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Added/Updated tests\bugs\gh_8077_test.py: Added threshold in order to prevent infinite recursion in case of regression. See notes in the code, variable 'STOP_RECURSIVE_ES_AFTER_ITER'.

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pavel-zotov 2024-06-09 14:36:52 +03:00
parent a68cac9c9d
commit 35c594a5f9
1 changed files with 52 additions and 11 deletions
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63
tests/bugs/gh_8077_test.py
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@ -14,6 +14,12 @@ NOTES:
[27.05.2024] pzotov
Time of ISQL execution is limited by MAX_WAIT_FOR_ISQL_TERMINATE seconds. Currently it is ~6s for SS and ~18s for CS.
[08.06.2024] pzotov
Added threshold in order to prevent infinite recursion in case of regression.
Otherwise this test can cause collapse of test machine because of infinite launch of firebird processes (in case of Classic).
See notes in the code below, variable 'STOP_RECURSIVE_ES_AFTER_ITER'.
Checked on snapshot 5.x that was not yet fixed.
Checked on 6.0.0.362, 5.0.1.1408, 4.0.5.3103 (all SS/CS).
"""
@ -28,9 +34,10 @@ import locale
import firebird.driver
from firebird.qa import *
db = db_factory()
db = db_factory(do_not_drop = True)
#db = db_factory()
substitutions = [
('^((?!(E|e)rror|statement|recursion|source|rdb_trg|trigger|ext_pool_active|isql_outcome).)*$', '')
('^((?!(E|e)rror|exception|statement|recursion|source|rdb_trg|trigger|ext_pool_active|isql_outcome).)*$', '')
,('Execute statement error.*', 'Execute statement error')
,('Firebird::.*', 'Firebird::')
,('line(:)?\\s+\\d+.*', '')
@ -44,6 +51,23 @@ tmp_log = temp_file('tmp_8077.log')
MAX_WAIT_FOR_ISQL_BEGIN_WORK=0.5
MAX_WAIT_FOR_ISQL_TERMINATE=30
# ### NOTE ###
# We have to define generator and increment it on each DB-level trigger invocation in order to prevent infinite loop
# if its value will be greater than some threshold (in case if regression will occur and engine for some reason will
# not able to detect too deep recursion).
# Value of this generator will be compared with threshold ('STOP_RECURSIVE_ES_AFTER_ITER') and no further recursive
# calls will be executed if generator exceeds this threshold.
# But value of threshold STOP_RECURSIVE_ES_AFTER_ITER must NOT be too small.
# Otherwise following message will be MESSED from output:
# Error at disconnect:
# Execute statement error
# 335544830 : Too many recursion levels of EXECUTE STATEMENT
# Data source : Firebird::
# At trigger 'TRG_DETACH'
# Currently last value of this sequence (after exception raising) is 99 for both SS and CS.
#
STOP_RECURSIVE_ES_AFTER_ITER = 101
#--------------------------------------------------------------------
@pytest.mark.version('>=4.0.5')
@ -54,24 +78,42 @@ def test_1(act: Action, tmp_sql: Path, tmp_log: Path, capsys):
set bail on;
set term ^;
create or alter trigger trg_detach on disconnect as begin end
^
create or alter trigger trg_attach on connect as begin end
^
recreate table log( att bigint default current_connection, event_name varchar(6) )
create sequence g_attach
^
create sequence g_detach
^
create sequence g_diff
^
create exception exc_too_deep_recursion 'Execution terminated by @1: recursion depth exceeded the threshold @2 by @3'
^
recreate table log(id int primary key, att bigint default current_connection, event_name varchar(6) )
^
create or alter trigger trg_attach on connect as
declare v_pool_size int;
begin
in autonomous transaction do
insert into log(event_name) values ('attach');
if ( gen_id(g_attach,0) <= {STOP_RECURSIVE_ES_AFTER_ITER} ) then
in autonomous transaction do
insert into log(id, event_name) values (-gen_id(g_attach,1), 'attach');
else
exception exc_too_deep_recursion using ('trg_attach', {STOP_RECURSIVE_ES_AFTER_ITER}, gen_id(g_attach,1) - {STOP_RECURSIVE_ES_AFTER_ITER} - 1)
;
end
^
create or alter trigger trg_detach on disconnect as
begin
execute statement ('insert into log(event_name) values(?)') ('detach')
with autonomous transaction
on external 'localhost:' || rdb$get_context('SYSTEM', 'DB_NAME')
as user '{act.db.user}' password '{act.db.password}' role 'R' || replace(uuid_to_char(gen_uuid()),'-','')
;
if ( gen_id(g_detach,0) <= {STOP_RECURSIVE_ES_AFTER_ITER} ) then
execute statement ('insert into log(id, event_name) values(?, ?)') (gen_id(g_detach,1), 'detach')
with autonomous transaction
on external 'localhost:' || rdb$get_context('SYSTEM', 'DB_NAME')
as user '{act.db.user}' password '{act.db.password}' role 'R' || replace(uuid_to_char(gen_uuid()),'-','')
;
else
exception exc_too_deep_recursion using ('trg_detach', {STOP_RECURSIVE_ES_AFTER_ITER}, gen_id(g_detach,1) - {STOP_RECURSIVE_ES_AFTER_ITER} - 1)
;
end
^
set term ;^
@ -84,7 +126,6 @@ def test_1(act: Action, tmp_sql: Path, tmp_log: Path, capsys):
order by rdb$trigger_name;
rollback;
connect '{act.db.dsn}' user {act.db.user} password '{act.db.password}';
select cast(rdb$get_context('SYSTEM', 'EXT_CONN_POOL_SIZE') as int) as "ext_pool_size_1" from rdb$database;
quit;
"""
with open(tmp_sql, 'w') as f: