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-rw-r--r--erts/emulator/beam/erl_alloc.types3
-rw-r--r--erts/emulator/beam/erl_bif_port.c21
-rw-r--r--erts/emulator/test/port_SUITE.erl57
3 files changed, 74 insertions, 7 deletions
diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types
index 0bbd3e2dd5..6fdede1610 100644
--- a/erts/emulator/beam/erl_alloc.types
+++ b/erts/emulator/beam/erl_alloc.types
@@ -267,7 +267,6 @@ type CODE_IX_LOCK_Q SHORT_LIVED SYSTEM code_ix_lock_q
type PROC_INTERVAL LONG_LIVED SYSTEM process_interval
type BUSY_CALLER_TAB SHORT_LIVED SYSTEM busy_caller_table
type BUSY_CALLER SHORT_LIVED SYSTEM busy_caller
-type PORT_DATA_HEAP STANDARD SYSTEM port_data_heap
+if threads_no_smp
# Need thread safe allocs, but std_alloc and fix_alloc are not;
@@ -361,6 +360,7 @@ type NLINK_SH STANDARD_LOW PROCESSES nlink_sh
type AINFO_REQ STANDARD_LOW SYSTEM alloc_info_request
type SCHED_WTIME_REQ STANDARD_LOW SYSTEM sched_wall_time_request
type GC_INFO_REQ STANDARD_LOW SYSTEM gc_info_request
+type PORT_DATA_HEAP STANDARD_LOW SYSTEM port_data_heap
+else # "fullword"
@@ -379,6 +379,7 @@ type NLINK_SH FIXED_SIZE PROCESSES nlink_sh
type AINFO_REQ SHORT_LIVED SYSTEM alloc_info_request
type SCHED_WTIME_REQ SHORT_LIVED SYSTEM sched_wall_time_request
type GC_INFO_REQ SHORT_LIVED SYSTEM gc_info_request
+type PORT_DATA_HEAP STANDARD SYSTEM port_data_heap
+endif
diff --git a/erts/emulator/beam/erl_bif_port.c b/erts/emulator/beam/erl_bif_port.c
index 3cd53ef65d..ab473c6a08 100644
--- a/erts/emulator/beam/erl_bif_port.c
+++ b/erts/emulator/beam/erl_bif_port.c
@@ -472,7 +472,7 @@ cleanup_old_port_data(erts_aint_t data)
ErtsPortDataHeap *pdhp = (ErtsPortDataHeap *) data;
size_t size;
ERTS_SMP_DATA_DEPENDENCY_READ_MEMORY_BARRIER;
- size = sizeof(ErtsPortDataHeap) + pdhp->hsize*(sizeof(Eterm) - 1);
+ size = sizeof(ErtsPortDataHeap) + (pdhp->hsize-1)*sizeof(Eterm);
erts_schedule_thr_prgr_later_cleanup_op(free_port_data_heap,
(void *) pdhp,
&pdhp->later_op,
@@ -493,8 +493,8 @@ void
erts_cleanup_port_data(Port *prt)
{
ASSERT(erts_atomic32_read_nob(&prt->state) & ERTS_PORT_SFLGS_INVALID_LOOKUP);
- cleanup_old_port_data(erts_smp_atomic_read_nob(&prt->data));
- erts_smp_atomic_set_nob(&prt->data, (erts_aint_t) THE_NON_VALUE);
+ cleanup_old_port_data(erts_smp_atomic_xchg_nob(&prt->data,
+ (erts_aint_t) NULL));
}
Uint
@@ -508,7 +508,7 @@ erts_port_data_size(Port *prt)
}
else {
ErtsPortDataHeap *pdhp = (ErtsPortDataHeap *) data;
- return (Uint) sizeof(ErtsPortDataHeap) + pdhp->hsize*(sizeof(Eterm)-1);
+ return (Uint) sizeof(ErtsPortDataHeap) + (pdhp->hsize-1)*sizeof(Eterm);
}
}
@@ -550,10 +550,11 @@ BIF_RETTYPE port_set_data_2(BIF_ALIST_2)
hsize = size_object(BIF_ARG_2);
pdhp = erts_alloc(ERTS_ALC_T_PORT_DATA_HEAP,
- sizeof(ErtsPortDataHeap) + hsize*(sizeof(Eterm)-1));
+ sizeof(ErtsPortDataHeap) + (hsize-1)*sizeof(Eterm));
hp = &pdhp->heap[0];
pdhp->off_heap.first = NULL;
pdhp->off_heap.overhead = 0;
+ pdhp->hsize = hsize;
pdhp->data = copy_struct(BIF_ARG_2, hsize, &hp, &pdhp->off_heap);
data = (erts_aint_t) pdhp;
ASSERT((data & 0x3) == 0);
@@ -561,8 +562,14 @@ BIF_RETTYPE port_set_data_2(BIF_ALIST_2)
data = erts_smp_atomic_xchg_wb(&prt->data, data);
+ if (data == (erts_aint_t)NULL) {
+ /* Port terminated by racing thread */
+ data = erts_smp_atomic_xchg_wb(&prt->data, data);
+ ASSERT(data != (erts_aint_t)NULL);
+ cleanup_old_port_data(data);
+ BIF_ERROR(BIF_P, BADARG);
+ }
cleanup_old_port_data(data);
-
BIF_RET(am_true);
}
@@ -581,6 +588,8 @@ BIF_RETTYPE port_get_data_1(BIF_ALIST_1)
BIF_ERROR(BIF_P, BADARG);
data = erts_smp_atomic_read_ddrb(&prt->data);
+ if (data == (erts_aint_t)NULL)
+ BIF_ERROR(BIF_P, BADARG); /* Port terminated by racing thread */
if ((data & 0x3) != 0) {
res = (Eterm) (UWord) data;
diff --git a/erts/emulator/test/port_SUITE.erl b/erts/emulator/test/port_SUITE.erl
index fcd4457c34..8c904410b0 100644
--- a/erts/emulator/test/port_SUITE.erl
+++ b/erts/emulator/test/port_SUITE.erl
@@ -90,6 +90,7 @@
mix_up_ports/1, otp_5112/1, otp_5119/1, otp_6224/1,
exit_status_multi_scheduling_block/1, ports/1,
spawn_driver/1, spawn_executable/1, close_deaf_port/1,
+ port_setget_data/1,
unregister_name/1, parallelism_option/1]).
-export([do_iter_max_ports/2]).
@@ -115,6 +116,7 @@ all() ->
mix_up_ports, otp_5112, otp_5119,
exit_status_multi_scheduling_block, ports, spawn_driver,
spawn_executable, close_deaf_port, unregister_name,
+ port_setget_data,
parallelism_option].
groups() ->
@@ -2287,6 +2289,61 @@ close_deaf_port_1(N, Cmd) ->
{comment, "Could not spawn more than " ++ integer_to_list(N) ++ " OS processes."}
end.
+%% Test undocumented port_set_data/2 and port_get_data/1
+%% Hammer from multiple processes a while
+%% and then abrubtly close the port (OTP-12208).
+port_setget_data(Config) when is_list(Config) ->
+ ok = load_driver(?config(data_dir, Config), "echo_drv"),
+ Port = erlang:open_port({spawn_driver, "echo_drv"}, []),
+
+ NSched = erlang:system_info(schedulers_online),
+ HeapData = {1,2,3,<<"A heap binary">>,fun()->"This is fun"end,
+ list_to_binary(lists:seq(1,100))},
+ PRs = lists:map(fun(I) ->
+ spawn_opt(fun() -> port_setget_data_hammer(Port,HeapData,false,1) end,
+ [monitor, {scheduler, I rem NSched}])
+ end,
+ lists:seq(1,10)),
+ receive after 100 -> ok end,
+ Papa = self(),
+ lists:foreach(fun({Pid,_}) -> Pid ! {Papa,prepare_for_close} end, PRs),
+ lists:foreach(fun({Pid,_}) ->
+ receive {Pid,prepare_for_close} -> ok end
+ end,
+ PRs),
+ port_close(Port),
+ lists:foreach(fun({Pid,Ref}) ->
+ receive {'DOWN', Ref, process, Pid, normal} -> ok end
+ end,
+ PRs),
+ ok.
+
+port_setget_data_hammer(Port, HeapData, IsSet0, N) ->
+ Rand = random:uniform(3),
+ IsSet1 = try case Rand of
+ 1 -> true = erlang:port_set_data(Port, atom), true;
+ 2 -> true = erlang:port_set_data(Port, HeapData), true;
+ 3 -> case erlang:port_get_data(Port) of
+ atom -> true;
+ HeapData -> true;
+ undefined -> false=IsSet0
+ end
+ end
+ catch
+ error:badarg ->
+ true = get(prepare_for_close),
+ io:format("~p did ~p rounds before port closed\n", [self(), N]),
+ exit(normal)
+ end,
+ receive {Papa, prepare_for_close} ->
+ put(prepare_for_close, true),
+ Papa ! {self(),prepare_for_close}
+ after 0 ->
+ ok
+ end,
+ port_setget_data_hammer(Port, HeapData, IsSet1, N+1).
+
+
wait_until(Fun) ->
case catch Fun() of
true ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 04:21:04 +0000