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authorSverker Eriksson <[email protected]>2017-03-28 17:49:10 +0200
committerSverker Eriksson <[email protected]>2017-03-28 17:49:10 +0200
commiteb9fc2a4361037f06991d30f697f0e3ff6394117 (patch)
treec2918e5e493e6359bd33472099a890f8c0c66998 /erts/emulator
parent44b5223489576a6ec719cbdb3bbdb31624326a32 (diff)
downloadotp-eb9fc2a4361037f06991d30f697f0e3ff6394117.tar.gz
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Fix use of uninitialized variable 'ret'
DID_TRAP will read 'ret' even when error is returned. Found by valgrind.
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/erl_db_hash.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/erts/emulator/beam/erl_db_hash.c b/erts/emulator/beam/erl_db_hash.c
index b58fe7a185..7ab27df00c 100644
--- a/erts/emulator/beam/erl_db_hash.c
+++ b/erts/emulator/beam/erl_db_hash.c
@@ -1247,6 +1247,7 @@ static int match_traverse(Process* p, DbTableHash* tb,
if ((ret_value = analyze_pattern(tb, pattern, extra_match_validator, &mpi))
!= DB_ERROR_NONE)
{
+ *ret = NIL;
goto done;
}
@@ -1402,8 +1403,10 @@ static int match_traverse_continue(Process* p, DbTableHash* tb,
Sint (*next_slot_function)(DbTableHash* tb, Uint ix, erts_smp_rwmtx_t** lck_ptr)
= (lock_for_write ? next_slot_w : next_slot);
- if (got < 0)
+ if (got < 0) {
+ *ret = NIL;
return DB_ERROR_BADPARAM;
+ }
if (slot_ix < 0 /* EOT */
|| (chunk_size && got >= chunk_size))
@@ -1416,6 +1419,7 @@ static int match_traverse_continue(Process* p, DbTableHash* tb,
lck = lock_hash_function(tb, slot_ix);
if (slot_ix >= NACTIVE(tb)) { /* Is this possible? */
unlock_hash_function(lck);
+ *ret = NIL;
ret_value = DB_ERROR_BADPARAM;
goto done;
}
@@ -1806,20 +1810,20 @@ static int db_select_continue_hash(Process* p, DbTable* tbl, Eterm continuation,
tptr = tuple_val(continuation);
if (arityval(*tptr) != 6)
- return DB_ERROR_BADPARAM;
+ goto badparam;
if (!is_small(tptr[2]) || !is_small(tptr[3]) ||
!(is_list(tptr[5]) || tptr[5] == NIL) || !is_small(tptr[6]))
- return DB_ERROR_BADPARAM;
+ goto badparam;
if ((chunk_size = signed_val(tptr[3])) < 0)
- return DB_ERROR_BADPARAM;
+ goto badparam;
mp = erts_db_get_match_prog_binary(tptr[4]);
if (mp == NULL)
- return DB_ERROR_BADPARAM;
+ goto badparam;
if ((got = signed_val(tptr[6])) < 0)
- return DB_ERROR_BADPARAM;
+ goto badparam;
tid = tptr[1];
slot_ix = signed_val(tptr[2]);
@@ -1841,6 +1845,10 @@ static int db_select_continue_hash(Process* p, DbTable* tbl, Eterm continuation,
mtraversal_select_chunk_continue_on_loop_ended,
mtraversal_select_chunk_on_trap, /* Reuse callback */
&sc_context, ret);
+
+badparam:
+ *ret = NIL;
+ return DB_ERROR_BADPARAM;
}
#undef MAX_SELECT_CHUNK_ITERATIONS
@@ -1933,6 +1941,7 @@ static int db_select_count_continue_hash(Process* p, DbTable* tbl, Eterm continu
*ret = NIL;
if (unpack_simple_mtraversal_continuation(continuation, &tptr, &tid, &slot_ix, &mp, &got)) {
+ *ret = NIL;
return DB_ERROR_BADPARAM;
}
@@ -2074,6 +2083,7 @@ static int db_select_delete_continue_hash(Process* p, DbTable* tbl, Eterm contin
Sint chunk_size = 0;
if (unpack_simple_mtraversal_continuation(continuation, &tptr, &tid, &slot_ix, &mp, &got)) {
+ *ret = NIL;
return DB_ERROR_BADPARAM;
}
@@ -2217,6 +2227,7 @@ static int db_select_replace_continue_hash(Process* p, DbTable* tbl, Eterm conti
*ret = NIL;
if (unpack_simple_mtraversal_continuation(continuation, &tptr, &tid, &slot_ix, &mp, &got)) {
+ *ret = NIL;
return DB_ERROR_BADPARAM;
}