|  | @@ -217,9 +217,10 @@ struct grpc_pollset {
 | 
	
		
			
				|  |  |  struct grpc_pollset_vtable {
 | 
	
		
			
				|  |  |    void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  |                   struct grpc_fd *fd, int and_unlock_pollset);
 | 
	
		
			
				|  |  | -  void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  | -                                grpc_pollset_worker *worker,
 | 
	
		
			
				|  |  | -                                gpr_timespec deadline, gpr_timespec now);
 | 
	
		
			
				|  |  | +  grpc_error *(*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | +                                       grpc_pollset *pollset,
 | 
	
		
			
				|  |  | +                                       grpc_pollset_worker *worker,
 | 
	
		
			
				|  |  | +                                       gpr_timespec deadline, gpr_timespec now);
 | 
	
		
			
				|  |  |    void (*finish_shutdown)(grpc_pollset *pollset);
 | 
	
		
			
				|  |  |    void (*destroy)(grpc_pollset *pollset);
 | 
	
		
			
				|  |  |  };
 | 
	
	
		
			
				|  | @@ -247,9 +248,9 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
 | 
	
		
			
				|  |  |  #define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
 | 
	
		
			
				|  |  |  /* As per pollset_kick, with an extended set of flags (defined above)
 | 
	
		
			
				|  |  |     -- mostly for fd_posix's use. */
 | 
	
		
			
				|  |  | -static void pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  | -                             grpc_pollset_worker *specific_worker,
 | 
	
		
			
				|  |  | -                             uint32_t flags);
 | 
	
		
			
				|  |  | +static grpc_error *pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  | +                                    grpc_pollset_worker *specific_worker,
 | 
	
		
			
				|  |  | +                                    uint32_t flags) GRPC_MUST_USE_RESULT;
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  /* turn a pollset into a multipoller: platform specific */
 | 
	
		
			
				|  |  |  typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
 | 
	
	
		
			
				|  | @@ -415,12 +416,13 @@ static bool fd_is_orphaned(grpc_fd *fd) {
 | 
	
		
			
				|  |  |    return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void pollset_kick_locked(grpc_fd_watcher *watcher) {
 | 
	
		
			
				|  |  | +static grpc_error *pollset_kick_locked(grpc_fd_watcher *watcher) {
 | 
	
		
			
				|  |  |    gpr_mu_lock(&watcher->pollset->mu);
 | 
	
		
			
				|  |  |    GPR_ASSERT(watcher->worker);
 | 
	
		
			
				|  |  | -  pollset_kick_ext(watcher->pollset, watcher->worker,
 | 
	
		
			
				|  |  | -                   GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
 | 
	
		
			
				|  |  | +  grpc_error *err = pollset_kick_ext(watcher->pollset, watcher->worker,
 | 
	
		
			
				|  |  | +                                     GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
 | 
	
		
			
				|  |  |    gpr_mu_unlock(&watcher->pollset->mu);
 | 
	
		
			
				|  |  | +  return err;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
 | 
	
	
		
			
				|  | @@ -726,10 +728,19 @@ static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
 | 
	
		
			
				|  |  |    worker->prev->next = worker->next->prev = worker;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  | -                             grpc_pollset_worker *specific_worker,
 | 
	
		
			
				|  |  | -                             uint32_t flags) {
 | 
	
		
			
				|  |  | +static void kick_append_error(grpc_error **composite, grpc_error *error) {
 | 
	
		
			
				|  |  | +  if (error == GRPC_ERROR_NONE) return;
 | 
	
		
			
				|  |  | +  if (*composite == GRPC_ERROR_NONE) {
 | 
	
		
			
				|  |  | +    *composite = GRPC_ERROR_CREATE("Kick Failure");
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  *composite = grpc_error_add_child(*composite, error);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static grpc_error *pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  | +                                    grpc_pollset_worker *specific_worker,
 | 
	
		
			
				|  |  | +                                    uint32_t flags) {
 | 
	
		
			
				|  |  |    GPR_TIMER_BEGIN("pollset_kick_ext", 0);
 | 
	
		
			
				|  |  | +  grpc_error *error = GRPC_ERROR_NONE;
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |    /* pollset->mu already held */
 | 
	
		
			
				|  |  |    if (specific_worker != NULL) {
 | 
	
	
		
			
				|  | @@ -739,7 +750,8 @@ static void pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  |        for (specific_worker = p->root_worker.next;
 | 
	
		
			
				|  |  |             specific_worker != &p->root_worker;
 | 
	
		
			
				|  |  |             specific_worker = specific_worker->next) {
 | 
	
		
			
				|  |  | -        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
 | 
	
		
			
				|  |  | +        kick_append_error(
 | 
	
		
			
				|  |  | +            &error, grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
 | 
	
		
			
				|  |  |        }
 | 
	
		
			
				|  |  |        p->kicked_without_pollers = 1;
 | 
	
		
			
				|  |  |        GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
 | 
	
	
		
			
				|  | @@ -750,14 +762,16 @@ static void pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  |          specific_worker->reevaluate_polling_on_wakeup = 1;
 | 
	
		
			
				|  |  |        }
 | 
	
		
			
				|  |  |        specific_worker->kicked_specifically = 1;
 | 
	
		
			
				|  |  | -      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
 | 
	
		
			
				|  |  | +      kick_append_error(&error,
 | 
	
		
			
				|  |  | +                        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
 | 
	
		
			
				|  |  |      } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
 | 
	
		
			
				|  |  |        GPR_TIMER_MARK("kick_yoself", 0);
 | 
	
		
			
				|  |  |        if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
 | 
	
		
			
				|  |  |          specific_worker->reevaluate_polling_on_wakeup = 1;
 | 
	
		
			
				|  |  |        }
 | 
	
		
			
				|  |  |        specific_worker->kicked_specifically = 1;
 | 
	
		
			
				|  |  | -      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
 | 
	
		
			
				|  |  | +      kick_append_error(&error,
 | 
	
		
			
				|  |  | +                        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |    } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
 | 
	
		
			
				|  |  |      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
 | 
	
	
		
			
				|  | @@ -778,7 +792,8 @@ static void pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  |        if (specific_worker != NULL) {
 | 
	
		
			
				|  |  |          GPR_TIMER_MARK("finally_kick", 0);
 | 
	
		
			
				|  |  |          push_back_worker(p, specific_worker);
 | 
	
		
			
				|  |  | -        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
 | 
	
		
			
				|  |  | +        kick_append_error(
 | 
	
		
			
				|  |  | +            &error, grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
 | 
	
		
			
				|  |  |        }
 | 
	
		
			
				|  |  |      } else {
 | 
	
		
			
				|  |  |        GPR_TIMER_MARK("kicked_no_pollers", 0);
 | 
	
	
		
			
				|  | @@ -787,20 +802,21 @@ static void pollset_kick_ext(grpc_pollset *p,
 | 
	
		
			
				|  |  |    }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |    GPR_TIMER_END("pollset_kick_ext", 0);
 | 
	
		
			
				|  |  | +  return error;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void pollset_kick(grpc_pollset *p,
 | 
	
		
			
				|  |  | -                         grpc_pollset_worker *specific_worker) {
 | 
	
		
			
				|  |  | -  pollset_kick_ext(p, specific_worker, 0);
 | 
	
		
			
				|  |  | +static grpc_error *pollset_kick(grpc_pollset *p,
 | 
	
		
			
				|  |  | +                                grpc_pollset_worker *specific_worker) {
 | 
	
		
			
				|  |  | +  return pollset_kick_ext(p, specific_worker, 0);
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  /* global state management */
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void pollset_global_init(void) {
 | 
	
		
			
				|  |  | +static grpc_error *pollset_global_init(void) {
 | 
	
		
			
				|  |  |    gpr_tls_init(&g_current_thread_poller);
 | 
	
		
			
				|  |  |    gpr_tls_init(&g_current_thread_worker);
 | 
	
		
			
				|  |  |    grpc_wakeup_fd_global_init();
 | 
	
		
			
				|  |  | -  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
 | 
	
		
			
				|  |  | +  return grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  static void pollset_global_shutdown(void) {
 | 
	
	
		
			
				|  | @@ -810,7 +826,9 @@ static void pollset_global_shutdown(void) {
 | 
	
		
			
				|  |  |    grpc_wakeup_fd_global_destroy();
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
 | 
	
		
			
				|  |  | +static grpc_error *kick_poller(void) {
 | 
	
		
			
				|  |  | +  return grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  /* main interface */
 | 
	
		
			
				|  |  |  
 | 
	
	
		
			
				|  | @@ -876,11 +894,12 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
 | 
	
		
			
				|  |  |    grpc_exec_ctx_push(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE, NULL);
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  | -                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
 | 
	
		
			
				|  |  | -                         gpr_timespec deadline) {
 | 
	
		
			
				|  |  | +static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  | +                                grpc_pollset_worker **worker_hdl,
 | 
	
		
			
				|  |  | +                                gpr_timespec now, gpr_timespec deadline) {
 | 
	
		
			
				|  |  |    grpc_pollset_worker worker;
 | 
	
		
			
				|  |  |    *worker_hdl = &worker;
 | 
	
		
			
				|  |  | +  grpc_error *error = GRPC_ERROR_NONE;
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |    /* pollset->mu already held */
 | 
	
		
			
				|  |  |    int added_worker = 0;
 | 
	
	
		
			
				|  | @@ -896,7 +915,10 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  |      pollset->local_wakeup_cache = worker.wakeup_fd->next;
 | 
	
		
			
				|  |  |    } else {
 | 
	
		
			
				|  |  |      worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
 | 
	
		
			
				|  |  | -    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
 | 
	
		
			
				|  |  | +    error = grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
 | 
	
		
			
				|  |  | +    if (error != GRPC_ERROR_NONE) {
 | 
	
		
			
				|  |  | +      return error;
 | 
	
		
			
				|  |  | +    }
 | 
	
		
			
				|  |  |    }
 | 
	
		
			
				|  |  |    worker.kicked_specifically = 0;
 | 
	
		
			
				|  |  |    /* If there's work waiting for the pollset to be idle, and the
 | 
	
	
		
			
				|  | @@ -933,8 +955,8 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  |        }
 | 
	
		
			
				|  |  |        gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
 | 
	
		
			
				|  |  |        GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
 | 
	
		
			
				|  |  | -      pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
 | 
	
		
			
				|  |  | -                                             deadline, now);
 | 
	
		
			
				|  |  | +      error = pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
 | 
	
		
			
				|  |  | +                                                     deadline, now);
 | 
	
		
			
				|  |  |        GPR_TIMER_END("maybe_work_and_unlock", 0);
 | 
	
		
			
				|  |  |        locked = 0;
 | 
	
		
			
				|  |  |        gpr_tls_set(&g_current_thread_poller, 0);
 | 
	
	
		
			
				|  | @@ -955,7 +977,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  |      /* If we're forced to re-evaluate polling (via pollset_kick with
 | 
	
		
			
				|  |  |         GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
 | 
	
		
			
				|  |  |         a loop */
 | 
	
		
			
				|  |  | -    if (worker.reevaluate_polling_on_wakeup) {
 | 
	
		
			
				|  |  | +    if (worker.reevaluate_polling_on_wakeup && error == GRPC_ERROR_NONE) {
 | 
	
		
			
				|  |  |        worker.reevaluate_polling_on_wakeup = 0;
 | 
	
		
			
				|  |  |        pollset->kicked_without_pollers = 0;
 | 
	
		
			
				|  |  |        if (queued_work || worker.kicked_specifically) {
 | 
	
	
		
			
				|  | @@ -996,6 +1018,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
		
			
				|  |  |    }
 | 
	
		
			
				|  |  |    *worker_hdl = NULL;
 | 
	
		
			
				|  |  |    GPR_TIMER_END("pollset_work", 0);
 | 
	
		
			
				|  |  | +  return error;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 | 
	
	
		
			
				|  | @@ -1156,11 +1179,19 @@ exit:
 | 
	
		
			
				|  |  |    }
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  | -                                                grpc_pollset *pollset,
 | 
	
		
			
				|  |  | -                                                grpc_pollset_worker *worker,
 | 
	
		
			
				|  |  | -                                                gpr_timespec deadline,
 | 
	
		
			
				|  |  | -                                                gpr_timespec now) {
 | 
	
		
			
				|  |  | +static void work_combine_error(grpc_error **composite, grpc_error *error) {
 | 
	
		
			
				|  |  | +  if (error == GRPC_ERROR_NONE) return;
 | 
	
		
			
				|  |  | +  if (*composite == GRPC_ERROR_NONE) {
 | 
	
		
			
				|  |  | +    *composite = GRPC_ERROR_CREATE("pollset_work");
 | 
	
		
			
				|  |  | +  }
 | 
	
		
			
				|  |  | +  *composite = grpc_error_add_child(*composite, error);
 | 
	
		
			
				|  |  | +}
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +static grpc_error *basic_pollset_maybe_work_and_unlock(
 | 
	
		
			
				|  |  | +    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
 | 
	
		
			
				|  |  | +    gpr_timespec deadline, gpr_timespec now) {
 | 
	
		
			
				|  |  | +  grpc_error *error = GRPC_ERROR_NONE;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  |  #define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
 | 
	
		
			
				|  |  |  #define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
 | 
	
		
			
				|  |  |  
 | 
	
	
		
			
				|  | @@ -1210,7 +1241,7 @@ static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |    if (r < 0) {
 | 
	
		
			
				|  |  |      if (errno != EINTR) {
 | 
	
		
			
				|  |  | -      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
 | 
	
		
			
				|  |  | +      work_combine_error(&error, GRPC_OS_ERROR(errno, "poll"));
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |      if (fd) {
 | 
	
		
			
				|  |  |        fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
 | 
	
	
		
			
				|  | @@ -1221,10 +1252,12 @@ static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |    } else {
 | 
	
		
			
				|  |  |      if (pfd[0].revents & POLLIN_CHECK) {
 | 
	
		
			
				|  |  | -      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
 | 
	
		
			
				|  |  | +      work_combine_error(&error,
 | 
	
		
			
				|  |  | +                         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |      if (pfd[1].revents & POLLIN_CHECK) {
 | 
	
		
			
				|  |  | -      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
 | 
	
		
			
				|  |  | +      work_combine_error(&error,
 | 
	
		
			
				|  |  | +                         grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd));
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |      if (nfds > 2) {
 | 
	
		
			
				|  |  |        fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
 | 
	
	
		
			
				|  | @@ -1237,6 +1270,8 @@ static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
 | 
	
		
			
				|  |  |    if (fd) {
 | 
	
		
			
				|  |  |      GRPC_FD_UNREF(fd, "basicpoll_begin");
 | 
	
		
			
				|  |  |    }
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +  return error;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  static void basic_pollset_destroy(grpc_pollset *pollset) {
 | 
	
	
		
			
				|  | @@ -1297,9 +1332,11 @@ exit:
 | 
	
		
			
				|  |  |    }
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  | -static void multipoll_with_poll_pollset_maybe_work_and_unlock(
 | 
	
		
			
				|  |  | +static grpc_error *multipoll_with_poll_pollset_maybe_work_and_unlock(
 | 
	
		
			
				|  |  |      grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
 | 
	
		
			
				|  |  |      gpr_timespec deadline, gpr_timespec now) {
 | 
	
		
			
				|  |  | +  grpc_error *error = GRPC_ERROR_NONE;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  |  #define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
 | 
	
		
			
				|  |  |  #define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
 | 
	
		
			
				|  |  |  
 | 
	
	
		
			
				|  | @@ -1374,10 +1411,12 @@ static void multipoll_with_poll_pollset_maybe_work_and_unlock(
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |    } else {
 | 
	
		
			
				|  |  |      if (pfds[0].revents & POLLIN_CHECK) {
 | 
	
		
			
				|  |  | -      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
 | 
	
		
			
				|  |  | +      work_combine_error(&error,
 | 
	
		
			
				|  |  | +                         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |      if (pfds[1].revents & POLLIN_CHECK) {
 | 
	
		
			
				|  |  | -      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
 | 
	
		
			
				|  |  | +      work_combine_error(&error,
 | 
	
		
			
				|  |  | +                         grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd));
 | 
	
		
			
				|  |  |      }
 | 
	
		
			
				|  |  |      for (i = 2; i < pfd_count; i++) {
 | 
	
		
			
				|  |  |        if (watchers[i].fd == NULL) {
 | 
	
	
		
			
				|  | @@ -1391,6 +1430,7 @@ static void multipoll_with_poll_pollset_maybe_work_and_unlock(
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |    gpr_free(pfds);
 | 
	
		
			
				|  |  |    gpr_free(watchers);
 | 
	
		
			
				|  |  | +  return error;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  static void multipoll_with_poll_pollset_finish_shutdown(grpc_pollset *pollset) {
 | 
	
	
		
			
				|  | @@ -1934,14 +1974,23 @@ static const grpc_event_engine_vtable vtable = {
 | 
	
		
			
				|  |  |  };
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  const grpc_event_engine_vtable *grpc_init_poll_and_epoll_posix(void) {
 | 
	
		
			
				|  |  | +  const char *msg;
 | 
	
		
			
				|  |  | +  grpc_error *err = GRPC_ERROR_NONE;
 | 
	
		
			
				|  |  |  #ifdef GPR_LINUX_MULTIPOLL_WITH_EPOLL
 | 
	
		
			
				|  |  |    platform_become_multipoller = epoll_become_multipoller;
 | 
	
		
			
				|  |  |  #else
 | 
	
		
			
				|  |  |    platform_become_multipoller = poll_become_multipoller;
 | 
	
		
			
				|  |  |  #endif
 | 
	
		
			
				|  |  |    fd_global_init();
 | 
	
		
			
				|  |  | -  pollset_global_init();
 | 
	
		
			
				|  |  | +  err = pollset_global_init();
 | 
	
		
			
				|  |  | +  if (err != GRPC_ERROR_NONE) goto error;
 | 
	
		
			
				|  |  |    return &vtable;
 | 
	
		
			
				|  |  | +
 | 
	
		
			
				|  |  | +error:
 | 
	
		
			
				|  |  | +  msg = grpc_error_string(err);
 | 
	
		
			
				|  |  | +  gpr_log(GPR_ERROR, "%s", msg);
 | 
	
		
			
				|  |  | +  grpc_error_free_string(msg);
 | 
	
		
			
				|  |  | +  return NULL;
 | 
	
		
			
				|  |  |  }
 | 
	
		
			
				|  |  |  
 | 
	
		
			
				|  |  |  #endif
 |