From: Tanaka Akira <akr@...17n.org>
Date: 2003-10-09T21:55:07+09:00
Subject: [ruby-dev:21586] Re: core dump in rb_thread_schedule

In article <200310091242.h99CgWfA007895@sharui.nakada.kanuma.tochigi.jp>,
  nobu.nakada@nifty.ne.jp writes:

> main_threadとcurr_threadからnextをたどって見せてもらえますか。

#0  0x08062d9b in rb_thread_schedule () at eval.c:8589
8589            if (!found && th->status <= THREAD_RUNNABLE) {
(gdb) p main_thread
$1 = 0x80fe380
(gdb) p main_thread->next
$2 = (struct thread *) 0x9110040
(gdb) p curr_thread
$3 = 0x9113a58
(gdb) p curr_thread->next
$4 = (struct thread *) 0x895a638
(gdb) main_thread->next->next
Undefined command: "main".  Try "help".
(gdb) p main_thread->next->next
$5 = (struct thread *) 0x90ffb78
(gdb) p main_thread->next->next->next
$6 = (struct thread *) 0x90ba010
(gdb) p main_thread->next->next->next->next
$7 = (struct thread *) 0x8a9e0b0
(gdb) p main_thread->next->next->next->next->next
$8 = (struct thread *) 0x90d7d98
(gdb) p main_thread->next->next->next->next->next->next
$9 = (struct thread *) 0x9130348
(gdb) p main_thread->next->next->next->next->next->next->next
$10 = (struct thread *) 0x90f5390
(gdb) p main_thread->next->next->next->next->next->next->next->next
$11 = (struct thread *) 0x8fb1040
(gdb) p main_thread->next->next->next->next->next->next->next->next->next
$12 = (struct thread *) 0x8887568
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next
$13 = (struct thread *) 0x894c588
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next
$14 = (struct thread *) 0x904e688
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next
$15 = (struct thread *) 0x88a0990
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next
$16 = (struct thread *) 0x913da20
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$17 = (struct thread *) 0x8841740
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$18 = (struct thread *) 0x9056450
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$19 = (struct thread *) 0x8703148
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$20 = (struct thread *) 0x90e5c28
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$21 = (struct thread *) 0x86b9468
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$22 = (struct thread *) 0x8fa3ed8
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$23 = (struct thread *) 0x8957750
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$24 = (struct thread *) 0x84e1630
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$25 = (struct thread *) 0x80fe380
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$26 = (struct thread *) 0x9110040
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$27 = (struct thread *) 0x90ffb78
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next->next
$28 = (struct thread *) 0x90ba010
(gdb) p curr_thread->next->next
$29 = (struct thread *) 0x746867
(gdb) p curr_thread->next->next->next
Cannot access memory at address 0x746867
(gdb) p found
$30 = 0
(gdb) p th
$31 = 0x746867
(gdb) 

また、21:15 にもまた落ちました。

#0  0x08062d9b in rb_thread_schedule () at eval.c:8589
8589            if (!found && th->status <= THREAD_RUNNABLE) {
(gdb) p found
$1 = 0
(gdb) p th
$2 = 0x3932
(gdb) p curr_thread
$3 = 0x9354a58
(gdb) p curr_thread->next
$4 = (struct thread *) 0x8824e60
(gdb) p curr_thread->next->next
$5 = (struct thread *) 0x3932
(gdb) p curr_thread->next->next->next
Cannot access memory at address 0x3932
(gdb) p main_thread->next
$6 = (struct thread *) 0x9352b58
(gdb) p main_thread->next->next
$7 = (struct thread *) 0x938faa8
(gdb) p main_thread->next->next->next
$8 = (struct thread *) 0x8a3c748
(gdb) p main_thread->next->next->next->next
$9 = (struct thread *) 0x8634d48
(gdb) p main_thread->next->next->next->next->next
$10 = (struct thread *) 0x8a20820
(gdb) p main_thread->next->next->next->next->next->next
$11 = (struct thread *) 0x854f0f0
(gdb) p main_thread->next->next->next->next->next->next->next
$12 = (struct thread *) 0x9346c30
(gdb) p main_thread->next->next->next->next->next->next->next->next
$13 = (struct thread *) 0x8995190
(gdb) p main_thread->next->next->next->next->next->next->next->next->next
$14 = (struct thread *) 0x84ddd80
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next
$15 = (struct thread *) 0x80fe380
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next
$16 = (struct thread *) 0x9352b58
(gdb) p main_thread->next->next->next->next->next->next->next->next->next->next->next->next
$17 = (struct thread *) 0x938faa8

> 1.552, 1.554, 1.557をback outするパッチです。これで変化はあるで
> しょうか。

試してみます。
-- 
[田中 哲][たなか あきら][Tanaka Akira]