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Fixed thread safety issues in schemarouter and shardrouter

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Fixed strtok being used in a multithreaded context and removed unused code.
This commit is contained in:
Markus Makela 2016-01-04 18:30:38 +02:00
parent 3abcb52837
commit 05a7f5759b
2 changed files with 4 additions and 85 deletions
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47
server/modules/routing/schemarouter/schemarouter.c
View File

@ -569,8 +569,8 @@ char* get_shard_target_name(ROUTER_INSTANCE* router, ROUTER_CLIENT_SES* client,
query = modutil_get_SQL(buffer);
if((tmp = strcasestr(query,"from")))
{
char* tok = strtok(tmp, " ;");
tok = strtok(NULL," ;");
char *saved, *tok = strtok_r(tmp, " ;", &saved);
tok = strtok_r(NULL, " ;", &saved);
ss_dassert(tok != NULL);
tmp = (char*) hashtable_fetch(ht, tok);
@ -652,49 +652,6 @@ bool check_shard_status(ROUTER_INSTANCE* router, char* shard)
return rval;
}
/**
* Turn a string into an array of strings. The last element in the list is a NULL
* pointer.
* @param str String to tokenize
* @return Pointer to an array of strings.
*/
char** tokenize_string(char* str)
{
char *tok;
char **list = NULL;
int sz = 2, count = 0;
tok = strtok(str,", ");
if(tok == NULL)
return NULL;
list = (char**)malloc(sizeof(char*)*(sz));
while(tok)
{
if(count + 1 >= sz)
{
char** tmp = realloc(list,sizeof(char*)*(sz*2));
if(tmp == NULL)
{
char errbuf[STRERROR_BUFLEN];
MXS_ERROR("realloc returned NULL: %s.",
strerror_r(errno, errbuf, sizeof(errbuf)));
free(list);
return NULL;
}
list = tmp;
sz *= 2;
}
list[count] = strdup(tok);
count++;
tok = strtok(NULL,", ");
}
list[count] = NULL;
return list;
}
/**
* A fake DCB read function used to forward queued queries.
* @param dcb Internal DCB used by the router session

42
server/modules/routing/schemarouter/shardrouter.c
View File

@ -482,8 +482,8 @@ get_shard_target_name(ROUTER_INSTANCE* router, ROUTER_CLIENT_SES* client, GWBUF*
query = modutil_get_SQL(buffer);
if((tmp = strcasestr(query,"from")))
{
char* tok = strtok(tmp, " ;");
tok = strtok(NULL," ;");
char *saved, *tok = strtok_r(tmp, " ;", &saved);
tok = strtok_r(NULL, " ;", &saved);
ss_dassert(tok != NULL);
tmp = (char*) hashtable_fetch(ht, tok);
if(tmp)
@ -542,44 +542,6 @@ get_shard_target_name(ROUTER_INSTANCE* router, ROUTER_CLIENT_SES* client, GWBUF*
return rval;
}
char**
tokenize_string(char* str)
{
char *tok;
char **list = NULL;
int sz = 2, count = 0;
tok = strtok(str, ", ");
if(tok == NULL)
return NULL;
list = (char**) malloc(sizeof(char*)*(sz));
while(tok)
{
if(count + 1 >= sz)
{
char** tmp = realloc(list, sizeof(char*)*(sz * 2));
if(tmp == NULL)
{
char errbuf[STRERROR_BUFLEN];
MXS_ERROR("realloc returned NULL: %s.",
strerror_r(errno, errbuf, sizeof(errbuf)));
free(list);
return NULL;
}
list = tmp;
sz *= 2;
}
list[count] = strdup(tok);
count++;
tok = strtok(NULL, ", ");
}
list[count] = NULL;
return list;
}
/**
* This is the function used to channel replies from a subservice up to the client.
* The values passed are set in the newSession function.