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authorErlang/OTP <[email protected]>2019-01-24 09:03:08 +0100
committerErlang/OTP <[email protected]>2019-01-24 09:03:08 +0100
commit62c915fca28bd521c740340f678a85df76765045 (patch)
tree3fd3f47e9ebb5cb994869d952bdf846484c0bf66
parent3f4b17036bb6dbd302da3c38830512439b146e34 (diff)
parent51fdf17ef9703692b1de4cec67cc64e84ba1accc (diff)
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Merge branch 'lukas/erts/fix_inet_multitimer_cleanup/OTP-15536' into maint-21
* lukas/erts/fix_inet_multitimer_cleanup/OTP-15536: erts: Fix cleanup of the inet MultiTimer
-rw-r--r--erts/emulator/drivers/common/inet_drv.c40
-rw-r--r--lib/kernel/test/gen_tcp_misc_SUITE.erl33
2 files changed, 52 insertions, 21 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 47eb5df7dd..31c9ce2d0b 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -12956,38 +12956,40 @@ make_noninheritable_handle(SOCKET s)
static void fire_multi_timers(tcp_descriptor *desc, ErlDrvPort port,
ErlDrvData data)
{
- ErlDrvTime next_timeout;
- MultiTimerData *curr = desc->mtd;
- if (!curr) {
- ASSERT(0);
- return;
+ ErlDrvTime next_timeout = 0;
+ if (!desc->mtd) {
+ ASSERT(0);
+ return;
}
#ifdef DEBUG
{
ErlDrvTime chk = erl_drv_monotonic_time(ERL_DRV_MSEC);
- ASSERT(chk >= curr->when);
+ ASSERT(chk >= desc->mtd->when);
}
#endif
do {
- MultiTimerData *save = curr;
+ MultiTimerData save = *desc->mtd;
- (*(save->timeout_function))(data,save->caller);
+ /* We first remove the timer so that the timeout_functions has
+ can call clean_multi_timers without breaking anything */
+ if (desc->mtd_cache == NULL) {
+ desc->mtd_cache = desc->mtd;
+ } else {
+ FREE(desc->mtd);
+ }
- curr = curr->next;
+ desc->mtd = save.next;
+ if (desc->mtd != NULL)
+ desc->mtd->prev = NULL;
- if (desc->mtd_cache == NULL)
- desc->mtd_cache = save;
- else
- FREE(save);
+ (*(save.timeout_function))(data,save.caller);
- if (curr == NULL) {
- desc->mtd = NULL;
+ if (desc->mtd == NULL)
return;
- }
- curr->prev = NULL;
- next_timeout = curr->when - erl_drv_monotonic_time(ERL_DRV_MSEC);
+
+ next_timeout = desc->mtd->when - erl_drv_monotonic_time(ERL_DRV_MSEC);
} while (next_timeout <= 0);
- desc->mtd = curr;
+
driver_set_timer(port, (unsigned long) next_timeout);
}
diff --git a/lib/kernel/test/gen_tcp_misc_SUITE.erl b/lib/kernel/test/gen_tcp_misc_SUITE.erl
index 244bd7e2a0..52edfaee29 100644
--- a/lib/kernel/test/gen_tcp_misc_SUITE.erl
+++ b/lib/kernel/test/gen_tcp_misc_SUITE.erl
@@ -53,7 +53,7 @@
active_once_closed/1, send_timeout/1, send_timeout_active/1,
otp_7731/1, zombie_sockets/1, otp_7816/1, otp_8102/1,
wrapping_oct/0, wrapping_oct/1, otp_9389/1, otp_13939/1,
- otp_12242/1]).
+ otp_12242/1, delay_send_error/1]).
%% Internal exports.
-export([sender/3, not_owner/1, passive_sockets_server/2, priority_server/1,
@@ -97,7 +97,7 @@ all() ->
active_once_closed, send_timeout, send_timeout_active, otp_7731,
wrapping_oct,
zombie_sockets, otp_7816, otp_8102, otp_9389,
- otp_12242].
+ otp_12242, delay_send_error].
groups() ->
[].
@@ -3427,3 +3427,32 @@ otp_12242(Addr) when tuple_size(Addr) =:= 4 ->
wait(Mref) ->
receive {'DOWN',Mref,_,_,Reason} -> Reason end.
+
+%% OTP-15536
+%% Test that send error works correctly for delay_send
+delay_send_error(Config) ->
+ {ok, LS} = gen_tcp:listen(0, [{reuseaddr, true}, {packet, 1}, {active, false}]),
+ {ok,{{0,0,0,0},PortNum}}=inet:sockname(LS),
+ P = spawn_link(
+ fun() ->
+ {ok, S} = gen_tcp:accept(LS),
+ receive die -> gen_tcp:close(S) end
+ end),
+ erlang:monitor(process, P),
+ {ok, S} = gen_tcp:connect("localhost", PortNum,
+ [{packet, 1}, {active, false}, {delay_send, true}]),
+
+ %% Do a couple of sends first to see that it works
+ ok = gen_tcp:send(S, "hello"),
+ ok = gen_tcp:send(S, "hello"),
+ ok = gen_tcp:send(S, "hello"),
+
+ %% Make the receiver close
+ P ! die,
+ receive _Down -> ok end,
+
+ ok = gen_tcp:send(S, "hello"),
+ timer:sleep(500), %% Sleep in order for delay_send to have time to trigger
+
+ %% This used to result in a double free
+ {error, closed} = gen_tcp:send(S, "hello").