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-rw-r--r--erts/doc/src/erl_driver.xml3
-rw-r--r--erts/emulator/beam/erl_alloc.types3
-rw-r--r--erts/emulator/beam/erl_bif_port.c15
-rw-r--r--erts/emulator/test/port_SUITE.erl51
4 files changed, 67 insertions, 5 deletions
diff --git a/erts/doc/src/erl_driver.xml b/erts/doc/src/erl_driver.xml
index 4a1aab75c7..77fc906aca 100644
--- a/erts/doc/src/erl_driver.xml
+++ b/erts/doc/src/erl_driver.xml
@@ -2033,7 +2033,8 @@ ERL_DRV_MAP int sz
entry function is called. If <c>ready_async</c> is null in
the driver entry, the <c>async_free</c> function is called
instead.</p>
- <p>The return value is a handle to the asynchronous task.</p>
+ <p>The return value is -1 if the <c>driver_async</c> call
+ fails.</p>
<note>
<p>As of erts version 5.5.4.3 the default stack size for
threads in the async-thread pool is 16 kilowords,
diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types
index 37354b7f8d..df33bbc2f7 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
type PROC_SYS_TSK SHORT_LIVED PROCESSES proc_sys_task
type PROC_SYS_TSK_QS SHORT_LIVED PROCESSES proc_sys_task_queues
@@ -364,6 +363,7 @@ 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"
@@ -383,6 +383,7 @@ 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 afb33c1cdb..64bd598ba6 100644
--- a/erts/emulator/beam/erl_bif_port.c
+++ b/erts/emulator/beam/erl_bif_port.c
@@ -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
@@ -554,6 +554,7 @@ BIF_RETTYPE port_set_data_2(BIF_ALIST_2)
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 e01b2f253b..8792f25d76 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() ->
@@ -2333,6 +2335,55 @@ 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),
+ PRs = lists:map(fun(I) ->
+ spawn_opt(fun() -> port_setget_data_hammer(Port,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, N) ->
+ Rand = random:uniform(3),
+ try case Rand of
+ 1 -> true = erlang:port_set_data(Port, atom);
+ 2 -> true = erlang:port_set_data(Port, {1,2,3});
+ 3 -> erlang:port_get_data(Port)
+ 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, N+1).
+
+
wait_until(Fun) ->
case catch Fun() of
true ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 12:18:04 +0000