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few bugs in the tracker support

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* ma_multi_malloc wanted uint for size arguments, not size_t
* ma_multi_malloc needs NULL pointer at the end. Simple 0
  is not always the right size
* don't look for tracker info, if the packet does not even
  has the info_len field
This commit is contained in:
Sergei Golubchik
2016-09-21 17:35:54 +02:00
parent f968c04037
commit 4ff192bb40
2 changed files with 88 additions and 85 deletions
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167
libmariadb/mariadb_lib.c
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@@ -1929,79 +1929,50 @@ get_info:
pos+=2;
mysql->warning_count=uint2korr(pos);
pos+=2;
if (pos < mysql->net.read_pos+length && (item_len= net_field_length(&pos)))
mysql->info=(char*) pos;
/* check if server supports session tracking */
if (mysql->server_capabilities & CLIENT_SESSION_TRACKING)
if (pos < mysql->net.read_pos+length)
{
ma_clear_session_state(mysql);
pos+= item_len;
if ((item_len= net_field_length(&pos)))
mysql->info=(char*) pos;
if (mysql->server_status & SERVER_SESSION_STATE_CHANGED)
/* check if server supports session tracking */
if (mysql->server_capabilities & CLIENT_SESSION_TRACKING)
{
int i;
if (pos < mysql->net.read_pos + length)
ma_clear_session_state(mysql);
pos+= item_len;
if (mysql->server_status & SERVER_SESSION_STATE_CHANGED)
{
LIST *session_item;
MYSQL_LEX_STRING *str= NULL;
enum enum_session_state_type si_type;
uchar *old_pos= pos;
size_t item_len= net_field_length(&pos); /* length for all items */
/* length was already set, so make sure that info will be zero terminated */
if (mysql->info)
*old_pos= 0;
while (item_len > 0)
int i;
if (pos < mysql->net.read_pos + length)
{
size_t plen;
char *data;
old_pos= pos;
si_type= (enum enum_session_state_type)net_field_length(&pos);
switch(si_type) {
case SESSION_TRACK_SCHEMA:
case SESSION_TRACK_STATE_CHANGE:
case SESSION_TRACK_TRANSACTION_CHARACTERISTICS:
case SESSION_TRACK_SYSTEM_VARIABLES:
net_field_length(&pos); /* ignore total length, item length will follow next */
plen= net_field_length(&pos);
if (!ma_multi_malloc(0,
&session_item, sizeof(LIST),
&str, sizeof(MYSQL_LEX_STRING),
&data, plen,
0))
{
SET_CLIENT_ERROR(mysql, CR_OUT_OF_MEMORY, SQLSTATE_UNKNOWN, 0);
return -1;
}
str->length= plen;
str->str= data;
memcpy(str->str, (char *)pos, plen);
pos+= plen;
session_item->data= str;
mysql->extension->session_state[si_type].list= list_add(mysql->extension->session_state[si_type].list, session_item);
LIST *session_item;
MYSQL_LEX_STRING *str= NULL;
enum enum_session_state_type si_type;
uchar *old_pos= pos;
size_t item_len= net_field_length(&pos); /* length for all items */
/* in case schema has changed, we have to update mysql->db */
if (si_type == SESSION_TRACK_SCHEMA)
{
free(mysql->db);
mysql->db= malloc(plen + 1);
memcpy(mysql->db, str->str, plen);
mysql->db[plen]= 0;
}
else if (si_type == SESSION_TRACK_SYSTEM_VARIABLES)
{
my_bool set_charset= 0;
/* make sure that we update charset in case it has changed */
if (!strncmp(str->str, "character_set_client", str->length))
set_charset= 1;
/* length was already set, so make sure that info will be zero terminated */
if (mysql->info)
*old_pos= 0;
while (item_len > 0)
{
size_t plen;
char *data;
old_pos= pos;
si_type= (enum enum_session_state_type)net_field_length(&pos);
switch(si_type) {
case SESSION_TRACK_SCHEMA:
case SESSION_TRACK_STATE_CHANGE:
case SESSION_TRACK_TRANSACTION_CHARACTERISTICS:
case SESSION_TRACK_SYSTEM_VARIABLES:
net_field_length(&pos); /* ignore total length, item length will follow next */
plen= net_field_length(&pos);
if (!ma_multi_malloc(0,
&session_item, sizeof(LIST),
&str, sizeof(MYSQL_LEX_STRING),
&data, plen,
0))
NULL))
{
SET_CLIENT_ERROR(mysql, CR_OUT_OF_MEMORY, SQLSTATE_UNKNOWN, 0);
return -1;
@@ -2012,31 +1983,63 @@ get_info:
pos+= plen;
session_item->data= str;
mysql->extension->session_state[si_type].list= list_add(mysql->extension->session_state[si_type].list, session_item);
if (set_charset &&
strncmp(mysql->charset->csname, str->str, str->length) != 0)
/* in case schema has changed, we have to update mysql->db */
if (si_type == SESSION_TRACK_SCHEMA)
{
char cs_name[64];
MARIADB_CHARSET_INFO *cs_info;
memcpy(cs_name, str->str, str->length);
cs_name[str->length]= 0;
if ((cs_info = (MARIADB_CHARSET_INFO *)mysql_find_charset_name(cs_name)))
mysql->charset= cs_info;
free(mysql->db);
mysql->db= malloc(plen + 1);
memcpy(mysql->db, str->str, plen);
mysql->db[plen]= 0;
}
else if (si_type == SESSION_TRACK_SYSTEM_VARIABLES)
{
my_bool set_charset= 0;
/* make sure that we update charset in case it has changed */
if (!strncmp(str->str, "character_set_client", str->length))
set_charset= 1;
plen= net_field_length(&pos);
if (!ma_multi_malloc(0,
&session_item, sizeof(LIST),
&str, sizeof(MYSQL_LEX_STRING),
&data, plen,
NULL))
{
SET_CLIENT_ERROR(mysql, CR_OUT_OF_MEMORY, SQLSTATE_UNKNOWN, 0);
return -1;
}
str->length= plen;
str->str= data;
memcpy(str->str, (char *)pos, plen);
pos+= plen;
session_item->data= str;
mysql->extension->session_state[si_type].list= list_add(mysql->extension->session_state[si_type].list, session_item);
if (set_charset &&
strncmp(mysql->charset->csname, str->str, str->length) != 0)
{
char cs_name[64];
MARIADB_CHARSET_INFO *cs_info;
memcpy(cs_name, str->str, str->length);
cs_name[str->length]= 0;
if ((cs_info = (MARIADB_CHARSET_INFO *)mysql_find_charset_name(cs_name)))
mysql->charset= cs_info;
}
}
break;
default:
/* not supported yet */
plen= net_field_length(&pos);
pos+= plen;
break;
}
break;
default:
/* not supported yet */
plen= net_field_length(&pos);
pos+= plen;
break;
item_len-= (pos - old_pos);
}
item_len-= (pos - old_pos);
}
}
for (i= SESSION_TRACK_BEGIN; i <= SESSION_TRACK_END; i++)
{
mysql->extension->session_state[i].list= list_reverse(mysql->extension->session_state[i].list);
mysql->extension->session_state[i].current= mysql->extension->session_state[i].list;
for (i= SESSION_TRACK_BEGIN; i <= SESSION_TRACK_END; i++)
{
mysql->extension->session_state[i].list= list_reverse(mysql->extension->session_state[i].list);
mysql->extension->session_state[i].current= mysql->extension->session_state[i].list;
}
}
}
}