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yarv-dev:1106

From: SASADA Koichi <ko1 atdot.net>
Date: Tue, 14 Nov 2006 11:26:27 +0900
Subject: [yarv-dev:1106] Re: long method-chain causes segv

　ささだです。

　うーん、コンパイル時に落ちるのか。ちょっと見てみます。

Tadashi Saito wrote:
> こんばんは。斎藤と申します。
> 
> ええと、暗黒面をもう一つ。
> 
> たしかクラック前のruby-lang.orgバグトラッカーに登録したのですが、「少な
> くともVMが変わらないと解決できません」とまつもとさんに言われたものです。
> 
> 以下のようにして、10万回ひたすらメソッドをチェーンさせるスクリプトを生成
> して
> 
> $ ruby -e 'puts "a=nil; def a.a; self; end"; (10**5).times{puts "a."};
> puts "a"' >long_chain.rb
> 
> 動かすと
> 
> $ ruby-yarv -v long_chain.rb
> ruby 1.9.0 (Base: Ruby 1.9.0 2006-11-06) [i686-linux]
> YARVCore 0.4.1 Rev: 578 (2006-11-09) [opts: [direct threaded code]
> [inline method cache] ]
> セグメンテーション違反です (core dumped)
> 
> 落ちます。
> 
> $ gdb ruby-yarv
> GNU gdb 6.3-debian
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are welcome to change it and/or distribute copies of it under
> certain conditions. Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details. This GDB was configured as "i386-linux"...Using host
> libthread_db library "/lib/tls/libthread_db.so.1".
> 
> (gdb) run long_chain.rb
> Starting program: /usr/local/bin/ruby-yarv long_chain.rb
> [Thread debugging using libthread_db enabled]
> [New Thread 1076622432 (LWP 7936)]
> [New Thread 1076640688 (LWP 7939)]
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1076622432 (LWP 7936)]
> iseq_compile_each (iseq=0x80c0160, ret=0xbf800310, node=0x40548f2c,
> poped=0) at ../compile.c:2480
> 2480    {
> (gdb) l
> 2475      node:  Ruby compiled node
> 2476      poped: This node will be poped
> 2477     */
> 2478    static int
> 2479    iseq_compile_each(yarv_iseq_t *iseq, LINK_ANCHOR *ret, NODE *
> node, int poped)
> 2480    {
> 2481        VALUE tmp;                  /* reserved for macro */
> 2482        int type;
> 2483
> 2484        GC_CHECK();
> (gdb) q
> The program is running.  Exit anyway? (y or n) y
> $ gdb ruby-yarv
> GNU gdb 6.3-debian
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are welcome to change it and/or distribute copies of it under
> certain conditions. Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details. This GDB was configured as "i386-linux"...Using host
> libthread_db library "/lib/tls/libthread_db.so.1".
> 
> (gdb) run long_chain.rb
> Starting program: /usr/local/bin/ruby-yarv long_chain.rb
> [Thread debugging using libthread_db enabled]
> [New Thread 1076622432 (LWP 7945)]
> [New Thread 1076640688 (LWP 7948)]
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1076622432 (LWP 7945)]
> iseq_compile_each (iseq=0x80c0160, ret=0xbf800310, node=0x40548f2c,
> poped=0) at ../compile.c:2480
> 2480    {
> (gdb) l
> 2475      node:  Ruby compiled node
> 2476      poped: This node will be poped
> 2477     */
> 2478    static int
> 2479    iseq_compile_each(yarv_iseq_t *iseq, LINK_ANCHOR *ret, NODE *
> node, int poped) 2480    {
> 2481        VALUE tmp;                  /* reserved for macro */
> 2482        int type;
> 2483
> 2484        GC_CHECK();
> (gdb) bt
> #0  iseq_compile_each (iseq=0x80c0160, ret=0xbf800310, node=0x40548f2c,
>     poped=0) at ../compile.c:2480
> #1  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf800630,
>     node=0x40548eb4, poped=0) at ../compile.c:3473
> #2  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf800950,
>     node=0x40548e14, poped=0) at ../compile.c:3473
> #3  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf800c70,
>     node=0x40548d9c, poped=0) at ../compile.c:3473
> #4  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf800f90,
>     node=0x40548d10, poped=0) at ../compile.c:3473
> #5  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf8012b0,
>     node=0x40548c98, poped=0) at ../compile.c:3473
> #6  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf8015d0,
>     node=0x40548bf8, poped=0) at ../compile.c:3473
> #7  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf8018f0,
>     node=0x40548b80, poped=0) at ../compile.c:3473
> #8  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf801c10,
>     node=0x40548af4, poped=0) at ../compile.c:3473
> #9  0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf801f30,
>     node=0x40548a7c, poped=0) at ../compile.c:3473
> #10 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf802250,
>     node=0x405489dc, poped=0) at ../compile.c:3473
> #11 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf802570,
> ---Type <return> to continue, or q <return> to quit---q
> node=0x4054Quit
> ) at ../compile.c:3473
> #12 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf802890,
>     node=0x405488d8, poped=0) at ../compile.c:3473
> #13 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf802bb0,
>     node=0x40548860, poped=0) at ../compile.c:3473
> #14 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf802ed0,
>     node=0x405487c0, poped=0) at ../compile.c:3473
> #15 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf8031f0,
>     node=0x40548748, poped=0) at ../compile.c:3473
> #16 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf803510,
>     node=0x405486bc, poped=0) at ../compile.c:3473
> #17 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf803830,
>     node=0x40548644, poped=0) at ../compile.c:3473
> #18 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf803b50,
>     node=0x405485a4, poped=0) at ../compile.c:3473
> #19 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf803e70,
>     node=0x4054852c, poped=0) at ../compile.c:3473
> #20 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf804190,
>     node=0x405484a0, poped=0) at ../compile.c:3473
> #21 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf8044b0,
>     node=0x40548428, poped=0) at ../compile.c:3473
> #22 0x400d07c4 in iseq_compile_each (iseq=0x80c0160, ret=0xbf8047d0,
>     node=0x40548388, poped=0) at ../compile.c:3473
> ---Type <return> to continue, or q <return> to quit---q
> Quit
> (gdb) q
> The program is running.  Exit anyway? (y or n) y
> 
> ちなみに[powerpc-darwin8.8.0]でも同様でした。何かの参考になれば幸い
> です。
> 
> # とかいう上記のような、英語でもどうでもいいようなメールは、-enの方に
> # 投げた方がいいでしょうか? 望ましいなら以後、そうします。
> 


-- 
// SASADA Koichi at atdot dot net


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      1104 2006-11-09 20:42 [shiba mail2.accsnet.] long method-chain causes segv           
->    1106 2006-11-14 11:26 ┗[ko1 atdot.net       ]