From 903651caf320dfdaabd20a0e6f3cd0ffc843e02f Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Fri, 13 Oct 2017 19:16:56 -0400 Subject: VPP-1029: Don't call clib_longjmp(...) directly from the SIGTERM handler It's way too easy to imagine leaving a mutex or a spin-lock held in the /vpe-api shared-memory segment, or elsewhere. Set a volatile variable and check it in a safe place... Change-Id: I9d91c38cffeb921143c272162d055c9c24a6c312 Signed-off-by: Dave Barach --- src/vlib/main.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/vlib/main.h') diff --git a/src/vlib/main.h b/src/vlib/main.h index fb67334e4e2..4288d6f0388 100644 --- a/src/vlib/main.h +++ b/src/vlib/main.h @@ -85,6 +85,8 @@ typedef struct vlib_main_t /* Jump target to exit main loop with given code. */ u32 main_loop_exit_set; + /* Set e.g. in the SIGTERM signal handler, checked in a safe place... */ + volatile u32 main_loop_exit_now; clib_longjmp_t main_loop_exit; #define VLIB_MAIN_LOOP_EXIT_NONE 0 #define VLIB_MAIN_LOOP_EXIT_PANIC 1 @@ -340,6 +342,9 @@ vlib_increment_main_loop_counter (vlib_main_t * vm) vm->main_loop_nodes_processed = 0; vm->vector_counts_per_main_loop[i] = v; vm->node_counts_per_main_loop[i] = n; + + if (PREDICT_FALSE (vm->main_loop_exit_now)) + clib_longjmp (&vm->main_loop_exit, VLIB_MAIN_LOOP_EXIT_CLI); } always_inline void vlib_set_queue_signal_callback -- cgit 1.2.3-korg