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Diffstat (limited to 'erts/emulator/beam/copy.c')
-rw-r--r--erts/emulator/beam/copy.c148
1 files changed, 109 insertions, 39 deletions
diff --git a/erts/emulator/beam/copy.c b/erts/emulator/beam/copy.c
index de68adbeb6..e567eabc82 100644
--- a/erts/emulator/beam/copy.c
+++ b/erts/emulator/beam/copy.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 1996-2017. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -40,7 +40,8 @@ static void move_one_frag(Eterm** hpp, ErlHeapFragment*, ErlOffHeap*, int);
/*
* Copy object "obj" to process p.
*/
-Eterm copy_object_x(Eterm obj, Process* to, Uint extra) {
+Eterm copy_object_x(Eterm obj, Process* to, Uint extra)
+{
if (!is_immed(obj)) {
Uint size = size_object(obj);
Eterm* hp = HAllocX(to, size, extra);
@@ -70,33 +71,46 @@ Eterm copy_object_x(Eterm obj, Process* to, Uint extra) {
* Return the "flat" size of the object.
*/
-Uint size_object(Eterm obj)
+#define in_literal_purge_area(PTR) \
+ (lit_purge_ptr && ( \
+ (lit_purge_ptr <= (PTR) && \
+ (PTR) < (lit_purge_ptr + lit_purge_sz))))
+
+Uint size_object_x(Eterm obj, erts_literal_area_t *litopt)
{
Uint sum = 0;
Eterm* ptr;
int arity;
+ Eterm *lit_purge_ptr = litopt ? litopt->lit_purge_ptr : NULL;
+ Uint lit_purge_sz = litopt ? litopt->lit_purge_sz : 0;
#ifdef DEBUG
Eterm mypid = erts_get_current_pid();
#endif
-
DECLARE_ESTACK(s);
-
VERBOSE(DEBUG_SHCOPY, ("[pid=%T] size_object %p\n", mypid, obj));
for (;;) {
switch (primary_tag(obj)) {
case TAG_PRIMARY_LIST:
- sum += 2;
ptr = list_val(obj);
+ if (litopt && erts_is_literal(obj,ptr) && !in_literal_purge_area(ptr)) {
+ goto pop_next;
+ }
+ sum += 2;
obj = *ptr++;
if (!IS_CONST(obj)) {
ESTACK_PUSH(s, obj);
- }
+ }
obj = *ptr;
break;
case TAG_PRIMARY_BOXED:
{
- Eterm hdr = *boxed_val(obj);
+ Eterm hdr;
+ ptr = boxed_val(obj);
+ if (litopt && erts_is_literal(obj,ptr) && !in_literal_purge_area(ptr)) {
+ goto pop_next;
+ }
+ hdr = *ptr;
ASSERT(is_header(hdr));
switch (hdr & _TAG_HEADER_MASK) {
case ARITYVAL_SUBTAG:
@@ -279,10 +293,6 @@ do { \
#define COUNT_OFF_HEAP (0)
-#define IN_LITERAL_PURGE_AREA(info, ptr) \
- ((info)->range_ptr && ( \
- (info)->range_ptr <= (ptr) && \
- (ptr) < ((info)->range_ptr + (info)->range_sz)))
/*
* Return the real size of an object and find sharing information
* This currently returns the same as erts_debug:size/1.
@@ -599,7 +609,7 @@ cleanup:
/*
* Copy a structure to a heap.
*/
-Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint *bsz)
+Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint *bsz, erts_literal_area_t *litopt)
{
char* hstart;
Uint hsize;
@@ -616,6 +626,8 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
Eterm hdr;
Eterm *hend;
int i;
+ Eterm *lit_purge_ptr = litopt ? litopt->lit_purge_ptr : NULL;
+ Uint lit_purge_sz = litopt ? litopt->lit_purge_sz : 0;
#ifdef DEBUG
Eterm org_obj = obj;
Uint org_sz = sz;
@@ -651,7 +663,6 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
L_copy:
while (hp != htop) {
obj = *hp;
-
switch (primary_tag(obj)) {
case TAG_PRIMARY_IMMED1:
hp++;
@@ -667,6 +678,10 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
L_copy_list:
tailp = argp;
+ if (litopt && erts_is_literal(obj,objp) && !in_literal_purge_area(objp)) {
+ *tailp = obj;
+ goto L_copy;
+ }
for (;;) {
tp = tailp;
elem = CAR(objp);
@@ -674,18 +689,23 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
hbot -= 2;
CAR(hbot) = elem;
tailp = &CDR(hbot);
- }
- else {
+ } else {
CAR(htop) = elem;
tailp = &CDR(htop);
htop += 2;
}
*tp = make_list(tailp - 1);
obj = CDR(objp);
+
if (!is_list(obj)) {
break;
}
objp = list_val(obj);
+
+ if (litopt && erts_is_literal(obj,objp) && !in_literal_purge_area(objp)) {
+ *tailp = obj;
+ goto L_copy;
+ }
}
switch (primary_tag(obj)) {
case TAG_PRIMARY_IMMED1: *tailp = obj; goto L_copy;
@@ -695,7 +715,7 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
"%s, line %d: Internal error in copy_struct: 0x%08x\n",
__FILE__, __LINE__,obj);
}
-
+
case TAG_PRIMARY_BOXED:
if (ErtsInArea(boxed_val(obj),hstart,hsize)) {
hp++;
@@ -705,6 +725,10 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
L_copy_boxed:
objp = boxed_val(obj);
+ if (litopt && erts_is_literal(obj,objp) && !in_literal_purge_area(objp)) {
+ *argp = obj;
+ break;
+ }
hdr = *objp;
switch (hdr & _TAG_HEADER_MASK) {
case ARITYVAL_SUBTAG:
@@ -765,7 +789,7 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
extra_bytes = 1;
} else {
extra_bytes = 0;
- }
+ }
real_size = size+extra_bytes;
objp = binary_val(real_bin);
if (thing_subtag(*objp) == HEAP_BINARY_SUBTAG) {
@@ -780,7 +804,7 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
} else {
ProcBin* from = (ProcBin *) objp;
ProcBin* to;
-
+
ASSERT(thing_subtag(*objp) == REFC_BINARY_SUBTAG);
if (from->flags) {
erts_emasculate_writable_binary(from);
@@ -834,20 +858,24 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
case EXTERNAL_PORT_SUBTAG:
case EXTERNAL_REF_SUBTAG:
{
- ExternalThing *etp = (ExternalThing *) htop;
-
+ ExternalThing *etp = (ExternalThing *) objp;
+ erts_smp_refc_inc(&etp->node->refc, 2);
+ }
+ L_off_heap_node_container_common:
+ {
+ struct erl_off_heap_header *ohhp;
+ ohhp = (struct erl_off_heap_header *) htop;
i = thing_arityval(hdr) + 1;
+ *argp = make_boxed(htop);
tp = htop;
while (i--) {
*htop++ = *objp++;
}
- etp->next = off_heap->first;
- off_heap->first = (struct erl_off_heap_header*)etp;
- erts_smp_refc_inc(&etp->node->refc, 2);
+ ohhp->next = off_heap->first;
+ off_heap->first = ohhp;
- *argp = make_external(tp);
}
break;
case MAP_SUBTAG:
@@ -875,6 +903,13 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
case BIN_MATCHSTATE_SUBTAG:
erts_exit(ERTS_ABORT_EXIT,
"copy_struct: matchstate term not allowed");
+ case REF_SUBTAG:
+ if (is_magic_ref_thing(objp)) {
+ ErtsMRefThing *mreft = (ErtsMRefThing *) objp;
+ erts_refc_inc(&mreft->mb->refc, 2);
+ goto L_off_heap_node_container_common;
+ }
+ /* Fall through... */
default:
i = thing_arityval(hdr)+1;
hbot -= i;
@@ -900,6 +935,12 @@ Eterm copy_struct_x(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap, Uint
*bsz = hend - hbot;
} else {
#ifdef DEBUG
+ if (!eq(org_obj, res)) {
+ erts_exit(ERTS_ABORT_EXIT,
+ "Internal error in copy_struct() when copying %T:"
+ " not equal to copy %T\n",
+ org_obj, res);
+ }
if (htop != hbot)
erts_exit(ERTS_ABORT_EXIT,
"Internal error in copy_struct() when copying %T:"
@@ -1036,6 +1077,8 @@ Uint copy_shared_calculate(Eterm obj, erts_shcopy_t *info)
Uint e;
unsigned sz;
Eterm* ptr;
+ Eterm *lit_purge_ptr = info->lit_purge_ptr;
+ Uint lit_purge_sz = info->lit_purge_sz;
#ifdef DEBUG
Eterm mypid = erts_get_current_pid();
#endif
@@ -1081,7 +1124,7 @@ Uint copy_shared_calculate(Eterm obj, erts_shcopy_t *info)
/* off heap list pointers are copied verbatim */
if (erts_is_literal(obj,ptr)) {
VERBOSE(DEBUG_SHCOPY, ("[pid=%T] bypassed copying %p is %T\n", mypid, ptr, obj));
- if (IN_LITERAL_PURGE_AREA(info,ptr))
+ if (in_literal_purge_area(ptr))
info->literal_size += size_object(obj);
goto pop_next;
}
@@ -1132,7 +1175,7 @@ Uint copy_shared_calculate(Eterm obj, erts_shcopy_t *info)
/* off heap pointers to boxes are copied verbatim */
if (erts_is_literal(obj,ptr)) {
VERBOSE(DEBUG_SHCOPY, ("[pid=%T] bypassed copying %p is %T\n", mypid, ptr, obj));
- if (IN_LITERAL_PURGE_AREA(info,ptr))
+ if (in_literal_purge_area(ptr))
info->literal_size += size_object(obj);
goto pop_next;
}
@@ -1298,6 +1341,8 @@ Uint copy_shared_perform(Eterm obj, Uint size, erts_shcopy_t *info,
Eterm* resp;
Eterm *hbot, *hend;
unsigned remaining;
+ Eterm *lit_purge_ptr = info->lit_purge_ptr;
+ Uint lit_purge_sz = info->lit_purge_sz;
#ifdef DEBUG
Eterm mypid = erts_get_current_pid();
Eterm saved_obj = obj;
@@ -1347,11 +1392,11 @@ Uint copy_shared_perform(Eterm obj, Uint size, erts_shcopy_t *info,
ptr = list_val(obj);
/* off heap list pointers are copied verbatim */
if (erts_is_literal(obj,ptr)) {
- if (!IN_LITERAL_PURGE_AREA(info,ptr)) {
+ if (!in_literal_purge_area(ptr)) {
*resp = obj;
} else {
Uint bsz = 0;
- *resp = copy_struct_x(obj, hbot - hp, &hp, off_heap, &bsz);
+ *resp = copy_struct_x(obj, hbot - hp, &hp, off_heap, &bsz, NULL); /* copy literal */
hbot -= bsz;
}
goto cleanup_next;
@@ -1415,11 +1460,11 @@ Uint copy_shared_perform(Eterm obj, Uint size, erts_shcopy_t *info,
ptr = boxed_val(obj);
/* off heap pointers to boxes are copied verbatim */
if (erts_is_literal(obj,ptr)) {
- if (!IN_LITERAL_PURGE_AREA(info,ptr)) {
+ if (!in_literal_purge_area(ptr)) {
*resp = obj;
} else {
Uint bsz = 0;
- *resp = copy_struct_x(obj, hbot - hp, &hp, off_heap, &bsz);
+ *resp = copy_struct_x(obj, hbot - hp, &hp, off_heap, &bsz, NULL); /* copy literal */
hbot -= bsz;
}
goto cleanup_next;
@@ -1615,20 +1660,33 @@ Uint copy_shared_perform(Eterm obj, Uint size, erts_shcopy_t *info,
}
case EXTERNAL_PID_SUBTAG:
case EXTERNAL_PORT_SUBTAG:
- case EXTERNAL_REF_SUBTAG: {
- ExternalThing *etp = (ExternalThing *) hp;
+ case EXTERNAL_REF_SUBTAG:
+ {
+ ExternalThing *etp = (ExternalThing *) ptr;
+ erts_smp_refc_inc(&etp->node->refc, 2);
+ }
+ off_heap_node_container_common:
+ {
+ struct erl_off_heap_header *ohhp;
+ ohhp = (struct erl_off_heap_header *) hp;
sz = thing_arityval(hdr);
- *resp = make_external(hp);
+ *resp = make_boxed(hp);
*hp++ = hdr;
ptr++;
while (sz-- > 0) {
*hp++ = *ptr++;
}
- etp->next = off_heap->first;
- off_heap->first = (struct erl_off_heap_header*) etp;
- erts_smp_refc_inc(&etp->node->refc, 2);
+ ohhp->next = off_heap->first;
+ off_heap->first = ohhp;
goto cleanup_next;
}
+ case REF_SUBTAG:
+ if (is_magic_ref_thing(ptr)) {
+ ErtsMRefThing *mreft = (ErtsMRefThing *) ptr;
+ erts_refc_inc(&mreft->mb->refc, 2);
+ goto off_heap_node_container_common;
+ }
+ /* Fall through... */
default:
sz = thing_arityval(hdr);
*resp = make_boxed(hp);
@@ -1825,6 +1883,15 @@ Eterm copy_shallow(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
off_heap->first = ohh;
}
break;
+ case REF_SUBTAG: {
+ ErtsRefThing *rtp = (ErtsRefThing *) (tp - 1);
+ if (is_magic_ref_thing(rtp)) {
+ ErtsMRefThing *mreft = (ErtsMRefThing *) rtp;
+ erts_refc_inc(&mreft->mb->refc, 2);
+ goto off_heap_common;
+ }
+ /* Fall through... */
+ }
default:
{
int tari = header_arity(val);
@@ -1923,8 +1990,11 @@ move_one_frag(Eterm** hpp, ErlHeapFragment* frag, ErlOffHeap* off_heap, int lite
if (is_header(val)) {
struct erl_off_heap_header* hdr = (struct erl_off_heap_header*)hp;
ASSERT(ptr + header_arity(val) < end);
- MOVE_BOXED(ptr, val, hp, &dummy_ref);
+ move_boxed(&ptr, val, &hp, &dummy_ref);
switch (val & _HEADER_SUBTAG_MASK) {
+ case REF_SUBTAG:
+ if (is_ordinary_ref_thing(hdr))
+ break;
case REFC_BINARY_SUBTAG:
case FUN_SUBTAG:
case EXTERNAL_PID_SUBTAG:
@@ -1937,7 +2007,7 @@ move_one_frag(Eterm** hpp, ErlHeapFragment* frag, ErlOffHeap* off_heap, int lite
}
else { /* must be a cons cell */
ASSERT(ptr+1 < end);
- MOVE_CONS(ptr, val, hp, &dummy_ref);
+ move_cons(&ptr, val, &hp, &dummy_ref);
ptr += 2;
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 01:04:34 +0000