Function plugin_init

sql/sql_plugin.cc:1591–1848

The logic is that we first load and initialize all compiled in plugins. From there we load up the dynamic types (assuming we have not been told to skip this part). Finally we initialize everything, aka the dynamic that have yet to initialize. */

  Finally we initialize everything, aka the dynamic that have yet to initialize.
*/
int plugin_init(int *argc, char **argv, int flags)
{
  size_t i;
  struct st_maria_plugin **builtins;
  struct st_maria_plugin *plugin;
  struct st_plugin_int tmp, *plugin_ptr, **reap, **retry_end, **retry_start;
  MEM_ROOT tmp_root;
  bool reaped_mandatory_plugin= false;
  bool mandatory= true;
  I_List_iterator<i_string> opt_plugin_load_list_iter(opt_plugin_load_list);
  char plugin_table_engine_name_buf[NAME_CHAR_LEN + 1];
  LEX_CSTRING plugin_table_engine_name= { plugin_table_engine_name_buf, 0 };
  LEX_CSTRING MyISAM= { STRING_WITH_LEN("MyISAM") };
  DBUG_ENTER("plugin_init");

  if (initialized)
    DBUG_RETURN(0);

  dlopen_count =0;

  init_plugin_psi_keys();

  init_alloc_root(key_memory_plugin_mem_root, &plugin_mem_root, 4096, 16384, MYF(0));
  init_alloc_root(key_memory_plugin_mem_root, &plugin_vars_mem_root, 4096, 32768, MYF(0));
  init_alloc_root(PSI_NOT_INSTRUMENTED, &tmp_root, 16384, 32768, MYF(0));

  if (my_hash_init(key_memory_plugin_bookmark, &bookmark_hash, &my_charset_bin, 32, 0, 0,
                   get_bookmark_hash_key, NULL, HASH_UNIQUE))
      goto err;

  /*
    The 80 is from 2016-04-27 when we had 71 default plugins
    Big enough to avoid many mallocs even in future
  */
  if (my_init_dynamic_array(key_memory_mysql_plugin_dl, &plugin_dl_array,
                            sizeof(struct st_plugin_dl *), 16, 16, MYF(0)) ||
      my_init_dynamic_array(key_memory_mysql_plugin, &plugin_array,
                            sizeof(struct st_plugin_int *), 80, 32, MYF(0)))
    goto err;

  for (i= 0; i < MYSQL_MAX_PLUGIN_TYPE_NUM; i++)
  {
    if (my_hash_init(key_memory_plugin_mem_root, &plugin_hash[i],
                     Lex_ident_plugin::charset_info(),
                     32, 0, 0,
                     get_plugin_hash_key, NULL, HASH_UNIQUE))
      goto err;
  }

  /* prepare debug_sync service */
  DBUG_ASSERT(strcmp(list_of_services[1].name, "debug_sync_service") == 0);
  list_of_services[1].service= *(void**)&debug_sync_C_callback_ptr;

  /* prepare encryption_keys service */
  finalize_encryption_plugin(0);

  mysql_mutex_lock(&LOCK_plugin);