330 lines
9.3 KiB
C
330 lines
9.3 KiB
C
/* Support for complaint handling during symbol reading in GDB.
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Copyright (C) 1990-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "complaints.h"
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#include "command.h"
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#include "gdbcmd.h"
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/* Should each complaint message be self explanatory, or should we
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assume that a series of complaints is being produced? */
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enum complaint_series {
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/* Isolated self explanatory message. */
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ISOLATED_MESSAGE,
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/* First message of a series, includes an explanation. */
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FIRST_MESSAGE,
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/* First message of a series, but does not need to include any sort
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of explanation. */
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SHORT_FIRST_MESSAGE,
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/* Subsequent message of a series that needs no explanation (the
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user already knows we have a problem so we can just state our
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piece). */
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SUBSEQUENT_MESSAGE
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};
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/* Structure to manage complaints about symbol file contents. */
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struct complain
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{
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const char *file;
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int line;
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const char *fmt;
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int counter;
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struct complain *next;
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};
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/* The explanatory message that should accompany the complaint. The
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message is in two parts - pre and post - that are printed around
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the complaint text. */
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struct explanation
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{
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const char *prefix;
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const char *postfix;
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};
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struct complaints
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{
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struct complain *root;
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enum complaint_series series;
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/* The explanatory messages that should accompany the complaint.
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NOTE: cagney/2002-08-14: In a desperate attempt at being vaguely
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i18n friendly, this is an array of two messages. When present,
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the PRE and POST EXPLANATION[SERIES] are used to wrap the
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message. */
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const struct explanation *explanation;
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};
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static struct complain complaint_sentinel;
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/* The symbol table complaint table. */
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static struct explanation symfile_explanations[] = {
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{ "During symbol reading, ", "." },
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{ "During symbol reading...", "..."},
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{ "", "..."},
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{ "", "..."},
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{ NULL, NULL }
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};
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static struct complaints symfile_complaint_book = {
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&complaint_sentinel,
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ISOLATED_MESSAGE,
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symfile_explanations
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};
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struct complaints *symfile_complaints = &symfile_complaint_book;
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/* Wrapper function to, on-demand, fill in a complaints object. */
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static struct complaints *
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get_complaints (struct complaints **c)
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{
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if ((*c) != NULL)
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return (*c);
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(*c) = XNEW (struct complaints);
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(*c)->root = &complaint_sentinel;
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(*c)->series = ISOLATED_MESSAGE;
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(*c)->explanation = NULL;
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return (*c);
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}
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static struct complain * ATTRIBUTE_PRINTF (4, 0)
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find_complaint (struct complaints *complaints, const char *file,
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int line, const char *fmt)
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{
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struct complain *complaint;
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/* Find the complaint in the table. A more efficient search
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algorithm (based on hash table or something) could be used. But
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that can wait until someone shows evidence that this lookup is
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a real bottle neck. */
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for (complaint = complaints->root;
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complaint != NULL;
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complaint = complaint->next)
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{
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if (complaint->fmt == fmt
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&& complaint->file == file
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&& complaint->line == line)
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return complaint;
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}
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/* Oops not seen before, fill in a new complaint. */
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complaint = XNEW (struct complain);
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complaint->fmt = fmt;
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complaint->file = file;
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complaint->line = line;
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complaint->counter = 0;
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complaint->next = NULL;
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/* File it, return it. */
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complaint->next = complaints->root;
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complaints->root = complaint;
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return complaint;
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}
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/* How many complaints about a particular thing should be printed
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before we stop whining about it? Default is no whining at all,
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since so many systems have ill-constructed symbol files. */
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static int stop_whining = 0;
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/* Print a complaint, and link the complaint block into a chain for
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later handling. */
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static void ATTRIBUTE_PRINTF (4, 0)
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vcomplaint (struct complaints **c, const char *file,
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int line, const char *fmt,
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va_list args)
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{
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struct complaints *complaints = get_complaints (c);
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struct complain *complaint = find_complaint (complaints, file,
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line, fmt);
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enum complaint_series series;
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gdb_assert (complaints != NULL);
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complaint->counter++;
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if (complaint->counter > stop_whining)
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return;
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if (info_verbose)
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series = SUBSEQUENT_MESSAGE;
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else
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series = complaints->series;
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/* Pass 'fmt' instead of 'complaint->fmt' to printf-like callees
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from here on, to avoid "format string is not a string literal"
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warnings. 'fmt' is this function's printf-format parameter, so
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the compiler can assume the passed in argument is a literal
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string somewhere up the call chain. */
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gdb_assert (complaint->fmt == fmt);
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if (complaint->file != NULL)
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internal_vwarning (complaint->file, complaint->line, fmt, args);
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else if (deprecated_warning_hook)
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(*deprecated_warning_hook) (fmt, args);
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else
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{
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if (complaints->explanation == NULL)
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/* A [v]warning() call always appends a newline. */
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vwarning (fmt, args);
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else
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{
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char *msg;
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struct cleanup *cleanups;
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msg = xstrvprintf (fmt, args);
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cleanups = make_cleanup (xfree, msg);
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wrap_here ("");
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if (series != SUBSEQUENT_MESSAGE)
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begin_line ();
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/* XXX: i18n */
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fprintf_filtered (gdb_stderr, "%s%s%s",
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complaints->explanation[series].prefix, msg,
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complaints->explanation[series].postfix);
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/* Force a line-break after any isolated message. For the
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other cases, clear_complaints() takes care of any missing
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trailing newline, the wrap_here() is just a hint. */
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if (series == ISOLATED_MESSAGE)
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/* It would be really nice to use begin_line() here.
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Unfortunately that function doesn't track GDB_STDERR and
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consequently will sometimes supress a line when it
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shouldn't. */
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fputs_filtered ("\n", gdb_stderr);
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else
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wrap_here ("");
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do_cleanups (cleanups);
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}
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}
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switch (series)
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{
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case ISOLATED_MESSAGE:
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break;
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case FIRST_MESSAGE:
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complaints->series = SUBSEQUENT_MESSAGE;
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break;
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case SUBSEQUENT_MESSAGE:
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case SHORT_FIRST_MESSAGE:
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complaints->series = SUBSEQUENT_MESSAGE;
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break;
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}
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/* If GDB dumps core, we'd like to see the complaints first.
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Presumably GDB will not be sending so many complaints that this
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becomes a performance hog. */
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gdb_flush (gdb_stderr);
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}
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void
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complaint (struct complaints **complaints, const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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vcomplaint (complaints, NULL/*file*/, 0/*line*/, fmt, args);
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va_end (args);
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}
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void
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internal_complaint (struct complaints **complaints, const char *file,
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int line, const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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vcomplaint (complaints, file, line, fmt, args);
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va_end (args);
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}
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/* Clear out / initialize all complaint counters that have ever been
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incremented. If LESS_VERBOSE is 1, be less verbose about
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successive complaints, since the messages are appearing all
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together during a command that is reporting a contiguous block of
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complaints (rather than being interleaved with other messages). If
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noisy is 1, we are in a noisy command, and our caller will print
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enough context for the user to figure it out. */
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void
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clear_complaints (struct complaints **c, int less_verbose, int noisy)
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{
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struct complaints *complaints = get_complaints (c);
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struct complain *p;
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for (p = complaints->root; p != NULL; p = p->next)
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{
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p->counter = 0;
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}
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switch (complaints->series)
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{
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case FIRST_MESSAGE:
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/* Haven't yet printed anything. */
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break;
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case SHORT_FIRST_MESSAGE:
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/* Haven't yet printed anything. */
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break;
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case ISOLATED_MESSAGE:
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/* The code above, always forces a line-break. No need to do it
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here. */
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break;
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case SUBSEQUENT_MESSAGE:
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/* It would be really nice to use begin_line() here.
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Unfortunately that function doesn't track GDB_STDERR and
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consequently will sometimes supress a line when it
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shouldn't. */
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fputs_unfiltered ("\n", gdb_stderr);
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break;
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default:
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internal_error (__FILE__, __LINE__, _("bad switch"));
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}
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if (!less_verbose)
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complaints->series = ISOLATED_MESSAGE;
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else if (!noisy)
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complaints->series = FIRST_MESSAGE;
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else
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complaints->series = SHORT_FIRST_MESSAGE;
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}
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static void
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complaints_show_value (struct ui_file *file, int from_tty,
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struct cmd_list_element *cmd, const char *value)
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{
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fprintf_filtered (file, _("Max number of complaints about incorrect"
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" symbols is %s.\n"),
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value);
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}
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void
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_initialize_complaints (void)
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{
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add_setshow_zinteger_cmd ("complaints", class_support,
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&stop_whining, _("\
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Set max number of complaints about incorrect symbols."), _("\
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Show max number of complaints about incorrect symbols."), NULL,
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NULL, complaints_show_value,
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&setlist, &showlist);
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}
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