Bug#45445: cannot execute procedures with thread_stack set to 128k.

Reverting the patch.

sql/sp.cc

@@ -779,9 +779,6 @@ db_load_routine(THD *thd, int type, sp_name *name, sp_head **sphp,
 
   int ret= 0;
 
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, (uchar*)&ret))
-    return TRUE;
-
   thd->lex= &newlex;
   newlex.current_select= NULL;
 
@@ -1611,9 +1608,6 @@ sp_find_routine(THD *thd, int type, sp_name *name, sp_cache **cp,
                        (int) name->m_name.length, name->m_name.str,
                        type, cache_only));
 
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, (uchar*)&depth))
-    return NULL;
-
   if ((sp= sp_cache_lookup(cp, name)))
   {
     ulong level;

sql/sp_head.cc

@@ -1240,8 +1240,11 @@ sp_head::execute(THD *thd, bool merge_da_on_success)
     The same with db_load_routine() required circa 7k bytes and
     14k bytes accordingly. Hence, here we book the stack with some
     reasonable margin.
+
+    Reverting back to 8 * STACK_MIN_SIZE until further fix.
+    8 * STACK_MIN_SIZE is required on some exotic platforms.
   */
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, (uchar*)&old_packet))
+  if (check_stack_overrun(thd, 8 * STACK_MIN_SIZE, (uchar*)&old_packet))
     DBUG_RETURN(TRUE);
 
   /* init per-instruction memroot */
@@ -2915,9 +2918,6 @@ sp_lex_keeper::reset_lex_and_exec_core(THD *thd, uint *nextp,
     It's merged with the saved parent's value at the exit of this func.
   */
   bool parent_modified_non_trans_table= thd->transaction.stmt.modified_non_trans_table;
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, (uchar*)&parent_modified_non_trans_table))
-    DBUG_RETURN(TRUE);
-
   thd->transaction.stmt.modified_non_trans_table= FALSE;
   DBUG_ASSERT(!thd->derived_tables);
   DBUG_ASSERT(thd->change_list.is_empty());
@@ -3073,9 +3073,6 @@ sp_instr_stmt::execute(THD *thd, uint *nextp)
   DBUG_ENTER("sp_instr_stmt::execute");
   DBUG_PRINT("info", ("command: %d", m_lex_keeper.sql_command()));
 
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, (uchar*)&res))
-    DBUG_RETURN(TRUE);
-
   const CSET_STRING query_backup= thd->query_string;
 #if defined(ENABLED_PROFILING)
   /* This s-p instr is profilable and will be captured. */

sql/sql_parse.cc

@@ -7209,9 +7209,6 @@ bool parse_sql(THD *thd,
 
   Object_creation_ctx *backup_ctx= NULL;
 
-  if (check_stack_overrun(thd, 2 * STACK_MIN_SIZE, (uchar*)&backup_ctx))
-    return TRUE;
-
   if (creation_ctx)
     backup_ctx= creation_ctx->set_n_backup(thd);