* Rich Felker: > On Fri, Nov 23, 2018 at 06:39:04PM +0100, Florian Weimer wrote: >> * Rich Felker: >> >> > On Fri, Nov 23, 2018 at 12:05:20PM -0500, Mathieu Desnoyers wrote: >> >> There has been presumptions about signals being blocked when the thread >> >> exits throughout this email thread. Out of curiosity, what code is >> >> responsible for disabling signals in this situation ? Related to this, >> >> is it valid to access a IE model TLS variable from a signal handler at >> >> _any_ point where the signal handler nests over thread's execution ? >> >> This includes early start and just before invoking the exit system call. >> > >> > It should be valid to access *any* TLS object like this, but the >> > standards don't cover it well. >> >> C++ makes it undefined: >> >> <http://eel.is/c++draft/support.signal#def:evaluation,signal-safe> > > C also leaves access to pretty much anything from a signal handler > undefined, but that makes signals basically useless. Access to atomic variables of thread storage duration is defined, though. Thanks, Florian
