Issue #10389 has been reported by Akira T…
Bug #10389: SEGV after SEGV
- Author: Akira T.
- Status: Open
- Priority: Normal
- Assignee:
- Category:
- Target version:
- ruby -v: ruby 2.2.0dev (2014-10-15 trunk 47951) [x86_64-linux]
- Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
最近、SEGV したときに、さらに SEGV することがあります。
% ./miniruby -e 'Process.kill(:SEGV, $$)'
-e:1: [BUG] Segmentation fault at 0x0003e800003c63
ruby 2.2.0dev (2014-10-15 trunk 47951) [x86_64-linux]
-- Control frame information
-----------------------------------------------
c:0003 p:---- s:0009 e:000008 CFUNC :kill
c:0002 p:0015 s:0004 E:000080 EVAL -e:1 [FINISH]
c:0001 p:0000 s:0002 E:0006f0 TOP [FINISH]
-- Ruby level backtrace information
----------------------------------------
-e:1:in `<main>'
zsh: segmentation fault ./miniruby -e 'Process.kill(:SEGV, $$)'
gdb で動かしてみると、RSTRING_PTR に 0 を渡しているようです。
% gdb miniruby
GNU gdb (Debian 7.7.1+dfsg-3) 7.7.1
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copying"
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Type "show configuration" for configuration details.
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Reading symbols from miniruby...done.
(gdb) run -e 'Process.kill(:SEGV, $$)'
Starting program: /home/ruby/tst1/ruby/miniruby -e 'Process.kill(:SEGV,
$$)'
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff7ff5700 (LWP 15526)]
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6e8d347 in kill () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: そのようなファイルやディレクトリはありません.
(gdb) c
Continuing.
-e:1: [BUG] Segmentation fault at 0x0003e800003ca2
ruby 2.2.0dev (2014-10-15 trunk 47951) [x86_64-linux]
-- Control frame information
-----------------------------------------------
c:0003 p:---- s:0009 e:000008 CFUNC :kill
c:0002 p:0015 s:0004 E:0014e0 EVAL -e:1 [FINISH]
c:0001 p:0000 s:0002 E:001ac0 TOP [FINISH]
-- Ruby level backtrace information
----------------------------------------
-e:1:in `<main>'
Program received signal SIGSEGV, Segmentation fault.
0x000055555572f64c in oldbt_bugreport (arg=0x555555a8a78c,
file=93824997590200, line=1, method=0) at vm_backtrace.c:759
759 fprintf(stderr, "%s:%d:in `%s'\n", filename, line,
RSTRING_PTR(method));
(gdb) p filename
$1 = 0x555555a704c8 "-e"
(gdb) p line
$2 = 1
(gdb) p method
$3 = 0
(gdb)
CI の履歴をみると、おそらく r47914 あたりからな気がします。
http://chkbuild002.hsbt.org/chkbuild/ruby-trunk/log/20141014T080011Z.diff.html.gz