[ruby-dev:4481] bug? thread

渡辺哲也です。

thread を使用したときに core をはいてしまうようです。

タイミングに関係するようで、実行すれば毎回起きるとい
うものではありません。「何度か実行して起きる」という
感じです。動作環境により再現しない場合は、関数 ggg 
内の、upto(200) の数字を少し大きく変更してみてくださ
い。

■ 環境

Ruby

ruby-1.3.1-990127

Linux

TurboLinux 3.0J
libc glibc-2.0.7
gcc egcs-1.1b

HP-UX

HP-UX 10.20
gcc gcc-2.7.2.1

■ 再現スクリプト

------------------------------
require 'thread'

def ggg
  1.upto(10) do |j|
    jj = []
    1.upto(200) do |i|
      jj[i] = ' ' * i
    end
  end
end

t = []
max = 8

1.upto(max) do |i|
  w = Thread.start {
    ggg
    p i
  }
  t.push(w)
end

1.upto(max) do |i|
  w = t.pop
  if w and w.alive?
    w.join
  end
end

exit
------------------------------

■ バックトレース

Linux:

#0  0x400780a1 in ?? () from /lib/libc.so.6
#1  0x400790a1 in ?? () from /lib/libc.so.6
#2  0x8097cad in rb_bug () at error.c:154
#3  0x8083b8d in sigsegv () at signal.c:333
#4  0xbfffd3d0 in ?? ()
#5  0x805ad65 in thread_mark (th=0x80fcf28) at eval.c:5847
#6  0x8060251 in rb_gc_mark (ptr=0x4010b568) at gc.c:574
#7  0x805aeae in rb_gc_mark_threads () at eval.c:5890
#8  0x80607d7 in rb_gc () at gc.c:916
#9  0x805faa8 in xmalloc (size=8480) at gc.c:65
#10 0x805fb25 in xrealloc (ptr=0x0, size=8480) at gc.c:100
#11 0x805b025 in rb_thread_save_context (th=0x80fcf28) at eval.c:5926
#12 0x805c4e2 in rb_thread_create_0 (fn=0x805c690 <rb_thread_yield>, arg=0x0, klass=1074978560) at eval.c:6729
#13 0x805c6f0 in rb_thread_start (klass=1074978560) at eval.c:6792
#14 0x8056643 in call_cfunc (func=0x805c6c0 <rb_thread_start>, recv=1074978560, len=0, argc=0, argv=0x0) at eval.c:3612
#15 0x8056b6f in rb_call0 (klass=1074978540, recv=1074978560, id=5417, argc=0, argv=0x0, body=0x4012deb0, nosuper=1)
    at eval.c:3748
#16 0x8057179 in rb_call (klass=1074978540, recv=1074978560, mid=5417, argc=0, argv=0x0, scope=0) at eval.c:3933
#17 0x805312c in rb_eval (self=1074995020, node=0x40125b20) at eval.c:2160
#18 0x80522b8 in rb_eval (self=1074995020, node=0x40125a30) at eval.c:1901
#19 0x8053b20 in rb_eval (self=1074995020, node=0x40125b48) at eval.c:2303
#20 0x8051b70 in rb_eval (self=1074995020, node=0x40125990) at eval.c:1695
#21 0x8055804 in rb_yield_0 (val=11, self=1074995020, klass=0) at eval.c:3159
#22 0x8055950 in rb_yield (val=11) at eval.c:3200
#23 0x806bdec in fix_upto (from=3, to=17) at numeric.c:1296
#24 0x805664e in call_cfunc (func=0x806bdb0 <fix_upto>, recv=3, len=1, argc=1, argv=0xbfffeaf4) at eval.c:3615
#25 0x8056b6f in rb_call0 (klass=1074976360, recv=3, id=3857, argc=1, argv=0xbfffeaf4, body=0x4012d12c, nosuper=1)
    at eval.c:3748
#26 0x8057179 in rb_call (klass=1074976360, recv=3, mid=3857, argc=1, argv=0xbfffeaf4, scope=0) at eval.c:3933
#27 0x805312c in rb_eval (self=1074995020, node=0x40125bac) at eval.c:2160
#28 0x80522b8 in rb_eval (self=1074995020, node=0x40125954) at eval.c:1901
#29 0x8051b70 in rb_eval (self=1074995020, node=0x4012592c) at eval.c:1695
#30 0x805067e in eval_node (self=1074995020) at eval.c:961
#31 0x8050738 in ruby_run () at eval.c:990
#32 0x804f5bc in main (argc=2, argv=0xbffff890, envp=0xbffff89c) at main.c:39

HP-UX:

#0  0xc0133598 in kill ()
#1  0xc00a49e4 in _raise ()
#2  0xc0085f10 in abort ()
#3  0x35794 in rb_bug (fmt=0x0) at error.c:154
#4  0x5b720 in sigsegv (sig=11) at signal.c:333
#5  <signal handler called>
#6  rb_gc_mark (ptr=0x20202020) at gc.c:394
#7  0x2d290 in thread_mark (th=0x400e52f8) at eval.c:5847
#8  0x3b564 in rb_gc_mark (ptr=0x20202020) at gc.c:574
#9  0x2d3b8 in rb_gc_mark_threads () at eval.c:5890
#10 0x3c0c0 in rb_gc () at gc.c:916
#11 0x3a450 in xmalloc (size=11712) at gc.c:65
#12 0x3a55c in xrealloc (ptr=0x0, size=11712) at gc.c:108
#13 0x2d538 in rb_thread_save_context (th=0x400e52f8) at eval.c:5926
#14 0x2ecd0 in rb_thread_create_0 (fn=0x400023b2 <_exit_dummy_decl+1994>, arg=0x0, klass=1074401280) at eval.c:6729
#15 0x2ef20 in rb_thread_start (klass=1074040208) at eval.c:6792
#16 0x27c88 in call_cfunc (func=0x400023ba <_exit_dummy_decl+2002>, recv=1074040208, len=162, argc=0, argv=0x0) at eval.c:3612
#17 0x28438 in rb_call0 (klass=1074040184, recv=1074040208, id=5233, argc=0, argv=0x0, body=0x40048d30, nosuper=1) at eval.c:3748
#18 0x28bcc in rb_call (klass=1074040184, recv=1074040208, mid=5233, argc=0, argv=0x0, scope=0) at eval.c:3933
#19 0x23f5c in rb_eval (self=1074058304, node=0x4003ef50) at eval.c:2160
#20 0x2318c in rb_eval (self=1074058304, node=0x4003ee30) at eval.c:1901
#21 0x24924 in rb_eval (self=1074058304, node=0x4003ef80) at eval.c:2303
#22 0x22a4c in rb_eval (self=1074058304, node=0x4003ed70) at eval.c:1695
#23 0x26964 in rb_yield_0 (val=17, self=1074058304, klass=1074401280) at eval.c:3159
#24 0x26b28 in rb_yield (val=538976288) at eval.c:3200
#25 0x488d4 in fix_upto (from=3, to=1) at numeric.c:1296
#26 0x27ca0 in call_cfunc (func=0x40003002 <_exit_dummy_decl+5146>, recv=8, len=162, argc=0, argv=0x7b03b9c0) at eval.c:3615
#27 0x28438 in rb_call0 (klass=1074037568, recv=3, id=3857, argc=1, argv=0x7b03b9c0, body=0x40047cf8, nosuper=1) at eval.c:3748
#28 0x28bcc in rb_call (klass=1074037568, recv=3, mid=3857, argc=1, argv=0x7b03b9c0, scope=0) at eval.c:3933
#29 0x23f5c in rb_eval (self=1074058304, node=0x40011378) at eval.c:2160
#30 0x23f5c in rb_eval (self=1074058304, node=0x4003ed28) at eval.c:2160
#31 0x22a4c in rb_eval (self=1074058304, node=0x4003ecf8) at eval.c:1695
#32 0x20e54 in eval_node (self=1074058304) at eval.c:962
#33 0x20f0c in ruby_run () at eval.c:990
#34 0x1e714 in main (argc=2, argv=0x7b03a70c, envp=0x400a1000) at main.c:39

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