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Diffstat (limited to 'test/memsubsys2.test')
| -rw-r--r-- | test/memsubsys2.test | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/test/memsubsys2.test b/test/memsubsys2.test new file mode 100644 index 0000000..a40f4e4 --- /dev/null +++ b/test/memsubsys2.test @@ -0,0 +1,173 @@ +# 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 1.2 2008/08/12 15:21:12 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} + forcedelete 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 +} + +# Reset all of the highwater marks. +# +proc reset_highwater_marks {} { + sqlite3_status SQLITE_STATUS_MEMORY_USED 1 + sqlite3_status SQLITE_STATUS_MALLOC_SIZE 1 + sqlite3_status SQLITE_STATUS_PAGECACHE_USED 1 + sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 1 + sqlite3_status SQLITE_STATUS_PAGECACHE_SIZE 1 + sqlite3_status SQLITE_STATUS_SCRATCH_USED 1 + sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 1 + sqlite3_status SQLITE_STATUS_SCRATCH_SIZE 1 + sqlite3_status SQLITE_STATUS_PARSER_STACK 1 +} + +# 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]+$highwater} +} {1} + +# Test 3: Verify that turning of memstatus disables the statistics +# tracking. +# +db close +sqlite3_shutdown +sqlite3_config_memstatus 0 +sqlite3_initialize +reset_highwater_marks +set highwater [sqlite3_memory_highwater 0] +do_test memsubsys2-3.1 { + set highwater +} {0} +do_test memsubsys2-3.2 { + sqlite3_malloc 0 +} {0} +do_test memsubsys2-3.3 { + sqlite3_memory_highwater 0 +} {0} +do_test memsubsys2-3.4 { + sqlite3_memory_used +} {0} +do_test memsubsys2-3.5 { + set ::allocation [sqlite3_malloc 100000] + expr {$::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 $::allocation +} {} +do_test memsubsys2-3.9 { + sqlite3_free 0 +} {} + + +# Test 4: Verify that turning on memstatus reenables the statistics +# tracking. +# +sqlite3_shutdown +sqlite3_config_memstatus 1 +sqlite3_initialize +reset_highwater_marks +set highwater [sqlite3_memory_highwater 0] +do_test memsubsys2-4.1 { + set highwater +} {0} +do_test memsubsys2-4.2 { + sqlite3_malloc 0 +} {0} +do_test memsubsys2-4.3 { + sqlite3_memory_highwater 0 +} {0} +do_test memsubsys2-4.4 { + sqlite3_memory_used +} {0} +do_test memsubsys2-4.5 { + set ::allocation [sqlite3_malloc 100000] + expr {$::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 |