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-rw-r--r--erts/emulator/test/trace_SUITE.erl69
-rw-r--r--erts/emulator/test/trace_SUITE_data/Makefile.src5
-rw-r--r--erts/emulator/test/trace_SUITE_data/slow_drv.c205
3 files changed, 279 insertions, 0 deletions
diff --git a/erts/emulator/test/trace_SUITE.erl b/erts/emulator/test/trace_SUITE.erl
index 221b65309a..caa58ae281 100644
--- a/erts/emulator/test/trace_SUITE.erl
+++ b/erts/emulator/test/trace_SUITE.erl
@@ -34,6 +34,7 @@
system_monitor_args/1, more_system_monitor_args/1,
system_monitor_long_gc_1/1, system_monitor_long_gc_2/1,
system_monitor_large_heap_1/1, system_monitor_large_heap_2/1,
+ system_monitor_long_schedule/1,
bad_flag/1, trace_delivered/1]).
-include_lib("test_server/include/test_server.hrl").
@@ -52,6 +53,7 @@ all() ->
set_on_first_spawn, system_monitor_args,
more_system_monitor_args, system_monitor_long_gc_1,
system_monitor_long_gc_2, system_monitor_large_heap_1,
+ system_monitor_long_schedule,
system_monitor_large_heap_2, bad_flag, trace_delivered].
groups() ->
@@ -508,6 +510,65 @@ try_l(Val) ->
?line {Self,Comb1} = erlang:system_monitor(undefined),
?line [{large_heap,Val},{long_gc,Arbitrary2}] = lists:sort(Comb1).
+monitor_sys(Parent) ->
+ receive
+ {monitor,Pid,long_schedule,Data} when is_pid(Pid) ->
+ io:format("Long schedule of ~w: ~w~n",[Pid,Data]),
+ Parent ! {Pid,Data},
+ monitor_sys(Parent);
+ {monitor,Port,long_schedule,Data} when is_port(Port) ->
+ {name,Name} = erlang:port_info(Port,name),
+ io:format("Long schedule of ~w (~p): ~w~n",[Port,Name,Data]),
+ Parent ! {Port,Data},
+ monitor_sys(Parent);
+ Other ->
+ erlang:display(Other)
+ end.
+
+start_monitor() ->
+ Parent = self(),
+ Mpid = spawn_link(fun() -> monitor_sys(Parent) end),
+ erlang:system_monitor(Mpid,[{long_schedule,100}]),
+ erlang:yield(), % Need to be rescheduled for the trace to take
+ ok.
+
+system_monitor_long_schedule(suite) ->
+ [];
+system_monitor_long_schedule(doc) ->
+ ["Tests erlang:system_monitor(Pid, [{long_schedule,Time}])"];
+system_monitor_long_schedule(Config) when is_list(Config) ->
+ Path = ?config(data_dir, Config),
+ erl_ddll:start(),
+ case (catch load_driver(Path, slow_drv)) of
+ ok ->
+ do_system_monitor_long_schedule();
+ _Error ->
+ {skip, "Unable to load slow_drv (windows or no usleep()?)"}
+ end.
+do_system_monitor_long_schedule() ->
+ start_monitor(),
+ Port = open_port({spawn_driver,slow_drv}, []),
+ "ok" = erlang:port_control(Port,0,[]),
+ Self = self(),
+ receive
+ {Self,L} when is_list(L) ->
+ ok
+ after 1000 ->
+ ?t:fail(no_trace_of_pid)
+ end,
+ "ok" = erlang:port_control(Port,1,[]),
+ "ok" = erlang:port_control(Port,2,[]),
+ receive
+ {Port,LL} when is_list(LL) ->
+ ok
+ after 1000 ->
+ ?t:fail(no_trace_of_port)
+ end,
+ port_close(Port),
+ erlang:system_monitor(undefined),
+ ok.
+
+
-define(LONG_GC_SLEEP, 670).
system_monitor_long_gc_1(suite) ->
@@ -1521,3 +1582,11 @@ issue_non_empty_runq_warning(DeadLine, RQLen) ->
" Processes info: ~p~n",
[DeadLine div 1000, RQLen, self(), PIs]),
receive after 1000 -> ok end.
+
+load_driver(Dir, Driver) ->
+ case erl_ddll:load_driver(Dir, Driver) of
+ ok -> ok;
+ {error, Error} = Res ->
+ io:format("~s\n", [erl_ddll:format_error(Error)]),
+ Res
+ end.
diff --git a/erts/emulator/test/trace_SUITE_data/Makefile.src b/erts/emulator/test/trace_SUITE_data/Makefile.src
new file mode 100644
index 0000000000..4cd9249b8f
--- /dev/null
+++ b/erts/emulator/test/trace_SUITE_data/Makefile.src
@@ -0,0 +1,5 @@
+DRVS = slow_drv@dll@
+
+all: $(DRVS)
+
+@SHLIB_RULES@
diff --git a/erts/emulator/test/trace_SUITE_data/slow_drv.c b/erts/emulator/test/trace_SUITE_data/slow_drv.c
new file mode 100644
index 0000000000..c3e9db0fb8
--- /dev/null
+++ b/erts/emulator/test/trace_SUITE_data/slow_drv.c
@@ -0,0 +1,205 @@
+/* ``The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved via the world wide web at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+ * Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+ * AB. All Rights Reserved.''
+ *
+ * $Id$
+ */
+
+#ifndef UNIX
+#if !defined(__WIN32__) && !defined(VXWORKS)
+#define UNIX 1
+#endif
+#endif
+
+/* We actually only want to run this on
+ Unix machines which have the usleep call */
+#if defined(UNIX) && !defined(HAVE_USLEEP)
+#undef UNIX
+#endif
+
+#ifdef UNIX
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h> /* rand */
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#ifdef HAVE_POLL_H
+# include <poll.h>
+#endif
+#endif /* UNIX */
+
+#include "erl_driver.h"
+
+static int slow_drv_init(void);
+static void slow_drv_finish(void);
+static ErlDrvData slow_drv_start(ErlDrvPort, char *);
+static void slow_drv_stop(ErlDrvData);
+static void slow_drv_ready_input(ErlDrvData, ErlDrvEvent);
+static ErlDrvSSizeT slow_drv_control(ErlDrvData, unsigned int,
+ char *, ErlDrvSizeT, char **, ErlDrvSizeT);
+
+static ErlDrvEntry slow_drv_entry = {
+ slow_drv_init,
+ slow_drv_start,
+ slow_drv_stop,
+ NULL, /* output */
+ slow_drv_ready_input,
+ NULL, /* ready_output */
+ "slow_drv",
+ slow_drv_finish,
+ NULL, /* handle */
+ slow_drv_control,
+ NULL, /* timeout */
+ NULL, /* outputv */
+ NULL, /* ready_async */
+ NULL, /* flush */
+ NULL, /* call */
+ NULL, /* event */
+
+ ERL_DRV_EXTENDED_MARKER,
+ ERL_DRV_EXTENDED_MAJOR_VERSION,
+ ERL_DRV_EXTENDED_MINOR_VERSION,
+ ERL_DRV_FLAG_USE_PORT_LOCKING,
+ NULL,/* void *handle2 */
+ NULL,/* process_exit */
+ NULL /* stop select */
+};
+typedef struct {
+ ErlDrvPort port;
+ ErlDrvTermData id;
+ int test;
+ int s[2];
+} SlowDrvData;
+
+/* -------------------------------------------------------------------------
+** Entry functions
+**/
+
+DRIVER_INIT(slow_drv)
+{
+ return &slow_drv_entry;
+}
+
+
+static int
+slow_drv_init(void)
+{
+ return 0;
+}
+
+static void
+slow_drv_finish(void)
+{
+}
+
+
+static ErlDrvData
+slow_drv_start(ErlDrvPort port, char *command)
+{
+#ifndef UNIX
+ return NULL;
+#else
+ SlowDrvData *sddp = driver_alloc(sizeof(SlowDrvData));
+ if (!sddp) {
+ errno = ENOMEM;
+ return ERL_DRV_ERROR_ERRNO;
+ }
+ sddp->port = port;
+ sddp->id = driver_mk_port(port);
+ sddp->test = 0;
+ sddp->s[0] = sddp->s[1] = -1;
+ return (ErlDrvData) sddp;
+#endif
+}
+
+static void
+slow_drv_stop(ErlDrvData drv_data) {
+#ifdef UNIX
+ SlowDrvData *sddp = (SlowDrvData *) drv_data;
+
+ if (sddp->test) {
+ driver_select(sddp->port, (ErlDrvEvent) (ErlDrvSInt) sddp->s[0], DO_READ, 0);
+ close(sddp->s[0]);
+ close(sddp->s[1]);
+ }
+
+ driver_free((void *) sddp);
+
+#endif
+}
+
+static ErlDrvSSizeT
+slow_drv_control(ErlDrvData drv_data,
+ unsigned int command,
+ char *buf, ErlDrvSizeT len,
+ char **rbuf, ErlDrvSizeT rlen)
+{
+ SlowDrvData *sddp = (SlowDrvData *) drv_data;
+ char *res_str = "ok";
+ int res_len;
+ switch (command) {
+ case 0:
+ /* just be slow */
+ usleep(222000);
+ break;
+ case 1:
+ /* create pipes and select on input */
+ if (sddp->test) {
+ res_str = "no";
+ break;
+ }
+ sddp->test = 1;
+ pipe(sddp->s);
+ driver_select(sddp->port, (ErlDrvEvent) (ErlDrvSInt) sddp->s[0], DO_READ, 1);
+ break;
+ case 2:
+ if (!sddp->test) {
+ res_str = "no";
+ break;
+ }
+ write(sddp->s[1],"boo",3);
+ break;
+ }
+
+ res_len = strlen(res_str);
+ if (res_len > rlen) {
+ char *abuf = driver_alloc(sizeof(char)*res_len);
+ if (!abuf)
+ return 0;
+ *rbuf = abuf;
+ }
+
+ memcpy((void *) *rbuf, (void *) res_str, res_len);
+
+ return res_len;
+}
+
+static void
+slow_drv_ready_input(ErlDrvData drv_data, ErlDrvEvent event)
+{
+#ifdef UNIX
+ SlowDrvData *sddp = (SlowDrvData *) drv_data;
+ int fd = (int) (ErlDrvSInt) event;
+ if (sddp->test) {
+ char buff[3];
+ usleep(212000);
+ read(sddp->s[0],buff,3);
+ driver_output(sddp->port, "TheEnd", 6);
+ }
+
+#endif
+}
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