From b368fb879676fa6dd2d251ba6583d0a86d04aeb0 Mon Sep 17 00:00:00 2001 From: Lukas Larsson Date: Tue, 27 Aug 2013 12:24:30 +0200 Subject: erts: Fix segfault when scheduling release_port later_op begin_port_cleanup can be called from a non-scheduler thread, this means that there is no esdp available and thus erts_schedule_thr_prgr_later_op segfaults. --- erts/emulator/beam/erl_port_task.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/erts/emulator/beam/erl_port_task.c b/erts/emulator/beam/erl_port_task.c index 7d53ce7152..547a42beb2 100644 --- a/erts/emulator/beam/erl_port_task.c +++ b/erts/emulator/beam/erl_port_task.c @@ -1838,6 +1838,16 @@ release_port(void *vport) { erts_port_dec_refc((Port *) vport); } + +static void +schedule_release_port(void *vport) { + Port *pp = (Port*)vport; + /* This is only used when a port release was ordered from a non-scheduler */ + erts_schedule_thr_prgr_later_op(release_port, + (void *) pp, + &pp->common.u.release); +} + #endif static void @@ -2033,10 +2043,15 @@ begin_port_cleanup(Port *pp, ErtsPortTask **execqp, int *processing_busy_q_p) * Schedule cleanup of port structure... */ #ifdef ERTS_SMP - /* Has to be more or less immediate to release any driver */ - erts_schedule_thr_prgr_later_op(release_port, - (void *) pp, - &pp->common.u.release); + /* We might not be a scheduler, eg. traceing to port we are sys_msg_dispatcher */ + if (!erts_get_scheduler_data()) { + erts_schedule_misc_aux_work(1, schedule_release_port, (void*)pp); + } else { + /* Has to be more or less immediate to release any driver */ + erts_schedule_thr_prgr_later_op(release_port, + (void *) pp, + &pp->common.u.release); + } #else pp->cleanup = 1; #endif -- cgit v1.2.3