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backport from 10.0: "bugfix: MYSQL_THDVAR_STR plugins with PLUGIN_VAR_MEMALLOC didn't work

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(PLUGIN_VAR_MEMALLOC is 0x8000 and cannot be saved in a char as such)"
This commit is contained in:
Sergei Golubchik 2013-12-12 18:14:08 +01:00
parent 5313e00199
commit c47dd98f90
1 changed files with 12 additions and 6 deletions
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18
sql/sql_plugin.cc
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@ -2371,8 +2371,14 @@ err:
#undef MYSQL_SYSVAR_NAME
#define MYSQL_SYSVAR_NAME(name) name
#define PLUGIN_VAR_TYPEMASK 0x007f
#define PLUGIN_VAR_BOOKMARK_KEY (PLUGIN_VAR_TYPEMASK | PLUGIN_VAR_MEMALLOC)
#define PLUGIN_VAR_TYPEMASK 0x7f
#define BOOKMARK_MEMALLOC 0x80
static inline char plugin_var_bookmark_key(uint flags)
{
return (flags & PLUGIN_VAR_TYPEMASK) |
(flags & PLUGIN_VAR_MEMALLOC ? BOOKMARK_MEMALLOC : 0);
}
#define EXTRA_OPTIONS 3 /* options for: 'foo', 'plugin-foo' and NULL */
@ -2752,7 +2758,7 @@ static st_bookmark *find_bookmark(const char *plugin, const char *name,
else
memcpy(varname + 1, name, namelen + 1);
varname[0]= flags & PLUGIN_VAR_BOOKMARK_KEY;
varname[0]= plugin_var_bookmark_key(flags);
result= (st_bookmark*) my_hash_search(&bookmark_hash,
(const uchar*) varname, length - 1);
@ -2813,7 +2819,7 @@ static st_bookmark *register_var(const char *plugin, const char *name,
{
result= (st_bookmark*) alloc_root(&plugin_mem_root,
sizeof(struct st_bookmark) + length-1);
varname[0]= flags & PLUGIN_VAR_BOOKMARK_KEY;
varname[0]= plugin_var_bookmark_key(flags);
memcpy(result->key, varname, length);
result->name_len= length - 2;
result->offset= -1;
@ -2935,7 +2941,7 @@ static uchar *intern_sys_var_ptr(THD* thd, int offset, bool global_lock)
if (!(var= intern_find_sys_var(v->key + 1, v->name_len)) ||
!(pi= var->cast_pluginvar()) ||
v->key[0] != (pi->plugin_var->flags & PLUGIN_VAR_BOOKMARK_KEY))
v->key[0] != plugin_var_bookmark_key(pi->plugin_var->flags))
continue;
/* Here we do anything special that may be required of the data types */
@ -3072,7 +3078,7 @@ static void cleanup_variables(THD *thd, struct system_variables *vars)
DBUG_ASSERT((uint)v->offset <= vars->dynamic_variables_head);
if ((v->key[0] & PLUGIN_VAR_TYPEMASK) == PLUGIN_VAR_STR &&
v->key[0] & PLUGIN_VAR_MEMALLOC)
v->key[0] & BOOKMARK_MEMALLOC)
{
char **ptr= (char**)(vars->dynamic_variables_ptr + v->offset);
my_free(*ptr);