/* Copyright (c) 2010, 2023, Oracle and/or its affiliates.
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 ,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/**
@ file storage / perfschema / pfs_events_statements . cc
Events statements data structures ( implementation ) .
*/
#include "my_global.h"
#include "my_sys.h"
#include "pfs_global.h"
#include "pfs_instr_class.h"
#include "pfs_instr.h"
#include "pfs_account.h"
#include "pfs_host.h"
#include "pfs_user.h"
#include "pfs_events_statements.h"
#include "pfs_buffer_container.h"
#include "pfs_builtin_memory.h"
#include "m_string.h"
PFS_ALIGNED size_t events_statements_history_long_size= 0 ;
/** Consumer flag for table EVENTS_STATEMENTS_CURRENT. */
PFS_ALIGNED bool flag_events_statements_current= false ;
/** Consumer flag for table EVENTS_STATEMENTS_HISTORY. */
PFS_ALIGNED bool flag_events_statements_history= false ;
/** Consumer flag for table EVENTS_STATEMENTS_HISTORY_LONG. */
PFS_ALIGNED bool flag_events_statements_history_long= false ;
/** True if EVENTS_STATEMENTS_HISTORY_LONG circular buffer is full. */
PFS_ALIGNED bool events_statements_history_long_full= false ;
/** Index in EVENTS_STATEMENTS_HISTORY_LONG circular buffer. */
PFS_ALIGNED PFS_cacheline_uint32 events_statements_history_long_index;
/** EVENTS_STATEMENTS_HISTORY_LONG circular buffer. */
PFS_ALIGNED PFS_events_statements *events_statements_history_long_array= NULL;
static unsigned char *h_long_stmts_digest_token_array= NULL;
static char *h_long_stmts_text_array= NULL;
/**
Initialize table EVENTS_STATEMENTS_HISTORY_LONG .
@ param events_statements_history_long_sizing table sizing
*/
int init_events_statements_history_long(size_t events_statements_history_long_sizing)
{
events_statements_history_long_size= events_statements_history_long_sizing;
events_statements_history_long_full= false ;
events_statements_history_long_index.m_u32.store(0 );
if (events_statements_history_long_size == 0 )
return 0 ;
events_statements_history_long_array=
PFS_MALLOC_ARRAY(& builtin_memory_statements_history_long,
events_statements_history_long_size, sizeof (PFS_events_statements),
PFS_events_statements, MYF(MY_ZEROFILL));
if (events_statements_history_long_array == NULL)
{
cleanup_events_statements_history_long();
return 1 ;
}
if (pfs_max_digest_length > 0 )
{
/* Size of each digest text array. */
size_t digest_text_size= pfs_max_digest_length * sizeof (unsigned char );
h_long_stmts_digest_token_array=
PFS_MALLOC_ARRAY(& builtin_memory_statements_history_long_tokens,
events_statements_history_long_size, digest_text_size,
unsigned char , MYF(MY_ZEROFILL));
if (h_long_stmts_digest_token_array == NULL)
{
cleanup_events_statements_history_long();
return 1 ;
}
}
if (pfs_max_sqltext > 0 )
{
/* Size of each sql text array. */
size_t sqltext_size= pfs_max_sqltext * sizeof (char );
h_long_stmts_text_array=
PFS_MALLOC_ARRAY(& builtin_memory_statements_history_long_sqltext,
events_statements_history_long_size, sqltext_size,
char , MYF(MY_ZEROFILL));
if (h_long_stmts_text_array == NULL)
{
cleanup_events_statements_history_long();
return 1 ;
}
}
for (size_t index= 0 ; index < events_statements_history_long_size; index++)
{
events_statements_history_long_array[index].m_digest_storage.reset(h_long_stmts_digest_token_array
+ index * pfs_max_digest_length, pfs_max_digest_length);
events_statements_history_long_array[index].m_sqltext= h_long_stmts_text_array + index * pfs_max_sqltext;
}
return 0 ;
}
/** Cleanup table EVENTS_STATEMENTS_HISTORY_LONG. */
void cleanup_events_statements_history_long(void )
{
PFS_FREE_ARRAY(& builtin_memory_statements_history_long,
events_statements_history_long_size,
sizeof (PFS_events_statements),
events_statements_history_long_array);
PFS_FREE_ARRAY(& builtin_memory_statements_history_long_tokens,
events_statements_history_long_size,
(pfs_max_digest_length * sizeof (unsigned char )),
h_long_stmts_digest_token_array);
PFS_FREE_ARRAY(& builtin_memory_statements_history_long_sqltext,
events_statements_history_long_size,
(pfs_max_sqltext * sizeof (char )),
h_long_stmts_text_array);
events_statements_history_long_array= NULL;
h_long_stmts_digest_token_array= NULL;
h_long_stmts_text_array= NULL;
}
inline void PFS_events_statements::copy(const PFS_events_statements &source)
{
/* Copy all attributes except SQL TEXT and DIGEST */
memcpy((void *) this , &source, offsetof(PFS_events_statements, m_sqltext));
/* Copy SQL TEXT */
int sqltext_length= source.m_sqltext_length;
if (sqltext_length > 0 )
{
memcpy(m_sqltext, source.m_sqltext, sqltext_length);
m_sqltext_length= sqltext_length;
}
else
{
m_sqltext_length= 0 ;
}
/* Copy DIGEST */
m_digest_storage.copy(&source.m_digest_storage);
}
/**
Insert a statement record in table EVENTS_STATEMENTS_HISTORY .
@ param thread thread that executed the wait
@ param statement record to insert
*/
void insert_events_statements_history(PFS_thread *thread, PFS_events_statements *statement)
{
if (unlikely(events_statements_history_per_thread == 0 ))
return ;
assert(thread->m_statements_history != NULL);
uint index= thread->m_statements_history_index;
/*
A concurrent thread executing TRUNCATE TABLE EVENTS_STATEMENTS_CURRENT
could alter the data that this thread is inserting ,
causing a potential race condition .
We are not testing for this and insert a possibly empty record ,
to make this thread ( the writer ) faster .
This is ok , the readers of m_statements_history will filter this out .
*/
thread->m_statements_history[index].copy(*statement);
index++;
if (index >= events_statements_history_per_thread)
{
index= 0 ;
thread->m_statements_history_full= true ;
}
thread->m_statements_history_index= index;
}
/**
Insert a statement record in table EVENTS_STATEMENTS_HISTORY_LONG .
@ param statement record to insert
*/
void insert_events_statements_history_long(PFS_events_statements *statement)
{
if (unlikely(events_statements_history_long_size == 0 ))
return ;
assert(events_statements_history_long_array != NULL);
uint index= events_statements_history_long_index.m_u32.fetch_add(1 );
index= index % events_statements_history_long_size;
if (index == 0 )
events_statements_history_long_full= true ;
/* See related comment in insert_events_statements_history. */
events_statements_history_long_array[index].copy(*statement);
}
static void fct_reset_events_statements_current(PFS_thread *pfs_thread)
{
PFS_events_statements *pfs_stmt= & pfs_thread->m_statement_stack[0 ];
PFS_events_statements *pfs_stmt_last= pfs_stmt + statement_stack_max;
for ( ; pfs_stmt < pfs_stmt_last; pfs_stmt++)
pfs_stmt->m_event.m_class= nullptr;
}
/** Reset table EVENTS_STATEMENTS_CURRENT data. */
void reset_events_statements_current(void )
{
global_thread_container.apply_all(fct_reset_events_statements_current);
}
static void fct_reset_events_statements_history(PFS_thread *pfs_thread)
{
PFS_events_statements *pfs= pfs_thread->m_statements_history;
PFS_events_statements *pfs_last= pfs + events_statements_history_per_thread;
pfs_thread->m_statements_history_index= 0 ;
pfs_thread->m_statements_history_full= false ;
for ( ; pfs < pfs_last; pfs++)
pfs->m_event.m_class= nullptr;
}
/** Reset table EVENTS_STATEMENTS_HISTORY data. */
void reset_events_statements_history(void )
{
global_thread_container.apply_all(fct_reset_events_statements_history);
}
/** Reset table EVENTS_STATEMENTS_HISTORY_LONG data. */
void reset_events_statements_history_long(void )
{
events_statements_history_long_index.m_u32.store(0 );
events_statements_history_long_full= false ;
PFS_events_statements *pfs= events_statements_history_long_array;
PFS_events_statements *pfs_last= pfs + events_statements_history_long_size;
for ( ; pfs < pfs_last; pfs++)
pfs->m_event.m_class= nullptr;
}
static void fct_reset_events_statements_by_thread(PFS_thread *thread)
{
PFS_account *account= sanitize_account(thread->m_account);
PFS_user *user= sanitize_user(thread->m_user);
PFS_host *host= sanitize_host(thread->m_host);
aggregate_thread_statements(thread, account, user, host);
}
/** Reset table EVENTS_STATEMENTS_SUMMARY_BY_THREAD_BY_EVENT_NAME data. */
void reset_events_statements_by_thread()
{
global_thread_container.apply(fct_reset_events_statements_by_thread);
}
static void fct_reset_events_statements_by_account(PFS_account *pfs)
{
PFS_user *user= sanitize_user(pfs->m_user);
PFS_host *host= sanitize_host(pfs->m_host);
pfs->aggregate_statements(user, host);
}
/** Reset table EVENTS_STATEMENTS_SUMMARY_BY_ACCOUNT_BY_EVENT_NAME data. */
void reset_events_statements_by_account()
{
global_account_container.apply(fct_reset_events_statements_by_account);
}
static void fct_reset_events_statements_by_user(PFS_user *pfs)
{
pfs->aggregate_statements();
}
/** Reset table EVENTS_STATEMENTS_SUMMARY_BY_USER_BY_EVENT_NAME data. */
void reset_events_statements_by_user()
{
global_user_container.apply(fct_reset_events_statements_by_user);
}
static void fct_reset_events_statements_by_host(PFS_host *pfs)
{
pfs->aggregate_statements();
}
/** Reset table EVENTS_STATEMENTS_SUMMARY_BY_HOST_BY_EVENT_NAME data. */
void reset_events_statements_by_host()
{
global_host_container.apply(fct_reset_events_statements_by_host);
}
/** Reset table EVENTS_STATEMENTS_GLOBAL_BY_EVENT_NAME data. */
void reset_events_statements_global()
{
PFS_statement_stat *stat= global_instr_class_statements_array;
PFS_statement_stat *stat_last= global_instr_class_statements_array + statement_class_max;
for ( ; stat < stat_last; stat++)
stat->reset();
}
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