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/* Support for complaint handling during symbol reading in GDB.
Copyright (C) 1990-2024 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 "complaints.h"
#include "command.h"
#include "cli/cli-cmds.h"
#include "run-on-main-thread.h"
#include "top.h"
#include "gdbsupport/selftest.h"
#include <unordered_map>
#if CXX_STD_THREAD
#include <mutex>
#endif
/* Map format strings to counters. */
static std::unordered_map<const char *, int> counters;
/* 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;
#if CXX_STD_THREAD
static std::mutex complaint_mutex;
#endif /* CXX_STD_THREAD */
/* See complaints.h. */
void
complaint_internal (const char *fmt, ...)
{
va_list args;
{
#if CXX_STD_THREAD
std::lock_guard<std::mutex> guard (complaint_mutex);
#endif
if (++counters[fmt] > stop_whining)
return;
}
va_start (args, fmt);
warning_hook_handler handler = get_warning_hook_handler ();
if (handler != nullptr)
handler->warn (fmt, args);
else
{
gdb_puts (_("During symbol reading: "), gdb_stderr);
gdb_vprintf (gdb_stderr, fmt, args);
gdb_puts ("\n", gdb_stderr);
}
va_end (args);
}
/* See complaints.h. */
void
clear_complaints ()
{
counters.clear ();
}
/* See complaints.h. */
thread_local complaint_interceptor *complaint_interceptor::g_complaint_interceptor;
/* See complaints.h. */
complaint_interceptor::complaint_interceptor ()
: m_saved_complaint_interceptor (&g_complaint_interceptor, this),
m_saved_warning_hook (this)
{
}
/* A helper that wraps a warning hook. */
static void
wrap_warning_hook (warning_hook_handler hook, ...)
{
va_list args;
va_start (args, hook);
hook->warn ("%s", args);
va_end (args);
}
/* See complaints.h. */
void
re_emit_complaints (const complaint_collection &complaints)
{
gdb_assert (is_main_thread ());
for (const std::string &str : complaints)
{
warning_hook_handler handler = get_warning_hook_handler ();
if (handler != nullptr)
wrap_warning_hook (handler, str.c_str ());
else
gdb_printf (gdb_stderr, _("During symbol reading: %s\n"),
str.c_str ());
}
}
/* See complaints.h. */
void
complaint_interceptor::warn (const char *fmt, va_list args)
{
#if CXX_STD_THREAD
std::lock_guard<std::mutex> guard (complaint_mutex);
#endif
g_complaint_interceptor->m_complaints.insert (string_vprintf (fmt, args));
}
static void
complaints_show_value (struct ui_file *file, int from_tty,
struct cmd_list_element *cmd, const char *value)
{
gdb_printf (file, _("Max number of complaints about incorrect"
" symbols is %s.\n"),
value);
}
#if GDB_SELF_TEST
namespace selftests {
/* Entry point for complaints unit tests. */
static void
test_complaints ()
{
std::unordered_map<const char *, int> tmp;
scoped_restore reset_counters = make_scoped_restore (&counters, tmp);
scoped_restore reset_stop_whining = make_scoped_restore (&stop_whining, 2);
#define CHECK_COMPLAINT(STR, CNT) \
do \
{ \
std::string output; \
execute_fn_to_string (output, []() { complaint (STR); }, false); \
std::string expected \
= _("During symbol reading: ") + std::string (STR "\n"); \
SELF_CHECK (output == expected); \
SELF_CHECK (counters[STR] == CNT); \
} while (0)
#define CHECK_COMPLAINT_SILENT(STR, CNT) \
do \
{ \
std::string output; \
execute_fn_to_string (output, []() { complaint (STR); }, false); \
SELF_CHECK (output.empty ()); \
SELF_CHECK (counters[STR] == CNT); \
} while (0)
CHECK_COMPLAINT ("maintenance complaint 0", 1);
CHECK_COMPLAINT ("maintenance complaint 0", 2);
CHECK_COMPLAINT_SILENT ("maintenance complaint 0", 3);
CHECK_COMPLAINT ("maintenance complaint 1", 1);
clear_complaints ();
CHECK_COMPLAINT ("maintenance complaint 0", 1);
#undef CHECK_COMPLAINT
#undef CHECK_COMPLAINT_SILENT
}
} // namespace selftests
#endif /* GDB_SELF_TEST */
void _initialize_complaints ();
void
_initialize_complaints ()
{
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);
#if GDB_SELF_TEST
selftests::register_test ("complaints", selftests::test_complaints);
#endif /* GDB_SELF_TEST */
}
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