Почему Ruby вызывает ошибку сегментации только в моей системе и только в этом приложении Rails?
Я не совсем уверен, как правильно отладить это, но попробовал несколько разных подходов, которые жевали время, но не решили проблему. По крайней мере 4 других человека в моем офисе могут выполнить этот код на идентичных машинах с той же версией ruby и rubygems, установленных без ошибок.
Вот код, который я выполняю:
status = Open4::popen4( "swfmill simple stdin stdout" ) do | pid, stdin, stdout, stderr |
stdin.write( config )
stdin.close
bytes = stdout.read
errors = stderr.read
end
Я получаю «ошибку шины» в этой строке:
errors = stderr.read
Если я прокомментирую эту строку, я получу «Ошибка сегментации» в этой строке:
bytes = stdout.read
Я, очевидно, использую библиотеку Open4 и выполняю внешний процесс. Этот внешний процесс прекрасно работает, когда выполняется непосредственно из терминала, а также когда этот код Ruby выполняется вне этого конкретного приложения Rails, даже в другом, более простом приложении Rails.
Чтобы воспроизвести ошибку, мне нужно только выполнить мой конкретный метод тестирования, например:
ruby test/unit/swf_generator_test.rb --name test_get_bytes
Я использую Snow Leopard Mac OS X 10.6.2 (10C540) на MacBook Pro с процессором Intel Core 2 Duo 2,53 ГГц и 8 ГБ оперативной памяти.
ruby -v && gem -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0]
1.3.5
Я выполнил этот код внутри GDB и обнаружил, что мои библиотеки libxml и libxslt были неправильно установлены. Мне удалось установить обе эти библиотеки, и теперь GDB больше не сообщает мне ничего полезного. Вот текущий вывод из GDB:
gdb ruby
GNU gdb 6.3.50-20050815 (Apple version gdb-1344) (Fri Jul 3 01:19:56 UTC 2009)
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 "x86_64-apple-darwin"...Reading symbols for shared libraries .... done
(gdb) run test/unit/swf_generator_test.rb --name test_get_bytes
Starting program: /usr/local/bin/ruby test/unit/swf_generator_test.rb --name test_get_bytes
Reading symbols for shared libraries +++... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries .. done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries ... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries .. done
Reading symbols for shared libraries . done
Reading symbols for shared libraries .. done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries .... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries ... done
Loaded suite test/unit/swf_generator_test
Started
Reading symbols for shared libraries .. done
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00007fff81973e90
0x0000000100045bf1 in gc_mark ()
(gdb)
Я также перестроил / переустановил все мои гемы после обновления библиотек libxml и libxslt. Я сделал это, запустив:
sudo gem pristine --all
И, наконец, вот моя запись в журнале консоли для этого конкретного исключения:
Process: ruby [5059]
Path: /usr/local/bin/ruby
Identifier: ruby
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: bash [5050]
Date/Time: 2010-01-21 11:31:45.468 -0800
OS Version: Mac OS X 10.6.2 (10C540)
Report Version: 6
Exception Type: EXC_BAD_ACCESS (SIGABRT)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000000e
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 0x00007fff819befe6 __kill + 10
1 libSystem.B.dylib 0x00007fff81a5fe32 abort + 83
2 libruby.dylib 0x000000010001b887 rb_check_type + 0
3 libruby.dylib 0x00000001000a5427 sigsegv + 84
4 libSystem.B.dylib 0x00007fff819d0eaa _sigtramp + 26
5 ??? 0x00007fff5fbd7410 0 + 140734799639568
6 libruby.dylib 0x0000000100045a50 mark_tbl + 44
7 libruby.dylib 0x0000000100045a71 rb_mark_tbl + 31
8 libruby.dylib 0x0000000100059286 mark_load_arg + 40
9 libruby.dylib 0x000000010004635f gc_mark_children + 1687
10 libruby.dylib 0x0000000100045c74 gc_mark + 221
11 libruby.dylib 0x0000000100045882 mark_locations_array + 61
12 libruby.dylib 0x00000001000459fc rb_gc_mark_locations + 59
13 libruby.dylib 0x0000000100047620 garbage_collect + 389
14 libruby.dylib 0x0000000100044c2d ruby_xmalloc + 107
15 libruby.dylib 0x0000000100033a76 scope_dup + 100
16 libruby.dylib 0x000000010002ab7d rb_yield_0 + 2646
17 libruby.dylib 0x0000000100034dbd proc_invoke + 1020
18 libruby.dylib 0x0000000100034f73 rb_proc_call + 39
19 libruby.dylib 0x000000010002e061 call_cfunc + 252
20 libruby.dylib 0x000000010002d16a rb_call0 + 1548
21 libruby.dylib 0x000000010002ebca rb_call + 711
22 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
23 libruby.dylib 0x00000001000251d0 rb_eval + 6859
24 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
25 libruby.dylib 0x000000010002ebca rb_call + 711
26 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
27 libruby.dylib 0x00000001000249fc rb_eval + 4855
28 libruby.dylib 0x000000010002716e rb_eval + 14953
29 libruby.dylib 0x000000010002a8f8 rb_yield_0 + 2001
30 libruby.dylib 0x0000000100034dbd proc_invoke + 1020
31 libruby.dylib 0x0000000100034f73 rb_proc_call + 39
32 libruby.dylib 0x000000010002e061 call_cfunc + 252
33 libruby.dylib 0x000000010002d16a rb_call0 + 1548
34 libruby.dylib 0x000000010002ebca rb_call + 711
35 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
36 libruby.dylib 0x00000001000251d0 rb_eval + 6859
37 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
38 libruby.dylib 0x000000010002ebca rb_call + 711
39 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
40 libruby.dylib 0x00000001000249fc rb_eval + 4855
41 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
42 libruby.dylib 0x000000010002ebca rb_call + 711
43 libruby.dylib 0x00000001000260fb rb_eval + 10742
44 libruby.dylib 0x0000000100025617 rb_eval + 7954
45 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
46 libruby.dylib 0x000000010002ebca rb_call + 711
47 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
48 libruby.dylib 0x00000001000270e5 rb_eval + 14816
49 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
50 libruby.dylib 0x000000010002ebca rb_call + 711
51 libruby.dylib 0x000000010002ed88 rb_f_send + 170
52 libruby.dylib 0x000000010002e080 call_cfunc + 283
53 libruby.dylib 0x000000010002d16a rb_call0 + 1548
54 libruby.dylib 0x000000010002ebca rb_call + 711
55 libruby.dylib 0x00000001000260fb rb_eval + 10742
56 libruby.dylib 0x0000000100024f5a rb_eval + 6229
57 libruby.dylib 0x00000001000251d0 rb_eval + 6859
58 libruby.dylib 0x00000001000251d0 rb_eval + 6859
59 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
60 libruby.dylib 0x000000010002ebca rb_call + 711
61 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
62 libruby.dylib 0x0000000100035764 block_pass + 460
63 libruby.dylib 0x000000010002473a rb_eval + 4149
64 libruby.dylib 0x000000010002a8f8 rb_yield_0 + 2001
65 libruby.dylib 0x000000010002ad2f rb_yield + 42
66 libruby.dylib 0x00000001000061e4 rb_ary_each + 100
67 libruby.dylib 0x000000010002e098 call_cfunc + 307
68 libruby.dylib 0x000000010002d16a rb_call0 + 1548
69 libruby.dylib 0x000000010002ebca rb_call + 711
70 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
71 libruby.dylib 0x00000001000249fc rb_eval + 4855
72 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
73 libruby.dylib 0x000000010002ebca rb_call + 711
74 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
75 libruby.dylib 0x0000000100035764 block_pass + 460
76 libruby.dylib 0x000000010002473a rb_eval + 4149
77 libruby.dylib 0x000000010002a8f8 rb_yield_0 + 2001
78 libruby.dylib 0x000000010002ad2f rb_yield + 42
79 libruby.dylib 0x00000001000061e4 rb_ary_each + 100
80 libruby.dylib 0x000000010002e098 call_cfunc + 307
81 libruby.dylib 0x000000010002d16a rb_call0 + 1548
82 libruby.dylib 0x000000010002ebca rb_call + 711
83 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
84 libruby.dylib 0x00000001000249fc rb_eval + 4855
85 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
86 libruby.dylib 0x000000010002ebca rb_call + 711
87 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
88 libruby.dylib 0x00000001000249fc rb_eval + 4855
89 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
90 libruby.dylib 0x000000010002ebca rb_call + 711
91 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
92 libruby.dylib 0x0000000100025617 rb_eval + 7954
93 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
94 libruby.dylib 0x000000010002ebca rb_call + 711
95 libruby.dylib 0x000000010002614c rb_eval + 10823
96 libruby.dylib 0x0000000100025617 rb_eval + 7954
97 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
98 libruby.dylib 0x000000010002ebca rb_call + 711
99 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
100 libruby.dylib 0x0000000100025617 rb_eval + 7954
101 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
102 libruby.dylib 0x000000010002ebca rb_call + 711
103 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
104 libruby.dylib 0x0000000100025b16 rb_eval + 9233
105 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
106 libruby.dylib 0x000000010002ebca rb_call + 711
107 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
108 libruby.dylib 0x000000010002dc1b rb_call0 + 4285
109 libruby.dylib 0x000000010002ebca rb_call + 711
110 libruby.dylib 0x0000000100025dc4 rb_eval + 9919
111 libruby.dylib 0x0000000100025f54 rb_eval + 10319
112 libruby.dylib 0x000000010002a8f8 rb_yield_0 + 2001
113 libruby.dylib 0x0000000100034dbd proc_invoke + 1020
114 libruby.dylib 0x0000000100032ba5 call_end_proc + 230
115 libruby.dylib 0x0000000100032eea rb_exec_end_proc + 559
116 libruby.dylib 0x000000010002051c ruby_finalize_0 + 170
117 libruby.dylib 0x00000001000205ab ruby_cleanup + 57
118 libruby.dylib 0x00000001000208c8 ruby_stop + 19
119 libruby.dylib 0x0000000100020937 compile_error + 0
120 ruby 0x0000000100000ebe dyld_stub_exit + 0
121 ruby 0x0000000100000e74 start + 52
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x00007fff5fbd7318 rcx: 0x00007fff5fbd6a68 rdx: 0x0000000000000000
rdi: 0x00000000000013c3 rsi: 0x0000000000000006 rbp: 0x00007fff5fbd6a80 rsp: 0x00007fff5fbd6a68
r8: 0x0000000000000002 r9: 0x0000000000000000 r10: 0x00007fff819bb026 r11: 0x0000000000000202
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x0000000000000000 r15: 0x0000000000000000
rip: 0x00007fff819befe6 rfl: 0x0000000000000202 cr2: 0x00007fff702e71f0
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