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authorRickard Green <[email protected]>2015-07-06 20:25:28 +0200
committerRickard Green <[email protected]>2015-07-06 20:31:40 +0200
commite98fb1920ad053d2db4594c5d33cdfcfcdc6d771 (patch)
tree5c92e9761b27e630690bcd9802a9789fd77f716f /erts/emulator/beam
parent6ef7131e497afa22d6e87e3c8082ee861a56781b (diff)
downloadotp-e98fb1920ad053d2db4594c5d33cdfcfcdc6d771.tar.gz
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Teach non-smp VM how to deal with trace port crash
Diffstat (limited to 'erts/emulator/beam')
-rw-r--r--erts/emulator/beam/beam_emu.c44
-rw-r--r--erts/emulator/beam/erl_process.c16
2 files changed, 59 insertions, 1 deletions
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,