab = htab_create (10, htab_hash_string, htab_str_eq, | |
143 | NULL); | |
144 | ||
145 | slot = htab_find_slot (plugin_name_args_tab, base_name, INSERT); | |
146 | ||
147 | /* If the same plugin (name) has been specified earlier, either emit an | |
148 | error or a warning message depending on if they have identical full | |
149 | (path) names. */ | |
150 | if (*slot) | |
151 | { | |
152 | plugin = (struct plugin_name_args *) *slot; | |
153 | if (strcmp (plugin->full_name, plugin_name)) | |
154 | error ("Plugin %s was specified with different paths:\n%s\n%s", | |
155 | plugin->base_name, plugin->full_name, plugin_name); | |
156 | return; | |
157 | } | |
158 | ||
159 | plugin = XCNEW (struct plugin_name_args); | |
160 | plugin->base_name = base_name; | |
161 | plugin->full_name = plugin_name; | |
162 | ||
163 | *slot = plugin; | |
164 | } | |
165 | ||
166 | ||
167 | /* Parse the -fplugin-arg-<name>-<key>[=<value>] option and create a | |
168 | 'plugin_argument' object for the parsed key-value pair. ARG is | |
169 | the <name>-<key>[=<value>] part of the option. */ | |
170 | ||
171 | void | |
172 | parse_plugin_arg_opt (const char *arg) | |
173 | { | |
174 | size_t len = 0, name_len = 0, key_len = 0, value_len = 0; | |
175 | const char *ptr, *name_start = arg, *key_start = NULL, *value_start = NULL; | |
176 | char *name, *key, *value; | |
177 | void **slot; | |
178 | bool name_parsed = false, key_parsed = false; | |
179 | ||
180 | /* Iterate over the ARG string and identify the starting character position | |
181 | of 'name', 'key', and 'value' and their lengths. */ | |
182 | for (ptr = arg; *ptr; ++ptr) | |
183 | { | |
184 | /* Only the first '-' encountered is considered a separator between | |
185 | 'name' and 'key'. All the subsequent '-'s are considered part of | |
186 | 'key'. For example, given -fplugin-arg-foo-bar-primary-key=value, | |
187 | the plugin name is 'foo' and the key is 'bar-primary-key'. */ | |
188 | if (*ptr == '-' && !name_parsed) | |
189 | { | |
190 | name_len = len; | |
191 | len = 0; | |
192 | key_start = ptr + 1; | |
193 | name_parsed = true; | |
194 | continue; | |
195 | } | |
196 | else if (*ptr == '=') | |
197 | { | |
198 | if (key_parsed) | |
199 | { | |
200 | error ("Malformed option -fplugin-arg-%s (multiple '=' signs)", | |
201 | arg); | |
202 | return; | |
203 | } | |
204 | key_len = len; | |
205 | len = 0; | |
206 | value_start = ptr + 1; | |
207 | key_parsed = true; | |
208 | continue; | |
209 | } | |
210 | else | |
211 | ++len; | |
212 | } | |
213 | ||
214 | if (!key_start) | |
215 | { | |
216 | error ("Malformed option -fplugin-arg-%s (missing -<key>[=<value>])", | |
217 | arg); | |
218 | return; | |
219 | } | |
220 | ||
221 | /* If the option doesn't contain the 'value' part, LEN is the KEY_LEN. | |
222 | Otherwise, it is the VALUE_LEN. */ | |
223 | if (!value_start) | |
224 | key_len = len; | |
225 | else | |
226 | value_len = len; | |
227 | ||
228 | name = XNEWVEC (char, name_len + 1); | |
229 | strncpy (name, name_start, name_len); | |
230 | name[name_len] = '\0'; | |
231 | ||
232 | /* Check if the named plugin has already been specified earlier in the | |
233 | command-line. */ | |
234 | if (plugin_name_args_tab | |
235 | && ((slot = htab_find_slot (plugin_name_args_tab, name, NO_INSERT)) | |
236 | != NULL)) | |
237 | { | |
238 | struct plugin_name_args *plugin = (struct plugin_name_args *) *slot; | |
239 | ||
240 | key = XNEWVEC (char, key_len + 1); | |
241 | strncpy (key, key_start, key_len); | |
242 | key[key_len] = '\0'; | |
243 | if (value_start) | |
244 | { | |
245 | value = XNEWVEC (char, value_len + 1); | |
246 | strncpy (value, value_start, value_len); | |
247 | value[value_len] = '\0'; | |
248 | } | |
249 | else | |
250 | value = NULL; | |
251 | ||
252 | /* Create a plugin_argument object for the parsed key-value pair. | |
253 | If there are already arguments for this plugin, we will need to | |
254 | adjust the argument array size by creating a new array and deleting | |
255 | the old one. If the performance ever becomes an issue, we can | |
256 | change the code by pre-allocating a larger array first. */ | |
257 | if (plugin->argc > 0) | |
258 | { | |
259 | struct plugin_argument *args = XNEWVEC (struct plugin_argument, | |
260 | plugin->argc + 1); | |
261 | memcpy (args, plugin->argv, | |
262 | sizeof (struct plugin_argument) * plugin->argc); | |
263 | XDELETEVEC (plugin->argv); | |
264 | plugin->argv = args; | |
265 | ++plugin->argc; | |
266 | } | |
267 | else | |
268 | { | |
269 | gcc_assert (plugin->argv == NULL); | |
270 | plugin->argv = XNEWVEC (struct plugin_argument, 1); | |
271 | plugin->argc = 1; | |
272 | } | |
273 | ||
274 | plugin->argv[plugin->argc - 1].key = key; | |
275 | plugin->argv[plugin->argc - 1].value = value; | |
276 | } | |
277 | else | |
278 | error ("Plugin %s should be specified before -fplugin-arg-%s " | |
279 | "in the command line", name, arg); | |
280 | ||
281 | /* We don't need the plugin's name anymore. Just release it. */ | |
282 | XDELETEVEC (name); | |
283 | } | |
284 | ||
285 | ||
286 | /* Insert the plugin pass at the proper position. Return true if the pass | |
287 | is successfully added. | |
288 | ||
289 | PLUGIN_PASS_INFO - new pass to be inserted | |
290 | PASS_LIST - root of the pass list to insert the new pass to */ | |
291 | ||
292 | static bool | |
293 | position_pass (struct plugin_pass *plugin_pass_info, | |
294 | struct opt_pass **pass_list) | |
295 | { | |
296 | struct opt_pass *pass = *pass_list, *prev_pass = NULL; | |
297 | bool success = false; | |
298 | ||
299 | for ( ; pass; prev_pass = pass, pass = pass->next) | |
300 | { | |
301 | /* Check if the current pass is of the same type as the new pass and | |
302 | matches the name and the instance number of the reference pass. */ | |
303 | if (pass->type == plugin_pass_info->pass->type | |
304 | && pass->name | |
305 | && !strcmp (pass->name, plugin_pass_info->reference_pass_name) | |
306 | && ((plugin_pass_info->ref_pass_instance_number == 0) | |
307 | || (plugin_pass_info->ref_pass_instance_number == | |
308 | pass->static_pass_number) | |
309 | || (plugin_pass_info->ref_pass_instance_number == 1 | |
310 | && pass->todo_flags_start & TODO_mark_first_instance))) | |
311 | { | |
312 | struct opt_pass *new_pass = plugin_pass_info->pass; | |
313 | struct pass_list_node *new_pass_node; | |
314 | ||
315 | /* The following code (if-statement) is adopted from next_pass_1. */ | |
316 | if (new_pass->static_pass_number) | |
317 | { | |
318 | new_pass = XNEW (struct opt_pass); | |
319 | memcpy (new_pass, plugin_pass_info->pass, sizeof (*new_pass)); | |
320 | new_pass->next = NULL; | |
321 | ||
322 | new_pass->todo_flags_start &= ~TODO_mark_first_instance; | |
323 | ||
324 | plugin_pass_info->pass->static_pass_number -= 1; | |
325 | new_pass->static_pass_number = | |
326 | -plugin_pass_info->pass->static_pass_number; | |
327 | } | |
328 | else | |
329 | { | |
330 | new_pass->todo_flags_start |= TODO_mark_first_instance; | |
331 | new_pass->static_pass_number = -1; | |
332 | } | |
333 | ||
334 | /* Insert the new pass instance based on the positioning op. */ | |
335 | switch (plugin_pass_info->pos_op) | |
336 | { | |
337 | case PASS_POS_INSERT_AFTER: | |
338 | new_pass->next = pass->next; | |
339 | pass->next = new_pass; | |
340 | break; | |
341 | case PASS_POS_INSERT_BEFORE: | |
342 | new_pass->next = pass; | |
343 | if (prev_pass) | |
344 | prev_pass->next = new_pass; | |
345 | else | |
346 | *pass_list = new_pass; | |
347 | break; | |
348 | case PASS_POS_REPLACE: | |
349 | new_pass->next = pass->next; | |
350 | if (prev_pass) | |
351 | prev_pass->next = new_pass; | |
352 | else | |
353 | *pass_list = new_pass; | |
354 | new_pass->sub = pass->sub; | |
355 | new_pass->tv_id = pass->tv_id; | |
356 | pass = new_pass; | |
357 | break; | |
358 | default: | |
359 | error ("Invalid pass positioning operation"); | |
360 | return false; | |
361 | } | |
362 | ||
363 | /* Save the newly added pass (instance) in the added_pass_nodes | |
364 | list so that we can register its dump file later. Note that | |
365 | we cannot register the dump file now because doing so will modify | |
366 | the static_pass_number of the opt_pass object and therefore | |
367 | mess up the dump file name of future instances. */ | |
368 | new_pass_node = XCNEW (struct pass_list_node); | |
369 | new_pass_node->pass = new_pass; | |
370 | if (!added_pass_nodes) | |
371 | added_pass_nodes = new_pass_node; | |
372 | else | |
373 | prev_added_pass_node->next = new_pass_node; | |
374 | prev_added_pass_node = new_pass_node; | |
375 | ||
376 | success = true; | |
377 | } | |
378 | ||
379 | if (pass->sub && position_pass (plugin_pass_info, &pass->sub)) | |
380 | success = true; | |
381 | } | |
382 | ||
383 | return success; | |
384 | } | |
385 | ||
386 | ||
387 | /* Hook into the pass lists (trees) a new pass registered by a plugin. | |
388 | ||
389 | PLUGIN_NAME - display name for the plugin | |
390 | PASS_INFO - plugin pass information that specifies the opt_pass object, | |
391 | reference pass, instance number, and how to position | |
392 | the pass */ | |
393 | ||
394 | static void | |
395 | register_pass (const char *plugin_name, struct plugin_pass *pass_info) | |
396 | { | |
397 | if (!pass_info->pass) | |
398 | { | |
399 | error ("No pass specified when registering a new pass in plugin %s", | |
400 | plugin_name); | |
401 | return; | |
402 | } | |
403 | ||
404 | if (!pass_info->reference_pass_name) | |
405 | { | |
406 | error ("No reference pass specified for positioning the pass " | |
407 | " from plugin %s", plugin_name); | |
408 | return; | |
409 | } | |
410 | ||
411 | /* Try to insert the new pass to the pass lists. We need to check all | |
412 | three lists as the reference pass could be in one (or all) of them. */ | |
413 | if (!position_pass (pass_info, &all_lowering_passes) | |
414 | && !position_pass (pass_info, &all_ipa_passes) | |
415 | && !position_pass (pass_info, &all_passes)) | |
416 | error ("Failed to position pass %s registered by plugin %s. " | |
417 | "Cannot find the (specified instance of) reference pass %s", | |
418 | pass_info->pass->name, plugin_name, pass_info->reference_pass_name); | |
419 | else | |
420 | { | |
421 | /* OK, we have successfully inserted the new pass. We need to register | |
422 | the dump files for the newly added pass and its duplicates (if any). | |
423 | Because the registration of plugin passes happens after the | |
424 | command-line options are parsed, the options that specify single | |
425 | pass dumping (e.g. -fdump-tree-PASSNAME) cannot be used for new | |
426 | plugin passes. Therefore we currently can only enable dumping of | |
427 | new plugin passes when the 'dump-all' flags (e.g. -fdump-tree-all) | |
428 | are specified. While doing so, we also delete the pass_list_node | |
429 | objects created during pass positioning. */ | |
430 | while (added_pass_nodes) | |
431 | { | |
432 | struct pass_list_node *next_node = added_pass_nodes->next; | |
433 | enum tree_dump_index tdi; | |
434 | register_one_dump_file (added_pass_nodes->pass); | |
435 | if (added_pass_nodes->pass->type == SIMPLE_IPA_PASS | |
436 | || added_pass_nodes->pass->type == IPA_PASS) | |
437 | tdi = TDI_ipa_all; | |
438 | else if (added_pass_nodes->pass->type == GIMPLE_PASS) | |
439 | tdi = TDI_tree_all; | |
440 | else | |
441 | tdi = TDI_rtl_all; | |
442 | /* Check if dump-all flag is specified. */ | |
443 | if (get_dump_file_info (tdi)->state) | |
444 | get_dump_file_info (added_pass_nodes->pass->static_pass_number) | |
445 | ->state = get_dump_file_info (tdi)->state; | |
446 | XDELETE (added_pass_nodes); | |
447 | added_pass_nodes = next_node; | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | ||
453 | /* Called from the plugin's initialization code. Register a single callback. | |
454 | This function can be called multiple times. | |
455 | ||
456 | PLUGIN_NAME - display name for this plugin | |
457 | EVENT - which event the callback is for | |
458 | CALLBACK - the callback to be called at the event | |
459 | USER_DATA - plugin-provided data */ | |
460 | ||
461 | void | |
462 | register_callback (const char *plugin_name, | |
463 | enum plugin_event event, | |
464 | plugin_callback_func callback, | |
465 | void *user_data) | |
466 | { | |
467 | switch (event) | |
468 | { | |
469 | case PLUGIN_PASS_MANAGER_SETUP: | |
470 | register_pass (plugin_name, (struct plugin_pass *) user_data); | |
471 | break; | |
472 | case PLUGIN_FINISH_TYPE: | |
473 | case PLUGIN_FINISH_UNIT: | |
474 | case PLUGIN_CXX_CP_PRE_GENERICIZE: | |
475 | case PLUGIN_FINISH: | |
476 | { | |
477 | struct callback_info *new_callback; | |
478 | if (!callback) | |
479 | { | |
480 | error ("Plugin %s registered a null callback function " | |
481 | "for event %s", plugin_name, plugin_event_name[event]); | |
482 | return; | |
483 | } | |
484 | new_callback = XNEW (struct callback_info); | |
485 | new_callback->plugin_name = plugin_name; | |
486 | new_callback->func = callback; | |
487 | new_callback->user_data = user_data; | |
488 | new_callback->next = plugin_callbacks[event]; | |
489 | plugin_callbacks[event] = new_callback; | |
490 | } | |
491 | break; | |
492 | case PLUGIN_EVENT_LAST: | |
493 | default: | |
494 | error ("Unkown callback event registered by plugin %s", | |
495 | plugin_name); | |
496 | } | |
497 | } | |
498 | ||
499 | ||
500 | /* Called from inside GCC. Invoke all plug-in callbacks registered with | |
501 | the specified event. | |
502 | ||
503 | EVENT - the event identifier | |
504 | GCC_DATA - event-specific data provided by the compiler */ | |
505 | ||
506 | void | |
507 | invoke_plugin_callbacks (enum plugin_event event, void *gcc_data) | |
508 | { | |
509 | timevar_push (TV_PLUGIN_RUN); | |
510 | ||
511 | switch (event) | |
512 | { | |
513 | case PLUGIN_FINISH_TYPE: | |
514 | case PLUGIN_FINISH_UNIT: | |
515 | case PLUGIN_CXX_CP_PRE_GENERICIZE: | |
516 | case PLUGIN_FINISH: | |
517 | { | |
518 | /* Iterate over every callback registered with this event and | |
519 | call it. */ | |
520 | struct callback_info *callback = plugin_callbacks[event]; | |
521 | for ( ; callback; callback = callback->next) | |
522 | (*callback->func) (gcc_data, callback->user_data); | |
523 | } | |
524 | break; | |
525 | ||
526 | case PLUGIN_PASS_MANAGER_SETUP: | |
527 | case PLUGIN_EVENT_LAST: | |
528 | default: | |
529 | gcc_assert (false); | |
530 | } | |
531 | ||
532 | timevar_pop (TV_PLUGIN_RUN); | |
533 | } | |
534 | ||
535 | #ifdef ENABLE_PLUGIN | |
536 | /* We need a union to cast dlsym return value to a function pointer | |
537 | as ISO C forbids assignment between function pointer and 'void *'. | |
538 | Use explicit union instead of __extension__(<union_cast>) for | |
539 | portability. */ | |
540 | #define PTR_UNION_TYPE(TOTYPE) union { void *_q; TOTYPE _nq; } | |
541 | #define PTR_UNION_AS_VOID_PTR(NAME) (NAME._q) | |
542 | #define PTR_UNION_AS_CAST_PTR(NAME) (NAME._nq) | |
543 | ||
544 | /* Routine to dlopen and initialize one plugin. This function is passed to | |
545 | (and called by) the hash table traverse routine. Return 1 for the | |
546 | htab_traverse to continue scan, 0 to stop. | |
547 | ||
548 | SLOT - slot of the hash table element | |
549 | INFO - auxiliary pointer handed to hash table traverse routine | |
550 | (unused in this function) */ | |
551 | ||
552 | static int | |
553 | init_one_plugin (void **slot, void * ARG_UNUSED (info)) | |
554 | { | |
555 | struct plugin_name_args *plugin = (struct plugin_name_args *) *slot; | |
556 | void *dl_handle; | |
557 | plugin_init_func plugin_init; | |
558 | char *err; | |
559 | PTR_UNION_TYPE (plugin_init_func) plugin_init_union; | |
560 | ||
561 | dl_handle = dlopen (plugin->full_name, RTLD_NOW); | |
562 | if (!dl_handle) | |
563 | { | |
564 | error ("Cannot load plugin %s\n%s", plugin->full_name, dlerror ()); | |
565 | return 1; | |
566 | } | |
567 | ||
568 | /* Clear any existing error. */ | |
569 | dlerror (); | |
570 | ||
571 | PTR_UNION_AS_VOID_PTR (plugin_init_union) = | |
572 | dlsym (dl_handle, str_plugin_init_func_name); | |
573 | plugin_init = PTR_UNION_AS_CAST_PTR (plugin_init_union); | |
574 | ||
575 | if ((err = dlerror ()) != NULL) | |
576 | { | |
577 | error ("Cannot find %s in plugin %s\n%s", str_plugin_init_func_name, | |
578 | plugin->full_name, err); | |
579 | return 1; | |
580 | } | |
581 | ||
582 | /* Call the plugin-provided initialization routine with the arguments. */ | |
583 | if ((*plugin_init) (plugin->base_name, plugin->argc, plugin->argv)) | |
584 | { | |
585 | error ("Fail to initialize plugin %s", plugin->full_name); | |
586 | return 1; | |
587 | } | |
588 | ||
589 | /* We can now delete the plugin_name_args object as it will no longer | |
590 | be used. Note that base_name and argv fields (both of which were also | |
591 | dynamically allocated) are not freed as they could still be used by | |
592 | the plugin code. */ | |
593 | XDELETE (plugin); | |
594 | ||
595 | return 1; | |
596 | } | |
597 | #endif /* ENABLE_PLUGIN */ | |
598 | ||
599 | /* Main plugin initialization function. Called from compile_file() in | |
600 | toplev.c. */ | |
601 | ||
602 | void | |
603 | initialize_plugins (void) | |
604 | { | |
605 | /* If no plugin was specified in the command-line, simply return. */ | |
606 | if (!plugin_name_args_tab) | |
607 | return; | |
608 | ||
609 | timevar_push (TV_PLUGIN_INIT); | |
610 | ||
611 | #ifdef ENABLE_PLUGIN | |
612 | /* Traverse and initialize each plugin specified in the command-line. */ | |
613 | htab_traverse_noresize (plugin_name_args_tab, init_one_plugin, NULL); | |
614 | #endif | |
615 | ||
616 | /* PLUGIN_NAME_ARGS_TAB is no longer needed, just delete it. */ | |
617 | htab_delete (plugin_name_args_tab); | |
618 | plugin_name_args_tab = NULL; | |
619 | ||
620 | timevar_pop (TV_PLUGIN_INIT); | |
621 | } | |
622 | ||
623 | ||
624 | /* Return true if plugins have been loaded. */ | |
625 | ||
626 | bool | |
627 | plugins_active_p (void) | |
628 | { | |
629 | enum plugin_event event; | |
630 | ||
631 | for (event = PLUGIN_PASS_MANAGER_SETUP; event < PLUGIN_EVENT_LAST; event++) | |
632 | if (plugin_callbacks[event]) | |
633 | return true; | |
634 | ||
635 | return false; | |
636 | } | |
637 | ||
638 | ||
639 | /* Dump to FILE the names and associated events for all the active | |
640 | plugins. */ | |
641 | ||
642 | void | |
643 | dump_active_plugins (FILE *file) | |
644 | { | |
645 | enum plugin_event event; | |
646 | ||
647 | if (!plugins_active_p ()) | |
648 | return; | |
649 | ||
dab71827 | 650 | fprintf (stderr, "Event\t\t\tPlugins\n"); |
68a607d8 DN |
651 | for (event = PLUGIN_PASS_MANAGER_SETUP; event < PLUGIN_EVENT_LAST; event++) |
652 | if (plugin_callbacks[event]) | |
653 | { | |
654 | struct callback_info *ci; | |
655 | ||
656 | fprintf (file, "%s\t", plugin_event_name[event]); | |
657 | ||
658 | for (ci = plugin_callbacks[event]; ci; ci = ci->next) | |
659 | fprintf (file, "%s ", ci->plugin_name); | |
660 | ||
661 | fprintf (file, "\n"); | |
662 | } | |
663 | } | |
664 | ||
665 | ||
666 | /* Dump active plugins to stderr. */ | |
667 | ||
668 | void | |
669 | debug_active_plugins (void) | |
670 | { | |
671 | dump_active_plugins (stderr); | |
672 | } |