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# 2008 June 18
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file contains tests of the memory allocation subsystem.
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#
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# $Id: memsubsys2.test,v 1.2 2008/08/12 15:21:12 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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sqlite3_reset_auto_extension
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# This procedure constructs a new database in test.db. It fills
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# this database with many small records (enough to force multiple
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# rebalance operations in the btree-layer and to require a large
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# page cache), verifies correct results, then returns.
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#
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proc build_test_db {testname pragmas} {
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catch {db close}
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file delete -force test.db test.db-journal
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sqlite3 db test.db
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db eval $pragmas
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db eval {
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CREATE TABLE t1(x, y);
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CREATE TABLE t2(a, b);
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CREATE INDEX i1 ON t1(x,y);
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INSERT INTO t1 VALUES(1, 100);
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INSERT INTO t1 VALUES(2, 200);
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}
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for {set i 2} {$i<5000} {incr i $i} {
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db eval {INSERT INTO t2 SELECT * FROM t1}
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db eval {INSERT INTO t1 SELECT a+$i, a+b*100 FROM t2}
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db eval {DELETE FROM t2}
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}
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do_test $testname.1 {
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db eval {SELECT count(*) FROM t1}
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} 8192
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integrity_check $testname.2
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}
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# Reset all of the highwater marks.
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#
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proc reset_highwater_marks {} {
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sqlite3_status SQLITE_STATUS_MEMORY_USED 1
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sqlite3_status SQLITE_STATUS_MALLOC_SIZE 1
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sqlite3_status SQLITE_STATUS_PAGECACHE_USED 1
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sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 1
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sqlite3_status SQLITE_STATUS_PAGECACHE_SIZE 1
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sqlite3_status SQLITE_STATUS_SCRATCH_USED 1
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sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 1
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sqlite3_status SQLITE_STATUS_SCRATCH_SIZE 1
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sqlite3_status SQLITE_STATUS_PARSER_STACK 1
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}
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# Test 1: Verify that calling sqlite3_malloc(0) returns a NULL
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# pointer.
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#
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set highwater [sqlite3_memory_highwater 0]
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do_test memsubsys2-1.1 {
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sqlite3_malloc 0
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} {0}
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do_test memsubsys2-1.2 {
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sqlite3_memory_highwater 0
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} $highwater
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# Test 2: Verify that the highwater mark increases after a large
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# allocation.
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#
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sqlite3_memory_highwater 1
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set highwater [sqlite3_memory_highwater 0]
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do_test memsubsys2-2.1 {
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sqlite3_free [set x [sqlite3_malloc 100000]]
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expr {$x!="0"}
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} {1}
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do_test memsubsys2-2.2 {
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expr {[sqlite3_memory_highwater 0]>=[sqlite3_memory_used]+$highwater}
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} {1}
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# Test 3: Verify that turning of memstatus disables the statistics
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# tracking.
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#
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db close
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sqlite3_shutdown
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sqlite3_config_memstatus 0
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sqlite3_initialize
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reset_highwater_marks
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set highwater [sqlite3_memory_highwater 0]
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do_test memsubsys2-3.1 {
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set highwater
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} {0}
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do_test memsubsys2-3.2 {
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sqlite3_malloc 0
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} {0}
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do_test memsubsys2-3.3 {
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sqlite3_memory_highwater 0
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} {0}
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do_test memsubsys2-3.4 {
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sqlite3_memory_used
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} {0}
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do_test memsubsys2-3.5 {
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set ::allocation [sqlite3_malloc 100000]
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expr {$::allocation!="0"}
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} {1}
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do_test memsubsys2-3.6 {
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sqlite3_memory_highwater 0
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} {0}
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do_test memsubsys2-3.7 {
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sqlite3_memory_used
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} {0}
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do_test memsubsys2-3.8 {
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sqlite3_free $::allocation
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} {}
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do_test memsubsys2-3.9 {
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sqlite3_free 0
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} {}
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# Test 4: Verify that turning on memstatus reenables the statistics
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# tracking.
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#
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sqlite3_shutdown
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sqlite3_config_memstatus 1
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sqlite3_initialize
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reset_highwater_marks
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set highwater [sqlite3_memory_highwater 0]
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do_test memsubsys2-4.1 {
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set highwater
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} {0}
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do_test memsubsys2-4.2 {
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sqlite3_malloc 0
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} {0}
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do_test memsubsys2-4.3 {
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sqlite3_memory_highwater 0
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} {0}
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do_test memsubsys2-4.4 {
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sqlite3_memory_used
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} {0}
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do_test memsubsys2-4.5 {
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set ::allocation [sqlite3_malloc 100000]
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expr {$::allocation!="0"}
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} {1}
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do_test memsubsys2-4.6 {
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expr {[sqlite3_memory_highwater 0]>=100000}
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} {1}
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do_test memsubsys2-4.7 {
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expr {[sqlite3_memory_used]>=100000}
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} {1}
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do_test memsubsys2-4.8 {
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sqlite3_free $::allocation
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} {}
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do_test memsubsys2-4.9 {
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sqlite3_free 0
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} {}
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do_test memsubsys2-4.10 {
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expr {[sqlite3_memory_highwater 0]>=100000}
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} {1}
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do_test memsubsys2-4.11 {
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sqlite3_memory_used
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} {0}
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autoinstall_test_functions
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finish_test
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