Last week, I wrote three blogs about the situation with starting child processes on Unix and being notified of their exit. I raised several problems with the current implementation, which I have tried to solve and I have now a proposal for. If you haven’t yet, you should take some time to read the previous …
Category Archive: Linux
Feb 22
The value of passing by value
I’ve written in the past about how passing certain types by value in C++ would be more efficient than passing by constant reference. But it turns out that the ABI rules are somewhat more complex than what I said back in 2008. Time to investigate. This is also prompted by the discussion on qreal on …
Jan 19
Update and benchmark on the dynamic library proposals
My last blog on the dynamic libraries on Linux attracted over 15000 visits, which was quite unexpected (it’s 15x more than the usual traffic). It got linked from reddit and ycombinator and comments there and in the previous post have raised some interesting questions I’ll try to answer. LD_PRELOAD First, a quck background: LD_PRELOAD and …
Jan 16
Sorry state of dynamic libraries on Linux
Last week, we identified a bug in Qt with Olivier‘s new signal-slot syntax. Upon further investigation, it turns out it’s not a Qt issue, but an ABI one. Which prompted me to investigate more and decide that dynamic libraries need a big overhaul on Linux. tl;dr (a.k.a. Executive Summary) Shared libraries on Linux are linked …