MIRACLE LINUX

2010

/2010130

Debug HacksISBN 978-4873114040

YLUG(Linux Users Group)

/hyoshiok
http://d.hatena.ne.jp/hyoshiok

http://blog.miraclelinux.com/yume/

hyoshiok@gmail.com

http://twitter.com/hyoshiok

OSRDBMS

HOW

WHAT

WHY

HOWWHATWHY

IT

1999Linux

1999/4

2009/10100Linus

OSS

Unix/Linux

100K
100
10

100K1M
1001000
100

1M
1000
100

find -type f -name "*.[ch]"|wc

find -type f -name "*.[ch]"|xargs wc|grep total

doc

lib

test

src

README, INSTALL, COPYING,

(Docs)

ChangeLog

ChangeLog/Release Notes

Linux git/Subversion/CVS

Mailing List

Wiki

blog

Google

Mailing List

Bug database

emacs

gdb

cscope

(crash)

make

strace

ltrace

gdb

oprofile

make

make

gcc -g (
MakefileCFLAGS

cscope

emacsshell

strace

$ strace ruby -vexecve("/usr/local/bin/ruby", ["ruby", "-v"], [/* 39 vars */]) = 0uname({sys="Linux", node="asianux2.miraclelinux.com", ...}) = 0brk(0) = 0x976a000access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)open("/etc/ld.so.cache", O_RDONLY) = 3fstat64(3, {st_mode=S_IFREG|0644, st_size=89946, ...}) = 0old_mmap(NULL, 89946, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7fea000close(3) = 0open("/lib/libdl.so.2", O_RDONLY) = 3

gdb

http://savannah.gnu.org/projects/gdb

gdb

gcc -g

printf

gdb

run

bt

p

c s n

oprofile

# opcontrol --start

# opcontrol --stop

# opreport -l

http://oprofile.sourceforge.net/news/

oprofile

CPU: Core Solo / Duo, speed 2666.77 MHz (estimated)

Counted DCACHE_PEND_MISS events (Weighted cycles of L1 miss outstanding) with

a unit mask of 0x00 (Weighted cycles) count 100000

vma samples % linenr info app name symbol name

000000000042be50 244787 33.2383 gc.c:1661 ruby os_each_obj

000000000042bfac 1 4.1e-04 gc.c:1599

000000000042bfb9 5 0.0020 gc.c:1599

000000000042bfbe 6 0.0025 gc.c:1599

000000000042bfd0 4862 1.9862 gc.c:1601

000000000042bfd3 228573 93.3763 gc.c:1601

000000000042bfd6 2698 1.1022 gc.c:1601

000000000042bfd8 250 0.1021 ruby.h:672

oprofile

$ time find -type f -name \ '*.[ch]' -or -name '*.cpp' \ -or -name '*.cxx' | xargs \ egrep -l hogehoge

$ time grep -r \
include='*.[ch]' hogehoge .

hogehoge

cscope
http://cscope.sourceforge.net/

lxr
http://lxr.linux.no/

GNU GLOBAL
http://www.gnu.org/software/global/

ack-grep

Linux

LINUX ISBN:487311313X

Linux2.6 ISBN:4797338261

ISBN:4839912653

DEBUG HACKS ISBN:978-4873114040

Ruby ISBN:4844317210(

http://i.loveruby.net/ja/rhg/

http://blog.miraclelinux.com/yume/

(524)

http://blog.miraclelinux.com/yume/2007/08/post_d6bd.html

99)

http://blog.miraclelinux.com/yume/2007/08/post_d3eb.html

http://blog.miraclelinux.com/yume/

/hyoshiok

http://d.hatena.ne.jp/hyoshiok/

2

3

4

5

6

7

8

9

01/30/10

MIRACLE LINUX

2

3

4

5

6

7

8

9

Ruby 1.8.5257197767

Linux 2.6.1816522680

MySQL 5.0.24a1795988463

??? ??? (???)2008/07/30, 09:21:45 /

??? ??? (???)2007/10/15, 21:13:50 /

ChangeLog

??? ??? (???)2007/10/15, 21:13:51 /

ChangeLogcscope

(gdb)straceoprofilestrace

??? ??? (???)2007/10/16, 09:49:57 /