File.read (または String#include?) でSEGV

e$B%o%J%Y$H?=$7$^$9!#e(B

MinGWe$B>e$Ne(BHEADe$B$G0J2<$N%9%/%j%W%H$rAv$i$;$k$He(Bi=200e$B!Ae(B2000e$B$N$"$?$j$Ge(BSEGVe$B$r5/$3$7$^$7$?!#e(B

(1<<16).times do |i|
p i
File.read(FILE, 20).include?(MD5SUM =)
end

e$B$$=$i$/F1$88=>]$Ge(B meka test-all e$B$,e(B rubygems/format.rb
e$B$Ge(B * e$B$^$l$Ke(B * SEGV e$B$7$^$9!#e(B
GCe$B<~$j$+$H;W$&$N$G$9$,!"e(BGC.stress=truee$B$G$be(BGC.disablee$B$G$b:F8=$7$J$$$N$G$
e$2$G$7$?!#e(B
[ruby-dev:34185] e$B$Ne(BSEGV
e$B$b$3$l$N$;$$$+$b!D$H$$$&$N$O$5$9$,$KET9g$h$/9M$($9$.$G$7$g$&$+!#e(B

e$BJL7o$G$9$,!"e(BMinGW e$B$K$Oe(B _longjmp

e$B$,$J$$$?$a!!e(Brev.15875 e$B$O%S%k%I$K<:GT$7$^$9!#e(B

_setjmp e$B$,$"$C$Fe(B _longjmp

e$B$,$J$$$h$&$J$*$+$7$J4D6-$r;H$&$[$&$,[email protected]$H$O;W$$$^$9$,!#e(B

[email protected]$G$9!#e(B

At Tue, 1 Apr 2008 10:40:28 +0900,
wanabe wrote in [ruby-dev:34194]:

MinGWe$B>e$Ne(BHEADe$B$G0J2<$N%9%/%j%W%H$rAv$i$;$k$He(Bi=200e$B!Ae(B2000e$B$N$"$?$j$Ge(BSEGVe$B$r5/$3$7$^$7$?!#e(B

(1<<16).times do |i|
p i
File.read(FILE, 20).include?(MD5SUM =)
end

e$B?t2s7+$jJV$7$^$7$?$,!"e(BLinuxe$B$G$be(Bmingwe$B$G$b:F8=$G$-$^$;$s$G$7$?!#e(B
mingwe$B$N%3%s%Q%$%i$N%P!<%8%g%s$H!e(BCFLAGSe$B$J$I$r65$($F$/[email protected]$5$$!#2De(B
e$BG=$G$$l$P!"e(Bgdbe$B$N%P%C%/%H%l!<%9$r8+$;$F$b$i$($k$H=u$+$j$^$9!#e(B

e$BJL7o$G$9$,!"e(BMinGW e$B$K$Oe(B _longjmp e$B$,$J$$$?$a!!e(Brev.15875 e$B$O%S%k%I$K<:GT$7$^$9!#e(B

_setjmp e$B$,$"$C$Fe(B _longjmp e$B$,$J$$$h$&$J$*$+$7$J4D6-$r;H$&$[$&$,[email protected]$H$O;W$$$^$9$,!#e(B

e$B$3$A$i$OD>$7$^$7$?!#e(B

e$B%o%J%Y$G$9!#e(B

08/04/01 e$B$Ke(B Nobuyoshi N.[email protected]
e$B$5$s$O=q$-$^$7$?e(B:

e$B?t2s7+$jJV$7$^$7$?$,!"e(BLinuxe$B$G$be(Bmingwe$B$G$b:F8=$G$-$^$;$s$G$7$?!#e(B
mingwe$B$N%3%s%Q%$%i$N%P!<%8%g%s$H!e(BCFLAGSe$B$J$I$r65$($F$/[email protected]$5$$!#2De(B
e$BG=$G$$l$P!"e(Bgdbe$B$N%P%C%/%H%l!<%9$r8+$;$F$b$i$($k$H=u$+$j$^$9!#e(B

e$B$9$_$^$;$s$"$j$,$H$&$4$6$$$^$9!#e(Bgcc e$B$Oe(B SF.net
e$B$+$i%@%&%s%m!<%I$7$?e(B
gcc-core-3.4.5-20060117-1.tar.gz [email protected]$H5-21$7$F$$$^$9!#e(B

$ gcc -v
Reading specs from c:/MinGW/bin//lib/gcc/mingw32/3.4.5/specs
Configured with: /gcc-3.4.5/configure --with-gcc --with-gnu-ld
with-gnu-as --host=mingw32 --target=mingw32 --prefix=/mingw
enable-threads --disable-nls
enable-languages=c,c++,f77,ada,objc,java --disable-win32-registry
disable-shared --enable-sjlj-exceptions --enable-libgcj
disable-java-awt --without-x --enable-java-gc=boehm
disable-libgcj-debug --enable-interpreter
enable-hash-synchronization --enable-libstdcxx-debug
Thread model: win32
gcc version 3.4.5 (mingw special)

CFLAGS
e$B$H$$$&$N$O4D6-JQ?t$N$3$H$G$7$g$&$+!)$3$l$O6u$K$J$C$F$$$^$9!#e(B
e$B%S%k%I;~$K$Oe(B Makefile e$B$K=q$+$l$F$$$ke(B -g -O2
[email protected]$1$,M-8z$K$J$C$F$$$k$h$&$G$9!#e(B
e$BG0$N$?$aIU5-$7$^$9$H!"e(BWinXP Home e$B$Ne(B SP2 e$B$G0lHL%f!<%6$Ge(B
MSYS e$B>e$+$i<B9T$7$F$$$^$9!#e(B

gdb e$B$r$+$^$;$k$H$J$<$+:F8=$7$J$/$J$j$^$9!#e(B
e$B$3$A$i$N4D6-$,$I$3$+$GIe$C$F$$$k!"$H9M$($k$N$,0lHVBEEv$N$h$&$K;W$$$^$9!#e(B
e$B$G$"$l$P!"e(BSEGV
e$B$9$k$h$&$J%Q%C%A$,6vA3<j85$G$&$^$/[email protected]@$,$D$-$^$9!#e(B
e$B2?EY$b$*A{$,$;$7$^$7$?!#e(B

[email protected]$G$9!#e(B

At Tue, 1 Apr 2008 18:15:36 +0900,
wanabe wrote in [ruby-dev:34198]:

CFLAGS e$B$H$$$&$N$O4D6-JQ?t$N$3$H$G$7$g$&$+!)$3$l$O6u$K$J$C$F$$$^$9!#e(B
e$B%S%k%I;~$K$Oe(B Makefile e$B$K=q$+$l$F$$$ke(B -g -O2 [email protected]$1$,M-8z$K$J$C$F$$$k$h$&$G$9!#e(B
e$BG0$N$?$aIU5-$7$^$9$H!"e(BWinXP Home e$B$Ne(B SP2 e$B$G0lHL%f!<%6$Ge(B MSYS e$B>e$+$i<B9T$7$F$$$^$9!#e(B

MSYSe$B$G$9$+!#e(BMSYSe$B$C$F$^[email protected]/$b$A$c$s$HF0:n3NG$7$F$J$$$h$&$J5$$,$7e(B
e$B$^$9!#DL>oe(Bmingwe$BHGe(Brubye$B$H$$$&$H!"e(Bcygwine$B$Ne(B-mno-cygwine$B$N$[$&$r9M$($Fe(B
e$B$7$^$&$N$G!#e(B

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message Re: [ruby-dev:34248] Re: File.read (e$B$^$?$Oe(B
String#include?) e$B$Ge(BSEGV
on Fri, 4 Apr 2008 11:24:57 +0900, wanabe [email protected]
writes:

|e$B$h$/%=!<%9$rDI$C$F$_$k$HGo;RH4$1$9$k$[[email protected]$G$-$^$7$?!#e(B
|re.c e$B$OB>[email protected]$,I,MW$+$b$7$l$^$;$s$,!"$H$j$"$($:e(B SEGV e$B$O=P$J$/$J$j$^$7$?!#e(B

e$B$"$j$,$H$&$4$6$$$^$9!#<h$j9~$_$^$9!#e(B

e$B%o%J%Y$G$9!#e(B

e$B$h$/%=!<%9$rDI$C$F$_$k$HGo;RH4$1$9$k$[[email protected]$G$-$^$7$?!#e(B
re.c e$B$OB>[email protected]$,I,MW$+$b$7$l$^$;$s$,!"$H$j$"$($:e(B SEGV
e$B$O=P$J$/$J$j$^$7$?!#e(B

re.c.orig Tue Apr 1 20:15:20 2008
+++ re.c Thu Apr 3 19:38:49 2008
@@ -144,7 +144,7 @@
for (; x < xe; ++x)
qstable[x] = xe - x;
/
Searching */

  • for (; y < ye; y += *(qstable + y[m])) {
  • for (; y + m < ye; y += *(qstable + y[m])) {
    if (*xs == *y && memcmp(xs, y, m) == 0)
    return y - ys;
    }

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