--source include/have_debug.inc
--source include/have_debug_sync.inc


--echo #
--echo # Bug #91959 UBSAN: signed integer overflow in lock_update_trx_age
--echo #

  CREATE TABLE t1 (
    id INT PRIMARY KEY
  ) Engine=InnoDB;


  # Save the original settings, to be restored at the end of test
    SET @innodb_lock_wait_timeout_saved = @@global.innodb_lock_wait_timeout;

  # Make sure that transactions will not finish prematurely
    SET @@global.innodb_lock_wait_timeout = 100000;


  --source suite/innodb/include/force_cats.inc


  # We will need many connections, to create a graph,
  # in which there are N layers, and on each layer there are
  # two transactions

  --let $NUMBER_OF_LAYERS = 33
  --let $ONE = 1
  --expr $NUMBER_OF_CONNECTIONS = $NUMBER_OF_LAYERS << $ONE

  # transactions at layer $layer will hold a granted S locks
  # on row number $layer, and will wait for an exclusive lock
  # on $layer + 1

  --let $layer = 0
  while($layer < $NUMBER_OF_LAYERS)
  {
    --eval INSERT INTO t1 (id) VALUES ($layer)
    --inc $layer
  }


  --let $connection_number = 0
  while($connection_number < $NUMBER_OF_CONNECTIONS)
  {
    --let $connection_name = connection$connection_number
    --expr $layer = $connection_number >> $ONE
    --echo # establishing connection $connection_name on layer $layer and acquire S lock on $layer
    --connect ($connection_name, localhost, root,,)
    BEGIN;
    --eval SELECT * FROM t1 WHERE id = $layer FOR SHARE
    --inc $connection_number
  }

  --let $connection_number = 0
  while($connection_number < $NUMBER_OF_CONNECTIONS)
  {
    --expr $layer = $connection_number >> $ONE
    --expr $next_layer = $layer + $ONE
    --let $connection_name = connection$connection_number
    if($next_layer < $NUMBER_OF_LAYERS)
    {
      --echo # connection_name on layer $layer tries to acquire X lock on $next_layer
      --connection $connection_name
      --eval SET DEBUG_SYNC = 'lock_wait_will_wait SIGNAL $connection_name'
      --send_eval SELECT * FROM t1 WHERE id = $next_layer FOR UPDATE;ROLLBACK
      --connection default
      --eval SET DEBUG_SYNC = 'now WAIT_FOR $connection_name'
    }
    --inc $connection_number
  }

  # Disconnect all clients
  --expr $connection_number = $NUMBER_OF_CONNECTIONS - $ONE
  while($connection_number >= 0)
  {
    --expr $layer = $connection_number >> $ONE
    --expr $next_layer = $layer + $ONE
    --let $connection_name = connection$connection_number
    --connection $connection_name
    --echo # cleaning up connection $connection_name
    if($next_layer < $NUMBER_OF_LAYERS)
    {
      --reap
    }
    ROLLBACK;
    --disconnect $connection_name
    --dec $connection_number
  }


  --source suite/innodb/include/discourage_cats.inc

  --connection default
  # Clean up tables

  DROP TABLE t1;

  # Restore saved state

  SET @@global.innodb_lock_wait_timeout = @innodb_lock_wait_timeout_saved;

--echo #
--echo # End of Bug #91959
--echo #