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From: "Bruce Rosen" <rosen AT oingo DOT com>
To: <cygwin AT sourceware DOT cygnus DOT com>
Cc: "Bruce Rosen"@delorie.com
Subject: large memory allocation via new causes segmentation fault in G++ compiled programs
Date: Mon, 7 Aug 2000 12:23:36 -0700
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I'm running cygwin on a WINNT PIII machine with 785 meg of memory. The
program below compiles
without error both in g++ and MSVC6.0. The MSVC compile executable runs
correctly, but the
G++ compiled executable gives me a segmentation fault (returning 0 from new)
when over 128 meg
of memory is allocated.
Is there some way to correct the error? Here is the program:
int main()
{
char *p;
// allocate 150,000,000 bytes > 128 Meg limit
p = new char[150000000];
p[50] = 'a';
}
And here are the g++ parameters:
/bin/../lib/gcc-lib/i686-pc-cygwin/2.95.2/cpp.exe -lang-c -v -iprefix
/bin/../l
ib/gcc-lib/i686-pc-cygwin/2.95.2/ -D__GNUC__=2 -D__GNUC_MINOR__=95 -Di386 -D
_X86
=1 -D__STDC__=1 -D__stdcall=__attribute__((__stdcall__)) -D__cdecl=__attribu
te__
((__cdecl__)) -D__declspec(x)=__attribute__((x)) -D__i386__ -D_X86=1 -D__STD
C__=
1 -D__stdcall=__attribute__((__stdcall__)) -D__cdecl=__attribute__((__cdecl_
_))
-D__declspec(x)=__attribute__((x)) -D__i386 -Asystem(winnt) -Acpu(i386) -Ama
chin
e(i386) -remap -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ -Di686
-Dp
entiumpro -D__i686 -D__i686__ -D__pentiumpro -D__pentiumpro__ -D__CYGWIN32__
-D_
_CYGWIN__ -Dunix -D_WIN32 -DWINNT --help help-dummy /tmp/ccgw0dun.i
GNU CPP version 2.95.2 19991024 (release-2) (80386, BSD syntax)
/bin/../lib/gcc-lib/i686-pc-cygwin/2.95.2/collect2.exe -Bdynamic --help
/usr/li
b/gcc-lib/i686-pc-cygwin/2.95.2/../../../../i686-pc-cygwin/lib/crt0.o -L/bin
/../
lib/gcc-lib/i686-pc-cygwin/2.95.2 -L/bin/../lib/gcc-lib -L/usr/lib/gcc-lib/i
686-
pc-cygwin/2.95.2 -L/usr/lib/gcc-lib/i686-pc-cygwin/2.95.2/../../../../i686-p
c-cy
gwin/lib
/tmp/ccCJG2dS.o -lstdc++ -lgcc -lcygwin -luser32 -lkernel32 -ladvapi32
-lshell32 -lgcc
Any help would be appreciated.
thanks
bruce
Here is the cygcheck output:
cygcheck
Cygnus Win95/NT Configuration Diagnostics
Current System Time: Mon Aug 07 12:19:10 2000
WinNT Ver 4.0 build 1381 Service Pack 4
Path:
.
/usr/local/bin
/bin
/WINNT/system32
/WINNT
/Program Files/Mt
SysDir: C:\WINNT\System32
WinDir: C:\WINNT
HOME = `/WINNT/Profiles/rosen/Desktop'
MAKE_MODE = `unix'
PWD = `/WINNT/Profiles/rosen/Desktop/cyg'
USER = `administrator'
Use `-r' to scan registry
a: fd N/A N/A
c: hd NTFS 4000Mb 95% CP CS UN PA FC
d: cd CDFS 498Mb 100% CS TIPSTER_VOL_1
e: hd NTFS 10660Mb 19% CP CS UN PA FC
x: net NTFS 16159Mb 73% CP CS UN PA FC
C:\\bin /usr/bin user binmode
C:\\lib /usr/lib user binmode
C: / user binmode
Found: C:\bin\bash.exe
Found: \bin\bash.exe
Found: C:\bin\cat.exe
Found: \bin\cat.exe
Found: C:\bin\cpp.exe
Found: \bin\cpp.exe
Found: C:\bin\find.exe
Found: \bin\find.exe
Found: C:\bin\gcc.exe
Found: \bin\gcc.exe
Found: C:\bin\gdb.exe
Found: \bin\gdb.exe
Found: C:\bin\ld.exe
Found: \bin\ld.exe
Found: C:\bin\ls.exe
Found: \bin\ls.exe
Found: C:\bin\make.exe
Found: \bin\make.exe
Found: C:\bin\sh.exe
Found: \bin\sh.exe
83k 2000/06/11 C:\bin\cygitcl30.dll
35k 2000/06/11 C:\bin\cygitk30.dll
402k 2000/06/11 C:\bin\cygtcl80.dll
5k 2000/06/11 C:\bin\cygtclpip80.dll
10k 2000/06/11 C:\bin\cygtclreg80.dll
639k 2000/06/11 C:\bin\cygtk80.dll
587k 2000/03/01 C:\bin\cygwin1.dll
Cygwin DLL version info:
dll major: 1001
dll minor: 0
dll epoch: 19
dll bad signal mask: 19005
dll old termios: 00005
api major: 0
api minor: 17
shared data: 3
dll identifier: cygwin1
mount registry: 2
cygnus registry name: Cygnus Solutions
cygwin registry name: Cygwin
program options name: Program Options
cygwin mount registry name: mounts v2
build date: Wed Mar 1 00:15:19 EST 2000
snapshot date: 2000-02-29-23:55-EST
shared id: cygwin1S3-2000-03-01 00:15:19
Bruce Rosen, Ph.D.
Chief Scientist, Oingo Inc
10474 Santa Monica Bl.
Los Angeles, CA 90025
Phone: (310) 446 8162
E-mail: rosen AT oingo DOT com
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