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-rw-r--r--erts/emulator/beam/hash.c21
-rw-r--r--erts/emulator/beam/utils.c157
-rw-r--r--erts/emulator/test/map_SUITE.erl35
3 files changed, 125 insertions, 88 deletions
diff --git a/erts/emulator/beam/hash.c b/erts/emulator/beam/hash.c
index e255b961f1..cd038d100b 100644
--- a/erts/emulator/beam/hash.c
+++ b/erts/emulator/beam/hash.c
@@ -35,9 +35,9 @@
static const int h_size_table[] = {
2, 5, 11, 23, 47, 97, 197, 397, 797, /* double upto here */
1201, 1597,
- 2411, 3203,
+ 2411, 3203,
4813, 6421,
- 9643, 12853,
+ 9643, 12853,
19289, 25717,
51437,
102877,
@@ -49,8 +49,8 @@ static const int h_size_table[] = {
6584983,
13169977,
26339969,
- 52679969,
- -1
+ 52679969,
+ -1
};
/*
@@ -69,7 +69,7 @@ void hash_get_info(HashInfo *hi, Hash *h)
for (i = 0; i < size; i++) {
int depth = 0;
HashBucket* b = h->bucket[i];
-
+
while (b != (HashBucket*) 0) {
objects++;
depth++;
@@ -112,7 +112,7 @@ void hash_info(int to, void *arg, Hash* h)
/*
* Returns size of table in bytes. Stored objects not included.
*/
-int
+int
hash_table_sz(Hash *h)
{
int i;
@@ -190,7 +190,7 @@ void hash_delete(Hash* h)
HashBucket* b = h->bucket[i];
while (b != (HashBucket*) 0) {
HashBucket* b_next = b->next;
-
+
h->fun.free((void*) b);
b = b_next;
}
@@ -250,7 +250,7 @@ void* hash_get(Hash* h, void* tmpl)
HashValue hval = h->fun.hash(tmpl);
int ix = hval % h->size;
HashBucket* b = h->bucket[ix];
-
+
while(b != (HashBucket*) 0) {
if ((b->hvalue == hval) && (h->fun.cmp(tmpl, (void*)b) == 0))
return (void*) b;
@@ -294,7 +294,7 @@ void* hash_erase(Hash* h, void* tmpl)
int ix = hval % h->size;
HashBucket* b = h->bucket[ix];
HashBucket* prev = 0;
-
+
while(b != 0) {
if ((b->hvalue == hval) && (h->fun.cmp(tmpl, (void*)b) == 0)) {
if (prev != 0)
@@ -326,7 +326,7 @@ hash_remove(Hash *h, void *tmpl)
int ix = hval % h->size;
HashBucket *b = h->bucket[ix];
HashBucket *prev = NULL;
-
+
while (b) {
if ((b->hvalue == hval) && (h->fun.cmp(tmpl, (void*)b) == 0)) {
if (prev)
@@ -355,4 +355,3 @@ void hash_foreach(Hash* h, void (*func)(void *, void *), void *func_arg2)
}
}
}
-
diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c
index 675fafa726..85647b8500 100644
--- a/erts/emulator/beam/utils.c
+++ b/erts/emulator/beam/utils.c
@@ -85,7 +85,7 @@ erts_heap_alloc(Process* p, Uint need, Uint xtra)
&& HEAP_TOP(p) >= p->space_verified_from
&& HEAP_TOP(p) + need <= p->space_verified_from + p->space_verified
&& HEAP_LIMIT(p) - HEAP_TOP(p) >= need) {
-
+
Uint consumed = need + (HEAP_TOP(p) - p->space_verified_from);
ASSERT(consumed <= p->space_verified);
p->space_verified -= consumed;
@@ -638,7 +638,7 @@ erts_bld_atom_uword_2tup_list(Uint **hpp, Uint *szp,
ui = uint_to_big(uints[i], *hpp);
*hpp += BIG_UINT_HEAP_SIZE;
}
-
+
res = CONS(*hpp+3, TUPLE2(*hpp, atoms[i], ui), res);
*hpp += 5;
}
@@ -676,14 +676,14 @@ erts_bld_atom_2uint_3tup_list(Uint **hpp, Uint *szp, Sint length,
ui1 = uint_to_big(uints1[i], *hpp);
*hpp += BIG_UINT_HEAP_SIZE;
}
-
+
if (IS_USMALL(0, uints2[i]))
ui2 = make_small(uints2[i]);
else {
ui2 = uint_to_big(uints2[i], *hpp);
*hpp += BIG_UINT_HEAP_SIZE;
}
-
+
res = CONS(*hpp+4, TUPLE3(*hpp, atoms[i], ui1, ui2), res);
*hpp += 6;
}
@@ -794,7 +794,7 @@ hash_binary_bytes(Eterm bin, Uint sz, Uint32 hash)
Uint b;
Uint lshift = bitoffs;
Uint rshift = 8 - lshift;
-
+
while (sz--) {
b = (previous << lshift) & 0xFF;
previous = *ptr++;
@@ -805,7 +805,7 @@ hash_binary_bytes(Eterm bin, Uint sz, Uint32 hash)
b = (previous << lshift) & 0xFF;
previous = *ptr++;
b |= previous >> rshift;
-
+
b >>= 8 - bitsize;
hash = (hash*FUNNY_NUMBER1 + b) * FUNNY_NUMBER12 + bitsize;
}
@@ -835,21 +835,21 @@ Uint32 make_hash(Eterm term_arg)
do { \
Uint32 x = (Uint32) (Expr); \
hash = \
- (((((hash)*(Prime1) + (x & 0xFF)) * (Prime1) + \
- ((x >> 8) & 0xFF)) * (Prime1) + \
- ((x >> 16) & 0xFF)) * (Prime1) + \
+ (((((hash)*(Prime1) + (x & 0xFF)) * (Prime1) + \
+ ((x >> 8) & 0xFF)) * (Prime1) + \
+ ((x >> 16) & 0xFF)) * (Prime1) + \
(x >> 24)); \
} while(0)
-#define UINT32_HASH_RET(Expr, Prime1, Prime2) \
+#define UINT32_HASH_RET(Expr, Prime1, Prime2) \
UINT32_HASH_STEP(Expr, Prime1); \
hash = hash * (Prime2); \
- break
-
-
+ break
+
+
/*
* Significant additions needed for real 64 bit port with larger fixnums.
- */
+ */
/*
* Note, for the simple 64bit port, not utilizing the
@@ -864,7 +864,7 @@ tail_recur:
hash = hash*FUNNY_NUMBER3 + 1;
break;
case ATOM_DEF:
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(term))->slot.bucket.hvalue);
break;
case SMALL_DEF:
@@ -893,9 +893,9 @@ tail_recur:
Export* ep = *((Export **) (export_val(term) + 1));
hash = hash * FUNNY_NUMBER11 + ep->code[2];
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(ep->code[0]))->slot.bucket.hvalue);
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(ep->code[1]))->slot.bucket.hvalue);
break;
}
@@ -906,7 +906,7 @@ tail_recur:
Uint num_free = funp->num_free;
hash = hash * FUNNY_NUMBER10 + num_free;
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(funp->fe->module))->slot.bucket.hvalue);
hash = hash*FUNNY_NUMBER2 + funp->fe->old_index;
hash = hash*FUNNY_NUMBER2 + funp->fe->old_uniq;
@@ -931,7 +931,7 @@ tail_recur:
UINT32_HASH_RET(internal_ref_numbers(term)[0],FUNNY_NUMBER9,FUNNY_NUMBER10);
case EXTERNAL_REF_DEF:
UINT32_HASH_RET(external_ref_numbers(term)[0],FUNNY_NUMBER9,FUNNY_NUMBER10);
- case FLOAT_DEF:
+ case FLOAT_DEF:
{
FloatDef ff;
GET_DOUBLE(term, ff);
@@ -958,12 +958,12 @@ tail_recur:
** as multiplications on a Sparc is so slow.
*/
hash = hash*FUNNY_NUMBER2 + unsigned_val(*list);
-
+
if (is_not_list(CDR(list))) {
WSTACK_PUSH(stack, MAKE_HASH_CDR_POST_OP);
term = CDR(list);
goto tail_recur;
- }
+ }
list = list_val(CDR(list));
}
WSTACK_PUSH2(stack, CDR(list), MAKE_HASH_CDR_PRE_OP);
@@ -1004,17 +1004,17 @@ tail_recur:
}
hash *= is_neg ? FUNNY_NUMBER4 : FUNNY_NUMBER3;
break;
- }
+ }
case MAP_DEF:
hash = hash*FUNNY_NUMBER13 + FUNNY_NUMBER14 + make_hash2(term);
break;
- case TUPLE_DEF:
+ case TUPLE_DEF:
{
Eterm* ptr = tuple_val(term);
Uint arity = arityval(*ptr);
WSTACK_PUSH3(stack, (UWord) arity, (UWord)(ptr+1), (UWord) arity);
- op = MAKE_HASH_TUPLE_OP;
+ op = MAKE_HASH_TUPLE_OP;
}/*fall through*/
case MAKE_HASH_TUPLE_OP:
case MAKE_HASH_TERM_ARRAY_OP:
@@ -1031,8 +1031,8 @@ tail_recur:
hash = hash*FUNNY_NUMBER9 + arity;
}
break;
- }
-
+ }
+
default:
erts_exit(ERTS_ERROR_EXIT, "Invalid tag in make_hash(0x%X,0x%X)\n", term, op);
return 0;
@@ -1159,8 +1159,8 @@ make_hash2(Eterm term)
if (y < 0) { \
UINT32_HASH(-y, AConst); \
/* Negative numbers are unnecessarily mixed twice. */ \
- } \
- UINT32_HASH(y, AConst); \
+ } \
+ UINT32_HASH(y, AConst); \
} while(0)
#define IS_SSMALL28(x) (((Uint) (((x) >> (28-1)) + 1)) < 2)
@@ -1242,7 +1242,7 @@ make_hash2(Eterm term)
int arity = header_arity(hdr);
Eterm* elem = tuple_val(term);
UINT32_HASH(arity, HCONST_9);
- if (arity == 0) /* Empty tuple */
+ if (arity == 0) /* Empty tuple */
goto hash2_common;
for (i = arity; ; i--) {
term = elem[i];
@@ -1329,7 +1329,7 @@ make_hash2(Eterm term)
{
Export* ep = *((Export **) (export_val(term) + 1));
UINT32_HASH_2
- (ep->code[2],
+ (ep->code[2],
atom_tab(atom_val(ep->code[0]))->slot.bucket.hvalue,
HCONST);
UINT32_HASH
@@ -1343,7 +1343,7 @@ make_hash2(Eterm term)
ErlFunThing* funp = (ErlFunThing *) fun_val(term);
Uint num_free = funp->num_free;
UINT32_HASH_2
- (num_free,
+ (num_free,
atom_tab(atom_val(funp->fe->module))->slot.bucket.hvalue,
HCONST);
UINT32_HASH_2
@@ -1468,7 +1468,7 @@ make_hash2(Eterm term)
goto hash2_common;
}
break;
-
+
default:
erts_exit(ERTS_ERROR_EXIT, "Invalid tag in make_hash2(0x%X)\n", term);
}
@@ -1541,7 +1541,7 @@ make_hash2(Eterm term)
}
case HASH_MAP_PAIR:
hash_xor_pairs ^= hash;
- hash = 0;
+ hash = 0;
goto hash2_common;
default:
break;
@@ -1678,17 +1678,22 @@ make_internal_hash(Eterm term)
* the order in which keys and values are encountered.
* We therefore calculate context independent hashes for all .
* key-value pairs and then xor them together.
+ *
+ * We *do* need to use an initial seed for each pair, i.e. the
+ * hash value, so the hash value is reset for each pair with 'hash'.
+ * If we don't, no additional entropy is given to the system and the
+ * hash collision resolution in maps:from_list/1 would fail.
*/
ESTACK_PUSH(s, hash_xor_pairs);
ESTACK_PUSH(s, hash);
ESTACK_PUSH(s, HASH_MAP_TAIL);
- hash = 0;
- hash_xor_pairs = 0;
for (i = size - 1; i >= 0; i--) {
+ ESTACK_PUSH(s, hash); /* initial seed for all pairs */
ESTACK_PUSH(s, HASH_MAP_PAIR);
ESTACK_PUSH(s, vs[i]);
ESTACK_PUSH(s, ks[i]);
}
+ hash_xor_pairs = 0;
goto pop_next;
}
case HAMT_SUBTAG_HEAD_ARRAY:
@@ -1700,7 +1705,6 @@ make_internal_hash(Eterm term)
ESTACK_PUSH(s, hash_xor_pairs);
ESTACK_PUSH(s, hash);
ESTACK_PUSH(s, HASH_MAP_TAIL);
- hash = 0;
hash_xor_pairs = 0;
}
switch (hdr & _HEADER_MAP_SUBTAG_MASK) {
@@ -1717,6 +1721,7 @@ make_internal_hash(Eterm term)
while (i) {
if (is_list(*ptr)) {
Eterm* cons = list_val(*ptr);
+ ESTACK_PUSH(s, hash); /* initial seed for all pairs */
ESTACK_PUSH(s, HASH_MAP_PAIR);
ESTACK_PUSH(s, CDR(cons));
ESTACK_PUSH(s, CAR(cons));
@@ -1906,6 +1911,7 @@ make_internal_hash(Eterm term)
pop_next:
if (ESTACK_ISEMPTY(s)) {
DESTROY_ESTACK(s);
+
return hash;
}
@@ -1920,7 +1926,7 @@ make_internal_hash(Eterm term)
}
case HASH_MAP_PAIR:
hash_xor_pairs ^= hash;
- hash = 0;
+ hash = (Uint32) ESTACK_POP(s); /* initial seed for all pairs */
goto pop_next;
case HASH_CDR:
@@ -1953,8 +1959,8 @@ Uint32 make_broken_hash(Eterm term)
DECLARE_WSTACK(stack);
unsigned op;
tail_recur:
- op = tag_val_def(term);
- for (;;) {
+ op = tag_val_def(term);
+ for (;;) {
switch (op) {
case NIL_DEF:
hash = hash*FUNNY_NUMBER3 + 1;
@@ -1976,8 +1982,7 @@ tail_recur:
{ /* like a bignum */
Uint32 y4 = (Uint32) y2;
hash = hash*FUNNY_NUMBER2 + ((y4 << 16) | (y4 >> 16));
- if (y3)
- {
+ if (y3) {
hash = hash*FUNNY_NUMBER2 + ((y3 << 16) | (y3 >> 16));
arity++;
}
@@ -2020,9 +2025,9 @@ tail_recur:
Export* ep = *((Export **) (export_val(term) + 1));
hash = hash * FUNNY_NUMBER11 + ep->code[2];
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(ep->code[0]))->slot.bucket.hvalue);
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(ep->code[1]))->slot.bucket.hvalue);
break;
}
@@ -2033,7 +2038,7 @@ tail_recur:
Uint num_free = funp->num_free;
hash = hash * FUNNY_NUMBER10 + num_free;
- hash = hash*FUNNY_NUMBER1 +
+ hash = hash*FUNNY_NUMBER1 +
(atom_tab(atom_val(funp->fe->module))->slot.bucket.hvalue);
hash = hash*FUNNY_NUMBER2 + funp->fe->old_index;
hash = hash*FUNNY_NUMBER2 + funp->fe->old_uniq;
@@ -2065,7 +2070,7 @@ tail_recur:
case EXTERNAL_REF_DEF:
hash = hash*FUNNY_NUMBER9 + external_ref_numbers(term)[0];
break;
- case FLOAT_DEF:
+ case FLOAT_DEF:
{
FloatDef ff;
GET_DOUBLE(term, ff);
@@ -2149,7 +2154,7 @@ tail_recur:
}
#else
-#error "unsupported D_EXP size"
+#error "unsupported D_EXP size"
#endif
hash = hash * (is_neg ? FUNNY_NUMBER3 : FUNNY_NUMBER2) + arity;
}
@@ -2158,14 +2163,14 @@ tail_recur:
case MAP_DEF:
hash = hash*FUNNY_NUMBER13 + FUNNY_NUMBER14 + make_hash2(term);
break;
- case TUPLE_DEF:
+ case TUPLE_DEF:
{
Eterm* ptr = tuple_val(term);
Uint arity = arityval(*ptr);
WSTACK_PUSH3(stack, (UWord) arity, (UWord) (ptr+1), (UWord) arity);
op = MAKE_HASH_TUPLE_OP;
- }/*fall through*/
+ }/*fall through*/
case MAKE_HASH_TUPLE_OP:
case MAKE_HASH_TERM_ARRAY_OP:
{
@@ -2193,7 +2198,7 @@ tail_recur:
DESTROY_WSTACK(stack);
return hash;
-
+
#undef MAKE_HASH_TUPLE_OP
#undef MAKE_HASH_TERM_ARRAY_OP
#undef MAKE_HASH_CDR_PRE_OP
@@ -2353,13 +2358,13 @@ static int do_send_term_to_logger(Eterm tag, Eterm gleader,
}
static ERTS_INLINE int
-send_info_to_logger(Eterm gleader, char *buf, int len)
+send_info_to_logger(Eterm gleader, char *buf, int len)
{
return do_send_to_logger(am_info_msg, gleader, buf, len);
}
static ERTS_INLINE int
-send_warning_to_logger(Eterm gleader, char *buf, int len)
+send_warning_to_logger(Eterm gleader, char *buf, int len)
{
Eterm tag;
switch (erts_error_logger_warnings) {
@@ -2371,7 +2376,7 @@ send_warning_to_logger(Eterm gleader, char *buf, int len)
}
static ERTS_INLINE int
-send_error_to_logger(Eterm gleader, char *buf, int len)
+send_error_to_logger(Eterm gleader, char *buf, int len)
{
return do_send_to_logger(am_error, gleader, buf, len);
}
@@ -2613,7 +2618,7 @@ tailrecur_ne:
break; /* not equal */
case TAG_PRIMARY_BOXED:
- {
+ {
Eterm hdr = *boxed_val(a);
switch (hdr & _TAG_HEADER_MASK) {
case ARITYVAL_SUBTAG:
@@ -2639,7 +2644,7 @@ tailrecur_ne:
Uint b_bitsize;
Uint a_bitoffs;
Uint b_bitoffs;
-
+
if (!is_binary(b)) {
goto not_equal;
}
@@ -2671,7 +2676,7 @@ tailrecur_ne:
{
ErlFunThing* f1;
ErlFunThing* f2;
-
+
if (!is_fun(b))
goto not_equal;
f1 = (ErlFunThing *) fun_val(a);
@@ -2702,7 +2707,7 @@ tailrecur_ne:
if(ap->header == bp->header && ap->node == bp->node) {
ASSERT(1 == external_data_words(a));
ASSERT(1 == external_data_words(b));
-
+
if (ap->data.ui[0] == bp->data.ui[0]) goto pop_next;
}
break; /* not equal */
@@ -2759,7 +2764,7 @@ tailrecur_ne:
if (alen == 3 && blen == 3) {
/* Most refs are of length 3 */
if (anum[1] == bnum[1] && anum[2] == bnum[2]) {
- goto pop_next;
+ goto pop_next;
} else {
goto not_equal;
}
@@ -2784,7 +2789,7 @@ tailrecur_ne:
for (i = common_len; i < blen; i++)
if (bnum[i] != 0)
goto not_equal;
- }
+ }
}
goto pop_next;
}
@@ -2792,7 +2797,7 @@ tailrecur_ne:
case NEG_BIG_SUBTAG:
{
int i;
-
+
if (!is_big(b))
goto not_equal;
aa = big_val(a);
@@ -2810,7 +2815,7 @@ tailrecur_ne:
{
FloatDef af;
FloatDef bf;
-
+
if (is_float(b)) {
GET_DOUBLE(a, af);
GET_DOUBLE(b, bf);
@@ -2889,7 +2894,7 @@ term_array: /* arrays in 'aa' and 'bb', length in 'sz' */
}
goto tailrecur_ne;
}
-
+
pop_next:
if (!WSTACK_ISEMPTY(stack)) {
UWord something = WSTACK_POP(stack);
@@ -3093,7 +3098,7 @@ tailrecur_ne:
}
anode = erts_this_node;
adata = internal_port_data(a);
-
+
port_common:
CMP_NODES(anode, bnode);
ON_CMP_GOTO((Sint)(adata - bdata));
@@ -3111,7 +3116,7 @@ tailrecur_ne:
}
anode = erts_this_node;
adata = internal_pid_data(a);
-
+
pid_common:
if (adata != bdata) {
RETURN_NEQ(adata < bdata ? -1 : 1);
@@ -3336,7 +3341,7 @@ tailrecur_ne:
diff = f1->num_free - f2->num_free;
if (diff != 0) {
RETURN_NEQ(diff);
- }
+ }
i = f1->num_free;
if (i == 0) goto pop_next;
aa = f1->env;
@@ -3397,10 +3402,10 @@ tailrecur_ne:
anum = internal_thing_ref_numbers(athing);
alen = internal_thing_ref_no_of_numbers(athing);
}
-
+
ref_common:
CMP_NODES(anode, bnode);
-
+
ASSERT(alen > 0 && blen > 0);
if (alen != blen) {
if (alen > blen) {
@@ -3418,7 +3423,7 @@ tailrecur_ne:
} while (alen < blen);
}
}
-
+
ASSERT(alen == blen);
for (i = (Sint) alen - 1; i >= 0; i--)
if (anum[i] != bnum[i])
@@ -3633,8 +3638,8 @@ term_array: /* arrays in 'aa' and 'bb', length in 'i' */
}
a = *aa;
b = *bb;
- goto tailrecur;
-
+ goto tailrecur;
+
pop_next:
if (!WSTACK_ISEMPTY(stack)) {
UWord something = WSTACK_POP(stack);
@@ -3897,19 +3902,19 @@ intlist_to_buf(Eterm list, char *buf, Sint len)
Eterm* listptr;
Sint sz = 0;
- if (is_nil(list))
+ if (is_nil(list))
return 0;
if (is_not_list(list))
return -1;
listptr = list_val(list);
while (sz < len) {
- if (!is_byte(*listptr))
+ if (!is_byte(*listptr))
return -1;
buf[sz++] = unsigned_val(*listptr);
if (is_nil(*(listptr + 1)))
return(sz);
- if (is_not_list(*(listptr + 1)))
+ if (is_not_list(*(listptr + 1)))
return -1;
listptr = list_val(*(listptr + 1));
}
@@ -4157,10 +4162,10 @@ do { \
} else if (yield_support && --yield_count <= 0)
goto L_yield;
}
-
+
res = len;
- L_return:
+ L_return:
DESTROY_ESTACK(s);
@@ -5053,7 +5058,7 @@ Process *p;
if(p)
print_process_info(ERTS_PRINT_STDERR, NULL, p);
}
-
+
void ppi(Eterm pid)
{
pp(erts_proc_lookup(pid));
@@ -5079,5 +5084,3 @@ ps(Process* p, Eterm* stop)
}
}
#endif
-
-
diff --git a/erts/emulator/test/map_SUITE.erl b/erts/emulator/test/map_SUITE.erl
index b3870f0313..5af676c409 100644
--- a/erts/emulator/test/map_SUITE.erl
+++ b/erts/emulator/test/map_SUITE.erl
@@ -77,6 +77,7 @@
t_ets/1,
t_dets/1,
t_tracing/1,
+ t_hash_entropy/1,
%% instruction-level tests
t_has_map_fields/1,
@@ -140,6 +141,7 @@ all() -> [t_build_and_match_literals, t_build_and_match_literals_large,
t_pdict,
t_ets,
t_tracing,
+ t_hash_entropy,
%% instruction-level tests
t_has_map_fields,
@@ -3020,6 +3022,39 @@ do_badmap_17(Config) ->
id(I) -> I.
+%% OTP-13763
+t_hash_entropy(Config) when is_list(Config) ->
+ %% entropy bug in 18.3, 19.0
+ M1 = maps:from_list([{#{"id" => I}, ok}||I <- lists:seq(1,50000)]),
+
+ #{ #{"id" => 100} := ok,
+ #{"id" => 200} := ok,
+ #{"id" => 300} := ok,
+ #{"id" => 400} := ok,
+ #{"id" => 500} := ok,
+ #{"id" => 600} := ok,
+ #{"id" => 700} := ok,
+ #{"id" => 800} := ok,
+ #{"id" => 900} := ok,
+ #{"id" => 25061} := ok,
+ #{"id" => 39766} := ok } = M1,
+
+ M0 = maps:from_list([{I,ok}||I <- lists:seq(1,33)]),
+ M2 = maps:from_list([{M0#{"id" => I}, ok}||I <- lists:seq(1,50000)]),
+
+ ok = maps:get(M0#{"id" => 100}, M2),
+ ok = maps:get(M0#{"id" => 200}, M2),
+ ok = maps:get(M0#{"id" => 300}, M2),
+ ok = maps:get(M0#{"id" => 400}, M2),
+ ok = maps:get(M0#{"id" => 500}, M2),
+ ok = maps:get(M0#{"id" => 600}, M2),
+ ok = maps:get(M0#{"id" => 700}, M2),
+ ok = maps:get(M0#{"id" => 800}, M2),
+ ok = maps:get(M0#{"id" => 900}, M2),
+ ok = maps:get(M0#{"id" => 25061}, M2),
+ ok = maps:get(M0#{"id" => 39766}, M2),
+ ok.
+
%% OTP-13146
%% Provoke major GC with a lot of "fat" maps on external format in msg queue
%% causing heap fragments to be allocated.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 15:22:52 +0000