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SQLITE_ENABLE_SNAPSHOT. FossilOrigin-Name: 6821c61f1d71be2be7f867e59fd94582a1eaf45a4d1fb88be995807a77cc22ea
252 lines
7.3 KiB
Plaintext
252 lines
7.3 KiB
Plaintext
# 2015 December 10
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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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# This file implements regression tests for SQLite library. The focus
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# of this file is the sqlite3_snapshot_xxx() APIs.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable !snapshot {finish_test; return}
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set testprefix snapshot_fault
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#-------------------------------------------------------------------------
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# Check that an sqlite3_snapshot_open() client cannot be tricked into
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# reading a corrupt snapshot even if a second client fails while
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# checkpointing the db.
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#
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do_faultsim_test 1.0 -prep {
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faultsim_delete_and_reopen
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sqlite3 db2 test.db
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db2 eval {
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CREATE TABLE t1(a, b UNIQUE, c UNIQUE);
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INSERT INTO t1 VALUES(1, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(2, randomblob(500), randomblob(500));
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PRAGMA journal_mode = wal;
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INSERT INTO t1 VALUES(3, randomblob(500), randomblob(500));
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BEGIN;
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SELECT a FROM t1;
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}
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set ::snapshot [sqlite3_snapshot_get db2 main]
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db2 eval COMMIT
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db2 eval {
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UPDATE t1 SET b=randomblob(501), c=randomblob(501) WHERE a=1;
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INSERT INTO t1 VALUES(4, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(5, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(6, randomblob(500), randomblob(500));
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}
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} -body {
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db eval { PRAGMA wal_checkpoint }
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} -test {
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db2 eval BEGIN
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if {[catch { sqlite3_snapshot_open db2 main $::snapshot } msg]} {
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if {$msg != "SQLITE_ERROR_SNAPSHOT" && $msg != "SQLITE_BUSY"} {
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error "error is $msg"
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}
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} else {
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set res [db2 eval {
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SELECT a FROM t1;
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PRAGMA integrity_check;
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}]
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if {$res != "1 2 3 ok"} { error "res is $res" }
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}
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sqlite3_snapshot_free $::snapshot
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}
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#-------------------------------------------------------------------------
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# This test is similar to the previous one. Except, after the
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# "PRAGMA wal_checkpoint" command fails the db is closed and reopened
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# so as to require wal file recovery. It should not be possible to open
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# a snapshot that is part of the body of a recovered wal file.
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#
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do_faultsim_test 2.0 -prep {
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faultsim_delete_and_reopen
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db eval {
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CREATE TABLE t1(a, b UNIQUE, c UNIQUE);
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INSERT INTO t1 VALUES(1, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(2, randomblob(500), randomblob(500));
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PRAGMA journal_mode = wal;
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INSERT INTO t1 VALUES(3, randomblob(500), randomblob(500));
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BEGIN;
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SELECT a FROM t1;
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}
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set ::snapshot [sqlite3_snapshot_get db main]
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db eval COMMIT
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db eval {
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UPDATE t1 SET b=randomblob(501), c=randomblob(501) WHERE a=1;
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INSERT INTO t1 VALUES(4, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(5, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(6, randomblob(500), randomblob(500));
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}
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} -body {
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db eval { PRAGMA wal_checkpoint }
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} -test {
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db_save
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db close
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db_restore_and_reopen
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db eval { SELECT * FROM t1 }
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db eval BEGIN
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if {[catch { sqlite3_snapshot_open db main $::snapshot } msg]} {
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if {$msg != "SQLITE_ERROR_SNAPSHOT" && $msg != "SQLITE_BUSY"} {
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error "error is $msg"
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}
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} else {
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# This branch should actually never be taken. But it was useful in
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# determining whether or not this test was actually working (by
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# running a modified version of SQLite that allowed snapshots to be
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# opened following a recovery).
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error "TEST HAS FAILED"
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set res [db eval {
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SELECT a FROM t1;
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PRAGMA integrity_check;
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}]
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if {$res != "1 2 3 ok"} { error "res is $res" }
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}
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sqlite3_snapshot_free $::snapshot
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}
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#-------------------------------------------------------------------------
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# Test the handling of faults that occur within sqlite3_snapshot_open().
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#
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do_faultsim_test 3.0 -prep {
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faultsim_delete_and_reopen
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db eval {
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CREATE TABLE t1(a, b UNIQUE, c UNIQUE);
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INSERT INTO t1 VALUES(1, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(2, randomblob(500), randomblob(500));
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PRAGMA journal_mode = wal;
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INSERT INTO t1 VALUES(3, randomblob(500), randomblob(500));
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BEGIN;
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SELECT a FROM t1;
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}
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set ::snapshot [sqlite3_snapshot_get db main]
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db eval COMMIT
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db eval {
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UPDATE t1 SET b=randomblob(501), c=randomblob(501) WHERE a=1;
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INSERT INTO t1 VALUES(4, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(5, randomblob(500), randomblob(500));
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INSERT INTO t1 VALUES(6, randomblob(500), randomblob(500));
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BEGIN;
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}
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} -body {
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if { [catch { sqlite3_snapshot_open db main $::snapshot } msg] } {
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error $msg
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}
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} -test {
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faultsim_test_result {0 {}} {1 SQLITE_IOERR} {1 SQLITE_NOMEM} \
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{1 SQLITE_IOERR_NOMEM} {1 SQLITE_IOERR_READ}
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if {$testrc==0} {
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set res [db eval {
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SELECT a FROM t1;
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PRAGMA integrity_check;
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}]
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if {$res != "1 2 3 ok"} { error "res is $res" }
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}
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sqlite3_snapshot_free $::snapshot
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}
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#-------------------------------------------------------------------------
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# Test the handling of faults that occur within sqlite3_snapshot_recover().
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#
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reset_db
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do_execsql_test 4.0 {
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PRAGMA journal_mode = wal;
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CREATE TABLE t1(zzz);
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INSERT INTO t1 VALUES('abc');
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INSERT INTO t1 VALUES('def');
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} {wal}
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faultsim_save_and_close
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do_test 4.0.1 {
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faultsim_restore_and_reopen
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db eval { SELECT * FROM sqlite_master }
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sqlite3_snapshot_recover db main
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} {}
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db close
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do_faultsim_test 4.0 -faults oom* -prep {
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faultsim_restore_and_reopen
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db eval { SELECT * FROM sqlite_master }
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} -body {
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sqlite3_snapshot_recover db main
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} -test {
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faultsim_test_result {0 {}} {1 SQLITE_NOMEM} {1 SQLITE_IOERR_NOMEM}
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}
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# The following test cases contrive to call sqlite3_snapshot_recover()
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# before all pages of the *-shm file have been mapped. This tests an
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# extra branch of error handling logic in snapshot_recover().
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#
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reset_db
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do_execsql_test 4.1.0 {
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PRAGMA page_size = 512;
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PRAGMA journal_mode = wal;
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PRAGMA wal_autocheckpoint = 0;
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CREATE TABLE t1(zzz);
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INSERT INTO t1 VALUES(randomblob( 500 * 9500 ));
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PRAGMA user_version = 211;
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} {wal 0}
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do_test 4.1.1 {
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list [file size test.db-shm] [file size test.db]
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} {98304 512}
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faultsim_save_and_close
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do_faultsim_test 4.1 -faults shm* -prep {
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catch { db2 close }
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catch { db close }
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faultsim_restore_and_reopen
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sqlite3 db2 test.db
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db2 eval { SELECT * FROM sqlite_master }
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db eval BEGIN
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sqlite3_snapshot_get_blob db main
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db eval COMMIT
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} -body {
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sqlite3_snapshot_recover db main
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} -test {
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faultsim_test_result {0 {}} {1 SQLITE_IOERR}
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}
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#-------------------------------------------------------------------------
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# Test the handling of faults that occur within sqlite3_snapshot_get().
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#
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reset_db
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do_execsql_test 5.0 {
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PRAGMA page_size = 512;
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PRAGMA journal_mode = wal;
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PRAGMA wal_autocheckpoint = 0;
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CREATE TABLE t1(zzz);
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INSERT INTO t1 VALUES(randomblob( 5000 ));
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PRAGMA user_version = 211;
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} {wal 0}
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faultsim_save_and_close
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do_faultsim_test 5 -prep {
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faultsim_restore_and_reopen
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execsql { SELECT count(*) FROM sqlite_master }
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execsql BEGIN
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} -body {
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sqlite3_snapshot_get_blob db main
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set {} {}
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} -test {
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execsql END
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faultsim_test_result {0 {}} {1 SQLITE_IOERR} {1 SQLITE_NOMEM}
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}
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finish_test
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