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restored run-time thread lib detection

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sql/stacktrace.c:
  removed code duplication
sql/stacktrace.h:
  removed code duplication
This commit is contained in:
unknown 2007-03-28 16:23:44 +02:00
parent a79e08a6e1
commit 8f93150d20
8 changed files with 81 additions and 64 deletions
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9
include/my_pthread.h
View File

@ -701,6 +701,15 @@ extern uint my_thread_end_wait_time;
Keep track of shutdown,signal, and main threads so that my_end() will not
report errors with them
*/
/* Which kind of thread library is in use */
#define THD_LIB_OTHER 1
#define THD_LIB_NPTL 2
#define THD_LIB_LT 4
extern uint thd_lib_detected;
/* statistics_xxx functions are for not essential statistic */
#ifndef thread_safe_increment

8
include/thr_alarm.h
View File

@ -24,11 +24,6 @@ extern "C" {
#ifndef USE_ALARM_THREAD
#define USE_ONE_SIGNAL_HAND /* One must call process_alarm */
#endif
#ifdef HAVE_LINUXTHREADS
#define THR_CLIENT_ALARM SIGALRM
#else
#define THR_CLIENT_ALARM SIGUSR1
#endif
#ifdef HAVE_rts_threads
#undef USE_ONE_SIGNAL_HAND
#define USE_ALARM_THREAD
@ -90,6 +85,9 @@ typedef struct st_alarm {
my_bool malloced;
} ALARM;
extern uint thr_client_alarm;
extern pthread_t alarm_thread;
#define thr_alarm_init(A) (*(A))=0
#define thr_alarm_in_use(A) (*(A)!= 0)
void init_thr_alarm(uint max_alarm);

10
mysys/my_pthread.c
View File

@ -31,6 +31,8 @@
uint thd_lib_detected= 0;
uint thd_lib_detected;
#ifndef my_pthread_setprio
void my_pthread_setprio(pthread_t thread_id,int prior)
{
@ -51,8 +53,6 @@ int my_pthread_getprio(pthread_t thread_id)
int policy;
if (!pthread_getschedparam(thread_id,&policy,&tmp_sched_param))
{
DBUG_PRINT("thread",("policy: %d priority: %d",
policy,tmp_sched_param.sched_priority));
return tmp_sched_param.sched_priority;
}
#endif
@ -314,8 +314,6 @@ void sigwait_handle_sig(int sig)
pthread_mutex_unlock(&LOCK_sigwait);
}
extern pthread_t alarm_thread;
void *sigwait_thread(void *set_arg)
{
sigset_t *set=(sigset_t*) set_arg;
@ -334,7 +332,9 @@ void *sigwait_thread(void *set_arg)
sigaction(i, &sact, (struct sigaction*) 0);
}
}
sigaddset(set,THR_CLIENT_ALARM);
/* Ensure that init_thr_alarm() is called */
DBUG_ASSERT(thr_client_alarm);
sigaddset(set, thr_client_alarm);
pthread_sigmask(SIG_UNBLOCK,(sigset_t*) set,(sigset_t*) 0);
alarm_thread=pthread_self(); /* For thr_alarm */

21
mysys/my_thr_init.c
View File

@ -20,6 +20,7 @@
#include "mysys_priv.h"
#include <m_string.h>
#include <signal.h>
#ifdef THREAD
#ifdef USE_TLS
@ -63,6 +64,8 @@ nptl_pthread_exit_hack_handler(void *arg __attribute((unused)))
#endif
static uint get_thread_lib(void);
/*
initialize thread environment
@ -76,6 +79,8 @@ nptl_pthread_exit_hack_handler(void *arg __attribute((unused)))
my_bool my_thread_global_init(void)
{
thd_lib_detected= get_thread_lib();
if (pthread_key_create(&THR_KEY_mysys,0))
{
fprintf(stderr,"Can't initialize threads: error %d\n",errno);
@ -395,4 +400,20 @@ const char *my_thread_name(void)
}
#endif /* DBUG_OFF */
static uint get_thread_lib(void)
{
char buff[64];
#ifdef _CS_GNU_LIBPTHREAD_VERSION
confstr(_CS_GNU_LIBPTHREAD_VERSION, buff, sizeof(buff));
if (!strncasecmp(buff, "NPTL", 4))
return THD_LIB_NPTL;
if (!strncasecmp(buff, "linuxthreads", 12))
return THD_LIB_LT;
#endif
return THD_LIB_OTHER;
}
#endif /* THREAD */

44
mysys/thr_alarm.c
View File

@ -34,6 +34,7 @@
#define ETIME ETIMEDOUT
#endif
uint thr_client_alarm;
static int alarm_aborted=1; /* No alarm thread */
my_bool thr_alarm_inited= 0;
volatile my_bool alarm_thread_running= 0;
@ -56,9 +57,7 @@ static void *alarm_handler(void *arg);
#define reschedule_alarms() pthread_kill(alarm_thread,THR_SERVER_ALARM)
#endif
#if THR_CLIENT_ALARM != SIGALRM || defined(USE_ALARM_THREAD)
static sig_handler thread_alarm(int sig __attribute__((unused)));
#endif
static int compare_ulong(void *not_used __attribute__((unused)),
byte *a_ptr,byte* b_ptr)
@ -77,9 +76,13 @@ void init_thr_alarm(uint max_alarms)
sigfillset(&full_signal_set); /* Neaded to block signals */
pthread_mutex_init(&LOCK_alarm,MY_MUTEX_INIT_FAST);
pthread_cond_init(&COND_alarm,NULL);
#if THR_CLIENT_ALARM != SIGALRM || defined(USE_ALARM_THREAD)
my_sigset(THR_CLIENT_ALARM,thread_alarm);
thr_client_alarm= thd_lib_detected == THD_LIB_LT ? SIGALRM : SIGUSR1;
#ifndef USE_ALARM_THREAD
if (thd_lib_detected != THD_LIB_LT)
#endif
{
my_sigset(thr_client_alarm, thread_alarm);
}
sigemptyset(&s);
sigaddset(&s, THR_SERVER_ALARM);
alarm_thread=pthread_self();
@ -97,10 +100,11 @@ void init_thr_alarm(uint max_alarms)
}
#elif defined(USE_ONE_SIGNAL_HAND)
pthread_sigmask(SIG_BLOCK, &s, NULL); /* used with sigwait() */
#if THR_SERVER_ALARM == THR_CLIENT_ALARM
my_sigset(THR_CLIENT_ALARM,process_alarm); /* Linuxthreads */
pthread_sigmask(SIG_UNBLOCK, &s, NULL);
#endif
if (thd_lib_detected == THD_LIB_LT)
{
my_sigset(thr_client_alarm, process_alarm); /* Linuxthreads */
pthread_sigmask(SIG_UNBLOCK, &s, NULL);
}
#else
my_sigset(THR_SERVER_ALARM, process_alarm);
pthread_sigmask(SIG_UNBLOCK, &s, NULL);
@ -152,7 +156,7 @@ my_bool thr_alarm(thr_alarm_t *alrm, uint sec, ALARM *alarm_data)
now=(ulong) time((time_t*) 0);
pthread_sigmask(SIG_BLOCK,&full_signal_set,&old_mask);
pthread_mutex_lock(&LOCK_alarm); /* Lock from threads & alarms */
pthread_mutex_lock(&LOCK_alarm); /* Lock from threads & alarms */
if (alarm_aborted > 0)
{ /* No signal thread */
DBUG_PRINT("info", ("alarm aborted"));
@ -273,18 +277,17 @@ sig_handler process_alarm(int sig __attribute__((unused)))
This must be first as we can't call DBUG inside an alarm for a normal thread
*/
#if THR_SERVER_ALARM == THR_CLIENT_ALARM
if (!pthread_equal(pthread_self(),alarm_thread))
if (thd_lib_detected == THD_LIB_LT &&
!pthread_equal(pthread_self(),alarm_thread))
{
#if defined(MAIN) && !defined(__bsdi__)
printf("thread_alarm in process_alarm\n"); fflush(stdout);
#endif
#ifdef DONT_REMEMBER_SIGNAL
my_sigset(THR_CLIENT_ALARM,process_alarm); /* int. thread system calls */
my_sigset(thr_client_alarm, process_alarm); /* int. thread system calls */
#endif
return;
}
#endif
/*
We have to do do the handling of the alarm in a sub function,
@ -328,7 +331,7 @@ static sig_handler process_alarm_part2(int sig __attribute__((unused)))
alarm_data=(ALARM*) queue_element(&alarm_queue,i);
alarm_data->alarmed=1; /* Info to thread */
if (pthread_equal(alarm_data->thread,alarm_thread) ||
pthread_kill(alarm_data->thread, THR_CLIENT_ALARM))
pthread_kill(alarm_data->thread, thr_client_alarm))
{
#ifdef MAIN
printf("Warning: pthread_kill couldn't find thread!!!\n");
@ -352,7 +355,7 @@ static sig_handler process_alarm_part2(int sig __attribute__((unused)))
alarm_data->alarmed=1; /* Info to thread */
DBUG_PRINT("info",("sending signal to waiting thread"));
if (pthread_equal(alarm_data->thread,alarm_thread) ||
pthread_kill(alarm_data->thread, THR_CLIENT_ALARM))
pthread_kill(alarm_data->thread, thr_client_alarm))
{
#ifdef MAIN
printf("Warning: pthread_kill couldn't find thread!!!\n");
@ -488,7 +491,7 @@ void thr_alarm_info(ALARM_INFO *info)
ARGSUSED
*/
#if THR_CLIENT_ALARM != SIGALRM || defined(USE_ALARM_THREAD)
static sig_handler thread_alarm(int sig)
{
#ifdef MAIN
@ -498,7 +501,6 @@ static sig_handler thread_alarm(int sig)
my_sigset(sig,thread_alarm); /* int. thread system calls */
#endif
}
#endif
#ifdef HAVE_TIMESPEC_TS_SEC
@ -784,9 +786,7 @@ static void *signal_hand(void *arg __attribute__((unused)))
sigaddset(&set,SIGINT);
sigaddset(&set,SIGQUIT);
sigaddset(&set,SIGTERM);
#if THR_CLIENT_ALARM != SIGHUP
sigaddset(&set,SIGHUP);
#endif
#ifdef SIGTSTP
sigaddset(&set,SIGTSTP);
#endif
@ -797,7 +797,7 @@ static void *signal_hand(void *arg __attribute__((unused)))
puts("Starting signal handling thread");
#endif
printf("server alarm: %d thread alarm: %d\n",
THR_SERVER_ALARM,THR_CLIENT_ALARM);
THR_SERVER_ALARM, thr_client_alarm);
DBUG_PRINT("info",("Starting signal and alarm handling thread"));
for(;;)
{
@ -865,11 +865,11 @@ int main(int argc __attribute__((unused)),char **argv __attribute__((unused)))
sigaddset(&set,SIGTSTP);
#endif
sigaddset(&set,THR_SERVER_ALARM);
sigdelset(&set,THR_CLIENT_ALARM);
sigdelset(&set, thr_client_alarm);
(void) pthread_sigmask(SIG_SETMASK,&set,NULL);
#ifdef NOT_USED
sigemptyset(&set);
sigaddset(&set,THR_CLIENT_ALARM);
sigaddset(&set, thr_client_alarm);
VOID(pthread_sigmask(SIG_UNBLOCK, &set, (sigset_t*) 0));
#endif

34
sql/mysqld.cc
View File

@ -195,12 +195,6 @@ inline void reset_floating_point_exceptions()
} /* cplusplus */
#if defined(HAVE_LINUXTHREADS)
#define THR_KILL_SIGNAL SIGINT
#else
#define THR_KILL_SIGNAL SIGUSR2 // Can't use this with LinuxThreads
#endif
#define MYSQL_KILL_SIGNAL SIGTERM
#ifdef HAVE_GLIBC2_STYLE_GETHOSTBYNAME_R
@ -605,6 +599,7 @@ pthread_mutex_t LOCK_server_started;
pthread_cond_t COND_server_started;
int mysqld_server_started= 0;
static uint thr_kill_signal;
File_parser_dummy_hook file_parser_dummy_hook;
@ -788,7 +783,7 @@ static void close_connections(void)
DBUG_PRINT("info",("Waiting for select thread"));
#ifndef DONT_USE_THR_ALARM
if (pthread_kill(select_thread,THR_CLIENT_ALARM))
if (pthread_kill(select_thread, thr_client_alarm))
break; // allready dead
#endif
set_timespec(abstime, 2);
@ -2294,7 +2289,9 @@ static void init_signals(void)
DBUG_ENTER("init_signals");
if (test_flags & TEST_SIGINT)
my_sigset(THR_KILL_SIGNAL,end_thread_signal);
{
my_sigset(thr_kill_signal, end_thread_signal);
}
my_sigset(THR_SERVER_ALARM,print_signal_warning); // Should never be called!
if (!(test_flags & TEST_NO_STACKTRACE) || (test_flags & TEST_CORE_ON_SIGNAL))
@ -2351,8 +2348,12 @@ static void init_signals(void)
#endif
sigaddset(&set,THR_SERVER_ALARM);
if (test_flags & TEST_SIGINT)
sigdelset(&set,THR_KILL_SIGNAL); // May be SIGINT
sigdelset(&set,THR_CLIENT_ALARM); // For alarms
{
// May be SIGINT
sigdelset(&set, thr_kill_signal);
}
// For alarms
sigdelset(&set, thr_client_alarm);
sigprocmask(SIG_SETMASK,&set,NULL);
pthread_sigmask(SIG_SETMASK,&set,NULL);
DBUG_VOID_RETURN;
@ -2415,23 +2416,19 @@ pthread_handler_t signal_hand(void *arg __attribute__((unused)))
*/
init_thr_alarm(thread_scheduler.max_threads +
global_system_variables.max_insert_delayed_threads + 10);
#if SIGINT != THR_KILL_SIGNAL
if (test_flags & TEST_SIGINT)
if (thd_lib_detected != THD_LIB_LT && (test_flags & TEST_SIGINT))
{
(void) sigemptyset(&set); // Setup up SIGINT for debug
(void) sigaddset(&set,SIGINT); // For debugging
(void) pthread_sigmask(SIG_UNBLOCK,&set,NULL);
}
#endif
(void) sigemptyset(&set); // Setup up SIGINT for debug
#ifdef USE_ONE_SIGNAL_HAND
(void) sigaddset(&set,THR_SERVER_ALARM); // For alarms
#endif
#ifndef IGNORE_SIGHUP_SIGQUIT
(void) sigaddset(&set,SIGQUIT);
#if THR_CLIENT_ALARM != SIGHUP
(void) sigaddset(&set,SIGHUP);
#endif
#endif
(void) sigaddset(&set,SIGTERM);
(void) sigaddset(&set,SIGTSTP);
@ -3626,6 +3623,13 @@ int main(int argc, char **argv)
MY_INIT(argv[0]); // init my_sys library & pthreads
/* nothing should come before this line ^^^ */
/* Set signal used to kill MySQL */
#if defined(SIGUSR2)
thr_kill_signal= thd_lib_detected == THD_LIB_LT ? SIGINT : SIGUSR2;
#else
thr_kill_signal= SIGINT;
#endif
/*
Perform basic logger initialization logger. Should be called after
MY_INIT, as it initializes mutexes. Log tables are inited later.

15
sql/stacktrace.c
View File

@ -55,19 +55,6 @@ void safe_print_str(const char* name, const char* val, int max_len)
static my_bool is_nptl;
/* Check if we are using NPTL or LinuxThreads on Linux */
void check_thread_lib(void)
{
char buf[5];
#ifdef _CS_GNU_LIBPTHREAD_VERSION
confstr(_CS_GNU_LIBPTHREAD_VERSION, buf, sizeof(buf));
is_nptl = !strncasecmp(buf, "NPTL", sizeof(buf));
#else
is_nptl = 0;
#endif
}
#if defined(__alpha__) && defined(__GNUC__)
/*
The only way to backtrace without a symbol table on alpha
@ -173,7 +160,7 @@ terribly wrong...\n");
#endif /* __alpha__ */
/* We are 1 frame above signal frame with NPTL and 2 frames above with LT */
sigreturn_frame_count = is_nptl ? 1 : 2;
sigreturn_frame_count = thd_lib_detected == THD_LIB_LT ? 2 : 1;
while (fp < (uchar**) stack_bottom)
{

2
sql/stacktrace.h
View File

@ -27,11 +27,9 @@ extern char* heap_start;
#define init_stacktrace() do { \
heap_start = (char*) &__bss_start; \
check_thread_lib(); \
} while(0);
void print_stacktrace(gptr stack_bottom, ulong thread_stack);
void safe_print_str(const char* name, const char* val, int max_len);
void check_thread_lib(void);
#endif /* (defined (__i386__) || (defined(__alpha__) && defined(__GNUC__))) */
#endif /* TARGET_OS_LINUX */