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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-12-20 06:44:50 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-12-20 06:44:50 +0000
commitec7b1e475b1f8cb3ca775fec27227c6761d3b203 (patch)
treee9076717079404af996b46dce24cded888dfc0b6 /test
parentf89238ec0d689f3989c55c4716da500b8c898900 (diff)
Freeze hash literals embedded in duphash instructions
Previously, these hash literals were not frozen, and thus could be modified by ObjectSpace, resulting in undesired behavior. Example: ```ruby require 'objspace' def a(b={0=>1,1=>4,2=>17}) b end p a ObjectSpace.each_object(Hash) do |a| a[3] = 8 if a.class == Hash && a[0] == 1 && a[1] == 4 && a[2] == 17 end p a ``` It may be desirable to hide such hashes from ObjectSpace, since they are internal, but I'm not sure how to do that. From: Jeremy Evans <code@jeremyevans.net> git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66464 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
-rw-r--r--test/ruby/test_literal.rb16
1 files changed, 16 insertions, 0 deletions
diff --git a/test/ruby/test_literal.rb b/test/ruby/test_literal.rb
index ef2467e1772..37755422a14 100644
--- a/test/ruby/test_literal.rb
+++ b/test/ruby/test_literal.rb
@@ -283,6 +283,22 @@ class TestRubyLiteral < Test::Unit::TestCase
assert_equal "literal", h["string"]
end
+ def frozen_hash_literal_arg
+ {0=>1,1=>4,2=>17}
+ end
+
+ def test_hash_literal_frozen
+ assert_not_include frozen_hash_literal_arg, 3
+ assert_raise(FrozenError) do
+ ObjectSpace.each_object(Hash) do |a|
+ if a.class == Hash and !a.default_proc and a.size == 3
+ a[3] = 8 if a[0] == 1 and a[1] == 4 and a[2] == 17
+ end
+ end
+ end
+ assert_not_include frozen_hash_literal_arg, 3
+ end
+
def test_big_array_and_hash_literal
assert_normal_exit %q{GC.disable=true; x = nil; raise if eval("[#{(1..1_000_000).map{'x'}.join(", ")}]").size != 1_000_000}, "", timeout: 300, child_env: %[--disable-gems]
assert_normal_exit %q{GC.disable=true; x = nil; raise if eval("[#{(1..1_000_000).to_a.join(", ")}]").size != 1_000_000}, "", timeout: 300, child_env: %[--disable-gems]