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authorRickard Green <[email protected]>2016-05-26 16:17:45 +0200
committerRickard Green <[email protected]>2016-05-26 16:49:25 +0200
commit8241eb36a733d6fee7c4a6f12c8bdfc206889795 (patch)
treea8270151f11bd96846ae837bd99d72b49522a576
parente5f436615f0649a4d19b03762c016e91e0dce0eb (diff)
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Fix message queue update on replacement and removal of message
-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
3 files changed, 39 insertions, 20 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 579f6e427d..b761522d91 100644
--- a/erts/emulator/beam/erl_message.c
+++ b/erts/emulator/beam/erl_message.c
@@ -1371,10 +1371,10 @@ 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--;
@@ -1411,12 +1411,7 @@ 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