https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119112
--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Iain Buclaw <ibuc...@gcc.gnu.org>: https://gcc.gnu.org/g:ca0ea3d4192313ad00da4ff734baffcecafe0b1f commit r14-11399-gca0ea3d4192313ad00da4ff734baffcecafe0b1f Author: Iain Buclaw <ibuc...@gdcproject.org> Date: Mon Mar 10 20:52:49 2025 +0100 libphobos: Default to libc closefrom in spawnProcessPosix [PR119112] This is a backport of two changes in upstream Phobos. - The current implementation of spawnProcessPosix is broken on systems with a large `ulimit -n' because it always OOMs making it impossible to spawn processes. Using the libc implementation, when available, for doing file descriptor operations en-mass solves this problem. - The fallback code now reads the list of file descriptors in use from /dev/fd or /proc/this/fd, avoiding the need to scroll through the entire list of possible file descriptors. This fixes the fork process being very slow and memory intensive when RLIMIT_NOFILE is too high. PR d/119112 libphobos/ChangeLog: * libdruntime/core/sys/freebsd/unistd.d (closefrom): Add binding. * libdruntime/core/sys/linux/unistd.d (closefrom): Likewise. * libdruntime/core/sys/openbsd/unistd.d (closefrom): Likewise. * src/std/process.d (enum InternalError): Add closefds_dup2. (spawnProcessPosix): Use closefrom when available. Reviewed-on: https://github.com/dlang/phobos/pull/9048 Reviewed-on: https://github.com/dlang/phobos/pull/9077
