# 2008 June 18 # # 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 tests of the memory allocation subsystem. # # $Id: memsubsys2.test,v 1.1 2008/07/10 18:13:43 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl sqlite3_reset_auto_extension # This procedure constructs a new database in test.db. It fills # this database with many small records (enough to force multiple # rebalance operations in the btree-layer and to require a large # page cache), verifies correct results, then returns. # proc build_test_db {testname pragmas} { catch {db close} file delete -force test.db test.db-journal sqlite3 db test.db db eval $pragmas db eval { CREATE TABLE t1(x, y); CREATE TABLE t2(a, b); CREATE INDEX i1 ON t1(x,y); INSERT INTO t1 VALUES(1, 100); INSERT INTO t1 VALUES(2, 200); } for {set i 2} {$i<5000} {incr i $i} { db eval {INSERT INTO t2 SELECT * FROM t1} db eval {INSERT INTO t1 SELECT a+$i, a+b*100 FROM t2} db eval {DELETE FROM t2} } do_test $testname.1 { db eval {SELECT count(*) FROM t1} } 8192 integrity_check $testname.2 } # Test 1: Verify that calling sqlite3_malloc(0) returns a NULL # pointer. # set highwater [sqlite3_memory_highwater 0] do_test memsubsys2-1.1 { sqlite3_malloc 0 } {0} do_test memsubsys2-1.2 { sqlite3_memory_highwater 0 } $highwater # Test 2: Verify that the highwater mark increases after a large # allocation. # sqlite3_memory_highwater 1 set highwater [sqlite3_memory_highwater 0] do_test memsubsys2-2.1 { sqlite3_free [set x [sqlite3_malloc 100000]] expr {$x!="0"} } {1} do_test memsubsys2-2.2 { expr {[sqlite3_memory_highwater 0]>=[sqlite3_memory_used]+$highwater} } {1} # Test 3: Verify that turning of memstatus disables the statistics # tracking. # db close sqlite3_shutdown sqlite3_config_memstatus 0 sqlite3_initialize set highwater [sqlite3_memory_highwater 0] do_test memsubsys2-3.1 { set highwater } {0} do_test memsubsys2-3.2 { sqlite3_malloc 0 } {0} do_test memsubsys2-3.3 { sqlite3_memory_highwater 0 } {0} do_test memsubsys2-3.4 { sqlite3_memory_used } {0} do_test memsubsys2-3.5 { set ::allocation [sqlite3_malloc 100000] expr {$::allocation!="0"} } {1} do_test memsubsys2-3.6 { sqlite3_memory_highwater 0 } {0} do_test memsubsys2-3.7 { sqlite3_memory_used } {0} do_test memsubsys2-3.8 { sqlite3_free $::allocation } {} do_test memsubsys2-3.9 { sqlite3_free 0 } {} # Test 4: Verify that turning on memstatus reenables the statistics # tracking. # sqlite3_shutdown sqlite3_config_memstatus 1 sqlite3_initialize set highwater [sqlite3_memory_highwater 0] do_test memsubsys2-4.1 { set highwater } {0} do_test memsubsys2-4.2 { sqlite3_malloc 0 } {0} do_test memsubsys2-4.3 { sqlite3_memory_highwater 0 } {0} do_test memsubsys2-4.4 { sqlite3_memory_used } {0} do_test memsubsys2-4.5 { set ::allocation [sqlite3_malloc 100000] expr {$::allocation!="0"} } {1} do_test memsubsys2-4.6 { expr {[sqlite3_memory_highwater 0]>=100000} } {1} do_test memsubsys2-4.7 { expr {[sqlite3_memory_used]>=100000} } {1} do_test memsubsys2-4.8 { sqlite3_free $::allocation } {} do_test memsubsys2-4.9 { sqlite3_free 0 } {} do_test memsubsys2-4.10 { expr {[sqlite3_memory_highwater 0]>=100000} } {1} do_test memsubsys2-4.11 { sqlite3_memory_used } {0} autoinstall_test_functions finish_test