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| author | Rickard Green <[email protected]> | 2011-04-06 09:53:04 +0200 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2011-04-11 17:29:38 +0200 |
| commit | 4458257e5c9c48d43fa0ea4fa981436f364e14e2 (patch) | |
| tree | 8e460023396d24b84b7f30a0107d79fadf27cd45 /erts/emulator/beam | |
| parent | b24144e3aec3d4fc0965c8621c5cd8ed63083d34 (diff) | |
| download | otp-4458257e5c9c48d43fa0ea4fa981436f364e14e2.tar.gz otp-4458257e5c9c48d43fa0ea4fa981436f364e14e2.tar.bz2 otp-4458257e5c9c48d43fa0ea4fa981436f364e14e2.zip | |
Only set status P_WAITING when needed
The status of a process was unnecessarily set to waiting before
the process was enqueued in a run queue. This bug was harmless
up until OTP-R14B01. In OTP-R14B02 erlang:hibernate/3 was fixed
(OTP-9125). After the introduction of OTP-9125, the previously
harmless process status bug sometimes caused erroneous badarg
exceptions from process_info().
Diffstat (limited to 'erts/emulator/beam')
| -rw-r--r-- | erts/emulator/beam/beam_emu.c | 3 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_process.c | 8 |
2 files changed, 5 insertions, 6 deletions
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c index 7b2aac0908..df9d067727 100644 --- a/erts/emulator/beam/beam_emu.c +++ b/erts/emulator/beam/beam_emu.c @@ -6276,12 +6276,13 @@ erts_hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* re PROCESS_MAIN_CHK_LOCKS(c_p); erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); ASSERT(!ERTS_PROC_IS_EXITING(c_p)); - c_p->status = P_WAITING; #ifdef ERTS_SMP ERTS_SMP_MSGQ_MV_INQ2PRIVQ(c_p); if (c_p->msg.len > 0) erts_add_to_runq(c_p); + else #endif + c_p->status = P_WAITING; } erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS); c_p->current = bif_export[BIF_hibernate_3]->code; diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index 428ca12eb1..f6e4e9df11 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -2857,7 +2857,6 @@ resume_process(Process *p) return; switch(p->rstatus) { case P_RUNABLE: - *statusp = P_WAITING; /* make erts_add_to_runq work */ erts_add_to_runq(p); break; case P_WAITING: @@ -4653,7 +4652,7 @@ internal_add_to_runq(ErtsRunQueue *runq, Process *p) if (p->status_flags & ERTS_PROC_SFLG_INRUNQ) return NULL; else if (p->runq_flags & ERTS_PROC_RUNQ_FLG_RUNNING) { - ASSERT(p->status != P_SUSPENDED); + ASSERT(p->rcount == 0); ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(runq, p); p->status_flags |= ERTS_PROC_SFLG_PENDADD2SCHEDQ; return NULL; @@ -4664,9 +4663,8 @@ internal_add_to_runq(ErtsRunQueue *runq, Process *p) ERTS_DBG_CHK_PROCS_RUNQ_NOPROC(runq, p); #ifndef ERTS_SMP /* Never schedule a suspended process (ok in smp case) */ - ASSERT(p->status != P_SUSPENDED); + ASSERT(p->rcount == 0); add_runq = runq; - #else ASSERT(!p->bound_runq || p->bound_runq == p->run_queue); if (p->bound_runq) { @@ -5166,7 +5164,7 @@ Process *schedule(Process *p, int calls) handle_pending_suspend(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); ASSERT(!(p->status_flags & ERTS_PROC_SFLG_PENDADD2SCHEDQ) - || p->status != P_SUSPENDED); + || p->rcount == 0); } #endif erts_smp_runq_lock(rq); |