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-rw-r--r--erts/emulator/beam/external.c625
1 files changed, 534 insertions, 91 deletions
diff --git a/erts/emulator/beam/external.c b/erts/emulator/beam/external.c
index 8420cfae24..45025ad631 100644
--- a/erts/emulator/beam/external.c
+++ b/erts/emulator/beam/external.c
@@ -81,7 +81,11 @@
*
*/
+static Export term_to_binary_trap_export;
+
static byte* enc_term(ErtsAtomCacheMap *, Eterm, byte*, Uint32, struct erl_off_heap_header** off_heap);
+static int enc_term_int(Process *p,ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
+ struct erl_off_heap_header** off_heap, Sint *reds, byte **res);
static Uint is_external_string(Eterm obj, int* p_is_string);
static byte* enc_atom(ErtsAtomCacheMap *, Eterm, byte*, Uint32);
static byte* enc_pid(ErtsAtomCacheMap *, Eterm, byte*, Uint32);
@@ -89,9 +93,31 @@ static byte* dec_term(ErtsDistExternal *, Eterm**, byte*, ErlOffHeap*, Eterm*);
static byte* dec_atom(ErtsDistExternal *, byte*, Eterm*);
static byte* dec_pid(ErtsDistExternal *, Eterm**, byte*, ErlOffHeap*, Eterm*);
static Sint decoded_size(byte *ep, byte* endp, int internal_tags);
+static BIF_RETTYPE term_to_binary_trap_1(BIF_ALIST_1);
+static Eterm erts_term_to_binary_int(Process* p, Eterm Term, int level, Uint flags,
+ Binary *context_b);
static Uint encode_size_struct2(ErtsAtomCacheMap *, Eterm, unsigned);
+static int encode_size_struct_int(Process *p, ErtsAtomCacheMap *acmp, Eterm obj,
+ unsigned dflags, Sint *reds, Uint *res);
+
+void erts_init_external(void) {
+#if 1 /* In R16 */
+ erts_init_trap_export(&term_to_binary_trap_export,
+ am_erlang, am_term_to_binary_trap, 1,
+ &term_to_binary_trap_1);
+#else
+ sys_memset((void *) &term_to_binary_trap_export, 0, sizeof(Export));
+ term_to_binary_trap_export.address = &term_to_binary_trap_export.code[3];
+ term_to_binary_trap_export.code[0] = am_erlang;
+ term_to_binary_trap_export.code[1] = am_term_to_binary_trap;
+ term_to_binary_trap_export.code[2] = 1;
+ term_to_binary_trap_export.code[3] = (BeamInstr) em_apply_bif;
+ term_to_binary_trap_export.code[4] = (BeamInstr) &term_to_binary_trap_1;
+#endif
+ return;
+}
#define ERTS_MAX_INTERNAL_ATOM_CACHE_ENTRIES 255
@@ -1009,10 +1035,28 @@ BIF_RETTYPE erts_debug_dist_ext_to_term_2(BIF_ALIST_2)
BIF_ERROR(BIF_P, BADARG);
}
-
+static BIF_RETTYPE term_to_binary_trap_1(BIF_ALIST_1)
+{
+ Eterm *tp = tuple_val(BIF_ARG_1);
+ Eterm Term = tp[1];
+ Eterm bt = tp[2];
+ Binary *bin = ((ProcBin *) binary_val(bt))->val;
+ Eterm res = erts_term_to_binary_int(BIF_P, Term, 0, 0,bin);
+ if (is_tuple(res)) {
+ BIF_TRAP1(&term_to_binary_trap_export,BIF_P,res);
+ } else {
+ BIF_RET(res);
+ }
+}
+
BIF_RETTYPE term_to_binary_1(BIF_ALIST_1)
{
- return erts_term_to_binary(BIF_P, BIF_ARG_1, 0, TERM_TO_BINARY_DFLAGS);
+ Eterm res = erts_term_to_binary_int(BIF_P, BIF_ARG_1, 0, TERM_TO_BINARY_DFLAGS, NULL);
+ if (is_tuple(res)) {
+ BIF_TRAP1(&term_to_binary_trap_export,BIF_P,res);
+ } else {
+ BIF_RET(res);
+ }
}
BIF_RETTYPE term_to_binary_2(BIF_ALIST_2)
@@ -1022,6 +1066,8 @@ BIF_RETTYPE term_to_binary_2(BIF_ALIST_2)
Eterm Flags = BIF_ARG_2;
int level = 0;
Uint flags = TERM_TO_BINARY_DFLAGS;
+ Eterm res;
+ Binary *bin = NULL;
while (is_list(Flags)) {
Eterm arg = CAR(list_val(Flags));
@@ -1058,7 +1104,12 @@ BIF_RETTYPE term_to_binary_2(BIF_ALIST_2)
goto error;
}
- return erts_term_to_binary(p, Term, level, flags);
+ res = erts_term_to_binary_int(p, Term, level, flags, bin);
+ if (is_tuple(res)) {
+ BIF_TRAP1(&term_to_binary_trap_export,BIF_P,res);
+ } else {
+ BIF_RET(res);
+ }
}
static uLongf binary2term_uncomp_size(byte* data, Sint size)
@@ -1335,16 +1386,13 @@ external_size_2(BIF_ALIST_2)
}
}
-Eterm
-erts_term_to_binary(Process* p, Eterm Term, int level, Uint flags)
+static Eterm
+erts_term_to_binary_simple(Process* p, Eterm Term, Uint size, int level, Uint flags)
{
- Uint size;
Eterm bin;
size_t real_size;
byte* endp;
- size = encode_size_struct2(NULL, Term, flags) + 1 /* VERSION_MAGIC */;
-
if (level != 0) {
byte buf[256];
byte* bytes = buf;
@@ -1414,6 +1462,318 @@ erts_term_to_binary(Process* p, Eterm Term, int level, Uint flags)
}
}
+Eterm
+erts_term_to_binary(Process* p, Eterm Term, int level, Uint flags) {
+ Uint size;
+ size = encode_size_struct2(NULL, Term, flags) + 1 /* VERSION_MAGIC */;
+ return erts_term_to_binary_simple(p, Term, size, level, flags);
+}
+
+/* Define for testing */
+/* #define EXTREME_TTB_TRAPPING 1 */
+
+#ifndef EXTREME_TTB_TRAPPING
+#define TERM_TO_BINARY_LOOP_FACTOR 500
+#define TERM_TO_BINARY_SIZE_FACTOR 500000
+#define TERM_TO_BINARY_COMPRESS_CHUNK 500000
+#else
+#define TERM_TO_BINARY_LOOP_FACTOR 1
+#define TERM_TO_BINARY_SIZE_FACTOR 10
+#define TERM_TO_BINARY_COMPRESS_CHUNK 10
+#endif
+
+
+typedef enum { TTBSize, TTBEncode, TTBCompress } TTBState;
+typedef struct {
+ Uint flags;
+ int level;
+} TTBSizeContext;
+
+typedef struct {
+ Uint flags;
+ int level;
+ Binary *result_bin;
+} TTBEncodeContext;
+
+typedef struct {
+ Uint real_size;
+ Uint dest_len;
+ byte *dbytes;
+ Binary *result_bin;
+ Binary *destination_bin;
+ z_stream stream;
+} TTBCompressContext;
+
+typedef struct {
+ int alive;
+ TTBState state;
+ union {
+ TTBSizeContext sc;
+ TTBEncodeContext ec;
+ TTBCompressContext cc;
+ } s;
+} TTBContext;
+
+static void context_destructor(Binary *context_bin)
+{
+ TTBContext *context = ERTS_MAGIC_BIN_DATA(context_bin);
+ if (context->alive) {
+ context->alive = 0;
+ switch (context->state) {
+ case TTBSize:
+ break;
+ case TTBEncode:
+ if (context->s.ec.result_bin != NULL) { /* Set to NULL if ever made alive! */
+ ASSERT(erts_refc_read(&(context->s.ec.result_bin->refc),0) == 0);
+ erts_bin_free(context->s.ec.result_bin);
+ context->s.ec.result_bin = NULL;
+ }
+ break;
+ case TTBCompress:
+ erl_zlib_deflate_finish(&(context->s.cc.stream));
+
+ if (context->s.cc.destination_bin != NULL) { /* Set to NULL if ever made alive! */
+ ASSERT(erts_refc_read(&(context->s.cc.destination_bin->refc),0) == 0);
+ erts_bin_free(context->s.cc.destination_bin);
+ context->s.cc.destination_bin = NULL;
+ }
+
+ if (context->s.cc.result_bin != NULL) { /* Set to NULL if ever made alive! */
+ ASSERT(erts_refc_read(&(context->s.cc.result_bin->refc),0) == 0);
+ erts_bin_free(context->s.cc.result_bin);
+ context->s.cc.result_bin = NULL;
+ }
+ break;
+ }
+ }
+}
+
+static Eterm erts_term_to_binary_int(Process* p, Eterm Term, int level, Uint flags,
+ Binary *context_b)
+{
+ Eterm *hp;
+ Eterm res;
+ Eterm c_term;
+#ifndef EXTREME_TTB_TRAPPING
+ Sint reds = (Sint) (ERTS_BIF_REDS_LEFT(p) * TERM_TO_BINARY_LOOP_FACTOR);
+#else
+ Sint reds = 20; /* For testing */
+#endif
+ Sint initial_reds = reds;
+ TTBContext c_buff;
+ TTBContext *context = &c_buff;
+
+#define EXPORT_CONTEXT() \
+ do { \
+ if (context_b == NULL) { \
+ context_b = erts_create_magic_binary(sizeof(TTBContext), \
+ context_destructor); \
+ context = ERTS_MAGIC_BIN_DATA(context_b); \
+ memcpy(context,&c_buff,sizeof(TTBContext)); \
+ } \
+ } while (0)
+
+#define RETURN_STATE() \
+ do { \
+ hp = HAlloc(p, PROC_BIN_SIZE+3); \
+ c_term = erts_mk_magic_binary_term(&hp, &MSO(p), context_b); \
+ res = TUPLE2(hp, Term, c_term); \
+ BUMP_ALL_REDS(p); \
+ return res; \
+ } while (0);
+
+
+ if (context_b == NULL) {
+ /* Setup enough to get started */
+ context->state = TTBSize;
+ context->alive = 1;
+ context->s.sc.flags = flags;
+ context->s.sc.level = level;
+ } else {
+ context = ERTS_MAGIC_BIN_DATA(context_b);
+ }
+ /* Initialization done, now we will go through the states */
+ for (;;) {
+ switch (context->state) {
+ case TTBSize:
+ {
+ Uint size;
+ Binary *result_bin;
+ int level;
+ Uint flags;
+ /* Try for fast path */
+ if (encode_size_struct_int(p, NULL, Term, context->s.sc.flags, &reds, &size) < 0) {
+ EXPORT_CONTEXT();
+ /* Same state */
+ RETURN_STATE();
+ }
+ ++size; /* VERSION_MAGIC */
+ /* Move these to next state */
+ flags = context->s.sc.flags;
+ level = context->s.sc.level;
+ if (size <= ERL_ONHEAP_BIN_LIMIT) {
+ /* Finish in one go */
+ res = erts_term_to_binary_simple(p, Term, size,
+ level, flags);
+ BUMP_REDS(p, size / TERM_TO_BINARY_SIZE_FACTOR);
+ return res;
+ }
+
+ result_bin = erts_bin_nrml_alloc(size);
+ result_bin->flags = 0;
+ result_bin->orig_size = size;
+ erts_refc_init(&result_bin->refc, 0);
+ result_bin->orig_bytes[0] = VERSION_MAGIC;
+ /* Next state immediately, no need to export context */
+ context->state = TTBEncode;
+ context->s.ec.flags = flags;
+ context->s.ec.level = level;
+ context->s.ec.result_bin = result_bin;
+ break;
+ }
+ case TTBEncode:
+ {
+ byte *endp;
+ byte *bytes = (byte *) context->s.ec.result_bin->orig_bytes;
+ size_t real_size;
+ Binary *result_bin;
+
+ flags = context->s.ec.flags;
+ if (enc_term_int(p,NULL,Term, bytes+1, flags, NULL, &reds, &endp) < 0) {
+ EXPORT_CONTEXT();
+ RETURN_STATE();
+ }
+ real_size = endp - bytes;
+ result_bin = erts_bin_realloc(context->s.ec.result_bin,real_size);
+ level = context->s.ec.level;
+ BUMP_REDS(p, (initial_reds - reds) / TERM_TO_BINARY_LOOP_FACTOR);
+ if (level == 0 || real_size < 6) { /* We are done */
+ ProcBin* pb;
+ return_normal:
+ context->s.ec.result_bin = NULL;
+ context->alive = 0;
+ pb = (ProcBin *) HAlloc(p, PROC_BIN_SIZE);
+ pb->thing_word = HEADER_PROC_BIN;
+ pb->size = real_size;
+ pb->next = MSO(p).first;
+ MSO(p).first = (struct erl_off_heap_header*)pb;
+ pb->val = result_bin;
+ pb->bytes = (byte*) result_bin->orig_bytes;
+ pb->flags = 0;
+ OH_OVERHEAD(&(MSO(p)), pb->size / sizeof(Eterm));
+ erts_refc_inc(&result_bin->refc, 1);
+ return make_binary(pb);
+ }
+ /* Continue with compression... */
+ /* To make absolutely sure that zlib does not barf on a reallocated context,
+ we make sure it's "exported" before doing anything compession-like */
+ EXPORT_CONTEXT();
+ bytes = (byte *) result_bin->orig_bytes; /* result_bin is reallocated */
+ if (erl_zlib_deflate_start(&(context->s.cc.stream),bytes+1,real_size-1,level)
+ != Z_OK) {
+ goto return_normal;
+ }
+ context->state = TTBCompress;
+ context->s.cc.real_size = real_size;
+ context->s.cc.result_bin = result_bin;
+
+ result_bin = erts_bin_nrml_alloc(real_size);
+ result_bin->flags = 0;
+ result_bin->orig_size = real_size;
+ erts_refc_init(&result_bin->refc, 0);
+ result_bin->orig_bytes[0] = VERSION_MAGIC;
+
+ context->s.cc.destination_bin = result_bin;
+ context->s.cc.dest_len = 0;
+ context->s.cc.dbytes = (byte *) result_bin->orig_bytes+6;
+ break;
+ }
+ case TTBCompress:
+ {
+ uLongf tot_dest_len = context->s.cc.real_size - 6;
+ uLongf left = (tot_dest_len - context->s.cc.dest_len);
+ uLongf this_time = (left > TERM_TO_BINARY_COMPRESS_CHUNK) ?
+ TERM_TO_BINARY_COMPRESS_CHUNK :
+ left;
+ Binary *result_bin;
+ ProcBin *pb;
+ Uint max = (ERTS_BIF_REDS_LEFT(p) * TERM_TO_BINARY_COMPRESS_CHUNK) / CONTEXT_REDS;
+
+ if (max < this_time) {
+ this_time = max + 1; /* do not set this_time to 0 */
+ }
+
+ res = erl_zlib_deflate_chunk(&(context->s.cc.stream), context->s.cc.dbytes, &this_time);
+ context->s.cc.dbytes += this_time;
+ context->s.cc.dest_len += this_time;
+ switch (res) {
+ case Z_OK:
+ if (context->s.cc.dest_len >= tot_dest_len) {
+ goto no_use_compressing;
+ }
+ RETURN_STATE();
+ case Z_STREAM_END:
+ {
+ byte *dbytes = (byte *) context->s.cc.destination_bin->orig_bytes + 1;
+
+ dbytes[0] = COMPRESSED;
+ put_int32(context->s.cc.real_size-1,dbytes+1);
+ erl_zlib_deflate_finish(&(context->s.cc.stream));
+ result_bin = erts_bin_realloc(context->s.cc.destination_bin,
+ context->s.cc.dest_len+6);
+ context->s.cc.destination_bin = NULL;
+ pb = (ProcBin *) HAlloc(p, PROC_BIN_SIZE);
+ pb->thing_word = HEADER_PROC_BIN;
+ pb->size = context->s.cc.dest_len+6;
+ pb->next = MSO(p).first;
+ MSO(p).first = (struct erl_off_heap_header*)pb;
+ pb->val = result_bin;
+ pb->bytes = (byte*) result_bin->orig_bytes;
+ pb->flags = 0;
+ OH_OVERHEAD(&(MSO(p)), pb->size / sizeof(Eterm));
+ erts_refc_inc(&result_bin->refc, 1);
+ erts_bin_free(context->s.cc.result_bin);
+ context->s.cc.result_bin = NULL;
+ context->alive = 0;
+ BUMP_REDS(p, (this_time * CONTEXT_REDS) / TERM_TO_BINARY_COMPRESS_CHUNK);
+ return make_binary(pb);
+ }
+ default: /* Compression error, revert to uncompressed binary (still in
+ context) */
+ no_use_compressing:
+ result_bin = context->s.cc.result_bin;
+ context->s.cc.result_bin = NULL;
+ pb = (ProcBin *) HAlloc(p, PROC_BIN_SIZE);
+ pb->thing_word = HEADER_PROC_BIN;
+ pb->size = context->s.cc.real_size;
+ pb->next = MSO(p).first;
+ MSO(p).first = (struct erl_off_heap_header*)pb;
+ pb->val = result_bin;
+ pb->bytes = (byte*) result_bin->orig_bytes;
+ pb->flags = 0;
+ OH_OVERHEAD(&(MSO(p)), pb->size / sizeof(Eterm));
+ erts_refc_inc(&result_bin->refc, 1);
+ erl_zlib_deflate_finish(&(context->s.cc.stream));
+ erts_bin_free(context->s.cc.destination_bin);
+ context->s.cc.destination_bin = NULL;
+ context->alive = 0;
+ BUMP_REDS(p, (this_time * CONTEXT_REDS) / TERM_TO_BINARY_COMPRESS_CHUNK);
+ return make_binary(pb);
+ }
+ }
+ }
+ }
+#undef EXPORT_CONTEXT
+#undef RETURN_STATE
+}
+
+
+
+
+
+
+
+
/*
* This function fills ext with the external format of atom.
* If it's an old atom we just supply an index, otherwise
@@ -1678,32 +2038,71 @@ dec_pid(ErtsDistExternal *edep, Eterm** hpp, byte* ep, ErlOffHeap* off_heap, Ete
#define ENC_PATCH_FUN_SIZE ((Eterm) 2)
#define ENC_LAST_ARRAY_ELEMENT ((Eterm) 3)
+/* Free extra rootset (used when trapping) */
+static void cleanup_ttb_extra_root(ErlExtraRootSet *rs)
+{
+ if (rs->objv != NULL) {
+ erts_free(ERTS_ALC_T_EXTRA_ROOT, rs->objv);
+ }
+ erts_free(ERTS_ALC_T_EXTRA_ROOT, rs);
+}
+
+/* Same as above, but we have an extra "stack" beyond GC reach, i.e. an array of two extra roots */
+static void cleanup_ttb_extra_root_2(ErlExtraRootSet *rs)
+{
+ if (rs->objv != NULL) {
+ erts_free(ERTS_ALC_T_EXTRA_ROOT, rs->objv);
+ }
+ if (rs[1].objv != NULL) {
+ erts_free(ERTS_ALC_T_EXTRA_ROOT, rs[1].objv);
+ }
+
+ erts_free(ERTS_ALC_T_EXTRA_ROOT, rs);
+}
+
static byte*
enc_term(ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
struct erl_off_heap_header** off_heap)
{
- DECLARE_WSTACK(s);
+ byte *res;
+ (void) enc_term_int(NULL, acmp, obj, ep, dflags, off_heap, NULL, &res);
+ return res;
+}
+
+static int
+enc_term_int(Process *p,ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
+ struct erl_off_heap_header** off_heap, Sint *reds, byte **res)
+{
+ DECLARE_ESTACK(s);
+ DECLARE_WSTACK(com);
Uint n;
Uint i;
Uint j;
Uint* ptr;
Eterm val;
FloatDef f;
-#if HALFWORD_HEAP
- UWord wobj;
-#endif
+ int count_reds = (p != NULL && reds != NULL);
+ Sint r = 0;
+ if (count_reds) {
+ ESTACK_CHANGE_ALLOCATOR(s, ERTS_ALC_T_EXTRA_ROOT);
+ WSTACK_CHANGE_ALLOCATOR(com, ERTS_ALC_T_EXTRA_ROOT);
+ r = *reds;
+ }
+
+ if (p && p->extra_root) { /* restore saved stacks and byte pointer */
+ ESTACK_RESTORE(s,p->extra_root[0].objv, p->extra_root[0].sz);
+ obj = ESTACK_POP(s);
+ WSTACK_RESTORE(com, p->extra_root[1].objv, p->extra_root[1].sz);
+ ep = (byte *) WSTACK_POP(com);
+ }
goto L_jump_start;
outer_loop:
- while (!WSTACK_ISEMPTY(s)) {
-#if HALFWORD_HEAP
- obj = (Eterm) (wobj = WSTACK_POP(s));
-#else
- obj = WSTACK_POP(s);
-#endif
- switch (val = WSTACK_POP(s)) {
+ while (!ESTACK_ISEMPTY(s)) {
+ obj = ESTACK_POP(s);
+ switch (val = WSTACK_POP(com)) {
case ENC_TERM:
break;
case ENC_ONE_CONS:
@@ -1714,45 +2113,57 @@ enc_term(ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
obj = CAR(cons);
tl = CDR(cons);
- WSTACK_PUSH(s, is_list(tl) ? ENC_ONE_CONS : ENC_TERM);
- WSTACK_PUSH(s, tl);
+ WSTACK_PUSH(com, is_list(tl) ? ENC_ONE_CONS : ENC_TERM);
+ ESTACK_PUSH(s, tl);
}
break;
case ENC_PATCH_FUN_SIZE:
+ /* obj will be discarded, it was NIL */
{
-#if HALFWORD_HEAP
- byte* size_p = (byte *) wobj;
-#else
- byte* size_p = (byte *) obj;
-#endif
+ byte* size_p = (byte *) WSTACK_POP(com);
put_int32(ep - size_p, size_p);
}
goto outer_loop;
case ENC_LAST_ARRAY_ELEMENT:
+ /* obj is the tuple */
{
-#if HALFWORD_HEAP
- Eterm* ptr = (Eterm *) wobj;
-#else
- Eterm* ptr = (Eterm *) obj;
-#endif
- obj = *ptr;
+ Eterm* ptr = tuple_val(obj);
+ i = arityval(*ptr);
+ obj = ptr[i];
}
break;
default: /* ENC_LAST_ARRAY_ELEMENT+1 and upwards */
{
-#if HALFWORD_HEAP
- Eterm* ptr = (Eterm *) wobj;
-#else
- Eterm* ptr = (Eterm *) obj;
-#endif
- obj = *ptr++;
- WSTACK_PUSH(s, val-1);
- WSTACK_PUSH(s, (UWord) ptr);
+ Eterm* ptr = tuple_val(obj);
+ i = arityval(*ptr);
+ ESTACK_PUSH(s, obj); /* put back tuple and next element index */
+ WSTACK_PUSH(com, val-1);
+ obj = ptr[i - (val - ENC_LAST_ARRAY_ELEMENT)]; /* the index is counting down */
}
break;
}
L_jump_start:
+
+ if (count_reds && --r == 0) {
+ *reds = r;
+ ESTACK_PUSH(s,obj); /* push back current object, to be popped on restore */
+ WSTACK_PUSH(com,((UWord) ep));
+ if (p->extra_root == NULL) {
+ /* NB. Allocate an array of two "extra-roots", of which only the first element
+ is seen and handled by the GC. Index 1 holds the Wstack. */
+ p->extra_root = erts_alloc(ERTS_ALC_T_EXTRA_ROOT, sizeof(ErlExtraRootSet)*2);
+ p->extra_root->objv = NULL;
+ p->extra_root->sz = 0;
+ p->extra_root->cleanup = cleanup_ttb_extra_root_2;
+ p->extra_root[1].objv = NULL;
+ p->extra_root[1].sz = 0;
+ p->extra_root[1].cleanup = NULL; /* Never used */
+ }
+ ESTACK_SAVE(s, p->extra_root[0].objv, p->extra_root[0].sz);
+ WSTACK_SAVE(com, p->extra_root[1].objv, (p->extra_root[1].sz));
+ return -1;
+ }
switch(tag_val_def(obj)) {
case NIL_DEF:
*ep++ = NIL_EXT;
@@ -1896,8 +2307,8 @@ enc_term(ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
ep += 4;
}
if (i > 0) {
- WSTACK_PUSH(s, ENC_LAST_ARRAY_ELEMENT+i-1);
- WSTACK_PUSH(s, (UWord) ptr);
+ WSTACK_PUSH(com, ENC_LAST_ARRAY_ELEMENT+i-1);
+ ESTACK_PUSH(s, obj);
}
break;
@@ -2041,8 +2452,9 @@ enc_term(ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
int ei;
*ep++ = NEW_FUN_EXT;
- WSTACK_PUSH(s, ENC_PATCH_FUN_SIZE);
- WSTACK_PUSH(s, (UWord) ep); /* Position for patching in size */
+ WSTACK_PUSH(com, (UWord) ep); /* Position for patching in size */
+ WSTACK_PUSH(com, ENC_PATCH_FUN_SIZE);
+ ESTACK_PUSH(s,NIL); /* Will be thrown away */
ep += 4;
*ep = funp->arity;
ep += 1;
@@ -2059,8 +2471,8 @@ enc_term(ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
fun_env:
for (ei = funp->num_free-1; ei > 0; ei--) {
- WSTACK_PUSH(s, ENC_TERM);
- WSTACK_PUSH(s, (UWord) funp->env[ei]);
+ WSTACK_PUSH(com, ENC_TERM);
+ ESTACK_PUSH(s, (UWord) funp->env[ei]);
}
if (funp->num_free != 0) {
obj = funp->env[0];
@@ -2103,8 +2515,17 @@ enc_term(ErtsAtomCacheMap *acmp, Eterm obj, byte* ep, Uint32 dflags,
break;
}
}
- DESTROY_WSTACK(s);
- return ep;
+ DESTROY_ESTACK(s);
+ DESTROY_WSTACK(com);
+ if (p && p->extra_root) {
+ cleanup_ttb_extra_root_2(p->extra_root);
+ p->extra_root = NULL;
+ }
+ if (count_reds) {
+ *reds = r;
+ }
+ *res = ep;
+ return 0;
}
static
@@ -2892,51 +3313,47 @@ dec_term_atom_common:
to a sequence of bytes
N.B. That this must agree with to_external2() above!!!
(except for cached atoms) */
+static Uint encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags) {
+ Uint res;
+ (void) encode_size_struct_int(NULL, acmp, obj, dflags, NULL, &res);
+ return res;
+}
-static Uint
-encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
+static int
+encode_size_struct_int(Process *p, ErtsAtomCacheMap *acmp, Eterm obj,
+ unsigned dflags, Sint *reds, Uint *res)
{
- DECLARE_WSTACK(s);
+ DECLARE_ESTACK(s);
Uint m, i, arity;
Uint result = 0;
-#if HALFWORD_HEAP
- UWord wobj = 0;
-#endif
+ int count_reds = (p != NULL && reds != 0);
+ Sint r = 0;
+
+ if (count_reds) {
+ ESTACK_CHANGE_ALLOCATOR(s, ERTS_ALC_T_EXTRA_ROOT);
+ r = *reds;
+ }
+
+ if (p && p->extra_root) { /* restore saved stack */
+ ESTACK_RESTORE(s,p->extra_root->objv, p->extra_root->sz + 1);
+ result = ESTACK_POP(s); /*Untagged, beyond p->extra_root->sz */
+ obj = ESTACK_POP(s);
+
+ }
goto L_jump_start;
outer_loop:
- while (!WSTACK_ISEMPTY(s)) {
-#if HALFWORD_HEAP
- obj = (Eterm) (wobj = WSTACK_POP(s));
-#else
- obj = WSTACK_POP(s);
-#endif
+ while (!ESTACK_ISEMPTY(s)) {
+ obj = ESTACK_POP(s);
handle_popped_obj:
- if (is_CP(obj)) { /* Does not look for CP, looks for "no tag" */
-#if HALFWORD_HEAP
- Eterm* ptr = (Eterm *) wobj;
-#else
- Eterm* ptr = (Eterm *) obj;
-#endif
- /*
- * Pointer into a tuple.
- */
- obj = *ptr--;
- if (!is_header(obj)) {
- WSTACK_PUSH(s, (UWord)ptr);
- } else {
- /* Reached tuple header */
- ASSERT(header_is_arityval(obj));
- goto outer_loop;
- }
- } else if (is_list(obj)) {
+ if (is_list(obj)) {
Eterm* cons = list_val(obj);
Eterm tl;
tl = CDR(cons);
obj = CAR(cons);
- WSTACK_PUSH(s, tl);
+ ESTACK_PUSH(s, tl);
} else if (is_nil(obj)) {
result++;
goto outer_loop;
@@ -2948,6 +3365,20 @@ encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
}
L_jump_start:
+ if (count_reds && --r == 0) {
+ *reds = r;
+ ESTACK_PUSH(s,obj); /* push back current object */
+ ESTACK_PUSH(s,result); /* Untagged, will be out of GC reach */
+ if (p->extra_root == NULL) {
+ p->extra_root = erts_alloc(ERTS_ALC_T_EXTRA_ROOT, sizeof(ErlExtraRootSet));
+ p->extra_root->objv = NULL;
+ p->extra_root->sz = 0;
+ p->extra_root->cleanup = cleanup_ttb_extra_root;
+ }
+ ESTACK_SAVE(s, p->extra_root->objv, p->extra_root->sz);
+ --p->extra_root->sz; /* Hide result from GC */
+ return -1;
+ }
switch (tag_val_def(obj)) {
case NIL_DEF:
result++;
@@ -3034,20 +3465,24 @@ encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
case TUPLE_DEF:
{
Eterm* ptr = tuple_val(obj);
-
+ Uint i;
arity = arityval(*ptr);
if (arity <= 0xff) {
result += 1 + 1;
} else {
result += 1 + 4;
}
- ptr += arity;
-#if HALFWORD_HEAP
- obj = (Eterm) (wobj = (UWord) ptr);
-#else
- obj = (Eterm) ptr;
-#endif
- goto handle_popped_obj;
+ for (i = 1; i <= arity; ++i) {
+ if (is_list(ptr[i])) {
+ if ((m = is_string(obj)) && (m < MAX_STRING_LEN)) {
+ result += m + 2 + 1;
+ } else {
+ result += 5;
+ }
+ }
+ ESTACK_PUSH(s,ptr[i]);
+ }
+ goto outer_loop;
}
break;
case FLOAT_DEF:
@@ -3105,14 +3540,14 @@ encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
if (is_not_list(obj)) {
/* Push any non-list terms on the stack */
- WSTACK_PUSH(s, obj);
+ ESTACK_PUSH(s, obj);
} else {
/* Lists must be handled specially. */
if ((m = is_string(obj)) && (m < MAX_STRING_LEN)) {
result += m + 2 + 1;
} else {
result += 5;
- WSTACK_PUSH(s, obj);
+ ESTACK_PUSH(s, obj);
}
}
}
@@ -3143,8 +3578,16 @@ encode_size_struct2(ErtsAtomCacheMap *acmp, Eterm obj, unsigned dflags)
}
}
- DESTROY_WSTACK(s);
- return result;
+ DESTROY_ESTACK(s);
+ if (p && p->extra_root) {
+ cleanup_ttb_extra_root(p->extra_root);
+ p->extra_root = NULL;
+ }
+ if (count_reds) {
+ *reds = r;
+ }
+ *res = result;
+ return 0;
}
static Sint
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 04:44:17 +0000