1# See the file LICENSE for redistribution information. 2# 3# Copyright (c) 2000,2008 Oracle. All rights reserved. 4# 5# $Id: wrap.tcl,v 12.8 2008/01/08 20:58:53 bostic Exp $ 6# 7# Sentinel file wrapper for multi-process tests. This is designed to avoid a 8# set of nasty bugs, primarily on Windows, where pid reuse causes watch_procs 9# to sit around waiting for some random process that's not DB's and is not 10# exiting. 11 12source ./include.tcl 13source $test_path/testutils.tcl 14 15# Arguments: 16if { $argc < 3 } { 17 puts "FAIL: wrap.tcl: Usage: wrap.tcl script log scriptargs" 18 exit 19} 20 21set script [lindex $argv 0] 22set logfile [lindex $argv 1] 23set skip [lindex $argv 2] 24set args [lrange $argv 3 end] 25# 26# Account in args for SKIP command, or not. 27# 28if { $skip != "SKIP" } { 29 set args [lrange $argv 2 end] 30} 31 32# Create a sentinel file to mark our creation and signal that watch_procs 33# should look for us. 34set parentpid [pid] 35set parentsentinel $testdir/begin.$parentpid 36set f [open $parentsentinel w] 37close $f 38 39# Create a Tcl subprocess that will actually run the test. 40set t [open "|$tclsh_path >& $logfile" w] 41 42# Create a sentinel for the subprocess. 43set childpid [pid $t] 44puts "Script watcher process $parentpid launching $script process $childpid." 45set childsentinel $testdir/begin.$childpid 46set f [open $childsentinel w] 47close $f 48 49# 50# For the upgrade tests where a current release tclsh is starting up 51# a tclsh in an older release, we cannot tell it to source the current 52# test.tcl because new things may not exist in the old release. So, 53# we need to skip that and the script we're running in the old 54# release will have to take care of itself. 55# 56if { $skip != "SKIP" } { 57 puts $t "source $test_path/test.tcl" 58} 59puts $t "set script $script" 60 61# Set up argv for the subprocess, since the args aren't passed in as true 62# arguments thanks to the pipe structure. 63puts $t "set argc [llength $args]" 64puts $t "set argv [list $args]" 65 66set scr $test_path/$script 67puts $t "set scr $scr" 68puts $t {set ret [catch { source $scr } result]} 69puts $t {if { [string length $result] > 0 } { puts $result }} 70puts $t {error_check_good "$scr run: $result: pid [pid]" $ret 0} 71 72# Close the pipe. This will flush the above commands and actually run the 73# test, and will also return an error a la exec if anything bad happens 74# to the subprocess. The magic here is that closing a pipe blocks 75# and waits for the exit of processes in the pipeline, at least according 76# to Ousterhout (p. 115). 77 78set ret [catch {close $t} res] 79 80# Write ending sentinel files--we're done. 81set f [open $testdir/end.$childpid w] 82close $f 83set f [open $testdir/end.$parentpid w] 84close $f 85 86error_check_good "Pipe close ($childpid: $script $argv: logfile $logfile)"\ 87 $ret 0 88exit $ret 89