# Commands covered: trace
#
# 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) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994 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: @(#) trace.test,v 1.5 2003/01/21 19:40:17 hunt Exp
if {[lsearch [namespace children] ::tcltest] == -1} {
package require tcltest
namespace import -force ::tcltest::*
}
proc traceScalar {name1 name2 op} {
global info
set info [list $name1 $name2 $op [catch {uplevel set $name1} msg] $msg]
}
proc traceScalarAppend {name1 name2 op} {
global info
lappend info $name1 $name2 $op [catch {uplevel set $name1} msg] $msg
}
proc traceArray {name1 name2 op} {
global info
set info [list $name1 $name2 $op [catch {uplevel set [set name1]($name2)} msg] $msg]
}
proc traceArray2 {name1 name2 op} {
global info
set info [list $name1 $name2 $op]
}
proc traceProc {name1 name2 op} {
global info
set info [concat $info [list $name1 $name2 $op]]
}
proc traceTag {tag args} {
global info
set info [concat $info $tag]
}
proc traceError {args} {
error "trace returned error"
}
proc traceCheck {cmd args} {
global info
set info [list [catch $cmd msg] $msg]
}
proc traceCrtElement {value name1 name2 op} {
uplevel set ${name1}($name2) $value
}
proc traceCommand {oldName newName op} {
global info
set info [list $oldName $newName $op]
}
test trace-0.0 {memory corruption in trace (Tcl Bug 484339)} {
# You may need Purify or Electric Fence to reliably
# see this one fail.
catch {unset z}
trace add variable z array {set z(foo) 1 ;#}
set res "names: [array names z]"
catch {unset ::z}
trace variable ::z w {unset ::z; error "memory corruption";#}
list [catch {set ::z 1} msg] $msg
} {1 {can't set "::z": memory corruption}}
# Read-tracing on variables
test trace-1.1 {trace variable reads} {
catch {unset x}
set info {}
trace add variable x read traceScalar
list [catch {set x} msg] $msg $info
} {1 {can't read "x": no such variable} {x {} read 1 {can't read "x": no such variable}}}
test trace-1.2 {trace variable reads} {
catch {unset x}
set x 123
set info {}
trace add variable x read traceScalar
list [catch {set x} msg] $msg $info
} {0 123 {x {} read 0 123}}
test trace-1.3 {trace variable reads} {
catch {unset x}
set info {}
trace add variable x read traceScalar
set x 123
set info
} {}
test trace-1.4 {trace array element reads} {
catch {unset x}
set info {}
trace add variable x(2) read traceArray
list [catch {set x(2)} msg] $msg $info
} {1 {can't read "x(2)": no such element in array} {x 2 read 1 {can't read "x(2)": no such element in array}}}
test trace-1.5 {trace array element reads} {
catch {unset x}
set x(2) zzz
set info {}
trace add variable x(2) read traceArray
list [catch {set x(2)} msg] $msg $info
} {0 zzz {x 2 read 0 zzz}}
test trace-1.6 {trace array element reads} {
catch {unset x}
set info {}
trace add variable x read traceArray2
proc p {} {
global x
set x(2) willi
return $x(2)
}
list [catch {p} msg] $msg $info
} {0 willi {x 2 read}}
test trace-1.7 {trace array element reads, create element undefined if nonexistant} {
catch {unset x}
set info {}
trace add variable x read q
proc q {name1 name2 op} {
global info
set info [list $name1 $name2 $op]
global $name1
set ${name1}($name2) wolf
}
proc p {} {
global x
set x(X) willi
return $x(Y)
}
list [catch {p} msg] $msg $info
} {0 wolf {x Y read}}
test trace-1.8 {trace reads on whole arrays} {
catch {unset x}
set info {}
trace add variable x read traceArray
list [catch {set x(2)} msg] $msg $info
} {1 {can't read "x(2)": no such variable} {}}
test trace-1.9 {trace reads on whole arrays} {
catch {unset x}
set x(2) zzz
set info {}
trace add variable x read traceArray
list [catch {set x(2)} msg] $msg $info
} {0 zzz {x 2 read 0 zzz}}
test trace-1.10 {trace variable reads} {
catch {unset x}
set x 444
set info {}
trace add variable x read traceScalar
unset x
set info
} {}
test trace-1.11 {read traces that modify the array structure} {
catch {unset x}
set x(bar) 0
trace variable x r {set x(foo) 1 ;#}
trace variable x r {unset -nocomplain x(bar) ;#}
array get x
} {}
test trace-1.12 {read traces that modify the array structure} {
catch {unset x}
set x(bar) 0
trace variable x r {unset -nocomplain x(bar) ;#}
trace variable x r {set x(foo) 1 ;#}
array get x
} {}
test trace-1.13 {read traces that modify the array structure} {
catch {unset x}
set x(bar) 0
trace variable x r {set x(foo) 1 ;#}
trace variable x r {unset -nocomplain x;#}
list [catch {array get x} res] $res
} {1 {can't read "x(bar)": no such variable}}
test trace-1.14 {read traces that modify the array structure} {
catch {unset x}
set x(bar) 0
trace variable x r {unset -nocomplain x;#}
trace variable x r {set x(foo) 1 ;#}
list [catch {array get x} res] $res
} {1 {can't read "x(bar)": no such variable}}
# Basic write-tracing on variables
test trace-2.1 {trace variable writes} {
catch {unset x}
set info {}
trace add variable x write traceScalar
set x 123
set info
} {x {} write 0 123}
test trace-2.2 {trace writes to array elements} {
catch {unset x}
set info {}
trace add variable x(33) write traceArray
set x(33) 444
set info
} {x 33 write 0 444}
test trace-2.3 {trace writes on whole arrays} {
catch {unset x}
set info {}
trace add variable x write traceArray
set x(abc) qq
set info
} {x abc write 0 qq}
test trace-2.4 {trace variable writes} {
catch {unset x}
set x 1234
set info {}
trace add variable x write traceScalar
set x
set info
} {}
test trace-2.5 {trace variable writes} {
catch {unset x}
set x 1234
set info {}
trace add variable x write traceScalar
unset x
set info
} {}
# append no longer triggers read traces when fetching the old values of
# variables before doing the append operation. However, lappend _does_
# still trigger these read traces. Also lappend triggers only one write
# trace: after appending all arguments to the list.
test trace-3.1 {trace variable read-modify-writes} {
catch {unset x}
set info {}
trace add variable x read traceScalarAppend
append x 123
append x 456
lappend x 789
set info
} {x {} read 0 123456}
test trace-3.2 {trace variable read-modify-writes} {
catch {unset x}
set info {}
trace add variable x {read write} traceScalarAppend
append x 123
lappend x 456
set info
} {x {} write 0 123 x {} read 0 123 x {} write 0 {123 456}}
# Basic unset-tracing on variables
test trace-4.1 {trace variable unsets} {
catch {unset x}
set info {}
trace add variable x unset traceScalar
catch {unset x}
set info
} {x {} unset 1 {can't read "x": no such variable}}
test trace-4.2 {variable mustn't exist during unset trace} {
catch {unset x}
set x 1234
set info {}
trace add variable x unset traceScalar
unset x
set info
} {x {} unset 1 {can't read "x": no such variable}}
test trace-4.3 {unset traces mustn't be called during reads and writes} {
catch {unset x}
set info {}
trace add variable x unset traceScalar
set x 44
set x
set info
} {}
test trace-4.4 {trace unsets on array elements} {
catch {unset x}
set x(0) 18
set info {}
trace add variable x(1) unset traceArray
catch {unset x(1)}
set info
} {x 1 unset 1 {can't read "x(1)": no such element in array}}
test trace-4.5 {trace unsets on array elements} {
catch {unset x}
set x(1) 18
set info {}
trace add variable x(1) unset traceArray
unset x(1)
set info
} {x 1 unset 1 {can't read "x(1)": no such element in array}}
test trace-4.6 {trace unsets on array elements} {
catch {unset x}
set x(1) 18
set info {}
trace add variable x(1) unset traceArray
unset x
set info
} {x 1 unset 1 {can't read "x(1)": no such variable}}
test trace-4.7 {trace unsets on whole arrays} {
catch {unset x}
set x(1) 18
set info {}
trace add variable x unset traceProc
catch {unset x(0)}
set info
} {}
test trace-4.8 {trace unsets on whole arrays} {
catch {unset x}
set x(1) 18
set x(2) 144
set x(3) 14
set info {}
trace add variable x unset traceProc
unset x(1)
set info
} {x 1 unset}
test trace-4.9 {trace unsets on whole arrays} {
catch {unset x}
set x(1) 18
set x(2) 144
set x(3) 14
set info {}
trace add variable x unset traceProc
unset x
set info
} {x {} unset}
# Array tracing on variables
test trace-5.1 {array traces fire on accesses via [array]} {
catch {unset x}
set x(b) 2
trace add variable x array traceArray2
set ::info {}
array set x {a 1}
set ::info
} {x {} array}
test trace-5.2 {array traces do not fire on normal accesses} {
catch {unset x}
set x(b) 2
trace add variable x array traceArray2
set ::info {}
set x(a) 1
set x(b) $x(a)
set ::info
} {}
test trace-5.3 {array traces do not outlive variable} {
catch {unset x}
trace add variable x array traceArray2
set ::info {}
set x(a) 1
unset x
array set x {a 1}
set ::info
} {}
test trace-5.4 {array traces properly listed in trace information} {
catch {unset x}
trace add variable x array traceArray2
set result [trace info variable x]
set result
} [list [list array traceArray2]]
test trace-5.5 {array traces properly listed in trace information} {
catch {unset x}
trace variable x a traceArray2
set result [trace vinfo x]
set result
} [list [list a traceArray2]]
test trace-5.6 {array traces don't fire on scalar variables} {
catch {unset x}
set x foo
trace add variable x array traceArray2
set ::info {}
catch {array set x {a 1}}
set ::info
} {}
test trace-5.7 {array traces fire for undefined variables} {
catch {unset x}
trace add variable x array traceArray2
set ::info {}
array set x {a 1}
set ::info
} {x {} array}
test trace-5.8 {array traces fire for undefined variables} {
catch {unset x}
trace add variable x array {set x(foo) 1 ;#}
set res "names: [array names x]"
} {names: foo}
# Trace multiple trace types at once.
test trace-6.1 {multiple ops traced at once} {
catch {unset x}
set info {}
trace add variable x {read write unset} traceProc
catch {set x}
set x 22
set x
set x 33
unset x
set info
} {x {} read x {} write x {} read x {} write x {} unset}
test trace-6.2 {multiple ops traced on array element} {
catch {unset x}
set info {}
trace add variable x(0) {read write unset} traceProc
catch {set x(0)}
set x(0) 22
set x(0)
set x(0) 33
unset x(0)
unset x
set info
} {x 0 read x 0 write x 0 read x 0 write x 0 unset}
test trace-6.3 {multiple ops traced on whole array} {
catch {unset x}
set info {}
trace add variable x {read write unset} traceProc
catch {set x(0)}
set x(0) 22
set x(0)
set x(0) 33
unset x(0)
unset x
set info
} {x 0 write x 0 read x 0 write x 0 unset x {} unset}
# Check order of invocation of traces
test trace-7.1 {order of invocation of traces} {
catch {unset x}
set info {}
trace add variable x read "traceTag 1"
trace add variable x read "traceTag 2"
trace add variable x read "traceTag 3"
catch {set x}
set x 22
set x
set info
} {3 2 1 3 2 1}
test trace-7.2 {order of invocation of traces} {
catch {unset x}
set x(0) 44
set info {}
trace add variable x(0) read "traceTag 1"
trace add variable x(0) read "traceTag 2"
trace add variable x(0) read "traceTag 3"
set x(0)
set info
} {3 2 1}
test trace-7.3 {order of invocation of traces} {
catch {unset x}
set x(0) 44
set info {}
trace add variable x(0) read "traceTag 1"
trace add variable x read "traceTag A1"
trace add variable x(0) read "traceTag 2"
trace add variable x read "traceTag A2"
trace add variable x(0) read "traceTag 3"
trace add variable x read "traceTag A3"
set x(0)
set info
} {A3 A2 A1 3 2 1}
# Check effects of errors in trace procedures
test trace-8.1 {error returns from traces} {
catch {unset x}
set x 123
set info {}
trace add variable x read "traceTag 1"
trace add variable x read traceError
list [catch {set x} msg] $msg $info
} {1 {can't read "x": trace returned error} {}}
test trace-8.2 {error returns from traces} {
catch {unset x}
set x 123
set info {}
trace add variable x write "traceTag 1"
trace add variable x write traceError
list [catch {set x 44} msg] $msg $info
} {1 {can't set "x": trace returned error} {}}
test trace-8.3 {error returns from traces} {
catch {unset x}
set x 123
set info {}
trace add variable x write traceError
list [catch {append x 44} msg] $msg $info
} {1 {can't set "x": trace returned error} {}}
test trace-8.4 {error returns from traces} {
catch {unset x}
set x 123
set info {}
trace add variable x unset "traceTag 1"
trace add variable x unset traceError
list [catch {unset x} msg] $msg $info
} {0 {} 1}
test trace-8.5 {error returns from traces} {
catch {unset x}
set x(0) 123
set info {}
trace add variable x(0) read "traceTag 1"
trace add variable x read "traceTag 2"
trace add variable x read traceError
trace add variable x read "traceTag 3"
list [catch {set x(0)} msg] $msg $info
} {1 {can't read "x(0)": trace returned error} 3}
test trace-8.6 {error returns from traces} {
catch {unset x}
set x 123
trace add variable x unset traceError
list [catch {unset x} msg] $msg
} {0 {}}
test trace-8.7 {error returns from traces} {
# This test just makes sure that the memory for the error message
# gets deallocated correctly when the trace is invoked again or
# when the trace is deleted.
catch {unset x}
set x 123
trace add variable x read traceError
catch {set x}
catch {set x}
trace remove variable x read traceError
} {}
test trace-8.8 {error returns from traces} {
# Yet more elaborate memory corruption testing that checks nothing
# bad happens when the trace deletes itself and installs something
# new. Alas, there is no neat way to guarantee that this test will
# fail if there is a problem, but that's life and with the new code
# it should *never* fail.
#
# Adapted from Bug #219393 reported by Don Porter.
catch {rename ::foo {}}
proc foo {old args} {
trace remove variable ::x write [list foo $old]
trace add variable ::x write [list foo $::x]
error "foo"
}
catch {unset ::x ::y}
set x junk
trace add variable ::x write [list foo $x]
for {set y 0} {$y<100} {incr y} {
catch {set x junk}
}
unset x
} {}
# Check to see that variables are expunged before trace
# procedures are invoked, so trace procedure can even manipulate
# a new copy of the variables.
test trace-9.1 {be sure variable is unset before trace is called} {
catch {unset x}
set x 33
set info {}
trace add variable x unset {traceCheck {uplevel set x}}
unset x
set info
} {1 {can't read "x": no such variable}}
test trace-9.2 {be sure variable is unset before trace is called} {
catch {unset x}
set x 33
set info {}
trace add variable x unset {traceCheck {uplevel set x 22}}
unset x
concat $info [list [catch {set x} msg] $msg]
} {0 22 0 22}
test trace-9.3 {be sure traces are cleared before unset trace called} {
catch {unset x}
set x 33
set info {}
trace add variable x unset {traceCheck {uplevel trace info variable x}}
unset x
set info
} {0 {}}
test trace-9.4 {set new trace during unset trace} {
catch {unset x}
set x 33
set info {}
trace add variable x unset {traceCheck {global x; trace add variable x unset traceProc}}
unset x
concat $info [trace info variable x]
} {0 {} {unset traceProc}}
test trace-10.1 {make sure array elements are unset before traces are called} {
catch {unset x}
set x(0) 33
set info {}
trace add variable x(0) unset {traceCheck {uplevel set x(0)}}
unset x(0)
set info
} {1 {can't read "x(0)": no such element in array}}
test trace-10.2 {make sure array elements are unset before traces are called} {
catch {unset x}
set x(0) 33
set info {}
trace add variable x(0) unset {traceCheck {uplevel set x(0) zzz}}
unset x(0)
concat $info [list [catch {set x(0)} msg] $msg]
} {0 zzz 0 zzz}
test trace-10.3 {array elements are unset before traces are called} {
catch {unset x}
set x(0) 33
set info {}
trace add variable x(0) unset {traceCheck {global x; trace info variable x(0)}}
unset x(0)
set info
} {0 {}}
test trace-10.4 {set new array element trace during unset trace} {
catch {unset x}
set x(0) 33
set info {}
trace add variable x(0) unset {traceCheck {uplevel {trace add variable x(0) read {}}}}
catch {unset x(0)}
concat $info [trace info variable x(0)]
} {0 {} {read {}}}
test trace-11.1 {make sure arrays are unset before traces are called} {
catch {unset x}
set x(0) 33
set info {}
trace add variable x unset {traceCheck {uplevel set x(0)}}
unset x
set info
} {1 {can't read "x(0)": no such variable}}
test trace-11.2 {make sure arrays are unset before traces are called} {
catch {unset x}
set x(y) 33
set info {}
trace add variable x unset {traceCheck {uplevel set x(y) 22}}
unset x
concat $info [list [catch {set x(y)} msg] $msg]
} {0 22 0 22}
test trace-11.3 {make sure arrays are unset before traces are called} {
catch {unset x}
set x(y) 33
set info {}
trace add variable x unset {traceCheck {uplevel array exists x}}
unset x
set info
} {0 0}
test trace-11.4 {make sure arrays are unset before traces are called} {
catch {unset x}
set x(y) 33
set info {}
set cmd {traceCheck {uplevel {trace info variable x}}}
trace add variable x unset $cmd
unset x
set info
} {0 {}}
test trace-11.5 {set new array trace during unset trace} {
catch {unset x}
set x(y) 33
set info {}
trace add variable x unset {traceCheck {global x; trace add variable x read {}}}
unset x
concat $info [trace info variable x]
} {0 {} {read {}}}
test trace-11.6 {create scalar during array unset trace} {
catch {unset x}
set x(y) 33
set info {}
trace add variable x unset {traceCheck {global x; set x 44}}
unset x
concat $info [list [catch {set x} msg] $msg]
} {0 44 0 44}
# Check special conditions (e.g. errors) in Tcl_TraceVar2.
test trace-12.1 {creating array when setting variable traces} {
catch {unset x}
set info {}
trace add variable x(0) write traceProc
list [catch {set x 22} msg] $msg
} {1 {can't set "x": variable is array}}
test trace-12.2 {creating array when setting variable traces} {
catch {unset x}
set info {}
trace add variable x(0) write traceProc
list [catch {set x(0)} msg] $msg
} {1 {can't read "x(0)": no such element in array}}
test trace-12.3 {creating array when setting variable traces} {
catch {unset x}
set info {}
trace add variable x(0) write traceProc
set x(0) 22
set info
} {x 0 write}
test trace-12.4 {creating variable when setting variable traces} {
catch {unset x}
set info {}
trace add variable x write traceProc
list [catch {set x} msg] $msg
} {1 {can't read "x": no such variable}}
test trace-12.5 {creating variable when setting variable traces} {
catch {unset x}
set info {}
trace add variable x write traceProc
set x 22
set info
} {x {} write}
test trace-12.6 {creating variable when setting variable traces} {
catch {unset x}
set info {}
trace add variable x write traceProc
set x(0) 22
set info
} {x 0 write}
test trace-12.7 {create array element during read trace} {
catch {unset x}
set x(2) zzz
trace add variable x read {traceCrtElement xyzzy}
list [catch {set x(3)} msg] $msg
} {0 xyzzy}
test trace-12.8 {errors when setting variable traces} {
catch {unset x}
set x 44
list [catch {trace add variable x(0) write traceProc} msg] $msg
} {1 {can't trace "x(0)": variable isn't array}}
# Check deleting one trace from another.
test trace-13.1 {delete one trace from another} {
proc delTraces {args} {
global x
trace remove variable x read {traceTag 2}
trace remove variable x read {traceTag 3}
trace remove variable x read {traceTag 4}
}
catch {unset x}
set x 44
set info {}
trace add variable x read {traceTag 1}
trace add variable x read {traceTag 2}
trace add variable x read {traceTag 3}
trace add variable x read {traceTag 4}
trace add variable x read delTraces
trace add variable x read {traceTag 5}
set x
set info
} {5 1}
# Check operation and syntax of "trace" command.
# Syntax for adding/removing variable and command traces is basically the
# same:
# trace add variable name opList command
# trace remove variable name opList command
#
# The following loops just get all the common "wrong # args" tests done.
set i 0
set start "wrong # args:"
foreach type {variable command} {
foreach op {add remove} {
test trace-14.0.[incr i] "trace command, wrong # args errors" {
list [catch {trace $op $type} msg] $msg
} [list 1 "$start should be \"trace $op $type name opList command\""]
test trace-14.0.[incr i] "trace command wrong # args errors" {
list [catch {trace $op $type foo} msg] $msg
} [list 1 "$start should be \"trace $op $type name opList command\""]
test trace-14.0.[incr i] "trace command, wrong # args errors" {
list [catch {trace $op $type foo bar} msg] $msg
} [list 1 "$start should be \"trace $op $type name opList command\""]
test trace-14.0.[incr i] "trace command, wrong # args errors" {
list [catch {trace $op $type foo bar baz boo} msg] $msg
} [list 1 "$start should be \"trace $op $type name opList command\""]
}
test trace-14.0.[incr i] "trace command, wrong # args errors" {
list [catch {trace info $type foo bar} msg] $msg
} [list 1 "$start should be \"trace info $type name\""]
test trace-14.0.[incr i] "trace command, wrong # args errors" {
list [catch {trace info $type} msg] $msg
} [list 1 "$start should be \"trace info $type name\""]
}
test trace-14.1 "trace command, wrong # args errors" {
list [catch {trace} msg] $msg
} [list 1 "wrong # args: should be \"trace option ?arg arg ...?\""]
test trace-14.2 "trace command, wrong # args errors" {
list [catch {trace add} msg] $msg
} [list 1 "wrong # args: should be \"trace add type ?arg arg ...?\""]
test trace-14.3 "trace command, wrong # args errors" {
list [catch {trace remove} msg] $msg
} [list 1 "wrong # args: should be \"trace remove type ?arg arg ...?\""]
test trace-14.4 "trace command, wrong # args errors" {
list [catch {trace info} msg] $msg
} [list 1 "wrong # args: should be \"trace info type ?arg arg ...?\""]
test trace-14.5 {trace command, invalid option} {
list [catch {trace gorp} msg] $msg
} [list 1 "bad option \"gorp\": must be add, info, remove, variable, vdelete, or vinfo"]
# Again, [trace ... command] and [trace ... variable] share syntax and
# error message styles for their opList options; these loops test those
# error messages.
set i 0
set errs [list "array, read, unset, or write" "delete or rename" "enter, leave, enterstep, or leavestep"]
set abbvs [list {a r u w} {d r} {}]
proc x {} {}
foreach type {variable command execution} err $errs abbvlist $abbvs {
foreach op {add remove} {
test trace-14.6.[incr i] "trace $op $type errors" {
list [catch {trace $op $type x {y z w} a} msg] $msg
} [list 1 "bad operation \"y\": must be $err"]
foreach abbv $abbvlist {
test trace-14.6.[incr i] "trace $op $type rejects abbreviations" {
list [catch {trace $op $type x $abbv a} msg] $msg
} [list 1 "bad operation \"$abbv\": must be $err"]
}
test trace-14.6.[incr i] "trace $op $type rejects null opList" {
list [catch {trace $op $type x {} a} msg] $msg
} [list 1 "bad operation list \"\": must be one or more of $err"]
}
}
rename x {}
test trace-14.7 {trace command, "trace variable" errors} {
list [catch {trace variable} msg] $msg
} [list 1 "wrong # args: should be \"trace variable name ops command\""]
test trace-14.8 {trace command, "trace variable" errors} {
list [catch {trace variable x} msg] $msg
} [list 1 "wrong # args: should be \"trace variable name ops command\""]
test trace-14.9 {trace command, "trace variable" errors} {
list [catch {trace variable x y} msg] $msg
} [list 1 "wrong # args: should be \"trace variable name ops command\""]
test trace-14.10 {trace command, "trace variable" errors} {
list [catch {trace variable x y z w} msg] $msg
} [list 1 "wrong # args: should be \"trace variable name ops command\""]
test trace-14.11 {trace command, "trace variable" errors} {
list [catch {trace variable x y z} msg] $msg
} [list 1 "bad operations \"y\": should be one or more of rwua"]
test trace-14.9 {trace command ("remove variable" option)} {
catch {unset x}
set info {}
trace add variable x write traceProc
trace remove variable x write traceProc
} {}
test trace-14.10 {trace command ("remove variable" option)} {
catch {unset x}
set info {}
trace add variable x write traceProc
trace remove variable x write traceProc
set x 12345
set info
} {}
test trace-14.11 {trace command ("remove variable" option)} {
catch {unset x}
set info {}
trace add variable x write {traceTag 1}
trace add variable x write traceProc
trace add variable x write {traceTag 2}
set x yy
trace remove variable x write traceProc
set x 12345
trace remove variable x write {traceTag 1}
set x foo
trace remove variable x write {traceTag 2}
set x gorp
set info
} {2 x {} write 1 2 1 2}
test trace-14.12 {trace command ("remove variable" option)} {
catch {unset x}
set info {}
trace add variable x write {traceTag 1}
trace remove variable x write non_existent
set x 12345
set info
} {1}
test trace-14.15 {trace command ("list variable" option)} {
catch {unset x}
trace add variable x write {traceTag 1}
trace add variable x write traceProc
trace add variable x write {traceTag 2}
trace info variable x
} {{write {traceTag 2}} {write traceProc} {write {traceTag 1}}}
test trace-14.16 {trace command ("list variable" option)} {
catch {unset x}
trace info variable x
} {}
test trace-14.17 {trace command ("list variable" option)} {
catch {unset x}
trace info variable x(0)
} {}
test trace-14.18 {trace command ("list variable" option)} {
catch {unset x}
set x 44
trace info variable x(0)
} {}
test trace-14.19 {trace command ("list variable" option)} {
catch {unset x}
set x 44
trace add variable x write {traceTag 1}
proc check {} {global x; trace info variable x}
check
} {{write {traceTag 1}}}
# Check fancy trace commands (long ones, weird arguments, etc.)
test trace-15.1 {long trace command} {
catch {unset x}
set info {}
trace add variable x write {traceTag {This is a very very long argument. It's \
designed to test out the facilities of TraceVarProc for dealing \
with such long arguments by malloc-ing space. One possibility \
is that space doesn't get freed properly. If this happens, then \
invoking this test over and over again will eventually leak memory.}}
set x 44
set info
} {This is a very very long argument. It's \
designed to test out the facilities of TraceVarProc for dealing \
with such long arguments by malloc-ing space. One possibility \
is that space doesn't get freed properly. If this happens, then \
invoking this test over and over again will eventually leak memory.}
test trace-15.2 {long trace command result to ignore} {
proc longResult {args} {return "quite a bit of text, designed to
generate a core leak if this command file is invoked over and over again
and memory isn't being recycled correctly"}
catch {unset x}
trace add variable x write longResult
set x 44
set x 5
set x abcde
} abcde
test trace-15.3 {special list-handling in trace commands} {
catch {unset "x y z"}
set "x y z(a\n\{)" 44
set info {}
trace add variable "x y z(a\n\{)" write traceProc
set "x y z(a\n\{)" 33
set info
} "{x y z} a\\n\\\{ write"
# Check for proper handling of unsets during traces.
proc traceUnset {unsetName args} {
global info
upvar $unsetName x
lappend info [catch {unset x} msg] $msg [catch {set x} msg] $msg
}
proc traceReset {unsetName resetName args} {
global info
upvar $unsetName x $resetName y
lappend info [catch {unset x} msg] $msg [catch {set y xyzzy} msg] $msg
}
proc traceReset2 {unsetName resetName args} {
global info
lappend info [catch {uplevel unset $unsetName} msg] $msg \
[catch {uplevel set $resetName xyzzy} msg] $msg
}
proc traceAppend {string name1 name2 op} {
global info
lappend info $string
}
test trace-16.1 {unsets during read traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y read {traceUnset y}
trace add variable y unset {traceAppend unset}
lappend info [catch {set y} msg] $msg
} {unset 0 {} 1 {can't read "x": no such variable} 1 {can't read "y": no such variable}}
test trace-16.2 {unsets during read traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) read {traceUnset y(0)}
lappend info [catch {set y(0)} msg] $msg
} {0 {} 1 {can't read "x": no such variable} 1 {can't read "y(0)": no such element in array}}
test trace-16.3 {unsets during read traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) read {traceUnset y}
lappend info [catch {set y(0)} msg] $msg
} {0 {} 1 {can't read "x": no such variable} 1 {can't read "y(0)": no such variable}}
test trace-16.4 {unsets during read traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y read {traceReset y y}
lappend info [catch {set y} msg] $msg
} {0 {} 0 xyzzy 0 xyzzy}
test trace-16.5 {unsets during read traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) read {traceReset y(0) y(0)}
lappend info [catch {set y(0)} msg] $msg
} {0 {} 0 xyzzy 0 xyzzy}
test trace-16.6 {unsets during read traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) read {traceReset y y(0)}
lappend info [catch {set y(0)} msg] $msg [catch {set y(0)} msg] $msg
} {0 {} 1 {can't set "y": upvar refers to element in deleted array} 1 {can't read "y(0)": no such variable} 1 {can't read "y(0)": no such variable}}
test trace-16.7 {unsets during read traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) read {traceReset2 y y(0)}
lappend info [catch {set y(0)} msg] $msg [catch {set y(0)} msg] $msg
} {0 {} 0 xyzzy 1 {can't read "y(0)": no such element in array} 0 xyzzy}
test trace-16.8 {unsets during write traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y write {traceUnset y}
trace add variable y unset {traceAppend unset}
lappend info [catch {set y xxx} msg] $msg
} {unset 0 {} 1 {can't read "x": no such variable} 0 {}}
test trace-16.9 {unsets during write traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) write {traceUnset y(0)}
lappend info [catch {set y(0) xxx} msg] $msg
} {0 {} 1 {can't read "x": no such variable} 0 {}}
test trace-16.10 {unsets during write traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) write {traceUnset y}
lappend info [catch {set y(0) xxx} msg] $msg
} {0 {} 1 {can't read "x": no such variable} 0 {}}
test trace-16.11 {unsets during write traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y write {traceReset y y}
lappend info [catch {set y xxx} msg] $msg
} {0 {} 0 xyzzy 0 xyzzy}
test trace-16.12 {unsets during write traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) write {traceReset y(0) y(0)}
lappend info [catch {set y(0) xxx} msg] $msg
} {0 {} 0 xyzzy 0 xyzzy}
test trace-16.13 {unsets during write traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) write {traceReset y y(0)}
lappend info [catch {set y(0) xxx} msg] $msg [catch {set y(0)} msg] $msg
} {0 {} 1 {can't set "y": upvar refers to element in deleted array} 0 {} 1 {can't read "y(0)": no such variable}}
test trace-16.14 {unsets during write traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) write {traceReset2 y y(0)}
lappend info [catch {set y(0) xxx} msg] $msg [catch {set y(0)} msg] $msg
} {0 {} 0 xyzzy 0 {} 0 xyzzy}
test trace-16.15 {unsets during unset traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y unset {traceUnset y}
lappend info [catch {unset y} msg] $msg [catch {set y} msg] $msg
} {1 {can't unset "x": no such variable} 1 {can't read "x": no such variable} 0 {} 1 {can't read "y": no such variable}}
test trace-16.16 {unsets during unset traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) unset {traceUnset y(0)}
lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
} {1 {can't unset "x": no such variable} 1 {can't read "x": no such variable} 0 {} 1 {can't read "y(0)": no such element in array}}
test trace-16.17 {unsets during unset traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) unset {traceUnset y}
lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
} {0 {} 1 {can't read "x": no such variable} 0 {} 1 {can't read "y(0)": no such variable}}
test trace-16.18 {unsets during unset traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y unset {traceReset2 y y}
lappend info [catch {unset y} msg] $msg [catch {set y} msg] $msg
} {1 {can't unset "y": no such variable} 0 xyzzy 0 {} 0 xyzzy}
test trace-16.19 {unsets during unset traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) unset {traceReset2 y(0) y(0)}
lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
} {1 {can't unset "y(0)": no such element in array} 0 xyzzy 0 {} 0 xyzzy}
test trace-16.20 {unsets during unset traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) unset {traceReset2 y y(0)}
lappend info [catch {unset y(0)} msg] $msg [catch {set y(0)} msg] $msg
} {0 {} 0 xyzzy 0 {} 0 xyzzy}
test trace-16.21 {unsets cancelling traces} {
catch {unset y}
set y 1234
set info {}
trace add variable y read {traceAppend first}
trace add variable y read {traceUnset y}
trace add variable y read {traceAppend third}
trace add variable y unset {traceAppend unset}
lappend info [catch {set y} msg] $msg
} {third unset 0 {} 1 {can't read "x": no such variable} 1 {can't read "y": no such variable}}
test trace-16.22 {unsets cancelling traces} {
catch {unset y}
set y(0) 1234
set info {}
trace add variable y(0) read {traceAppend first}
trace add variable y(0) read {traceUnset y}
trace add variable y(0) read {traceAppend third}
trace add variable y(0) unset {traceAppend unset}
lappend info [catch {set y(0)} msg] $msg
} {third unset 0 {} 1 {can't read "x": no such variable} 1 {can't read "y(0)": no such variable}}
# Check various non-interference between traces and other things.
test trace-17.1 {trace doesn't prevent unset errors} {
catch {unset x}
set info {}
trace add variable x unset {traceProc}
list [catch {unset x} msg] $msg $info
} {1 {can't unset "x": no such variable} {x {} unset}}
test trace-17.2 {traced variables must survive procedure exits} {
catch {unset x}
proc p1 {} {global x; trace add variable x write traceProc}
p1
trace info variable x
} {{write traceProc}}
test trace-17.3 {traced variables must survive procedure exits} {
catch {unset x}
set info {}
proc p1 {} {global x; trace add variable x write traceProc}
p1
set x 44
set info
} {x {} write}
# Be sure that procedure frames are released before unset traces
# are invoked.
test trace-18.1 {unset traces on procedure returns} {
proc p1 {x y} {set a 44; p2 14}
proc p2 {z} {trace add variable z unset {traceCheck {lsort [uplevel {info vars}]}}}
set info {}
p1 foo bar
set info
} {0 {a x y}}
test trace-18.2 {namespace delete / trace vdelete combo} {
namespace eval ::foo {
variable x 123
}
proc p1 args {
trace vdelete ::foo::x u p1
}
trace variable ::foo::x u p1
namespace delete ::foo
info exists ::foo::x
} 0
# Delete arrays when done, so they can be re-used as scalars
# elsewhere.
catch {unset x}
catch {unset y}
test trace-18.2 {trace add command (command existence)} {
# Just in case!
catch {rename nosuchname ""}
list [catch {trace add command nosuchname rename traceCommand} msg] $msg
} {1 {unknown command "nosuchname"}}
test trace-18.3 {trace add command (command existence in ns)} {
list [catch {trace add command nosuchns::nosuchname rename traceCommand} msg] $msg
} {1 {unknown command "nosuchns::nosuchname"}}
test trace-19.1 {trace add command (rename option)} {
proc foo {} {}
catch {rename bar {}}
trace add command foo rename traceCommand
rename foo bar
set info
} {foo bar rename}
test trace-19.2 {traces stick with renamed commands} {
proc foo {} {}
catch {rename bar {}}
trace add command foo rename traceCommand
rename foo bar
rename bar foo
set info
} {bar foo rename}
test trace-19.2.1 {trace add command rename trace exists} {
proc foo {} {}
trace add command foo rename traceCommand
trace info command foo
} {{rename traceCommand}}
test trace-19.3 {command rename traces don't fire on command deletion} {
proc foo {} {}
set info {}
trace add command foo rename traceCommand
rename foo {}
set info
} {}
test trace-19.4 {trace add command rename doesn't trace recreated commands} {
proc foo {} {}
catch {rename bar {}}
trace add command foo rename traceCommand
proc foo {} {}
rename foo bar
set info
} {}
test trace-19.5 {trace add command deleted removes traces} {
proc foo {} {}
trace add command foo rename traceCommand
proc foo {} {}
trace info command foo
} {}
namespace eval tc {}
proc tc::tcfoo {} {}
test trace-19.6 {trace add command rename in namespace} {
trace add command tc::tcfoo rename traceCommand
rename tc::tcfoo tc::tcbar
set info
} {tc::tcfoo tc::tcbar rename}
test trace-19.7 {trace add command rename in namespace back again} {
rename tc::tcbar tc::tcfoo
set info
} {tc::tcbar tc::tcfoo rename}
test trace-19.8 {trace add command rename in namespace to out of namespace} {
rename tc::tcfoo tcbar
set info
} {tc::tcfoo tcbar rename}
test trace-19.9 {trace add command rename back into namespace} {
rename tcbar tc::tcfoo
set info
} {tcbar tc::tcfoo rename}
test trace-19.10 {trace add command failed rename doesn't trigger trace} {
set info {}
proc foo {} {}
proc bar {} {}
trace add command foo {rename delete} traceCommand
catch {rename foo bar}
set info
} {}
catch {rename foo {}}
catch {rename bar {}}
# Make sure it exists again
proc foo {} {}
test trace-20.1 {trace add command (delete option)} {
trace add command foo delete traceCommand
rename foo ""
set info
} {::foo {} delete}
test trace-20.2 {trace add command delete doesn't trace recreated commands} {
set info {}
proc foo {} {}
rename foo ""
set info
} {}
test trace-20.2.1 {trace add command delete trace info} {
proc foo {} {}
trace add command foo delete traceCommand
trace info command foo
} {{delete traceCommand}}
test trace-20.3 {trace add command implicit delete} {
proc foo {} {}
trace add command foo delete traceCommand
proc foo {} {}
set info
} {::foo {} delete}
test trace-20.3.1 {trace add command delete trace info} {
proc foo {} {}
trace info command foo
} {}
test trace-20.4 {trace add command rename followed by delete} {
set infotemp {}
proc foo {} {}
trace add command foo {rename delete} traceCommand
rename foo bar
lappend infotemp $info
rename bar {}
lappend infotemp $info
set info $infotemp
unset infotemp
set info
} {{foo bar rename} {::bar {} delete}}
catch {rename foo {}}
catch {rename bar {}}
test trace-20.5 {trace add command rename and delete} {
set infotemp {}
set info {}
proc foo {} {}
trace add command foo {rename delete} traceCommand
rename foo bar
lappend infotemp $info
rename bar {}
lappend infotemp $info
set info $infotemp
unset infotemp
set info
} {{foo bar rename} {::bar {} delete}}
test trace-20.6 {trace add command rename and delete in subinterp} {
set tc [interp create]
foreach p {traceCommand} {
$tc eval [list proc $p [info args $p] [info body $p]]
}
$tc eval [list set infotemp {}]
$tc eval [list set info {}]
$tc eval [list proc foo {} {}]
$tc eval [list trace add command foo {rename delete} traceCommand]
$tc eval [list rename foo bar]
$tc eval {lappend infotemp $info}
$tc eval [list rename bar {}]
$tc eval {lappend infotemp $info}
$tc eval {set info $infotemp}
$tc eval [list unset infotemp]
set info [$tc eval [list set info]]
interp delete $tc
set info
} {{foo bar rename} {::bar {} delete}}
# I'd like it if this test could give 'foo {} d' as a result,
# but interp deletion means there is no interp to evaluate
# the trace in.
test trace-20.7 {trace add command delete in subinterp while being deleted} {
set info {}
set tc [interp create]
interp alias $tc traceCommand {} traceCommand
$tc eval [list proc foo {} {}]
$tc eval [list trace add command foo {rename delete} traceCommand]
interp delete $tc
set info
} {}
proc traceDelete {cmd old new op} {
eval trace remove command $cmd [lindex [trace info command $cmd] 0]
global info
set info [list $old $new $op]
}
proc traceCmdrename {cmd old new op} {
rename $old someothername
}
proc traceCmddelete {cmd old new op} {
rename $old ""
}
test trace-20.8 {trace delete while trace is active} {
set info {}
proc foo {} {}
catch {rename bar {}}
trace add command foo {rename delete} [list traceDelete foo]
rename foo bar
list [set info] [trace info command bar]
} {{foo bar rename} {}}
test trace-20.9 {rename trace deletes command} {
set info {}
proc foo {} {}
catch {rename bar {}}
catch {rename someothername {}}
trace add command foo rename [list traceCmddelete foo]
rename foo bar
list [info commands foo] [info commands bar] [info commands someothername]
} {{} {} {}}
test trace-20.10 {rename trace renames command} {
set info {}
proc foo {} {}
catch {rename bar {}}
catch {rename someothername {}}
trace add command foo rename [list traceCmdrename foo]
rename foo bar
set info [list [info commands foo] [info commands bar] [info commands someothername]]
rename someothername {}
set info
} {{} {} someothername}
test trace-20.11 {delete trace deletes command} {
set info {}
proc foo {} {}
catch {rename bar {}}
catch {rename someothername {}}
trace add command foo delete [list traceCmddelete foo]
rename foo {}
list [info commands foo] [info commands bar] [info commands someothername]
} {{} {} {}}
test trace-20.12 {delete trace renames command} {
set info {}
proc foo {} {}
catch {rename bar {}}
catch {rename someothername {}}
trace add command foo delete [list traceCmdrename foo]
rename foo bar
rename bar {}
# None of these should exist.
list [info commands foo] [info commands bar] [info commands someothername]
} {{} {} {}}
proc foo {b} { set a $b }
# Delete arrays when done, so they can be re-used as scalars
# elsewhere.
catch {unset x}
catch {unset y}
# Delete procedures when done, so we don't clash with other tests
# (e.g. foobar will clash with 'unknown' tests).
catch {rename foobar {}}
catch {rename foo {}}
catch {rename bar {}}
proc foo {a} {
set b $a
}
proc traceExecute {args} {
global info
lappend info $args
}
test trace-21.1 {trace execution: enter} {
set info {}
trace add execution foo enter [list traceExecute foo]
foo 1
trace remove execution foo enter [list traceExecute foo]
set info
} {{foo {foo 1} enter}}
test trace-21.2 {trace exeuction: leave} {
set info {}
trace add execution foo leave [list traceExecute foo]
foo 2
trace remove execution foo leave [list traceExecute foo]
set info
} {{foo {foo 2} 0 2 leave}}
test trace-21.3 {trace exeuction: enter, leave} {
set info {}
trace add execution foo {enter leave} [list traceExecute foo]
foo 3
trace remove execution foo {enter leave} [list traceExecute foo]
set info
} {{foo {foo 3} enter} {foo {foo 3} 0 3 leave}}
test trace-21.4 {trace execution: enter, leave, enterstep} {
set info {}
trace add execution foo {enter leave enterstep} [list traceExecute foo]
foo 3
trace remove execution foo {enter leave enterstep} [list traceExecute foo]
set info
} {{foo {foo 3} enter} {foo {set b 3} enterstep} {foo {foo 3} 0 3 leave}}
test trace-21.5 {trace execution: enter, leave, enterstep, leavestep} {
set info {}
trace add execution foo {enter leave enterstep leavestep} [list traceExecute foo]
foo 3
trace remove execution foo {enter leave enterstep leavestep} [list traceExecute foo]
set info
} {{foo {foo 3} enter} {foo {set b 3} enterstep} {foo {set b 3} 0 3 leavestep} {foo {foo 3} 0 3 leave}}
test trace-21.6 {trace execution: enterstep, leavestep} {
set info {}
trace add execution foo {enterstep leavestep} [list traceExecute foo]
foo 3
trace remove execution foo {enterstep leavestep} [list traceExecute foo]
set info
} {{foo {set b 3} enterstep} {foo {set b 3} 0 3 leavestep}}
test trace-21.7 {trace execution: enterstep} {
set info {}
trace add execution foo {enterstep} [list traceExecute foo]
foo 3
trace remove execution foo {enterstep} [list traceExecute foo]
set info
} {{foo {set b 3} enterstep}}
test trace-21.8 {trace execution: leavestep} {
set info {}
trace add execution foo {leavestep} [list traceExecute foo]
foo 3
trace remove execution foo {leavestep} [list traceExecute foo]
set info
} {{foo {set b 3} 0 3 leavestep}}
proc factorial {n} {
if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }
return 1
}
test trace-22.1 {recursive(1) trace execution: enter} {
set info {}
trace add execution factorial {enter} [list traceExecute factorial]
factorial 1
trace remove execution factorial {enter} [list traceExecute factorial]
set info
} {{factorial {factorial 1} enter}}
test trace-22.2 {recursive(2) trace execution: enter} {
set info {}
trace add execution factorial {enter} [list traceExecute factorial]
factorial 2
trace remove execution factorial {enter} [list traceExecute factorial]
set info
} {{factorial {factorial 2} enter} {factorial {factorial 1} enter}}
test trace-22.3 {recursive(3) trace execution: enter} {
set info {}
trace add execution factorial {enter} [list traceExecute factorial]
factorial 3
trace remove execution factorial {enter} [list traceExecute factorial]
set info
} {{factorial {factorial 3} enter} {factorial {factorial 2} enter} {factorial {factorial 1} enter}}
test trace-23.1 {recursive(1) trace execution: enter, leave, enterstep, leavestep} {
set info {}
trace add execution factorial {enter leave enterstep leavestep} [list traceExecute]
factorial 1
trace remove execution factorial {enter leave enterstep leavestep} [list traceExecute]
join $info "\n"
} {{factorial 1} enter
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} enterstep
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} 0 {} leavestep
{return 1} enterstep
{return 1} 2 1 leavestep
{factorial 1} 0 1 leave}
test trace-23.2 {recursive(2) trace execution: enter, leave, enterstep, leavestep} {
set info {}
trace add execution factorial {enter leave enterstep leavestep} [list traceExecute]
factorial 2
trace remove execution factorial {enter leave enterstep leavestep} [list traceExecute]
join $info "\n"
} {{factorial 2} enter
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} enterstep
{expr {$n * [factorial [expr {$n -1 }]]}} enterstep
{expr {$n -1 }} enterstep
{expr {$n -1 }} 0 1 leavestep
{factorial 1} enterstep
{factorial 1} enter
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} enterstep
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} 0 {} leavestep
{return 1} enterstep
{return 1} 2 1 leavestep
{factorial 1} 0 1 leave
{factorial 1} 0 1 leavestep
{expr {$n * [factorial [expr {$n -1 }]]}} 0 2 leavestep
{return 2} enterstep
{return 2} 2 2 leavestep
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} 2 2 leavestep
{factorial 2} 0 2 leave}
test trace-23.3 {recursive(3) trace execution: enter, leave, enterstep, leavestep} {
set info {}
trace add execution factorial {enter leave enterstep leavestep} [list traceExecute]
factorial 3
trace remove execution factorial {enter leave enterstep leavestep} [list traceExecute]
join $info "\n"
} {{factorial 3} enter
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} enterstep
{expr {$n * [factorial [expr {$n -1 }]]}} enterstep
{expr {$n -1 }} enterstep
{expr {$n -1 }} 0 2 leavestep
{factorial 2} enterstep
{factorial 2} enter
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} enterstep
{expr {$n * [factorial [expr {$n -1 }]]}} enterstep
{expr {$n -1 }} enterstep
{expr {$n -1 }} 0 1 leavestep
{factorial 1} enterstep
{factorial 1} enter
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} enterstep
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} 0 {} leavestep
{return 1} enterstep
{return 1} 2 1 leavestep
{factorial 1} 0 1 leave
{factorial 1} 0 1 leavestep
{expr {$n * [factorial [expr {$n -1 }]]}} 0 2 leavestep
{return 2} enterstep
{return 2} 2 2 leavestep
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} 2 2 leavestep
{factorial 2} 0 2 leave
{factorial 2} 0 2 leavestep
{expr {$n * [factorial [expr {$n -1 }]]}} 0 6 leavestep
{return 6} enterstep
{return 6} 2 6 leavestep
{if {$n != 1} { return [expr {$n * [factorial [expr {$n -1 }]]}] }} 2 6 leavestep
{factorial 3} 0 6 leave}
proc traceDelete {cmd args} {
eval trace remove execution $cmd [lindex [trace info execution $cmd] 0]
global info
set info $args
}
test trace-24.1 {delete trace during enter trace} {
set info {}
trace add execution foo enter [list traceDelete foo]
foo 1
list $info [trace info execution foo]
} {{{foo 1} enter} {}}
test trace-24.2 {delete trace during leave trace} {
set info {}
trace add execution foo leave [list traceDelete foo]
foo 1
list $info [trace info execution foo]
} {{{foo 1} 0 1 leave} {}}
test trace-24.3 {delete trace during enter-leave trace} {
set info {}
trace add execution foo {enter leave} [list traceDelete foo]
foo 1
list $info [trace info execution foo]
} {{{foo 1} enter} {}}
test trace-24.4 {delete trace during all exec traces} {
set info {}
trace add execution foo {enter leave enterstep leavestep} [list traceDelete foo]
foo 1
list $info [trace info execution foo]
} {{{foo 1} enter} {}}
test trace-24.5 {delete trace during all exec traces except enter} {
set info {}
trace add execution foo {leave enterstep leavestep} [list traceDelete foo]
foo 1
list $info [trace info execution foo]
} {{{set b 1} enterstep} {}}
proc traceDelete {cmd args} {
rename $cmd {}
global info
set info $args
}
proc foo {a} {
set b $a
}
test trace-25.1 {delete command during enter trace} {
set info {}
trace add execution foo enter [list traceDelete foo]
catch {foo 1} err
list $err $info [trace info execution foo]
} {{invalid command name "foo"} {{foo 1} enter} {unknown command "foo"}}
proc foo {a} {
set b $a
}
test trace-25.2 {delete command during leave trace} {
set info {}
trace add execution foo leave [list traceDelete foo]
foo 1
list $info [trace info execution foo]
} {{{foo 1} 0 1 leave} {unknown command "foo"}}
proc foo {a} {
set b $a
}
test trace-25.3 {delete command during enter then leave trace} {
set info {}
trace add execution foo enter [list traceDelete foo]
trace add execution foo leave [list traceDelete foo]
catch {foo 1} err
list $err $info [trace info execution foo]
} {{invalid command name "foo"} {{foo 1} enter} {unknown command "foo"}}
proc foo {a} {
set b $a
}
proc traceExecute2 {args} {
global info
lappend info $args
}
# This shows the peculiar consequences of having two traces
# at the same time: as well as tracing the procedure you want
test trace-25.4 {order dependencies of two enter traces} {
set info {}
trace add execution foo enter [list traceExecute traceExecute]
trace add execution foo enter [list traceExecute2 traceExecute2]
catch {foo 1} err
trace remove execution foo enter [list traceExecute traceExecute]
trace remove execution foo enter [list traceExecute2 traceExecute2]
join [list $err [join $info \n] [trace info execution foo]] "\n"
} {1
traceExecute2 {foo 1} enter
traceExecute {foo 1} enter
}
test trace-25.5 {order dependencies of two step traces} {
set info {}
trace add execution foo enterstep [list traceExecute traceExecute]
trace add execution foo enterstep [list traceExecute2 traceExecute2]
catch {foo 1} err
trace remove execution foo enterstep [list traceExecute traceExecute]
trace remove execution foo enterstep [list traceExecute2 traceExecute2]
join [list $err [join $info \n] [trace info execution foo]] "\n"
} {1
traceExecute2 {set b 1} enterstep
traceExecute {set b 1} enterstep
}
# We don't want the result string (5th argument), or the results
# will get unmanageable.
proc tracePostExecute {args} {
global info
lappend info [concat [lrange $args 0 2] [lindex $args 4]]
}
proc tracePostExecute2 {args} {
global info
lappend info [concat [lrange $args 0 2] [lindex $args 4]]
}
test trace-25.6 {order dependencies of two leave traces} {
set info {}
trace add execution foo leave [list tracePostExecute tracePostExecute]
trace add execution foo leave [list tracePostExecute2 tracePostExecute2]
catch {foo 1} err
trace remove execution foo leave [list tracePostExecute tracePostExecute]
trace remove execution foo leave [list tracePostExecute2 tracePostExecute2]
join [list $err [join $info \n] [trace info execution foo]] "\n"
} {1
tracePostExecute {foo 1} 0 leave
tracePostExecute2 {foo 1} 0 leave
}
test trace-25.7 {order dependencies of two leavestep traces} {
set info {}
trace add execution foo leavestep [list tracePostExecute tracePostExecute]
trace add execution foo leavestep [list tracePostExecute2 tracePostExecute2]
catch {foo 1} err
trace remove execution foo leavestep [list tracePostExecute tracePostExecute]
trace remove execution foo leavestep [list tracePostExecute2 tracePostExecute2]
join [list $err [join $info \n] [trace info execution foo]] "\n"
} {1
tracePostExecute {set b 1} 0 leavestep
tracePostExecute2 {set b 1} 0 leavestep
}
proc foo {a} {
set b $a
}
proc traceDelete {cmd args} {
rename $cmd {}
global info
set info $args
}
test trace-25.8 {delete command during enter leave and enter/leave-step traces} {
set info {}
trace add execution foo enter [list traceDelete foo]
trace add execution foo leave [list traceDelete foo]
trace add execution foo enterstep [list traceDelete foo]
trace add execution foo leavestep [list traceDelete foo]
catch {foo 1} err
list $err $info [trace info execution foo]
} {{invalid command name "foo"} {{foo 1} enter} {unknown command "foo"}}
proc foo {a} {
set b $a
}
test trace-25.9 {delete command during enter leave and leavestep traces} {
set info {}
trace add execution foo enter [list traceDelete foo]
trace add execution foo leave [list traceDelete foo]
trace add execution foo leavestep [list traceDelete foo]
catch {foo 1} err
list $err $info [trace info execution foo]
} {{invalid command name "foo"} {{foo 1} enter} {unknown command "foo"}}
proc foo {a} {
set b $a
}
test trace-25.10 {delete command during leave and leavestep traces} {
set info {}
trace add execution foo leave [list traceDelete foo]
trace add execution foo leavestep [list traceDelete foo]
catch {foo 1} err
list $err $info [trace info execution foo]
} {1 {{set b 1} 0 1 leavestep} {unknown command "foo"}}
proc foo {a} {
set b $a
}
test trace-25.11 {delete command during enter and enterstep traces} {
set info {}
trace add execution foo enter [list traceDelete foo]
trace add execution foo enterstep [list traceDelete foo]
catch {foo 1} err
list $err $info [trace info execution foo]
} {{invalid command name "foo"} {{foo 1} enter} {unknown command "foo"}}
test trace-26.1 {trace targetCmd when invoked through an alias} {
proc foo {args} {
set b $args
}
set info {}
trace add execution foo enter [list traceExecute foo]
interp alias {} bar {} foo 1
bar 2
trace remove execution foo enter [list traceExecute foo]
set info
} {{foo {foo 1 2} enter}}
test trace-26.2 {trace targetCmd when invoked through an alias} {
proc foo {args} {
set b $args
}
set info {}
trace add execution foo enter [list traceExecute foo]
interp create child
interp alias child bar {} foo 1
child eval bar 2
interp delete child
trace remove execution foo enter [list traceExecute foo]
set info
} {{foo {foo 1 2} enter}}
test trace-27.1 {memory leak in rename trace (604609)} {
catch {rename bar {}}
proc foo {} {error foo}
trace add command foo rename {rename foo "" ;#}
rename foo bar
info commands foo
} {}
test trace-28.1 {enterstep and leavestep traces with update idletasks (615043)} {
catch {rename foo {}}
proc foo {} {
set a 1
update idletasks
set b 1
}
set info {}
trace add execution foo {enter enterstep leavestep leave} \
[list traceExecute foo]
update
after idle {puts idle}
foo
trace remove execution foo {enter enterstep leavestep leave} \
[list traceExecute foo]
rename foo {}
join $info "\n"
} {foo foo enter
foo {set a 1} enterstep
foo {set a 1} 0 1 leavestep
foo {update idletasks} enterstep
foo {puts idle} enterstep
foo {puts idle} 0 {} leavestep
foo {update idletasks} 0 {} leavestep
foo {set b 1} enterstep
foo {set b 1} 0 1 leavestep
foo foo 0 1 leave}
# Delete procedures when done, so we don't clash with other tests
# (e.g. foobar will clash with 'unknown' tests).
catch {rename foobar {}}
catch {rename foo {}}
catch {rename bar {}}
# Unset the varaible when done
catch {unset info}
# cleanup
::tcltest::cleanupTests
return