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@sartak
DTRACE
printf debugging for seventh-level wizards
࠷ڧͳຐ๏͍ͷprintfͷΑ͏ͳσόοΨ
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ࣗݾհ
ɹShawn M Mooreɹ
ˏsartak
Mooseʹ͍͔͞͞ߩݙ͠Α͏ͱ͢Δ
ϘετϯʹॅΜͰ͍Δ
ձࣾ: Infinity Interactive
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ॻ͍ͨϞʔδϡϧ
MooseX::Role::Parameterized
Any::Moose
cpandoc
Carp::REPL
Path::Dispatcher
App::Nopaste
(CPAN: SARTAK)
ଞʹɺΘͳ͍ͷํ͕͍͍ͬͯଟ͘ͷϞʔδϡϧ
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DTRACE
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ࠓɺίϯϐϡʔλ͕ԿΛͯ͠Δͷʁ
࣭:
͑: DTraceͰΔ͜ͱʹͳΕΔ
ਖ਼ͳ͑:
͍͍ͨͯɺχίχίͰಲೣΛ؍ͯΔ
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iotop
͔ͯ͠͠ɺΒͣʹ͢ͰʹDTraceΛ͍ͬͯͨʂ
$ iotop
dtrace: failed to initialize dtrace:
DTrace requires additional privileges
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OS X & Solaris(શ෦). Linux(͔͠Εͳ͍)
ϓϩϑΝΠϥʔ
(NYTProfΑΓਂ͘)
σόοΨʔ
ΧʔωϧϞʔδϡϧ
(DTraceΛOSʹϙʔτ͠ͳͯ͘ɺ
OSΛDTraceʹϙʔτ͢Δͬͯ)
DTRACE
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XCodeͷϓϩϑΝΠϥDTraceΛ͏
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dtruss
iotop
opensnoop
iosnoop
pidpersec
man -k dtrace
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DTraceͱ৮
ɾΧʔωϧ (syscallؚΜͩ) ͷؔΛݺͼɺฦ͠
ɾPerlͷؔΛݺͼɺΓ
ɾSQL࣮ߦ
ɾthreads
ɾsignals
ɾଞͷΠϕϯτ͕ଟ͍
ϓϩʔϒ
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ϓϩάϥϜՄೳ
dtrace -n '
syscall::open:entry
/strstr(copyinstr(arg0), "corpus") != NULL/ {
printf("%s %s",execname,copyinstr(arg0));
}'
ʮcorpusʯͱ͍͏ϑΝΠϧΛ։͘ϓϩηεΛදࣔ
͕͜ͷεΫϦϓτΛॻ͍ͯͬͨ
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ϓϩάϥϜՄೳ
dtrace -n '
syscall::open:entry
/strstr(copyinstr(arg0), "corpus") != NULL/ {
printf("%s %s",execname,copyinstr(arg0));
}'
ʮcorpusʯͱ͍͏ϑΝΠϧΛ։͘ϓϩηεΛදࣔ
͕͜ͷεΫϦϓτΛॻ͍ͯͬͨ
Πϕϯτ(ϓϩʔϒͷهड़)
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ϓϩάϥϜՄೳ
dtrace -n '
syscall::open:entry
/strstr(copyinstr(arg0), "corpus") != NULL/ {
printf("%s %s",execname,copyinstr(arg0));
}'
ʮcorpusʯͱ͍͏ϑΝΠϧΛ։͘ϓϩηεΛදࣔ
͕͜ͷεΫϦϓτΛॻ͍ͯͬͨ
ड़ޠ
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ϓϩάϥϜՄೳ
dtrace -n '
syscall::open:entry
/strstr(copyinstr(arg0), "corpus") != NULL/ {
printf("%s %s",execname,copyinstr(arg0));
}'
ʮcorpusʯͱ͍͏ϑΝΠϧΛ։͘ϓϩηεΛදࣔ
͕͜ͷεΫϦϓτΛॻ͍ͯͬͨ
ΞΫγϣϯ
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ϓϩάϥϜՄೳ
dtrace -n '
syscall::open:entry
/strstr(copyinstr(arg0), "corpus") != NULL/ {
printf("%s %s",execname,copyinstr(arg0));
}'
ʮcorpusʯͱ͍͏ϑΝΠϧΛ։͘ϓϩηεΛදࣔ
͕͜ͷεΫϦϓτΛॻ͍ͯͬͨ
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σόοΨʔ
Request Tracker (rt.cpan.orgͱ͔)Ͱ
mod_perlͷςετΛࣦഊͯͨ͠ɻ
ͷίϯϐϡʔλ͚ͩͰɻ
ͨͿΜຊޠ͔ͩΒɻ
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σόοΨʔ
Failed test
'gpg: error reading key: ެ։伴͕ݟ͔ͭΓ·ͤΜ'
doesn't match '(?-xism:public key not found)'
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σόοΨʔ
RTຊޠ൛͕͋Δ͚Ͳɺ
ʮެ։伴͕ݟ͔ͭΓ·ͤΜʯͱ͍͏༁͕ɾɾɾͳ͔ͬͨʂʁ
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σόοΨʔ
͋ʂͦͷจGPG͔Βདྷ͔ͨͳɾɾɾ
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σόοΨʔ
gpg-2.0.18 $ ack -a ެ։伴͕ݟ͔ͭΓ·ͤΜ
gpg-2.0.18 $
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σόοΨʔ
gpg-2.0.18 $ echo "ެ։伴͕ݟ͔ͭΓ·ͤΜ" |
iconv -f UTF-8 -t EUCJP | xargs ack -ao |
iconv -f EUCJP -t UTF-8
Binary file po/ja.gmo matches
po/ja.po:2965:ެ։伴͕ݟ͔ͭΓ·ͤΜ
po/ja.po:6525:ެ։伴͕ݟ͔ͭΓ·ͤΜ
po/ja.po:8311:ެ։伴͕ݟ͔ͭΓ·ͤΜ
gpg-2.0.18 $
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σόοΨʔ
͜ͷࣦഊmod_perl͚͔ͩͩΒɺڥม͕ؒҧ͏ͩΖ͏
$LANGɺ$LC_ALL
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σόοΨʔ
LC_ALL=en gpg
LC_ALL=ja gpg
LC_ALL= gpg
opensnoop
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σόοΨʔ
DTraceΛΘͳ͍Ͱɺ
GPGͷࣗମʹprintΛଟ͘Ճ͢Δඞཁ
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DTraceΛ͏ؾͳ͍ͥɻ
ͳͥͳΒɺࠓ͜ͷΞϓϦͷ͍ཧ༝Λௐ͍͕ͨɺ
͋ΒΏΔΞϓϦͷ͍ཧ༝Λݚڀ͢ΔઐՈʹੜ֔Λ͛ͨ͘͞͞ͳ͍Μͩɻ
(༁૬ͰͨΒΊͰ͢ɺΰϝϯͳʂ)
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͑͑͑͑͑ʁ
ੑೳղੳ͕Լखʹଓ͚͍͔ͨʁ
͋ΒΏΔΞϓϦΛߴԽʹग़དྷͳ͍ʁ
ͦͷϘιϘιͰDTraceΛࢍͩͱࢥ͏
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ҙʂ
DTraceͷݴޠɺʮifʯ͕ͳ͍ʂ
ΘΓʹɺड़ޠΛ͍·͠ΐ͏Ͷ
ß
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ҙʂ
probe {
if (ok) {
x;
} else {
y;
}
}
probe /ok/ {
x;
}
probe /!ok/ {
y;
}
ͳͥͳΒɺDTrace͕ҋຐज़Λ͏ͩΖ͏
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Perl
ɾ5.10.0Ҏ߱: sub-entry, sub-return
ɾ5.15.1Ҏ߱: phase-change (${^GLOBAL_PHASE})
ɹ
ɾকདྷʁ: string eval
perldoc perldtrace
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Perl
ɾ5.10.0Ҏ߱: sub-entry, sub-return
ɾ5.15.1Ҏ߱: phase-change
ɹ
ɾকདྷʁ: string eval
ͷ࠷ॳPerlʹύονʂ
؆୯ͩͬͨʂ
perldtrace
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͍ͤͪ͝ΐ͏
͋Γ͕ͱ͏
͍͟͝·ͨ͠
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one more thing . . .
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օͷݸਓͷεϙϯαʔ
ຊʹ
͋Γ͕ͱ͏͍͟͝·͢
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࣭͋Γ·ͤΜ͔ʁ
ຊޠͰ̤̠Ͱ͢ʂ
slides: http://twitter.com/sartak
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