4 files changed, 27 insertions, 9 deletions
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_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_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)