ruby-dev

ttateさんにCCします。

At Mon, 12 Mar 2007 00:14:20 +0900,
sheepman wrote:
> こんばんは、sheepman です。
>
> DL::PtrData が以下のようにすると core を吐きます。
> PtrData クラスはポインターのラッパーですから、扱い次第では
> core を吐いてしまうのは仕方がないと思うのですが、以下の場合に core を
> 吐いてしまうのは、バグなんじゃないかと思います。
>
> 仕様なんでしょうか?

r4831 | ttate | 2003-10-22 23:29:20 +0900 (Wed, 22 Oct 2003) | 2 lines

Bugfix for PR#1196

というコミットに何か意図がありそうですが、どうでしょうね。


> とりあえず、パッチを添付します。
>
> $ cat t2.rb
> require "dl"
> sp = ['a', 'b', 'c'].to_ptr
> sp.to_a('S')
>
> $ ruby-1.8 -v t2.rb
> ruby 1.8.6 (2007-03-05 patchlevel 5000) [i686-linux]
> t2.rb:3: [BUG] Segmentation fault
> ruby 1.8.6 (2007-03-05) [i686-linux]
>
> zsh: abort      ruby-1.8 -v t2.rb
>
> $ svn diff ext/dl/ptr.c
> Index: ext/dl/ptr.c
> ===================================================================
> --- ext/dl/ptr.c        (revision 12023)
> +++ ext/dl/ptr.c        (working copy)
> @@ -344,7 +344,7 @@
>        n = data->size / sizeof(void*);
>        break;
>      case 'S': case 's':
> -      for (n=0; ((void**)(data->ptr))[n]; n++) {};
> +      n = data->size / sizeof(char*);
>        break;
>      default:
>         n = 0;
>
> --
> sheepman / TAMURA Takashi
> sheepman@sheepman.sakura.ne.jp

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