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authorRickard Green <rickard@erlang.org>2015-08-26 19:47:10 +0200
committerRickard Green <rickard@erlang.org>2015-11-12 15:25:47 +0100
commitb21b604137c5cb5f5039a40994e429871e5b707b (patch)
tree9dacd474126fd82c022c5fb7881c3c9b685324ef /erts/emulator/beam/copy.c
parent7858ca939f8bf2db918396616fee13364d150a1e (diff)
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Introduce literal tag
Diffstat (limited to 'erts/emulator/beam/copy.c')
-rw-r--r--erts/emulator/beam/copy.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/erts/emulator/beam/copy.c b/erts/emulator/beam/copy.c
index ec769c3b49..b185758b1d 100644
--- a/erts/emulator/beam/copy.c
+++ b/erts/emulator/beam/copy.c
@@ -35,7 +35,7 @@
#include "erl_bits.h"
#include "dtrace-wrapper.h"
-static void move_one_frag(Eterm** hpp, ErlHeapFragment*, ErlOffHeap*);
+static void move_one_frag(Eterm** hpp, ErlHeapFragment*, ErlOffHeap*, int);
/*
* Copy object "obj" to process p.
@@ -621,17 +621,24 @@ Eterm copy_shallow(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
* move markers.
* Typically used to copy a multi-fragmented message (from NIF).
*/
-void move_multi_frags(Eterm** hpp, ErlOffHeap* off_heap, ErlHeapFragment* first,
- Eterm* refs, unsigned nrefs)
+void erts_move_multi_frags(Eterm** hpp, ErlOffHeap* off_heap, ErlHeapFragment* first,
+ Eterm* refs, unsigned nrefs, int literals)
{
ErlHeapFragment* bp;
Eterm* hp_start = *hpp;
Eterm* hp_end;
Eterm* hp;
unsigned i;
+ Eterm literal_tag;
+
+#ifdef TAG_LITERAL_PTR
+ literal_tag = (Eterm) literals ? TAG_LITERAL_PTR : 0;
+#else
+ literal_tag = (Eterm) 0;
+#endif
for (bp=first; bp!=NULL; bp=bp->next) {
- move_one_frag(hpp, bp, off_heap);
+ move_one_frag(hpp, bp, off_heap, literals);
}
hp_end = *hpp;
for (hp=hp_start; hp<hp_end; ++hp) {
@@ -644,6 +651,9 @@ void move_multi_frags(Eterm** hpp, ErlOffHeap* off_heap, ErlHeapFragment* first,
val = *ptr;
if (IS_MOVED_BOXED(val)) {
ASSERT(is_boxed(val));
+#ifdef TAG_LITERAL_PTR
+ val |= literal_tag;
+#endif
*hp = val;
}
break;
@@ -651,7 +661,11 @@ void move_multi_frags(Eterm** hpp, ErlOffHeap* off_heap, ErlHeapFragment* first,
ptr = list_val(gval);
val = *ptr;
if (IS_MOVED_CONS(val)) {
- *hp = ptr[1];
+ val = ptr[1];
+#ifdef TAG_LITERAL_PTR
+ val |= literal_tag;
+#endif
+ *hp = val;
}
break;
case TAG_PRIMARY_HEADER:
@@ -662,12 +676,12 @@ void move_multi_frags(Eterm** hpp, ErlOffHeap* off_heap, ErlHeapFragment* first,
}
}
for (i=0; i<nrefs; ++i) {
- refs[i] = follow_moved(refs[i]);
+ refs[i] = follow_moved(refs[i], literal_tag);
}
}
static void
-move_one_frag(Eterm** hpp, ErlHeapFragment* frag, ErlOffHeap* off_heap)
+move_one_frag(Eterm** hpp, ErlHeapFragment* frag, ErlOffHeap* off_heap, int literals)
{
Eterm* ptr = frag->mem;
Eterm* end = ptr + frag->used_size;
@@ -704,4 +718,3 @@ move_one_frag(Eterm** hpp, ErlHeapFragment* frag, ErlOffHeap* off_heap)
OH_OVERHEAD(off_heap, frag->off_heap.overhead);
frag->off_heap.first = NULL;
}
-