用于EagleEye3.0 规则集漏报和误报测试的示例项目,项目收集于github和gitee
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/* Copyright (c) 2006, 2019, 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, version 2.0,
as published by the Free Software Foundation.
This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.
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, version 2.0, 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 "sql/event_scheduler.h"
#include <stdio.h>
#include <string.h>
#include "lex_string.h"
#include "m_ctype.h"
#include "m_string.h"
#include "my_command.h"
#include "my_dbug.h"
#include "my_loglevel.h"
#include "my_psi_config.h"
#include "my_sys.h"
#include "my_thread.h"
#include "mysql/components/services/log_builtins.h"
#include "mysql/components/services/psi_statement_bits.h"
#include "mysql/psi/mysql_cond.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/psi/mysql_statement.h"
#include "mysql/psi/mysql_thread.h"
#include "mysql/service_mysql_alloc.h"
#include "mysql/thread_type.h"
#include "mysql_com.h"
#include "mysqld_error.h"
#include "sql/auth/auth_acls.h"
#include "sql/auth/sql_security_ctx.h"
#include "sql/current_thd.h"
#include "sql/dd/dd_schema.h" // dd::Schema_MDL_locker
#include "sql/dd/types/event.h"
#include "sql/event_data_objects.h"
#include "sql/event_db_repository.h"
#include "sql/event_queue.h"
#include "sql/events.h"
#include "sql/log.h"
#include "sql/mdl.h"
#include "sql/mysqld.h" // my_localhost slave_net_timeout
#include "sql/mysqld_thd_manager.h" // Global_THD_manager
#include "sql/protocol_classic.h"
#include "sql/psi_memory_key.h"
#include "sql/query_options.h"
#include "sql/sql_class.h" // THD
#include "sql/sql_const.h"
#include "sql/sql_error.h" // Sql_condition
#include "sql/system_variables.h"
#include "sql_string.h"
#include "thr_mutex.h"
/**
@addtogroup Event_Scheduler
@{
*/
#define LOCK_DATA() lock_data(__func__, __LINE__)
#define UNLOCK_DATA() unlock_data(__func__, __LINE__)
#define COND_STATE_WAIT(mythd, abstime, stage) \
cond_wait(mythd, abstime, stage, __func__, __FILE__, __LINE__)
extern my_thread_attr_t connection_attrib;
static const LEX_CSTRING scheduler_states_names[] = {
{STRING_WITH_LEN("INITIALIZED")},
{STRING_WITH_LEN("RUNNING")},
{STRING_WITH_LEN("STOPPING")}};
struct scheduler_param {
THD *thd;
Event_scheduler *scheduler;
};
/*
Prints the stack of infos, warnings, errors from thd to
the console so it can be fetched by the logs-into-tables and
checked later.
SYNOPSIS
evex_print_warnings
thd Thread used during the execution of the event
et The event itself
*/
void Event_worker_thread::print_warnings(THD *thd, Event_job_data *et) {
const Sql_condition *err;
enum loglevel ll;
DBUG_TRACE;
if (thd->get_stmt_da()->cond_count() == 0) return;
char msg_buf[10 * STRING_BUFFER_USUAL_SIZE];
char prefix_buf[5 * STRING_BUFFER_USUAL_SIZE];
String prefix(prefix_buf, sizeof(prefix_buf), system_charset_info);
prefix.length(0);
prefix.append("Event Scheduler: [");
prefix.append(et->m_definer.str, et->m_definer.length, system_charset_info);
prefix.append("][", 2);
prefix.append(et->m_schema_name.str, et->m_schema_name.length,
system_charset_info);
prefix.append('.');
prefix.append(et->m_event_name.str, et->m_event_name.length,
system_charset_info);
prefix.append("] ", 2);
Diagnostics_area::Sql_condition_iterator it =
thd->get_stmt_da()->sql_conditions();
while ((err = it++)) {
String err_msg(msg_buf, sizeof(msg_buf), system_charset_info);
/* set it to 0 or we start adding at the end. That's the trick ;) */
err_msg.length(0);
err_msg.append(prefix);
err_msg.append(err->message_text(), err->message_octet_length(),
system_charset_info);
switch (err->severity()) {
case Sql_condition::SL_ERROR:
ll = ERROR_LEVEL;
break;
case Sql_condition::SL_WARNING:
ll = WARNING_LEVEL;
break;
case Sql_condition::SL_NOTE:
ll = INFORMATION_LEVEL;
break;
default:
ll = ERROR_LEVEL;
DBUG_ASSERT(false);
}
LogErr(ll, ER_EVENT_MESSAGE_STACK, static_cast<int>(err_msg.length()),
err_msg.c_ptr());
}
}
/*
Performs post initialization of structures in a new thread.
SYNOPSIS
post_init_event_thread()
thd Thread
NOTES
Before this is called, one should not do any DBUG_XXX() calls.
*/
bool post_init_event_thread(THD *thd) {
if (my_thread_init()) {
return true;
}
thd->store_globals();
Global_THD_manager *thd_manager = Global_THD_manager::get_instance();
thd_manager->add_thd(thd);
thd_manager->inc_thread_running();
return false;
}
/*
Cleans up the THD and the threaded environment of the thread.
SYNOPSIS
deinit_event_thread()
thd Thread
*/
void deinit_event_thread(THD *thd) {
Global_THD_manager *thd_manager = Global_THD_manager::get_instance();
thd->proc_info = "Clearing";
thd->get_protocol_classic()->end_net();
DBUG_PRINT("exit", ("Event thread finishing"));
thd->release_resources();
thd_manager->remove_thd(thd);
thd_manager->dec_thread_running();
delete thd;
}
/*
Performs pre- mysql_thread_create() initialisation of THD. Do this
in the thread that will pass THD to the child thread. In the
child thread call post_init_event_thread().
SYNOPSIS
pre_init_event_thread()
thd The THD of the thread. Has to be allocated by the caller.
NOTES
1. The host of the thead is my_localhost
2. thd->net is initted with NULL - no communication.
*/
void pre_init_event_thread(THD *thd) {
DBUG_TRACE;
thd->security_context()->set_master_access(0);
thd->security_context()->cache_current_db_access(0);
thd->security_context()->set_host_or_ip_ptr(my_localhost,
strlen(my_localhost));
thd->get_protocol_classic()->init_net(NULL);
thd->security_context()->set_user_ptr(STRING_WITH_LEN("event_scheduler"));
thd->get_protocol_classic()->get_net()->read_timeout = slave_net_timeout;
thd->slave_thread = 0;
thd->variables.option_bits |= OPTION_AUTO_IS_NULL;
thd->get_protocol_classic()->set_client_capabilities(CLIENT_MULTI_RESULTS);
thd->set_new_thread_id();
/*
Guarantees that we will see the thread in SHOW PROCESSLIST though its
vio is NULL.
*/
thd->proc_info = "Initialized";
thd->set_time();
/* Do not use user-supplied timeout value for system threads. */
thd->variables.lock_wait_timeout = LONG_TIMEOUT;
}
/*
Function that executes the scheduler,
SYNOPSIS
event_scheduler_thread()
arg Pointer to `struct scheduler_param`
RETURN VALUE
0 OK
*/
extern "C" {
static void *event_scheduler_thread(void *arg) {
/* needs to be first for thread_stack */
THD *thd = ((struct scheduler_param *)arg)->thd;
Event_scheduler *scheduler = ((struct scheduler_param *)arg)->scheduler;
bool res;
thd->thread_stack = (char *)&thd; // remember where our stack is
mysql_thread_set_psi_id(thd->thread_id());
res = post_init_event_thread(thd);
{
DBUG_TRACE;
my_claim(arg);
thd->claim_memory_ownership();
my_free(arg);
if (!res)
scheduler->run(thd);
else {
thd->proc_info = "Clearing";
thd->get_protocol_classic()->end_net();
delete thd;
}
} // Against gcc warnings
my_thread_end();
return 0;
}
/**
Function that executes an event in a child thread. Setups the
environment for the event execution and cleans after that.
SYNOPSIS
event_worker_thread()
arg The Event_job_data object to be processed
RETURN VALUE
0 OK
*/
static void *event_worker_thread(void *arg) {
THD *thd;
Event_queue_element_for_exec *event = (Event_queue_element_for_exec *)arg;
event->claim_memory_ownership();
thd = event->thd;
thd->claim_memory_ownership();
mysql_thread_set_psi_id(thd->thread_id());
Event_worker_thread worker_thread;
worker_thread.run(thd, event);
my_thread_end();
return 0; // Can't return anything here
}
} // extern "C"
/**
Function that executes an event in a child thread. Setups the
environment for the event execution and cleans after that.
SYNOPSIS
Event_worker_thread::run()
thd Thread context
event The Event_queue_element_for_exec object to be processed
*/
void Event_worker_thread::run(THD *thd, Event_queue_element_for_exec *event) {
/* needs to be first for thread_stack */
char my_stack;
Event_job_data job_data;
bool res;
DBUG_ASSERT(thd->m_digest == NULL);
thd->thread_stack = &my_stack; // remember where our stack is
res = post_init_event_thread(thd);
DBUG_TRACE;
DBUG_PRINT("info", ("Time is %ld, THD: %p", (long)my_time(0), thd));
if (res) {
delete event;
deinit_event_thread(thd);
return;
}
#ifdef HAVE_PSI_STATEMENT_INTERFACE
PSI_statement_locker_state state;
DBUG_ASSERT(thd->m_statement_psi == NULL);
thd->m_statement_psi = MYSQL_START_STATEMENT(
&state, event->get_psi_info()->m_key, event->dbname.str,
event->dbname.length, thd->charset(), NULL);
#endif
/*
We must make sure the schema is released and unlocked in the right
order. Fail if we are unable to get a meta data lock on the schema
name. Separate scope so that the Schema_MDL_locker dtor is run before
thd is deleted.
*/
{
dd::Schema_MDL_locker mdl_handler(thd);
if (mdl_handler.ensure_locked(event->dbname.str)) goto end;
MDL_key mdl_key;
dd::Event::create_mdl_key(event->dbname.str, event->name.str, &mdl_key);
MDL_request event_mdl_request;
MDL_REQUEST_INIT_BY_KEY(&event_mdl_request, &mdl_key, MDL_SHARED,
MDL_EXPLICIT);
if (thd->mdl_context.acquire_lock(&event_mdl_request,
thd->variables.lock_wait_timeout)) {
DBUG_PRINT("error", ("Got error in getting MDL locks"));
goto end;
}
if ((res = Event_db_repository::load_named_event(thd, event->dbname,
event->name, &job_data))) {
DBUG_PRINT("error", ("Got error from load_named_event"));
thd->mdl_context.release_lock(event_mdl_request.ticket);
goto end;
}
thd->mdl_context.release_lock(event_mdl_request.ticket);
} // End scope so that schema metadata lock is released.
thd->enable_slow_log = true;
res = job_data.execute(thd, event->dropped);
print_warnings(thd, &job_data);
if (res)
LogErr(INFORMATION_LEVEL, ER_EVENT_EXECUTION_FAILED, job_data.m_definer.str,
job_data.m_schema_name.str, job_data.m_event_name.str);
end:
#ifdef HAVE_PSI_STATEMENT_INTERFACE
MYSQL_END_STATEMENT(thd->m_statement_psi, thd->get_stmt_da());
thd->m_statement_psi = NULL;
#endif
DBUG_ASSERT(thd->m_digest == NULL);
DBUG_PRINT("info",
("Done with Event %s.%s", event->dbname.str, event->name.str));
delete event;
deinit_event_thread(thd);
}
Event_scheduler::Event_scheduler(Event_queue *queue_arg)
: state(INITIALIZED),
scheduler_thd(NULL),
queue(queue_arg),
mutex_last_locked_at_line(0),
mutex_last_unlocked_at_line(0),
mutex_last_locked_in_func("n/a"),
mutex_last_unlocked_in_func("n/a"),
mutex_scheduler_data_locked(false),
waiting_on_cond(false),
started_events(0) {
mysql_mutex_init(key_event_scheduler_LOCK_scheduler_state,
&LOCK_scheduler_state, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_event_scheduler_COND_state, &COND_state);
}
Event_scheduler::~Event_scheduler() {
stop(); /* does nothing if not running */
mysql_mutex_destroy(&LOCK_scheduler_state);
mysql_cond_destroy(&COND_state);
}
/**
Starts the scheduler (again). Creates a new THD and passes it to
a forked thread. Does not wait for acknowledgement from the new
thread that it has started. Asynchronous starting. Most of the
needed initializations are done in the current thread to minimize
the chance of failure in the spawned thread.
@param[out] err_no - errno indicating type of error which caused
failure to start scheduler thread.
@return
@retval false Success.
@retval true Error.
*/
bool Event_scheduler::start(int *err_no) {
THD *new_thd = NULL;
bool ret = false;
my_thread_handle th;
struct scheduler_param *scheduler_param_value;
DBUG_TRACE;
LOCK_DATA();
DBUG_PRINT("info",
("state before action %s", scheduler_states_names[state].str));
if (state > INITIALIZED) goto end;
DBUG_EXECUTE_IF("event_scheduler_thread_create_failure", {
*err_no = 11;
Events::opt_event_scheduler = Events::EVENTS_OFF;
ret = true;
goto end;
});
if (!(new_thd = new THD)) {
LogErr(ERROR_LEVEL, ER_CANT_INIT_SCHEDULER_THREAD);
ret = true;
goto end;
}
pre_init_event_thread(new_thd);
new_thd->system_thread = SYSTEM_THREAD_EVENT_SCHEDULER;
new_thd->set_command(COM_DAEMON);
/*
We should run the event scheduler thread under the super-user privileges.
In particular, this is needed to be able to lock the mysql.events table
for writing when the server is running in the read-only mode.
Same goes for transaction access mode. Set it to read-write for this thd.
In case the definer has SYSTEM_USER privileges then event scheduler thread
can drop the event only if the same privilege is granted to it.
Therefore, assign all privileges to this thread.
*/
new_thd->security_context()->skip_grants();
new_thd->security_context()->set_host_or_ip_ptr(my_localhost,
strlen(my_localhost));
new_thd->variables.transaction_read_only = false;
new_thd->tx_read_only = false;
scheduler_param_value = (struct scheduler_param *)my_malloc(
key_memory_Event_scheduler_scheduler_param,
sizeof(struct scheduler_param), MYF(0));
scheduler_param_value->thd = new_thd;
scheduler_param_value->scheduler = this;
scheduler_thd = new_thd;
DBUG_PRINT("info", ("Setting state go RUNNING"));
state = RUNNING;
DBUG_PRINT("info", ("Forking new thread for scheduler. THD: %p", new_thd));
if ((*err_no = mysql_thread_create(key_thread_event_scheduler, &th,
&connection_attrib, event_scheduler_thread,
(void *)scheduler_param_value))) {
DBUG_PRINT("error", ("cannot create a new thread"));
LogErr(ERROR_LEVEL, ER_CANT_CREATE_SCHEDULER_THREAD, *err_no)
.os_errno(*err_no);
new_thd->proc_info = "Clearing";
new_thd->get_protocol_classic()->end_net();
state = INITIALIZED;
scheduler_thd = NULL;
delete new_thd;
my_free(scheduler_param_value);
ret = true;
}
end:
UNLOCK_DATA();
return ret;
}
/*
The main loop of the scheduler.
SYNOPSIS
Event_scheduler::run()
thd Thread
RETURN VALUE
false OK
true Error (Serious error)
*/
bool Event_scheduler::run(THD *thd) {
bool res = false;
DBUG_TRACE;
LogErr(INFORMATION_LEVEL, ER_SCHEDULER_STARTED, thd->thread_id());
/*
Recalculate the values in the queue because there could have been stops
in executions of the scheduler and some times could have passed by.
*/
queue->recalculate_activation_times(thd);
while (is_running()) {
Event_queue_element_for_exec *event_name;
/* Gets a minimized version */
if (queue->get_top_for_execution_if_time(thd, &event_name)) {
LogErr(INFORMATION_LEVEL, ER_SCHEDULER_STOPPING_FAILED_TO_GET_EVENT);
break;
}
DBUG_PRINT("info", ("get_top_for_execution_if_time returned "
"event_name=%p",
event_name));
if (event_name) {
if ((res = execute_top(event_name))) break;
} else {
DBUG_ASSERT(thd->killed);
DBUG_PRINT("info", ("job_data is NULL, the thread was killed"));
}
DBUG_PRINT("info", ("state=%s", scheduler_states_names[state].str));
}
LOCK_DATA();
deinit_event_thread(thd);
scheduler_thd = NULL;
state = INITIALIZED;
DBUG_PRINT("info", ("Broadcasting COND_state back to the stoppers"));
mysql_cond_broadcast(&COND_state);
UNLOCK_DATA();
return res;
}
/*
Creates a new THD instance and then forks a new thread, while passing
the THD pointer and job_data to it.
SYNOPSIS
Event_scheduler::execute_top()
RETURN VALUE
false OK
true Error (Serious error)
*/
bool Event_scheduler::execute_top(Event_queue_element_for_exec *event_name) {
THD *new_thd;
my_thread_handle th;
int res = 0;
DBUG_TRACE;
if (!(new_thd = new THD())) goto error;
pre_init_event_thread(new_thd);
new_thd->system_thread = SYSTEM_THREAD_EVENT_WORKER;
event_name->thd = new_thd;
DBUG_PRINT("info", ("Event %s@%s ready for start", event_name->dbname.str,
event_name->name.str));
/*
TODO: should use thread pool here, preferably with an upper limit
on number of threads: if too many events are scheduled for the
same time, starting all of them at once won't help them run truly
in parallel (because of the great amount of synchronization), so
we may as well execute them in sequence, keeping concurrency at a
reasonable level.
*/
/* Major failure */
if ((res =
mysql_thread_create(key_thread_event_worker, &th, &connection_attrib,
event_worker_thread, event_name))) {
mysql_mutex_lock(&LOCK_global_system_variables);
Events::opt_event_scheduler = Events::EVENTS_OFF;
mysql_mutex_unlock(&LOCK_global_system_variables);
LogErr(ERROR_LEVEL, ER_SCHEDULER_STOPPING_FAILED_TO_CREATE_WORKER, res);
new_thd->proc_info = "Clearing";
new_thd->get_protocol_classic()->end_net();
goto error;
}
++started_events;
DBUG_PRINT("info", ("Event is in THD: %p", new_thd));
return false;
error:
DBUG_PRINT("error", ("Event_scheduler::execute_top() res: %d", res));
if (new_thd) delete new_thd;
delete event_name;
return true;
}
/*
Checks whether the state of the scheduler is RUNNING
SYNOPSIS
Event_scheduler::is_running()
RETURN VALUE
true RUNNING
false Not RUNNING
*/
bool Event_scheduler::is_running() {
LOCK_DATA();
bool ret = (state == RUNNING);
UNLOCK_DATA();
return ret;
}
/**
Stops the scheduler (again). Waits for acknowledgement from the
scheduler that it has stopped - synchronous stopping.
Already running events will not be stopped. If the user needs
them stopped manual intervention is needed.
SYNOPSIS
Event_scheduler::stop()
RETURN VALUE
false OK
true Error (not reported)
*/
bool Event_scheduler::stop() {
THD *thd = current_thd;
DBUG_TRACE;
DBUG_PRINT("enter", ("thd: %p", thd));
LOCK_DATA();
DBUG_PRINT("info",
("state before action %s", scheduler_states_names[state].str));
if (state != RUNNING) {
/* Synchronously wait until the scheduler stops. */
while (state != INITIALIZED)
COND_STATE_WAIT(thd, NULL, &stage_waiting_for_scheduler_to_stop);
goto end;
}
/* Guarantee we don't catch spurious signals */
do {
DBUG_PRINT("info", ("Waiting for COND_started_or_stopped from "
"the scheduler thread. Current value of state is %s . "
"workers count=%d",
scheduler_states_names[state].str, workers_count()));
/*
NOTE: We don't use kill_one_thread() because it can't kill COM_DEAMON
threads. In addition, kill_one_thread() requires THD but during shutdown
current_thd is NULL. Hence, if kill_one_thread should be used it has to
be modified to kill also daemons, by adding a flag, and also we have to
create artificial THD here. To save all this work, we just do what
kill_one_thread() does to kill a thread. See also sql_repl.cc for similar
usage.
*/
state = STOPPING;
DBUG_PRINT("info",
("Scheduler thread has id %u", scheduler_thd->thread_id()));
/* Lock from delete */
mysql_mutex_lock(&scheduler_thd->LOCK_thd_data);
/* This will wake up the thread if it waits on Queue's conditional */
LogErr(INFORMATION_LEVEL, ER_SCHEDULER_KILLING, scheduler_thd->thread_id());
scheduler_thd->awake(THD::KILL_CONNECTION);
mysql_mutex_unlock(&scheduler_thd->LOCK_thd_data);
/* thd could be 0x0, when shutting down */
LogErr(INFORMATION_LEVEL, ER_SCHEDULER_WAITING);
COND_STATE_WAIT(thd, NULL, &stage_waiting_for_scheduler_to_stop);
} while (state == STOPPING);
DBUG_PRINT("info", ("Scheduler thread has cleaned up. Set state to INIT"));
LogErr(INFORMATION_LEVEL, ER_SCHEDULER_STOPPED);
end:
UNLOCK_DATA();
return false;
}
/**
This class implements callback for do_for_all_thd().
It counts the total number of living event worker threads
from global thread list.
*/
class Is_worker : public Do_THD_Impl {
public:
Is_worker() : m_count(0) {}
virtual void operator()(THD *thd) {
if (thd->system_thread == SYSTEM_THREAD_EVENT_WORKER) m_count++;
return;
}
int get_count() { return m_count; }
private:
int m_count;
};
/*
Returns the number of living event worker threads.
SYNOPSIS
Event_scheduler::workers_count()
*/
int Event_scheduler::workers_count() {
int count = 0;
Is_worker is_worker;
DBUG_TRACE;
Global_THD_manager::get_instance()->do_for_all_thd(&is_worker);
count = is_worker.get_count();
DBUG_PRINT("exit", ("%d", count));
return count;
}
/*
Auxiliary function for locking LOCK_scheduler_state. Used
by the LOCK_DATA macro.
SYNOPSIS
Event_scheduler::lock_data()
func Which function is requesting mutex lock
line On which line mutex lock is requested
*/
void Event_scheduler::lock_data(const char *func, uint line) {
DBUG_TRACE;
DBUG_PRINT("enter", ("func=%s line=%u", func, line));
mysql_mutex_lock(&LOCK_scheduler_state);
mutex_last_locked_in_func = func;
mutex_last_locked_at_line = line;
mutex_scheduler_data_locked = true;
}
/*
Auxiliary function for unlocking LOCK_scheduler_state. Used
by the UNLOCK_DATA macro.
SYNOPSIS
Event_scheduler::unlock_data()
func Which function is requesting mutex unlock
line On which line mutex unlock is requested
*/
void Event_scheduler::unlock_data(const char *func, uint line) {
DBUG_TRACE;
DBUG_PRINT("enter", ("func=%s line=%u", func, line));
mutex_last_unlocked_at_line = line;
mutex_scheduler_data_locked = false;
mutex_last_unlocked_in_func = func;
mysql_mutex_unlock(&LOCK_scheduler_state);
}
/*
Wrapper for mysql_cond_wait/timedwait
SYNOPSIS
Event_scheduler::cond_wait()
thd Thread (Could be NULL during shutdown procedure)
abstime If not null then call mysql_cond_timedwait()
msg Message for thd->proc_info
func Which function is requesting cond_wait
line On which line cond_wait is requested
*/
void Event_scheduler::cond_wait(THD *thd, struct timespec *abstime,
const PSI_stage_info *stage,
const char *src_func, const char *src_file,
uint src_line) {
DBUG_TRACE;
waiting_on_cond = true;
mutex_last_unlocked_at_line = src_line;
mutex_scheduler_data_locked = false;
mutex_last_unlocked_in_func = src_func;
if (thd)
thd->enter_cond(&COND_state, &LOCK_scheduler_state, stage, NULL, src_func,
src_file, src_line);
DBUG_PRINT("info", ("mysql_cond_%swait", abstime ? "timed" : ""));
if (!abstime)
mysql_cond_wait(&COND_state, &LOCK_scheduler_state);
else
mysql_cond_timedwait(&COND_state, &LOCK_scheduler_state, abstime);
if (thd) {
/*
Need to unlock before exit_cond, so we need to relock.
Not the best thing to do but we need to obey cond_wait()
*/
UNLOCK_DATA();
thd->exit_cond(NULL, src_func, src_file, src_line);
LOCK_DATA();
}
mutex_last_locked_in_func = src_func;
mutex_last_locked_at_line = src_line;
mutex_scheduler_data_locked = true;
waiting_on_cond = false;
}
/*
Dumps the internal status of the scheduler
SYNOPSIS
Event_scheduler::dump_internal_status()
*/
void Event_scheduler::dump_internal_status() {
DBUG_TRACE;
puts("");
puts("Event scheduler status:");
printf("State : %s\n", scheduler_states_names[state].str);
printf("Thread id : %u\n", scheduler_thd ? scheduler_thd->thread_id() : 0);
printf("LLA : %s:%u\n", mutex_last_locked_in_func,
mutex_last_locked_at_line);
printf("LUA : %s:%u\n", mutex_last_unlocked_in_func,
mutex_last_unlocked_at_line);
printf("WOC : %s\n", waiting_on_cond ? "YES" : "NO");
printf("Workers : %d\n", workers_count());
printf("Executed : %lu\n", (ulong)started_events);
printf("Data locked: %s\n", mutex_scheduler_data_locked ? "YES" : "NO");
}
/**
@} (End of group Event_Scheduler)
*/