Merge branch 'lukas/erts/fragment-dist-messages/OTP-13397/OTP-15610/OTP-15611/OTP-15612/OTP-15613/OTP-15703'

* lukas/erts/fragment-dist-messages/OTP-13397/OTP-15610/OTP-15611/OTP-15612/OTP-15613/OTP-15703: (26 commits)
  erts: Yield when exiting/free process is suspended by de
  doc: Fix Design Princ, statem incorrect anchor
  erts: Include external msg in need of GC
  erts: Include dist header in return from dist_ctrl_get_data
  erts: Fix so that exit/down terms stay alive
  erts: Pending signals can be for free processes
  erts: Fix faulty assert in reference_table_term
  etp: Don't crash etp-stack* when c_p->i is null
  erts: Adjust dist obuf size correctly after hdr fin
  erts: Fix non-payload dist exit signals
  erts: Always do trylock on proc locks when crash dumping
  Fix tests to work better in debug emulator
  erts: erts_factory_proc_init should not set hole marker
  erts: Skip heavy process tab tests in debug emu
  ts: Use same dynlinking logic for all bsd
  Revert "erts: Always run fds check after each testcase"
  erts: Always run fds check after each testcase
  erts: Always stop any testnodes before testcase exits
  erts: Add crash dumping of EXITING and FREE processes
  wx: Remove ERL_FLAGS from Makefile erlc command
  ...

29 files changed, 368 insertions, 209 deletions

diff --git a/Makefile.in b/Makefile.in
index 49a0d9f8af..6cbd92a55b 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -492,31 +492,14 @@ else
 		$(MAKE) opt BUILD_ALL=true
 	$(V_at)test -f $(ERL_TOP)/make/otp_built || echo "OTP built" > $(ERL_TOP)/make/otp_built
 endif
-kernel:
-	$(make_verbose)cd lib/kernel && \
-	  ERL_TOP=$(ERL_TOP) PATH=$(BOOT_PREFIX)"$${PATH}" \
-		$(MAKE) opt BUILD_ALL=true
 
-stdlib:
-	$(make_verbose)cd lib/stdlib && \
-	  ERL_TOP=$(ERL_TOP) PATH=$(BOOT_PREFIX)"$${PATH}" \
-		$(MAKE) opt BUILD_ALL=true
+APPS=$(patsubst $(ERL_TOP)/lib/%/doc,%,$(wildcard $(ERL_TOP)/lib/*/doc))
 
-compiler:
-	$(make_verbose)cd lib/compiler && \
+$(APPS):
+	$(make_verbose)cd lib/$@ && \
 	  ERL_TOP=$(ERL_TOP) PATH=$(BOOT_PREFIX)"$${PATH}" \
 		$(MAKE) opt BUILD_ALL=true
 
-hipe:
-	$(make_verbose)cd lib/hipe && \
-	  ERL_TOP=$(ERL_TOP) PATH=$(BOOT_PREFIX)"$${PATH}" \
-		$(MAKE) opt BUILD_ALL=true
-
-syntax_tools:
-	$(make_verbose)cd lib/syntax_tools && \
-	ERL_TOP=$(ERL_TOP) PATH=$(BOOT_PREFIX)"$${PATH}" \
-	    $(MAKE) opt BUILD_ALL=true
-
 preloaded:
 	$(make_verbose)cd erts/preloaded/src && \
 	ERL_TOP=$(ERL_TOP) PATH=$(BOOT_PREFIX)"$${PATH}" \
diff --git a/erts/Makefile b/erts/Makefile
index 60c70b6a2c..e62c896170 100644
--- a/erts/Makefile
+++ b/erts/Makefile
@@ -129,9 +129,13 @@ makefiles:
 
 .PHONY: release
 release:
+ifeq ($(TYPE),)
 	for t in $(TYPES); do \
 	  ( cd emulator && $(MAKE) release TYPE=$$t ) || exit $$?; \
 	done
+else
+	( cd emulator && $(MAKE) release TYPE=$(TYPE) ) || exit $$?;
+endif
 	$(V_at)for d in $(ERTSDIRS) $(XINSTDIRS); do \
 		if test -d $$d; then \
 			( cd $$d && $(MAKE) $@ ) || exit $$? ; \
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index 27bf2187c2..06d8c7cda8 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -39,6 +39,7 @@
 #include "erl_hl_timer.h"
 #include "erl_thr_progress.h"
 #include "erl_proc_sig_queue.h"
+#include "dist.h"
 
 /* Forward declarations -- should really appear somewhere else */
 static void process_killer(void);
@@ -74,6 +75,7 @@ port_info(fmtfn_t to, void *to_arg)
 void
 process_info(fmtfn_t to, void *to_arg)
 {
+    ErtsSchedulerData *esdp = erts_get_scheduler_data();
     int i, max = erts_ptab_max(&erts_proc);
     for (i = 0; i < max; i++) {
 	Process *p = erts_pix2proc(i);
@@ -81,11 +83,35 @@ process_info(fmtfn_t to, void *to_arg)
 	    /* Do not include processes with no heap,
 	     * they are most likely just created and has invalid data
 	     */
-	    if (!ERTS_PROC_IS_EXITING(p) && p->heap != NULL)
-		print_process_info(to, to_arg, p, 0);
+	    if (p->heap != NULL) {
+                ErtsProcLocks locks = (p == esdp->current_process ||
+                                       p == esdp->free_process) ? ERTS_PROC_LOCK_MAIN : 0;
+		print_process_info(to, to_arg, p, locks);
+            }
 	}
     }
 
+    /* Look for FREE processes in the run-queues and dist entries.
+       These have been removed from the ptab but we still want them
+       in the crash dump for debugging. */
+
+    /* First loop through all run-queues */
+    for (i = 0; i < erts_no_schedulers + ERTS_NUM_DIRTY_RUNQS; i++) {
+        ErtsRunQueue *rq = ERTS_RUNQ_IX(i);
+        int j;
+        for (j = 0; j < ERTS_NO_PROC_PRIO_QUEUES; j++) {
+            Process *p = rq->procs.prio[j].first;
+            while (p) {
+                if (ERTS_PSFLG_FREE & erts_atomic32_read_acqb(&p->state))
+                    print_process_info(to, to_arg, p, 0);
+                p = p->next;
+            }
+        }
+    }
+
+    /* Then check all dist entries */
+    erts_dist_print_procs_suspended_on_de(to, to_arg);
+
     port_info(to, to_arg);
 }
 
@@ -199,13 +225,14 @@ static int doit_print_monitor(ErtsMonitor *mon, void *vpcontext, Sint reds)
     }
     return 1;
 }
-			       
+
 /* Display info about an individual Erlang process */
 void
 print_process_info(fmtfn_t to, void *to_arg, Process *p, ErtsProcLocks orig_locks)
 {
     int garbing = 0;
     int running = 0;
+    int exiting = 0;
     Sint len;
     struct saved_calls *scb;
     erts_aint32_t state;
@@ -226,9 +253,12 @@ print_process_info(fmtfn_t to, void *to_arg, Process *p, ErtsProcLocks orig_lock
 			| ERTS_PSFLG_DIRTY_RUNNING))
         running = 1;
 
+    if (state & ERTS_PSFLG_EXITING)
+        exiting = 1;
+
     if (!(locks & ERTS_PROC_LOCK_MAIN)) {
         locks |= ERTS_PROC_LOCK_MAIN;
-        if (ERTS_IS_CRASH_DUMPING && running) {
+        if (ERTS_IS_CRASH_DUMPING) {
             if (erts_proc_trylock(p, locks)) {
                 /* crash dumping and main lock taken, this probably means that
                    the process is doing a GC on a dirty-scheduler... so we cannot
@@ -246,7 +276,7 @@ print_process_info(fmtfn_t to, void *to_arg, Process *p, ErtsProcLocks orig_lock
      * If the process is registered as a global process, display the
      * registered name
      */
-    if (p->common.u.alive.reg)
+    if (!ERTS_PROC_IS_EXITING(p) && p->common.u.alive.reg)
 	erts_print(to, to_arg, "Name: %T\n", p->common.u.alive.reg->name);
 
     /*
@@ -332,7 +362,7 @@ print_process_info(fmtfn_t to, void *to_arg, Process *p, ErtsProcLocks orig_lock
     }
 
     /* display the links only if there are any*/
-    if (ERTS_P_LINKS(p) || ERTS_P_MONITORS(p) || ERTS_P_LT_MONITORS(p)) {
+    if (!exiting && (ERTS_P_LINKS(p) || ERTS_P_MONITORS(p) || ERTS_P_LT_MONITORS(p))) {
 	PrintMonitorContext context = {1, to, to_arg};
 	erts_print(to, to_arg,"Link list: [");
 	erts_link_tree_foreach(ERTS_P_LINKS(p), doit_print_link, &context);	
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index a1da1addf9..8bbe6450eb 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -772,77 +772,25 @@ void init_dist(void)
 
 #define ErtsDistOutputBuf2Binary(OB) OB->bin
 
-#ifdef DEBUG
-
-struct obuf_list;
-struct obuf_list {
-    erts_refc_t refc;
-    struct obuf_list *next;
-    struct obuf_list *prev;
-};
-#define obuf_list_size sizeof(struct obuf_list)
-static struct obuf_list *erts_obuf_list = NULL;
-static erts_mtx_t erts_obuf_list_mtx;
-
-static void
-insert_obuf(struct obuf_list *obuf, erts_aint_t initial) {
-    erts_mtx_lock(&erts_obuf_list_mtx);
-    obuf->next = erts_obuf_list;
-    obuf->prev = NULL;
-    erts_refc_init(&obuf->refc, initial);
-    if (erts_obuf_list)
-        erts_obuf_list->prev = obuf;
-    erts_obuf_list = obuf;
-    erts_mtx_unlock(&erts_obuf_list_mtx);
-}
-
-static void
-remove_obuf(struct obuf_list *obuf) {
-    if (erts_refc_dectest(&obuf->refc, 0) == 0) {
-        erts_mtx_lock(&erts_obuf_list_mtx);
-        if (obuf->prev) {
-            obuf->prev->next = obuf->next;
-        } else {
-            erts_obuf_list = obuf->next;
-        }
-        if (obuf->next) obuf->next->prev = obuf->prev;
-        erts_mtx_unlock(&erts_obuf_list_mtx);
-    }
-}
-
-void check_obuf(void);
-void check_obuf(void) {
-    erts_mtx_lock(&erts_obuf_list_mtx);
-    ERTS_ASSERT(erts_obuf_list == NULL);
-    erts_mtx_unlock(&erts_obuf_list_mtx);
-}
-#else
-#define insert_obuf(...)
-#define remove_obuf(...)
-#define obuf_list_size 0
-#endif
-
 static ERTS_INLINE ErtsDistOutputBuf *
 alloc_dist_obuf(Uint size, Uint headers)
 {
     int i;
     ErtsDistOutputBuf *obuf;
     Uint obuf_size = sizeof(ErtsDistOutputBuf)*(headers) +
-        sizeof(byte)*size + obuf_list_size;
+        sizeof(byte)*size;
     Binary *bin = erts_bin_drv_alloc(obuf_size);
-    size += obuf_list_size;
     obuf = (ErtsDistOutputBuf *) &bin->orig_bytes[size];
     erts_refc_add(&bin->intern.refc, headers - 1, 1);
     for (i = 0; i < headers; i++) {
         obuf[i].bin = bin;
-        obuf[i].extp = (byte *)&bin->orig_bytes[0] + obuf_list_size;
+        obuf[i].extp = (byte *)&bin->orig_bytes[0];
 #ifdef DEBUG
         obuf[i].dbg_pattern = ERTS_DIST_OUTPUT_BUF_DBG_PATTERN;
         obuf[i].alloc_endp = obuf->extp + size;
         ASSERT(bin == ErtsDistOutputBuf2Binary(obuf));
 #endif
     }
-    insert_obuf((struct obuf_list*)&bin->orig_bytes[0], headers);
     return obuf;
 }
 
@@ -851,10 +799,7 @@ free_dist_obuf(ErtsDistOutputBuf *obuf)
 {
     Binary *bin = ErtsDistOutputBuf2Binary(obuf);
     ASSERT(obuf->dbg_pattern == ERTS_DIST_OUTPUT_BUF_DBG_PATTERN);
-    remove_obuf((struct obuf_list*)&bin->orig_bytes[0]);
-    if (erts_refc_dectest(&bin->intern.refc, 0) == 0) {
-        erts_bin_free(bin);
-    }
+    erts_bin_release(bin);
 }
 
 static ERTS_INLINE Sint
@@ -1968,6 +1913,7 @@ int erts_net_message(Port *prt,
                 goto invalid_message;
             }
             reason = tuple[5];
+            edep = NULL;
         }
 
 	if (is_not_ref(ref))
@@ -2014,12 +1960,14 @@ int erts_net_message(Port *prt,
 	    }
 	    token = NIL;
 	    reason = tuple[4];
+            edep = NULL;
 	} else if (type == DOP_EXIT_TT){
 	    if (tuple_arity != 5) {
 		goto invalid_message;
 	    }
 	    token = tuple[4];
 	    reason = tuple[5];
+            edep = NULL;
 	} else if (type == DOP_PAYLOAD_EXIT) {
             if (tuple_arity != 3) {
 		goto invalid_message;
@@ -2067,12 +2015,14 @@ int erts_net_message(Port *prt,
 	    }
 	    reason = tuple[4];
 	    token = NIL;
+            edep = NULL;
 	} else if (type == DOP_EXIT2_TT) {
 	    if (tuple_arity != 5) {
 		goto invalid_message;
 	    }
 	    token = tuple[4];
 	    reason = tuple[5];
+            edep = NULL;
 	} else if (type == DOP_PAYLOAD_EXIT2) {
             if (tuple_arity != 3) {
 		goto invalid_message;
@@ -2430,8 +2380,8 @@ erts_dsig_send(ErtsDSigSendContext *ctx)
 	case ERTS_DSIG_SEND_PHASE_FIN: {
 
 	    ASSERT(ctx->obuf->extp < ctx->obuf->ext_endp);
-	    ASSERT(((byte*)&ctx->obuf->bin->orig_bytes[0]+obuf_list_size) <= ctx->obuf->extp - ctx->max_finalize_prepend);
-	    ASSERT(ctx->obuf->ext_endp <= ((byte*)ctx->obuf->bin->orig_bytes+obuf_list_size) + ctx->data_size + ctx->dhdr_ext_size);
+	    ASSERT(((byte*)&ctx->obuf->bin->orig_bytes[0]) <= ctx->obuf->extp - ctx->max_finalize_prepend);
+	    ASSERT(ctx->obuf->ext_endp <= ((byte*)ctx->obuf->bin->orig_bytes) + ctx->data_size + ctx->dhdr_ext_size);
 
 	    ctx->data_size = ctx->obuf->ext_endp - ctx->obuf->extp;
 
@@ -2935,7 +2885,9 @@ erts_dist_command(Port *prt, int initial_reds)
 	    ob = oq.first;
 	    ASSERT(ob);
 	    do {
+                obufsize += size_obuf(ob);
 		reds = erts_encode_ext_dist_header_finalize(ob, dep, flags, reds);
+                obufsize -= size_obuf(ob);
                 if (reds < 0)
                     break;
                 last_finalized  = ob;
@@ -2974,7 +2926,9 @@ erts_dist_command(Port *prt, int initial_reds)
 	while (oq.first && !preempt) {
 	    ErtsDistOutputBuf *fob;
 	    Uint size;
+            obufsize += size_obuf(oq.first);
             reds = erts_encode_ext_dist_header_finalize(oq.first, dep, flags, reds);
+            obufsize -= size_obuf(oq.first);
             if (reds < 0) {
                 preempt = 1;
                 break;
@@ -3407,14 +3361,13 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
 {
     DistEntry *dep = ERTS_PROC_GET_DIST_ENTRY(BIF_P);
     const Sint initial_reds = ERTS_BIF_REDS_LEFT(BIF_P);
-    Sint reds = initial_reds;
+    Sint reds = initial_reds, obufsize = 0;
     ErtsDistOutputBuf *obuf;
-    Eterm *hp;
+    Eterm *hp, res;
     ProcBin *pb;
     erts_aint_t qsize;
     Uint32 conn_id, get_size;
-    Eterm res;
-    Uint hsz, bin_sz;
+    Uint hsz = 0, bin_sz;
 
     if (!dep)
         BIF_ERROR(BIF_P, EXC_NOTSUP);
@@ -3466,7 +3419,9 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
         }
 
         obuf = dep->tmp_out_queue.first;
+        obufsize += size_obuf(obuf);
         reds = erts_encode_ext_dist_header_finalize(obuf, dep, dep->flags, reds);
+        obufsize -= size_obuf(obuf);
         if (reds < 0) {
             erts_de_runlock(dep);
             ERTS_BIF_YIELD1(bif_export[BIF_dist_ctrl_get_data_1],
@@ -3482,8 +3437,7 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
 
     erts_de_runlock(dep);
 
-    bin_sz = obuf->ext_endp - obuf->extp;
-    hsz = PROC_BIN_SIZE;
+    bin_sz = obuf->ext_endp - obuf->extp + obuf->hdr_endp - obuf->hdrp;
 
     get_size = dep->opts & ERTS_DIST_CTRL_OPT_GET_SIZE;
     if (get_size) {
@@ -3492,18 +3446,50 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
             hsz += BIG_UINT_HEAP_SIZE;
     }
 
-    hp = HAlloc(BIF_P, hsz);
-    pb = (ProcBin *) (char *) hp;
-    pb->thing_word = HEADER_PROC_BIN;
-    pb->size = bin_sz;
-    pb->next = MSO(BIF_P).first;
-    MSO(BIF_P).first = (struct erl_off_heap_header*) pb;
-    pb->val = ErtsDistOutputBuf2Binary(obuf);
-    pb->bytes = (byte*) obuf->extp;
-    pb->flags = 0;
-    hp += PROC_BIN_SIZE;
+    if (!obuf->hdrp) {
+        hp =  HAlloc(BIF_P, PROC_BIN_SIZE + hsz);
+        pb = (ProcBin *) (char *) hp;
+        pb->thing_word = HEADER_PROC_BIN;
+        pb->size = obuf->ext_endp - obuf->extp;
+        pb->next = MSO(BIF_P).first;
+        MSO(BIF_P).first = (struct erl_off_heap_header*) pb;
+        pb->val = ErtsDistOutputBuf2Binary(obuf);
+        pb->bytes = (byte*) obuf->extp;
+        pb->flags = 0;
+        res = make_binary(pb);
+    } else {
+        hp =  HAlloc(BIF_P, PROC_BIN_SIZE * 2 + 4 + hsz);
+        pb = (ProcBin *) (char *) hp;
+        pb->thing_word = HEADER_PROC_BIN;
+        pb->size = obuf->ext_endp - obuf->extp;
+        pb->next = MSO(BIF_P).first;
+        MSO(BIF_P).first = (struct erl_off_heap_header*) pb;
+        pb->val = ErtsDistOutputBuf2Binary(obuf);
+        pb->bytes = (byte*) obuf->extp;
+        pb->flags = 0;
+        hp += PROC_BIN_SIZE;
+
+        res = CONS(hp, make_binary(pb), NIL);
+        hp += 2;
+
+        pb = (ProcBin *) (char *) hp;
+        pb->thing_word = HEADER_PROC_BIN;
+        pb->size = obuf->hdr_endp - obuf->hdrp;
+        pb->next = MSO(BIF_P).first;
+        MSO(BIF_P).first = (struct erl_off_heap_header*) pb;
+        pb->val = ErtsDistOutputBuf2Binary(obuf);
+        erts_refc_inc(&pb->val->intern.refc, 1);
+        pb->bytes = (byte*) obuf->hdrp;
+        pb->flags = 0;
+        hp += PROC_BIN_SIZE;
+        res = CONS(hp, make_binary(pb), res);
+        hp += 2;
+    }
+
+    obufsize += size_obuf(obuf);
+
+    qsize = erts_atomic_add_read_nob(&dep->qsize, (erts_aint_t) -obufsize);
 
-    qsize = erts_atomic_add_read_nob(&dep->qsize, -size_obuf(obuf));
     ASSERT(qsize >= 0);
 
     if (qsize < erts_dist_buf_busy_limit/2
@@ -3518,8 +3504,6 @@ dist_ctrl_get_data_1(BIF_ALIST_1)
         }
     }
 
-    res = make_binary(pb);
-
     if (get_size) {
         Eterm sz_term;
         if (IS_USMALL(0, bin_sz))
@@ -4711,10 +4695,6 @@ init_nodes_monitors(void)
 {
     erts_mtx_init(&nodes_monitors_mtx, "nodes_monitors", NIL,
         ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
-#ifdef DEBUG
-    erts_mtx_init(&erts_obuf_list_mtx, "sad", NIL,
-                  ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION);
-#endif
     nodes_monitors = NULL;
     no_nodes_monitors = 0;
 }
@@ -5105,3 +5085,22 @@ erts_processes_monitoring_nodes(Process *c_p)
 
     return ctxt.res;
 }
+
+static void
+print_suspended_on_de(fmtfn_t to, void *to_arg, DistEntry *dep)
+{
+    for (; dep; dep = dep->next) {
+        ErtsProcList *curr = erts_proclist_peek_first(dep->suspended);
+        while (curr) {
+            if (!is_internal_pid(curr->u.pid))
+                print_process_info(to, to_arg, curr->u.p, 0);
+            curr = erts_proclist_peek_next(dep->suspended, curr);
+        }
+    }
+}
+
+void
+erts_dist_print_procs_suspended_on_de(fmtfn_t to, void *to_arg) {
+    print_suspended_on_de(to, to_arg, erts_hidden_dist_entries);
+    print_suspended_on_de(to, to_arg, erts_visible_dist_entries);
+}
diff --git a/erts/emulator/beam/dist.h b/erts/emulator/beam/dist.h
index 9b5e62ab7e..f953a2ab8c 100644
--- a/erts/emulator/beam/dist.h
+++ b/erts/emulator/beam/dist.h
@@ -319,5 +319,6 @@ extern int erts_dsig_prepare(ErtsDSigSendContext *,
                              int,
                              int);
 
+void erts_dist_print_procs_suspended_on_de(fmtfn_t to, void *to_arg);
 int erts_auto_connect(DistEntry* dep, Process *proc, ErtsProcLocks proc_locks);
 #endif
diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c
index 9317850d96..67a73e4d57 100644
--- a/erts/emulator/beam/erl_gc.c
+++ b/erts/emulator/beam/erl_gc.c
@@ -577,7 +577,7 @@ force_reschedule:
 }
 
 static ERTS_FORCE_INLINE Uint
-young_gen_usage(Process *p)
+young_gen_usage(Process *p, Uint *ext_msg_usage)
 {
     Uint hsz;
     Eterm *aheap;
@@ -604,7 +604,10 @@ young_gen_usage(Process *p)
                 if (ERTS_SIG_IS_MSG(mp)
                     && mp->data.attached
                     && mp->data.attached != ERTS_MSG_COMBINED_HFRAG) {
-                    hsz += erts_msg_attached_data_size(mp);
+                    Uint sz = erts_msg_attached_data_size(mp);
+                    if (ERTS_SIG_IS_EXTERNAL_MSG(mp))
+                        *ext_msg_usage += sz;
+                    hsz += sz;
                 }
             });
     }
@@ -676,6 +679,7 @@ garbage_collect(Process* p, ErlHeapFragment *live_hf_end,
 {
     Uint reclaimed_now = 0;
     Uint ygen_usage;
+    Uint ext_msg_usage = 0;
     Eterm gc_trace_end_tag;
     int reds;
     ErtsMonotonicTime start_time;
@@ -698,7 +702,7 @@ garbage_collect(Process* p, ErlHeapFragment *live_hf_end,
 	return delay_garbage_collection(p, live_hf_end, need, fcalls);
     }
 
-    ygen_usage = max_young_gen_usage ? max_young_gen_usage : young_gen_usage(p);
+    ygen_usage = max_young_gen_usage ? max_young_gen_usage : young_gen_usage(p, &ext_msg_usage);
 
     if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) {
 	check_for_possibly_long_gc(p, ygen_usage);
@@ -739,7 +743,7 @@ garbage_collect(Process* p, ErlHeapFragment *live_hf_end,
             trace_gc(p, am_gc_minor_start, need, THE_NON_VALUE);
         }
         DTRACE2(gc_minor_start, pidbuf, need);
-        reds = minor_collection(p, live_hf_end, need, objv, nobj,
+        reds = minor_collection(p, live_hf_end, need + ext_msg_usage, objv, nobj,
 				ygen_usage, &reclaimed_now);
         DTRACE2(gc_minor_end, pidbuf, reclaimed_now);
         if (reds == -1) {
@@ -764,7 +768,7 @@ do_major_collection:
             trace_gc(p, am_gc_major_start, need, THE_NON_VALUE);
         }
         DTRACE2(gc_major_start, pidbuf, need);
-        reds = major_collection(p, live_hf_end, need, objv, nobj,
+        reds = major_collection(p, live_hf_end, need + ext_msg_usage, objv, nobj,
 				ygen_usage, &reclaimed_now);
         if (ERTS_SCHEDULER_IS_DIRTY(esdp))
             p->flags &= ~(F_DIRTY_MAJOR_GC|F_DIRTY_MINOR_GC);
@@ -1101,6 +1105,7 @@ erts_garbage_collect_literals(Process* p, Eterm* literals,
     Eterm* old_htop;
     Uint n;
     Uint ygen_usage = 0;
+    Uint ext_msg_usage = 0;
     struct erl_off_heap_header** prev = NULL;
     Sint64 reds;
     int hibernated = !!(p->flags & F_HIBERNATED);
@@ -1118,7 +1123,7 @@ erts_garbage_collect_literals(Process* p, Eterm* literals,
 	p->flags &= ~F_DIRTY_CLA;
     else {
         Uint size = byte_lit_size/sizeof(Uint);
-	ygen_usage = young_gen_usage(p);
+	ygen_usage = young_gen_usage(p, &ext_msg_usage);
         if (hibernated)
             size = size*2 + 3*ygen_usage;
         else
@@ -1130,7 +1135,7 @@ erts_garbage_collect_literals(Process* p, Eterm* literals,
 	}
     }
 
-    reds = (Sint64) garbage_collect(p, ERTS_INVALID_HFRAG_PTR, 0,
+    reds = (Sint64) garbage_collect(p, ERTS_INVALID_HFRAG_PTR, ext_msg_usage,
 				    p->arg_reg, p->arity, fcalls,
 				    ygen_usage);
     if (ERTS_PROC_IS_EXITING(p)) {
@@ -1348,6 +1353,9 @@ minor_collection(Process* p, ErlHeapFragment *live_hf_end,
     Eterm *mature = p->abandoned_heap ? p->abandoned_heap : p->heap;
     Uint mature_size = p->high_water - mature;
     Uint size_before = ygen_usage;
+#ifdef DEBUG
+    Uint debug_tmp = 0;
+#endif
 
     /*
      * Check if we have gone past the max heap size limit
@@ -1484,7 +1492,7 @@ minor_collection(Process* p, ErlHeapFragment *live_hf_end,
            process from there */
         ASSERT(!MAX_HEAP_SIZE_GET(p) ||
                !(MAX_HEAP_SIZE_FLAGS_GET(p) & MAX_HEAP_SIZE_KILL) ||
-               MAX_HEAP_SIZE_GET(p) > (young_gen_usage(p) +
+               MAX_HEAP_SIZE_GET(p) > (young_gen_usage(p, &debug_tmp) +
                                        (OLD_HEND(p) - OLD_HEAP(p)) +
                                        (HEAP_END(p) - HEAP_TOP(p))));
 
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 82d5140d1c..12750b9aa6 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -2417,17 +2417,12 @@ erts_exit_vv(int n, int flush_async, char *fmt, va_list args1, va_list args2)
     erts_exit_epilogue();
 }
 
-void check_obuf(void);
 __decl_noreturn void __noreturn erts_exit_epilogue(void)
 {
     int n = erts_exit_code;
 
     sys_tty_reset(n);
 
-#ifdef DEBUG
-    check_obuf();
-#endif
-
     if (n == ERTS_INTR_EXIT)
 	exit(0);
     else if (n == ERTS_DUMP_EXIT)
diff --git a/erts/emulator/beam/erl_lock_check.c b/erts/emulator/beam/erl_lock_check.c
index 39eabb6710..3aab4828cc 100644
--- a/erts/emulator/beam/erl_lock_check.c
+++ b/erts/emulator/beam/erl_lock_check.c
@@ -164,8 +164,7 @@ static erts_lc_lock_order_t erts_lock_order[] = {
     {	"os_monotonic_time",			NULL			},
     {	"erts_alloc_hard_debug",		NULL			},
     {	"hard_dbg_mseg",		        NULL	                },
-    {	"erts_mmap",				NULL			},
-    {   "sad", NULL}
+    {	"erts_mmap",				NULL			}
 };
 
 #define ERTS_LOCK_ORDER_SIZE \
diff --git a/erts/emulator/beam/erl_message.c b/erts/emulator/beam/erl_message.c
index e350a20339..2a0fb9e2aa 100644
--- a/erts/emulator/beam/erl_message.c
+++ b/erts/emulator/beam/erl_message.c
@@ -1137,10 +1137,28 @@ change_to_off_heap:
     return res;
 }
 
-void erts_factory_proc_init(ErtsHeapFactory* factory,
-			    Process* p)
+void erts_factory_proc_init(ErtsHeapFactory* factory, Process* p)
 {
-    erts_factory_proc_prealloc_init(factory, p, HEAP_LIMIT(p) - HEAP_TOP(p));
+    /* This function does not use HAlloc to allocate on the heap
+       as we do not want to use INIT_HEAP_MEM on the allocated
+       heap as that completely destroys the DEBUG emulators
+       performance. */
+    ErlHeapFragment *bp = p->mbuf;
+    factory->mode     = FACTORY_HALLOC;
+    factory->p        = p;
+    factory->hp_start = HEAP_TOP(p);
+    factory->hp       = factory->hp_start;
+    factory->hp_end   = HEAP_LIMIT(p);
+    factory->off_heap = &p->off_heap;
+    factory->message  = NULL;
+    factory->off_heap_saved.first    = p->off_heap.first;
+    factory->off_heap_saved.overhead = p->off_heap.overhead;
+    factory->heap_frags_saved = bp;
+    factory->heap_frags_saved_used = bp ? bp->used_size : 0;
+    factory->heap_frags = NULL; /* not used */
+    factory->alloc_type = 0; /* not used */
+
+    HEAP_TOP(p) = HEAP_LIMIT(p);
 }
 
 void erts_factory_proc_prealloc_init(ErtsHeapFactory* factory,
diff --git a/erts/emulator/beam/erl_message.h b/erts/emulator/beam/erl_message.h
index e5f623a370..5bd25737a7 100644
--- a/erts/emulator/beam/erl_message.h
+++ b/erts/emulator/beam/erl_message.h
@@ -22,6 +22,7 @@
 #define __ERL_MESSAGE_H__
 
 #include "sys.h"
+#include "erl_vm.h"
 #define ERTS_PROC_SIG_QUEUE_TYPE_ONLY
 #include "erl_proc_sig_queue.h"
 #undef ERTS_PROC_SIG_QUEUE_TYPE_ONLY
@@ -117,6 +118,7 @@ erts_produce_heap(ErtsHeapFactory* factory, Uint need, Uint xtra)
     }
     res = factory->hp;
     factory->hp += need;
+    INIT_HEAP_MEM(res, need);
     return res;
 }
 
diff --git a/erts/emulator/beam/erl_node_tables.c b/erts/emulator/beam/erl_node_tables.c
index 215dc6fa71..49dea8919b 100644
--- a/erts/emulator/beam/erl_node_tables.c
+++ b/erts/emulator/beam/erl_node_tables.c
@@ -2295,7 +2295,7 @@ reference_table_term(Uint **hpp, ErlOffHeap *ohp, Uint *szp)
                 tup = MK_2TUP(AM_ets, drp->id);
             }
 	    else {
-		ASSERT(!drp->ctrl_ref && drp->node_ref && !drp->signal_ref);
+		ASSERT(!drp->ctrl_ref && (drp->node_ref || drp->sequence_ref) && !drp->signal_ref);
 		ASSERT(is_atom(drp->id));
 		tup = MK_2TUP(drp->id, MK_UINT(drp->creation));
 		tup = MK_2TUP(AM_node, tup);
diff --git a/erts/emulator/beam/erl_proc_sig_queue.c b/erts/emulator/beam/erl_proc_sig_queue.c
index bd59c4afa3..aae976ccb9 100644
--- a/erts/emulator/beam/erl_proc_sig_queue.c
+++ b/erts/emulator/beam/erl_proc_sig_queue.c
@@ -611,7 +611,8 @@ proc_queue_signal(Process *c_p, Eterm pid, ErtsSignal *sig, int op)
 #endif
                 return 1;
             }
-            ASSERT(esdp->pending_signal.dbg_from == esdp->current_process);
+            ASSERT(esdp->pending_signal.dbg_from == esdp->current_process ||
+                   esdp->pending_signal.dbg_from == esdp->free_process);
             if (pend_sig != sig) {
                 /* Switch them and send previously pending signal instead */
                 Eterm pend_to = esdp->pending_signal.to;
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index f34289339f..9e662632b4 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -12090,9 +12090,11 @@ erts_proc_exit_handle_dist_monitor(ErtsMonitor *mon, void *vctxt, Sint reds)
     ErtsDSigSendContext ctx;
     ErtsMonLnkDist *dist;
     DistEntry *dep;
-    Eterm watcher;
+    Eterm watcher, ref, *hp;
     ErtsMonitorData *mdp = NULL;
     Eterm watched;
+    Uint watcher_sz, ref_sz;
+    ErtsHeapFactory factory;
 
     ASSERT(erts_monitor_is_target(mon) && mon->type == ERTS_MON_TYPE_DIST_PROC);
 
@@ -12124,10 +12126,18 @@ erts_proc_exit_handle_dist_monitor(ErtsMonitor *mon, void *vctxt, Sint reds)
     case ERTS_DSIG_PREP_CONNECTED:
         if (dist->connection_id != ctx.connection_id)
             break;
+        erts_factory_proc_init(&factory, c_p);
+        watcher_sz = size_object(watcher);
+        hp = erts_produce_heap(&factory, watcher_sz, 0);
+        watcher = copy_struct(watcher, watcher_sz, &hp, factory.off_heap);
+        ref_sz = size_object(mdp->ref);
+        hp = erts_produce_heap(&factory, ref_sz, 0);
+        ref = copy_struct(mdp->ref, ref_sz, &hp, factory.off_heap);
+        erts_factory_close(&factory);
         code = erts_dsig_send_m_exit(&ctx,
                                      watcher,
                                      watched,
-                                     mdp->ref,
+                                     ref,
                                      reason);
         switch (code) {
         case ERTS_DSIG_SEND_CONTINUE:
@@ -12332,13 +12342,15 @@ erts_proc_exit_handle_dist_link(ErtsLink *lnk, void *vctxt, Sint reds)
 {
     ErtsProcExitContext *ctxt = (ErtsProcExitContext *) vctxt;
     Process *c_p = ctxt->c_p;
-    Eterm reason = ctxt->reason;
+    Eterm reason = ctxt->reason, item, *hp;
+    Uint item_sz;
     int code;
     ErtsDSigSendContext ctx;
     ErtsMonLnkDist *dist;
     DistEntry *dep;
     ErtsLink *dlnk;
     ErtsLinkData *ldp = NULL;
+    ErtsHeapFactory factory;
 
     ASSERT(lnk->type == ERTS_LNK_TYPE_DIST_PROC);
     dlnk = erts_link_to_other(lnk, &ldp);
@@ -12365,9 +12377,14 @@ erts_proc_exit_handle_dist_link(ErtsLink *lnk, void *vctxt, Sint reds)
     case ERTS_DSIG_PREP_CONNECTED:
         if (dist->connection_id != ctx.connection_id)
             break;
+        erts_factory_proc_init(&factory, c_p);
+        item_sz = size_object(lnk->other.item);
+        hp = erts_produce_heap(&factory, item_sz, 0);
+        item = copy_struct(lnk->other.item, item_sz, &hp, factory.off_heap);
+        erts_factory_close(&factory);
         code = erts_dsig_send_exit_tt(&ctx,
                                       c_p->common.id,
-                                      lnk->other.item,
+                                      item,
                                       reason,
                                       SEQ_TRACE_TOKEN(c_p));
         switch (code) {
@@ -12584,6 +12601,8 @@ erts_continue_exit_process(Process *p)
 
     if (p->u.terminate) {
         trap_state = p->u.terminate;
+        /* Re-set the reason as it may have been gc:ed */
+        trap_state->reason = p->fvalue;
     } else {
         trap_state->phase = ERTS_CONTINUE_EXIT_TIMERS;
         trap_state->reason = p->fvalue;
@@ -12661,11 +12680,11 @@ restart:
             p->flags &= ~F_USING_DB;
         }
 
-        erts_set_gc_state(p, 1);
-
         trap_state->phase = ERTS_CONTINUE_EXIT_CLEAN_SYS_TASKS;
     case ERTS_CONTINUE_EXIT_CLEAN_SYS_TASKS:
-        
+
+        /* We enable GC again as it can produce more sys-tasks */
+        erts_set_gc_state(p, 1);
         state = erts_atomic32_read_acqb(&p->state);
         if ((state & ERTS_PSFLG_SYS_TASKS) || p->dirty_sys_tasks) {
             reds -= cleanup_sys_tasks(p, state, reds);
@@ -12788,6 +12807,9 @@ restart:
             erts_deref_dist_entry(trap_state->dep);
         }
 
+        /* Disable GC so that reason does not get moved */
+        erts_set_gc_state(p, 0);
+
         trap_state->pectxt.c_p = p;
         trap_state->pectxt.reason = trap_state->reason;
         trap_state->pectxt.dist_links = NULL;
@@ -12872,13 +12894,13 @@ restart:
             switch (result) {
             case ERTS_DSIG_SEND_OK:
             case ERTS_DSIG_SEND_TOO_LRG: /*SEND_SYSTEM_LIMIT*/
-            case ERTS_DSIG_SEND_YIELD: /*SEND_YIELD_RETURN*/
                 break;
+            case ERTS_DSIG_SEND_YIELD: /*SEND_YIELD_RETURN*/
             case ERTS_DSIG_SEND_CONTINUE: { /*SEND_YIELD_CONTINUE*/
                 goto yield;
             }
             }
-            erts_set_gc_state(p, 1);
+
             trap_state->pectxt.dist_state = NIL;
             if (reds <= 0)
                 goto yield;
@@ -12917,11 +12939,12 @@ restart:
          * From this point on we are no longer allowed to yield
          * this process.
          */
-
 #ifdef DEBUG
         yield_allowed = 0;
 #endif
 
+        erts_set_gc_state(p, 1);
+
         /* Set state to not active as we don't want this process
            to be scheduled in again after this. */
         state = erts_atomic32_read_band_relb(&p->state,
@@ -12960,7 +12983,7 @@ restart:
         erts_free(ERTS_ALC_T_CONT_EXIT_TRAP, trap_state);
         p->u.terminate = NULL;
     }
-    
+
     ERTS_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p);
 
     if (IS_TRACED_FL(p, F_TRACE_SCHED_EXIT))
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index 4ffa022d5c..711b73417d 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -1322,9 +1322,6 @@ ERTS_GLB_INLINE void erts_heap_frag_shrink(Process* p, Eterm* hp)
 #endif /* inline */
 
 Eterm* erts_heap_alloc(Process* p, Uint need, Uint xtra);
-#ifdef CHECK_FOR_HOLES
-Eterm* erts_set_hole_marker(Eterm* ptr, Uint sz);
-#endif
 
 extern erts_rwmtx_t erts_cpu_bind_rwmtx;
 /* If any of the erts_system_monitor_* variables are set (enabled),
diff --git a/erts/emulator/beam/erl_process_dump.c b/erts/emulator/beam/erl_process_dump.c
index a164ed543e..71262061dd 100644
--- a/erts/emulator/beam/erl_process_dump.c
+++ b/erts/emulator/beam/erl_process_dump.c
@@ -121,12 +121,14 @@ Uint erts_process_memory(Process *p, int include_sigs_in_transit)
 
     size += sizeof(Process);
 
-    erts_link_tree_foreach(ERTS_P_LINKS(p),
-                           link_size, (void *) &size);
-    erts_monitor_tree_foreach(ERTS_P_MONITORS(p),
-                              monitor_size, (void *) &size);
-    erts_monitor_list_foreach(ERTS_P_LT_MONITORS(p),
-                              monitor_size, (void *) &size);
+    if ((erts_atomic32_read_nob(&p->state) & ERTS_PSFLG_EXITING) == 0) {
+        erts_link_tree_foreach(ERTS_P_LINKS(p),
+                               link_size, (void *) &size);
+        erts_monitor_tree_foreach(ERTS_P_MONITORS(p),
+                                  monitor_size, (void *) &size);
+        erts_monitor_list_foreach(ERTS_P_LT_MONITORS(p),
+                                  monitor_size, (void *) &size);
+    }
     size += (p->heap_sz + p->mbuf_sz) * sizeof(Eterm);
     if (p->abandoned_heap)
         size += (p->hend - p->heap) * sizeof(Eterm);
diff --git a/erts/emulator/beam/erl_vm.h b/erts/emulator/beam/erl_vm.h
index 35eae18394..e623148587 100644
--- a/erts/emulator/beam/erl_vm.h
+++ b/erts/emulator/beam/erl_vm.h
@@ -67,9 +67,10 @@
                  (unsigned long)HEAP_TOP(p),(sz),__FILE__,__LINE__)),   \
  */
 #  ifdef CHECK_FOR_HOLES
-#    define INIT_HEAP_MEM(p,sz) erts_set_hole_marker(HEAP_TOP(p), (sz))
+Eterm* erts_set_hole_marker(Eterm* ptr, Uint sz);
+#    define INIT_HEAP_MEM(p,sz) erts_set_hole_marker(p, (sz))
 #  else
-#    define INIT_HEAP_MEM(p,sz) sys_memset(HEAP_TOP(p),0x01,(sz)*sizeof(Eterm*))
+#    define INIT_HEAP_MEM(p,sz) sys_memset(p,0x01,(sz)*sizeof(Eterm*))
 #  endif
 #else
 #  define INIT_HEAP_MEM(p,sz) ((void)0)
@@ -91,7 +92,7 @@
      ErtsHAllocLockCheck(p),					      \
      (IS_FORCE_HEAP_FRAGS || (((HEAP_LIMIT(p) - HEAP_TOP(p)) < (sz))) \
       ? erts_heap_alloc((p),(sz),(xtra))                              \
-      : (INIT_HEAP_MEM(p,sz),		                              \
+      : (INIT_HEAP_MEM(HEAP_TOP(p),sz),                               \
          HEAP_TOP(p) = HEAP_TOP(p) + (sz), HEAP_TOP(p) - (sz))))
 
 #define HAlloc(P, SZ) HAllocX(P,SZ,0)
diff --git a/erts/emulator/sys/common/erl_poll.c b/erts/emulator/sys/common/erl_poll.c
index c71d23f58c..9662996039 100644
--- a/erts/emulator/sys/common/erl_poll.c
+++ b/erts/emulator/sys/common/erl_poll.c
@@ -2354,6 +2354,7 @@ uint32_t epoll_events(int kp_fd, int fd)
             fprintf(stderr,"failed to parse file %s on line %d, errno = %d\n", fname,
                     line,
                     errno);
+            fclose(f);
             return 0;
         }
         if (fd == ev_fd) {
@@ -2408,6 +2409,7 @@ ERTS_POLL_EXPORT(erts_poll_get_selected_events)(ErtsPollSet *ps,
     if (fscanf(f,"pos:\t%x\nflags:\t%x", &pos, &flags) != 2) {
         fprintf(stderr,"failed to parse file %s, errno = %d\n", fname, errno);
         ASSERT(0);
+        fclose(f);
         return;
     }
     if (fscanf(f,"\nmnt_id:\t%x\n", &mnt_id));
@@ -2422,6 +2424,7 @@ ERTS_POLL_EXPORT(erts_poll_get_selected_events)(ErtsPollSet *ps,
             fprintf(stderr,"failed to parse file %s on line %d, errno = %d\n",
                     fname, line, errno);
             ASSERT(0);
+            fclose(f);
             return;
         }
         if (fd == ps->wake_fds[0] || fd == ps->wake_fds[1])
@@ -2437,6 +2440,7 @@ ERTS_POLL_EXPORT(erts_poll_get_selected_events)(ErtsPollSet *ps,
         ev[fd] = (ERTS_POLL_EV_IN|ERTS_POLL_EV_OUT) & ERTS_POLL_EV_N2E(events);
         line++;
     }
+    fclose(f);
 #else
     for (fd = 0; fd < len; fd++)
         ev[fd] = ERTS_POLL_EV_NONE;
diff --git a/erts/emulator/test/distribution_SUITE.erl b/erts/emulator/test/distribution_SUITE.erl
index 4f70b51aa0..449821e5ad 100644
--- a/erts/emulator/test/distribution_SUITE.erl
+++ b/erts/emulator/test/distribution_SUITE.erl
@@ -744,6 +744,7 @@ link_to_dead_new_node(Config) when is_list(Config) ->
         {'EXIT', Pid, noproc} ->
             ok;
         Other ->
+            stop_node(Node),
             ct:fail({unexpected_message, Other})
     after 5000 ->
               ct:fail(nothing_received)
@@ -1421,7 +1422,7 @@ message_latency_large_exit(Nodename, ReasonFun) ->
 
               FlushTrace = fun F() ->
                                    receive
-                                       {trace, Pid, _, _} = M ->
+                                       {trace, Pid, _, _} ->
                                            F()
                                    after 0 ->
                                            ok
@@ -1455,8 +1456,14 @@ measure_latency_large_message(Nodename, DataFun) ->
 
     Echo = spawn(N, fun F() -> receive {From, Msg} -> From ! Msg, F() end end),
 
-    %% Test 32 MB and 320 MB and test the latency difference of sent messages
-    Payloads = [{I, <<0:(I * 32 * 1024 * 1024 * 8)>>} || I <- [1,10]],
+    case erlang:system_info(build_type) of
+        debug ->
+            %% Test 3.2 MB and 32 MB and test the latency difference of sent messages
+            Payloads = [{I, <<0:(I * 32 * 1024 * 8)>>} || I <- [1,10]];
+        _ ->
+            %% Test 32 MB and 320 MB and test the latency difference of sent messages
+            Payloads = [{I, <<0:(I * 32 * 1024 * 1024 * 8)>>} || I <- [1,10]]
+    end,
 
     IndexTimes = [{I, measure_latency(DataFun, Dropper, Echo, P)}
                   || {I, P} <- Payloads],
@@ -1465,6 +1472,8 @@ measure_latency_large_message(Nodename, DataFun) ->
 
     ct:pal("~p",[IndexTimes]),
 
+    stop_node(N),
+
     case {lists:max(Times), lists:min(Times)} of
         {Max, Min} when Max * 0.25 > Min ->
             ct:fail({incorrect_latency, IndexTimes});
@@ -1487,7 +1496,7 @@ measure_latency(DataFun, Dropper, Echo, Payload) ->
                  end) || _ <- lists:seq(1,2)],
 
     [receive
-         {monitor, _Sender, busy_dist_port, _Info} = M ->
+         {monitor, _Sender, busy_dist_port, _Info} ->
              ok
      end || _ <- lists:seq(1,10)],
 
@@ -1733,7 +1742,7 @@ bad_dist_fragments(Config) when is_list(Config) ->
 
     start_monitor(Offender,P),
     Exit2Victim = spawn(Victim, fun() -> receive ok -> ok end end),
-    send_bad_fragments(Offender, Victim, P,{?DOP_PAYLOAD_EXIT2,P,ExitVictim},2,
+    send_bad_fragments(Offender, Victim, P,{?DOP_PAYLOAD_EXIT2,P,Exit2Victim},2,
                       [{hdr, 1, [132]}]),
 
     start_monitor(Offender,P),
@@ -2428,17 +2437,22 @@ stop_node(Node) ->
 verify_nc(Node) ->
     P = self(),
     Ref = make_ref(),
-    spawn(Node,
-          fun() ->
-                  R = erts_test_utils:check_node_dist(fun(E) -> E end),
-                  P ! {Ref, R}
-          end),
+    Pid = spawn(Node,
+                fun() ->
+                        R = erts_test_utils:check_node_dist(fun(E) -> E end),
+                        P ! {Ref, R}
+                end),
+    MonRef = monitor(process, Pid),
     receive
         {Ref, ok} ->
+            demonitor(MonRef,[flush]),
             ok;
         {Ref, Error} ->
-            ct:log("~s",[Error]),
-            ct:fail(failed_nc_refc_check)
+            ct:log("~p",[Error]),
+            ct:fail(failed_nc_refc_check);
+        {'DOWN', MonRef, _, _, _} = Down ->
+            ct:log("~p",[Down]),
+            ct:fail(crashed_nc_refc_check)
     end.
 
 freeze_node(Node, MS) ->
diff --git a/erts/emulator/test/dump_SUITE.erl b/erts/emulator/test/dump_SUITE.erl
index d0237b78cc..3b860ebdf6 100644
--- a/erts/emulator/test/dump_SUITE.erl
+++ b/erts/emulator/test/dump_SUITE.erl
@@ -24,7 +24,7 @@
 
 -export([all/0, suite/0, init_per_testcase/2, end_per_testcase/2]).
 
--export([signal_abort/1]).
+-export([signal_abort/1, exiting_dump/1, free_dump/1]).
 
 -export([load/0]).
 
@@ -35,7 +35,7 @@ suite() ->
      {timetrap, {minutes, 2}}].
 
 all() ->
-    [signal_abort].
+    [signal_abort, exiting_dump, free_dump].
 
 init_per_testcase(signal_abort, Config) ->
     SO = erlang:system_info(schedulers_online),
@@ -48,7 +48,10 @@ init_per_testcase(signal_abort, Config) ->
             {skip, "the platform does not support scheduler dump"};
        Dump ->
             Config
-    end.
+    end;
+init_per_testcase(_, Config) ->
+    Config.
+
 
 end_per_testcase(_, Config) ->
     Config.
@@ -79,8 +82,6 @@ signal_abort(Config) ->
 
     {ok, Bin} = get_dump_when_done(Dump),
 
-    ct:log("~s",[Bin]),
-
     {match, Matches} = re:run(Bin,"Current Process: <",[global]),
 
     ct:log("Found ~p",[Matches]),
@@ -91,6 +92,85 @@ signal_abort(Config) ->
 
     ok.
 
+load() ->
+    lists:seq(1,10000),
+    load().
+
+
+%% Test that crash dumping when a process is in the state EXITING works
+exiting_dump(Config) when is_list(Config) ->
+    Dump = filename:join(proplists:get_value(priv_dir, Config),"signal_abort.dump"),
+
+    {ok, Node} = start_node(Config),
+
+    Self = self(),
+
+    Pid = spawn_link(Node,
+                     fun() ->
+                             [begin
+                                  T = ets:new(hej,[]),
+                                  [ets:insert(T,{I,I}) || I <- lists:seq(1,1000)]
+                              end || _ <- lists:seq(1,1000)],
+                             Self ! ready,
+                             receive ok -> ok end
+                     end),
+
+    true = rpc:call(Node, os, putenv, ["ERL_CRASH_DUMP",Dump]),
+
+    receive ready -> unlink(Pid), Pid ! ok end,
+
+    rpc:call(Node, erlang, halt, ["dump"]),
+
+    {ok, Bin} = get_dump_when_done(Dump),
+
+    {match, Matches} = re:run(Bin,"^State: Exiting", [global, multiline]),
+
+    ct:log("Found ~p",[Matches]),
+
+    true = length(Matches) == 1,
+
+    file:delete(Dump),
+
+    ok.
+
+%% Test that crash dumping when a process is in the state FREE works
+free_dump(Config) when is_list(Config) ->
+    Dump = filename:join(proplists:get_value(priv_dir, Config),"signal_abort.dump"),
+
+    {ok, Node} = start_node(Config),
+
+    Self = self(),
+
+    Pid = spawn_link(Node,
+                     fun() ->
+                             Self ! ready,
+                             receive
+                                 ok ->
+                                     unlink(Self),
+                                     exit(lists:duplicate(1000,1000))
+                             end
+                     end),
+
+    true = rpc:call(Node, os, putenv, ["ERL_CRASH_DUMP",Dump]),
+
+    [erlang:monitor(process, Pid) || _ <- lists:seq(1,10000)],
+    receive ready -> unlink(Pid), Pid ! ok end,
+
+    rpc:call(Node, erlang, halt, ["dump"]),
+
+    {ok, Bin} = get_dump_when_done(Dump),
+
+    {match, Matches} = re:run(Bin,"^State: Non Existing", [global, multiline]),
+
+    ct:log("Found ~p",[Matches]),
+
+    true = length(Matches) == 1,
+
+    file:delete(Dump),
+
+    ok.
+
+
 get_dump_when_done(Dump) ->
     case file:read_file_info(Dump) of
         {ok, #file_info{ size = Sz }} ->
@@ -104,15 +184,13 @@ get_dump_when_done(Dump, Sz) ->
     timer:sleep(1000),
     case file:read_file_info(Dump) of
         {ok, #file_info{ size = Sz }} ->
-            file:read_file(Dump);
+            {ok, Bin} = file:read_file(Dump),
+            ct:log("~s",[Bin]),
+            {ok, Bin};
         {ok, #file_info{ size = NewSz }} ->
             get_dump_when_done(Dump, NewSz)
     end.
 
-load() ->
-    lists:seq(1,10000),
-    load().
-
 start_node(Config) when is_list(Config) ->
     Pa = filename:dirname(code:which(?MODULE)),
     Name = list_to_atom(atom_to_list(?MODULE)
diff --git a/erts/emulator/test/efile_SUITE.erl b/erts/emulator/test/efile_SUITE.erl
index 7dcf302742..55c5343739 100644
--- a/erts/emulator/test/efile_SUITE.erl
+++ b/erts/emulator/test/efile_SUITE.erl
@@ -45,7 +45,12 @@ iter_max_files(Config) when is_list(Config) ->
 iter_max_files_1(Config) ->
     DataDir = proplists:get_value(data_dir,Config),
     TestFile = filename:join(DataDir, "existing_file"),
-    N = 10,
+    case erlang:system_info(debug_compiled) of
+        true ->
+            N = 5;
+        false ->
+            N = 10
+    end,
     %% Run on a different node in order to make the test more stable.
     Dir = filename:dirname(code:which(?MODULE)),
     {ok,Node} = test_server:start_node(test_iter_max_files,slave,
diff --git a/erts/emulator/test/erts_test_utils.erl b/erts/emulator/test/erts_test_utils.erl
index 0c3ef3e0fc..e4e00a0a16 100644
--- a/erts/emulator/test/erts_test_utils.erl
+++ b/erts/emulator/test/erts_test_utils.erl
@@ -19,6 +19,7 @@
 %%
 
 -module(erts_test_utils).
+-compile(r16).
 
 %%
 %% THIS MODULE IS ALSO USED BY *OTHER* APPLICATIONS TEST CODE
diff --git a/erts/emulator/test/fun_SUITE.erl b/erts/emulator/test/fun_SUITE.erl
index 4042b58ff2..7f6caa08f1 100644
--- a/erts/emulator/test/fun_SUITE.erl
+++ b/erts/emulator/test/fun_SUITE.erl
@@ -592,7 +592,8 @@ refc_dist(Config) when is_list(Config) ->
     3 = fun_refc(F2),
     true = erlang:garbage_collect(),
     2 = fun_refc(F),
-    refc_dist_send(Node, F).
+    refc_dist_send(Node, F),
+    test_server:stop_node(Node).
 
 refc_dist_send(Node, F) ->
     Pid = spawn_link(Node, fun() -> receive
@@ -682,6 +683,7 @@ t_arity(Config) when is_list(Config) ->
     43 = spawn_call(Node, fun(X, Y) -> A+X+Y end),
     1 = spawn_call(Node, fun(X, Y) -> X+Y end),
     45 = spawn_call(Node, fun(X, Y, Z) -> A+X+Y+Z end),
+    test_server:stop_node(Node),
     ok.
 
 t_is_function2(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl
index edf08ce0bd..c698220013 100644
--- a/erts/emulator/test/process_SUITE.erl
+++ b/erts/emulator/test/process_SUITE.erl
@@ -133,6 +133,15 @@ init_per_group(_GroupName, Config) ->
 end_per_group(_GroupName, Config) ->
     Config.
 
+init_per_testcase(Func, Config)
+  when Func =:= processes_default_tab;
+       Func =:= processes_this_tab ->
+    case erlang:system_info(debug_compiled) of
+        true ->
+            {skip, "Don't run in debug"};
+        false ->
+            [{testcase, Func} | Config]
+    end;
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     [{testcase, Func}|Config].
 
diff --git a/erts/etc/unix/etp-commands.in b/erts/etc/unix/etp-commands.in
index e8dc59156f..dc28107ef5 100644
--- a/erts/etc/unix/etp-commands.in
+++ b/erts/etc/unix/etp-commands.in
@@ -1453,8 +1453,10 @@ define etp-stack-preamble
   set $etp_stack_p = ($arg0)->stop
   set $etp_stack_end = ($arg0)->hend
   printf "%% Stacktrace (%u)\n", $etp_stack_end-$etp_stack_p
-  etp-1 ((Eterm)($arg0)->i) 0
-  printf "  (I)\n"
+  if ($arg0)->i != 0
+    etp-1 ((Eterm)($arg0)->i) 0
+    printf "  (I)\n"
+  end
   if ($arg0)->cp != 0
     etp-1 ((Eterm)($arg0)->cp) 0
     printf "  (cp)\n"
diff --git a/lib/common_test/test_server/configure.in b/lib/common_test/test_server/configure.in
index e07bd4c2aa..a32d050081 100644
--- a/lib/common_test/test_server/configure.in
+++ b/lib/common_test/test_server/configure.in
@@ -171,7 +171,7 @@ case $system in
 	fi
 	SHLIB_EXTRACT_ALL=""
 	;;
-    *-openbsd*)
+    *-openbsd*|*-netbsd*|*-freebsd*|*-dragonfly*)
 	# Not available on all versions:  check for include file.
 	AC_CHECK_HEADER(dlfcn.h, [
 	    SHLIB_CFLAGS="-fpic"
@@ -194,29 +194,6 @@ case $system in
 	])
 	SHLIB_EXTRACT_ALL=""
 	;;
-    *-netbsd*|*-freebsd*|*-dragonfly*)
-	# Not available on all versions:  check for include file.
-	AC_CHECK_HEADER(dlfcn.h, [
-	    SHLIB_CFLAGS="-fpic"
-	    SHLIB_LD="ld"
-	    SHLIB_LDFLAGS="$LDFLAGS -Bshareable -x"
-	    SHLIB_SUFFIX=".so"
-	    if test X${enable_m64_build} = Xyes; then
-	        AC_MSG_ERROR(don't know how to link 64-bit dynamic drivers)
-	    fi
-	    if test X${enable_m32_build} = Xyes; then
-	        AC_MSG_ERROR(don't know how to link 32-bit dynamic drivers)
-	    fi
-	], [
-	    # No dynamic loading.
-	    SHLIB_CFLAGS=""
-	    SHLIB_LD="ld"
-	    SHLIB_LDFLAGS=""
-	    SHLIB_SUFFIX=""
-	    AC_MSG_ERROR(don't know how to compile and link dynamic drivers)
-	])
-	SHLIB_EXTRACT_ALL=""
-	;;
     *-solaris2*|*-sysv4*)
 	SHLIB_CFLAGS="-KPIC"
 	SHLIB_LD="/usr/ccs/bin/ld"
diff --git a/lib/kernel/test/code_SUITE.erl b/lib/kernel/test/code_SUITE.erl
index 99fecbe970..4f0847084f 100644
--- a/lib/kernel/test/code_SUITE.erl
+++ b/lib/kernel/test/code_SUITE.erl
@@ -25,8 +25,8 @@
 -export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2]).
 -export([set_path/1, get_path/1, add_path/1, add_paths/1, del_path/1,
 	 replace_path/1, load_file/1, load_abs/1, ensure_loaded/1,
-	 delete/1, purge/1, purge_many_exits/1, soft_purge/1, is_loaded/1,
-	 all_loaded/1,
+	 delete/1, purge/1, purge_many_exits/0, purge_many_exits/1,
+         soft_purge/1, is_loaded/1, all_loaded/1,
 	 load_binary/1, dir_req/1, object_code/1, set_path_file/1,
 	 upgrade/1,
 	 sticky_dir/1, pa_pz_option/1, add_del_path/1,
@@ -55,7 +55,7 @@
 
 suite() ->
     [{ct_hooks,[ts_install_cth]},
-     {timetrap,{minutes,5}}].
+     {timetrap,{seconds,30}}].
 
 all() ->
     [set_path, get_path, add_path, add_paths, del_path,
@@ -396,6 +396,9 @@ purge(Config) when is_list(Config) ->
     process_flag(trap_exit, OldFlag),
     ok.
 
+purge_many_exits() ->
+    [{timetrap, {minutes, 2}}].
+
 purge_many_exits(Config) when is_list(Config) ->
     OldFlag = process_flag(trap_exit, true),
 
diff --git a/lib/observer/test/observer_SUITE.erl b/lib/observer/test/observer_SUITE.erl
index 75336cedcc..7d54bb9b3b 100644
--- a/lib/observer/test/observer_SUITE.erl
+++ b/lib/observer/test/observer_SUITE.erl
@@ -41,7 +41,8 @@
 %% Default timetrap timeout (set in init_per_testcase)
 -define(default_timeout, ?t:minutes(2)).
 
-suite() -> [{ct_hooks,[ts_install_cth]}].
+suite() -> [{timetrap, {minutes, 5}},
+            {ct_hooks,[ts_install_cth]}].
 
 all() ->
     [app_file, appup_file, {group, gui}].
diff --git a/lib/wx/src/Makefile b/lib/wx/src/Makefile
index 21b45af2c4..52f4008e0a 100644
--- a/lib/wx/src/Makefile
+++ b/lib/wx/src/Makefile
@@ -111,10 +111,10 @@ $(APPUP_TARGET): $(APPUP_SRC) ../vsn.mk Makefile
 
 # Rules
 $(EBIN)/%.beam: $(ESRC)/%.erl $(HEADER_FILES)
-	$(V_ERLC) -W -bbeam $(ERL_FLAGS) $(ERL_COMPILE_FLAGS) -o$(EBIN) $<
+	$(V_ERLC) -W -bbeam $(ERL_COMPILE_FLAGS) -o$(EBIN) $<
 
 $(EBIN)/%.beam: $(EGEN)/%.erl $(HEADER_FILES)
-	$(V_ERLC) -W -bbeam $(ERL_FLAGS) $(ERL_COMPILE_FLAGS) -o$(EBIN) $<
+	$(V_ERLC) -W -bbeam $(ERL_COMPILE_FLAGS) -o$(EBIN) $<
 
 # ----------------------------------------------------
 # Release Target
diff --git a/system/doc/design_principles/statem.xml b/system/doc/design_principles/statem.xml
index 45ea972ff2..23e9054547 100644
--- a/system/doc/design_principles/statem.xml
+++ b/system/doc/design_principles/statem.xml
@@ -759,7 +759,7 @@ StateName(EventType, EventContent, Data) ->
     <p>
       Since the <em>state enter call</em> is not an event there are restrictions
       on the allowed return value and
-      <seealso marker="#State Transition Actions">State Transition Actions</seealso>.
+      <seealso marker="#Transition Actions">State Transition Actions</seealso>.
       You may not change the state,
       <seealso marker="#Postponing Events">postpone</seealso>
       this non-event, or