* Rich Felker: > This is ambiguously worded (does "operating system" mean kernel?) and > does not agree with POSIX, which defines it as: > > Minimum stack size for a signal handler. > > And otherwise just specifies that sigaltstack shall fail if given a > smaller size. > > The POSIX definition is also underspecified but it's clear that it > should be possible to execute at least a do-nothing signal handler > (like one which immediately returns and whose sole purpose is to > induce EINTR when intalled without SA_RESTART), or even a minimal one > that does something like storing to a global variable, with such a > small stack. Allowing a size where even a do-nothing signal handler > results in a memory-clobbering overflow or access fault seems > non-conforming to me. POSIX does not specify what happens on a stack overflow (or more generally, if most resource limits are exceeded), so I think the behavior is conforming on a technicality. Thanks, Florian
