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-rw-r--r--erts/doc/src/notes.xml23
-rw-r--r--erts/emulator/beam/beam_emu.c44
-rw-r--r--erts/emulator/beam/erl_process.c16
-rw-r--r--erts/emulator/test/trace_port_SUITE.erl45
-rw-r--r--erts/emulator/test/trace_port_SUITE_data/echo_drv.c12
-rw-r--r--erts/vsn.mk2
6 files changed, 138 insertions, 4 deletions
diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml
index adc73ceae0..5682b9254c 100644
--- a/erts/doc/src/notes.xml
+++ b/erts/doc/src/notes.xml
@@ -30,6 +30,29 @@
</header>
<p>This document describes the changes made to the ERTS application.</p>
+<section><title>Erts 6.4.1.2</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ A process could end up in an inconsistent half exited
+ state in the runtime system without SMP support. This
+ could occur if the processes was traced by a port that it
+ also was linked to, and the port terminated abnormally
+ while handling a trace message for the process.</p>
+ <p>
+ This bug has always existed in the runtime system without
+ SMP support, but never in the runtime system with SMP
+ support.</p>
+ <p>
+ Own Id: OTP-12889 Aux Id: seq12885 </p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Erts 6.4.1.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index 8bfb7d2ad2..a4e9fe1cba 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -2082,6 +2082,22 @@ void process_main(void)
OpCase(wait_f):
wait2: {
+#ifndef ERTS_SMP
+ if (ERTS_PROC_IS_EXITING(c_p)) {
+ /*
+ * I non smp case:
+ *
+ * Currently executing process might be sent an exit
+ * signal if it is traced by a port that it also is
+ * linked to, and the port terminates during the
+ * trace. In this case we do *not* want to clear
+ * the active flag, which will make the process hang
+ * in limbo forever.
+ */
+ SWAPOUT;
+ goto do_schedule;
+ }
+#endif
c_p->i = (BeamInstr *) Arg(0); /* L1 */
SWAPOUT;
c_p->arity = 0;
@@ -6110,6 +6126,23 @@ erts_hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* re
int arity;
Eterm tmp;
+#ifndef ERTS_SMP
+ if (ERTS_PROC_IS_EXITING(c_p)) {
+ /*
+ * I non smp case:
+ *
+ * Currently executing process might be sent an exit
+ * signal if it is traced by a port that it also is
+ * linked to, and the port terminates during the
+ * trace. In this case we do *not* want to clear
+ * the active flag, which will make the process hang
+ * in limbo forever. Get out of here and terminate
+ * the process...
+ */
+ return -1;
+ }
+#endif
+
if (is_not_atom(module) || is_not_atom(function)) {
/*
* No need to test args here -- done below.
@@ -6186,7 +6219,16 @@ erts_hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* re
ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
PROCESS_MAIN_CHK_LOCKS(c_p);
erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS);
-#ifdef ERTS_SMP
+#ifndef ERTS_SMP
+ if (ERTS_PROC_IS_EXITING(c_p)) {
+ /*
+ * See comment in the begining of the function...
+ *
+ * This second test is needed since gc might be traced.
+ */
+ return -1;
+ }
+#else /* ERTS_SMP */
ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p);
if (!c_p->msg.len)
#endif
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index ea63d20dfa..b6ad8575cf 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -11082,6 +11082,22 @@ set_proc_exiting(Process *p,
cancel_timer(p);
p->i = (BeamInstr *) beam_exit;
+#ifndef ERTS_SMP
+ if (state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS)) {
+ /*
+ * I non smp case:
+ *
+ * Currently executing process might be sent an exit
+ * signal if it is traced by a port that it also is
+ * linked to, and the port terminates during the
+ * trace. In this case we want schedule out the
+ * process as quickly as possible in order to detect
+ * the event as fast as possible.
+ */
+ ERTS_VBUMP_ALL_REDS(p);
+ }
+#endif
+
if (enqueue)
add2runq(enqueue > 0 ? p : make_proxy_proc(NULL, p, enq_prio),
state,
diff --git a/erts/emulator/test/trace_port_SUITE.erl b/erts/emulator/test/trace_port_SUITE.erl
index 99df8da107..67f2441b5b 100644
--- a/erts/emulator/test/trace_port_SUITE.erl
+++ b/erts/emulator/test/trace_port_SUITE.erl
@@ -34,7 +34,8 @@
fake_schedule_after_getting_linked/1,
fake_schedule_after_getting_unlinked/1,
gc/1,
- default_tracer/1]).
+ default_tracer/1,
+ tracer_port_crash/1]).
-include_lib("test_server/include/test_server.hrl").
@@ -44,7 +45,7 @@ test_cases() ->
fake_schedule_after_register,
fake_schedule_after_getting_linked,
fake_schedule_after_getting_unlinked, gc,
- default_tracer].
+ default_tracer, tracer_port_crash].
suite() -> [{ct_hooks,[ts_install_cth]}].
@@ -472,6 +473,42 @@ default_tracer(Config) when is_list(Config) ->
?line M = N,
ok.
+tracer_port_crash(Config) when is_list(Config) ->
+ case test_server:is_native(?MODULE) orelse
+ test_server:is_native(lists) of
+ true ->
+ {skip,"Native code"};
+ false ->
+ Tr = start_tracer(Config),
+ Port = get(tracer_port),
+ Tracee = spawn(fun () ->
+ register(trace_port_linker, self()),
+ link(Port),
+ receive go -> ok end,
+ lists:reverse([1,b,c]),
+ receive die -> ok end
+ end),
+ Tr ! {unlink_tracer_port, self()},
+ receive {unlinked_tracer_port, Tr} -> ok end,
+ port_control(Port, $c, []), %% Make port commands crash tracer port...
+ trace_func({lists,reverse,1}, []),
+ trace_pid(Tracee, true, [call]),
+ trace_info(Tracee, flags),
+ trace_info(self(), tracer),
+ Tracee ! go,
+ receive after 1000 -> ok end,
+ case whereis(trace_port_linker) of
+ undefined ->
+ ok;
+ Id ->
+% erts_debug:set_internal_state(available_internal_state, true),
+% erts_debug:set_internal_state(abort, {trace_port_linker, Id})
+ ?t:fail({trace_port_linker, Id})
+ end,
+ undefined = process_info(Tracee),
+ ok
+ end.
+
%%% Help functions.
huge_data() -> huge_data(16384).
@@ -630,6 +667,10 @@ tracer_loop(RelayTo, Port) ->
{Port,{data,Msg}} ->
RelayTo ! binary_to_term(Msg),
tracer_loop(RelayTo, Port);
+ {unlink_tracer_port, From} ->
+ unlink(Port),
+ From ! {unlinked_tracer_port, self()},
+ tracer_loop(RelayTo, Port);
Other ->
exit({bad_message,Other})
end.
diff --git a/erts/emulator/test/trace_port_SUITE_data/echo_drv.c b/erts/emulator/test/trace_port_SUITE_data/echo_drv.c
index a8d4ede4fe..e40b9193ea 100644
--- a/erts/emulator/test/trace_port_SUITE_data/echo_drv.c
+++ b/erts/emulator/test/trace_port_SUITE_data/echo_drv.c
@@ -1,5 +1,6 @@
#include <stdio.h>
#include "erl_driver.h"
+#include <errno.h>
@@ -14,6 +15,7 @@ enum e_heavy {
typedef struct _erl_drv_data {
ErlDrvPort erlang_port;
enum e_heavy heavy;
+ int crash;
} EchoDrvData;
static EchoDrvData echo_drv_data, *echo_drv_data_p;
@@ -78,6 +80,7 @@ static EchoDrvData *echo_drv_start(ErlDrvPort port, char *command)
echo_drv_data_p = &echo_drv_data;
echo_drv_data_p->erlang_port = port;
echo_drv_data_p->heavy = heavy_off;
+ echo_drv_data_p->crash = 0;
return echo_drv_data_p;
}
@@ -87,6 +90,12 @@ static void echo_drv_stop(EchoDrvData *data_p) {
static void echo_drv_output(ErlDrvData drv_data, char *buf, ErlDrvSizeT len) {
EchoDrvData* data_p = (EchoDrvData *) drv_data;
+
+ if (data_p->crash) {
+ driver_failure_posix(data_p->erlang_port, EINTR);
+ return;
+ }
+
driver_output(data_p->erlang_port, buf, len);
switch (data_p->heavy) {
case heavy_off:
@@ -100,6 +109,7 @@ static void echo_drv_output(ErlDrvData drv_data, char *buf, ErlDrvSizeT len) {
data_p->heavy = heavy_off;
break;
}
+
}
static void echo_drv_finish() {
@@ -115,6 +125,8 @@ static ErlDrvSSizeT echo_drv_control(ErlDrvData drv_data,
case 'h':
data_p->heavy = heavy_set;
break;
+ case 'c':
+ data_p->crash = 1;
}
return 0;
}
diff --git a/erts/vsn.mk b/erts/vsn.mk
index b806cb0b7a..35f40995d5 100644
--- a/erts/vsn.mk
+++ b/erts/vsn.mk
@@ -17,7 +17,7 @@
# %CopyrightEnd%
#
-VSN = 6.4.1.1
+VSN = 6.4.1.2
# Port number 4365 in 4.2
# Port number 4366 in 4.3
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 13:51:36 +0000