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authorRickard Green <[email protected]>2018-05-11 18:49:28 +0200
committerRickard Green <[email protected]>2018-05-16 13:30:09 +0200
commit1f2268308b837b797220a1d7419504f19742c265 (patch)
treee3c6fc6f4395f0eec5a53df1b7e74a4c13d449c4 /erts/emulator/beam
parent6c9405c04b964336820e2816fc066158a40ab2b2 (diff)
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Fix erts_try_lock_sig_free_proc()
Diffstat (limited to 'erts/emulator/beam')
-rw-r--r--erts/emulator/beam/erl_bif_info.c1
-rw-r--r--erts/emulator/beam/erl_process.c48
2 files changed, 27 insertions, 22 deletions
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index 8f04ff7353..55450e397f 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -1160,6 +1160,7 @@ process_info_bif(Process *c_p, Eterm pid, Eterm opt, int always_wrap, int pi2)
else {
if (flags & ERTS_PI_FLAG_FORCE_SIG_SEND)
goto send_signal;
+ state = ERTS_PSFLG_RUNNING; /* fail state... */
rp = erts_try_lock_sig_free_proc(pid, locks, &state);
if (!rp)
goto undefined;
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index f3e77df2fd..b373d08a6b 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -8656,6 +8656,13 @@ erts_internal_suspend_process_2(BIF_ALIST_2)
Process *rp;
int send_sig = 0;
+ /* fail state... */
+ state = (ERTS_PSFLG_EXITING
+ | ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_DIRTY_RUNNING
+ | ERTS_PSFLG_DIRTY_RUNNING_SYS);
+
rp = erts_try_lock_sig_free_proc(BIF_ARG_1,
ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS,
&state);
@@ -8663,16 +8670,7 @@ erts_internal_suspend_process_2(BIF_ALIST_2)
goto noproc;
if (rp == ERTS_PROC_LOCK_BUSY)
send_sig = !0;
- else if (state & (ERTS_PSFLG_EXITING
- | ERTS_PSFLG_RUNNING
- | ERTS_PSFLG_RUNNING_SYS
- | ERTS_PSFLG_DIRTY_RUNNING
- | ERTS_PSFLG_DIRTY_RUNNING_SYS)) {
- erts_proc_unlock(rp, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS);
- send_sig = !0;
- }
-
- if (!send_sig && rp) {
+ else {
send_sig = !suspend_process(BIF_P, rp);
if (!send_sig) {
erts_monitor_list_insert(&ERTS_P_LT_MONITORS(rp), &mdp->target);
@@ -12497,7 +12495,13 @@ erts_try_lock_sig_free_proc(Eterm pid, ErtsProcLocks locks,
erts_aint32_t *statep)
{
Process *rp = erts_proc_lookup_raw(pid);
+ erts_aint32_t fail_state = ERTS_PSFLG_SIG_IN_Q|ERTS_PSFLG_SIG_Q;
erts_aint32_t state;
+ ErtsProcLocks tmp_locks = ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_MSGQ;
+
+ tmp_locks |= locks;
+ if (statep)
+ fail_state |= *statep;
if (!rp) {
if (statep)
@@ -12514,28 +12518,28 @@ erts_try_lock_sig_free_proc(Eterm pid, ErtsProcLocks locks,
if (state & ERTS_PSFLG_FREE)
return NULL;
- if (state & (ERTS_PSFLG_SIG_IN_Q|ERTS_PSFLG_SIG_Q))
+ if (state & fail_state)
return ERTS_PROC_LOCK_BUSY;
- if (!locks)
- return rp;
-
- if (erts_proc_trylock(rp, locks) == EBUSY)
+ if (erts_proc_trylock(rp, tmp_locks) == EBUSY)
return ERTS_PROC_LOCK_BUSY;
state = erts_atomic32_read_nob(&rp->state);
if (statep)
*statep = state;
- if (state & ERTS_PSFLG_FREE) {
- erts_proc_unlock(rp, locks);
- return NULL;
+ if ((state & fail_state)
+ || rp->sig_inq.first
+ || rp->sig_qs.cont) {
+ erts_proc_unlock(rp, tmp_locks);
+ if (state & ERTS_PSFLG_FREE)
+ return NULL;
+ else
+ return ERTS_PROC_LOCK_BUSY;
}
- if (state & (ERTS_PSFLG_SIG_IN_Q|ERTS_PSFLG_SIG_Q)) {
- erts_proc_unlock(rp, locks);
- return ERTS_PROC_LOCK_BUSY;
- }
+ if (tmp_locks != locks)
+ erts_proc_unlock(rp, tmp_locks & ~locks);
return rp;
}