1 /* Support for complaint handling during symbol reading in GDB.
3 Copyright (C) 1990-2017 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 /* Should each complaint message be self explanatory, or should we
26 assume that a series of complaints is being produced? */
28 enum complaint_series {
29 /* Isolated self explanatory message. */
32 /* First message of a series, includes an explanation. */
35 /* First message of a series, but does not need to include any sort
39 /* Subsequent message of a series that needs no explanation (the
40 user already knows we have a problem so we can just state our
45 /* Structure to manage complaints about symbol file contents. */
53 struct complain *next;
56 /* The explanatory message that should accompany the complaint. The
57 message is in two parts - pre and post - that are printed around
58 the complaint text. */
67 struct complain *root;
69 enum complaint_series series;
71 /* The explanatory messages that should accompany the complaint.
72 NOTE: cagney/2002-08-14: In a desperate attempt at being vaguely
73 i18n friendly, this is an array of two messages. When present,
74 the PRE and POST EXPLANATION[SERIES] are used to wrap the
76 const struct explanation *explanation;
79 static struct complain complaint_sentinel;
81 /* The symbol table complaint table. */
83 static struct explanation symfile_explanations[] = {
84 { "During symbol reading, ", "." },
85 { "During symbol reading...", "..."},
91 static struct complaints symfile_complaint_book = {
96 struct complaints *symfile_complaints = &symfile_complaint_book;
98 /* Wrapper function to, on-demand, fill in a complaints object. */
100 static struct complaints *
101 get_complaints (struct complaints **c)
105 (*c) = XNEW (struct complaints);
106 (*c)->root = &complaint_sentinel;
107 (*c)->series = ISOLATED_MESSAGE;
108 (*c)->explanation = NULL;
112 static struct complain * ATTRIBUTE_PRINTF (4, 0)
113 find_complaint (struct complaints *complaints, const char *file,
114 int line, const char *fmt)
116 struct complain *complaint;
118 /* Find the complaint in the table. A more efficient search
119 algorithm (based on hash table or something) could be used. But
120 that can wait until someone shows evidence that this lookup is
121 a real bottle neck. */
122 for (complaint = complaints->root;
124 complaint = complaint->next)
126 if (complaint->fmt == fmt
127 && complaint->file == file
128 && complaint->line == line)
132 /* Oops not seen before, fill in a new complaint. */
133 complaint = XNEW (struct complain);
134 complaint->fmt = fmt;
135 complaint->file = file;
136 complaint->line = line;
137 complaint->counter = 0;
138 complaint->next = NULL;
140 /* File it, return it. */
141 complaint->next = complaints->root;
142 complaints->root = complaint;
147 /* How many complaints about a particular thing should be printed
148 before we stop whining about it? Default is no whining at all,
149 since so many systems have ill-constructed symbol files. */
151 static int stop_whining = 0;
153 /* Print a complaint, and link the complaint block into a chain for
156 static void ATTRIBUTE_PRINTF (4, 0)
157 vcomplaint (struct complaints **c, const char *file,
158 int line, const char *fmt,
161 struct complaints *complaints = get_complaints (c);
162 struct complain *complaint = find_complaint (complaints, file,
164 enum complaint_series series;
166 gdb_assert (complaints != NULL);
168 complaint->counter++;
169 if (complaint->counter > stop_whining)
173 series = SUBSEQUENT_MESSAGE;
175 series = complaints->series;
177 /* Pass 'fmt' instead of 'complaint->fmt' to printf-like callees
178 from here on, to avoid "format string is not a string literal"
179 warnings. 'fmt' is this function's printf-format parameter, so
180 the compiler can assume the passed in argument is a literal
181 string somewhere up the call chain. */
182 gdb_assert (complaint->fmt == fmt);
184 if (complaint->file != NULL)
185 internal_vwarning (complaint->file, complaint->line, fmt, args);
186 else if (deprecated_warning_hook)
187 (*deprecated_warning_hook) (fmt, args);
190 if (complaints->explanation == NULL)
191 /* A [v]warning() call always appends a newline. */
192 vwarning (fmt, args);
196 struct cleanup *cleanups;
197 msg = xstrvprintf (fmt, args);
198 cleanups = make_cleanup (xfree, msg);
200 if (series != SUBSEQUENT_MESSAGE)
203 fprintf_filtered (gdb_stderr, "%s%s%s",
204 complaints->explanation[series].prefix, msg,
205 complaints->explanation[series].postfix);
206 /* Force a line-break after any isolated message. For the
207 other cases, clear_complaints() takes care of any missing
208 trailing newline, the wrap_here() is just a hint. */
209 if (series == ISOLATED_MESSAGE)
210 /* It would be really nice to use begin_line() here.
211 Unfortunately that function doesn't track GDB_STDERR and
212 consequently will sometimes supress a line when it
214 fputs_filtered ("\n", gdb_stderr);
217 do_cleanups (cleanups);
223 case ISOLATED_MESSAGE:
226 complaints->series = SUBSEQUENT_MESSAGE;
228 case SUBSEQUENT_MESSAGE:
229 case SHORT_FIRST_MESSAGE:
230 complaints->series = SUBSEQUENT_MESSAGE;
234 /* If GDB dumps core, we'd like to see the complaints first.
235 Presumably GDB will not be sending so many complaints that this
236 becomes a performance hog. */
238 gdb_flush (gdb_stderr);
242 complaint (struct complaints **complaints, const char *fmt, ...)
246 va_start (args, fmt);
247 vcomplaint (complaints, NULL/*file*/, 0/*line*/, fmt, args);
252 internal_complaint (struct complaints **complaints, const char *file,
253 int line, const char *fmt, ...)
256 va_start (args, fmt);
257 vcomplaint (complaints, file, line, fmt, args);
261 /* Clear out / initialize all complaint counters that have ever been
262 incremented. If LESS_VERBOSE is 1, be less verbose about
263 successive complaints, since the messages are appearing all
264 together during a command that is reporting a contiguous block of
265 complaints (rather than being interleaved with other messages). If
266 noisy is 1, we are in a noisy command, and our caller will print
267 enough context for the user to figure it out. */
270 clear_complaints (struct complaints **c, int less_verbose, int noisy)
272 struct complaints *complaints = get_complaints (c);
275 for (p = complaints->root; p != NULL; p = p->next)
280 switch (complaints->series)
283 /* Haven't yet printed anything. */
285 case SHORT_FIRST_MESSAGE:
286 /* Haven't yet printed anything. */
288 case ISOLATED_MESSAGE:
289 /* The code above, always forces a line-break. No need to do it
292 case SUBSEQUENT_MESSAGE:
293 /* It would be really nice to use begin_line() here.
294 Unfortunately that function doesn't track GDB_STDERR and
295 consequently will sometimes supress a line when it
297 fputs_unfiltered ("\n", gdb_stderr);
300 internal_error (__FILE__, __LINE__, _("bad switch"));
304 complaints->series = ISOLATED_MESSAGE;
306 complaints->series = FIRST_MESSAGE;
308 complaints->series = SHORT_FIRST_MESSAGE;
312 complaints_show_value (struct ui_file *file, int from_tty,
313 struct cmd_list_element *cmd, const char *value)
315 fprintf_filtered (file, _("Max number of complaints about incorrect"
316 " symbols is %s.\n"),
321 _initialize_complaints (void)
323 add_setshow_zinteger_cmd ("complaints", class_support,
325 Set max number of complaints about incorrect symbols."), _("\
326 Show max number of complaints about incorrect symbols."), NULL,
327 NULL, complaints_show_value,
328 &setlist, &showlist);