Hi Praveen, On Wed, Feb 23, 2011 at 11:58 PM, Praveen kumar <chatpravi@gmail.com> wrote:
Hi, I have an embedded system on which i get crash (Caused by memset ) at long run( Reproducible 2/10 times ), I wanted to know efficient ways (materials) to handle memset crashes .
Program terminated with signal 11, Segmentation fault.
#0 memset (dstpp=0xd2, c=<value optimized out>, len=3374) at ../../../src/Common/OS/linux/memset.c:20 20 ../../../src/Common/OS/linux/memset.c: No such file or directory. in ../../../src/Common/OS/linux/memset.c
The problem is probably that memset has been passed either a bad pointer, or a bad size.
From your backtrace, the dstpp of 0xd2 is almost certainly the problem. The first 4K (and sometimes 64K) starting at location zero is invalid. Passing a pointer in that range will cause an page fault (or segmentation fault).
memset doesn't do any parameter checking, so if you want parameter checking you'll need to do that yourself. You could add a function like my_memest and use a macro to map memset to my_memset. Or you could play with LD_PRELOAD (if your runtime library is in a shared library) and intercept the calls that way. http://stackoverflow.com/questions/69859/how-could-i-intercept-linux-sys-cal... http://developers.sun.com/solaris/articles/lib_interposers_code.html http://www.jayconrod.com/cgi/view_post.py?23 Yet another technique is to use the linker's wrap capability http://stackoverflow.com/questions/998464/function-interposition-in-linux-wi... Dave Hylands