[ruby-dev:43738] [Ruby 1.9 - Bug #4870][Open] forkのテストが非常にまれに失敗する

Issue #4870 has been reported by Motohiro KOSAKI.

----------------------------------------
Bug #4870: forkのテストが非常にまれに失敗する
http://redmine.ruby-lang.org/issues/4870

Author: Motohiro KOSAKI
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 1.9.3
ruby -v: ruby 1.9.3dev (2011-06-11 trunk 31991) [x86_64-darwin10.7.4] 


MacOS Xでmake check すると一度だけ以下のテストが fail しました。

--------------------------------------------------------------------------------------------------------------------
#236 test_fork.rb:30:in `<top (required)>': 
     begin
       if pid1 = fork
         sleep 1
         Process.kill("USR1", pid1)
         _, s = Process.wait2(pid1)
         s.success? ? :ok : :ng
       else
         if pid2 = fork
           trap("USR1") { Time.now.to_s }
           Process.wait2(pid2)
         else
           sleep 2
         end
         exit 0
       end
     rescue NotImplementedError
       :ok
     end
  #=> "main_thread: run, sig: 30\nsignal-hand: sig: 30\nok" (expected "ok")  [ruby-core:28924]
FAIL 1/934 tests failed
make: *** [yes-btest-ruby] Error 1
[1]    22511 exit 2     make check OPTS="-v" TESTS="-v -q -j8 "
~/ruby% make test-all OPTS="-v" TESTS="-v -q -j8 "
./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  -- "./test/runner.rb" --ruby="./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  --" -v -q -j8 
Run options: "--ruby=./miniruby -I./lib -I. -I.ext/common  ./tool/runruby.rb --extout=.ext  --" -v -q -j8
--------------------------------------------------------------------------------------------------------------------


採取されたバックトレースは以下

--------------------------------------------------------------------------------------------------------------------
Process:         ruby-193 [28604]
Path:            /Users/kosaki/ruby/ruby-193
Identifier:      ruby-193
Version:         ??? (???)
Code Type:       X86-64 (Native)
Parent Process:  ruby-193 [26880]

Date/Time:       2011-06-11 15:03:23.827 +0900
OS Version:      Mac OS X 10.6.7 (10J4138)
Report Version:  6

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Application Specific Information:
abort() called

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   libSystem.B.dylib             	0x00007fff885225d6 __kill + 10
1   libSystem.B.dylib             	0x00007fff885c2cde abort + 83
2   ruby-193                      	0x0000000100037e92 rb_bug_errno + 0
3   ruby-193                      	0x00000001000fc3ca signal_exec + 0
4   libSystem.B.dylib             	0x00007fff8853466a _sigtramp + 26
5   libSystem.B.dylib             	0x00007fff885225d6 __kill + 10
6   ruby-193                      	0x00000001000fbfcb rb_f_kill + 673
7   ruby-193                      	0x0000000100175428 call_cfunc + 282
8   ruby-193                      	0x000000010017528f vm_call_cfunc + 284
9   ruby-193                      	0x0000000100174458 vm_call_method + 373
10  ruby-193                      	0x000000010016efba vm_exec_core + 11449
11  ruby-193                      	0x000000010017ed92 vm_exec + 147
12  ruby-193                      	0x000000010017f765 rb_iseq_eval_main + 45
13  ruby-193                      	0x000000010003ccfb ruby_exec_internal + 193
14  ruby-193                      	0x000000010003ce1f ruby_exec_node + 30
15  ruby-193                      	0x000000010003cdf2 ruby_run_node + 56
16  ruby-193                      	0x0000000100000953 main + 79 (main.c:40)
17  ruby-193                      	0x00000001000008fc start + 52

Thread 1:
0   libSystem.B.dylib             	0x00007fff8850ef8a __semwait_signal + 10
1   libSystem.B.dylib             	0x00007fff88512da1 _pthread_cond_wait + 1286
2   ruby-193                      	0x0000000100182a82 native_cond_timedwait + 37
3   ruby-193                      	0x0000000100183431 thread_timer + 121
4   libSystem.B.dylib             	0x00007fff8850d4f6 _pthread_start + 331
5   libSystem.B.dylib             	0x00007fff8850d3a9 thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000000000000001  rcx: 0x000000010035c948  rdx: 0x0000000000000000
  rdi: 0x0000000000006fbc  rsi: 0x0000000000000006  rbp: 0x000000010035c960  rsp: 0x000000010035c948
   r8: 0x00007fff70f2da40   r9: 0x0000000000000000  r10: 0x00007fff8851e616  r11: 0xffffff80002e4730
  r12: 0x0000000000000000  r13: 0x0000000000000000  r14: 0x0000000100493b48  r15: 0x00000001005ffef8
  rip: 0x00007fff885225d6  rfl: 0x0000000000000202  cr2: 0x000000010035afd8

Binary Images:
       0x100000000 -        0x100225fe7 +ruby-193 ??? (???) <6031750C-E9DF-0F02-C572-144BCA6227E2> /Users/kosaki/ruby/ruby-193
       0x100362000 -        0x100363fff +encdb.bundle ??? (???) <44DF3334-78BC-7676-3094-9C703E5554A8> /Users/kosaki/ruby/.ext/x86_64-darwin10.7.4/enc/encdb.bundle
       0x100366000 -        0x100367fff +transdb.bundle ??? (???) <0DB59CC1-CB0E-B01C-A798-D8B6D67D2D19> /Users/kosaki/ruby/.ext/x86_64-darwin10.7.4/enc/trans/transdb.bundle
    0x7fff5fc00000 -     0x7fff5fc3bdef  dyld 132.1 (???) <DB8B8AB0-0C97-B51C-BE8B-B79895735A33> /usr/lib/dyld
    0x7fff805a7000 -     0x7fff8065dfff  libobjc.A.dylib 227.0.0 (compatibility 1.0.0) <1960E662-D35C-5D98-EB16-D43166AE6A22> /usr/lib/libobjc.A.dylib
    0x7fff862ec000 -     0x7fff862f0ff7  libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <95718673-FEEE-B6ED-B127-BCDBDB60D4E5> /usr/lib/system/libmathCommon.A.dylib
    0x7fff86677000 -     0x7fff866f4fef  libstdc++.6.dylib 7.9.0 (compatibility 7.0.0) <35ECA411-2C08-FD7D-11B1-1B7A04921A5C> /usr/lib/libstdc++.6.dylib
    0x7fff884d3000 -     0x7fff88694fff  libSystem.B.dylib 125.2.10 (compatibility 1.0.0) <C80582B8-D8F7-A378-E27D-28411EE53901> /usr/lib/libSystem.B.dylib
    0x7fff88789000 -     0x7fff887d5fff  libauto.dylib ??? (???) <328CCF97-091D-C529-E576-C78583445711> /usr/lib/libauto.dylib
    0x7fffffe00000 -     0x7fffffe01fff  libSystem.B.dylib ??? (???) <C80582B8-D8F7-A378-E27D-28411EE53901> /usr/lib/libSystem.B.dylib




-- 
http://redmine.ruby-lang.org