Krister Walfridsson’s old blog

I started with NetBSD in the mid-nineties, on a Sun SPARC ELC with 32Mbyte of memory, where I used GCC and Emacs on X11 with FVWM as the wi...

There was some concern that type-based alias analysis could cause problems when it was implemented in GCC, but the conclusion (as expressed...

My previous blog post " C pointers are not hardware pointers " says that dangling pointers may invoke undefined behavior even if ...

Volatile in C The main use case for volatile in C is memory mapped hardware where reads and writes may change the hardware state (even r...

The C standard has more restrictions on pointers than what was discussed in the previous blog post . This post covers pointer casts. Po...

Pointers in the C language are more abstract than pointers in the hardware, and the compiler may surprise developers that think that pointe...

Signed integers are not allowed to overflow in C and C++, and this helps compilers generate better code. I was interested in how GCC is tak...

My twitter feed was full of “ printf is Turing-complete” tweets after the 32c3 talk " New memory corruption attacks: why can't we...