在 Ruby 解释器段错误之后，是否可以从 corefile 中获取 Ruby 回溯? [英] After the Ruby interpreter segfaults, is it possible to get the Ruby backtrace from the corefile?
本文介绍了在 Ruby 解释器段错误之后，是否可以从 corefile 中获取 Ruby 回溯?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
注意:我正在使用我在使用 libxml-ruby gem 时遇到的段错误来说明问题，但我已经用所述 gem 解决了我的问题.这个问题的真正含义是从 gdb 中查看 Ruby 回溯(即解释器在 Ruby 代码无法处理异常时打印的相同内容)，其中包含解释器本身遇到分段错误的核心文件.
Note: I'm using a segfault that I encountered whilst using the libxml-ruby gem to illustrate the question, but I've since fixed my problem with said gem. What this question is really about is viewing the Ruby backtrace (i.e. the same thing the interpreter prints when Ruby code fails to handle an exception) from gdb with a corefile the interpreter itself encounters a segmentation fault.
我在生成 XML 文档时遇到了一个奇怪的段错误:
I'm getting an odd segfault while generating an XML document, of all things:
/railsroot/vendor/isolated/ruby-1.8/gems/libxml-ruby-1.1.2/lib/libxml/node.rb:123: [BUG] Segmentation fault
ruby 1.8.7 (2011-02-18 patchlevel 334) [x86_64-linux], MBARI 0x6770, Ruby Enterprise Edition 2011.03
Aborted
更新 1:这在 vanilla Ruby (MRI) 下也会出现段错误.
Update 1: This segfaults under vanilla Ruby (MRI) as well.
我打开了 corefiles 并查看了 gdb 中的回溯(见问题的结尾).我可以看到解释器在哪里崩溃，谷歌搜索会导致 很多有希望的结果.除了解释器回溯之外，我希望看到的是 Ruby 代码本身的回溯(即从解释器的角度来看的回溯).
I've turned on corefiles and taken a look at the backtrace in gdb (see the end of the question). I can see where the interpreter crashing, and Googling for this leads to lots of promising results. What I'd like to see, in addition to the interpreter backtrace, is the backtrace in the Ruby code itself (i.e. the backtrace from the interpreter's point of view).
我希望在 gdb 中加载核心将允许我调用一些解释器函数来打印出解释代码的堆栈.
I'm hoping that loading the core in gdb will allow me to call some interpreter function that prints out the stack of the interpreted code.
有什么想法吗?
这里是核心和回溯，对于好奇的人:
Here's the core and backtrace, for the curious:
: foo@bar; ulimit -c unlimited
: foo@bar; RAILS_ENV=production ./script/runner script/feeds/batchfeed.rb --config config/feeds/$feed.yml --timer /tmp/$feed.timer --gzip --output /tmp/$feed.xml.gz
/railsroot/vendor/isolated/ruby-1.8/gems/libxml-ruby-1.1.2/lib/libxml/node.rb:123: [BUG] Segmentation fault
ruby 1.8.7 (2011-02-18 patchlevel 334) [x86_64-linux], MBARI 0x6770, Ruby Enterprise Edition 2011.03
Aborted
: foo@bar; ls -l core
-rw------- 1 rails rails 145301504 2011-03-04 08:34 core
: foo@bar; gdb `which ruby` core
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) bt
#0 0x00007f041c095a75 in raise () from /lib/libc.so.6
#1 0x00007f041c0995c0 in abort () from /lib/libc.so.6
#2 0x00000000004a3d59 in rb_bug (fmt=0x4bfc60 "Segmentation fault") at error.c:213
#3 0x0000000000477e75 in sigsegv (sig=) at signal.c:633
#4
#5 0x000000000047ae79 in st_lookup (table=0x7f041867eda0, key=3031, value=0x7fff813ee288) at st.c:250
#6 0x0000000000413ddf in search_method (klass=132608000, id=3031, origin=0x7fff813ee2c8) at eval.c:510
#7 0x0000000000413e67 in rb_get_method_body (klassp=0x7fff813ee318, idp=0x7fff813ee320, noexp=0x7fff813ee32c) at eval.c:531
#8 0x000000000041c66b in rb_call (klass=132608000, recv=132608200, mid=3031, argc=0, argv=0x0, scope=0, self=132610480) at eval.c:6282
#9 0x0000000000427a38 in eval_call (self=132610480, node=0x1df0308) at eval.c:3381
#10 0x000000000041964c in rb_eval (self=132610480, node=0x1df02e0) at eval.c:4015
#11 0x000000000041c42b in rb_call0 (klass=37665480, recv=132610480, id=104367, oid=, argc=0, argv=0x0, body=0x1d42f28, flags=0)
at eval.c:6211
#12 0x000000000041c733 in rb_call (klass=37665480, recv=132610480, mid=104367, argc=0, argv=0x0, scope=0, self=74960600) at eval.c:6308
#13 0x0000000000427a38 in eval_call (self=74960600, node=0x488f000) at eval.c:3381
#14 0x0000000000419bc4 in rb_eval (self=74960600, node=0x488efd8) at eval.c:3910
#15 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=75649, oid=, argc=0, argv=0x7fff813eead0, body=0x481e5d0,
flags=-2126583088) at eval.c:6211
#16 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=75649, argc=2, argv=0x7fff813eeac0, scope=1, self=74960600) at eval.c:6308
#17 0x0000000000427ccf in eval_fcall (self=74960600, node=0x48915d0) at eval.c:3396
#18 0x0000000000426cdb in eval_iter (self=74960600, node=0x4890fb8) at eval.c:3200
#19 0x00000000004279ef in eval_call (self=74960600, node=0x4890f68) at eval.c:3376
#20 0x000000000041aacb in rb_yield_0 (val=132724680, self=74960600, klass=, flags=, avalue=0) at eval.c:5239
#21 0x000000000048fd01 in rb_ary_each (ary=132624640) at array.c:1261
#22 0x000000000041c555 in rb_call0 (klass=21994320, recv=132624640, id=4001, oid=, argc=,
argv=, body=0x14f9308, flags=0) at eval.c:6058
#23 0x000000000041c733 in rb_call (klass=21994320, recv=132624640, mid=4001, argc=0, argv=0x0, scope=0, self=74960600) at eval.c:6308
#24 0x0000000000427a38 in eval_call (self=74960600, node=0x48921b0) at eval.c:3381
#25 0x0000000000426cdb in eval_iter (self=74960600, node=0x4890ef0) at eval.c:3200
#26 0x000000000041aacb in rb_yield_0 (val=132612040, self=74960600, klass=, flags=, avalue=0) at eval.c:5239
#27 0x000000000041958c in rb_eval (self=74960600, node=0x488f0f0) at eval.c:3858
#28 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=75649, oid=, argc=0, argv=0x7fff813efb48, body=0x481e5d0,
flags=-2126578872) at eval.c:6211
#29 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=75649, argc=1, argv=0x7fff813efb40, scope=1, self=74960600) at eval.c:6308
#30 0x0000000000427ccf in eval_fcall (self=74960600, node=0x4893830) at eval.c:3396
#31 0x0000000000426cdb in eval_iter (self=74960600, node=0x4890e78) at eval.c:3200
#32 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=149753, oid=, argc=0, argv=0x7fff813f0138, body=0x481e710,
flags=-2126577352) at eval.c:6211
#33 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=149753, argc=3, argv=0x7fff813f0120, scope=1, self=74960600) at eval.c:6308
#34 0x0000000000427ccf in eval_fcall (self=74960600, node=0x4893cb8) at eval.c:3396
#35 0x00000000004279ef in eval_call (self=74960600, node=0x4893c68) at eval.c:3376
#36 0x000000000041aacb in rb_yield_0 (val=132614040, self=74960600, klass=, flags=, avalue=0) at eval.c:5239
#37 0x000000000041958c in rb_eval (self=74960600, node=0x488f0f0) at eval.c:3858
#38 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=75649, oid=, argc=0, argv=0x7fff813f07e0, body=0x481e5d0,
flags=-2126575648) at eval.c:6211
#39 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=75649, argc=2, argv=0x7fff813f07d0, scope=1, self=74960600) at eval.c:6308
#40 0x0000000000427ccf in eval_fcall (self=74960600, node=0x488e7b8) at eval.c:3396
#41 0x000000000042687c in block_pass (self=, node=) at eval.c:9336
#42 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=95641, oid=, argc=0, argv=0x7fff813f0dc8, body=0x481e580,
flags=-2126574136) at eval.c:6211
#43 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=95641, argc=1, argv=0x7fff813f0dc0, scope=1, self=74960600) at eval.c:6308
#44 0x0000000000427ccf in eval_fcall (self=74960600, node=0x4895360) at eval.c:3396
#45 0x0000000000426cdb in eval_iter (self=74960600, node=0x4893bc8) at eval.c:3200
#46 0x00000000004279ef in eval_call (self=74960600, node=0x4893b78) at eval.c:3376
#47 0x000000000041aacb in rb_yield_0 (val=132618280, self=74960600, klass=, flags=, avalue=2) at eval.c:5239
#48 0x000000000041aacb in rb_yield_0 (val=70241560, self=74960600, klass=, flags=, avalue=0) at eval.c:5239
#49 0x000000000048fd01 in rb_ary_each (ary=132621000) at array.c:1261
#50 0x000000000041c555 in rb_call0 (klass=21994320, recv=132621000, id=4001, oid=, argc=,
argv=, body=0x14f9308, flags=0) at eval.c:6058
#51 0x000000000041c733 in rb_call (klass=21994320, recv=132621000, mid=4001, argc=0, argv=0x0, scope=0, self=74960600) at eval.c:6308
#52 0x0000000000427a38 in eval_call (self=74960600, node=0x48906d0) at eval.c:3381
#53 0x0000000000426cdb in eval_iter (self=74960600, node=0x488ffc8) at eval.c:3200
#54 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=149745, oid=, argc=0, argv=0x7fff813f1e18, body=0x481e6c0,
flags=-2126569960) at eval.c:6211
---Type to continue, or q to quit---
#55 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=149745, argc=1, argv=0x7fff813f1e10, scope=1, self=74960600) at eval.c:6308
#56 0x0000000000427ccf in eval_fcall (self=74960600, node=0x4898470) at eval.c:3396
#57 0x0000000000426cdb in eval_iter (self=74960600, node=0x4893ad8) at eval.c:3200
#58 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=149737, oid=, argc=0, argv=0x7fff813f2400, body=0x481e760,
flags=-2126568448) at eval.c:6211
#59 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=149737, argc=2, argv=0x7fff813f23f0, scope=1, self=74960600) at eval.c:6308
#60 0x0000000000427ccf in eval_fcall (self=74960600, node=0x48988a8) at eval.c:3396
#61 0x000000000041958c in rb_eval (self=74960600, node=0x4898858) at eval.c:3858
#62 0x000000000041c42b in rb_call0 (klass=75623080, recv=74960600, id=149633, oid=, argc=0, argv=0x7fff813f27f8, body=0x481e7b0,
flags=-2126567432) at eval.c:6211
#63 0x000000000041c733 in rb_call (klass=75623080, recv=74960600, mid=149633, argc=1, argv=0x7fff813f27f0, scope=3, self=6) at eval.c:6308
#64 0x00000000004191ec in rb_call_super (argc=, argv=) at eval.c:6476
#65 0x00000000004193b5 in eval_super (self=0, node=0x483ac08) at eval.c:3441
#66 0x00000000004267cc in block_pass (self=, node=) at eval.c:9316
#67 0x00000000004272f3 in eval_ensure (self=74960600, node=0x483aa28) at eval.c:3291
#68 0x000000000041aacb in rb_yield_0 (val=132629640, self=74960600, klass=, flags=, avalue=2) at eval.c:5239
#69 0x000000000041b416 in proc_invoke (proc=, args=, self=, klass=74960440) at eval.c:9038
#70 0x000000000041bf12 in rb_call0 (klass=74960440, recv=74960600, id=149633, oid=, argc=,
argv=, body=0x477cd70, flags=0) at eval.c:6092
#71 0x000000000041c733 in rb_call (klass=74960440, recv=74960600, mid=149633, argc=1, argv=0x7fff813f3340, scope=0, self=74975160) at eval.c:6308
#72 0x0000000000427a38 in eval_call (self=74975160, node=0x48b6b50) at eval.c:3381
#73 0x000000000041aacb in rb_yield_0 (val=135232920, self=74975160, klass=, flags=, avalue=0) at eval.c:5239
#74 0x000000000041aacb in rb_yield_0 (val=138467880, self=74975160, klass=, flags=, avalue=0) at eval.c:5239
#75 0x000000000041aacb in rb_yield_0 (val=138467880, self=74975160, klass=, flags=, avalue=0) at eval.c:5239
#76 0x000000000048fd01 in rb_ary_each (ary=138491800) at array.c:1261
#77 0x000000000041c555 in rb_call0 (klass=21994320, recv=138491800, id=4001, oid=, argc=,
argv=, body=0x14f9308, flags=0) at eval.c:6058
#78 0x000000000041c733 in rb_call (klass=21994320, recv=138491800, mid=4001, argc=0, argv=0x0, scope=0, self=74975160) at eval.c:6308
#79 0x0000000000427a38 in eval_call (self=74975160, node=0x48bb808) at eval.c:3381
#80 0x0000000000426cdb in eval_iter (self=74975160, node=0x48bb0b0) at eval.c:3200
#81 0x000000000041958c in rb_eval (self=74975160, node=0x48bb038) at eval.c:3858
#82 0x00000000004261b7 in eval_while (self=74975160, node=0x48bab88) at eval.c:3118
#83 0x000000000041c42b in rb_call0 (klass=75513520, recv=74975160, id=149601, oid=, argc=0, argv=0x7fff813f4438, body=0x47fd038,
flags=-2126560200) at eval.c:6211
#84 0x000000000041c733 in rb_call (klass=75513520, recv=74975160, mid=149601, argc=1, argv=0x7fff813f4430, scope=1, self=74975160) at eval.c:6308
#85 0x0000000000427ccf in eval_fcall (self=74975160, node=0x48b9788) at eval.c:3396
#86 0x0000000000426cdb in eval_iter (self=74975160, node=0x48b7578) at eval.c:3200
#87 0x000000000041c42b in rb_call0 (klass=75513520, recv=74975160, id=149617, oid=, argc=0, argv=0x7fff813f4a20, body=0x47fcf98,
flags=-2126558688) at eval.c:6211
#88 0x000000000041c733 in rb_call (klass=75513520, recv=74975160, mid=149617, argc=0, argv=0x7fff813f4a20, scope=3, self=6) at eval.c:6308
#89 0x00000000004191ec in rb_call_super (argc=, argv=) at eval.c:6476
#90 0x00000000004193b5 in eval_super (self=0, node=0x483ac08) at eval.c:3441
#91 0x00000000004266c1 in block_pass (self=, node=) at eval.c:9363
#92 0x00000000004272f3 in eval_ensure (self=74975160, node=0x483aa28) at eval.c:3291
#93 0x000000000041aacb in rb_yield_0 (val=74960080, self=74975160, klass=, flags=, avalue=2) at eval.c:5239
#94 0x000000000041b416 in proc_invoke (proc=, args=, self=, klass=74972880) at eval.c:9038
#95 0x000000000041bf12 in rb_call0 (klass=74972880, recv=74975160, id=149617, oid=, argc=,
argv=, body=0x477fe08, flags=0) at eval.c:6092
#96 0x000000000041c733 in rb_call (klass=74972880, recv=74975160, mid=149617, argc=0, argv=0x0, scope=1, self=74975160) at eval.c:6308
#97 0x0000000000427ccf in eval_fcall (self=74975160, node=0x48b6ab0) at eval.c:3396
#98 0x0000000000426cdb in eval_iter (self=74975160, node=0x48b6ad8) at eval.c:3200
#99 0x000000000041aacb in rb_yield_0 (val=74960600, self=74975160, klass=, flags=, avalue=0) at eval.c:5239
#100 0x000000000041958c in rb_eval (self=75623080, node=0x48a6c50) at eval.c:3858
#101 0x000000000041c42b in rb_call0 (klass=75623960, recv=75623080, id=149625, oid=, argc=0, argv=0x7fff813f5d70, body=0x481ed00,
flags=-2126553744) at eval.c:6211
#102 0x000000000041c733 in rb_call (klass=75623960, recv=75623080, mid=149625, argc=2, argv=0x7fff813f5d60, scope=0, self=74975160) at eval.c:6308
#103 0x0000000000427a38 in eval_call (self=74975160, node=0x48b6d80) at eval.c:3381
#104 0x0000000000426cdb in eval_iter (self=74975160, node=0x48b6a38) at eval.c:3200
#105 0x000000000041c42b in rb_call0 (klass=75513520, recv=74975160, id=148761, oid=, argc=0, argv=0x7fff813f6338, body=0x47fcf48,
flags=-2126552264) at eval.c:6211
#106 0x000000000041c733 in rb_call (klass=75513520, recv=74975160, mid=148761, argc=1, argv=0x7fff813f6330, scope=0, self=22049440) at eval.c:6308
#107 0x0000000000427a38 in eval_call (self=22049440, node=0x492d138) at eval.c:3381
#108 0x00000000004272f3 in eval_ensure (self=22049440, node=0x492cbc0) at eval.c:3291
#109 0x000000000041958c in rb_eval (self=22049440, node=0x492cb48) at eval.c:3858
---Type to continue, or q to quit---
#110 0x000000000042b27c in eval (self=, src=, scope=4, file=0x4a4426 "(eval)", line=)
at eval.c:6711
#111 0x000000000042b69c in rb_f_eval (argc=, argv=, self=22049440) at eval.c:6832
#112 0x000000000041c555 in rb_call0 (klass=22059320, recv=22049440, id=4097, oid=, argc=,
argv=, body=0x1505e00, flags=0) at eval.c:6058
#113 0x000000000041c733 in rb_call (klass=22059320, recv=22049440, mid=4097, argc=1, argv=0x7fff813f6b00, scope=1, self=22049440) at eval.c:6308
#114 0x0000000000427ccf in eval_fcall (self=22049440, node=0x1b17be0) at eval.c:3396
#115 0x000000000042a2f6 in rb_load (fname=28463080, wrap=) at eval.c:7199
#116 0x000000000042aa9a in rb_require_safe (fname=21909440, safe=) at eval.c:7573
#117 0x000000000041c555 in rb_call0 (klass=22059360, recv=22049440, id=13521, oid=, argc=,
argv=, body=0x14e92f0, flags=0) at eval.c:6058
#118 0x000000000041c733 in rb_call (klass=22059360, recv=22049440, mid=13521, argc=1, argv=0x7fff813f7200, scope=1, self=22049440) at eval.c:6308
#119 0x0000000000427ccf in eval_fcall (self=22049440, node=0x18c1918) at eval.c:3396
#120 0x000000000042710c in eval_rescue (self=22049440, node=0x18c1300) at eval.c:3237
#121 0x0000000000419c43 in rb_eval (self=22049440, node=0x18c1300) at eval.c:3991
#122 0x000000000041c42b in rb_call0 (klass=22059320, recv=22049440, id=10105, oid=, argc=0, argv=0x7fff813f7728, body=0x18c0e28,
flags=-2126547160) at eval.c:6211
#123 0x000000000041c733 in rb_call (klass=22059320, recv=22049440, mid=10105, argc=1, argv=0x7fff813f7720, scope=1, self=22049440) at eval.c:6308
#124 0x0000000000427ccf in eval_fcall (self=22049440, node=0x14e4f70) at eval.c:3396
#125 0x0000000000429c69 in ruby_exec_internal () at eval.c:1685
#126 0x0000000000429cb5 in ruby_exec () at eval.c:1705
#127 0x0000000000429ce5 in ruby_run () at eval.c:1715
#128 0x00000000004106c1 in main (argc=10, argv=0x7fff813f7a28, envp=) at main.c:48
推荐答案
当你看到这样的东西时:rb_call (klass=37665480, recv=132610480, mid=104367, ...
When you see something like this: rb_call (klass=37665480, recv=132610480, mid=104367, ...
您可以弄清楚 ruby 代码在做什么.我有一篇关于此的博客文章:
You can figure out what the ruby code is doing. I have a blog article on that:
http://seclib.blogspot.com/2011/08/inspect-ruby-process-from-gdb.html
这篇关于在 Ruby 解释器段错误之后，是否可以从 corefile 中获取 Ruby 回溯?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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