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marshal.c: no overwriting ivars

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* marshal.c (copy_ivar_i): get rid of overwriting already copied
  instance variales.  c.f. [Bug #8276]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40559 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2013-05-02 08:32:48 +00:00
parent b996367eb5
commit 5e79c1a543
3 changed files with 29 additions and 8 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Thu May 2 17:32:45 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* marshal.c (copy_ivar_i): get rid of overwriting already copied
instance variales. c.f. [Bug #8276]
Thu May 2 16:55:43 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* thread.c (id_locals): use cached ID.

6
marshal.c
View file

@ -1373,7 +1373,11 @@ r_leave(VALUE v, struct load_arg *arg)
static int
copy_ivar_i(st_data_t key, st_data_t val, st_data_t arg)
{
rb_ivar_set((VALUE)arg, (ID)key, (VALUE)val);
VALUE obj = (VALUE)arg, value = (VALUE)val;
ID vid = (ID)key;
if (!rb_ivar_defined(obj, vid))
rb_ivar_set(obj, vid, value);
return ST_CONTINUE;
}

26
test/ruby/test_marshal.rb
View file

@ -555,6 +555,16 @@ class TestMarshal < Test::Unit::TestCase
alias marshal_load initialize
end
class FrozenData < LoadData
def marshal_load(data)
super
data.instance_variables.each do |iv|
instance_variable_set(iv, data.instance_variable_get(iv))
end
freeze
end
end
def test_marshal_dump_excess_encoding
bug8276 = '[ruby-core:54334] [Bug #8276]'
t = Bug8276.new(bug8276)
@ -574,18 +584,20 @@ class TestMarshal < Test::Unit::TestCase
def test_marshal_load_ivar
s = "data with ivar"
s.instance_variable_set(:@t, 42)
t = LoadData.new(s)
s = Marshal.dump(t)
hook = ->(v) {
if LoadData === v
assert_send([v, :instance_variable_defined?, :@t])
assert_equal(42, v.instance_variable_get(:@t))
assert_send([v, :instance_variable_defined?, :@t], v.class.name)
assert_equal(42, v.instance_variable_get(:@t), v.class.name)
end
v
}
v = Marshal.load(s, hook)
assert_send([v, :instance_variable_defined?, :@t])
assert_equal(42, v.instance_variable_get(:@t))
[LoadData, FrozenData].each do |klass|
t = klass.new(s)
d = Marshal.dump(t)
v = assert_nothing_raised(RuntimeError) {break Marshal.load(d, hook)}
assert_send([v, :instance_variable_defined?, :@t], klass.name)
assert_equal(42, v.instance_variable_get(:@t), klass.name)
end
end
def test_class_ivar