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List: ruby-core
Subject: [ruby-core:66566] [ruby-trunk - Feature #8543] rb_iseq_load
From: s.wanabe () gmail ! com
Date: 2014-11-29 11:55:19
Message-ID: redmine.journal-50180.20141129115518.52ab0b9abb839a22 () ruby-lang ! org
[Download RAW message or body]
Issue #8543 has been updated by _ wanabe.
https://github.com/ruby/ruby/blob/33ea2646b98adb49ae2e1781753bf22d33729ac0/iseq.c#L1720
iseq_data_to_ary() ignores hidden variables named by id_internal().
It seems to be mismatched for the variable that recieving keyword arguments, for \
aforementioned reason. How about push rb_uint_new(lid) when rb_id2str(lid) is false?
----------------------------------------
Feature #8543: rb_iseq_load
https://bugs.ruby-lang.org/issues/8543#change-50180
* Author: Alexey Voskov
* Status: Open
* Priority: Low
* Assignee: Koichi Sasada
* Category: YARV
* Target version: current: 2.2.0
----------------------------------------
I noticed an unusual behaviour of undocumented rb_iseq_load function.
Its work differs in different Ruby versions. I'm trying to protect some Ruby
source code by its conversion to YARV p-code and using the next strategy:
1. Convert code to array
~~~ruby
data = RubyVM::InstructionSequence.compile_file('hello.rb').to_a
~~~
2. Pass a compiled source to the rb_iseq_load function and evaluate it
~~~ruby
iseq = iseq_load.(data)
iseq.eval
~~~
Sample programs are supplied in the attachments.
"hello.rb"
```ruby
puts "tralivali"
def funct(a,b)
a**b
end
3.times { |i|
puts "Hello, world#{funct(2,i)}!"
}
```
The differences
Ruby 1.9.3 (ruby 1.9.3p194 (2012-04-20) [i386-mingw32])
Correct work. Output:
```
tralivali
Hello, world1!
Hello, world2!
Hello, world4!
```
Ruby 2.0.0 (ruby 2.0.0p193 (2013-05-14) [x64-mingw32])
Incorrect work (omits the code inside code blocks). Output
```
tralivali
```
Attempts of loading bigger programs by means of rb_iseq_load in Ruby 2.0.0 usually \
ends with a segmentation fault.
Such behaviour also can be reproduced by means of iseq Ruby extension ("for iseq \
freaks") https://github.com/wanabe/iseq
P.S. I understand that it is an undocumented feature.
---Files--------------------------------
hello.rb (102 Bytes)
rb_pack.rb (931 Bytes)
iseq-load-test3.rb (210 Bytes)
iseq-load-test3-file.rb (369 Bytes)
please-fix-rb_iseq_load-thank-you.pdf (444 KB)
--
https://bugs.ruby-lang.org/
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