firebird-qa/tests/bugs/core_5936_test.py

#coding:utf-8
#
# id:           bugs.core_5936
# title:        Firebird crashes, related to Bugcheck 165 (cannot find tip page)
# decription:
#                   NB. Ticket title: "Firebird server segfaults in the end of database backup" - has nothing to the actual reason of segfault.
#                   Confirmed crash on:
#                       * 2.5.8.27089 SuperClassic
#                       * 2.5.9.27117 Classic and SuperClassic (build date: 29-sep-2018 - is earlier than fix: 08-oct-2018)
#
#                   Got in firebird.log:
#                       Access violation.
#                           The code attempted to access a virtual
#                           address without privilege to do so.
#                       Operating system call ReleaseSemaphore failed. Error code 6
#
#                   NOTE-1: custom transaction TPB required for this ticket: fdb.isc_tpb_concurrency, fdb.isc_tpb_wait
#
#                   NOTE-2: current title of ticket ("Firebird server segfaults in the end of database backup") has no relation to backup action.
#                   I left here only first two words from it :-)
#
#                   Bug was fixed by one-line change in FB source, see:
#                   https://github.com/FirebirdSQL/firebird/commit/676a52625c074ef15e197e7b7538755195a66905
#
#                   Checked on:
#                       2.5.9.27119 SS: OK, 0.858s.
#                       2.5.9.27129 CS/SC: OK, 15...19s
#                       3.0.5.33123: OK, 4.174s.
#                       3.0.2.32658: OK, 3.309s.
#                       4.0.0.1501: OK, 5.602s.
#                       4.0.0.1421: OK, 6.920s.
#
#                   15.04.2021. Adapted for run both on Windows and Linux. Checked on:
#                     Windows: 4.0.0.2416
#                     Linux:   4.0.0.2416
#
# tracker_id:   CORE-5936
# min_versions: ['2.5.9']
# versions:     2.5.9
# qmid:         None

import pytest
from firebird.qa import db_factory, python_act, Action
from firebird.driver import tpb, Isolation

# version: 2.5.9
# resources: None

substitutions_1 = []

init_script_1 = """"""

db_1 = db_factory(sql_dialect=3, init=init_script_1)

# test_script_1
#---
#
#  import os
#  import subprocess
#  import fdb
#  from fdb import services
#
#  os.environ["ISC_USER"] = user_name
#  os.environ["ISC_PASSWORD"] = user_password
#
#  GEN_ROWS=17000 # ----- minimal value needed for making FB to crash
#
#  THIS_FDB=db_conn.database_name
#  db_conn.close()
#
#
#  svc = services.connect(host = 'localhost', user = user_name, password = user_password)
#
#  # Disable Forced Writes:
#  ########################
#  svc.set_write_mode( THIS_FDB, services.WRITE_BUFFERED)
#  svc.close()
#
#  ddl_script='''
#      create table a (id int);
#      create index idx_a on a computed by (id);
#      commit;
#      set term ^;
#      create procedure p_gen_tx(n int) as
#          declare i int = 0;
#      begin
#          while (i < n) do
#              in autonomous transaction do
#                  i = i + 1;
#      end ^
#      set term ;^
#      commit;
#  '''
#
#  f_ddl_script = open( os.path.join(context['temp_directory'],'tmp_5936_ddl.sql'), 'w')
#  f_ddl_script.write( ddl_script )
#  f_ddl_script.close()
#
#  subprocess.call( [context['isql_path'], dsn, '-i', f_ddl_script.name ] )
#
#  os.remove( f_ddl_script.name )
#
#  #----------------------------------------------------
#
#  con1 = fdb.connect( dsn = dsn )
#
#  custom_tpb = fdb.TPB()
#  custom_tpb.isolation_level = fdb.isc_tpb_concurrency
#  custom_tpb.lock_resolution = fdb.isc_tpb_wait
#
#  tx1 = con1.trans( default_tpb = custom_tpb )
#  tx1.begin()
#
#  cur1 = tx1.cursor()
#  cur1.execute( "select current_transaction, rdb$get_context('SYSTEM', 'ISOLATION_LEVEL') from rdb$database" )
#  for r in cur1:
#      pass
#
#  #-------------------------------------------
#
#  con2 = fdb.connect( dsn = dsn )
#  tx2 = con2.trans( default_tpb = custom_tpb )
#  tx2.begin()
#  cur2 = tx2.cursor()
#  cur2.callproc( 'p_gen_tx', (GEN_ROWS,) )
#  tx2.commit()
#
#  tx2.begin()
#  cur2.execute( 'insert into a values(current_transaction)' )
#  tx2.commit()
#
#  tx2.begin()
#  cur2.execute( 'set statistics index idx_a' )
#  tx2.commit()
#
#  tx2.begin()
#  cur2.execute( 'select * from a where id > 0')
#  for r in cur2:
#      pass
#
#  tx2.commit()
#
#  tx2.begin()
#  cur2.callproc( 'p_gen_tx', (GEN_ROWS,) )
#  tx2.commit()
#
#  #--------------------------------------------
#
#  tx1.commit()
#  cur1.execute( 'select * from a where id > 0')
#  for r in cur1:
#      pass # ----------- WI-V2.5.8.27089 crashed here
#
#  print('Query completed.')
#  tx1.commit()
#
#  con1.close()
#  con2.close()
#  print('All fine.')
#
#
#---

act_1 = python_act('db_1', substitutions=substitutions_1)

GEN_ROWS = 17000 # ----- minimal value needed for making FB to crash

expected_stdout_1 = """
    Query completed.
    All fine.
"""

ddl_script = """
    create table a (id int);
    create index idx_a on a computed by (id);
    commit;
    set term ^;
    create procedure p_gen_tx(n int) as
        declare i int = 0;
    begin
        while (i < n) do
            in autonomous transaction do
                i = i + 1;
    end ^
    set term ;^
    commit;
"""

@pytest.mark.version('>=2.5.9')
def test_1(act_1: Action):
    act_1.db.set_async_write()
    act_1.isql(switches=[], input=ddl_script)
    custom_tpb = tpb(isolation=Isolation.CONCURRENCY)
    #
    with act_1.db.connect() as con1:
        tx1 = con1.transaction_manager(custom_tpb)
        tx1.begin()
        cur1 = tx1.cursor()
        cur1.execute( "select current_transaction, rdb$get_context('SYSTEM', 'ISOLATION_LEVEL') from rdb$database" )
        cur1.fetchall()
        with act_1.db.connect() as con2:
            tx2 = con2.transaction_manager(custom_tpb)
            tx2.begin()
            cur2 = tx2.cursor()
            cur2.callproc('p_gen_tx', [GEN_ROWS])
            tx2.commit()
            #
            tx2.begin()
            cur2.execute('insert into a values (current_transaction)')
            tx2.commit()
            #
            tx2.begin()
            cur2.execute('set statistics index idx_a')
            tx2.commit()
            #
            tx2.begin()
            cur2.execute('select * from a where id > 0')
            cur2.fetchall()
            tx2.commit()
            #
            tx2.begin()
            cur2.callproc('p_gen_tx', [GEN_ROWS])
            tx2.commit()
            # ---
            tx1.commit()
            cur1.execute('select * from a where id > 0')
            cur1.fetchall() # WI-V2.5.8.27089 crashed here
            tx1.commit()