From 815e8e992dd3beb427abc0985ff500bf71ca4da3 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 18 Jun 2016 04:40:15 +0000
Subject: Refine test of r55432

* test/stringio/test_stringio.rb (test_overflow): refine the
  conditinon, try to allocate strings until the buffer is located
  in higher half address.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55439 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/stringio/test_stringio.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'test')

diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index ce84800d4b..5dd5de988a 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -686,7 +686,13 @@ class TestStringIO < Test::Unit::TestCase
     assert_separately(%w[-rstringio], "#{<<-"begin;"}\n#{<<-"end;"}")
     begin;
       limit = #{limit}
-      x = ("a"*0x100000)
+      ary = []
+      while true
+        x = "a"*0x100000
+        break if [x].pack("p").unpack("i!")[0] < 0
+        ary << x
+        skip if ary.size > 1000
+      end
       s = StringIO.new(x)
       s.gets("xxx", limit)
       assert_equal(0x100000, s.pos)
-- 
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