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/* Support for complaint handling during symbol reading in GDB.
Copyright (C) 1990-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "complaints.h"
#include "command.h"
#include "gdbcmd.h"
/* Should each complaint message be self explanatory, or should we
assume that a series of complaints is being produced? */
enum complaint_series {
/* Isolated self explanatory message. */
ISOLATED_MESSAGE,
/* First message of a series, but does not need to include any sort
of explanation. */
SHORT_FIRST_MESSAGE,
};
/* Structure to manage complaints about symbol file contents. */
struct complain
{
const char *file;
int line;
const char *fmt;
int counter;
struct complain *next;
};
/* The explanatory message that should accompany the complaint. The
message is in two parts - pre and post - that are printed around
the complaint text. */
struct explanation
{
const char *prefix;
const char *postfix;
};
struct complaints
{
struct complain *root;
enum complaint_series series;
/* The explanatory messages that should accompany the complaint.
NOTE: cagney/2002-08-14: In a desperate attempt at being vaguely
i18n friendly, this is an array of two messages. When present,
the PRE and POST EXPLANATION[SERIES] are used to wrap the
message. */
const struct explanation *explanation;
};
static struct complain complaint_sentinel;
/* The symbol table complaint table. */
static struct explanation symfile_explanations[] = {
{ "During symbol reading, ", "." },
{ "", "..."},
{ NULL, NULL }
};
static struct complaints symfile_complaint_book = {
&complaint_sentinel,
ISOLATED_MESSAGE,
symfile_explanations
};
static struct complain * ATTRIBUTE_PRINTF (4, 0)
find_complaint (struct complaints *complaints, const char *file,
int line, const char *fmt)
{
struct complain *complaint;
/* Find the complaint in the table. A more efficient search
algorithm (based on hash table or something) could be used. But
that can wait until someone shows evidence that this lookup is
a real bottle neck. */
for (complaint = complaints->root;
complaint != NULL;
complaint = complaint->next)
{
if (complaint->fmt == fmt
&& complaint->file == file
&& complaint->line == line)
return complaint;
}
/* Oops not seen before, fill in a new complaint. */
complaint = XNEW (struct complain);
complaint->fmt = fmt;
complaint->file = file;
complaint->line = line;
complaint->counter = 0;
complaint->next = NULL;
/* File it, return it. */
complaint->next = complaints->root;
complaints->root = complaint;
return complaint;
}
/* How many complaints about a particular thing should be printed
before we stop whining about it? Default is no whining at all,
since so many systems have ill-constructed symbol files. */
int stop_whining = 0;
/* Print a complaint, and link the complaint block into a chain for
later handling. */
static void ATTRIBUTE_PRINTF (3, 0)
vcomplaint (const char *file,
int line, const char *fmt,
va_list args)
{
struct complain *complaint = find_complaint (&symfile_complaint_book, file,
line, fmt);
enum complaint_series series;
complaint->counter++;
if (complaint->counter > stop_whining)
return;
series = symfile_complaint_book.series;
/* Pass 'fmt' instead of 'complaint->fmt' to printf-like callees
from here on, to avoid "format string is not a string literal"
warnings. 'fmt' is this function's printf-format parameter, so
the compiler can assume the passed in argument is a literal
string somewhere up the call chain. */
gdb_assert (complaint->fmt == fmt);
if (complaint->file != NULL)
internal_vwarning (complaint->file, complaint->line, fmt, args);
else if (deprecated_warning_hook)
(*deprecated_warning_hook) (fmt, args);
else
{
if (symfile_complaint_book.explanation == NULL)
/* A [v]warning() call always appends a newline. */
vwarning (fmt, args);
else
{
std::string msg = string_vprintf (fmt, args);
wrap_here ("");
begin_line ();
/* XXX: i18n */
fprintf_filtered (gdb_stderr, "%s%s%s",
symfile_complaint_book.explanation[series].prefix,
msg.c_str (),
symfile_complaint_book.explanation[series].postfix);
/* Force a line-break after any isolated message. */
if (series == ISOLATED_MESSAGE)
/* It would be really nice to use begin_line() here.
Unfortunately that function doesn't track GDB_STDERR and
consequently will sometimes supress a line when it
shouldn't. */
fputs_filtered ("\n", gdb_stderr);
else
wrap_here ("");
}
}
/* If GDB dumps core, we'd like to see the complaints first.
Presumably GDB will not be sending so many complaints that this
becomes a performance hog. */
gdb_flush (gdb_stderr);
}
void
complaint_internal (const char *fmt, ...)
{
va_list args;
va_start (args, fmt);
vcomplaint (NULL/*file*/, 0/*line*/, fmt, args);
va_end (args);
}
/* Clear out / initialize all complaint counters that have ever been
incremented. If LESS_VERBOSE is 1, be less verbose about
successive complaints, since the messages are appearing all
together during a command that is reporting a contiguous block of
complaints (rather than being interleaved with other messages). */
void
clear_complaints (int less_verbose)
{
struct complain *p;
for (p = symfile_complaint_book.root; p != NULL; p = p->next)
{
p->counter = 0;
}
if (!less_verbose)
symfile_complaint_book.series = ISOLATED_MESSAGE;
else
symfile_complaint_book.series = SHORT_FIRST_MESSAGE;
}
static void
complaints_show_value (struct ui_file *file, int from_tty,
struct cmd_list_element *cmd, const char *value)
{
fprintf_filtered (file, _("Max number of complaints about incorrect"
" symbols is %s.\n"),
value);
}
void
_initialize_complaints (void)
{
add_setshow_zinteger_cmd ("complaints", class_support,
&stop_whining, _("\
Set max number of complaints about incorrect symbols."), _("\
Show max number of complaints about incorrect symbols."), NULL,
NULL, complaints_show_value,
&setlist, &showlist);
}
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