Bug#11761576 54082: HANDLE_SEGFAULT MAKES USE OF UNSAFE FUNCTIONS

handle_segfault is the signal handler code of mysqld.  however, it makes
calls to potentially unsafe functions localtime_r, fprintf, fflush.



include/my_stacktrace.h:
  Add safe versions of itoa() write() and snprintf().
libmysqld/CMakeLists.txt:
  Move signal handler to separate file.
mysys/stacktrace.c:
  Remove unsafe function calls.
sql/CMakeLists.txt:
  Move signal handler to separate file.
sql/mysqld.cc:
  Move signal handler to separate file.
sql/set_var.h:
  Add missing #include dependency.
sql/sys_vars.cc:
  Cleanup .h and .cc files.
sql/sys_vars.h:
  Cleanup .h and .cc files.

1 files changed, 0 insertions, 71 deletions

diff --git a/sql/sys_vars.h b/sql/sys_vars.h
index 14d99407f37..98ff5f9fa02 100644
--- a/sql/sys_vars.h
+++ b/sql/sys_vars.h
@@ -72,7 +72,6 @@
 enum charset_enum {IN_SYSTEM_CHARSET, IN_FS_CHARSET};
 
 static const char *bool_values[3]= {"OFF", "ON", 0};
-TYPELIB bool_typelib={ array_elements(bool_values)-1, "", bool_values, 0 };
 
 /**
   A small wrapper class to pass getopt arguments as a pair
@@ -710,76 +709,6 @@ public:
   }
 };
 
-static bool update_buffer_size(THD *thd, KEY_CACHE *key_cache,
-                               ptrdiff_t offset, ulonglong new_value)
-{
-  bool error= false;
-  DBUG_ASSERT(offset == offsetof(KEY_CACHE, param_buff_size));
-
-  if (new_value == 0)
-  {
-    if (key_cache == dflt_key_cache)
-    {
-      my_error(ER_WARN_CANT_DROP_DEFAULT_KEYCACHE, MYF(0));
-      return true;
-    }
-
-    if (key_cache->key_cache_inited)            // If initied
-    {
-      /*
-        Move tables using this key cache to the default key cache
-        and clear the old key cache.
-      */
-      key_cache->in_init= 1;
-      mysql_mutex_unlock(&LOCK_global_system_variables);
-      key_cache->param_buff_size= 0;
-      ha_resize_key_cache(key_cache);
-      ha_change_key_cache(key_cache, dflt_key_cache);
-      /*
-        We don't delete the key cache as some running threads my still be in
-        the key cache code with a pointer to the deleted (empty) key cache
-      */
-      mysql_mutex_lock(&LOCK_global_system_variables);
-      key_cache->in_init= 0;
-    }
-    return error;
-  }
-
-  key_cache->param_buff_size= new_value;
-
-  /* If key cache didn't exist initialize it, else resize it */
-  key_cache->in_init= 1;
-  mysql_mutex_unlock(&LOCK_global_system_variables);
-
-  if (!key_cache->key_cache_inited)
-    error= ha_init_key_cache(0, key_cache);
-  else
-    error= ha_resize_key_cache(key_cache);
-
-  mysql_mutex_lock(&LOCK_global_system_variables);
-  key_cache->in_init= 0;
-
-  return error;
-}
-
-static bool update_keycache_param(THD *thd, KEY_CACHE *key_cache,
-                                  ptrdiff_t offset, ulonglong new_value)
-{
-  bool error= false;
-  DBUG_ASSERT(offset != offsetof(KEY_CACHE, param_buff_size));
-
-  keycache_var(key_cache, offset)= new_value;
-
-  key_cache->in_init= 1;
-  mysql_mutex_unlock(&LOCK_global_system_variables);
-  error= ha_resize_key_cache(key_cache);
-
-  mysql_mutex_lock(&LOCK_global_system_variables);
-  key_cache->in_init= 0;
-
-  return error;
-}
-
 /**
   The class for floating point variables