Hi,
the attached program segfaults when using a larger local variable.
Depending on used value I get segfaulst at different locations.
//#define BUFSIZE (9*1024*1024-16*1024) // only segfault #define BUFSIZE (8*1024*1024-16*1024) // hello + segfault //#define BUFSIZE (8*1024*1024-32*1024) // hello + 2nd line
When using last definition of BUFSIZE every thing is fine.
stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ ./test Speicherzugriffsfehler stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ vi test.cc stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ g++ -g test.cc -o test stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ ./test hello ./test: argc = 1 stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ vi test.cc stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ g++ -g test.cc -o test stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ ./test hello Speicherzugriffsfehler stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ ./test stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ ulimit unlimited stefan@jarada /home/nfs/extra/src/video/DVB/xlist $ gcc --version gcc (GCC) 4.1.2 (Gentoo 4.1.2 p1.1) Copyright (C) 2006 Free Software Foundation, Inc. Dies ist freie Software; die Kopierbedingungen stehen in den Quellen. Es gibt KEINE Garantie; auch nicht für MARKTGÄNGIGKEIT oder FÜR SPEZIELLE ZWECKE.
On Samstag, 29. November 2008, Stefan Lucke wrote:
Hi,
Hi Stefan!
the attached program segfaults when using a larger local variable.
Depending on used value I get segfaulst at different locations.
//#define BUFSIZE (9*1024*1024-16*1024) // only segfault #define BUFSIZE (8*1024*1024-16*1024) // hello + segfault //#define BUFSIZE (8*1024*1024-32*1024) // hello + 2nd line
When using last definition of BUFSIZE every thing is fine.
I guess linux has some limit on the stack-size. Sounds like 8MB in your case. But why can't you just alloc large data on the heap with malloc as everyone else does?
Regards Matthias
Matthias Schwarzott wrote:
On Samstag, 29. November 2008, Stefan Lucke wrote:
Hi,
Hi Stefan!
the attached program segfaults when using a larger local variable.
Depending on used value I get segfaulst at different locations.
//#define BUFSIZE (9*1024*1024-16*1024) // only segfault #define BUFSIZE (8*1024*1024-16*1024) // hello + segfault //#define BUFSIZE (8*1024*1024-32*1024) // hello + 2nd line
When using last definition of BUFSIZE every thing is fine.
I guess linux has some limit on the stack-size. Sounds like 8MB in your case.
See man getrlimit, sub-section RLIMIT_STACK.
- Petri
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Matthias Schwarzott -
Petri hintukainen -
Stefan Lucke