[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/malloc5.test

-# 2005 November 30
-#
-# The author disclaims copyright to this source code.  In place of
-# a legal notice, here is a blessing:
-#
-#    May you do good and not evil.
-#    May you find forgiveness for yourself and forgive others.
-#    May you share freely, never taking more than you give.
-#
-#***********************************************************************
-#
-# This file contains test cases focused on the two memory-management APIs, 
-# sqlite3_soft_heap_limit() and sqlite3_release_memory().
-#
-# Prior to version 3.6.2, calling sqlite3_release_memory() or exceeding
-# the configured soft heap limit could cause sqlite to upgrade database 
-# locks and flush dirty pages to the file system. As of 3.6.2, this is
-# no longer the case. In version 3.6.2, sqlite3_release_memory() only
-# reclaims clean pages. This test file has been updated accordingly.
-#
-# $Id: malloc5.test,v 1.22 2009/04/11 19:09:54 drh Exp $
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-source $testdir/malloc_common.tcl
-db close
-
-# Only run these tests if memory debugging is turned on.
-#
-if {!$MEMDEBUG} {
-   puts "Skipping malloc5 tests: not compiled with -DSQLITE_MEMDEBUG..."
-   finish_test
-   return
-}
-
-# Skip these tests if OMIT_MEMORY_MANAGEMENT was defined at compile time.
-ifcapable !memorymanage {
-   finish_test
-   return
-}
-
-sqlite3_soft_heap_limit 0
-sqlite3 db test.db
-
-do_test malloc5-1.1 {
-  # Simplest possible test. Call sqlite3_release_memory when there is exactly
-  # one unused page in a single pager cache. The page cannot be freed, as
-  # it is dirty. So sqlite3_release_memory() returns 0.
-  #
-  execsql {
-    PRAGMA auto_vacuum=OFF;
-    BEGIN;
-    CREATE TABLE abc(a, b, c);
-  }
-  sqlite3_release_memory
-} {0}
-
-do_test malloc5-1.2 {
-  # Test that the transaction started in the above test is still active.
-  # The lock on the database file should not have been upgraded (this was
-  # not the case before version 3.6.2).
-  #
-  sqlite3 db2 test.db
-  execsql { SELECT * FROM sqlite_master } db2
-} {}
-do_test malloc5-1.3 {
-  # Call [sqlite3_release_memory] when there is exactly one unused page 
-  # in the cache belonging to db2.
-  #
-  set ::pgalloc [sqlite3_release_memory]
-  expr $::pgalloc > 0
-} {1}
-
-do_test malloc5-1.4 {
-  # Commit the transaction and open a new one. Read 1 page into the cache.
-  # Because the page is not dirty, it is eligible for collection even
-  # before the transaction is concluded.
-  #
-  execsql {
-    COMMIT;
-    BEGIN;
-    SELECT * FROM abc;
-  }
-  sqlite3_release_memory
-} $::pgalloc
-
-do_test malloc5-1.5 {
-  # Conclude the transaction opened in the previous [do_test] block. This
-  # causes another page (page 1) to become eligible for recycling.
-  #
-  execsql { COMMIT }
-  sqlite3_release_memory
-} $::pgalloc
-
-do_test malloc5-1.6 {
-  # Manipulate the cache so that it contains two unused pages. One requires 
-  # a journal-sync to free, the other does not.
-  db2 close
-  execsql {
-    BEGIN;
-    SELECT * FROM abc;
-    CREATE TABLE def(d, e, f);
-  }
-  sqlite3_release_memory 500
-} $::pgalloc
-
-do_test malloc5-1.7 {
-  # Database should not be locked this time. 
-  sqlite3 db2 test.db
-  catchsql { SELECT * FROM abc } db2
-} {0 {}}
-do_test malloc5-1.8 {
-  # Try to release another block of memory. This will fail as the only
-  # pages currently in the cache are dirty (page 3) or pinned (page 1).
-  db2 close
-  sqlite3_release_memory 500
-} 0
-do_test malloc5-1.8 {
-  # Database is still not locked.
-  #
-  sqlite3 db2 test.db
-  catchsql { SELECT * FROM abc } db2
-} {0 {}}
-do_test malloc5-1.9 {
-  execsql {
-    COMMIT;
-  }
-} {}
-
-do_test malloc5-2.1 {
-  # Put some data in tables abc and def. Both tables are still wholly 
-  # contained within their root pages.
-  execsql {
-    INSERT INTO abc VALUES(1, 2, 3);
-    INSERT INTO abc VALUES(4, 5, 6);
-    INSERT INTO def VALUES(7, 8, 9);
-    INSERT INTO def VALUES(10,11,12);
-  }
-} {}
-do_test malloc5-2.2 {
-  # Load the root-page for table def into the cache. Then query table abc. 
-  # Halfway through the query call sqlite3_release_memory(). The goal of this
-  # test is to make sure we don't free pages that are in use (specifically, 
-  # the root of table abc).
-  sqlite3_release_memory
-  set nRelease 0
-  execsql { 
-    BEGIN;
-    SELECT * FROM def;
-  }
-  set data [list]
-  db eval {SELECT * FROM abc} {
-    incr nRelease [sqlite3_release_memory]
-    lappend data $a $b $c
-  }
-  execsql {
-    COMMIT;
-  }
-  list $nRelease $data
-} [list $pgalloc [list 1 2 3 4 5 6]]
-
-do_test malloc5-3.1 {
-  # Simple test to show that if two pagers are opened from within this
-  # thread, memory is freed from both when sqlite3_release_memory() is
-  # called.
-  execsql {
-    BEGIN;
-    SELECT * FROM abc;
-  }
-  execsql {
-    SELECT * FROM sqlite_master;
-    BEGIN;
-    SELECT * FROM def;
-  } db2
-  sqlite3_release_memory
-} [expr $::pgalloc * 2]
-do_test malloc5-3.2 {
-  concat \
-    [execsql {SELECT * FROM abc; COMMIT}] \
-    [execsql {SELECT * FROM def; COMMIT} db2]
-} {1 2 3 4 5 6 7 8 9 10 11 12}
-
-db2 close
-puts "Highwater mark: [sqlite3_memory_highwater]"
-
-# The following two test cases each execute a transaction in which 
-# 10000 rows are inserted into table abc. The first test case is used
-# to ensure that more than 1MB of dynamic memory is used to perform
-# the transaction. 
-#
-# The second test case sets the "soft-heap-limit" to 100,000 bytes (0.1 MB)
-# and tests to see that this limit is not exceeded at any point during 
-# transaction execution.
-#
-# Before executing malloc5-4.* we save the value of the current soft heap 
-# limit in variable ::soft_limit. The original value is restored after 
-# running the tests.
-#
-set ::soft_limit [sqlite3_soft_heap_limit -1]
-execsql {PRAGMA cache_size=2000}
-do_test malloc5-4.1 {
-  execsql {BEGIN;}
-  execsql {DELETE FROM abc;}
-  for {set i 0} {$i < 10000} {incr i} {
-    execsql "INSERT INTO abc VALUES($i, $i, '[string repeat X 100]');"
-  }
-  execsql {COMMIT;}
-  db cache flush
-  sqlite3_release_memory
-  sqlite3_memory_highwater 1
-  execsql {SELECT * FROM abc}
-  set nMaxBytes [sqlite3_memory_highwater 1]
-  puts -nonewline " (Highwater mark: $nMaxBytes) "
-  expr $nMaxBytes > 1000000
-} {1}
-do_test malloc5-4.2 {
-  db cache flush
-  sqlite3_release_memory
-  sqlite3_soft_heap_limit 100000
-  sqlite3_memory_highwater 1
-  execsql {SELECT * FROM abc}
-  set nMaxBytes [sqlite3_memory_highwater 1]
-  puts -nonewline " (Highwater mark: $nMaxBytes) "
-  expr $nMaxBytes <= 110000
-} {1}
-do_test malloc5-4.3 {
-  # Check that the content of table abc is at least roughly as expected.
-  execsql {
-    SELECT count(*), sum(a), sum(b) FROM abc;
-  }
-} [list 10000 [expr int(10000.0 * 4999.5)] [expr int(10000.0 * 4999.5)]]
-
-# Restore the soft heap limit.
-sqlite3_soft_heap_limit $::soft_limit
-
-# Test that there are no problems calling sqlite3_release_memory when
-# there are open in-memory databases.
-#
-# At one point these tests would cause a seg-fault.
-#
-do_test malloc5-5.1 {
-  db close
-  sqlite3 db :memory:
-  execsql {
-    BEGIN;
-    CREATE TABLE abc(a, b, c);
-    INSERT INTO abc VALUES('abcdefghi', 1234567890, NULL);
-    INSERT INTO abc SELECT * FROM abc;
-    INSERT INTO abc SELECT * FROM abc;
-    INSERT INTO abc SELECT * FROM abc;
-    INSERT INTO abc SELECT * FROM abc;
-    INSERT INTO abc SELECT * FROM abc;
-    INSERT INTO abc SELECT * FROM abc;
-    INSERT INTO abc SELECT * FROM abc;
-  }
-  sqlite3_release_memory
-} 0
-do_test malloc5-5.2 {
-  sqlite3_soft_heap_limit 5000
-  execsql {
-    COMMIT;
-    PRAGMA temp_store = memory;
-    SELECT * FROM abc ORDER BY a;
-  }
-  expr 1
-} {1}
-sqlite3_soft_heap_limit $::soft_limit
-
-#-------------------------------------------------------------------------
-# The following test cases (malloc5-6.*) test the new global LRU list
-# used to determine the pages to recycle when sqlite3_release_memory is
-# called and there is more than one pager open.
-#
-proc nPage {db} {
-  set bt [btree_from_db $db]
-  array set stats [btree_pager_stats $bt]
-  set stats(page)
-}
-db close
-forcedelete test.db test.db-journal test2.db test2.db-journal
-
-# This block of test-cases (malloc5-6.1.*) prepares two database files
-# for the subsequent tests.
-do_test malloc5-6.1.1 {
-  sqlite3 db test.db
-  execsql {
-    PRAGMA page_size=1024;
-    PRAGMA default_cache_size=10;
-  }
-  execsql {
-    PRAGMA temp_store = memory;
-    BEGIN;
-    CREATE TABLE abc(a PRIMARY KEY, b, c);
-    INSERT INTO abc VALUES(randstr(50,50), randstr(75,75), randstr(100,100));
-    INSERT INTO abc 
-        SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
-    INSERT INTO abc 
-        SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
-    INSERT INTO abc 
-        SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
-    INSERT INTO abc 
-        SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
-    INSERT INTO abc 
-        SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
-    INSERT INTO abc 
-        SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
-    COMMIT;
-  } 
-  forcecopy test.db test2.db
-  sqlite3 db2 test2.db
-  list \
-    [expr ([file size test.db]/1024)>20] [expr ([file size test2.db]/1024)>20]
-} {1 1}
-do_test malloc5-6.1.2 {
-  list [execsql {PRAGMA cache_size}] [execsql {PRAGMA cache_size} db2]
-} {10 10}
-
-do_test malloc5-6.2.1 {
-  execsql {SELECT * FROM abc} db2
-  execsql {SELECT * FROM abc} db
-  expr [nPage db] + [nPage db2]
-} {20}
-
-do_test malloc5-6.2.2 {
-  # If we now try to reclaim some memory, it should come from the db2 cache.
-  sqlite3_release_memory 3000
-  expr [nPage db] + [nPage db2]
-} {17}
-do_test malloc5-6.2.3 {
-  # Access the db2 cache again, so that all the db2 pages have been used
-  # more recently than all the db pages. Then try to reclaim 3000 bytes.
-  # This time, 3 pages should be pulled from the db cache.
-  execsql { SELECT * FROM abc } db2
-  sqlite3_release_memory 3000
-  expr [nPage db] + [nPage db2]
-} {17}
-
-do_test malloc5-6.3.1 {
-  # Now open a transaction and update 2 pages in the db2 cache. Then
-  # do a SELECT on the db cache so that all the db pages are more recently
-  # used than the db2 pages. When we try to free memory, SQLite should
-  # free the non-dirty db2 pages, then the db pages, then finally use
-  # sync() to free up the dirty db2 pages. The only page that cannot be
-  # freed is page1 of db2. Because there is an open transaction, the
-  # btree layer holds a reference to page 1 in the db2 cache.
-  execsql {
-    BEGIN;
-    UPDATE abc SET c = randstr(100,100) 
-    WHERE rowid = 1 OR rowid = (SELECT max(rowid) FROM abc);
-  } db2
-  execsql { SELECT * FROM abc } db
-  expr [nPage db] + [nPage db2]
-} {20}
-do_test malloc5-6.3.2 {
-  # Try to release 7700 bytes. This should release all the 
-  # non-dirty pages held by db2.
-  sqlite3_release_memory [expr 7*1132]
-  list [nPage db] [nPage db2]
-} {10 3}
-do_test malloc5-6.3.3 {
-  # Try to release another 1000 bytes. This should come fromt the db
-  # cache, since all three pages held by db2 are either in-use or diry.
-  sqlite3_release_memory 1000
-  list [nPage db] [nPage db2]
-} {9 3}
-do_test malloc5-6.3.4 {
-  # Now release 9900 more (about 9 pages worth). This should expunge
-  # the rest of the db cache. But the db2 cache remains intact, because
-  # SQLite tries to avoid calling sync().
-  if {$::tcl_platform(wordSize)==8} {
-    sqlite3_release_memory 10500
-  } else {
-    sqlite3_release_memory 9900
-  }
-  list [nPage db] [nPage db2]
-} {0 3}
-do_test malloc5-6.3.5 {
-  # But if we are really insistent, SQLite will consent to call sync()
-  # if there is no other option. UPDATE: As of 3.6.2, SQLite will not
-  # call sync() in this scenario. So no further memory can be reclaimed.
-  sqlite3_release_memory 1000
-  list [nPage db] [nPage db2]
-} {0 3}
-do_test malloc5-6.3.6 {
-  # The referenced page (page 1 of the db2 cache) will not be freed no
-  # matter how much memory we ask for:
-  sqlite3_release_memory 31459
-  list [nPage db] [nPage db2]
-} {0 3}
-
-db2 close
-
-sqlite3_soft_heap_limit $::soft_limit
-finish_test
-catch {db close}