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# Tests that the stack size is big enough for the application.
#
# 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) 1998-2000 Ajuba Solutions.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: stack.test,v 1.17 2004/06/22 19:41:25 kennykb Exp $
if {[lsearch [namespace children] ::tcltest] == -1} {
package require tcltest 2
namespace import -force ::tcltest::*
}
# Note that a failure in this test results in a crash of the executable.
# In order to avoid that, we do a basic check of the current stacksize.
# This size can be changed with ulimit (ksh/bash/sh) or limit (csh/tcsh).
# This doesn't catch all cases, for example threads of lower stacksize
# can still squeak through. A core check is really needed. -- JH
if {[string equal $::tcl_platform(platform) "unix"]} {
set stackSize [exec /bin/sh -c "ulimit -s"]
if {[string is integer $stackSize] && ($stackSize < 2400)} {
puts stderr "WARNING: the default application stacksize of $stackSize\
may cause Tcl to\ncrash due to stack overflow before the\
recursion limit is reached.\nA minimum stacksize of 2400\
kbytes is recommended.\nSkipping infinite recursion test."
::tcltest::testConstraint minStack2400 0
} else {
::tcltest::testConstraint minStack2400 1
}
} else {
::tcltest::testConstraint minStack2400 1
}
test stack-1.1 {maxNestingDepth reached on infinite recursion} {minStack2400} {
proc recurse {} { return [recurse] }
catch {recurse} rv
rename recurse {}
set rv
} {too many nested evaluations (infinite loop?)}
test stack-2.1 {maxNestingDepth reached on infinite recursion} {minStack2400} {
# do this in a slave to not mess with parent
set slave stack-2.1
interp create $slave
$slave eval { interp alias {} unknown {} notaknownproc }
set msg [$slave eval { catch {foo} msg ; set msg }]
interp delete $slave
set msg
} {too many nested evaluations (infinite loop?)}
# Make sure that there is enough stack to run regexp even if we're
# close to the recursion limit. [Bug 947070]
test stack-3.1 {enough room for regexp near recursion limit} \
-constraints { win } \
-setup {
set ::limit [interp recursionlimit {} 10000]
proc a { max } {
if { [info level] < $max } {
set ::depth [info level]
a $max
} else {
regexp {^ ?} x
}
}
} -body {
set ::depth 0
catch { a 10001 }
set depth2 $depth
catch { a $::depth }
expr { $depth2 - $depth }
} -cleanup {
interp recursionlimit {} $::limit
rename a {}
} -result {1}
# cleanup
::tcltest::cleanupTests
return
# Local Variables:
# mode: tcl
# End:
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