DL::PtrData#to_a dumps core

Ruby Development
1

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DL::PtrData e$B$,0J2<$N$h$&$K$9$k$He(B core e$B$rEG$-$^$9!#e(B
PtrData e$B%/%i%9$O%]%$%s%?!<$N%i%C%Q!<$G$9$+$i!"07$$<!Bh$G$Oe(B
core e$B$rEG$$$F$7$^$&$N$O;EJ}$,$J$$$H;W$&$N$G$9$,!“0J2<$N>l9g$Ke(B core
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$ 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;
2

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 ã‚’åã„ã¦ã—ã¾ã†ã®ã¯ä»•æ–¹ãŒãªã„ã¨æ€ã†ã®ã§ã™ãŒã€ä»¥ä¸‹ã®å ´åˆã« core ã‚’
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。

ruby 1.8.6 (2007-03-05) [i686-linux]
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
[email protected]

–
/
/__ __ Akinori.org / MUSHA.org
/ ) ) ) ) / FreeBSD.org / Ruby-lang.org
Akinori MUSHA aka / (_ / ( (__( @ iDaemons.org / and.or.jp

“Different eyes see different things,
Different hearts beat on different strings –
But there are times for you and me when all such things agree”

3

Akinori MUSHA wrote:

DL::PtrData e$B$,0J2<$N$h$&$K$9$k$He(B core e$B$rEG$-$^$9!#e(B
PtrData e$B%/%i%9$O%]%$%s%?!<$N%i%C%Q!<$G$9$+$i!"07$$<!Bh$G$Oe(B
core e$B$rEG$$$F$7$^$&$N$O;EJ}$,$J$$$H;W$&$N$G$9$,!“0J2<$N>l9g$Ke(B core e$B$re(B
e$BEG$$$F$7$^$&$N$O!”%P%0$J$s$8$c$J$$$+$H;W$$$^$9!#e(B

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

Bugfix for PR#1196

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4

Takaaki T. wrote:

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