Add test file for new malloc() failure handling. (CVS 2801)

FossilOrigin-Name: 0b82f9623cf25b1cb02f70628c992903a6e8ca1c
This commit is contained in:
danielk1977 2005-12-06 12:57:58 +00:00
parent 261919cc16
commit 1a485fca83
3 changed files with 596 additions and 6 deletions

View File

@ -1,5 +1,5 @@
C Some\selements\sof\sthe\snew\smalloc()\sfailure\shandling.\sNot\sall\scases\swork\sproperly\syet.\sAlso,\slibrary\sis\snot\sthreadsafe\sif\smalloc()\sfails\sright\snow.\s(CVS\s2800)
D 2005-12-06T12:52:59
C Add\stest\sfile\sfor\snew\smalloc()\sfailure\shandling.\s(CVS\s2801)
D 2005-12-06T12:57:59
F Makefile.in e3c6b3a38d734d41574c04f2fc90d18de2b87102
F Makefile.linux-gcc aee18d8a05546dcf1888bd4547e442008a49a092
F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@ -179,6 +179,7 @@ F test/lock3.test 615111293cf32aa2ed16d01c6611737651c96fb9
F test/main.test b12f01d49a5c805a33fa6c0ef168691f63056e79
F test/malloc.test a5ed721cf7d1b12602ede4f98c11b65ab1582cc0
F test/malloc2.test e6e321db96d6c94cb18bf82ad7215070c41e624e
F test/malloc3.test 4e669aa90dcd410cdef0ebd92d3b69b93578cc8f
F test/manydb.test d81debbf5871242e3b5df1d3bb5e14c50431b6f8
F test/memdb.test 1860e060be810bf0775bc57408a5b7c4954bcaea
F test/memleak.test df2b2b96e77f8ba159a332299535b1e5f18e49ac
@ -324,7 +325,7 @@ F www/tclsqlite.tcl ddcf912ea48695603c8ed7efb29f0812ef8d1b49
F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
P 41a7aeeeb427d59e3d7cc71c94a8c5be832bd0fa
R ce02aa0c65608cead49ff0e73829ca6c
P e1606658f1b4530e3001db4779b5669c8d13c853
R c0b4731d8bcaf131c3e1be6b27745b27
U danielk1977
Z 3b6d26a30c726439418b3a6a9650fe3d
Z 122b6303e6a13505a3a7b36ef59dc965

View File

@ -1 +1 @@
e1606658f1b4530e3001db4779b5669c8d13c853
0b82f9623cf25b1cb02f70628c992903a6e8ca1c

589
test/malloc3.test Normal file
View File

@ -0,0 +1,589 @@
# 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.
#
#***********************************************************************
#
# $Id: malloc3.test,v 1.1 2005/12/06 12:57:59 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Only run these tests if memory debugging is turned on.
if {[info command sqlite_malloc_stat]==""} {
puts "Skipping malloc tests: not compiled with -DSQLITE_MEMDEBUG..."
finish_test
return
}
#--------------------------------------------------------------------------
# NOTES ON RECOVERING FROM A MALLOC FAILURE
#
# The tests in this file test the behaviours described in the following
# paragraphs. These tests test the behaviour of the system when malloc() fails
# inside of a call to _prepare(), _step(), _finalize() or _reset(). The
# handling of malloc() failures within ancillary procedures is tested
# elsewhere.
#
# Overview:
#
# Executing a statement is done in three stages (prepare, step and finalize). A
# malloc() failure may occur within any stage. If a memory allocation fails
# during statement preparation, no statement handle is returned. From the users
# point of view the system state is as if _prepare() had never been called.
#
# If the memory allocation fails during the _step() or _finalize() calls, then
# the database may be left in one of two states (after finalize() has been
# called):
#
# * As if the neither _step() nor _finalize() had ever been called on
# the statement handle (i.e. any changes made by the statement are
# rolled back).
# * The current transaction may be rolled back. In this case a hot-journal
# may or may not actually be present in the filesystem.
#
# The caller can tell the difference between these two scenarios by invoking
# _get_autocommit().
#
#
# Handling of sqlite3_reset():
#
# If a malloc() fails while executing an sqlite3_reset() call, this is handled
# in the same way as a failure within _finalize(). The statement handle
# is not deleted and must be passed to _finalize() for resource deallocation.
# Attempting to _step() or _reset() the statement after a failed _reset() will
# always return SQLITE_NOMEM.
#
#
# Other active SQL statements:
#
# The effect of a malloc failure on concurrently executing SQL statements,
# particularly when the statement is executing with READ_UNCOMMITTED set and
# the malloc() failure mandates statement rollback only. Currently, if
# transaction rollback is required, all other vdbe's are aborted.
#
# Non-transient mallocs in btree.c:
# * The Btree structure itself
# * Each BtCursor structure
#
# Mallocs in pager.c:
# readMasterJournal() - Space to read the master journal name
# pager_delmaster() - Space for the entire master journal file
#
# sqlite3pager_open() - The pager structure itself
# sqlite3_pagerget() - Space for a new page
# pager_open_journal() - Pager.aInJournal[] bitmap
# sqlite3pager_write() - For in-memory databases only: history page and
# statement history page.
# pager_stmt_begin() - Pager.aInStmt[] bitmap
#
# None of the above are a huge problem. The most troublesome failures are the
# transient malloc() calls in btree.c, which can occur during the tree-balance
# operation. This means the tree being balanced will be internally inconsistent
# after the malloc() fails. To avoid the corrupt tree being read by a
# READ_UNCOMMITTED query, we have to make sure the transaction or statement
# rollback occurs before sqlite3_step() returns, not during a subsequent
# sqlite3_finalize().
#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
# NOTES ON TEST IMPLEMENTATION
#
# The tests in this file are implemented differently from those in other
# files. Instead, tests are specified using three primitives: SQL, PREP and
# TEST. Each primitive has a single argument. Primitives are processed in
# the order they are specified in the file.
#
# A TEST primitive specifies a TCL script as it's argument. When a TEST
# directive is encountered the Tcl script is evaluated. Usually, this Tcl
# script contains one or more calls to [do_test].
#
# A PREP primitive specifies an SQL script as it's argument. When a PREP
# directive is encountered the SQL is evaluated using database connection
# [db].
#
# The SQL primitives are where the action happens. An SQL primitive must
# contain a single, valid SQL statement as it's argument. When an SQL
# primitive is encountered, it is evaluated one or more times to test the
# behaviour of the system when malloc() fails during preparation or
# execution of said statement. The Nth time the statement is executed,
# the Nth malloc is said to fail. The statement is executed until it
# succeeds, i.e. (M+1) times, where M is the number of mallocs() required
# to prepare and execute the statement.
#
# Each time an SQL statement fails, the driver program (see proc [run_test]
# below) figures out if a transaction has been automatically rolled back.
# If not, it executes any TEST block immediately proceeding the SQL
# statement, then reexecutes the SQL statement with the next value of N.
#
# If a transaction has been automatically rolled back, then the driver
# program executes all the SQL specified as part of SQL or PREP primitives
# between the current SQL statement and the most recent "BEGIN". Any
# TEST block immediately proceeding the SQL statement is evaluated, and
# then the SQL statement reexecuted with the incremented N value.
#
# That make any sense? If not, read the code in [run_test] and it might.
#
# Extra restriction imposed by the implementation:
#
# * If a PREP block starts a transaction, it must finish it.
# * A PREP block may not close a transaction it did not start.
#
#--------------------------------------------------------------------------
# These procs are used to build up a "program" in global variable
# ::run_test_script. At the end of this file, the proc [run_test] is used
# to execute the program (and all test cases contained therein).
#
proc TEST {id t} {lappend ::run_test_script -test [list $id $t]}
proc PREP {p} {lappend ::run_test_script -prep [string trim $p]}
# SQL --
#
# SQL ?-norollback? <sql-text>
#
# Add an 'SQL' primitive to the program (see notes above). If the -norollback
# switch is present, then the statement is not allowed to automatically roll
# back any active transaction if malloc() fails. It must rollback the statement
# transaction only.
#
proc SQL {a1 {a2 ""}} {
# An SQL primitive parameter is a list of two elements, a boolean value
# indicating if the statement may cause transaction rollback when malloc()
# fails, and the sql statement itself.
if {$a2 == ""} {
lappend ::run_test_script -sql [list true [string trim $a1]]
} else {
lappend ::run_test_script -sql [list false [string trim $a2]]
}
}
# TEST_AUTOCOMMIT --
#
# A shorthand test to see if a transaction is active or not. The first
# argument - $id - is the integer number of the test case. The second
# argument is either 1 or 0, the expected value of the auto-commit flag.
#
proc TEST_AUTOCOMMIT {id a} {
TEST $id "do_test \$testid { sqlite3_get_autocommit $::DB } {$a}"
}
#--------------------------------------------------------------------------
# Start of test program declaration
#
# Warm body test. A malloc() fails in the middle of a CREATE TABLE statement
# in a single-statement transaction on an empty database. Not too much can go
# wrong here.
#
TEST 1 {
do_test $testid {
execsql {SELECT tbl_name FROM sqlite_master;}
} {}
}
SQL {
CREATE TABLE abc(a, b, c);
}
TEST 2 {
do_test $testid.1 {
execsql {SELECT tbl_name FROM sqlite_master;}
} {abc}
}
# Insert a couple of rows into the table. each insert is in it's own
# transaction. test that the table is unpopulated before running the inserts
# (and hence after each failure of the first insert), and that it has been
# populated correctly after the final insert succeeds.
#
TEST 3 {
do_test $testid.2 {
execsql {SELECT * FROM abc}
} {}
}
SQL {INSERT INTO abc VALUES(1, 2, 3);}
SQL {INSERT INTO abc VALUES(4, 5, 6);}
SQL {INSERT INTO abc VALUES(7, 8, 9);}
TEST 4 {
do_test $testid {
execsql {SELECT * FROM abc}
} {1 2 3 4 5 6 7 8 9}
}
# Test a CREATE INDEX statement. Because the table 'abc' is so small, the index
# will all fit on a single page, so this doesn't test too much that the CREATE
# TABLE statement didn't test. A few of the transient malloc()s in btree.c
# perhaps.
#
SQL {CREATE INDEX abc_i ON abc(a, b, c);}
TEST 4 {
do_test $testid {
execsql {
SELECT * FROM abc ORDER BY a DESC;
}
} {7 8 9 4 5 6 1 2 3}
}
# Test a DELETE statement. Also create a trigger and a view, just to make sure
# these statements don't have any obvious malloc() related bugs in them. Note
# that the test above will be executed each time the DELETE fails, so we're
# also testing rollback of a DELETE from a table with an index on it.
#
SQL {DELETE FROM abc WHERE a > 2;}
SQL {CREATE TRIGGER abc_t AFTER INSERT ON abc BEGIN SELECT 'trigger!'; END;}
SQL {CREATE VIEW abc_v AS SELECT * FROM abc;}
TEST 5 {
do_test $testid {
execsql {
SELECT name, tbl_name FROM sqlite_master ORDER BY name;
SELECT * FROM abc;
}
} {abc abc abc_i abc abc_t abc abc_v abc_v 1 2 3}
}
set sql {
BEGIN;DELETE FROM abc;
}
for {set i 1} {$i < 100} {incr i} {
set a $i
set b "String value $i"
set c [string repeat X $i]
append sql "INSERT INTO abc VALUES ($a, '$b', '$c');"
}
append sql {COMMIT;}
PREP $sql
SQL {
DELETE FROM abc WHERE oid IN (SELECT oid FROM abc ORDER BY random() LIMIT 5);
}
TEST 6 {
do_test $testid.1 {
execsql {SELECT count(*) FROM abc}
} {94}
do_test $testid.2 {
execsql {
SELECT min(
(oid == a) AND 'String value ' || a == b AND a == length(c)
) FROM abc;
}
} {1}
}
SQL {
DELETE FROM abc WHERE oid IN (SELECT oid FROM abc ORDER BY random() LIMIT 5);
}
TEST 7 {
do_test $testid {
execsql {SELECT count(*) FROM abc}
} {89}
do_test $testid {
execsql {
SELECT min(
(oid == a) AND 'String value ' || a == b AND a == length(c)
) FROM abc;
}
} {1}
}
SQL {
DELETE FROM abc WHERE oid IN (SELECT oid FROM abc ORDER BY random() LIMIT 5);
}
TEST 9 {
do_test $testid {
execsql {SELECT count(*) FROM abc}
} {84}
do_test $testid {
execsql {
SELECT min(
(oid == a) AND 'String value ' || a == b AND a == length(c)
) FROM abc;
}
} {1}
}
set padding [string repeat X 500]
PREP [subst {
DROP TABLE abc;
CREATE TABLE abc(a PRIMARY KEY, padding, b, c);
INSERT INTO abc VALUES(0, '$padding', 2, 2);
INSERT INTO abc VALUES(3, '$padding', 5, 5);
INSERT INTO abc VALUES(6, '$padding', 8, 8);
}]
TEST 10 {
do_test $testid {
execsql {SELECT a, b, c FROM abc}
} {0 2 2 3 5 5 6 8 8}
}
SQL {BEGIN;}
SQL {INSERT INTO abc VALUES(9, 'XXXXX', 11, 12);}
TEST_AUTOCOMMIT 11 0
SQL -norollback {UPDATE abc SET a = a + 1, c = c + 1;}
TEST_AUTOCOMMIT 12 0
SQL {DELETE FROM abc WHERE a = 10;}
TEST_AUTOCOMMIT 13 0
SQL {COMMIT;}
TEST 14 {
do_test $testid.1 {
sqlite3_get_autocommit $::DB
} {1}
do_test $testid.2 {
execsql {SELECT a, b, c FROM abc}
} {1 2 3 4 5 6 7 8 9}
}
PREP [subst {
DROP TABLE abc;
CREATE TABLE abc(a, padding, b, c);
INSERT INTO abc VALUES(1, '$padding', 2, 3);
INSERT INTO abc VALUES(4, '$padding', 5, 6);
INSERT INTO abc VALUES(7, '$padding', 8, 9);
CREATE INDEX abc_i ON abc(a, padding, b, c);
}]
TEST 15 {
db eval {PRAGMA cache_size = 10}
}
SQL {BEGIN;}
SQL -norllbck {INSERT INTO abc (oid, a, padding, b, c) SELECT NULL, * FROM abc}
TEST 16 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 2 4 2 7 2}
}
SQL -norllbck {INSERT INTO abc (oid, a, padding, b, c) SELECT NULL, * FROM abc}
TEST 17 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 4 4 4 7 4}
}
SQL -norllbck {INSERT INTO abc (oid, a, padding, b, c) SELECT NULL, * FROM abc}
TEST 18 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 8 4 8 7 8}
}
SQL -norllbck {INSERT INTO abc (oid, a, padding, b, c) SELECT NULL, * FROM abc}
TEST 19 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 16 4 16 7 16}
}
SQL {COMMIT;}
TEST 21 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 16 4 16 7 16}
}
SQL {BEGIN;}
SQL {DELETE FROM abc WHERE oid %2}
TEST 22 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 8 4 8 7 8}
}
SQL {DELETE FROM abc}
TEST 23 {
do_test $testid {
execsql {SELECT * FROM abc}
} {}
}
SQL {ROLLBACK;}
TEST 24 {
do_test $testid {
execsql {SELECT a, count(*) FROM abc GROUP BY a;}
} {1 16 4 16 7 16}
}
# Test some schema modifications inside of a transaction. These should all
# cause transaction rollback if they fail. Also query a view, to cover a bit
# more code.
#
PREP {DROP VIEW abc_v;}
TEST 25 {
do_test $testid {
execsql {
SELECT name, tbl_name FROM sqlite_master;
}
} {abc abc abc_i abc}
}
SQL {BEGIN;}
SQL {CREATE TABLE def(d, e, f);}
SQL {CREATE TABLE ghi(g, h, i);}
TEST 26 {
do_test $testid {
execsql {
SELECT name, tbl_name FROM sqlite_master;
}
} {abc abc abc_i abc def def ghi ghi}
}
SQL {CREATE VIEW v1 AS SELECT * FROM def, ghi}
SQL {CREATE UNIQUE INDEX ghi_i1 ON ghi(g);}
TEST 27 {
do_test $testid {
execsql {
SELECT name, tbl_name FROM sqlite_master;
}
} {abc abc abc_i abc def def ghi ghi v1 v1 ghi_i1 ghi}
}
SQL {INSERT INTO def VALUES('a', 'b', 'c')}
SQL {INSERT INTO def VALUES(1, 2, 3)}
SQL -norollback {INSERT INTO ghi SELECT * FROM def}
TEST 28 {
do_test $testid {
execsql {
SELECT * FROM def, ghi WHERE d = g;
}
} {a b c a b c 1 2 3 1 2 3}
}
SQL {COMMIT}
TEST 29 {
do_test $testid {
execsql {
SELECT * FROM v1 WHERE d = g;
}
} {a b c a b c 1 2 3 1 2 3}
}
# Test a simple multi-file transaction
#
file delete -force test2.db
PREP {ATTACH 'test2.db' AS aux;}
SQL {BEGIN}
SQL {CREATE TABLE aux.tbl2(x, y, z)}
SQL {INSERT INTO tbl2 VALUES(1, 2, 3)}
SQL {INSERT INTO def VALUES(4, 5, 6)}
TEST 30 {
do_test $testid {
execsql {
SELECT * FROM tbl2, def WHERE d = x;
}
} {1 2 3 1 2 3}
}
SQL {COMMIT}
TEST 31 {
do_test $testid {
execsql {
SELECT * FROM tbl2, def WHERE d = x;
}
} {1 2 3 1 2 3}
}
#
# End of test program declaration
#--------------------------------------------------------------------------
proc run_test {arglist {pcstart 0} {iFailStart 1}} {
if {[llength $arglist] %2} {
error "Uneven number of arguments to TEST"
}
for {set i 0} {$i < $pcstart} {incr i} {
set k2 [lindex $arglist [expr 2 * $i]]
set v2 [lindex $arglist [expr 2 * $i + 1]]
set ac [sqlite3_get_autocommit $::DB] ;# Auto-Commit
# puts "STARTUP"
switch -- $k2 {
-sql {db eval [lindex $v2 1]}
-prep {db eval $v2}
}
set nac [sqlite3_get_autocommit $::DB] ;# New Auto-Commit
if {$ac && !$nac} {set begin_pc $i}
}
set iFail $iFailStart
set pc $pcstart
while {$pc*2 < [llength $arglist]} {
# Id of this iteration:
set iterid "(pc $pc).(iFail $iFail)"
set k [lindex $arglist [expr 2 * $pc]]
set v [lindex $arglist [expr 2 * $pc + 1]]
switch -- $k {
-test {
foreach {id script} $v {}
set testid "malloc3-(test $id).$iterid"
eval $script
incr pc
}
-sql {
set ac [sqlite3_get_autocommit $::DB] ;# Auto-Commit
sqlite_malloc_fail $iFail
# puts "SQL $iterid [lindex $v 1]"
set rc [catch {db eval [lindex $v 1]} msg] ;# True error occurs
# puts "rc = $rc msg = \"$msg\""
set nac [sqlite3_get_autocommit $::DB] ;# New Auto-Commit
if {$rc == 0} {
# Successful execution of sql.
if {[lindex [sqlite_malloc_stat] 2] <= 0} {
error "Unreported malloc() failure"
}
if {$ac && !$nac} {
set begin_pc $pc
}
incr pc
set iFail 1
sqlite_malloc_fail 0
integrity_check "malloc3-(integrity).$iterid"
} elseif {[regexp {.*out of memory} $msg]} {
# Out of memory error, as expected
integrity_check "malloc3-(integrity).$iterid"
incr iFail
if {$nac && !$ac} {
if {![lindex $v 0]} {
error "Statement \"[lindex $v 1]\" caused a rollback"
}
# puts "Statement \"[lindex $v 1]\" caused a rollback"
for {set i $begin_pc} {$i < $pc} {incr i} {
set k2 [lindex $arglist [expr 2 * $i]]
set v2 [lindex $arglist [expr 2 * $i + 1]]
set catchupsql ""
switch -- $k2 {
-sql {set catchupsql [lindex $v2 1]}
-prep {set catchupsql $v2}
}
# puts "CATCHUP $iterid $i $catchupsql"
db eval $catchupsql
}
}
} else {
error $msg
}
while {[lindex $arglist [expr 2 * ($pc -1)]] == "-test"} {
incr pc -1
}
}
-prep {
# puts "PREP $iterid $v"
db eval $v
incr pc
}
default { error "Unknown switch: $k" }
}
}
}
# Turn of the Tcl interface's prepared statement caching facility.
db cache size 0
#run_test $::run_test_script 59 97
run_test $::run_test_script
sqlite_malloc_fail 0
finish_test