From: Kazuhiko <kazuhiko@...>
Date: 2003-12-26T10:46:18+09:00
Subject: [ruby-list:38999] Re: RubyEB が ruby-1.8.1 で SEGV

かずひこです。

At Fri, 26 Dec 2003 10:01:15 +0900,
Yukihiro Matsumoto wrote:

>   valgrind ruby <args..>
> 
> の出力を見せてください。

# 環境についてさらにいい忘れていましたが、eb library (4.0beta3) も、-
# -enable-pthreads つきでビルドしています。

valgrind-2.0.0 を使って、test.rb のケース (止まってしまう) では以下のよ
うな出力になりました。

==2544== Invalid write of size 4
==2544==    at 0x40227A99: __pthread_mutex_init (vg_libpthread.c:934)
==2544==    by 0x41790F5F: eb_initialize_lock (in /usr/lib/libeb.so.8.0.0)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544==    by 0x805BA8C: rb_call0 (eval.c:5066)
==2544==    Address 0x415EFA04 is 4 bytes after a block of size 3372 alloc'd
==2544==    at 0x40027BCE: malloc (vg_replace_malloc.c:153)
==2544==    by 0x806AC81: ruby_xmalloc (gc.c:116)
==2544==    by 0x4083D7CE: reb_initialize (eb.c:140)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544== 
==2544== Invalid write of size 4
==2544==    at 0x40227AA0: __pthread_mutex_init (vg_libpthread.c:935)
==2544==    by 0x41790F5F: eb_initialize_lock (in /usr/lib/libeb.so.8.0.0)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544==    by 0x805BA8C: rb_call0 (eval.c:5066)
==2544==    Address 0x415EFA08 is 8 bytes after a block of size 3372 alloc'd
==2544==    at 0x40027BCE: malloc (vg_replace_malloc.c:153)
==2544==    by 0x806AC81: ruby_xmalloc (gc.c:116)
==2544==    by 0x4083D7CE: reb_initialize (eb.c:140)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544== 
==2544== Invalid write of size 4
==2544==    at 0x40227AA7: __pthread_mutex_init (vg_libpthread.c:936)
==2544==    by 0x41790F5F: eb_initialize_lock (in /usr/lib/libeb.so.8.0.0)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544==    by 0x805BA8C: rb_call0 (eval.c:5066)
==2544==    Address 0x415EFA0C is 12 bytes after a block of size 3372 alloc'd
==2544==    at 0x40027BCE: malloc (vg_replace_malloc.c:153)
==2544==    by 0x806AC81: ruby_xmalloc (gc.c:116)
==2544==    by 0x4083D7CE: reb_initialize (eb.c:140)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544== 
==2544== Invalid write of size 4
==2544==    at 0x40227A99: __pthread_mutex_init (vg_libpthread.c:934)
==2544==    by 0x41790F6C: eb_initialize_lock (in /usr/lib/libeb.so.8.0.0)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544==    by 0x805BA8C: rb_call0 (eval.c:5066)
==2544==    Address 0x415EFA1C is not stack'd, malloc'd or free'd
==2544== 
==2544== Invalid write of size 4
==2544==    at 0x40227AA0: __pthread_mutex_init (vg_libpthread.c:935)
==2544==    by 0x41790F6C: eb_initialize_lock (in /usr/lib/libeb.so.8.0.0)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544==    by 0x805BA8C: rb_call0 (eval.c:5066)
==2544==    Address 0x415EFA20 is not stack'd, malloc'd or free'd
==2544== 
==2544== Invalid write of size 4
==2544==    at 0x40227AA7: __pthread_mutex_init (vg_libpthread.c:936)
==2544==    by 0x41790F6C: eb_initialize_lock (in /usr/lib/libeb.so.8.0.0)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)
==2544==    by 0x805BA8C: rb_call0 (eval.c:5066)
==2544==    Address 0x415EFA24 is not stack'd, malloc'd or free'd

valgrind: vg_malloc2.c:632 (unlinkBlock): Assertion `get_next_p(b) == b' failed.

sched status:

Thread 1: status = Runnable, associated_mx = 0x0, associated_cv = 0x0
==2544==    at 0x40027BCE: malloc (vg_replace_malloc.c:153)
==2544==    by 0x806AC81: ruby_xmalloc (gc.c:116)
==2544==    by 0x4083D80D: reb_initialize (eb.c:143)
==2544==    by 0x8066855: call_cfunc (eval.c:4929)

ちなみに、--enable-pthreads なしの ruby-1.8.1 (止まらずにちゃんと動作す
る) ではこんな感じの出力でした。

==2592== Invalid write of size 4
==2592==    at 0x417160E3: eb_initialize_alt_caches (in /usr/lib/libeb.so.8.0.0)
==2592==    by 0x40277143: call_cfunc (in /usr/lib/libruby.so.1.8.1)
==2592==    by 0x40269DE5: rb_call0 (in /usr/lib/libruby.so.1.8.1)
==2592==    by 0x4026A7D9: rb_call (in /usr/lib/libruby.so.1.8.1)
==2592==    Address 0x41587C98 is not stack'd, malloc'd or free'd

valgrind: vg_malloc2.c:466 (bszW_to_pszW): Assertion `pszW >= 0' failed.

sched status:

Thread 1: status = Runnable, associated_mx = 0x0, associated_cv = 0x0
==2592==    at 0x40027BCE: malloc (vg_replace_malloc.c:153)
==2592==    by 0x4027C144: ruby_xmalloc (in /usr/lib/libruby.so.1.8.1)
==2592==    by 0x402D4C58: ruby_strdup (in /usr/lib/libruby.so.1.8.1)
==2592==    by 0x402A5B06: rb_intern (in /usr/lib/libruby.so.1.8.1)

なお、SEGV になる方での出力はもっと長くなりますが、そちらもお送りするほ
うがよろしいでしょうか？

よろしくお願いします。
-- 
かずひこ <http://wiki.fdiary.net/kazuhiko/>
  ★シャア「名字が付いてない」
  ☆一兵卒「あんなの飾りです。偉い人にはそれが分からんのです」