Recently I ran into this problem. How do you capture SIGSEGV with a signal handler and still generate a core file? The problem is that once you have your own signal handler for SIGSEGV, Linux will not call default signal handler which generates the core file. So, once you got SIGSEGV, consider all that useful [...]

Continuing my previous post, I would like to talk about relatively new feature in glibc and pthreads in particular. I am talking about spinlocks.

Recently I ran into few pieces of code here and there that assumed that int is an atomic type. I.e. when you modify value of the variable from two or more different threads at the same time, all of the changes you’ve made to the value will remain intact. But really, can you modify variables [...]

I mentioned this several times in my articles and included a link to wikipedia’s definition of CIDR notation. However only now I saw how complex the wiki’s definition is. From the other hand, I guess any formal definition of the subject would be complex and hard to understand. So I took the liberty to describe [...]

From some reason this topic never got enough attention in libc. POSIX threads library does addresses this issue, however what starts in POSIX library stays in POSIX library. pthread_self() and friends will get you an identifier that is unique accross your program, but not accross your system. Although thread is a system object, the system [...]