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Make the ANALYZE command robust in the face of malloc() failures. (CVS 3989)
FossilOrigin-Name: c08658e1f8598941ebddddb98942b98cfcb86e7a
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drh
146
test/mallocA.test
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146
test/mallocA.test
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# 2007 April 30
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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 contains additional out-of-memory checks (see malloc.tcl).
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#
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# $Id: mallocA.test,v 1.1 2007/05/12 12:08:51 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Only run these tests if memory debugging is turned on.
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#
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if {[info command sqlite_malloc_stat]==""} {
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puts "Skipping malloc tests: not compiled with -DSQLITE_MEMDEBUG..."
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finish_test
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return
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}
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# Usage: do_malloc_test <test number> <options...>
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#
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# The first argument, <test number>, is an integer used to name the
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# tests executed by this proc. Options are as follows:
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#
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# -tclprep TCL script to run to prepare test.
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# -sqlprep SQL script to run to prepare test.
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# -tclbody TCL script to run with malloc failure simulation.
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# -sqlbody TCL script to run with malloc failure simulation.
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# -cleanup TCL script to run after the test.
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#
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# This command runs a series of tests to verify SQLite's ability
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# to handle an out-of-memory condition gracefully. It is assumed
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# that if this condition occurs a malloc() call will return a
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# NULL pointer. Linux, for example, doesn't do that by default. See
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# the "BUGS" section of malloc(3).
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#
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# Each iteration of a loop, the TCL commands in any argument passed
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# to the -tclbody switch, followed by the SQL commands in any argument
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# passed to the -sqlbody switch are executed. Each iteration the
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# Nth call to sqliteMalloc() is made to fail, where N is increased
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# each time the loop runs starting from 1. When all commands execute
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# successfully, the loop ends.
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#
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proc do_malloc_test {tn args} {
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array unset ::mallocopts
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array set ::mallocopts $args
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set ::go 1
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for {set ::n 1} {$::go && $::n < 50000} {incr ::n} {
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do_test mallocA-$tn.$::n {
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sqlite_malloc_fail 0
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catch {db close}
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catch {file delete -force test.db test.db-journal}
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catch {file copy test.db.bu test.db}
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sqlite3 db test.db
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set ::DB [sqlite3_connection_pointer db]
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# Execute any -tclprep and -sqlprep scripts.
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#
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if {[info exists ::mallocopts(-tclprep)]} {
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eval $::mallocopts(-tclprep)
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}
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if {[info exists ::mallocopts(-sqlprep)]} {
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execsql $::mallocopts(-sqlprep)
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}
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# Now set the ${::n}th malloc() to fail and execute the -tclbody and
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# -sqlbody scripts.
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#
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sqlite_malloc_fail $::n
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set ::mallocbody {}
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if {[info exists ::mallocopts(-tclbody)]} {
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append ::mallocbody "$::mallocopts(-tclbody)\n"
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}
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if {[info exists ::mallocopts(-sqlbody)]} {
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append ::mallocbody "db eval {$::mallocopts(-sqlbody)}"
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}
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set v [catch $::mallocbody msg]
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# If the test fails (if $v!=0) and the database connection actually
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# exists, make sure the failure code is SQLITE_NOMEM.
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if {$v && [info command db]=="db" && [info exists ::mallocopts(-sqlbody)]
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&& [db errorcode]!=7} {
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set v 999
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}
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set leftover [lindex [sqlite_malloc_stat] 2]
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if {$leftover>0} {
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if {$leftover>1} {puts "\nLeftover: $leftover\nReturn=$v Message=$msg"}
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set ::go 0
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if {$v} {
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puts "\nError message returned: $msg"
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} else {
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set v {1 1}
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}
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} else {
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set v2 [expr {$msg=="" || [regexp {out of memory} $msg]}]
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if {!$v2} {puts "\nError message returned: $msg"}
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lappend v $v2
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}
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} {1 1}
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if {[info exists ::mallocopts(-cleanup)]} {
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catch [list uplevel #0 $::mallocopts(-cleanup)] msg
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}
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}
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unset ::mallocopts
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}
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# Construct a test database
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#
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file delete -force test.db.bu
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db eval {
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CREATE TABLE t1(a,b,c);
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INSERT INTO t1 VALUES(1,2,3);
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INSERT INTO t1 VALUES(1,2,4);
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INSERT INTO t1 VALUES(2,3,4);
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CREATE INDEX t1i1 ON t1(a);
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CREATE INDEX t1i2 ON t1(b,c);
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CREATE TABLE t2(x,y,z);
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}
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db close
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file copy test.db test.db.bu
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sqlite3 db test.db
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do_malloc_test 1 -sqlbody {
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ANALYZE
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}
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# Ensure that no file descriptors were leaked.
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do_test malloc-99.X {
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catch {db close}
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set sqlite_open_file_count
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} {0}
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file delete -force test.db.bu
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sqlite_malloc_fail 0
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finish_test
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