564 lines
15 KiB
Plaintext
564 lines
15 KiB
Plaintext
# 2007 May 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
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# focus of this file is generating semi-random strings of SQL
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# (a.k.a. "fuzz") and sending it into the parser to try to
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# generate errors.
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#
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# The tests in this file are really about testing fuzzily generated
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# SQL parse-trees. The majority of the fuzzily generated SQL is
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# valid as far as the parser is concerned.
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#
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# The most complicated trees are for SELECT statements.
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#
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# $Id: fuzz.test,v 1.9 2007/05/14 15:49:44 danielk1977 Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# set ::REPEATS 20
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set ::REPEATS 5000
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proc fuzz {TemplateList} {
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set n [llength $TemplateList]
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set i [expr {int(rand()*$n)}]
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set r [uplevel 1 subst -novar [list [lindex $TemplateList $i]]]
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string map {"\n" " "} $r
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}
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# Fuzzy generation primitives:
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#
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# Literal
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# UnaryOp
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# BinaryOp
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# Expr
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# Table
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# Select
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# Insert
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#
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# Returns a string representing an SQL literal.
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#
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proc Literal {} {
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set TemplateList {
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456 0 -456 1 -1
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2147483648 2147483647 2147483649 -2147483647 -2147483648 -2147483649
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'The' 'first' 'experiments' 'in' 'hardware' 'fault' 'injection'
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zeroblob(1000)
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NULL
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56.1 -56.1
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123456789.1234567899
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}
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fuzz $TemplateList
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}
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# Returns a string containing an SQL unary operator (e.g. "+" or "NOT").
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#
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proc UnaryOp {} {
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set TemplateList {+ - NOT ~}
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fuzz $TemplateList
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}
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# Returns a string containing an SQL binary operator (e.g. "*" or "/").
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#
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proc BinaryOp {} {
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set TemplateList {
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|| * / % + - << >> & | < <= > >= = == != <> AND OR
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LIKE GLOB {NOT LIKE}
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}
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fuzz $TemplateList
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}
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# Return the complete text of an SQL expression.
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#
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set ::ExprDepth 0
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proc Expr { {c {}} } {
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incr ::ExprDepth
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set TemplateList [concat $c $c $c {[Literal]}]
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if {$::ExprDepth < 3} {
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lappend TemplateList \
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{[Expr $c] [BinaryOp] [Expr $c]} \
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{[UnaryOp] [Expr $c]} \
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{[Expr $c] ISNULL} \
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{[Expr $c] NOTNULL} \
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{CAST([Expr $c] AS blob)} \
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{CAST([Expr $c] AS text)} \
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{CAST([Expr $c] AS integer)} \
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{CAST([Expr $c] AS real)} \
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{abs([Expr])} \
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{coalesce([Expr], [Expr])} \
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{hex([Expr])} \
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{length([Expr])} \
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{lower([Expr])} \
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{upper([Expr])} \
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{quote([Expr])} \
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{random()} \
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{randomblob(min(max([Expr],1), 500))} \
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{typeof([Expr])} \
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{substr([Expr],[Expr],[Expr])} \
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{CASE WHEN [Expr $c] THEN [Expr $c] ELSE [Expr $c] END} \
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{[Literal]} {[Literal]} {[Literal]} \
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{[Literal]} {[Literal]} {[Literal]} \
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{[Literal]} {[Literal]} {[Literal]} \
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{[Literal]} {[Literal]} {[Literal]}
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}
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if {$::SelectDepth < 4} {
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lappend TemplateList \
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{([Select 1])} \
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{[Expr $c] IN ([Select 1])} \
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{[Expr $c] NOT IN ([Select 1])} \
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{EXISTS ([Select 1])} \
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}
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set res [fuzz $TemplateList]
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incr ::ExprDepth -1
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return $res
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}
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# Return a valid table name.
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#
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set ::TableList [list]
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proc Table {} {
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set TemplateList [concat sqlite_master $::TableList]
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fuzz $TemplateList
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}
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# Return one of:
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#
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# "SELECT DISTINCT", "SELECT ALL" or "SELECT"
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#
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proc SelectKw {} {
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set TemplateList {
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"SELECT DISTINCT"
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"SELECT ALL"
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"SELECT"
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}
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fuzz $TemplateList
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}
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# Return a result set for a SELECT statement.
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#
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proc ResultSet {{nRes 0} {c ""}} {
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if {$nRes == 0} {
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set nRes [expr {rand()*2 + 1}]
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}
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set aRes [list]
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for {set ii 0} {$ii < $nRes} {incr ii} {
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lappend aRes [Expr $c]
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}
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join $aRes ", "
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}
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set ::SelectDepth 0
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set ::ColumnList [list]
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proc SimpleSelect {{nRes 0}} {
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set TemplateList {
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{[SelectKw] [ResultSet $nRes]}
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}
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# The ::SelectDepth variable contains the number of ancestor SELECT
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# statements (i.e. for a top level SELECT it is set to 0, for a
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# sub-select 1, for a sub-select of a sub-select 2 etc.).
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#
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# If this is already greater than 3, do not generate a complicated
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# SELECT statement. This tends to cause parser stack overflow (too
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# boring to bother with).
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#
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if {$::SelectDepth < 4} {
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lappend TemplateList \
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{[SelectKw] [ResultSet $nRes $::ColumnList] FROM ([Select])} \
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{[SelectKw] [ResultSet $nRes] FROM ([Select])} \
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{[SelectKw] [ResultSet $nRes $::ColumnList] FROM [Table]} \
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{
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[SelectKw] [ResultSet $nRes $::ColumnList]
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FROM ([Select])
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GROUP BY [Expr]
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HAVING [Expr]
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} \
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if {0 == $nRes} {
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lappend TemplateList \
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{[SelectKw] * FROM ([Select])} \
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{[SelectKw] * FROM [Table]} \
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{[SelectKw] * FROM [Table] WHERE [Expr $::ColumnList]} \
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{
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[SelectKw] *
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FROM [Table],[Table] AS t2
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WHERE [Expr $::ColumnList]
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} {
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[SelectKw] *
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FROM [Table] LEFT OUTER JOIN [Table] AS t2
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ON [Expr $::ColumnList]
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WHERE [Expr $::ColumnList]
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}
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}
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}
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fuzz $TemplateList
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}
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# Return a SELECT statement.
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#
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# If boolean parameter $isExpr is set to true, make sure the
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# returned SELECT statement returns a single column of data.
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#
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proc Select {{nMulti 0}} {
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set TemplateList {
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{[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]}
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{[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]}
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{[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]}
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{[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]} {[SimpleSelect $nMulti]}
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{[SimpleSelect $nMulti] ORDER BY [Expr] DESC}
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{[SimpleSelect $nMulti] ORDER BY [Expr] ASC}
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{[SimpleSelect $nMulti] ORDER BY [Expr] ASC, [Expr] DESC}
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{[SimpleSelect $nMulti] ORDER BY [Expr] LIMIT [Expr] OFFSET [Expr]}
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}
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if {$::SelectDepth < 4} {
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if {$nMulti == 0} {
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set nMulti [expr {(rand()*2)+1}]
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}
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lappend TemplateList \
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{[SimpleSelect $nMulti] UNION [Select $nMulti]} \
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{[SimpleSelect $nMulti] UNION ALL [Select $nMulti]} \
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{[SimpleSelect $nMulti] EXCEPT [Select $nMulti]} \
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{[SimpleSelect $nMulti] INTERSECT [Select $nMulti]}
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}
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incr ::SelectDepth
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set res [fuzz $TemplateList]
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incr ::SelectDepth -1
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set res
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}
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# Generate and return a fuzzy INSERT statement.
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#
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proc Insert {} {
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set TemplateList {
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{INSERT INTO [Table] VALUES([Expr], [Expr], [Expr]);}
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{INSERT INTO [Table] VALUES([Expr], [Expr], [Expr], [Expr]);}
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{INSERT INTO [Table] VALUES([Expr], [Expr]);}
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}
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fuzz $TemplateList
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}
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proc Column {} {
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fuzz $::ColumnList
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}
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# Generate and return a fuzzy UPDATE statement.
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#
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proc Update {} {
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set TemplateList {
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{UPDATE [Table]
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SET [Column] = [Expr $::ColumnList]
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WHERE [Expr $::ColumnList]}
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}
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fuzz $TemplateList
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}
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proc Delete {} {
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set TemplateList {
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{DELETE FROM [Table] WHERE [Expr $::ColumnList]}
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}
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fuzz $TemplateList
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}
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proc Statement {} {
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set TemplateList {
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{[Update]}
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{[Insert]}
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{[Select]}
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{[Delete]}
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}
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fuzz $TemplateList
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}
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# Return an identifier. This just chooses randomly from a fixed set
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# of strings.
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proc Identifier {} {
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set TemplateList {
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This just chooses randomly a fixed
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We would also thank the developers
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for their analysis Samba
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}
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fuzz $TemplateList
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}
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proc Check {} {
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# Use a large value for $::SelectDepth, because sub-selects are
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# not allowed in expressions used by CHECK constraints.
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#
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set sd $::SelectDepth
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set ::SelectDepth 500
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set TemplateList {
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{}
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{CHECK ([Expr])}
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}
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set res [fuzz $TemplateList]
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set ::SelectDepth $sd
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set res
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}
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proc Coltype {} {
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set TemplateList {
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{INTEGER PRIMARY KEY}
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{VARCHAR [Check]}
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{PRIMARY KEY}
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}
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fuzz $TemplateList
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}
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proc CreateTable {} {
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set TemplateList {
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{CREATE TABLE [Identifier]([Identifier] [Coltype], [Identifier] [Coltype])}
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{CREATE TEMP TABLE [Identifier]([Identifier] [Coltype])}
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}
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fuzz $TemplateList
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}
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########################################################################
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set ::log [open fuzzy.log w]
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#
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# Usage: do_fuzzy_test <testname> ?<options>?
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#
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# -template
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# -errorlist
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# -repeats
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#
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proc do_fuzzy_test {testname args} {
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set ::fuzzyopts(-errorlist) [list]
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set ::fuzzyopts(-repeats) $::REPEATS
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array set ::fuzzyopts $args
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lappend ::fuzzyopts(-errorlist) {parser stack overflow}
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lappend ::fuzzyopts(-errorlist) {ORDER BY}
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lappend ::fuzzyopts(-errorlist) {GROUP BY}
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lappend ::fuzzyopts(-errorlist) {datatype mismatch}
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for {set ii 0} {$ii < $::fuzzyopts(-repeats)} {incr ii} {
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do_test ${testname}.$ii {
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set ::sql [subst $::fuzzyopts(-template)]
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puts $::log $::sql
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flush $::log
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set rc [catch {execsql $::sql} msg]
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set e 1
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if {$rc} {
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set e 0
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foreach error $::fuzzyopts(-errorlist) {
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if {0 == [string first $error $msg]} {
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set e 1
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break
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}
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}
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}
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if {$e == 0} {
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puts ""
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puts $::sql
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puts $msg
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}
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set e
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} {1}
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}
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}
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#----------------------------------------------------------------
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# These tests caused errors that were first caught by the tests
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# in this file. They are still here.
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do_test fuzz-1.1 {
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execsql {
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SELECT 'abc' LIKE X'ABCD';
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}
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} {0}
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do_test fuzz-1.2 {
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execsql {
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SELECT 'abc' LIKE zeroblob(10);
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}
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} {0}
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do_test fuzz-1.3 {
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execsql {
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SELECT zeroblob(10) LIKE 'abc';
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}
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} {0}
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do_test fuzz-1.4 {
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execsql {
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SELECT (- -21) % NOT (456 LIKE zeroblob(10));
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}
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} {0}
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do_test fuzz-1.5 {
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execsql {
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SELECT (SELECT (
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SELECT (SELECT -2147483648) FROM (SELECT 1) ORDER BY 1
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))
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}
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} {-2147483648}
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do_test fuzz-1.6 {
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execsql {
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SELECT 'abc', zeroblob(1) FROM (SELECT 1) ORDER BY 1
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}
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} [execsql {SELECT 'abc', zeroblob(1)}]
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do_test fuzz-1.7 {
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execsql {
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SELECT ( SELECT zeroblob(1000) FROM (
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SELECT * FROM (SELECT 'first') ORDER BY NOT 'in')
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)
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}
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} [execsql {SELECT zeroblob(1000)}]
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do_test fuzz-1.8 {
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# Problems with opcode OP_ToText (did not account for MEM_Zero).
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# Also MemExpandBlob() was marking expanded blobs as nul-terminated.
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# They are not.
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execsql {
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SELECT CAST(zeroblob(1000) AS text);
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}
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} {{}}
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do_test fuzz-1.9 {
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# This was causing a NULL pointer dereference of Expr.pList.
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execsql {
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SELECT 1 FROM (SELECT * FROM sqlite_master WHERE random())
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}
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} {}
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do_test fuzz-1.10 {
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# Bug in calculation of Parse.ckOffset causing an assert()
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# to fail. Probably harmless.
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execsql {
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SELECT coalesce(1, substr( 1, 2, length('in' IN (SELECT 1))))
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}
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} {1}
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do_test fuzz-1.11 {
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# The literals (A, B, C, D) are not important, they are just used
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# to make the EXPLAIN output easier to read.
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#
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# The problem here is that the EXISTS(...) expression leaves an
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# extra value on the VDBE stack. This is confusing the parent and
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# leads to an assert() failure when OP_Insert encounters an integer
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# when it expects a record blob.
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#
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# Update: Any query with (LIMIT 0) was leaking stack.
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#
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execsql {
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SELECT 'A' FROM (SELECT 'B') ORDER BY EXISTS (
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SELECT 'C' FROM (SELECT 'D' LIMIT 0)
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)
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}
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} {A}
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do_test fuzz-1.12.1 {
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# Create a table with a single row.
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execsql {
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CREATE TABLE abc(b);
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INSERT INTO abc VALUES('ABCDE');
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}
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# The following query was crashing. The later subquery (in the FROM)
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# clause was flattened into the parent, but the code was not repairng
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# the "b" reference in the other sub-query. When the query was executed,
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# that "b" refered to a non-existant vdbe table-cursor.
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#
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execsql {
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SELECT 1 IN ( SELECT b UNION SELECT 1 ) FROM (SELECT b FROM abc);
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}
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} {1}
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do_test fuzz-1.12.2 {
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# Clean up after the previous query.
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execsql {
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DROP TABLE abc;
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}
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} {}
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#----------------------------------------------------------------
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# Test some fuzzily generated expressions.
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#
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do_fuzzy_test fuzz-2 -template { SELECT [Expr] }
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do_test fuzz-3.1 {
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execsql {
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CREATE TABLE abc(a, b, c);
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CREATE TABLE def(a, b, c);
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CREATE TABLE ghi(a, b, c);
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}
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} {}
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set ::TableList [list abc def ghi]
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#----------------------------------------------------------------
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# Test some fuzzily generated SELECT statements.
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#
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do_fuzzy_test fuzz-3.2 -template {[Select]}
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#----------------------------------------------------------------
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# Insert a small amount of data into the database and then run
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# some more generated SELECT statements.
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#
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do_test fuzz-4.1 {
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execsql {
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INSERT INTO abc VALUES(1, 2, 3);
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INSERT INTO abc VALUES(4, 5, 6);
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INSERT INTO abc VALUES(7, 8, 9);
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INSERT INTO def VALUES(1, 2, 3);
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INSERT INTO def VALUES(4, 5, 6);
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INSERT INTO def VALUES(7, 8, 9);
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INSERT INTO ghi VALUES(1, 2, 3);
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INSERT INTO ghi VALUES(4, 5, 6);
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INSERT INTO ghi VALUES(7, 8, 9);
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CREATE INDEX abc_i ON abc(a, b, c);
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CREATE INDEX def_i ON def(c, a, b);
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CREATE INDEX ghi_i ON ghi(b, c, a);
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}
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} {}
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do_fuzzy_test fuzz-4.2 -template {[Select]}
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#----------------------------------------------------------------
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# Test some fuzzy INSERT statements:
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#
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do_test fuzz-5.1 {execsql BEGIN} {}
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do_fuzzy_test fuzz-5.2 -template {[Insert]} -errorlist table
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integrity_check fuzz-5.2.integrity
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do_test fuzz-5.3 {execsql COMMIT} {}
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integrity_check fuzz-5.4.integrity
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#----------------------------------------------------------------
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# Now that there is data in the database, run some more SELECT
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# statements
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#
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set ::ColumnList [list a b c]
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set E {{no such col} {ambiguous column name}}
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do_fuzzy_test fuzz-6.1 -template {[Select]} -errorlist $E
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#----------------------------------------------------------------
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# Run some SELECTs, INSERTs, UPDATEs and DELETEs in a transaction.
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#
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set E {{no such col} {ambiguous column name} {table}}
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do_test fuzz-7.1 {execsql BEGIN} {}
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do_fuzzy_test fuzz-7.2 -template {[Statement]} -errorlist $E
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integrity_check fuzz-7.3.integrity
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do_test fuzz-7.4 {execsql COMMIT} {}
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integrity_check fuzz-7.5.integrity
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#----------------------------------------------------------------
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|
# Many CREATE TABLE statements:
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|
#
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|
do_fuzzy_test fuzz-8.1 -template {[CreateTable]} \
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|
-errorlist {table duplicate} -repeats 1000
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close $::log
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|
finish_test
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