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mysqld.cc
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mysqld.cc
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/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights
reserved.
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; version 2 of the License.
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, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "my_global.h" /* NO_EMBEDDED_ACCESS_CHECKS */
#include <vector>
#include <algorithm>
#include <functional>
#include <list>
#include <set>
#include "sql_priv.h"
#include "unireg.h"
#include <signal.h>
#include "sql_parse.h"
#include "sql_locale.h" // MY_LOCALES, my_locales, my_locale_by_name
#include "sql_show.h" // free_status_vars, add_status_vars,
// reset_status_vars
#include "strfunc.h" // find_set_from_flags
#include "parse_file.h" // File_parser_dummy_hook
#include "sql_db.h" // my_dboptions_cache_free
// my_dboptions_cache_init
#include "sql_table.h" // release_ddl_log, execute_ddl_log_recovery
#include "sql_time.h" // known_date_time_formats,
// get_date_time_format_str,
// date_time_format_make
#include "sql_acl.h" // acl_free, grant_free, acl_init,
// grant_init
#include "sql_base.h" // table_def_free, table_def_init,
// Table_cache,
// cached_table_definitions
#include "sql_test.h" // mysql_print_status
#include "item_create.h" // item_create_cleanup, item_create_init
#include "sql_servers.h" // servers_free, servers_init
#include "init.h" // unireg_init
#include "derror.h" // init_errmessage
#include "derror.h" // init_errmessage
#include <m_ctype.h>
#include <my_dir.h>
#include <my_bit.h>
#include <sql_common.h>
#include <my_stacktrace.h>
#include "mysqld_suffix.h"
#include "mysys_err.h"
#include "probes_mysql.h"
#include "sql_callback.h"
#include "global_threads.h"
#include "mysqld.h"
#include "my_default.h"
#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
#include "../storage/perfschema/pfs_server.h"
#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */
#include <mysql/psi/mysql_idle.h>
#include <mysql/psi/mysql_socket.h>
#include <mysql/psi/mysql_statement.h>
#include "mysql_com_server.h"
#include "set_var.h"
#include "sys_vars_shared.h"
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#include <thr_alarm.h>
#include <ft_global.h>
#include <errmsg.h>
#include "sql_reload.h" // reload_acl_and_cache
#include "my_timer.h" // my_os_timer_init_ext, my_os_timer_deinit
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#ifdef HAVE_FESETROUND
#include <fenv.h>
#endif
using std::min;
using std::max;
using std::vector;
#define mysqld_charset &my_charset_latin1
/* We have HAVE_purify below as this speeds up the shutdown of MySQL */
#if defined(HAVE_DEC_3_2_THREADS) || defined(SIGNALS_DONT_BREAK_READ) || defined(HAVE_purify) && defined(__linux__)
#define HAVE_CLOSE_SERVER_SOCK 1
#endif
extern "C" { // Because of SCO 3.2V4.2
#include <errno.h>
#include <sys/stat.h>
#ifndef __GNU_LIBRARY__
#define __GNU_LIBRARY__ // Skip warnings in getopt.h
#endif
#include <my_getopt.h>
#ifdef HAVE_SYSENT_H
#include <sysent.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h> // For getpwent
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <my_net.h>
#if !defined(__WIN__)
#include <sys/resource.h>
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#ifdef HAVE_SELECT_H
#include <select.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <sys/utsname.h>
#endif /* __WIN__ */
#include <my_libwrap.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#ifdef __WIN__
#include <crtdbg.h>
#endif
#ifdef HAVE_SOLARIS_LARGE_PAGES
#include <sys/mman.h>
#if defined(__sun__) && defined(__GNUC__) && defined(__cplusplus) \
&& defined(_XOPEN_SOURCE)
extern int getpagesizes(size_t *, int);
extern int getpagesizes2(size_t *, int);
extern int memcntl(caddr_t, size_t, int, caddr_t, int, int);
#endif /* __sun__ ... */
#endif /* HAVE_SOLARIS_LARGE_PAGES */
#ifdef _AIX41
int initgroups(const char *,unsigned int);
#endif
#if defined(__FreeBSD__) && defined(HAVE_IEEEFP_H) && !defined(HAVE_FEDISABLEEXCEPT)
#include <ieeefp.h>
#ifdef HAVE_FP_EXCEPT // Fix type conflict
typedef fp_except fp_except_t;
#endif
#endif /* __FreeBSD__ && HAVE_IEEEFP_H && !HAVE_FEDISABLEEXCEPT */
#ifdef HAVE_SYS_FPU_H
/* for IRIX to use set_fpc_csr() */
#include <sys/fpu.h>
#endif
#ifdef HAVE_FPU_CONTROL_H
#include <fpu_control.h>
#endif
#if defined(__i386__) && !defined(HAVE_FPU_CONTROL_H)
# define fpu_control_t unsigned int
# define _FPU_EXTENDED 0x300
# define _FPU_DOUBLE 0x200
# if defined(__GNUC__) || (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x590)
# define _FPU_GETCW(cw) asm volatile ("fnstcw %0" : "=m" (*&cw))
# define _FPU_SETCW(cw) asm volatile ("fldcw %0" : : "m" (*&cw))
# else
# define _FPU_GETCW(cw) (cw= 0)
# define _FPU_SETCW(cw)
# endif
#endif
inline void setup_fpu()
{
#if defined(__FreeBSD__) && defined(HAVE_IEEEFP_H) && !defined(HAVE_FEDISABLEEXCEPT)
/* We can't handle floating point exceptions with threads, so disable
this on freebsd
Don't fall for overflow, underflow,divide-by-zero or loss of precision.
fpsetmask() is deprecated in favor of fedisableexcept() in C99.
*/
#if defined(FP_X_DNML)
fpsetmask(~(FP_X_INV | FP_X_DNML | FP_X_OFL | FP_X_UFL | FP_X_DZ |
FP_X_IMP));
#else
fpsetmask(~(FP_X_INV | FP_X_OFL | FP_X_UFL | FP_X_DZ |
FP_X_IMP));
#endif /* FP_X_DNML */
#endif /* __FreeBSD__ && HAVE_IEEEFP_H && !HAVE_FEDISABLEEXCEPT */
#ifdef HAVE_FEDISABLEEXCEPT
fedisableexcept(FE_ALL_EXCEPT);
#endif
#ifdef HAVE_FESETROUND
/* Set FPU rounding mode to "round-to-nearest" */
fesetround(FE_TONEAREST);
#endif /* HAVE_FESETROUND */
/*
x86 (32-bit) requires FPU precision to be explicitly set to 64 bit
(double precision) for portable results of floating point operations.
However, there is no need to do so if compiler is using SSE2 for floating
point, double values will be stored and processed in 64 bits anyway.
*/
#if defined(__i386__) && !defined(__SSE2_MATH__)
#if defined(_WIN32)
#if !defined(_WIN64)
_control87(_PC_53, MCW_PC);
#endif /* !_WIN64 */
#else /* !_WIN32 */
fpu_control_t cw;
_FPU_GETCW(cw);
cw= (cw & ~_FPU_EXTENDED) | _FPU_DOUBLE;
_FPU_SETCW(cw);
#endif /* _WIN32 && */
#endif /* __i386__ */
#if defined(__sgi) && defined(HAVE_SYS_FPU_H)
/* Enable denormalized DOUBLE values support for IRIX */
union fpc_csr n;
n.fc_word = get_fpc_csr();
n.fc_struct.flush = 0;
set_fpc_csr(n.fc_word);
#endif
}
} /* cplusplus */
#define MYSQL_KILL_SIGNAL SIGTERM
#include <my_pthread.h> // For thr_setconcurency()
#ifdef SOLARIS
extern "C" int gethostname(char *name, int namelen);
#endif
extern "C" sig_handler handle_fatal_signal(int sig);
#if defined(__linux__)
#define ENABLE_TEMP_POOL 1
#else
#define ENABLE_TEMP_POOL 0
#endif
/* Constants */
#include <welcome_copyright_notice.h> // ORACLE_WELCOME_COPYRIGHT_NOTICE
const char *show_comp_option_name[]= {"YES", "NO", "DISABLED"};
static const char *tc_heuristic_recover_names[]=
{
"NONE", "COMMIT", "ROLLBACK", NullS
};
static TYPELIB tc_heuristic_recover_typelib=
{
array_elements(tc_heuristic_recover_names)-1,"",
tc_heuristic_recover_names, NULL
};
const char *first_keyword= "first", *binary_keyword= "BINARY";
const char *my_localhost= "localhost", *delayed_user= "DELAYED";
bool opt_large_files= sizeof(my_off_t) > 4;
static my_bool opt_autocommit; ///< for --autocommit command-line option
/*
Used with --help for detailed option
*/
static my_bool opt_help= 0, opt_verbose= 0;
arg_cmp_func Arg_comparator::comparator_matrix[5][2] =
{{&Arg_comparator::compare_string, &Arg_comparator::compare_e_string},
{&Arg_comparator::compare_real, &Arg_comparator::compare_e_real},
{&Arg_comparator::compare_int_signed, &Arg_comparator::compare_e_int},
{&Arg_comparator::compare_row, &Arg_comparator::compare_e_row},
{&Arg_comparator::compare_decimal, &Arg_comparator::compare_e_decimal}};
/* static variables */
#ifdef HAVE_PSI_INTERFACE
#if (defined(_WIN32) || defined(HAVE_SMEM)) && !defined(EMBEDDED_LIBRARY)
static PSI_thread_key key_thread_handle_con_namedpipes;
static PSI_cond_key key_COND_handler_count;
#endif /* _WIN32 || HAVE_SMEM && !EMBEDDED_LIBRARY */
#if defined(HAVE_SMEM) && !defined(EMBEDDED_LIBRARY)
static PSI_thread_key key_thread_handle_con_sharedmem;
#endif /* HAVE_SMEM && !EMBEDDED_LIBRARY */
#if (defined(_WIN32) || defined(HAVE_SMEM)) && !defined(EMBEDDED_LIBRARY)
static PSI_thread_key key_thread_handle_con_sockets;
#endif /* _WIN32 || HAVE_SMEM && !EMBEDDED_LIBRARY */
#ifdef __WIN__
static PSI_thread_key key_thread_handle_shutdown;
#endif /* __WIN__ */
#if defined (HAVE_OPENSSL) && !defined(HAVE_YASSL)
static PSI_rwlock_key key_rwlock_openssl;
#endif
#endif /* HAVE_PSI_INTERFACE */
/**
Statement instrumentation key for replication.
*/
#ifdef HAVE_PSI_STATEMENT_INTERFACE
PSI_statement_info stmt_info_rpl;
#endif
/* the default log output is log tables */
static bool lower_case_table_names_used= 0;
/* See Bug#56666 and Bug#56760 */;
volatile bool ready_to_exit;
static my_bool opt_debugging= 0, opt_external_locking= 0, opt_console= 0;
static my_bool opt_short_log_format= 0;
static uint kill_blocked_pthreads_flag, wake_pthread;
static char *mysqld_user, *mysqld_chroot;
static char *default_character_set_name;
static char *character_set_filesystem_name;
static char *lc_messages;
static char *lc_time_names_name;
char *my_bind_addr_str;
static char *default_collation_name;
char *default_storage_engine;
char *default_tmp_storage_engine;
static char compiled_default_collation_name[]= MYSQL_DEFAULT_COLLATION_NAME;
LEX_STRING opt_init_connect, opt_init_slave;
static mysql_cond_t COND_thread_cache, COND_flush_thread_cache;
/* Global variables */
bool opt_bin_log, opt_ignore_builtin_innodb= 0;
my_bool opt_log, opt_log_raw;
ulonglong log_output_options;
my_bool opt_log_queries_not_using_indexes= 0;
ulong opt_log_throttle_queries_not_using_indexes= 0;
bool opt_error_log= IF_WIN(1,0);
bool opt_disable_networking=0, opt_skip_show_db=0;
bool opt_skip_name_resolve=0;
my_bool opt_character_set_client_handshake= 1;
bool server_id_supplied = 0;
bool opt_endinfo, using_udf_functions;
bool opt_using_transactions;
bool volatile abort_loop;
bool volatile shutdown_in_progress;
ulong log_warnings;
uint host_cache_size;
#if defined(_WIN32) && !defined(EMBEDDED_LIBRARY)
ulong slow_start_timeout;
#endif
/*
True if the bootstrap thread is running. Protected by LOCK_thread_count.
Used in bootstrap() function to determine if the bootstrap thread
has completed. Note, that we can't use 'thread_count' instead,
since in 5.1, in presence of the Event Scheduler, there may be
event threads running in parallel, so it's impossible to know
what value of 'thread_count' is a sign of completion of the
bootstrap thread.
At the same time, we can't start the event scheduler after
bootstrap either, since we want to be able to process event-related
SQL commands in the init file and in --bootstrap mode.
*/
bool in_bootstrap= FALSE;
my_bool opt_bootstrap= 0;
/**
@brief 'grant_option' is used to indicate if privileges needs
to be checked, in which case the lock, LOCK_grant, is used
to protect access to the grant table.
@note This flag is dropped in 5.1
@see grant_init()
*/
bool volatile grant_option;
my_bool opt_skip_slave_start = 0; ///< If set, slave is not autostarted
my_bool opt_reckless_slave = 0;
my_bool opt_enable_named_pipe= 0;
my_bool opt_local_infile, opt_slave_compressed_protocol;
my_bool opt_safe_user_create = 0;
my_bool opt_show_slave_auth_info;
my_bool opt_log_slave_updates= 0;
char *opt_slave_skip_errors;
my_bool opt_slave_allow_batching= 0;
/**
compatibility option:
- index usage hints (USE INDEX without a FOR clause) behave as in 5.0
*/
my_bool old_mode;
/*
Legacy global handlerton. These will be removed (please do not add more).
*/
handlerton *heap_hton;
handlerton *myisam_hton;
handlerton *partition_hton;
uint opt_server_id_bits= 0;
ulong opt_server_id_mask= 0;
my_bool read_only= 0, opt_readonly= 0;
my_bool super_read_only= 0, opt_super_readonly= 0;
my_bool use_temp_pool, relay_log_purge;
my_bool relay_log_recovery;
my_bool opt_sync_frm, opt_allow_suspicious_udfs;
my_bool opt_secure_auth= 0;
char* opt_secure_file_priv= NULL;
my_bool opt_secure_file_priv_noarg= FALSE;
my_bool lower_case_file_system= 1;
my_bool opt_myisam_use_mmap= 0;
uint opt_large_page_size= 0;
#if defined(ENABLED_DEBUG_SYNC)
MYSQL_PLUGIN_IMPORT uint opt_debug_sync_timeout= 0;
#endif /* defined(ENABLED_DEBUG_SYNC) */
my_bool opt_userstat= 0, opt_thread_statistics= 0;
/*
True if there is at least one per-hour limit for some user, so we should
check them before each query (and possibly reset counters when hour is
changed). False otherwise.
*/
volatile bool mqh_used = 0;
my_bool opt_noacl= 0;
#ifdef HAVE_INITGROUPS
volatile sig_atomic_t calling_initgroups= 0; /**< Used in SIGSEGV handler. */
#endif
uint mysqld_port, test_flags, select_errors, ha_open_options;
uint mysqld_extra_port;
uint mysqld_port_timeout;
ulong delay_key_write_options;
uint lower_case_table_names;
ulong tc_heuristic_recover= 0;
int32 num_thread_running;
ulong what_to_log;
ulong slow_launch_time;
ulong open_files_limit;
ulonglong opt_mts_pending_jobs_size_max;
ulong refresh_version; /* Increments on each reload */
ulong specialflag=0;
ulonglong denied_connections= 0;
Error_log_throttle err_log_throttle(Log_throttle::LOG_THROTTLE_WINDOW_SIZE,
sql_print_error,
"Error log throttle: %10lu 'Can't create"
" thread to handle new connection'"
" error(s) suppressed");
/**
Limit of the total number of prepared statements in the server.
Is necessary to protect the server against out-of-memory attacks.
*/
ulong max_prepared_stmt_count;
/**
Current total number of prepared statements in the server. This number
is exact, and therefore may not be equal to the difference between
`com_stmt_prepare' and `com_stmt_close' (global status variables), as
the latter ones account for all registered attempts to prepare
a statement (including unsuccessful ones). Prepared statements are
currently connection-local: if the same SQL query text is prepared in
two different connections, this counts as two distinct prepared
statements.
*/
ulong prepared_stmt_count=0;
ulong thread_id=1L,current_pid;
ulong slow_launch_threads = 0;
uint opt_mts_checkpoint_period, opt_mts_checkpoint_group;
ulong expire_logs_days = 0;
/**
Soft upper limit for number of sp_head objects that can be stored
in the sp_cache for one connection.
*/
ulong stored_program_cache_size= 0;
const double log_10[] = {
1e000, 1e001, 1e002, 1e003, 1e004, 1e005, 1e006, 1e007, 1e008, 1e009,
1e010, 1e011, 1e012, 1e013, 1e014, 1e015, 1e016, 1e017, 1e018, 1e019,
1e020, 1e021, 1e022, 1e023, 1e024, 1e025, 1e026, 1e027, 1e028, 1e029,
1e030, 1e031, 1e032, 1e033, 1e034, 1e035, 1e036, 1e037, 1e038, 1e039,
1e040, 1e041, 1e042, 1e043, 1e044, 1e045, 1e046, 1e047, 1e048, 1e049,
1e050, 1e051, 1e052, 1e053, 1e054, 1e055, 1e056, 1e057, 1e058, 1e059,
1e060, 1e061, 1e062, 1e063, 1e064, 1e065, 1e066, 1e067, 1e068, 1e069,
1e070, 1e071, 1e072, 1e073, 1e074, 1e075, 1e076, 1e077, 1e078, 1e079,
1e080, 1e081, 1e082, 1e083, 1e084, 1e085, 1e086, 1e087, 1e088, 1e089,
1e090, 1e091, 1e092, 1e093, 1e094, 1e095, 1e096, 1e097, 1e098, 1e099,
1e100, 1e101, 1e102, 1e103, 1e104, 1e105, 1e106, 1e107, 1e108, 1e109,
1e110, 1e111, 1e112, 1e113, 1e114, 1e115, 1e116, 1e117, 1e118, 1e119,
1e120, 1e121, 1e122, 1e123, 1e124, 1e125, 1e126, 1e127, 1e128, 1e129,
1e130, 1e131, 1e132, 1e133, 1e134, 1e135, 1e136, 1e137, 1e138, 1e139,
1e140, 1e141, 1e142, 1e143, 1e144, 1e145, 1e146, 1e147, 1e148, 1e149,
1e150, 1e151, 1e152, 1e153, 1e154, 1e155, 1e156, 1e157, 1e158, 1e159,
1e160, 1e161, 1e162, 1e163, 1e164, 1e165, 1e166, 1e167, 1e168, 1e169,
1e170, 1e171, 1e172, 1e173, 1e174, 1e175, 1e176, 1e177, 1e178, 1e179,
1e180, 1e181, 1e182, 1e183, 1e184, 1e185, 1e186, 1e187, 1e188, 1e189,
1e190, 1e191, 1e192, 1e193, 1e194, 1e195, 1e196, 1e197, 1e198, 1e199,
1e200, 1e201, 1e202, 1e203, 1e204, 1e205, 1e206, 1e207, 1e208, 1e209,
1e210, 1e211, 1e212, 1e213, 1e214, 1e215, 1e216, 1e217, 1e218, 1e219,
1e220, 1e221, 1e222, 1e223, 1e224, 1e225, 1e226, 1e227, 1e228, 1e229,
1e230, 1e231, 1e232, 1e233, 1e234, 1e235, 1e236, 1e237, 1e238, 1e239,
1e240, 1e241, 1e242, 1e243, 1e244, 1e245, 1e246, 1e247, 1e248, 1e249,
1e250, 1e251, 1e252, 1e253, 1e254, 1e255, 1e256, 1e257, 1e258, 1e259,
1e260, 1e261, 1e262, 1e263, 1e264, 1e265, 1e266, 1e267, 1e268, 1e269,
1e270, 1e271, 1e272, 1e273, 1e274, 1e275, 1e276, 1e277, 1e278, 1e279,
1e280, 1e281, 1e282, 1e283, 1e284, 1e285, 1e286, 1e287, 1e288, 1e289,
1e290, 1e291, 1e292, 1e293, 1e294, 1e295, 1e296, 1e297, 1e298, 1e299,
1e300, 1e301, 1e302, 1e303, 1e304, 1e305, 1e306, 1e307, 1e308
};
time_t server_start_time, flush_status_time;
char mysql_home[FN_REFLEN], pidfile_name[FN_REFLEN], system_time_zone[30];
char default_logfile_name[FN_REFLEN];
char *default_tz_name;
char log_error_file[FN_REFLEN], glob_hostname[FN_REFLEN];
char mysql_real_data_home[FN_REFLEN],
lc_messages_dir[FN_REFLEN], reg_ext[FN_EXTLEN],
mysql_charsets_dir[FN_REFLEN],
*opt_init_file, *opt_tc_log_file;
char *lc_messages_dir_ptr;
char mysql_unpacked_real_data_home[FN_REFLEN];
int mysql_unpacked_real_data_home_len;
uint mysql_real_data_home_len, mysql_data_home_len= 1;
uint reg_ext_length;
char logname_path[FN_REFLEN];
char secure_file_real_path[FN_REFLEN];
DATE_TIME_FORMAT global_date_format, global_datetime_format, global_time_format;
Time_zone *default_tz;
char *mysql_data_home= const_cast<char*>(".");
const char *mysql_real_data_home_ptr= mysql_real_data_home;
char server_version[SERVER_VERSION_LENGTH];
char *mysqld_unix_port, *opt_mysql_tmpdir;
ulong thread_handling;
/** name of reference on left expression in rewritten IN subquery */
const char *in_left_expr_name= "<left expr>";
/** name of additional condition */
const char *in_additional_cond= "<IN COND>";
const char *in_having_cond= "<IN HAVING>";
my_decimal decimal_zero;
/** Number of connection errors when selecting on the listening port */
ulong connection_errors_select= 0;
/** Number of connection errors when accepting sockets in the listening port. */
ulong connection_errors_accept= 0;
/** Number of connection errors from TCP wrappers. */
ulong connection_errors_tcpwrap= 0;
/** Number of connection errors from internal server errors. */
ulong connection_errors_internal= 0;
/** Number of connection errors from the server max_connection limit. */
ulong connection_errors_max_connection= 0;
/** Number of errors when reading the peer address. */
ulong connection_errors_peer_addr= 0;
/* classes for comparation parsing/processing */
Eq_creator eq_creator;
Ne_creator ne_creator;
Gt_creator gt_creator;
Lt_creator lt_creator;
Ge_creator ge_creator;
Le_creator le_creator;
MYSQL_FILE *bootstrap_file;
int bootstrap_error;
struct system_variables global_system_variables;
struct system_variables max_system_variables;
MY_TMPDIR mysql_tmpdir_list;
MY_BITMAP temp_pool;
CHARSET_INFO *system_charset_info, *files_charset_info ;
CHARSET_INFO *national_charset_info, *table_alias_charset;
CHARSET_INFO *character_set_filesystem;
CHARSET_INFO *error_message_charset_info;
MY_LOCALE *my_default_lc_messages;
MY_LOCALE *my_default_lc_time_names;
SHOW_COMP_OPTION have_ssl, have_symlink, have_dlopen, have_query_cache;
SHOW_COMP_OPTION have_geometry, have_rtree_keys;
SHOW_COMP_OPTION have_crypt, have_compress;
SHOW_COMP_OPTION have_profiling;
SHOW_COMP_OPTION have_backup_locks;
SHOW_COMP_OPTION have_snapshot_cloning;
ulonglong opt_log_warnings_suppress= 0;
char* enforce_storage_engine= NULL;
char* utility_user= NULL;
char* utility_user_password= NULL;
char* utility_user_schema_access= NULL;
/* Plucking this from sql/sql_acl.cc for an array of privilege names */
extern TYPELIB utility_user_privileges_typelib;
ulonglong utility_user_privileges= 0;
SHOW_COMP_OPTION have_statement_timeout= SHOW_OPTION_DISABLED;
/* Thread specific variables */
pthread_key(MEM_ROOT**,THR_MALLOC);
pthread_key(THD*, THR_THD);
mysql_mutex_t LOCK_thread_created;
mysql_mutex_t LOCK_thread_count, LOCK_thd_remove;
mysql_mutex_t
LOCK_status, LOCK_error_log, LOCK_uuid_generator,
LOCK_delayed_insert, LOCK_delayed_status, LOCK_delayed_create,
LOCK_crypt,
LOCK_global_system_variables,
LOCK_user_conn, LOCK_slave_list, LOCK_active_mi,
LOCK_connection_count, LOCK_error_messages;
mysql_mutex_t LOCK_sql_rand;
mysql_mutex_t
LOCK_stats, LOCK_global_user_client_stats,
LOCK_global_table_stats, LOCK_global_index_stats;
/**
The below lock protects access to two global server variables:
max_prepared_stmt_count and prepared_stmt_count. These variables
set the limit and hold the current total number of prepared statements
in the server, respectively. As PREPARE/DEALLOCATE rate in a loaded
server may be fairly high, we need a dedicated lock.
*/
mysql_mutex_t LOCK_prepared_stmt_count;
/*
The below two locks are introudced as guards (second mutex) for
the global variables sql_slave_skip_counter and slave_net_timeout
respectively. See fix_slave_skip_counter/fix_slave_net_timeout
for more details
*/
mysql_mutex_t LOCK_sql_slave_skip_counter;
mysql_mutex_t LOCK_slave_net_timeout;
mysql_mutex_t LOCK_log_throttle_qni;
#ifdef HAVE_OPENSSL
mysql_mutex_t LOCK_des_key_file;
#endif
mysql_rwlock_t LOCK_grant, LOCK_sys_init_connect, LOCK_sys_init_slave;
mysql_rwlock_t LOCK_system_variables_hash;
mysql_cond_t COND_thread_count;
pthread_t signal_thread;
pthread_attr_t connection_attrib;
mysql_mutex_t LOCK_server_started;
mysql_rwlock_t LOCK_consistent_snapshot;
int mysqld_server_started= 0;
File_parser_dummy_hook file_parser_dummy_hook;
/* replication parameters, if master_host is not NULL, we are a slave */
uint report_port= 0;
ulong master_retry_count=0;
char *master_info_file;
char *relay_log_info_file, *report_user, *report_password, *report_host;
char *opt_relay_logname = 0, *opt_relaylog_index_name=0;
char *opt_logname, *opt_slow_logname, *opt_bin_logname;
/* Static variables */
static volatile sig_atomic_t kill_in_progress;
static my_bool opt_myisam_log;
static int cleanup_done;
static ulong opt_specialflag;
static char *opt_update_logname;
char *opt_binlog_index_name;
char *mysql_home_ptr, *pidfile_name_ptr;
/**
Initial command line arguments (arguments), after load_defaults().
This memory is allocated by @c load_defaults() and should be freed
using @c free_defaults().
Do not modify defaults_argc / defaults_argv,
use remaining_argc / remaining_argv instead to parse the command
line arguments in multiple steps.
*/
static char **defaults_argv;
/** Remaining command line arguments (count), filtered by handle_options().*/
static int remaining_argc;
/** Remaining command line arguments (arguments), filtered by handle_options().*/
static char **remaining_argv;
int orig_argc;
char **orig_argv;
THD *thd;
#if defined(HAVE_OPENSSL) && !defined(HAVE_YASSL)
bool init_rsa_keys(void);
void deinit_rsa_keys(void);
int show_rsa_public_key(THD *thd, SHOW_VAR *var, char *buff);
#endif
static volatile sig_atomic_t global_thread_count= 0;
static std::set<THD*> *global_thread_list= NULL;
static ulong blocked_pthread_count= 0;
static std::list<THD*> *waiting_thd_list= NULL;
/*
global_thread_list and waiting_thd_list are both pointers to objects
on the heap, to avoid potential problems with running destructors atexit().
*/
static void delete_global_thread_list()
{
delete global_thread_list;
delete waiting_thd_list;
global_thread_list= NULL;
waiting_thd_list= NULL;
}
Thread_iterator global_thread_list_begin()
{
mysql_mutex_assert_owner(&LOCK_thread_count);
return global_thread_list->begin();
}
Thread_iterator global_thread_list_end()
{
mysql_mutex_assert_owner(&LOCK_thread_count);
return global_thread_list->end();
}
void copy_global_thread_list(std::set<THD*> *new_copy)
{
mysql_mutex_assert_owner(&LOCK_thd_remove);
mysql_mutex_lock(&LOCK_thread_count);
*new_copy= *global_thread_list;
mysql_mutex_unlock(&LOCK_thread_count);
}
void add_global_thread(THD *thd)
{
DBUG_PRINT("info", ("add_global_thread %p", thd));
mysql_mutex_assert_owner(&LOCK_thread_count);
const bool have_thread=
global_thread_list->find(thd) != global_thread_list->end();
if (!have_thread)
{
++global_thread_count;
global_thread_list->insert(thd);
}
// Adding the same THD twice is an error.
DBUG_ASSERT(!have_thread);
}
void remove_global_thread(THD *thd)
{
DBUG_PRINT("info", ("remove_global_thread %p",
thd));
mysql_mutex_lock(&LOCK_thd_remove);
mysql_mutex_lock(&LOCK_thread_count);
DBUG_ASSERT(thd->release_resources_done());
/*
Used by binlog_reset_master. It would be cleaner to use
DEBUG_SYNC here, but that's not possible because the THD's debug
sync feature has been shut down at this point.
*/
DBUG_EXECUTE_IF("sleep_after_lock_thread_count_before_delete_thd",
sleep(5););
const size_t num_erased= global_thread_list->erase(thd);
if (num_erased == 1)
--global_thread_count;
// Removing a THD that was never added is an error.
DBUG_ASSERT(1 == num_erased);
mysql_mutex_unlock(&LOCK_thd_remove);
mysql_cond_broadcast(&COND_thread_count);
mysql_mutex_unlock(&LOCK_thread_count);
}
uint get_thread_count()
{
return (uint) global_thread_count;
}
/*
Multiple threads of execution use the random state maintained in global
sql_rand to generate random numbers. sql_rnd_with_mutex use mutex
LOCK_sql_rand to protect sql_rand across multiple instantiations that use
sql_rand to generate random numbers.
*/
ulong sql_rnd_with_mutex()
{
mysql_mutex_lock(&LOCK_sql_rand);
ulong tmp=(ulong) (my_rnd(&sql_rand) * 0xffffffff); /* make all bits random */
mysql_mutex_unlock(&LOCK_sql_rand);
return tmp;
}
#ifdef HAVE_PSI_STATEMENT_INTERFACE
PSI_statement_info stmt_info_new_packet;
#endif
/**
A log message for the error log, buffered in memory.
Log messages are temporarily buffered when generated before the error log
is initialized, and then printed once the error log is ready.
*/
class Buffered_log : public Sql_alloc
{
public:
Buffered_log(enum loglevel level, const char *message);
~Buffered_log()
{}
void print(void);
private:
/** Log message level. */
enum loglevel m_level;
/** Log message text. */
String m_message;
};
/**
Constructor.
@param level the message log level
@param message the message text
*/
Buffered_log::Buffered_log(enum loglevel level, const char *message)
: m_level(level), m_message()
{
m_message.copy(message, strlen(message), &my_charset_latin1);
}
/**
Print a buffered log to the real log file.
*/
void Buffered_log::print()
{
/*
Since messages are buffered, they can be printed out
of order with other entries in the log.
Add "Buffered xxx" to the message text to prevent confusion.
*/
switch(m_level)
{
case ERROR_LEVEL:
sql_print_error("Buffered error: %s\n", m_message.c_ptr_safe());
break;
case WARNING_LEVEL:
sql_print_warning("Buffered warning: %s\n", m_message.c_ptr_safe());
break;
case INFORMATION_LEVEL:
/*
Messages printed as "information" still end up in the mysqld *error* log,
but with a [Note] tag instead of an [ERROR] tag.
While this is probably fine for a human reading the log,
it is upsetting existing automated scripts used to parse logs,
because such scripts are likely to not already handle [Note] properly.
INFORMATION_LEVEL messages are simply silenced, on purpose,
to avoid un needed verbosity.
*/
break;
}
}
/**
Collection of all the buffered log messages.
*/
class Buffered_logs
{
public:
Buffered_logs()
{}
~Buffered_logs()
{}
void init();
void cleanup();
void buffer(enum loglevel m_level, const char *msg);
void print();
private:
/**
Memory root to use to store buffered logs.
This memory root lifespan is between init and cleanup.
Once the buffered logs are printed, they are not needed anymore,
and all the memory used is reclaimed.
*/
MEM_ROOT m_root;
/** List of buffered log messages. */
List<Buffered_log> m_list;
};
void Buffered_logs::init()
{
init_alloc_root(&m_root, 1024, 0);
}
void Buffered_logs::cleanup()
{
m_list.delete_elements();
free_root(&m_root, MYF(0));
}
/**
Add a log message to the buffer.
*/
void Buffered_logs::buffer(enum loglevel level, const char *msg)
{
/*
Do not let Sql_alloc::operator new(size_t) allocate memory,
there is no memory root associated with the main() thread.
Give explicitly the proper memory root to use to
Sql_alloc::operator new(size_t, MEM_ROOT *) instead.
*/
Buffered_log *log= new (&m_root) Buffered_log(level, msg);
if (log)
m_list.push_back(log, &m_root);
}
/**
Print buffered log messages.
*/
void Buffered_logs::print()
{
Buffered_log *log;
List_iterator_fast<Buffered_log> it(m_list);
while ((log= it++))
log->print();
}
/** Logs reported before a logger is available. */
static Buffered_logs buffered_logs;
/**
Error reporter that buffer log messages.
@param level log message level
@param format log message format string
*/
C_MODE_START
static void buffered_option_error_reporter(enum loglevel level,
const char *format, ...)
{
va_list args;
char buffer[1024];
va_start(args, format);
my_vsnprintf(buffer, sizeof(buffer), format, args);
va_end(args);
buffered_logs.buffer(level, buffer);
}
/**
Character set and collation error reporter that prints to sql error log.
@param level log message level
@param format log message format string
This routine is used to print character set and collation
warnings and errors inside an already running mysqld server,
e.g. when a character set or collation is requested for the very first time
and its initialization does not go well for some reasons.
Note: At early mysqld initialization stage,
when error log is not yet available,
we use buffered_option_error_reporter() instead,
to print general character set subsystem initialization errors,
such as Index.xml syntax problems, bad XML tag hierarchy, etc.
*/
static void charset_error_reporter(enum loglevel level,
const char *format, ...)
{
va_list args;
va_start(args, format);
vprint_msg_to_log(level, format, args);
va_end(args);
}
C_MODE_END