aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator
diff options
context:
space:
mode:
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/erl_db_hash.c63
-rw-r--r--erts/emulator/beam/erl_db_tree.c52
-rw-r--r--erts/emulator/beam/erl_db_util.c94
-rw-r--r--erts/emulator/beam/erl_db_util.h1
4 files changed, 177 insertions, 33 deletions
diff --git a/erts/emulator/beam/erl_db_hash.c b/erts/emulator/beam/erl_db_hash.c
index 44d11dd5e7..ac31569181 100644
--- a/erts/emulator/beam/erl_db_hash.c
+++ b/erts/emulator/beam/erl_db_hash.c
@@ -355,6 +355,9 @@ static ERTS_INLINE void SET_SEGTAB(DbTableHash* tb,
erts_smp_atomic_set_nob(&tb->segtab, (erts_aint_t) segtab);
}
+/* Used by select_replace on analyze_pattern */
+typedef int (*extra_match_validator_t)(int keypos, Eterm match, Eterm guard, Eterm body);
+
/*
** Forward decl's (static functions)
*/
@@ -369,8 +372,9 @@ static void shrink(DbTableHash* tb, int nitems);
static void grow(DbTableHash* tb, int nitems);
static Eterm build_term_list(Process* p, HashDbTerm* ptr1, HashDbTerm* ptr2,
Uint sz, DbTableHash*);
-static int analyze_pattern(DbTableHash *tb, Eterm pattern,
- struct mp_info *mpi);
+static int analyze_pattern(DbTableHash *tb, Eterm pattern,
+ extra_match_validator_t extra_validator, /* Optional callback */
+ struct mp_info *mpi);
/*
* Method interface functions
@@ -1202,7 +1206,9 @@ typedef int (*mtraversal_on_trap_t)(void* context_ptr, Sint slot_ix, Sint got, B
/*
* Begin hash table match traversal
*/
-static int match_traverse(Process* p, DbTableHash* tb, Eterm pattern,
+static int match_traverse(Process* p, DbTableHash* tb,
+ Eterm pattern,
+ extra_match_validator_t extra_match_validator, /* Optional */
Sint chunk_size, /* If 0, no chunking */
Sint iterations_left, /* Nr. of iterations left */
Eterm** hpp, /* Heap */
@@ -1240,7 +1246,9 @@ static int match_traverse(Process* p, DbTableHash* tb, Eterm pattern,
*ret = NIL;
- if ((ret_value = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) {
+ if ((ret_value = analyze_pattern(tb, pattern, extra_match_validator, &mpi))
+ != DB_ERROR_NONE)
+ {
goto done;
}
@@ -1713,7 +1721,9 @@ static int db_select_chunk_hash(Process *p, DbTable *tbl, Eterm tid, Eterm patte
sc_context.prev_continuation_tptr = NULL;
return match_traverse(
- sc_context.p, sc_context.tb, pattern, sc_context.chunk_size,
+ sc_context.p, sc_context.tb,
+ pattern, NULL,
+ sc_context.chunk_size,
MAX_SELECT_CHUNK_ITERATIONS,
&sc_context.hp, 0,
mtraversal_select_chunk_on_nothing_can_match,
@@ -1906,8 +1916,8 @@ static int db_select_count_hash(Process *p, DbTable *tbl, Eterm tid, Eterm patte
return match_traverse(
scnt_context.p, scnt_context.tb,
- pattern, chunk_size,
- iterations_left, NULL, 0,
+ pattern, NULL,
+ chunk_size, iterations_left, NULL, 0,
mtraversal_select_count_on_nothing_can_match,
mtraversal_select_count_on_match_res,
mtraversal_select_count_on_loop_ended,
@@ -2046,7 +2056,9 @@ static int db_select_delete_hash(Process *p, DbTable *tbl, Eterm tid, Eterm patt
sd_context.last_pseudo_delete = (Uint) -1;
return match_traverse(
- sd_context.p, sd_context.tb, pattern, chunk_size,
+ sd_context.p, sd_context.tb,
+ pattern, NULL,
+ chunk_size,
MAX_SELECT_DELETE_ITERATIONS, NULL, 1,
mtraversal_select_delete_on_nothing_can_match,
mtraversal_select_delete_on_match_res,
@@ -2120,15 +2132,18 @@ static int mtraversal_select_replace_on_match_res(void* context_ptr, Sint slot_i
{
mtraversal_select_replace_context_t* sr_context_ptr = (mtraversal_select_replace_context_t*) context_ptr;
DbTableHash* tb = sr_context_ptr->tb;
+#ifdef DEBUG
Eterm key = NIL;
+#endif
HashDbTerm* new = NULL;
HashDbTerm* next = NULL;
HashValue hval = INVALID_HASH;
- if (is_value(match_res) &&
- is_value(key = db_getkey(tb->common.keypos, match_res)) &&
- eq(key, GETKEY(tb, (**current_ptr_ptr)->dbterm.tpl)))
- {
+ if (is_value(match_res)) {
+#ifdef DEBUG
+ ASSERT(is_value(key = db_getkey(tb->common.keypos, match_res)));
+ ASSERT(eq(key, GETKEY(tb, (**current_ptr_ptr)->dbterm.tpl)));
+#endif
next = (**current_ptr_ptr)->next;
hval = (**current_ptr_ptr)->hvalue;
new = replace_dbterm(tb, **current_ptr_ptr, match_res);
@@ -2184,7 +2199,9 @@ static int db_select_replace_hash(Process *p, DbTable *tbl, Eterm pattern, Eterm
sr_context.prev_continuation_tptr = NULL;
return match_traverse(
- sr_context.p, sr_context.tb, pattern, chunk_size,
+ sr_context.p, sr_context.tb,
+ pattern, db_match_keeps_key,
+ chunk_size,
MAX_SELECT_REPLACE_ITERATIONS, NULL, 1,
mtraversal_select_replace_on_nothing_can_match,
mtraversal_select_replace_on_match_res,
@@ -2428,7 +2445,8 @@ static SWord db_free_table_continue_hash(DbTable *tbl, SWord reds)
** slots should be searched. Also compiles the match program
*/
static int analyze_pattern(DbTableHash *tb, Eterm pattern,
- struct mp_info *mpi)
+ extra_match_validator_t extra_validator, /* Optional callback */
+ struct mp_info *mpi)
{
Eterm *ptpl;
Eterm lst, tpl, ttpl;
@@ -2466,7 +2484,10 @@ static int analyze_pattern(DbTableHash *tb, Eterm pattern,
i = 0;
for(lst = pattern; is_list(lst); lst = CDR(list_val(lst))) {
- Eterm body;
+ Eterm match = NIL;
+ Eterm guard = NIL;
+ Eterm body = NIL;
+
ttpl = CAR(list_val(lst));
if (!is_tuple(ttpl)) {
if (buff != sbuff) {
@@ -2481,9 +2502,17 @@ static int analyze_pattern(DbTableHash *tb, Eterm pattern,
}
return DB_ERROR_BADPARAM;
}
- matches[i] = tpl = ptpl[1];
- guards[i] = ptpl[2];
+ matches[i] = match = tpl = ptpl[1];
+ guards[i] = guard = ptpl[2];
bodies[i] = body = ptpl[3];
+
+ if(extra_validator != NULL && !extra_validator(tb->common.keypos, match, guard, body)) {
+ if (buff != sbuff) {
+ erts_free(ERTS_ALC_T_DB_TMP, buff);
+ }
+ return DB_ERROR_BADPARAM;
+ }
+
if (!is_list(body) || CDR(list_val(body)) != NIL ||
CAR(list_val(body)) != am_DollarUnderscore) {
mpi->all_objects = 0;
diff --git a/erts/emulator/beam/erl_db_tree.c b/erts/emulator/beam/erl_db_tree.c
index fea888b12d..949f8c46b6 100644
--- a/erts/emulator/beam/erl_db_tree.c
+++ b/erts/emulator/beam/erl_db_tree.c
@@ -300,6 +300,9 @@ struct select_replace_context {
Sint replaced;
};
+/* Used by select_replace on analyze_pattern */
+typedef int (*extra_match_validator_t)(int keypos, Eterm match, Eterm guard, Eterm body);
+
/*
** Forward declarations
*/
@@ -351,7 +354,8 @@ static Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key);
static Sint do_cmp_partly_bound(Eterm a, Eterm b, int *done);
static int analyze_pattern(DbTableTree *tb, Eterm pattern,
- struct mp_info *mpi);
+ extra_match_validator_t extra_validator, /* Optional callback */
+ struct mp_info *mpi);
static int doit_select(DbTableTree *tb,
TreeDbTerm *this,
void *ptr,
@@ -1132,7 +1136,7 @@ static int db_select_tree(Process *p, DbTable *tbl, Eterm tid,
sc.got = 0;
sc.chunk_size = 0;
- if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) {
+ if ((errcode = analyze_pattern(tb, pattern, NULL, &mpi)) != DB_ERROR_NONE) {
RET_TO_BIF(NIL,errcode);
}
@@ -1335,7 +1339,7 @@ static int db_select_count_tree(Process *p, DbTable *tbl, Eterm tid,
sc.keypos = tb->common.keypos;
sc.got = 0;
- if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) {
+ if ((errcode = analyze_pattern(tb, pattern, NULL, &mpi)) != DB_ERROR_NONE) {
RET_TO_BIF(NIL,errcode);
}
@@ -1438,7 +1442,7 @@ static int db_select_chunk_tree(Process *p, DbTable *tbl, Eterm tid,
sc.got = 0;
sc.chunk_size = chunk_size;
- if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) {
+ if ((errcode = analyze_pattern(tb, pattern, NULL, &mpi)) != DB_ERROR_NONE) {
RET_TO_BIF(NIL,errcode);
}
@@ -1680,7 +1684,7 @@ static int db_select_delete_tree(Process *p, DbTable *tbl, Eterm tid,
sc.keypos = tb->common.keypos;
sc.tb = tb;
- if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) {
+ if ((errcode = analyze_pattern(tb, pattern, NULL, &mpi)) != DB_ERROR_NONE) {
RET_TO_BIF(0,errcode);
}
@@ -1872,7 +1876,7 @@ static int db_select_replace_tree(Process *p, DbTable *tbl,
sc.keypos = tb->common.keypos;
sc.replaced = 0;
- if ((errcode = analyze_pattern(tb, pattern, &mpi)) != DB_ERROR_NONE) {
+ if ((errcode = analyze_pattern(tb, pattern, db_match_keeps_key, &mpi)) != DB_ERROR_NONE) {
RET_TO_BIF(NIL,errcode);
}
@@ -2193,8 +2197,9 @@ static TreeDbTerm *linkout_object_tree(DbTableTree *tb,
** For the select functions, analyzes the pattern and determines which
** part of the tree should be searched. Also compiles the match program
*/
-static int analyze_pattern(DbTableTree *tb, Eterm pattern,
- struct mp_info *mpi)
+static int analyze_pattern(DbTableTree *tb, Eterm pattern,
+ extra_match_validator_t extra_validator, /* Optional callback */
+ struct mp_info *mpi)
{
Eterm lst, tpl, ttpl;
Eterm *matches,*guards, *bodies;
@@ -2232,7 +2237,10 @@ static int analyze_pattern(DbTableTree *tb, Eterm pattern,
i = 0;
for(lst = pattern; is_list(lst); lst = CDR(list_val(lst))) {
- Eterm body;
+ Eterm match = NIL;
+ Eterm guard = NIL;
+ Eterm body = NIL;
+
ttpl = CAR(list_val(lst));
if (!is_tuple(ttpl)) {
if (buff != sbuff) {
@@ -2247,9 +2255,17 @@ static int analyze_pattern(DbTableTree *tb, Eterm pattern,
}
return DB_ERROR_BADPARAM;
}
- matches[i] = tpl = ptpl[1];
- guards[i] = ptpl[2];
+ matches[i] = match = tpl = ptpl[1];
+ guards[i] = guard = ptpl[2];
bodies[i] = body = ptpl[3];
+
+ if(extra_validator != NULL && !extra_validator(tb->common.keypos, match, guard, body)) {
+ if (buff != sbuff) {
+ erts_free(ERTS_ALC_T_DB_TMP, buff);
+ }
+ return DB_ERROR_BADPARAM;
+ }
+
if (!is_list(body) || CDR(list_val(body)) != NIL ||
CAR(list_val(body)) != am_DollarUnderscore) {
mpi->all_objects = 0;
@@ -3443,7 +3459,10 @@ static int doit_select_replace(DbTableTree *tb, TreeDbTerm **this, void *ptr,
int forward)
{
struct select_replace_context *sc = (struct select_replace_context *) ptr;
- Eterm ret, key;
+ Eterm ret = NIL;
+#ifdef DEBUG
+ Eterm key = NIL;
+#endif
sc->lastobj = (*this)->dbterm.tpl;
@@ -3456,10 +3475,11 @@ static int doit_select_replace(DbTableTree *tb, TreeDbTerm **this, void *ptr,
ret = db_match_dbterm(&tb->common, sc->p, sc->mp, 0,
&(*this)->dbterm, NULL, 0);
- if (is_value(ret) &&
- is_value(key = db_getkey(tb->common.keypos, ret)) &&
- (cmp_key(tb, key, *this) == 0))
- {
+ if (is_value(ret)) {
+#ifdef DEBUG
+ ASSERT(is_value(key = db_getkey(tb->common.keypos, ret)));
+ ASSERT(cmp_key(tb, key, *this) == 0);
+#endif
*this = replace_dbterm(tb, *this, ret);
sc->lastobj = (*this)->dbterm.tpl;
++(sc->replaced);
diff --git a/erts/emulator/beam/erl_db_util.c b/erts/emulator/beam/erl_db_util.c
index 6f30b1d3dd..3b2e7f4407 100644
--- a/erts/emulator/beam/erl_db_util.c
+++ b/erts/emulator/beam/erl_db_util.c
@@ -1119,6 +1119,100 @@ error:
return NULL;
}
+/* This is used by select_replace */
+int db_match_keeps_key(int keypos, Eterm match, Eterm guard, Eterm body) {
+ Eterm match_key = NIL;
+ int match_key_variable = -1;
+ Eterm* body_list = NULL;
+ Eterm single_body_term = NIL;
+ Eterm* single_body_term_tpl = NULL;
+ Eterm single_body_subterm = NIL;
+ Eterm single_body_subterm_key = NIL;
+ int single_body_subterm_key_variable = -1;
+ Eterm* single_body_subterm_key_tpl = NULL;
+
+ if (!is_list(body)) {
+ return 0;
+ }
+
+ body_list = list_val(body);
+ if (CDR(body_list) != NIL) {
+ return 0;
+ }
+
+ single_body_term = CAR(body_list);
+ if (single_body_term == am_DollarUnderscore) {
+ /* same tuple is returned */
+ return 1;
+ }
+
+ if (!is_tuple(single_body_term)) {
+ return 0;
+ }
+
+ single_body_term_tpl = tuple_val(single_body_term);
+ if (arityval(*single_body_term_tpl) != 1) {
+ // not the 1-element tuple we're expecting
+ return 0;
+ }
+
+ match_key = db_getkey(keypos, match);
+ if (!is_value(match_key)) {
+ // can't get key out of match
+ return 0;
+ }
+
+ single_body_subterm = single_body_term_tpl[1];
+ single_body_subterm_key = db_getkey(keypos, single_body_subterm);
+ if (!is_value(single_body_subterm_key)) {
+ // can't get key out of single body subterm
+ return 0;
+ }
+
+ match_key_variable = db_is_variable(match_key);
+ single_body_subterm_key_variable = db_is_variable(single_body_subterm_key);
+ if (match_key_variable != -1 && match_key_variable == single_body_subterm_key_variable) {
+ /* tuple with same key is returned */
+ return 1;
+ }
+
+ if (!is_tuple(single_body_subterm_key)) {
+ /* can't possibly be an element instruction */
+ return 0;
+ }
+
+ single_body_subterm_key_tpl = tuple_val(single_body_subterm_key);
+ if (arityval(*single_body_subterm_key_tpl) != 3) {
+ /* can't possibly be an element instruction */
+ return 0;
+ }
+
+ if (single_body_subterm_key_tpl[1] != am_element) {
+ /* tag is not of an element instruction */
+ return 0;
+ }
+ if (single_body_subterm_key_tpl[3] != am_DollarUnderscore) {
+ /* even if it's an element instruction, it's not fetching from the original tuple */
+ return 0;
+ }
+
+ if (is_big(single_body_subterm_key_tpl[2])
+ && (big_to_uint32(single_body_subterm_key_tpl[2]) != keypos))
+ {
+ /* the key comes from a different position */
+ return 0;
+ }
+
+ if (is_small(single_body_subterm_key_tpl[2])
+ && (unsigned_val(single_body_subterm_key_tpl[2]) != keypos))
+ {
+ /* the key comes from a different position */
+ return 0;
+ }
+
+ return 1;
+}
+
/* This is used when tracing */
Eterm erts_match_set_lint(Process *p, Eterm matchexpr) {
return db_match_set_lint(p, matchexpr, DCOMP_TRACE);
diff --git a/erts/emulator/beam/erl_db_util.h b/erts/emulator/beam/erl_db_util.h
index 89ef79d2dc..1a84f20e5d 100644
--- a/erts/emulator/beam/erl_db_util.h
+++ b/erts/emulator/beam/erl_db_util.h
@@ -382,6 +382,7 @@ Eterm db_add_counter(Eterm** hpp, Wterm counter, Eterm incr);
Eterm db_match_set_lint(Process *p, Eterm matchexpr, Uint flags);
Binary *db_match_set_compile(Process *p, Eterm matchexpr,
Uint flags);
+int db_match_keeps_key(int keypos, Eterm match, Eterm guard, Eterm body);
int erts_db_match_prog_destructor(Binary *);
typedef struct match_prog {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 21:13:23 +0000