path: root/tests/compile.test

# This file contains tests for the files tclCompile.c, tclCompCmds.c
# and tclLiteral.c
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands.  Sourcing this file into Tcl runs the tests and
# generates output for errors.  No output means no errors were found.
#
# Copyright (c) 1997 by Sun Microsystems, Inc.
# Copyright (c) 1998-1999 by Scriptics Corporation.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: compile.test,v 1.33 2004/10/26 16:46:15 dgp Exp $

package require tcltest 2
namespace import -force ::tcltest::*

# The following tests are very incomplete, although the rest of the
# test suite covers this file fairly well.

catch {rename p ""}
catch {namespace delete test_ns_compile}
catch {unset x}
catch {unset y}
catch {unset a}

test compile-1.1 {TclCompileString: look up cmds in proc ns, not current ns} {
    catch {namespace delete test_ns_compile}
    catch {unset x}
    set x 123
    namespace eval test_ns_compile {
        proc set {args} {
            global x
            lappend x test_ns_compile::set
        }
        proc p {} {
            set 0
        }
    }
    list [test_ns_compile::p] [set x]
} {{123 test_ns_compile::set} {123 test_ns_compile::set}}
test compile-1.2 {TclCompileString, error result is reset if TclGetLong determines word isn't an integer} {
    proc p {x} {info commands 3m}
    list [catch {p} msg] $msg
} {1 {wrong # args: should be "p x"}}
test compile-2.1 {TclCompileDollarVar: global scalar name with ::s} {
    catch {unset x}
    set x 123
    list $::x [expr {[lsearch -exact [info globals] x] != 0}]
} {123 1}
test compile-2.2 {TclCompileDollarVar: global scalar name with ::s} {
    catch {unset y}
    proc p {} {
        set ::y 789
        return $::y
    }
    list [p] $::y [expr {[lsearch -exact [info globals] y] != 0}]
} {789 789 1}
test compile-2.3 {TclCompileDollarVar: global array name with ::s} {
    catch {unset a}
    set ::a(1) 2
    list $::a(1) [set ::a($::a(1)) 3] $::a(2) [expr {[lsearch -exact [info globals] a] != 0}]
} {2 3 3 1}
test compile-2.4 {TclCompileDollarVar: global scalar name with ::s} {
    catch {unset a}
    proc p {} {
        set ::a(1) 1
        return $::a($::a(1))
    }
    list [p] $::a(1) [expr {[lsearch -exact [info globals] a] != 0}]
} {1 1 1}
test compile-2.5 {TclCompileDollarVar: global array, called as ${arrName(0)}} {
    catch {unset a}
    proc p {} {
	global a
        set a(1) 1
        return ${a(1)}$::a(1)$a(1)
    }
    list [p] $::a(1) [expr {[lsearch -exact [info globals] a] != 0}]
} {111 1 1}

test compile-3.1 {TclCompileCatchCmd: only catch cmds with scalar vars are compiled inline} {
    catch {unset a}
    set a(1) xyzzyx
    proc p {} {
        global a
        catch {set x 123} a(1)
    }
    list [p] $a(1)
} {0 123}
test compile-3.2 {TclCompileCatchCmd: non-local variables} {
    set ::foo 1
    proc catch-test {} {
	catch {set x 3} ::foo
    }
    catch-test
    set ::foo
} 3
test compile-3.3 {TclCompileCatchCmd: overagressive compiling [bug 219184]} {
    proc catch-test {str} {
	catch [eval $str GOOD]
	error BAD
    }
    catch {catch-test error} ::foo
    set ::foo
} {GOOD}
test compile-3.4 {TclCompileCatchCmd: bcc'ed [return] is caught} {
    proc foo {} {
	set fail [catch {
	    return 1
	}] ; # {}	
	return 2
    }
    foo
} {2}
test compile-3.5 {TclCompileCatchCmd: recover from error, [Bug 705406]} {
    proc foo {} {
	catch {
	    if {[a]} {
		if b {}
	    }   
	}   
    }
    list [catch foo msg] $msg
} {0 1}

test compile-4.1 {TclCompileForCmd: command substituted test expression} {
    set i 0
    set j 0
    # Should be "forever"
    for {} [expr $i < 3] {} {
	set j [incr i]
	if {$j > 3} break
    }
    set j
} {4}

test compile-5.1 {TclCompileForeachCmd: exception stack} {
    proc foreach-exception-test {} {
	foreach array(index) [list 1 2 3] break
	foreach array(index) [list 1 2 3] break
	foreach scalar [list 1 2 3] break
    }
    list [catch foreach-exception-test result] $result
} {0 {}}
test compile-5.2 {TclCompileForeachCmd: non-local variables} {
    set ::foo 1
    proc foreach-test {} {
	foreach ::foo {1 2 3} {}
    }
    foreach-test
    set ::foo
} 3

test compile-6.1 {TclCompileSetCmd: global scalar names with ::s} {
    catch {unset x}
    catch {unset y}
    set x 123
    proc p {} {
        set ::y 789
        return $::y
    }
    list $::x [expr {[lsearch -exact [info globals] x] != 0}] \
         [p] $::y [expr {[lsearch -exact [info globals] y] != 0}]
} {123 1 789 789 1}
test compile-6.2 {TclCompileSetCmd: global array names with ::s} {
    catch {unset a}
    set ::a(1) 2
    proc p {} {
        set ::a(1) 1
        return $::a($::a(1))
    }
    list $::a(1) [p] [set ::a($::a(1)) 3] $::a(1) [expr {[lsearch -exact [info globals] a] != 0}]
} {2 1 3 3 1}
test compile-6.3 {TclCompileSetCmd: namespace var names with ::s} {
    catch {namespace delete test_ns_compile}
    catch {unset x}
    namespace eval test_ns_compile {
        variable v hello
        variable arr
        set ::x $::test_ns_compile::v
	set ::test_ns_compile::arr(1) 123
    }
    list $::x $::test_ns_compile::arr(1)
} {hello 123}

test compile-7.1 {TclCompileWhileCmd: command substituted test expression} {
    set i 0
    set j 0
    # Should be "forever"
    while [expr $i < 3] {
	set j [incr i]
	if {$j > 3} break
    }
    set j
} {4}

test compile-8.1 {CollectArgInfo: binary data} {
    list [catch "string length \000foo" msg] $msg
} {0 4}
test compile-8.2 {CollectArgInfo: binary data} {
    list [catch "string length foo\000" msg] $msg
} {0 4}
test compile-8.3 {CollectArgInfo: handle "]" at end of command properly} {
    set x ]
} {]}

test compile-9.1 {UpdateStringOfByteCode: called for duplicate of compiled empty object} {
    proc p {} {
        set x {}
        eval $x
        append x { }
        eval $x
    }
    p
} {}

test compile-10.1 {BLACKBOX: exception stack overflow} {
    set x {{0}}
    set y 0
    while {$y < 100} {
	if !$x {incr y}
    }
} {}

test compile-11.1 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} {
	# shared object - Interp result && Var 'r'
	set r [list foobar]
	# command that will add error to result
	lindex a bogus
    }
    list [catch {p} msg] $msg
} {1 {bad index "bogus": must be integer or end?-integer?}}
test compile-11.2 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; string index a bogus }
    list [catch {p} msg] $msg
} {1 {bad index "bogus": must be integer or end?-integer?}}
test compile-11.3 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; string index a 09 }
    list [catch {p} msg] $msg
} {1 {bad index "09": must be integer or end?-integer? (looks like invalid octal number)}}
test compile-11.4 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; array set var {one two many} }
    list [catch {p} msg] $msg
} {1 {list must have an even number of elements}}
test compile-11.5 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; incr foo }
    list [catch {p} msg] $msg
} {1 {can't read "foo": no such variable}}
test compile-11.6 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; incr foo bogus }
    list [catch {p} msg] $msg
} {1 {expected integer but got "bogus"}}
test compile-11.7 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; expr !a }
    list [catch {p} msg] $msg
} {1 {syntax error in expression "!a": variable references require preceding $}}
test compile-11.8 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; expr {!a} }
    list [catch {p} msg] $msg
} {1 {syntax error in expression "!a": variable references require preceding $}}
test compile-11.9 {Tcl_Append*: ensure Tcl_ResetResult is used properly} {
    proc p {} { set r [list foobar] ; llength "\{" }
    list [catch {p} msg] $msg
} {1 {unmatched open brace in list}}

# 
# Special section for tests of tclLiteral.c
# The following tests check for incorrect memory handling in
# TclReleaseLiteral. They are only effective when tcl is compiled 
# with TCL_MEM_DEBUG
#
# Special test for leak on interp delete [Bug 467523]. 
::tcltest::testConstraint exec [llength [info commands exec]]
::tcltest::testConstraint memory [llength [info commands memory]]

test compile-12.1 {testing literal leak on interp delete} {memory} {
    proc getbytes {} {
	set lines [split [memory info] "\n"]
	lindex [lindex $lines 3] 3
    }
    
    set end [getbytes]
    for {set i 0} {$i < 5} {incr i} {
	interp create foo 
	foo eval { 
	    namespace eval bar {}
	} 
	interp delete foo
	set tmp $end
	set end [getbytes]
    }    
    rename getbytes {}
    set leak [expr {$end - $tmp}]
} 0
# Special test for a memory error in a preliminary fix of [Bug 467523]. 
# It requires executing a helpfile.  Presumably the child process is
# used because when this test fails, it crashes.
test compile-12.2 {testing error on literal deletion} {memory exec} {
    makeFile {
	for {set i 0} {$i < 5} {incr i} {
	    namespace eval bar {}
	    namespace delete bar
	}
	puts 0
    } source.file
    set res [catch {
	exec [interpreter] source.file 
    }]
    catch {removeFile source.file}
    set res
} 0
# Test to catch buffer overrun in TclCompileTokens from buf 530320
test compile-12.3 {check for a buffer overrun} {
    proc crash {} {
	puts $array([expr {a+2}])
    }
    list [catch crash msg] $msg
} {1 {syntax error in expression "a+2": variable references require preceding $}}

test compile-12.4 {TclCleanupLiteralTable segfault} {
    # Tcl Bug 1001997
    # Here, we're trying to test a case that causes a crash in
    # TclCleanupLiteralTable.  The conditions that we're trying to
    # establish are:
    # - TclCleanupLiteralTable is attempting to clean up a bytecode
    #   object in the literal table.
    # - The bytecode object in question contains the only reference
    #   to another literal.
    # - The literal in question is in the same hash bucket as the bytecode
    #   object, and immediately follows it in the chain.
    # Since newly registered literals are added at the FRONT of the
    # bucket chains, and since the bytecode object is registered before
    # its literals, this is difficult to achieve.  What we do is:
    #  (a) do a [namespace eval] of a string that's calculated to
    #      hash into the same bucket as a literal that it contains.
    #      In this case, the script and the variable 'bugbug' 
    #      land in the same bucket.
    #  (b) do a [namespace eval] of a string that contains enough
    #      literals to force TclRegisterLiteral to rebuild the global
    #      literal table.  The newly created hash buckets will contain
    #      the literals, IN REVERSE ORDER, thus putting the bytecode
    #      immediately ahead of 'bugbug' and 'bug4345bug'.  The bytecode
    #      object will contain the only references to those two literals.
    #  (c) Delete the interpreter to invoke TclCleanupLiteralTable
    #      and tickle the bug.
    proc foo {} {
    set i [interp create]
    $i eval {
	namespace eval ::w {concat 4649; variable bugbug}
	namespace eval ::w {
	    concat x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 \
		x11 x12 x13 x14 x15 x16 x17 x18 x19 x20 \
		x21 x22 x23 x24 x25 x26 x27 x28 x29 x30 \
		x31 x32 X33 X34 X35 X36 X37 X38 X39 X40 \
		x41 x42 x43 x44 x45 x46 x47 x48 x49 x50 \
		x51 x52 x53 x54 x55 x56 x57 x58 x59 x60 \
		x61 x62 x63 x64
	    concat y1 y2 y3 y4 y5 y6 y7 y8 y9 y10 \
		y11 y12 y13 y14 y15 y16 y17 y18 y19 y20 \
		y21 y22 y23 y24 y25 y26 y27 y28 y29 y30 \
		y31 y32 Y33 Y34 Y35 Y36 Y37 Y38 Y39 Y40 \
		y41 y42 y43 y44 y45 y46 y47 y48 y49 y50 \
		y51 y52 y53 y54 y55 y56 y57 y58 y59 y60 \
		y61 y62 y63 y64
	    concat z1 z2 z3 z4 z5 z6 z7 z8 z9 z10 \
		z11 z12 z13 z14 z15 z16 z17 z18 z19 z20 \
		z21 z22 z23 z24 z25 z26 z27 z28 z29 z30 \
		z31 z32
	}
    }
    interp delete $i; # must not crash
    return ok
    }
    foo
} ok

# Special test for underestimating the maxStackSize required for a
# compiled command. A failure will cause a segfault in the child 
# process.
test compile-13.1 {testing underestimate of maxStackSize in list cmd} {exec} {
    set body {set x [list}
    for {set i 0} {$i < 3000} {incr i} {
	append body " $i"
    }
    append body {]; puts OK}
    regsub BODY {proc crash {} {BODY}; crash} $body script
    list [catch {exec [interpreter] << $script} msg] $msg
} {0 OK}

# Special test for compiling tokens from a copy of the source
# string [Bug #599788]
test compile-14.1 {testing errors in element name; segfault?} {} {
     catch {set a([error])} msg1
     catch {set bubba([join $abba $jubba]) $vol} msg2
     list $msg1 $msg2
} {{wrong # args: should be "error message ?errorInfo? ?errorCode?"} {can't read "abba": no such variable}}

# Tests compile-15.* cover Tcl Bug 633204
test compile-15.1 {proper TCL_RETURN code from [return]} {
    proc p {} {catch return}
    set result [p]
    rename p {}
    set result
} 2
test compile-15.2 {proper TCL_RETURN code from [return]} {
    proc p {} {catch {return foo}}
    set result [p]
    rename p {}
    set result
} 2
test compile-15.3 {proper TCL_RETURN code from [return]} {
    proc p {} {catch {return $::tcl_library}}
    set result [p]
    rename p {}
    set result
} 2
test compile-15.4 {proper TCL_RETURN code from [return]} {
    proc p {} {catch {return [info library]}}
    set result [p]
    rename p {}
    set result
} 2
test compile-15.5 {proper TCL_RETURN code from [return]} {
    proc p {} {catch {set a 1}; return}
    set result [p]
    rename p {}
    set result
} ""

testConstraint testevalex [llength [info commands testevalex]]
for {set noComp 0} {$noComp <= 1} {incr noComp} {

if $noComp {
    interp alias {} run {} testevalex
    set constraints testevalex
} else {
    interp alias {} run {} if 1
    set constraints {}
}

test compile-16.1.$noComp {TclCompileScript: word expansion} $constraints {
    run "list [string repeat {{expand}a } 255]"
} [lrepeat 255 a]

test compile-16.2.$noComp {TclCompileScript: word expansion} $constraints {
    run "list [string repeat {{expand}a } 256]"
} [lrepeat 256 a]

test compile-16.3.$noComp {TclCompileScript: word expansion} $constraints {
    run "list [string repeat {{expand}a } 257]"
} [lrepeat 257 a]

test compile-16.4.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list}
} {}

test compile-16.5.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list {expand}{x y z}}
} {x y z}

test compile-16.6.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list {expand}[list x y z]}
} {x y z}

test compile-16.7.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list {expand}[list x y z][list x y z]}
} {x y zx y z}

test compile-16.8.$noComp {TclCompileScript: word expansion} -body {
    set l {x y z}
    run {{expand}list {expand}$l}
} -constraints $constraints -cleanup {
    unset l
} -result {x y z}

test compile-16.9.$noComp {TclCompileScript: word expansion} -body {
    set l {x y z}
    run {{expand}list {expand}$l$l}
} -constraints $constraints -cleanup {
    unset l
} -result {x y zx y z}

test compile-16.10.$noComp {TclCompileScript: word expansion} -body {
    run {{expand}\{}
} -constraints $constraints -returnCodes error \
-result {unmatched open brace in list}

test compile-16.11.$noComp {TclCompileScript: word expansion} -body {
    proc badList {} {return \{}
    run {{expand}[badList]}
} -constraints $constraints -cleanup {
    rename badList {}
} -returnCodes error  -result {unmatched open brace in list}

test compile-16.12.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list x y z}
} {x y z}

test compile-16.13.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list x y {expand}z}
} {x y z}

test compile-16.14.$noComp {TclCompileScript: word expansion} $constraints {
    run {{expand}list x {expand}y z}
} {x y z}

test compile-16.15.$noComp {TclCompileScript: word expansion} $constraints {
    run {list x y {expand}z}
} {x y z}

test compile-16.16.$noComp {TclCompileScript: word expansion} $constraints {
    run {list x {expand}y z}
} {x y z}

test compile-16.17.$noComp {TclCompileScript: word expansion} $constraints {
    run {list {expand}x y z}
} {x y z}

# These tests note that expansion can in theory cause the number of
# arguments to a command to exceed INT_MAX, which is as big as objc
# is allowed to get.
#
# In practice, it seems we will run out of memory before we confront
# this issue.  Note that compiled operations run out of memory at
# smaller objc values than direct string evaluation.
#
# These tests are constrained as knownBug because they are likely
# to cause memory allocation panics somewhere, and we don't want
# panics in the test suite.
#
test compile-16.18.$noComp {TclCompileScript: word expansion} -body {
    proc LongList {} {return [lrepeat [expr {1<<10}] x]}
    llength [run "list [string repeat {{expand}[LongList] } [expr {1<<10}]]"]
} -constraints [linsert $constraints 0 knownBug] -cleanup {
    rename LongList {}
} -returnCodes ok  -result [expr {1<<20}]

test compile-16.19.$noComp {TclCompileScript: word expansion} -body {
    proc LongList {} {return [lrepeat [expr {1<<11}] x]}
    llength [run "list [string repeat {{expand}[LongList] } [expr {1<<11}]]"]
} -constraints [linsert $constraints 0 knownBug] -cleanup {
    rename LongList {}
} -returnCodes ok  -result [expr {1<<22}]

test compile-16.20.$noComp {TclCompileScript: word expansion} -body {
    proc LongList {} {return [lrepeat [expr {1<<12}] x]}
    llength [run "list [string repeat {{expand}[LongList] } [expr {1<<12}]]"]
} -constraints [linsert $constraints 0 knownBug] -cleanup {
    rename LongList {}
} -returnCodes ok  -result [expr {1<<24}]

# This is the one that should cause overflow
test compile-16.21.$noComp {TclCompileScript: word expansion} -body {
    proc LongList {} {return [lrepeat [expr {1<<16}] x]}
    llength [run "list [string repeat {{expand}[LongList] } [expr {1<<16}]]"]
} -constraints [linsert $constraints 0 knownBug] -cleanup {
    rename LongList {}
} -returnCodes ok  -result [expr {wide(1)<<32}]

test compile-16.22.$noComp {
    Bug 845412: TclCompileScript: word expansion not mandatory
} -body {
    # This test may crash and will fail unless Bug 845412 is fixed.
    proc ReturnResults args {return $args}
    run "ReturnResults [string repeat {x } 260]"
} -constraints $constraints -cleanup {
    rename ReturnResults {}
} -returnCodes ok -result [string trim [string repeat {x } 260]]

test compile-16.23.$noComp {
    Bug 1032805: defer parse error until run time
} -constraints $constraints -body {
    namespace eval x {
	run {
	    proc if {a b} {uplevel 1 [list set $a $b]}
	    if 1 {syntax {}{}}
	}
    }
} -cleanup {
    namespace delete x
} -returnCodes ok -result {syntax {}{}}

}	;# End of noComp loop

# cleanup
catch {rename p ""}
catch {namespace delete test_ns_compile}
catch {unset x}
catch {unset y}
catch {unset a}
::tcltest::cleanupTests
return