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# Tests that the stack size is big enough for the application.
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#
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# This file contains a collection of tests for one or more of the Tcl
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# built-in commands. Sourcing this file into Tcl runs the tests and
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# generates output for errors. No output means no errors were found.
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#
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# Copyright (c) 1998-2000 Ajuba Solutions.
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# Portions Copyright (c) 2007 Nokia Corporation and/or its subsidiaries. All rights reserved.
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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# RCS: @(#) $Id: stack.test,v 1.15.2.1 2004/05/03 18:01:36 kennykb Exp $
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if {[lsearch [namespace children] ::tcltest] == -1} {
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package require tcltest 2
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namespace import -force ::tcltest::*
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}
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# Note that a failure in this test results in a crash of the executable.
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# In order to avoid that, we do a basic check of the current stacksize.
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# This size can be changed with ulimit (ksh/bash/sh) or limit (csh/tcsh).
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# This doesn't catch all cases, for example threads of lower stacksize
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# can still squeak through. A core check is really needed. -- JH
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if {[string equal $::tcl_platform(platform) "unix"]} {
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if {[string equal $tcl_platform(osSystemName) "Symbian"]} {
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# cannot dynamically set stack size in Symbian, and max stack size is 80K in Symbian
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set stackSize 80
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} else {
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set stackSize [exec /bin/sh -c "ulimit -s"]
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}
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if {[string is integer $stackSize] && ($stackSize < 2400)} {
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puts stderr "WARNING: the default application stacksize of $stackSize\
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may cause Tcl to\ncrash due to stack overflow before the\
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recursion limit is reached.\nA minimum stacksize of 2400\
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kbytes is recommended.\nSkipping infinite recursion test."
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::tcltest::testConstraint minStack2400 0
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} else {
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::tcltest::testConstraint minStack2400 1
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}
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} else {
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::tcltest::testConstraint minStack2400 1
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}
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test stack-1.1 {maxNestingDepth reached on infinite recursion} {minStack2400} {
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proc recurse {} { return [recurse] }
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catch {recurse} rv
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rename recurse {}
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set rv
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} {too many nested evaluations (infinite loop?)}
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test stack-2.1 {maxNestingDepth reached on infinite recursion} {minStack2400} {
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# do this in a slave to not mess with parent
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set slave stack-2.1
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interp create $slave
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$slave eval { interp alias {} unknown {} notaknownproc }
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set msg [$slave eval { catch {foo} msg ; set msg }]
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interp delete $slave
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set msg
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} {too many nested evaluations (infinite loop?)}
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# Make sure that there is enough stack to run regexp even if we're
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# close to the recursion limit. [Bug 947070]
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test stack-3.1 {enough room for regexp near recursion limit} \
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-constraints { win } \
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-setup {
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set ::limit [interp recursionlimit {} 10000]
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set ::depth 0
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proc a { max } {
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if { [info level] < $max } {
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set ::depth [info level]
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a $max
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} else {
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regexp {^ ?} x
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}
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}
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list [catch { a 10001 }]
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incr depth -3
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set depth2 $depth
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} -body {
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list [catch { a $::depth } result] \
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$result [expr { $::depth2 - $::depth }]
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} -cleanup {
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interp recursionlimit {} $::limit
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} -result {0 1 1}
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# cleanup
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::tcltest::cleanupTests
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return
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# Local Variables:
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# mode: tcl
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# End:
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