bzr commit into mysql-5.1-bugteam branch (Dmitry.Shulga:3548) Bug#57386

[Dmitry Shulga]

#At file:///Users/shulga/projects/mysql/5.1-bugteam-bug57386/ based on revid:anitha.gopi@stripped

 3548 Dmitry Shulga	2010-10-29
      Fixed Bug#57386 - main.execution_constants segfault on MIPS64EL.
     @ sql/item_func.cc
        Item_func::fix_fields modified: increased minimal required stack
        size in call to check_stack_overrun().

    modified:
      sql/item_func.cc
=== modified file 'sql/item_func.cc'
--- a/sql/item_func.cc	2010-10-05 08:11:56 +0000
+++ b/sql/item_func.cc	2010-10-29 03:08:46 +0000
@@ -157,7 +157,14 @@ Item_func::fix_fields(THD *thd, Item **r
   used_tables_cache= not_null_tables_cache= 0;
   const_item_cache=1;
 
-  if (check_stack_overrun(thd, STACK_MIN_SIZE, buff))
+  /*
+    Increase stack limit to STACK_MIN_SIZE * 2 since
+    on some platforms recursive call to fix_fields
+    required more than STACK_MIN_SIZE bytes (e.g. for
+    MIPS, where needs about 22kB for 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


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