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authorRickard Green <[email protected]>2016-05-27 10:21:30 +0200
committerRickard Green <[email protected]>2016-05-27 10:21:30 +0200
commita390d27f5c39d5a120db1f3e8e7185f85a05debd (patch)
tree3bd2a5e996576f5d07213f298e67b5a947b68ccf /erts
parent48d0c9844b1d205683dd3ef2ab6719e3f0f14aba (diff)
parent20383144c26512fe33e72f49dff52dc628666923 (diff)
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Merge branch 'rickard/on_heap-fix/OTP-13366'
* rickard/on_heap-fix/OTP-13366: Improve message allocation in enif_send() Fix message queue update on replacement and removal of message
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/beam/erl_gc.c15
-rw-r--r--erts/emulator/beam/erl_message.c15
-rw-r--r--erts/emulator/beam/erl_message.h29
-rw-r--r--erts/emulator/beam/erl_nif.c24
4 files changed, 60 insertions, 23 deletions
diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c
index 374da9407c..c7bbbd5ca0 100644
--- a/erts/emulator/beam/erl_gc.c
+++ b/erts/emulator/beam/erl_gc.c
@@ -2293,18 +2293,13 @@ move_msgq_to_heap(Process *p)
free_message_buffer(bp);
}
else {
- ErtsMessage *tmp = erts_alloc_message(0, NULL);
- sys_memcpy((void *) tmp->m, (void *) mp->m,
- sizeof(Eterm)*ERL_MESSAGE_REF_ARRAY_SZ);
- tmp->next = mp->next;
- if (p->msg.save == &mp->next)
- p->msg.save = &tmp->next;
- if (p->msg.last == &mp->next)
- p->msg.last = &tmp->next;
- *mpp = tmp;
+ ErtsMessage *new_mp = erts_alloc_message(0, NULL);
+ sys_memcpy((void *) new_mp->m, (void *) mp->m,
+ sizeof(Eterm)*ERL_MESSAGE_REF_ARRAY_SZ);
+ erts_msgq_replace_msg_ref(&p->msg, new_mp, mpp);
mp->next = NULL;
erts_cleanup_messages(mp);
- mp = tmp;
+ mp = new_mp;
}
}
diff --git a/erts/emulator/beam/erl_message.c b/erts/emulator/beam/erl_message.c
index d82532b354..ac7b9d6606 100644
--- a/erts/emulator/beam/erl_message.c
+++ b/erts/emulator/beam/erl_message.c
@@ -1345,10 +1345,10 @@ erts_prep_msgq_for_inspection(Process *c_p, Process *rp,
mpp = i == 0 ? &rp->msg.first : &mip[i-1].msgp->next;
- if (rp->msg.save == &bad_mp->next)
- rp->msg.save = mpp;
- if (rp->msg.last == &bad_mp->next)
- rp->msg.last = mpp;
+ ASSERT((*mpp)->next == bad_mp);
+
+ erts_msgq_update_internal_pointers(&rp->msg, mpp, &bad_mp->next);
+
mp = mp->next;
*mpp = mp;
rp->msg.len--;
@@ -1385,12 +1385,7 @@ erts_prep_msgq_for_inspection(Process *c_p, Process *rp,
sys_memcpy((void *) tmp->m, (void *) mp->m,
sizeof(Eterm)*ERL_MESSAGE_REF_ARRAY_SZ);
mpp = i == 0 ? &rp->msg.first : &mip[i-1].msgp->next;
- tmp->next = mp->next;
- if (rp->msg.save == &mp->next)
- rp->msg.save = &tmp->next;
- if (rp->msg.last == &mp->next)
- rp->msg.last = &tmp->next;
- *mpp = tmp;
+ erts_msgq_replace_msg_ref(&rp->msg, tmp, mpp);
erts_save_message_in_proc(rp, mp);
mp = tmp;
}
diff --git a/erts/emulator/beam/erl_message.h b/erts/emulator/beam/erl_message.h
index 46063ea0c2..6df969367b 100644
--- a/erts/emulator/beam/erl_message.h
+++ b/erts/emulator/beam/erl_message.h
@@ -366,6 +366,12 @@ ERTS_GLB_FORCE_INLINE ErtsMessage *erts_shrink_message(ErtsMessage *mp, Uint sz,
ERTS_GLB_FORCE_INLINE void erts_free_message(ErtsMessage *mp);
ERTS_GLB_INLINE Uint erts_used_frag_sz(const ErlHeapFragment*);
ERTS_GLB_INLINE Uint erts_msg_attached_data_size(ErtsMessage *msg);
+ERTS_GLB_INLINE void erts_msgq_update_internal_pointers(ErlMessageQueue *msgq,
+ ErtsMessage **newpp,
+ ErtsMessage **oldpp);
+ERTS_GLB_INLINE void erts_msgq_replace_msg_ref(ErlMessageQueue *msgq,
+ ErtsMessage *newp,
+ ErtsMessage **oldpp);
#define ERTS_MSG_COMBINED_HFRAG ((void *) 0x1)
@@ -468,6 +474,29 @@ ERTS_GLB_INLINE Uint erts_msg_attached_data_size(ErtsMessage *msg)
return sz;
}
}
+
+ERTS_GLB_INLINE void
+erts_msgq_update_internal_pointers(ErlMessageQueue *msgq,
+ ErtsMessage **newpp,
+ ErtsMessage **oldpp)
+{
+ if (msgq->save == oldpp)
+ msgq->save = newpp;
+ if (msgq->last == oldpp)
+ msgq->last = newpp;
+ if (msgq->saved_last == oldpp)
+ msgq->saved_last = newpp;
+}
+
+ERTS_GLB_INLINE void
+erts_msgq_replace_msg_ref(ErlMessageQueue *msgq, ErtsMessage *newp, ErtsMessage **oldpp)
+{
+ ErtsMessage *oldp = *oldpp;
+ newp->next = oldp->next;
+ erts_msgq_update_internal_pointers(msgq, &newp->next, &oldp->next);
+ *oldpp = newp;
+}
+
#endif
#endif
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index 606b73c7b5..2bbb8e3c91 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -623,10 +623,28 @@ int enif_send(ErlNifEnv* env, const ErlNifPid* to_pid,
}
} else {
Uint sz = size_object(msg);
+ ErlOffHeap *ohp;
Eterm *hp;
- mp = erts_alloc_message(sz, &hp);
- msg = copy_struct(msg, sz, &hp, &mp->hfrag.off_heap);
- ASSERT(hp == mp->hfrag.mem+mp->hfrag.used_size);
+ if (env && !env->tracee) {
+ flush_env(env);
+ mp = erts_alloc_message_heap(rp, &rp_locks, sz, &hp, &ohp);
+ cache_env(env);
+ }
+ else {
+ erts_aint_t state = erts_smp_atomic32_read_nob(&rp->state);
+ if (state & ERTS_PSFLG_OFF_HEAP_MSGQ) {
+ mp = erts_alloc_message(sz, &hp);
+ ohp = sz == 0 ? NULL : &mp->hfrag.off_heap;
+ }
+ else {
+ ErlHeapFragment *bp = new_message_buffer(sz);
+ mp = erts_alloc_message(0, NULL);
+ mp->data.heap_frag = bp;
+ hp = bp->mem;
+ ohp = &bp->off_heap;
+ }
+ }
+ msg = copy_struct(msg, sz, &hp, ohp);
}
ERL_MESSAGE_TERM(mp) = msg;