Ben Gamari pushed to branch wip/T26053 at Glasgow Haskell Compiler / GHC WARNING: The push did not contain any new commits, but force pushed to delete the commits and changes below. Deleted commits: e8084dcc by Ben Gamari at 2025-07-15T12:59:42-04:00 Debug output - - - - - 1 changed file: - rts/sm/NonMovingMark.c Changes: ===================================== rts/sm/NonMovingMark.c ===================================== @@ -786,18 +786,28 @@ void updateRemembSetPushStack(Capability *cap, StgStack *stack) debugTrace(DEBUG_nonmoving_gc, "upd_rem_set: STACK %p", stack->sp); trace_stack(&cap->upd_rem_set.queue, stack); finish_upd_rem_set_mark((StgClosure *) stack); - return; } else { // The concurrent GC has claimed the right to mark the stack. // Wait until it finishes marking before proceeding with // mutation. - while (needs_upd_rem_set_mark((StgClosure *) stack)) + uint64_t iters = 0; + while (needs_upd_rem_set_mark((StgClosure *) stack)) { + iters++; + if (iters > 100000000) { + bdescr *bd = Bdescr((StgPtr) stack); + debugBelch("updateRemSetPushStack: stuck: %p\n", stack); + debugBelch(" bd->flags: %x\n", bd->flags); + debugBelch(" epoch : %x\n", nonmovingMarkEpoch); + debugBelch(" marking: %x\n", stack->marking); + abort(); + } + #if defined(PARALLEL_GC) busy_wait_nop(); // TODO: Spinning here is unfortunate #else ; #endif - return; + } } } } View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/e8084dcc4cc15591f484b1fc55e8b8cf... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/e8084dcc4cc15591f484b1fc55e8b8cf... You're receiving this email because of your account on gitlab.haskell.org.