summaryrefslogtreecommitdiff
path: root/lisp/cedet/semantic/analyze/debug.el
blob: 03979f5216411706ae21f3a59f376ecd29bf0ffb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
;;; semantic/analyze/debug.el --- Debug the analyzer

;;; Copyright (C) 2008-2016 Free Software Foundation, Inc.

;; Author: Eric M. Ludlam <zappo@gnu.org>

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:
;;
;; Provide a top-order debugging tool for figuring out what's going on with
;; smart completion and analyzer mode.

(require 'semantic)
(require 'semantic/analyze)
(require 'semantic/analyze/complete)
(require 'semantic/db-typecache)

;; For semantic-find-tags-by-class:
(eval-when-compile (require 'semantic/find))

(declare-function ede-get-locator-object "ede/files")

;;; Code:

(defun semantic-analyze-debug-assist ()
  "Debug semantic analysis at the current point."
  (interactive)
  (let ((actualfcn (fetch-overload 'semantic-analyze-current-context))
	(ctxt (semantic-analyze-current-context))
	)
    ;; What to show.
    (if actualfcn
	(message "Mode %s does not use the default analyzer."
		 major-mode)
      ;; Debug our context.
      )
    (or (semantic-analyzer-debug-test-local-context)
	(and ctxt (semantic-analyzer-debug-found-prefix ctxt))
	)

    ))

;; @TODO - If this happens, but the last found type is
;; a datatype, then the below is wrong
(defun semantic-analyzer-debug-found-prefix (ctxt)
  "Debug the prefix found by the analyzer output CTXT."
  (let* ((pf (oref ctxt prefix))
	 (pft (oref ctxt prefixtypes))
	 (idx 0)
	 (stop nil)
	 (comp (condition-case nil
		   (semantic-analyze-possible-completions ctxt)
		 (error nil)))
	 )
    (while (and (nth idx pf) (not stop))
      (let ((pentry (nth idx pf))
	    (ptentry (nth idx pft)))
	(if (or (stringp pentry) (not ptentry))
	    ;; Found something ok.  Stop.
	    (setq stop t)
	  (setq idx (1+ idx)))))
    ;; We found the first non-tag entry.  What is the situation?
    (cond
     ((and (eq idx 0) (stringp (car pf)))
      ;; First part, we couldn't find it.
      (semantic-analyzer-debug-global-symbol ctxt (car pf) comp))
     ((not (nth (1- idx) pft)) ;; idx can't be 0 here.
      ;; The previous entry failed to have an identifiable data
      ;; type, which is a global search.
      (semantic-analyzer-debug-missing-datatype ctxt idx comp))
     ((and (nth (1- idx) pft) (stringp (nth idx pf)))
      ;; Non-first search, didn't find string in known data type.
      (semantic-analyzer-debug-missing-innertype ctxt idx comp))
     (t
      ;; Things are ok?
      (message "Things look ok."))
    )))

(defun semantic-analyzer-debug-global-symbol (ctxt prefix comp)
  "Debug why we can't find the first entry in the CTXT PREFIX.
Argument COMP are possible completions here."
  (let ((tab semanticdb-current-table)
	(finderr nil)
	(origbuf (current-buffer))
	)
    (with-output-to-temp-buffer (help-buffer)
      (with-current-buffer standard-output
	(princ "Unable to find symbol ")
	(princ prefix)
	(princ ".\n\n")

	;; NOTE: This line is copied from semantic-analyze-current-context.
	;;       You will need to update both places.
	(condition-case err
	    (with-current-buffer origbuf
	      (let* ((position (or (cdr-safe (oref ctxt bounds)) (point)))
		     (prefixtypes nil) ; Used as type return
		     (scope (semantic-calculate-scope position))
		     )
		(semantic-analyze-find-tag-sequence
		 (list prefix "") scope 'prefixtypes)
		)
	      )
	  (error (setq finderr err)))

	(if finderr
	    (progn
	      (princ "The prefix lookup code threw the following error:\n  ")
	      (prin1 finderr)
	      (princ "\n\nTo debug this error you can do this:
  M-x toggle-debug-on-error RET
and then re-run the debug analyzer.\n")
	      )
	  ;; No find error, just not found
	  (princ "The prefix ")
	  (princ prefix)
	  (princ " could not be found in the local scope,
nor in any search tables.\n")
	  )
	(princ "\n")

	;; Describe local scope, and why we might not be able to
	;; find it.
	(semantic-analyzer-debug-describe-scope ctxt)

	(semantic-analyzer-debug-show-completions comp)

	(princ "When Semantic cannot find a symbol, it could be because the include
path was setup incorrectly.\n")

	(semantic-analyzer-debug-insert-include-summary tab)

	))
    (semantic-analyzer-debug-add-buttons)
    ))

(defun semantic-analyzer-debug-missing-datatype (ctxt idx comp)
  "Debug why we can't find a datatype entry for CTXT prefix at IDX.
Argument COMP are possible completions here."
  (let* ((prefixitem (nth idx (oref ctxt prefix)))
	 (dt (nth (1- idx) (oref ctxt prefixtypes)))
	 (tt (semantic-tag-type prefixitem))
	 (tab semanticdb-current-table)
	 )
    (when dt (error "Missing Datatype debugger is confused"))
    (with-output-to-temp-buffer (help-buffer)
      (with-current-buffer standard-output
	(princ "Unable to find datatype for: \"")
	(princ (semantic-format-tag-prototype prefixitem))
	(princ "\".
Declared type is: ")
	(when (semantic-tag-p tt)
	  (semantic-analyzer-debug-insert-tag tt)
	  (princ "\nRaw data type is: "))
	(princ (format "%S" tt))
	(princ "

Semantic could not find this data type in any of its global tables.

Semantic locates datatypes through either the local scope, or the global
typecache.
")

	;; Describe local scope, and why we might not be able to
	;; find it.
	(semantic-analyzer-debug-describe-scope ctxt '(type))

	;; Describe the typecache.
	(princ "\nSemantic creates and maintains a type cache for each buffer.
If the type is a global type, then it should appear in they typecache.
To examine the typecache, type:

  M-x semanticdb-typecache-dump RET

Current typecache Statistics:\n")
	(princ (format "   %4d types global in this file\n   %4d types from includes.\n"
		       (length (semanticdb-typecache-file-tags tab))
		       (length (semanticdb-typecache-include-tags tab))))

	(princ "\nIf the datatype is not in the typecache, then your include
path may be incorrect.  ")

	(semantic-analyzer-debug-insert-include-summary tab)

	;; End with-buffer
	))
    (semantic-analyzer-debug-add-buttons)
    ))

(defun semantic-analyzer-debug-missing-innertype (ctxt idx comp)
  "Debug why we can't find an entry for CTXT prefix at IDX for known type.
We need to see if we have possible completions against the entry before
being too vocal about it.
Argument COMP are possible completions here."
  (let* ((prefixitem (nth idx (oref ctxt prefix)))
	 (prevprefix (nth (1- idx) (oref ctxt prefix)))
	 (dt (nth (1- idx) (oref ctxt prefixtypes)))
	 (desired-type (semantic-analyze-type-constraint ctxt))
	 (orig-buffer (current-buffer))
	 (ots (semantic-analyze-tag-type prevprefix
					 (oref ctxt scope)
					 t ; Don't deref
					 ))
	 )
    (when (not dt) (error "Missing Innertype debugger is confused"))
    (with-output-to-temp-buffer (help-buffer)
      (with-current-buffer standard-output
	(princ "Cannot find symbol \"")
	(princ prefixitem)
	(princ "\" in datatype:
  ")
	(semantic-analyzer-debug-insert-tag dt)
	(princ "\n")

	(cond
	 ;; Any language with a namespace.
	 ((string= (semantic-tag-type dt) "namespace")
	  (princ "Semantic may not have found all possible namespaces with
the name ")
	  (princ (semantic-tag-name dt))
	  (princ ".  You can debug the entire typecache, including merged namespaces
with the command:

  M-x semanticdb-typecache-dump RET")
	  )

	 ;; @todo - external declarations??
	 (nil
	  nil)

	 ;; A generic explanation
	 (t
	  (princ "\nSemantic has found the datatype ")
	  (semantic-analyzer-debug-insert-tag dt)
	  (if (or (not (semantic-equivalent-tag-p ots dt))
		  (not (with-current-buffer orig-buffer
			 (car (semantic-analyze-dereference-metatype
			  ots (oref ctxt scope))))))
	      (let ((lasttype ots)
		    (nexttype (with-current-buffer orig-buffer
				(car (semantic-analyze-dereference-metatype
				 ots (oref ctxt scope))))))
		(if (eq nexttype lasttype)
		    (princ "\n  [ Debugger error trying to help with metatypes ]")

		  (if (eq ots dt)
		      (princ "\nwhich is a metatype")
		    (princ "\nwhich is derived from metatype ")
		    (semantic-analyzer-debug-insert-tag lasttype)))

		(princ ".\nThe Metatype stack is:\n")
		(princ "   ")
		(semantic-analyzer-debug-insert-tag lasttype)
		(princ "\n")
		(while (and nexttype
			    (not (eq nexttype lasttype)))
		  (princ "   ")
		  (semantic-analyzer-debug-insert-tag nexttype)
		  (princ "\n")
		  (setq lasttype nexttype
			nexttype
			(with-current-buffer orig-buffer
			  (car (semantic-analyze-dereference-metatype
			   nexttype (oref ctxt scope)))))
		  )
		(when (not nexttype)
		  (princ "   nil\n\n")
		  (princ
		   "Last metatype is nil.  This means that semantic cannot derive
the list of members because the type referred to cannot be found.\n")
		  )
		)
	    (princ "\nand its list of members.")

	    (if (not comp)
		(progn
		  (princ "  Semantic does not know what
possible completions there are for \"")
		  (princ prefixitem)
		  (princ "\".  Examine the known
members below for more."))
	      (princ "  Semantic knows of some
possible completions for \"")
	      (princ prefixitem)
	      (princ "\".")))
	  )
	 ;; end cond
	 )

	(princ "\n")
	(semantic-analyzer-debug-show-completions comp)

	(princ "\nKnown members of ")
	(princ (semantic-tag-name dt))
	(princ ":\n")
	(dolist (M (semantic-tag-type-members dt))
	  (princ "  ")
	  ;;(princ (semantic-format-tag-prototype M))
	  (semantic-analyzer-debug-insert-tag M)
	  (princ "\n"))

	;; This doesn't refer to in-type completions.
	;;(semantic-analyzer-debug-global-miss-text prefixitem)

	;; More explanation
	(when desired-type
	  (princ "\nWhen there are known members that would make good completion
candidates that are not in the completion list, then the most likely
cause is a type constraint.  Semantic has determined that there is a
type constraint looking for the type ")
	  (if (semantic-tag-p desired-type)
	      (semantic-analyzer-debug-insert-tag desired-type)
	    (princ (format "%S" desired-type)))
	  (princ "."))
	))
    (semantic-analyzer-debug-add-buttons)

    ))


(defun semantic-analyzer-debug-test-local-context ()
  "Test the local context parsed from the file."
  (let* ((prefixandbounds (semantic-ctxt-current-symbol-and-bounds (point)))
	 (prefix (car prefixandbounds))
	 (bounds (nth 2 prefixandbounds))
	 )
    (when (and (or (not prefixandbounds)
		   (not prefix)
		   (not bounds))
	       )
      (with-output-to-temp-buffer (help-buffer)
	(with-current-buffer standard-output
	  (princ "Local Context Parser Failed.

If this is unexpected, then there is likely a bug in the Semantic
local context parser.

Consider debugging the function ")
	  (let ((lcf (fetch-overload 'semantic-ctxt-current-symbol-and-bounds)))
	    (if lcf
		(princ (symbol-name lcf))
	      (princ "semantic-ctxt-current-symbol-and-bounds,
or implementing a version specific to ")
	      (princ (symbol-name major-mode))
	      )
	    (princ ".\n"))
	  (semantic-analyzer-debug-add-buttons)
	t)))
    ))

;;; General Inserters with help
;;
(defun semantic-analyzer-debug-show-completions (comp)
  "Show the completion list COMP."
  (if (not comp)
      (princ "\nNo known possible completions.\n")

    (princ "\nPossible completions are:\n")
    (dolist (C comp)
      (princ "  ")
      (cond ((stringp C)
	     (princ C)
	     )
	    ((semantic-tag-p C)
	     (semantic-analyzer-debug-insert-tag C)))
      (princ "\n"))
    (princ "\n")))

(defvar semantic-dependency-system-include-path)

(defun semantic-analyzer-debug-insert-include-summary (table)
  "Display a summary of includes for the semanticdb TABLE."
  (require 'semantic/dep)
  (semantic-fetch-tags)
  (let ((inc (semantic-find-tags-by-class 'include table))
	;;(path (semanticdb-find-test-translate-path-no-loading))
	(unk
	 (with-current-buffer (semanticdb-get-buffer table)
	   semanticdb-find-lost-includes))
	(ip
	 (with-current-buffer (semanticdb-get-buffer table)
	   semantic-dependency-system-include-path))
	(edeobj
	 (with-current-buffer (semanticdb-get-buffer table)
	   (and (boundp 'ede-object)
		ede-object)))
	(edeproj
	 (with-current-buffer (semanticdb-get-buffer table)
	   (and (boundp 'ede-object-project)
		ede-object-project))))

    (princ "\n\nInclude Path Summary:")
    (when edeobj
	(princ (substitute-command-keys
		"\n\nThis file's project include search is handled by the EDE object:\n"))
	(princ "  Buffer Target:  ")
	(princ (object-print edeobj))
	(princ "\n")
	(when (not (eq edeobj edeproj))
	  (princ "  Buffer Project: ")
	  (princ (object-print edeproj))
	  (princ "\n"))
	(when edeproj
	  (let ((loc (ede-get-locator-object edeproj)))
	    (princ "  Backup Locator: ")
	    (princ (object-print loc))
	    (princ "\n")))
	)

    (princ "\n\nThe system include path is:\n")
    (dolist (dir ip)
      (princ "  ")
      (princ dir)
      (princ "\n"))

    (princ "\n\nInclude Summary: ")
    (princ (semanticdb-full-filename table))
    (princ "\n\n")
    (princ (format "%s contains %d includes.\n"
		   (file-name-nondirectory
		    (semanticdb-full-filename table))
		   (length inc)))
    (let ((ok 0)
	  (unknown 0)
	  (unparsed 0)
	  (all 0))
      (dolist (i inc)
	(let* ((fileinner (semantic-dependency-tag-file i))
	       (tableinner (when fileinner
			     (semanticdb-file-table-object fileinner t))))
	  (cond ((not fileinner)
		 (setq unknown (1+ unknown)))
		((and tableinner (number-or-marker-p (oref tableinner pointmax)))
		 (setq ok (1+ ok)))
		(t
		 (setq unparsed (1+ unparsed))))))
      (setq all (+ ok unknown unparsed))
      (when (not (= 0 all))
	(princ (format "   Unknown Includes:  %d\n" unknown))
	(princ (format "   Unparsed Includes: %d\n" unparsed))
	(princ (format "   Parsed Includes:   %d\n" ok)))
      )

    ;; Unknowns...
    (if unk
	(progn
	  (princ "\nA likely cause of an unfound tag is missing include files.")
	  (semantic-analyzer-debug-insert-tag-list
	   "The following includes were not found" unk)

	  (princ "\nYou can fix the include path for ")
	  (princ (symbol-name (oref table major-mode)))
	  (princ (substitute-command-keys " by using this function:

\\[semantic-customize-system-include-path]

which customizes the mode specific variable for the mode-local
variable `semantic-dependency-system-include-path'."))
	  )

      (princ "\n No unknown includes.\n"))
    ))

(defun semantic-analyzer-debug-describe-scope (ctxt &optional classconstraint)
  "Describe the scope in CTXT for finding a global symbol.
Optional argument CLASSCONSTRAINT says to output to tags of that class."
  (let* ((scope (oref ctxt :scope))
	 (parents (oref scope parents))
	 (cc (or classconstraint (oref ctxt prefixclass)))
	 )
    (princ "\nLocal Scope Information:")
    (princ "\n * Tag Class Constraint against SCOPE: ")
    (princ (format "%S" classconstraint))

    (if parents
	(semantic-analyzer-debug-insert-tag-list
	 " >> Known parent types with possible in scope symbols"
	 parents)
      (princ "\n * No known parents in current scope."))

    (let ((si (semantic-analyze-tags-of-class-list
	       (oref scope scope) cc))
	  (lv (semantic-analyze-tags-of-class-list
	       (oref scope localvar) cc))
	  )
      (if si
	  (semantic-analyzer-debug-insert-tag-list
	   " >> Known symbols within the current scope"
	   si)
	(princ "\n * No known symbols currently in scope."))

      (if lv
	  (semantic-analyzer-debug-insert-tag-list
	   " >> Known symbols that are declared locally"
	   lv)
	(princ "\n * No known symbols declared locally."))
      )
    )
  )

(defun semantic-analyzer-debug-global-miss-text (name-in)
  "Use `princ' to show text describing not finding symbol NAME-IN.
NAME is the name of the unfound symbol."
  (let ((name (cond ((stringp name-in)
		     name-in)
		    ((semantic-tag-p name-in)
		     (semantic-format-tag-name name-in))
		    (t (format "%S" name-in)))))
    (when (not (string= name ""))
      (princ "\nIf ")
      (princ name)
      (princ " is a local variable, argument, or symbol in some
namespace or class exposed via scoping statements, then it should
appear in the scope.

Debugging the scope can be done with:
  M-x semantic-calculate-scope RET

If the prefix is a global symbol, in an included file, then
your search path may be incomplete.
"))))

;;; Utils
;;
(defun semantic-analyzer-debug-insert-tag-list (text taglist)
  "Prefixing with TEXT, dump TAGLIST in a help buffer."
  (princ "\n") (princ text) (princ ":\n")

  (dolist (M taglist)
    (princ "  ")
    ;;(princ (semantic-format-tag-prototype M))
    (semantic-analyzer-debug-insert-tag M)
    (princ "\n"))
  )

(defun semantic-analyzer-debug-insert-tag (tag &optional parent)
  "Display a TAG by name, with possible jumpitude.
PARENT is a possible parent (by nesting) tag."
  (let ((str (semantic-format-tag-prototype tag parent)))
    (if (and (semantic-tag-with-position-p tag)
	     (semantic-tag-file-name tag))
	(with-current-buffer standard-output
	  (insert-button str
			 'mouse-face 'custom-button-pressed-face
			 'tag tag
			 'action
			 `(lambda (button)
			    (let ((buff nil)
				  (pnt nil))
			      (save-excursion
				(semantic-go-to-tag
				 (button-get button 'tag))
				(setq buff (current-buffer))
				(setq pnt (point)))
			      (if (get-buffer-window buff)
				  (select-window (get-buffer-window buff))
				(pop-to-buffer buff t))
			      (goto-char pnt)
			      (pulse-line-hook-function)))
			 ))
      (princ "\"")
      (princ str)
      (princ "\""))
    ))

(defvar semantic-analyzer-debug-orig nil
  "The originating buffer for a help button.")

(defun semantic-analyzer-debug-add-buttons ()
  "Add push-buttons to the *Help* buffer.
Look for key expressions, and add push-buttons near them."
  (let ((orig-buffer (make-marker)))
    (set-marker orig-buffer (point) (current-buffer))
    ;; Get a buffer ready.
    (with-current-buffer "*Help*"
      (let ((inhibit-read-only t))
	(goto-char (point-min))
	(set (make-local-variable 'semantic-analyzer-debug-orig) orig-buffer)
	;; First, add do-in buttons to recommendations.
	(while (re-search-forward "^\\s-*M-x \\(\\(\\w\\|\\s_\\)+\\) " nil t)
	  (let ((fcn (match-string 1)))
	    (when (not (fboundp (intern-soft fcn)))
	      (error "Help Err: Can't find %s" fcn))
	    (end-of-line)
	    (insert "   ")
	    (insert-button "[ Do It ]"
			   'mouse-face 'custom-button-pressed-face
			   'do-fcn fcn
			   'action `(lambda (arg)
				      (let ((M semantic-analyzer-debug-orig))
					(set-buffer (marker-buffer M))
					(goto-char M))
				      (call-interactively (quote ,(intern-soft fcn))))))))
      ;; Do something else?
      ;; Clean up the mess
      (set-buffer-modified-p nil))))

(provide 'semantic/analyze/debug)

;;; semantic/analyze/debug.el ends here