1 /* Support for complaint handling during symbol reading in GDB.
3 Copyright (C) 1990-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "complaints.h"
25 extern void _initialize_complaints (void);
27 /* Should each complaint message be self explanatory, or should we
28 assume that a series of complaints is being produced? */
30 enum complaint_series {
31 /* Isolated self explanatory message. */
34 /* First message of a series, includes an explanation. */
37 /* First message of a series, but does not need to include any sort
41 /* Subsequent message of a series that needs no explanation (the
42 user already knows we have a problem so we can just state our
47 /* Structure to manage complaints about symbol file contents. */
55 struct complain *next;
58 /* The explanatory message that should accompany the complaint. The
59 message is in two parts - pre and post - that are printed around
60 the complaint text. */
69 struct complain *root;
71 enum complaint_series series;
73 /* The explanatory messages that should accompany the complaint.
74 NOTE: cagney/2002-08-14: In a desperate attempt at being vaguely
75 i18n friendly, this is an array of two messages. When present,
76 the PRE and POST EXPLANATION[SERIES] are used to wrap the
78 const struct explanation *explanation;
81 static struct complain complaint_sentinel;
83 /* The symbol table complaint table. */
85 static struct explanation symfile_explanations[] = {
86 { "During symbol reading, ", "." },
87 { "During symbol reading...", "..."},
93 static struct complaints symfile_complaint_book = {
98 struct complaints *symfile_complaints = &symfile_complaint_book;
100 /* Wrapper function to, on-demand, fill in a complaints object. */
102 static struct complaints *
103 get_complaints (struct complaints **c)
107 (*c) = XNEW (struct complaints);
108 (*c)->root = &complaint_sentinel;
109 (*c)->series = ISOLATED_MESSAGE;
110 (*c)->explanation = NULL;
114 static struct complain * ATTRIBUTE_PRINTF (4, 0)
115 find_complaint (struct complaints *complaints, const char *file,
116 int line, const char *fmt)
118 struct complain *complaint;
120 /* Find the complaint in the table. A more efficient search
121 algorithm (based on hash table or something) could be used. But
122 that can wait until someone shows evidence that this lookup is
123 a real bottle neck. */
124 for (complaint = complaints->root;
126 complaint = complaint->next)
128 if (complaint->fmt == fmt
129 && complaint->file == file
130 && complaint->line == line)
134 /* Oops not seen before, fill in a new complaint. */
135 complaint = XNEW (struct complain);
136 complaint->fmt = fmt;
137 complaint->file = file;
138 complaint->line = line;
139 complaint->counter = 0;
140 complaint->next = NULL;
142 /* File it, return it. */
143 complaint->next = complaints->root;
144 complaints->root = complaint;
149 /* How many complaints about a particular thing should be printed
150 before we stop whining about it? Default is no whining at all,
151 since so many systems have ill-constructed symbol files. */
153 static int stop_whining = 0;
155 /* Print a complaint, and link the complaint block into a chain for
158 static void ATTRIBUTE_PRINTF (4, 0)
159 vcomplaint (struct complaints **c, const char *file,
160 int line, const char *fmt,
163 struct complaints *complaints = get_complaints (c);
164 struct complain *complaint = find_complaint (complaints, file,
166 enum complaint_series series;
168 gdb_assert (complaints != NULL);
170 complaint->counter++;
171 if (complaint->counter > stop_whining)
175 series = SUBSEQUENT_MESSAGE;
177 series = complaints->series;
179 /* Pass 'fmt' instead of 'complaint->fmt' to printf-like callees
180 from here on, to avoid "format string is not a string literal"
181 warnings. 'fmt' is this function's printf-format parameter, so
182 the compiler can assume the passed in argument is a literal
183 string somewhere up the call chain. */
184 gdb_assert (complaint->fmt == fmt);
186 if (complaint->file != NULL)
187 internal_vwarning (complaint->file, complaint->line, fmt, args);
188 else if (deprecated_warning_hook)
189 (*deprecated_warning_hook) (fmt, args);
192 if (complaints->explanation == NULL)
193 /* A [v]warning() call always appends a newline. */
194 vwarning (fmt, args);
198 struct cleanup *cleanups;
199 msg = xstrvprintf (fmt, args);
200 cleanups = make_cleanup (xfree, msg);
202 if (series != SUBSEQUENT_MESSAGE)
205 fprintf_filtered (gdb_stderr, "%s%s%s",
206 complaints->explanation[series].prefix, msg,
207 complaints->explanation[series].postfix);
208 /* Force a line-break after any isolated message. For the
209 other cases, clear_complaints() takes care of any missing
210 trailing newline, the wrap_here() is just a hint. */
211 if (series == ISOLATED_MESSAGE)
212 /* It would be really nice to use begin_line() here.
213 Unfortunately that function doesn't track GDB_STDERR and
214 consequently will sometimes supress a line when it
216 fputs_filtered ("\n", gdb_stderr);
219 do_cleanups (cleanups);
225 case ISOLATED_MESSAGE:
228 complaints->series = SUBSEQUENT_MESSAGE;
230 case SUBSEQUENT_MESSAGE:
231 case SHORT_FIRST_MESSAGE:
232 complaints->series = SUBSEQUENT_MESSAGE;
236 /* If GDB dumps core, we'd like to see the complaints first.
237 Presumably GDB will not be sending so many complaints that this
238 becomes a performance hog. */
240 gdb_flush (gdb_stderr);
244 complaint (struct complaints **complaints, const char *fmt, ...)
248 va_start (args, fmt);
249 vcomplaint (complaints, NULL/*file*/, 0/*line*/, fmt, args);
254 internal_complaint (struct complaints **complaints, const char *file,
255 int line, const char *fmt, ...)
258 va_start (args, fmt);
259 vcomplaint (complaints, file, line, fmt, args);
263 /* Clear out / initialize all complaint counters that have ever been
264 incremented. If LESS_VERBOSE is 1, be less verbose about
265 successive complaints, since the messages are appearing all
266 together during a command that is reporting a contiguous block of
267 complaints (rather than being interleaved with other messages). If
268 noisy is 1, we are in a noisy command, and our caller will print
269 enough context for the user to figure it out. */
272 clear_complaints (struct complaints **c, int less_verbose, int noisy)
274 struct complaints *complaints = get_complaints (c);
277 for (p = complaints->root; p != NULL; p = p->next)
282 switch (complaints->series)
285 /* Haven't yet printed anything. */
287 case SHORT_FIRST_MESSAGE:
288 /* Haven't yet printed anything. */
290 case ISOLATED_MESSAGE:
291 /* The code above, always forces a line-break. No need to do it
294 case SUBSEQUENT_MESSAGE:
295 /* It would be really nice to use begin_line() here.
296 Unfortunately that function doesn't track GDB_STDERR and
297 consequently will sometimes supress a line when it
299 fputs_unfiltered ("\n", gdb_stderr);
302 internal_error (__FILE__, __LINE__, _("bad switch"));
306 complaints->series = ISOLATED_MESSAGE;
308 complaints->series = FIRST_MESSAGE;
310 complaints->series = SHORT_FIRST_MESSAGE;
314 complaints_show_value (struct ui_file *file, int from_tty,
315 struct cmd_list_element *cmd, const char *value)
317 fprintf_filtered (file, _("Max number of complaints about incorrect"
318 " symbols is %s.\n"),
323 _initialize_complaints (void)
325 add_setshow_zinteger_cmd ("complaints", class_support,
327 Set max number of complaints about incorrect symbols."), _("\
328 Show max number of complaints about incorrect symbols."), NULL,
329 NULL, complaints_show_value,
330 &setlist, &showlist);