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-rw-r--r--erts/emulator/beam/atom.names1
-rw-r--r--erts/emulator/beam/erl_init.c1
-rw-r--r--erts/emulator/beam/erl_map.c255
-rw-r--r--erts/emulator/beam/global.h13
4 files changed, 196 insertions, 74 deletions
diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names
index 5ec1409adf..74b42c647e 100644
--- a/erts/emulator/beam/atom.names
+++ b/erts/emulator/beam/atom.names
@@ -350,6 +350,7 @@ atom message
atom message_binary
atom message_queue_len
atom messages
+atom merge_trap
atom meta
atom meta_match_spec
atom micro_seconds
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 988ff0e2b5..98ab9f598f 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -379,6 +379,7 @@ erl_init(int ncpu,
erts_init_bif_re();
erts_init_unicode(); /* after RE to get access to PCRE unicode */
erts_init_external();
+ erts_init_map();
erts_delay_trap = erts_export_put(am_erlang, am_delay_trap, 2);
erts_late_init_process();
#if HAVE_ERTS_MSEG
diff --git a/erts/emulator/beam/erl_map.c b/erts/emulator/beam/erl_map.c
index 5802ec76ba..c1ad5658d9 100644
--- a/erts/emulator/beam/erl_map.c
+++ b/erts/emulator/beam/erl_map.c
@@ -32,6 +32,7 @@
#include "erl_process.h"
#include "error.h"
#include "bif.h"
+#include "erl_binary.h"
#include "erl_map.h"
@@ -79,8 +80,12 @@ typedef struct {
static Eterm flatmap_merge(Process *p, Eterm nodeA, Eterm nodeB);
-static Eterm map_merge_mixed(Process *p, Eterm flat, Eterm tree, int swap_args);
-static Eterm hashmap_merge(Process *p, Eterm nodeA, Eterm nodeB, int swap_args);
+static BIF_RETTYPE map_merge_mixed(Process *p, Eterm flat, Eterm tree, int swap_args);
+struct HashmapMergeContext_;
+static BIF_RETTYPE hashmap_merge(Process *p, Eterm nodeA, Eterm nodeB, int swap_args,
+ struct HashmapMergeContext_*);
+static Export hashmap_merge_trap_export;
+static BIF_RETTYPE maps_merge_trap_1(BIF_ALIST_1);
static Eterm hashmap_to_list(Process *p, Eterm map);
static Eterm hashmap_keys(Process *p, Eterm map);
static Eterm hashmap_values(Process *p, Eterm map);
@@ -95,6 +100,15 @@ static Eterm hashmap_bld_tuple_uint(Uint **hpp, Uint *szp, Uint n, Uint nums[]);
static int hxnodecmp(hxnode_t* a, hxnode_t* b);
static int hxnodecmpkey(hxnode_t* a, hxnode_t* b);
+
+void erts_init_map(void) {
+ erts_init_trap_export(&hashmap_merge_trap_export,
+ am_maps, am_merge_trap, 1,
+ &maps_merge_trap_1);
+ return;
+}
+
+
/* erlang:map_size/1
* the corresponding instruction is implemented in:
* beam/erl_bif_guard.c
@@ -942,15 +956,15 @@ BIF_RETTYPE maps_merge_2(BIF_ALIST_2) {
BIF_RET(flatmap_merge(BIF_P, BIF_ARG_1, BIF_ARG_2));
} else if (is_hashmap(BIF_ARG_2)) {
/* Will always become a tree */
- BIF_RET(map_merge_mixed(BIF_P, BIF_ARG_1, BIF_ARG_2, 0));
+ return map_merge_mixed(BIF_P, BIF_ARG_1, BIF_ARG_2, 0);
}
BIF_P->fvalue = BIF_ARG_2;
} else if (is_hashmap(BIF_ARG_1)) {
if (is_hashmap(BIF_ARG_2)) {
- BIF_RET(hashmap_merge(BIF_P, BIF_ARG_1, BIF_ARG_2, 0));
+ return hashmap_merge(BIF_P, BIF_ARG_1, BIF_ARG_2, 0, NULL);
} else if (is_flatmap(BIF_ARG_2)) {
/* Will always become a tree */
- BIF_RET(map_merge_mixed(BIF_P, BIF_ARG_2, BIF_ARG_1, 1));
+ return map_merge_mixed(BIF_P, BIF_ARG_2, BIF_ARG_1, 1);
}
BIF_P->fvalue = BIF_ARG_2;
} else {
@@ -1113,30 +1127,63 @@ static Eterm map_merge_mixed(Process *p, Eterm flat, Eterm tree, int swap_args)
erts_free(ERTS_ALC_T_TMP, (void *) hxns);
ERTS_VERIFY_UNUSED_TEMP_ALLOC(p);
- return hashmap_merge(p, res, tree, swap_args);
+ return hashmap_merge(p, res, tree, swap_args, NULL);
+}
+
+#define PSTACK_TYPE struct HashmapMergePStackType
+struct HashmapMergePStackType {
+ Eterm *srcA, *srcB;
+ Uint32 abm, bbm, rbm; /* node bitmaps */
+ int keepA;
+ int ix;
+ Eterm array[16];
+};
+
+typedef struct HashmapMergeContext_ {
+ Uint size; /* total key-value counter */
+ unsigned int lvl;
+ Eterm nodeA, nodeB;
+ Eterm res;
+ Eterm trap_bin;
+ ErtsPStack pstack;
+#ifdef DEBUG
+ Eterm dbg_map_A, dbg_map_B;
+#endif
+} HashmapMergeContext;
+
+static void hashmap_merge_ctx_destructor(Binary* ctx_bin)
+{
+ HashmapMergeContext* ctx = (HashmapMergeContext*) ERTS_MAGIC_BIN_DATA(ctx_bin);
+ ASSERT(ERTS_MAGIC_BIN_DESTRUCTOR(ctx_bin) == hashmap_merge_ctx_destructor);
+
+ PSTACK_DESTROY_SAVED(&ctx->pstack);
+}
+
+BIF_RETTYPE maps_merge_trap_1(BIF_ALIST_1) {
+ Binary* ctx_bin = ((ProcBin *) binary_val(BIF_ARG_1))->val;
+
+ ASSERT(ERTS_MAGIC_BIN_DESTRUCTOR(ctx_bin) == hashmap_merge_ctx_destructor);
+
+ return hashmap_merge(BIF_P, NIL, NIL, 0,
+ (HashmapMergeContext*) ERTS_MAGIC_BIN_DATA(ctx_bin));
}
#define HALLOC_EXTRA 200
+#define MAP_MERGE_LOOP_FACTOR 8
-static Eterm hashmap_merge(Process *p, Eterm nodeA, Eterm nodeB, int swap_args) {
+static BIF_RETTYPE hashmap_merge(Process *p, Eterm map_A, Eterm map_B,
+ int swap_args, HashmapMergeContext* ctx) {
#define PSTACK_TYPE struct HashmapMergePStackType
- struct HashmapMergePStackType {
- Eterm *srcA, *srcB;
- Uint32 abm, bbm, rbm; /* node bitmaps */
- int keepA;
- int ix;
- Eterm array[16];
- };
PSTACK_DECLARE(s, 4);
- struct HashmapMergePStackType* sp = PSTACK_PUSH(s);
- Eterm *hp, *nhp;
- Eterm hdrA, hdrB;
+ HashmapMergeContext local_ctx;
+ struct HashmapMergePStackType* sp;
Uint32 ahx, bhx;
- Uint size; /* total key-value counter */
- int keepA = swap_args;
- unsigned int lvl = 0;
+ Eterm hdrA, hdrB;
+ Eterm *hp, *nhp;
+ Eterm trap_ret;
+ Sint initial_reds = (Sint) (ERTS_BIF_REDS_LEFT(p) * MAP_MERGE_LOOP_FACTOR);
+ Sint reds = initial_reds;
DeclareTmpHeap(th,2,p);
- Eterm res = THE_NON_VALUE;
UseTmpHeap(2,p);
/*
@@ -1144,52 +1191,72 @@ static Eterm hashmap_merge(Process *p, Eterm nodeA, Eterm nodeB, int swap_args)
* and merge each pair of nodes.
*/
- {
- hashmap_head_t* a = (hashmap_head_t*) hashmap_val(nodeA);
- hashmap_head_t* b = (hashmap_head_t*) hashmap_val(nodeB);
- size = a->size + b->size;
+ PSTACK_CHANGE_ALLOCATOR(s, ERTS_ALC_T_SAVED_ESTACK);
+
+ if (ctx == NULL) { /* first call */
+ hashmap_head_t* a = (hashmap_head_t*) hashmap_val(map_A);
+ hashmap_head_t* b = (hashmap_head_t*) hashmap_val(map_B);
+
+ sp = PSTACK_PUSH(s);
+ sp->keepA = swap_args;
+ local_ctx.size = a->size + b->size;
+ local_ctx.lvl = 0;
+ local_ctx.nodeA = map_A;
+ local_ctx.nodeB = map_B;
+ local_ctx.res = THE_NON_VALUE;
+ #ifdef DEBUG
+ local_ctx.dbg_map_A = map_A;
+ local_ctx.dbg_map_B = map_B;
+ local_ctx.trap_bin = THE_NON_VALUE;
+ #endif
+ ctx = &local_ctx;
+ }
+ else {
+ PSTACK_RESTORE(s, &ctx->pstack);
+ sp = PSTACK_TOP(s);
+ goto resume_from_trap;
}
recurse:
- if (primary_tag(nodeA) == TAG_PRIMARY_BOXED &&
- primary_tag(nodeB) == TAG_PRIMARY_LIST) {
+ if (primary_tag(ctx->nodeA) == TAG_PRIMARY_BOXED &&
+ primary_tag(ctx->nodeB) == TAG_PRIMARY_LIST) {
/* Avoid implementing this combination by switching places */
- Eterm tmp = nodeA;
- nodeA = nodeB;
- nodeB = tmp;
- keepA = !keepA;
+ Eterm tmp = ctx->nodeA;
+ ctx->nodeA = ctx->nodeB;
+ ctx->nodeB = tmp;
+ sp->keepA = !sp->keepA;
}
- switch (primary_tag(nodeA)) {
+ switch (primary_tag(ctx->nodeA)) {
case TAG_PRIMARY_LIST: {
- sp->srcA = list_val(nodeA);
- switch (primary_tag(nodeB)) {
+ Eterm keyA = CAR(list_val(ctx->nodeA));
+ switch (primary_tag(ctx->nodeB)) {
case TAG_PRIMARY_LIST: { /* LEAF + LEAF */
- sp->srcB = list_val(nodeB);
+ Eterm keyB = CAR(list_val(ctx->nodeB));
- if (EQ(CAR(sp->srcA), CAR(sp->srcB))) {
- --size;
- res = keepA ? nodeA : nodeB;
+ if (EQ(keyA, keyB)) {
+ --ctx->size;
+ ctx->res = sp->keepA ? ctx->nodeA : ctx->nodeB;
} else {
- ahx = hashmap_restore_hash(th, lvl, CAR(sp->srcA));
- bhx = hashmap_restore_hash(th, lvl, CAR(sp->srcB));
+ ahx = hashmap_restore_hash(th, ctx->lvl, keyA);
+ bhx = hashmap_restore_hash(th, ctx->lvl, keyB);
sp->abm = 1 << hashmap_index(ahx);
sp->bbm = 1 << hashmap_index(bhx);
- sp->srcA = &nodeA;
- sp->srcB = &nodeB;
+ sp->srcA = &ctx->nodeA;
+ sp->srcB = &ctx->nodeB;
}
break;
}
case TAG_PRIMARY_BOXED: { /* LEAF + NODE */
- sp->srcB = boxed_val(nodeB);
+ sp->srcB = boxed_val(ctx->nodeB);
ASSERT(is_header(*sp->srcB));
hdrB = *sp->srcB++;
- ahx = hashmap_restore_hash(th, lvl, CAR(sp->srcA));
+ ahx = hashmap_restore_hash(th, ctx->lvl, keyA);
sp->abm = 1 << hashmap_index(ahx);
- sp->srcA = &nodeA;
+ sp->srcA = &ctx->nodeA;
switch(hdrB & _HEADER_MAP_SUBTAG_MASK) {
case HAMT_SUBTAG_HEAD_ARRAY:
sp->srcB++;
@@ -1202,26 +1269,26 @@ recurse:
break;
default:
- erl_exit(1, "bad header tag %ld\r\n", *sp->srcB & _HEADER_MAP_SUBTAG_MASK);
+ erl_exit(ERTS_ABORT_EXIT, "bad header tag %ld\r\n", *sp->srcB & _HEADER_MAP_SUBTAG_MASK);
break;
}
break;
}
default:
- erl_exit(1, "bad primary tag %ld\r\n", nodeB);
+ erl_exit(ERTS_ABORT_EXIT, "bad primary tag %ld\r\n", ctx->nodeB);
}
break;
}
case TAG_PRIMARY_BOXED: { /* NODE + NODE */
- sp->srcA = boxed_val(nodeA);
+ sp->srcA = boxed_val(ctx->nodeA);
hdrA = *sp->srcA++;
ASSERT(is_header(hdrA));
switch (hdrA & _HEADER_MAP_SUBTAG_MASK) {
case HAMT_SUBTAG_HEAD_ARRAY: {
sp->srcA++;
- ASSERT(primary_tag(nodeB) == TAG_PRIMARY_BOXED);
+ ASSERT(primary_tag(ctx->nodeB) == TAG_PRIMARY_BOXED);
sp->abm = 0xffff;
- sp->srcB = boxed_val(nodeB);
+ sp->srcB = boxed_val(ctx->nodeB);
hdrB = *sp->srcB++;
ASSERT(is_header(hdrB));
switch (hdrB & _HEADER_MAP_SUBTAG_MASK) {
@@ -1240,9 +1307,9 @@ recurse:
}
case HAMT_SUBTAG_HEAD_BITMAP: sp->srcA++;
case HAMT_SUBTAG_NODE_BITMAP: {
- ASSERT(primary_tag(nodeB) == TAG_PRIMARY_BOXED);
+ ASSERT(primary_tag(ctx->nodeB) == TAG_PRIMARY_BOXED);
sp->abm = MAP_HEADER_VAL(hdrA);
- sp->srcB = boxed_val(nodeB);
+ sp->srcB = boxed_val(ctx->nodeB);
hdrB = *sp->srcB++;
ASSERT(is_header(hdrB));
switch (hdrB & _HEADER_MAP_SUBTAG_MASK) {
@@ -1256,40 +1323,44 @@ recurse:
break;
default:
- erl_exit(1, "bad header tag %ld\r\n", *sp->srcB & _HEADER_MAP_SUBTAG_MASK);
+ erl_exit(ERTS_ABORT_EXIT, "bad header tag %ld\r\n", *sp->srcB & _HEADER_MAP_SUBTAG_MASK);
}
break;
}
default:
- erl_exit(1, "bad primary tag %ld\r\n", nodeA);
+ erl_exit(ERTS_ABORT_EXIT, "bad primary tag %ld\r\n", ctx->nodeA);
}
break;
}
default:
- erl_exit(1, "bad primary tag %ld\r\n", nodeA);
+ erl_exit(ERTS_ABORT_EXIT, "bad primary tag %ld\r\n", ctx->nodeA);
}
for (;;) {
- if (is_value(res)) { /* We have a complete (sub-)tree or leaf */
- if (lvl == 0)
+ if (is_value(ctx->res)) { /* We have a complete (sub-)tree or leaf */
+ if (ctx->lvl == 0)
break;
/* Pop from stack and continue build parent node */
- lvl--;
+ ctx->lvl--;
sp = PSTACK_POP(s);
- sp->array[sp->ix++] = res;
- res = THE_NON_VALUE;
+ sp->array[sp->ix++] = ctx->res;
+ ctx->res = THE_NON_VALUE;
if (sp->rbm) {
sp->srcA++;
sp->srcB++;
- keepA = sp->keepA;
}
} else { /* Start build a node */
sp->ix = 0;
sp->rbm = sp->abm | sp->bbm;
- ASSERT(!(sp->rbm == 0 && lvl > 0));
+ ASSERT(!(sp->rbm == 0 && ctx->lvl > 0));
}
+ if (--reds <= 0) {
+ goto trap;
+ }
+resume_from_trap:
+
while (sp->rbm) {
Uint32 next = sp->rbm & (sp->rbm-1);
Uint32 bit = sp->rbm ^ next;
@@ -1297,13 +1368,12 @@ recurse:
if (sp->abm & bit) {
if (sp->bbm & bit) {
/* Bit clash. Push and resolve by recursive merge */
- if (sp->rbm) {
- sp->keepA = keepA;
- }
- nodeA = *sp->srcA;
- nodeB = *sp->srcB;
- lvl++;
+ int keepA = sp->keepA;
+ ctx->nodeA = *sp->srcA;
+ ctx->nodeB= *sp->srcB;
+ ctx->lvl++;
sp = PSTACK_PUSH(s);
+ sp->keepA = keepA;
goto recurse;
} else {
sp->array[sp->ix++] = *sp->srcA++;
@@ -1315,23 +1385,62 @@ recurse:
}
ASSERT(sp->ix == hashmap_bitcount(sp->abm | sp->bbm));
- if (lvl == 0) {
+ if (ctx->lvl == 0) {
nhp = HAllocX(p, HAMT_HEAD_BITMAP_SZ(sp->ix), HALLOC_EXTRA);
hp = nhp;
*hp++ = (sp->ix == 16 ? MAP_HEADER_HAMT_HEAD_ARRAY
: MAP_HEADER_HAMT_HEAD_BITMAP(sp->abm | sp->bbm));
- *hp++ = size;
+ *hp++ = ctx->size;
} else {
nhp = HAllocX(p, HAMT_NODE_BITMAP_SZ(sp->ix), HALLOC_EXTRA);
hp = nhp;
*hp++ = MAP_HEADER_HAMT_NODE_BITMAP(sp->abm | sp->bbm);
}
- memcpy(hp, sp->array, sp->ix * sizeof(Eterm));
- res = make_boxed(nhp);
+ sys_memcpy(hp, sp->array, sp->ix * sizeof(Eterm));
+ ctx->res = make_boxed(nhp);
+ }
+
+ /* Done */
+
+ if (ctx != &local_ctx) {
+ ASSERT(ctx->trap_bin != THE_NON_VALUE);
+ ASSERT(p->flags & F_DISABLE_GC);
+ erts_set_gc_state(p, 1);
+ }
+ else {
+ ASSERT(ctx->trap_bin == THE_NON_VALUE);
+ ASSERT(!(p->flags & F_DISABLE_GC));
}
PSTACK_DESTROY(s);
UnUseTmpHeap(2,p);
- return res;
+ BUMP_REDS(p, (initial_reds - reds) / MAP_MERGE_LOOP_FACTOR);
+ return ctx->res;
+
+trap: /* Yield */
+
+ if (ctx == &local_ctx) {
+ Binary* ctx_b = erts_create_magic_binary(sizeof(HashmapMergeContext),
+ hashmap_merge_ctx_destructor);
+ ctx = ERTS_MAGIC_BIN_DATA(ctx_b);
+ sys_memcpy(ctx, &local_ctx, sizeof(HashmapMergeContext));
+ hp = HAlloc(p, PROC_BIN_SIZE);
+ ASSERT(ctx->trap_bin == THE_NON_VALUE);
+ ctx->trap_bin = erts_mk_magic_binary_term(&hp, &MSO(p), ctx_b);
+
+ erts_set_gc_state(p, 0);
+ }
+ else {
+ ASSERT(ctx->trap_bin != THE_NON_VALUE);
+ ASSERT(p->flags & F_DISABLE_GC);
+ }
+
+ PSTACK_SAVE(s, &ctx->pstack);
+
+ BUMP_ALL_REDS(p);
+ ERTS_BIF_PREP_TRAP1(trap_ret, &hashmap_merge_trap_export,
+ p, ctx->trap_bin);
+ UnUseTmpHeap(2,p);
+ return trap_ret;
}
static int hash_cmp(Uint32 ha, Uint32 hb)
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 07806c823c..14d42599a1 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -817,7 +817,7 @@ do {\
UWord _pbytes = PSTACK_COUNT(s) * sizeof(PSTACK_TYPE);\
(dst)->pstart = erts_alloc(s.alloc_type,\
sizeof(PSTK_DEF_STACK(s)));\
- memcpy((dst)->pstart, s.pstart, _pbytes);\
+ sys_memcpy((dst)->pstart, s.pstart, _pbytes);\
(dst)->psp = (dst)->pstart + _pbytes - sizeof(PSTACK_TYPE);\
(dst)->pend = (dst)->pstart + sizeof(PSTK_DEF_STACK(s));\
(dst)->alloc_type = s.alloc_type;\
@@ -838,6 +838,14 @@ do { \
ASSERT(s.psp < s.pend); \
} while (0)
+#define PSTACK_DESTROY_SAVED(pstack)\
+do {\
+ if ((pstack)->pstart) {\
+ erts_free((pstack)->alloc_type, (pstack)->pstart);\
+ (pstack)->pstart = NULL;\
+ }\
+} while(0)
+
/* binary.c */
@@ -1126,6 +1134,9 @@ Sint erts_binary_set_loop_limit(Sint limit);
/* external.c */
void erts_init_external(void);
+/* erl_map.c */
+void erts_init_map(void);
+
/* erl_unicode.c */
void erts_init_unicode(void);
Sint erts_unicode_set_loop_limit(Sint limit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 03:08:58 +0000