On Oct 1, 2013, at 1:16 PM, Maxim Fomin <ma...@maxim-fomin.ru> wrote: > > Druntime can catch SIGINT and throw the exception. This means that D runtime > can be easily broken by silly C code which uses its own signal handlers. I > didn't tested, but believe this is already the case with respect to SIGUSR1 > and SIGUSR2 which are used by druntime, so any simple code hijacking the > signals can break runtime. Linux signals handlers as error mechanism is a > complete disaster.
Unix signal handlers in general are a complete disaster. The core idea is good, but the Posix requirements surrounding them are so loose as to render them nearly unusable. I wasn't aware of pthread_suspend and it appears to be quite new. Does anyone know if it's implemented in Linux yet? A StackThreads discussion I found from a few years ago said it isn't, but a lot can change in a few years. I would absolutely love to do away with using signals for coordinating garbage collection wherever possible.
