xref: /sqlite-3.40.0/test/fuzz_malloc.test (revision 43b78826) 
1#
2# 2007 May 10
3#
4# The author disclaims copyright to this source code.  In place of
5# a legal notice, here is a blessing:
6#
7#    May you do good and not evil.
8#    May you find forgiveness for yourself and forgive others.
9#    May you share freely, never taking more than you give.
10#
11#***********************************************************************
12#
13# This file tests malloc failures in concert with fuzzy SQL generation.
14#
15# $Id: fuzz_malloc.test,v 1.4 2007/06/15 17:03:15 drh Exp $
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20# Only run these tests if memory debugging is turned on.
21#
22if {[info command sqlite_malloc_stat]==""} {
23  puts "Skipping fuzz_malloc tests: not compiled with -DSQLITE_MEMDEBUG=1"
24  finish_test
25  return
26}
27
28source $testdir/fuzz_common.tcl
29source $testdir/malloc_common.tcl
30
31set ::REPEATS 40
32
33#
34# Usage: do_fuzzy_malloc_test <testname> ?<options>?
35#
36#     -template
37#     -sqlprep
38#     -repeats
39#
40proc do_fuzzy_malloc_test {testname args} {
41  set ::fuzzyopts(-repeats) $::REPEATS
42  set ::fuzzyopts(-sqlprep) {}
43  array set ::fuzzyopts $args
44
45  sqlite_malloc_fail 0
46  db close
47  file delete test.db test.db-journal
48  sqlite3 db test.db
49  set ::prep $::fuzzyopts(-sqlprep)
50  execsql $::prep
51  set jj 0
52  for {set ii 0} {$ii < $::fuzzyopts(-repeats)} {incr ii} {
53    expr srand($jj)
54    incr jj
55    set ::sql [subst $::fuzzyopts(-template)]
56    foreach {rc res} [catchsql "$::sql"] {}
57    if {$rc==0} {
58      do_malloc_test $testname-$ii -sqlbody $::sql -sqlprep $::prep
59    } else {
60      incr ii -1
61    }
62  }
63}
64
65#----------------------------------------------------------------
66# Test malloc failure during parsing (and execution) of a fuzzily
67# generated expressions.
68#
69do_fuzzy_malloc_test fuzzy_malloc-1 -template {Select [Expr]}
70do_fuzzy_malloc_test fuzzy_malloc-2 -template {[Select]}
71
72set ::SQLPREP {
73  BEGIN;
74    CREATE TABLE abc(a, b, c);
75    CREATE TABLE def(a, b, c);
76    CREATE TABLE ghi(a, b, c);
77    INSERT INTO abc VALUES(1.5, 3, 'a short string');
78    INSERT INTO def VALUES(NULL, X'ABCDEF',
79        'a longer string. Long enough that it doesn''t fit in Mem.zShort');
80    INSERT INTO ghi VALUES(zeroblob(1000), 'hello world', -1257900987654321);
81  COMMIT;
82}
83set ::TableList  [list abc def ghi]
84set ::ColumnList [list a b c]
85
86do_fuzzy_malloc_test fuzzy_malloc-3 \
87  -template {[Select]}              \
88  -sqlprep $::SQLPREP
89
90sqlite_malloc_fail 0
91finish_test
92