From 5b3e668af8b1bc44cd5379f425bed38809361d5f Mon Sep 17 00:00:00 2001
From: Dmitry Shulga <Dmitry.Shulga@oracle.com>
Date: Wed, 10 Nov 2010 11:49:37 +0600
Subject: [PATCH] Fixed Bug#57386 - main.execution_constants segfault on
 MIPS64EL.

---
 sql/item_func.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sql/item_func.cc b/sql/item_func.cc
index eaf6a1b6d14..d8b5d46938e 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -157,7 +157,14 @@ Item_func::fix_fields(THD *thd, Item **ref)
   used_tables_cache= not_null_tables_cache= 0;
   const_item_cache=1;
 
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, buff))
+  /*
+    Use stack limit of STACK_MIN_SIZE * 2 since
+    on some platforms a recursive call to fix_fields
+    requires more than STACK_MIN_SIZE bytes (e.g. for
+    MIPS, it takes about 22kB to make one recursive
+    call to Item_func::fix_fields())
+  */
+  if (check_stack_overrun(thd, STACK_MIN_SIZE * 2, buff))
     return TRUE;				// Fatal error if flag is set!
   if (arg_count)
   {						// Print purify happy