C memory segmentation fault

[Moore]

Hi,

Im getting the following segmentation fault from some C code on x86

(gdb) bt full
#0  0xfeb3487a in _malloc_unlocked () from /usr/lib/libc.so.1
No symbol table info available.
#1  0xfeb34704 in malloc () from /usr/lib/libc.so.1
No symbol table info available.

If I can rule out something wrong in the stack, then since this seg fault
happens in memory management , then maybe its the heap that at fault.

RESOLVED: it did turn out to be heap related.

[Lindley]

The first thing to check is that you aren't running out of memory. A glance at top should show you the current memory usage. Is this a 32-bit or a 64-bit system?

[Moore]

Hello,
Thanks for reply.
This is 32 bit binary.
No problem with memory availability.
I have seen the process dump core with core size well less that 1G (which is significantly smaller than max ~4G process address space.).
Have not seen the process grow greater than 600M before core.

[Lindley]

Indeed that does not seem to be the problem, then. In practice, a 32-bit process will run into memory trouble only once it is using 1.5-2GB on Windows systems, and perhaps a bit more on Linux.

[Moore]

topic resolved.