From: "phasis68 (Heesob Park)" <phasis@...>
Date: 2012-04-16T22:27:37+09:00
Subject: [ruby-core:44389] [ruby-trunk - Bug #6303]  dln_load and rb_w32_check_imported cause segfault in Ruby 1.9.3 for some extension


Issue #6303 has been updated by phasis68 (Heesob Park).


The changeset r35352 is not same to my patch and the bug #6303 is not fixed.

After applying  r35352,
require 'mswin32/ibm_db' 
falls into infinite loop and runs forever.

The line
if (IMAGE_SNAP_BY_ORDINAL(pint->u1.Ordinal)) continue;

should be

if (IMAGE_SNAP_BY_ORDINAL(pint->u1.Ordinal)) {pint++;piat++;continue;}



----------------------------------------
Bug #6303:  dln_load and rb_w32_check_imported cause segfault in Ruby 1.9.3 for some extension
https://bugs.ruby-lang.org/issues/6303#change-25935

Author: luislavena (Luis Lavena)
Status: Closed
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: 


 Hello,
 
 NOTE: Reporting this here since bugs.ruby-lang.org seems to be down.
 
 Recently a user reported to RubyInstaller project issues when loading
 a Ruby 1.9.2 compiled extension under Ruby 1.9.3:
 
 https://groups.google.com/d/msg/rubyinstaller/aSezE2LwfQs/TDZvPG3X5mUJ
 
 Which I was able to study a bit better:
 https://groups.google.com/d/msg/rubyinstaller/aSezE2LwfQs/UGKlButpNfMJ
 
 To add more, my last comment was:
 
 "Is worth to mention that this do not fail against 1.9.2 (either
 building or running) but dln_load mechanism on Ruby 1.9.2 differs from
 Ruby 1.9.3 and highly unlikely is going to change."
 
 I'm not convinced by my last comment and I do believe this is a bug.
 db2cli.dll links to MSVCR80 and even so, it loads properly under
 1.9.2.
 
 Looking closely to what rb_w32_check_imported does, it is supposed to
 verify that the extension being loaded it is indeed using the right
 ruby dll.
 
 But is failing to obtain Name from pii (PIMAGE_IMPORT_BY_NAME struct)
 
 I can't find any reference to dbghelp (which provides
 ImageDirectoryEntryToData) being included or linked in
 msvcrt-libruby191.dll
 
 For sure I'm missing something, specially why is failing to obtain
 this extension information when works for others.
 
 Thank you.
 -- 
 Luis Lavena
 AREA 17
 -
 Perfection in design is achieved not when there is nothing more to add,
 but rather when there is nothing more to take away.
 Antoine de Saint-Exup��ry


-- 
http://bugs.ruby-lang.org/