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3685aed8 | 1 | /* Subclasses of diagnostic_event for analyzer diagnostics. |
a945c346 | 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
3685aed8 DM |
3 | Contributed by David Malcolm <dmalcolm@redhat.com>. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "config.h" | |
22 | #define INCLUDE_MEMORY | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
25 | #include "tree.h" | |
26 | #include "function.h" | |
27 | #include "basic-block.h" | |
28 | #include "gimple.h" | |
29 | #include "diagnostic-core.h" | |
30 | #include "gimple-pretty-print.h" | |
31 | #include "fold-const.h" | |
32 | #include "diagnostic-path.h" | |
33 | #include "options.h" | |
34 | #include "cgraph.h" | |
35 | #include "cfg.h" | |
36 | #include "digraph.h" | |
37 | #include "diagnostic-event-id.h" | |
38 | #include "analyzer/analyzer.h" | |
39 | #include "analyzer/analyzer-logging.h" | |
40 | #include "analyzer/sm.h" | |
41 | #include "sbitmap.h" | |
42 | #include "bitmap.h" | |
43 | #include "ordered-hash-map.h" | |
44 | #include "analyzer/call-string.h" | |
45 | #include "analyzer/program-point.h" | |
46 | #include "analyzer/store.h" | |
47 | #include "analyzer/region-model.h" | |
48 | #include "analyzer/program-state.h" | |
49 | #include "analyzer/checker-path.h" | |
50 | #include "gimple-iterator.h" | |
51 | #include "inlining-iterator.h" | |
52 | #include "analyzer/supergraph.h" | |
53 | #include "analyzer/pending-diagnostic.h" | |
54 | #include "analyzer/diagnostic-manager.h" | |
55 | #include "analyzer/constraint-manager.h" | |
56 | #include "analyzer/checker-event.h" | |
57 | #include "analyzer/exploded-graph.h" | |
58 | ||
59 | #if ENABLE_ANALYZER | |
60 | ||
61 | namespace ana { | |
62 | ||
63 | /* Get a string for EK. */ | |
64 | ||
65 | const char * | |
66 | event_kind_to_string (enum event_kind ek) | |
67 | { | |
68 | switch (ek) | |
69 | { | |
70 | default: | |
71 | gcc_unreachable (); | |
72 | case EK_DEBUG: | |
73 | return "EK_DEBUG"; | |
74 | case EK_CUSTOM: | |
75 | return "EK_CUSTOM"; | |
76 | case EK_STMT: | |
77 | return "EK_STMT"; | |
78 | case EK_REGION_CREATION: | |
79 | return "EK_REGION_CREATION"; | |
80 | case EK_FUNCTION_ENTRY: | |
81 | return "EK_FUNCTION_ENTRY"; | |
82 | case EK_STATE_CHANGE: | |
83 | return "EK_STATE_CHANGE"; | |
84 | case EK_START_CFG_EDGE: | |
85 | return "EK_START_CFG_EDGE"; | |
86 | case EK_END_CFG_EDGE: | |
87 | return "EK_END_CFG_EDGE"; | |
88 | case EK_CALL_EDGE: | |
89 | return "EK_CALL_EDGE"; | |
90 | case EK_RETURN_EDGE: | |
91 | return "EK_RETURN_EDGE"; | |
92 | case EK_START_CONSOLIDATED_CFG_EDGES: | |
93 | return "EK_START_CONSOLIDATED_CFG_EDGES"; | |
94 | case EK_END_CONSOLIDATED_CFG_EDGES: | |
95 | return "EK_END_CONSOLIDATED_CFG_EDGES"; | |
96 | case EK_INLINED_CALL: | |
97 | return "EK_INLINED_CALL"; | |
98 | case EK_SETJMP: | |
99 | return "EK_SETJMP"; | |
100 | case EK_REWIND_FROM_LONGJMP: | |
101 | return "EK_REWIND_FROM_LONGJMP"; | |
102 | case EK_REWIND_TO_SETJMP: | |
103 | return "EK_REWIND_TO_SETJMP"; | |
104 | case EK_WARNING: | |
105 | return "EK_WARNING"; | |
106 | } | |
107 | } | |
108 | ||
109 | /* A class for fixing up fndecls and stack depths in checker_event, based | |
110 | on inlining records. | |
111 | ||
112 | The early inliner runs before the analyzer, which can lead to confusing | |
113 | output. | |
114 | ||
115 | Tne base fndecl and depth within a checker_event are from call strings | |
116 | in program_points, which reflect the call strings after inlining. | |
117 | This class lets us offset the depth and fix up the reported fndecl and | |
118 | stack depth to better reflect the user's original code. */ | |
119 | ||
120 | class inlining_info | |
121 | { | |
122 | public: | |
123 | inlining_info (location_t loc) | |
124 | { | |
125 | inlining_iterator iter (loc); | |
126 | m_inner_fndecl = iter.get_fndecl (); | |
127 | int num_frames = 0; | |
128 | while (!iter.done_p ()) | |
129 | { | |
130 | m_outer_fndecl = iter.get_fndecl (); | |
131 | num_frames++; | |
132 | iter.next (); | |
133 | } | |
134 | if (num_frames > 1) | |
135 | m_extra_frames = num_frames - 1; | |
136 | else | |
137 | m_extra_frames = 0; | |
138 | } | |
139 | ||
140 | tree get_inner_fndecl () const { return m_inner_fndecl; } | |
141 | int get_extra_frames () const { return m_extra_frames; } | |
142 | ||
143 | private: | |
144 | tree m_outer_fndecl; | |
145 | tree m_inner_fndecl; | |
146 | int m_extra_frames; | |
147 | }; | |
148 | ||
149 | /* class checker_event : public diagnostic_event. */ | |
150 | ||
151 | /* checker_event's ctor. */ | |
152 | ||
153 | checker_event::checker_event (enum event_kind kind, | |
e24fe128 DM |
154 | const event_loc_info &loc_info) |
155 | : m_kind (kind), m_loc (loc_info.m_loc), | |
156 | m_original_fndecl (loc_info.m_fndecl), | |
157 | m_effective_fndecl (loc_info.m_fndecl), | |
158 | m_original_depth (loc_info.m_depth), | |
159 | m_effective_depth (loc_info.m_depth), | |
3685aed8 | 160 | m_pending_diagnostic (NULL), m_emission_id (), |
e24fe128 | 161 | m_logical_loc (loc_info.m_fndecl) |
3685aed8 DM |
162 | { |
163 | /* Update effective fndecl and depth if inlining has been recorded. */ | |
164 | if (flag_analyzer_undo_inlining) | |
165 | { | |
e24fe128 | 166 | inlining_info info (m_loc); |
3685aed8 DM |
167 | if (info.get_inner_fndecl ()) |
168 | { | |
169 | m_effective_fndecl = info.get_inner_fndecl (); | |
170 | m_effective_depth += info.get_extra_frames (); | |
171 | m_logical_loc = tree_logical_location (m_effective_fndecl); | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
176 | /* No-op implementation of diagnostic_event::get_meaning vfunc for | |
177 | checker_event: checker events have no meaning by default. */ | |
178 | ||
179 | diagnostic_event::meaning | |
180 | checker_event::get_meaning () const | |
181 | { | |
182 | return meaning (); | |
183 | } | |
184 | ||
185 | /* Dump this event to PP (for debugging/logging purposes). */ | |
186 | ||
187 | void | |
188 | checker_event::dump (pretty_printer *pp) const | |
189 | { | |
190 | label_text event_desc (get_desc (false)); | |
191 | pp_printf (pp, "\"%s\" (depth %i", | |
192 | event_desc.get (), m_effective_depth); | |
193 | ||
194 | if (m_effective_depth != m_original_depth) | |
195 | pp_printf (pp, " corrected from %i", | |
196 | m_original_depth); | |
197 | if (m_effective_fndecl) | |
198 | { | |
199 | pp_printf (pp, ", fndecl %qE", m_effective_fndecl); | |
200 | if (m_effective_fndecl != m_original_fndecl) | |
201 | pp_printf (pp, " corrected from %qE", m_original_fndecl); | |
202 | } | |
203 | pp_printf (pp, ", m_loc=%x)", | |
204 | get_location ()); | |
205 | } | |
206 | ||
207 | /* Dump this event to stderr (for debugging/logging purposes). */ | |
208 | ||
209 | DEBUG_FUNCTION void | |
210 | checker_event::debug () const | |
211 | { | |
212 | pretty_printer pp; | |
213 | pp_format_decoder (&pp) = default_tree_printer; | |
214 | pp_show_color (&pp) = pp_show_color (global_dc->printer); | |
215 | pp.buffer->stream = stderr; | |
216 | dump (&pp); | |
217 | pp_newline (&pp); | |
218 | pp_flush (&pp); | |
219 | } | |
220 | ||
221 | /* Hook for being notified when this event has its final id EMISSION_ID | |
222 | and is about to emitted for PD. | |
223 | ||
224 | Base implementation of checker_event::prepare_for_emission vfunc; | |
225 | subclasses that override this should chain up to it. | |
226 | ||
227 | Record PD and EMISSION_ID, and call the get_desc vfunc, so that any | |
228 | side-effects of the call to get_desc take place before | |
229 | pending_diagnostic::emit is called. | |
230 | ||
231 | For example, state_change_event::get_desc can call | |
232 | pending_diagnostic::describe_state_change; free_of_non_heap can use this | |
233 | to tweak the message (TODO: would be neater to simply capture the | |
234 | pertinent data within the sm-state). */ | |
235 | ||
236 | void | |
237 | checker_event::prepare_for_emission (checker_path *, | |
238 | pending_diagnostic *pd, | |
239 | diagnostic_event_id_t emission_id) | |
240 | { | |
241 | m_pending_diagnostic = pd; | |
242 | m_emission_id = emission_id; | |
243 | ||
244 | label_text desc = get_desc (false); | |
245 | } | |
246 | ||
247 | /* class debug_event : public checker_event. */ | |
248 | ||
249 | /* Implementation of diagnostic_event::get_desc vfunc for | |
250 | debug_event. | |
251 | Use the saved string as the event's description. */ | |
252 | ||
253 | label_text | |
254 | debug_event::get_desc (bool) const | |
255 | { | |
256 | return label_text::borrow (m_desc); | |
257 | } | |
258 | ||
259 | /* class precanned_custom_event : public custom_event. */ | |
260 | ||
261 | /* Implementation of diagnostic_event::get_desc vfunc for | |
262 | precanned_custom_event. | |
263 | Use the saved string as the event's description. */ | |
264 | ||
265 | label_text | |
266 | precanned_custom_event::get_desc (bool) const | |
267 | { | |
268 | return label_text::borrow (m_desc); | |
269 | } | |
270 | ||
271 | /* class statement_event : public checker_event. */ | |
272 | ||
273 | /* statement_event's ctor. */ | |
274 | ||
275 | statement_event::statement_event (const gimple *stmt, tree fndecl, int depth, | |
276 | const program_state &dst_state) | |
e24fe128 DM |
277 | : checker_event (EK_STMT, |
278 | event_loc_info (gimple_location (stmt), fndecl, depth)), | |
3685aed8 DM |
279 | m_stmt (stmt), |
280 | m_dst_state (dst_state) | |
281 | { | |
282 | } | |
283 | ||
284 | /* Implementation of diagnostic_event::get_desc vfunc for | |
285 | statement_event. | |
286 | Use the statement's dump form as the event's description. */ | |
287 | ||
288 | label_text | |
289 | statement_event::get_desc (bool) const | |
290 | { | |
291 | pretty_printer pp; | |
292 | pp_string (&pp, "stmt: "); | |
293 | pp_gimple_stmt_1 (&pp, m_stmt, 0, (dump_flags_t)0); | |
294 | return label_text::take (xstrdup (pp_formatted_text (&pp))); | |
295 | } | |
296 | ||
297 | /* class region_creation_event : public checker_event. */ | |
298 | ||
e24fe128 DM |
299 | region_creation_event::region_creation_event (const event_loc_info &loc_info) |
300 | : checker_event (EK_REGION_CREATION, loc_info) | |
3685aed8 | 301 | { |
3685aed8 DM |
302 | } |
303 | ||
f5758fe5 DM |
304 | /* The various region_creation_event subclasses' get_desc |
305 | implementations. */ | |
3685aed8 DM |
306 | |
307 | label_text | |
f5758fe5 | 308 | region_creation_event_memory_space::get_desc (bool) const |
3685aed8 | 309 | { |
f5758fe5 | 310 | switch (m_mem_space) |
3685aed8 | 311 | { |
f5758fe5 DM |
312 | default: |
313 | return label_text::borrow ("region created here"); | |
314 | case MEMSPACE_STACK: | |
315 | return label_text::borrow ("region created on stack here"); | |
316 | case MEMSPACE_HEAP: | |
317 | return label_text::borrow ("region created on heap here"); | |
3685aed8 | 318 | } |
f5758fe5 | 319 | } |
3685aed8 | 320 | |
f5758fe5 DM |
321 | label_text |
322 | region_creation_event_capacity::get_desc (bool can_colorize) const | |
323 | { | |
324 | gcc_assert (m_capacity); | |
325 | if (TREE_CODE (m_capacity) == INTEGER_CST) | |
3685aed8 | 326 | { |
f5758fe5 DM |
327 | unsigned HOST_WIDE_INT hwi = tree_to_uhwi (m_capacity); |
328 | return make_label_text_n (can_colorize, | |
329 | hwi, | |
330 | "capacity: %wu byte", | |
331 | "capacity: %wu bytes", | |
332 | hwi); | |
333 | } | |
334 | else | |
335 | return make_label_text (can_colorize, | |
336 | "capacity: %qE bytes", m_capacity); | |
337 | } | |
3685aed8 | 338 | |
f5758fe5 DM |
339 | label_text |
340 | region_creation_event_allocation_size::get_desc (bool can_colorize) const | |
341 | { | |
342 | if (m_capacity) | |
343 | { | |
3685aed8 | 344 | if (TREE_CODE (m_capacity) == INTEGER_CST) |
f5758fe5 DM |
345 | return make_label_text_n (can_colorize, |
346 | tree_to_uhwi (m_capacity), | |
347 | "allocated %E byte here", | |
348 | "allocated %E bytes here", | |
349 | m_capacity); | |
3685aed8 DM |
350 | else |
351 | return make_label_text (can_colorize, | |
f5758fe5 DM |
352 | "allocated %qE bytes here", |
353 | m_capacity); | |
3685aed8 | 354 | } |
f5758fe5 DM |
355 | return make_label_text (can_colorize, "allocated here"); |
356 | } | |
357 | ||
358 | label_text | |
359 | region_creation_event_debug::get_desc (bool) const | |
360 | { | |
361 | pretty_printer pp; | |
362 | pp_format_decoder (&pp) = default_tree_printer; | |
363 | pp_string (&pp, "region creation: "); | |
364 | m_reg->dump_to_pp (&pp, true); | |
365 | if (m_capacity) | |
366 | pp_printf (&pp, " capacity: %qE", m_capacity); | |
367 | return label_text::take (xstrdup (pp_formatted_text (&pp))); | |
3685aed8 DM |
368 | } |
369 | ||
370 | /* class function_entry_event : public checker_event. */ | |
371 | ||
372 | function_entry_event::function_entry_event (const program_point &dst_point) | |
373 | : checker_event (EK_FUNCTION_ENTRY, | |
e24fe128 DM |
374 | event_loc_info (dst_point.get_supernode |
375 | ()->get_start_location (), | |
376 | dst_point.get_fndecl (), | |
377 | dst_point.get_stack_depth ())) | |
3685aed8 DM |
378 | { |
379 | } | |
380 | ||
381 | /* Implementation of diagnostic_event::get_desc vfunc for | |
382 | function_entry_event. | |
383 | ||
384 | Use a string such as "entry to 'foo'" as the event's description. */ | |
385 | ||
386 | label_text | |
387 | function_entry_event::get_desc (bool can_colorize) const | |
388 | { | |
389 | return make_label_text (can_colorize, "entry to %qE", m_effective_fndecl); | |
390 | } | |
391 | ||
392 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
393 | function entry. */ | |
394 | ||
395 | diagnostic_event::meaning | |
396 | function_entry_event::get_meaning () const | |
397 | { | |
398 | return meaning (VERB_enter, NOUN_function); | |
399 | } | |
400 | ||
401 | /* class state_change_event : public checker_event. */ | |
402 | ||
403 | /* state_change_event's ctor. */ | |
404 | ||
405 | state_change_event::state_change_event (const supernode *node, | |
406 | const gimple *stmt, | |
407 | int stack_depth, | |
408 | const state_machine &sm, | |
409 | const svalue *sval, | |
410 | state_machine::state_t from, | |
411 | state_machine::state_t to, | |
412 | const svalue *origin, | |
0d6f7b1d DM |
413 | const program_state &dst_state, |
414 | const exploded_node *enode) | |
3685aed8 | 415 | : checker_event (EK_STATE_CHANGE, |
e24fe128 DM |
416 | event_loc_info (stmt->location, |
417 | node->m_fun->decl, | |
418 | stack_depth)), | |
3685aed8 DM |
419 | m_node (node), m_stmt (stmt), m_sm (sm), |
420 | m_sval (sval), m_from (from), m_to (to), | |
421 | m_origin (origin), | |
0d6f7b1d DM |
422 | m_dst_state (dst_state), |
423 | m_enode (enode) | |
3685aed8 DM |
424 | { |
425 | } | |
426 | ||
427 | /* Implementation of diagnostic_event::get_desc vfunc for | |
428 | state_change_event. | |
429 | ||
430 | Attempt to generate a nicer human-readable description. | |
431 | For greatest precision-of-wording, give the pending diagnostic | |
432 | a chance to describe this state change (in terms of the | |
433 | diagnostic). | |
434 | Note that we only have a pending_diagnostic set on the event once | |
435 | the diagnostic is about to being emitted, so the description for | |
436 | an event can change. */ | |
437 | ||
438 | label_text | |
439 | state_change_event::get_desc (bool can_colorize) const | |
440 | { | |
441 | if (m_pending_diagnostic) | |
442 | { | |
443 | region_model *model = m_dst_state.m_region_model; | |
444 | tree var = model->get_representative_tree (m_sval); | |
445 | tree origin = model->get_representative_tree (m_origin); | |
446 | label_text custom_desc | |
447 | = m_pending_diagnostic->describe_state_change | |
448 | (evdesc::state_change (can_colorize, var, origin, | |
449 | m_from, m_to, m_emission_id, *this)); | |
450 | if (custom_desc.get ()) | |
451 | { | |
452 | if (flag_analyzer_verbose_state_changes) | |
453 | { | |
454 | /* Get any "meaning" of event. */ | |
455 | diagnostic_event::meaning meaning = get_meaning (); | |
456 | pretty_printer meaning_pp; | |
457 | meaning.dump_to_pp (&meaning_pp); | |
458 | ||
459 | /* Append debug version. */ | |
460 | if (m_origin) | |
461 | return make_label_text | |
462 | (can_colorize, | |
463 | "%s (state of %qE: %qs -> %qs, origin: %qE, meaning: %s)", | |
464 | custom_desc.get (), | |
465 | var, | |
466 | m_from->get_name (), | |
467 | m_to->get_name (), | |
468 | origin, | |
469 | pp_formatted_text (&meaning_pp)); | |
470 | else | |
471 | return make_label_text | |
472 | (can_colorize, | |
473 | "%s (state of %qE: %qs -> %qs, NULL origin, meaning: %s)", | |
474 | custom_desc.get (), | |
475 | var, | |
476 | m_from->get_name (), | |
477 | m_to->get_name (), | |
478 | pp_formatted_text (&meaning_pp)); | |
479 | } | |
480 | else | |
481 | return custom_desc; | |
482 | } | |
483 | } | |
484 | ||
485 | /* Fallback description. */ | |
486 | if (m_sval) | |
487 | { | |
488 | label_text sval_desc = m_sval->get_desc (); | |
489 | if (m_origin) | |
490 | { | |
491 | label_text origin_desc = m_origin->get_desc (); | |
492 | return make_label_text | |
493 | (can_colorize, | |
494 | "state of %qs: %qs -> %qs (origin: %qs)", | |
495 | sval_desc.get (), | |
496 | m_from->get_name (), | |
497 | m_to->get_name (), | |
498 | origin_desc.get ()); | |
499 | } | |
500 | else | |
501 | return make_label_text | |
502 | (can_colorize, | |
503 | "state of %qs: %qs -> %qs (NULL origin)", | |
504 | sval_desc.get (), | |
505 | m_from->get_name (), | |
506 | m_to->get_name ()); | |
507 | } | |
508 | else | |
509 | { | |
510 | gcc_assert (m_origin == NULL); | |
511 | return make_label_text | |
512 | (can_colorize, | |
513 | "global state: %qs -> %qs", | |
514 | m_from->get_name (), | |
515 | m_to->get_name ()); | |
516 | } | |
517 | } | |
518 | ||
519 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
520 | state change events: delegate to the pending_diagnostic to | |
521 | get any meaning. */ | |
522 | ||
523 | diagnostic_event::meaning | |
524 | state_change_event::get_meaning () const | |
525 | { | |
526 | if (m_pending_diagnostic) | |
527 | { | |
528 | region_model *model = m_dst_state.m_region_model; | |
529 | tree var = model->get_representative_tree (m_sval); | |
530 | tree origin = model->get_representative_tree (m_origin); | |
531 | return m_pending_diagnostic->get_meaning_for_state_change | |
532 | (evdesc::state_change (false, var, origin, | |
533 | m_from, m_to, m_emission_id, *this)); | |
534 | } | |
535 | else | |
536 | return meaning (); | |
537 | } | |
538 | ||
539 | /* class superedge_event : public checker_event. */ | |
540 | ||
541 | /* Get the callgraph_superedge for this superedge_event, which must be | |
542 | for an interprocedural edge, rather than a CFG edge. */ | |
543 | ||
544 | const callgraph_superedge& | |
545 | superedge_event::get_callgraph_superedge () const | |
546 | { | |
547 | gcc_assert (m_sedge->m_kind != SUPEREDGE_CFG_EDGE); | |
548 | return *m_sedge->dyn_cast_callgraph_superedge (); | |
549 | } | |
550 | ||
551 | /* Determine if this event should be filtered at the given verbosity | |
552 | level. */ | |
553 | ||
554 | bool | |
555 | superedge_event::should_filter_p (int verbosity) const | |
556 | { | |
557 | switch (m_sedge->m_kind) | |
558 | { | |
559 | case SUPEREDGE_CFG_EDGE: | |
560 | { | |
561 | if (verbosity < 2) | |
562 | return true; | |
563 | ||
564 | if (verbosity < 4) | |
565 | { | |
566 | /* Filter events with empty descriptions. This ought to filter | |
567 | FALLTHRU, but retain true/false/switch edges. */ | |
568 | label_text desc = get_desc (false); | |
569 | gcc_assert (desc.get ()); | |
570 | if (desc.get ()[0] == '\0') | |
571 | return true; | |
572 | } | |
573 | } | |
574 | break; | |
575 | ||
576 | default: | |
577 | break; | |
578 | } | |
579 | return false; | |
580 | } | |
581 | ||
582 | /* superedge_event's ctor. */ | |
583 | ||
584 | superedge_event::superedge_event (enum event_kind kind, | |
585 | const exploded_edge &eedge, | |
e24fe128 DM |
586 | const event_loc_info &loc_info) |
587 | : checker_event (kind, loc_info), | |
3685aed8 DM |
588 | m_eedge (eedge), m_sedge (eedge.m_sedge), |
589 | m_var (NULL_TREE), m_critical_state (0) | |
590 | { | |
591 | } | |
592 | ||
593 | /* class cfg_edge_event : public superedge_event. */ | |
594 | ||
595 | /* Get the cfg_superedge for this cfg_edge_event. */ | |
596 | ||
597 | const cfg_superedge & | |
598 | cfg_edge_event::get_cfg_superedge () const | |
599 | { | |
600 | return *m_sedge->dyn_cast_cfg_superedge (); | |
601 | } | |
602 | ||
603 | /* cfg_edge_event's ctor. */ | |
604 | ||
605 | cfg_edge_event::cfg_edge_event (enum event_kind kind, | |
606 | const exploded_edge &eedge, | |
e24fe128 DM |
607 | const event_loc_info &loc_info) |
608 | : superedge_event (kind, eedge, loc_info) | |
3685aed8 DM |
609 | { |
610 | gcc_assert (eedge.m_sedge->m_kind == SUPEREDGE_CFG_EDGE); | |
611 | } | |
612 | ||
613 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
614 | CFG edge events. */ | |
615 | ||
616 | diagnostic_event::meaning | |
617 | cfg_edge_event::get_meaning () const | |
618 | { | |
619 | const cfg_superedge& cfg_sedge = get_cfg_superedge (); | |
620 | if (cfg_sedge.true_value_p ()) | |
621 | return meaning (VERB_branch, PROPERTY_true); | |
622 | else if (cfg_sedge.false_value_p ()) | |
623 | return meaning (VERB_branch, PROPERTY_false); | |
624 | else | |
625 | return meaning (); | |
626 | } | |
627 | ||
628 | /* class start_cfg_edge_event : public cfg_edge_event. */ | |
629 | ||
630 | /* Implementation of diagnostic_event::get_desc vfunc for | |
631 | start_cfg_edge_event. | |
632 | ||
633 | If -fanalyzer-verbose-edges, then generate low-level descriptions, such | |
634 | as | |
635 | "taking 'true' edge SN:7 -> SN:8". | |
636 | ||
637 | Otherwise, generate strings using the label of the underlying CFG if | |
638 | any, such as: | |
639 | "following 'true' branch..." or | |
640 | "following 'case 3' branch..." | |
641 | "following 'default' branch..." | |
642 | ||
643 | For conditionals, attempt to supply a description of the condition that | |
644 | holds, such as: | |
645 | "following 'false' branch (when 'ptr' is non-NULL)..." | |
646 | ||
647 | Failing that, return an empty description (which will lead to this event | |
648 | being filtered). */ | |
649 | ||
650 | label_text | |
651 | start_cfg_edge_event::get_desc (bool can_colorize) const | |
652 | { | |
653 | bool user_facing = !flag_analyzer_verbose_edges; | |
654 | label_text edge_desc (m_sedge->get_description (user_facing)); | |
655 | if (user_facing) | |
656 | { | |
657 | if (edge_desc.get () && strlen (edge_desc.get ()) > 0) | |
658 | { | |
659 | label_text cond_desc = maybe_describe_condition (can_colorize); | |
660 | label_text result; | |
661 | if (cond_desc.get ()) | |
662 | return make_label_text (can_colorize, | |
663 | "following %qs branch (%s)...", | |
664 | edge_desc.get (), cond_desc.get ()); | |
665 | else | |
666 | return make_label_text (can_colorize, | |
667 | "following %qs branch...", | |
668 | edge_desc.get ()); | |
669 | } | |
670 | else | |
671 | return label_text::borrow (""); | |
672 | } | |
673 | else | |
674 | { | |
675 | if (strlen (edge_desc.get ()) > 0) | |
676 | return make_label_text (can_colorize, | |
677 | "taking %qs edge SN:%i -> SN:%i", | |
678 | edge_desc.get (), | |
679 | m_sedge->m_src->m_index, | |
680 | m_sedge->m_dest->m_index); | |
681 | else | |
682 | return make_label_text (can_colorize, | |
683 | "taking edge SN:%i -> SN:%i", | |
684 | m_sedge->m_src->m_index, | |
685 | m_sedge->m_dest->m_index); | |
686 | } | |
687 | } | |
688 | ||
689 | /* Attempt to generate a description of any condition that holds at this edge. | |
690 | ||
691 | The intent is to make the user-facing messages more clear, especially for | |
692 | cases where there's a single or double-negative, such as | |
693 | when describing the false branch of an inverted condition. | |
694 | ||
695 | For example, rather than printing just: | |
696 | ||
697 | | if (!ptr) | |
698 | | ~ | |
699 | | | | |
700 | | (1) following 'false' branch... | |
701 | ||
702 | it's clearer to spell out the condition that holds: | |
703 | ||
704 | | if (!ptr) | |
705 | | ~ | |
706 | | | | |
707 | | (1) following 'false' branch (when 'ptr' is non-NULL)... | |
708 | ^^^^^^^^^^^^^^^^^^^^^^ | |
709 | ||
710 | In the above example, this function would generate the highlighted | |
711 | string: "when 'ptr' is non-NULL". | |
712 | ||
713 | If the edge is not a condition, or it's not clear that a description of | |
714 | the condition would be helpful to the user, return NULL. */ | |
715 | ||
716 | label_text | |
717 | start_cfg_edge_event::maybe_describe_condition (bool can_colorize) const | |
718 | { | |
719 | const cfg_superedge& cfg_sedge = get_cfg_superedge (); | |
720 | ||
721 | if (cfg_sedge.true_value_p () || cfg_sedge.false_value_p ()) | |
722 | { | |
723 | const gimple *last_stmt = m_sedge->m_src->get_last_stmt (); | |
724 | if (const gcond *cond_stmt = dyn_cast <const gcond *> (last_stmt)) | |
725 | { | |
726 | enum tree_code op = gimple_cond_code (cond_stmt); | |
727 | tree lhs = gimple_cond_lhs (cond_stmt); | |
728 | tree rhs = gimple_cond_rhs (cond_stmt); | |
729 | if (cfg_sedge.false_value_p ()) | |
730 | op = invert_tree_comparison (op, false /* honor_nans */); | |
731 | return maybe_describe_condition (can_colorize, | |
732 | lhs, op, rhs); | |
733 | } | |
734 | } | |
735 | return label_text::borrow (NULL); | |
736 | } | |
737 | ||
738 | /* Subroutine of maybe_describe_condition above. | |
739 | ||
740 | Attempt to generate a user-facing description of the condition | |
741 | LHS OP RHS, but only if it is likely to make it easier for the | |
742 | user to understand a condition. */ | |
743 | ||
744 | label_text | |
745 | start_cfg_edge_event::maybe_describe_condition (bool can_colorize, | |
746 | tree lhs, | |
747 | enum tree_code op, | |
748 | tree rhs) | |
749 | { | |
750 | /* In theory we could just build a tree via | |
751 | fold_build2 (op, boolean_type_node, lhs, rhs) | |
752 | and print it with %qE on it, but this leads to warts such as | |
753 | parenthesizing vars, such as '(i) <= 9', and uses of '<unknown>'. */ | |
754 | ||
755 | /* Special-case: describe testing the result of strcmp, as figuring | |
756 | out what the "true" or "false" path is can be confusing to the user. */ | |
757 | if (TREE_CODE (lhs) == SSA_NAME | |
758 | && zerop (rhs)) | |
759 | { | |
760 | if (gcall *call = dyn_cast <gcall *> (SSA_NAME_DEF_STMT (lhs))) | |
761 | if (is_special_named_call_p (call, "strcmp", 2)) | |
762 | { | |
763 | if (op == EQ_EXPR) | |
764 | return label_text::borrow ("when the strings are equal"); | |
765 | if (op == NE_EXPR) | |
766 | return label_text::borrow ("when the strings are non-equal"); | |
767 | } | |
768 | } | |
769 | ||
770 | /* Only attempt to generate text for sufficiently simple expressions. */ | |
771 | if (!should_print_expr_p (lhs)) | |
772 | return label_text::borrow (NULL); | |
773 | if (!should_print_expr_p (rhs)) | |
774 | return label_text::borrow (NULL); | |
775 | ||
776 | /* Special cases for pointer comparisons against NULL. */ | |
777 | if (POINTER_TYPE_P (TREE_TYPE (lhs)) | |
778 | && POINTER_TYPE_P (TREE_TYPE (rhs)) | |
779 | && zerop (rhs)) | |
780 | { | |
781 | if (op == EQ_EXPR) | |
782 | return make_label_text (can_colorize, "when %qE is NULL", | |
783 | lhs); | |
784 | if (op == NE_EXPR) | |
785 | return make_label_text (can_colorize, "when %qE is non-NULL", | |
786 | lhs); | |
787 | } | |
788 | ||
789 | return make_label_text (can_colorize, "when %<%E %s %E%>", | |
790 | lhs, op_symbol_code (op), rhs); | |
791 | } | |
792 | ||
793 | /* Subroutine of maybe_describe_condition. | |
794 | ||
795 | Return true if EXPR is we will get suitable user-facing output | |
796 | from %E on it. */ | |
797 | ||
798 | bool | |
799 | start_cfg_edge_event::should_print_expr_p (tree expr) | |
800 | { | |
801 | if (TREE_CODE (expr) == SSA_NAME) | |
802 | { | |
803 | if (SSA_NAME_VAR (expr)) | |
804 | return should_print_expr_p (SSA_NAME_VAR (expr)); | |
805 | else | |
806 | return false; | |
807 | } | |
808 | ||
809 | if (DECL_P (expr)) | |
810 | return true; | |
811 | ||
812 | if (CONSTANT_CLASS_P (expr)) | |
813 | return true; | |
814 | ||
815 | return false; | |
816 | } | |
817 | ||
818 | /* class call_event : public superedge_event. */ | |
819 | ||
820 | /* call_event's ctor. */ | |
821 | ||
822 | call_event::call_event (const exploded_edge &eedge, | |
e24fe128 DM |
823 | const event_loc_info &loc_info) |
824 | : superedge_event (EK_CALL_EDGE, eedge, loc_info) | |
3685aed8 DM |
825 | { |
826 | if (eedge.m_sedge) | |
827 | gcc_assert (eedge.m_sedge->m_kind == SUPEREDGE_CALL); | |
828 | ||
829 | m_src_snode = eedge.m_src->get_supernode (); | |
830 | m_dest_snode = eedge.m_dest->get_supernode (); | |
831 | } | |
832 | ||
833 | /* Implementation of diagnostic_event::get_desc vfunc for | |
834 | call_event. | |
835 | ||
836 | If this call event passes critical state for an sm-based warning, | |
837 | allow the diagnostic to generate a precise description, such as: | |
838 | ||
839 | "passing freed pointer 'ptr' in call to 'foo' from 'bar'" | |
840 | ||
841 | Otherwise, generate a description of the form | |
842 | "calling 'foo' from 'bar'". */ | |
843 | ||
844 | label_text | |
845 | call_event::get_desc (bool can_colorize) const | |
846 | { | |
847 | if (m_critical_state && m_pending_diagnostic) | |
848 | { | |
849 | gcc_assert (m_var); | |
850 | tree var = fixup_tree_for_diagnostic (m_var); | |
851 | label_text custom_desc | |
852 | = m_pending_diagnostic->describe_call_with_state | |
853 | (evdesc::call_with_state (can_colorize, | |
854 | m_src_snode->m_fun->decl, | |
855 | m_dest_snode->m_fun->decl, | |
856 | var, | |
857 | m_critical_state)); | |
858 | if (custom_desc.get ()) | |
859 | return custom_desc; | |
860 | } | |
861 | ||
862 | return make_label_text (can_colorize, | |
863 | "calling %qE from %qE", | |
864 | get_callee_fndecl (), | |
865 | get_caller_fndecl ()); | |
866 | } | |
867 | ||
868 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
869 | function call events. */ | |
870 | ||
871 | diagnostic_event::meaning | |
872 | call_event::get_meaning () const | |
873 | { | |
874 | return meaning (VERB_call, NOUN_function); | |
875 | } | |
876 | ||
877 | /* Override of checker_event::is_call_p for calls. */ | |
878 | ||
879 | bool | |
880 | call_event::is_call_p () const | |
881 | { | |
882 | return true; | |
883 | } | |
884 | ||
885 | tree | |
886 | call_event::get_caller_fndecl () const | |
887 | { | |
888 | return m_src_snode->m_fun->decl; | |
889 | } | |
890 | ||
891 | tree | |
892 | call_event::get_callee_fndecl () const | |
893 | { | |
894 | return m_dest_snode->m_fun->decl; | |
895 | } | |
896 | ||
897 | /* class return_event : public superedge_event. */ | |
898 | ||
899 | /* return_event's ctor. */ | |
900 | ||
901 | return_event::return_event (const exploded_edge &eedge, | |
e24fe128 DM |
902 | const event_loc_info &loc_info) |
903 | : superedge_event (EK_RETURN_EDGE, eedge, loc_info) | |
3685aed8 DM |
904 | { |
905 | if (eedge.m_sedge) | |
906 | gcc_assert (eedge.m_sedge->m_kind == SUPEREDGE_RETURN); | |
907 | ||
908 | m_src_snode = eedge.m_src->get_supernode (); | |
909 | m_dest_snode = eedge.m_dest->get_supernode (); | |
910 | } | |
911 | ||
912 | /* Implementation of diagnostic_event::get_desc vfunc for | |
913 | return_event. | |
914 | ||
915 | If this return event returns critical state for an sm-based warning, | |
916 | allow the diagnostic to generate a precise description, such as: | |
917 | ||
918 | "possible of NULL to 'foo' from 'bar'" | |
919 | ||
920 | Otherwise, generate a description of the form | |
921 | "returning to 'foo' from 'bar'. */ | |
922 | ||
923 | label_text | |
924 | return_event::get_desc (bool can_colorize) const | |
925 | { | |
926 | /* For greatest precision-of-wording, if this is returning the | |
927 | state involved in the pending diagnostic, give the pending | |
928 | diagnostic a chance to describe this return (in terms of | |
929 | itself). */ | |
930 | if (m_critical_state && m_pending_diagnostic) | |
931 | { | |
932 | label_text custom_desc | |
933 | = m_pending_diagnostic->describe_return_of_state | |
934 | (evdesc::return_of_state (can_colorize, | |
935 | m_dest_snode->m_fun->decl, | |
936 | m_src_snode->m_fun->decl, | |
937 | m_critical_state)); | |
938 | if (custom_desc.get ()) | |
939 | return custom_desc; | |
940 | } | |
941 | return make_label_text (can_colorize, | |
942 | "returning to %qE from %qE", | |
943 | m_dest_snode->m_fun->decl, | |
944 | m_src_snode->m_fun->decl); | |
945 | } | |
946 | ||
947 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
948 | function return events. */ | |
949 | ||
950 | diagnostic_event::meaning | |
951 | return_event::get_meaning () const | |
952 | { | |
953 | return meaning (VERB_return, NOUN_function); | |
954 | } | |
955 | ||
956 | /* Override of checker_event::is_return_p for returns. */ | |
957 | ||
958 | bool | |
959 | return_event::is_return_p () const | |
960 | { | |
961 | return true; | |
962 | } | |
963 | ||
964 | /* class start_consolidated_cfg_edges_event : public checker_event. */ | |
965 | ||
966 | label_text | |
967 | start_consolidated_cfg_edges_event::get_desc (bool can_colorize) const | |
968 | { | |
969 | return make_label_text (can_colorize, | |
970 | "following %qs branch...", | |
971 | m_edge_sense ? "true" : "false"); | |
972 | } | |
973 | ||
974 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
975 | start_consolidated_cfg_edges_event. */ | |
976 | ||
977 | diagnostic_event::meaning | |
978 | start_consolidated_cfg_edges_event::get_meaning () const | |
979 | { | |
980 | return meaning (VERB_branch, | |
981 | (m_edge_sense ? PROPERTY_true : PROPERTY_false)); | |
982 | } | |
983 | ||
984 | /* class inlined_call_event : public checker_event. */ | |
985 | ||
986 | label_text | |
987 | inlined_call_event::get_desc (bool can_colorize) const | |
988 | { | |
989 | return make_label_text (can_colorize, | |
990 | "inlined call to %qE from %qE", | |
991 | m_apparent_callee_fndecl, | |
992 | m_apparent_caller_fndecl); | |
993 | } | |
994 | ||
995 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
996 | reconstructed inlined function calls. */ | |
997 | ||
998 | diagnostic_event::meaning | |
999 | inlined_call_event::get_meaning () const | |
1000 | { | |
1001 | return meaning (VERB_call, NOUN_function); | |
1002 | } | |
1003 | ||
1004 | /* class setjmp_event : public checker_event. */ | |
1005 | ||
1006 | /* Implementation of diagnostic_event::get_desc vfunc for | |
1007 | setjmp_event. */ | |
1008 | ||
1009 | label_text | |
1010 | setjmp_event::get_desc (bool can_colorize) const | |
1011 | { | |
1012 | return make_label_text (can_colorize, | |
1013 | "%qs called here", | |
1014 | get_user_facing_name (m_setjmp_call)); | |
1015 | } | |
1016 | ||
1017 | /* Implementation of checker_event::prepare_for_emission vfunc for setjmp_event. | |
1018 | ||
1019 | Record this setjmp's event ID into the path, so that rewind events can | |
1020 | use it. */ | |
1021 | ||
1022 | void | |
1023 | setjmp_event::prepare_for_emission (checker_path *path, | |
1024 | pending_diagnostic *pd, | |
1025 | diagnostic_event_id_t emission_id) | |
1026 | { | |
1027 | checker_event::prepare_for_emission (path, pd, emission_id); | |
1028 | path->record_setjmp_event (m_enode, emission_id); | |
1029 | } | |
1030 | ||
1031 | /* class rewind_event : public checker_event. */ | |
1032 | ||
1033 | /* Get the fndecl containing the site of the longjmp call. */ | |
1034 | ||
1035 | tree | |
1036 | rewind_event::get_longjmp_caller () const | |
1037 | { | |
1038 | return m_eedge->m_src->get_function ()->decl; | |
1039 | } | |
1040 | ||
1041 | /* Get the fndecl containing the site of the setjmp call. */ | |
1042 | ||
1043 | tree | |
1044 | rewind_event::get_setjmp_caller () const | |
1045 | { | |
1046 | return m_eedge->m_dest->get_function ()->decl; | |
1047 | } | |
1048 | ||
1049 | /* rewind_event's ctor. */ | |
1050 | ||
1051 | rewind_event::rewind_event (const exploded_edge *eedge, | |
1052 | enum event_kind kind, | |
e24fe128 | 1053 | const event_loc_info &loc_info, |
3685aed8 | 1054 | const rewind_info_t *rewind_info) |
e24fe128 | 1055 | : checker_event (kind, loc_info), |
3685aed8 DM |
1056 | m_rewind_info (rewind_info), |
1057 | m_eedge (eedge) | |
1058 | { | |
1059 | gcc_assert (m_eedge->m_custom_info.get () == m_rewind_info); | |
1060 | } | |
1061 | ||
1062 | /* class rewind_from_longjmp_event : public rewind_event. */ | |
1063 | ||
1064 | /* Implementation of diagnostic_event::get_desc vfunc for | |
1065 | rewind_from_longjmp_event. */ | |
1066 | ||
1067 | label_text | |
1068 | rewind_from_longjmp_event::get_desc (bool can_colorize) const | |
1069 | { | |
1070 | const char *src_name | |
1071 | = get_user_facing_name (m_rewind_info->get_longjmp_call ()); | |
1072 | ||
1073 | if (get_longjmp_caller () == get_setjmp_caller ()) | |
1074 | /* Special-case: purely intraprocedural rewind. */ | |
1075 | return make_label_text (can_colorize, | |
1076 | "rewinding within %qE from %qs...", | |
1077 | get_longjmp_caller (), | |
1078 | src_name); | |
1079 | else | |
1080 | return make_label_text (can_colorize, | |
1081 | "rewinding from %qs in %qE...", | |
1082 | src_name, | |
1083 | get_longjmp_caller ()); | |
1084 | } | |
1085 | ||
1086 | /* class rewind_to_setjmp_event : public rewind_event. */ | |
1087 | ||
1088 | /* Implementation of diagnostic_event::get_desc vfunc for | |
1089 | rewind_to_setjmp_event. */ | |
1090 | ||
1091 | label_text | |
1092 | rewind_to_setjmp_event::get_desc (bool can_colorize) const | |
1093 | { | |
1094 | const char *dst_name | |
1095 | = get_user_facing_name (m_rewind_info->get_setjmp_call ()); | |
1096 | ||
1097 | /* If we can, identify the ID of the setjmp_event. */ | |
1098 | if (m_original_setjmp_event_id.known_p ()) | |
1099 | { | |
1100 | if (get_longjmp_caller () == get_setjmp_caller ()) | |
1101 | /* Special-case: purely intraprocedural rewind. */ | |
1102 | return make_label_text (can_colorize, | |
1103 | "...to %qs (saved at %@)", | |
1104 | dst_name, | |
1105 | &m_original_setjmp_event_id); | |
1106 | else | |
1107 | return make_label_text (can_colorize, | |
1108 | "...to %qs in %qE (saved at %@)", | |
1109 | dst_name, | |
1110 | get_setjmp_caller (), | |
1111 | &m_original_setjmp_event_id); | |
1112 | } | |
1113 | else | |
1114 | { | |
1115 | if (get_longjmp_caller () == get_setjmp_caller ()) | |
1116 | /* Special-case: purely intraprocedural rewind. */ | |
1117 | return make_label_text (can_colorize, | |
1118 | "...to %qs", | |
1119 | dst_name, | |
1120 | get_setjmp_caller ()); | |
1121 | else | |
1122 | return make_label_text (can_colorize, | |
1123 | "...to %qs in %qE", | |
1124 | dst_name, | |
1125 | get_setjmp_caller ()); | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | /* Implementation of checker_event::prepare_for_emission vfunc for | |
1130 | rewind_to_setjmp_event. | |
1131 | ||
1132 | Attempt to look up the setjmp event ID that recorded the jmp_buf | |
1133 | for this rewind. */ | |
1134 | ||
1135 | void | |
1136 | rewind_to_setjmp_event::prepare_for_emission (checker_path *path, | |
1137 | pending_diagnostic *pd, | |
1138 | diagnostic_event_id_t emission_id) | |
1139 | { | |
1140 | checker_event::prepare_for_emission (path, pd, emission_id); | |
1141 | path->get_setjmp_event (m_rewind_info->get_enode_origin (), | |
1142 | &m_original_setjmp_event_id); | |
1143 | } | |
1144 | ||
1145 | /* class warning_event : public checker_event. */ | |
1146 | ||
1147 | /* Implementation of diagnostic_event::get_desc vfunc for | |
1148 | warning_event. | |
1149 | ||
1150 | If the pending diagnostic implements describe_final_event, use it, | |
1151 | generating a precise description e.g. | |
1152 | "second 'free' here; first 'free' was at (7)" | |
1153 | ||
1154 | Otherwise generate a generic description. */ | |
1155 | ||
1156 | label_text | |
1157 | warning_event::get_desc (bool can_colorize) const | |
1158 | { | |
1159 | if (m_pending_diagnostic) | |
1160 | { | |
1161 | tree var = fixup_tree_for_diagnostic (m_var); | |
1162 | label_text ev_desc | |
1163 | = m_pending_diagnostic->describe_final_event | |
0d6f7b1d | 1164 | (evdesc::final_event (can_colorize, var, m_state, *this)); |
3685aed8 DM |
1165 | if (ev_desc.get ()) |
1166 | { | |
1167 | if (m_sm && flag_analyzer_verbose_state_changes) | |
1168 | { | |
1169 | if (var) | |
1170 | return make_label_text (can_colorize, | |
1171 | "%s (%qE is in state %qs)", | |
1172 | ev_desc.get (), | |
1173 | var, m_state->get_name ()); | |
1174 | else | |
1175 | return make_label_text (can_colorize, | |
1176 | "%s (in global state %qs)", | |
1177 | ev_desc.get (), | |
1178 | m_state->get_name ()); | |
1179 | } | |
1180 | else | |
1181 | return ev_desc; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | if (m_sm) | |
1186 | { | |
1187 | if (m_var) | |
1188 | return make_label_text (can_colorize, | |
1189 | "here (%qE is in state %qs)", | |
1190 | m_var, m_state->get_name ()); | |
1191 | else | |
1192 | return make_label_text (can_colorize, | |
1193 | "here (in global state %qs)", | |
1194 | m_state->get_name ()); | |
1195 | } | |
1196 | else | |
1197 | return label_text::borrow ("here"); | |
1198 | } | |
1199 | ||
1200 | /* Implementation of diagnostic_event::get_meaning vfunc for | |
1201 | warning_event. */ | |
1202 | ||
1203 | diagnostic_event::meaning | |
1204 | warning_event::get_meaning () const | |
1205 | { | |
1206 | return meaning (VERB_danger, NOUN_unknown); | |
1207 | } | |
1208 | ||
1209 | } // namespace ana | |
1210 | ||
1211 | #endif /* #if ENABLE_ANALYZER */ |