From: "Radosław Bułat" <radek.bulat@...>
Date: 2008-11-16T20:54:34+09:00
Subject: [ruby-core:19965] ruby "[BUG] " and backtrace of native function call - addr2line - useless info

I attempt to use ruby1.9 from trunk to have fun with it or just try.
But sometimes I get like this:

/home/radarek/opt/lib/ruby1.9/gems/1.9.0/gems/nokogiri-1.0.6/lib/nokogiri/xml/node.rb:56:
[BUG] unknown type 0x22 (0xc given)
ruby 1.9.0 (2008-11-14 revision 20235) [x86_64-linux]

-- control frame ----------
c:0006 p:---- s:0020 b:0020 l:000019 d:000019 CFUNC  :root
c:0005 p:0056 s:0017 b:0017 l:000016 d:000016 METHOD
/home/radarek/opt/lib/ruby1.9/gems/1.9.0/gems/nokogiri-1.0.6/lib/nokogiri/xml/node.rb:56
c:0004 p:0033 s:0011 b:0011 l:000010 d:000010 METHOD
/home/radarek/opt/lib/ruby1.9/gems/1.9.0/gems/nokogiri-1.0.6/lib/nokogiri/xml/node.rb:79
c:0003 p:0199 s:0007 b:0007 l:000006 d:000006 TOP    html2ascii.rb:31
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP
---------------------------
DBG> : "/home/radarek/opt/lib/ruby1.9/gems/1.9.0/gems/nokogiri-1.0.6/lib/nokogiri/xml/node.rb:56:in
`root'"
DBG> : "/home/radarek/opt/lib/ruby1.9/gems/1.9.0/gems/nokogiri-1.0.6/lib/nokogiri/xml/node.rb:56:in
`xpath'"
DBG> : "/home/radarek/opt/lib/ruby1.9/gems/1.9.0/gems/nokogiri-1.0.6/lib/nokogiri/xml/node.rb:79:in
`css'"
DBG> : "html2ascii.rb:31:in `<main>'"
-- backtrace of native function call (Use addr2line) --
0x7f28e48b8661
0x7f28e47da88e
0x7f28e47da9e3
0x7f28e47dae8e
0x7f28e2af3e5e
0x7f28e48a7c4b
0x7f28e48a8d37
0x7f28e48ae7f4
0x7f28e48ae9e2
0x7f28e47dcb14
0x7f28e47de1a3
0x4009cf
0x7f28e394f466
0x4008b9
-------------------------------------------------------

As was pointed on ruby-core several months ago (by ko1) there we can
use addr2line to obtain ruby native stack trace:
I cd to ruby1.9 source directory and type:
$ addr2line -e ./ruby1.9
0x7f28e48b8661
0x7f28e47da88e
0x7f28e47da9e3
0x7f28e47dae8e
0x7f28e2af3e5e
0x7f28e48a7c4b
0x7f28e48a8d37
0x7f28e48ae7f4
0x7f28e48ae9e2
0x7f28e47dcb14
0x7f28e47de1a3
0x4009cf
0x7f28e394f466
0x4008b9??:0
??:0
??:0
??:0
??:0
??:0
??:0
??:0
??:0
??:0
??:0
/home/radarek/opt/src/ruby1.9/main.c:37
??:0

As you see I get useless info and only one function call is present.
Am I doing it wrong or it's ok? Maybe should I compile ruby with
special CFLAGS or other options? Any ideas?

-- 
Pozdrawiam

Rados�aw Bu�at
http://radarek.jogger.pl - m�j blog