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|
set test "Server Argument Test"
# Each test will take 3 seconds or more due to the use of avahi to browse for
# servers, so limit iterations to some small but reasonable number.
set iterations 10
# Allow seeding the random number generator using an environment variable in
# order to facilitate reproducing a given series of tests. Otherwise seed it
# using the current time.
if [info exists env(STAP_RANDOM_SEED)] {
set random_seed $env(STAP_RANDOM_SEED)
} else {
set random_seed [clock seconds]
}
verbose -log "Random seed is $random_seed"
expr srand($random_seed)
proc stap_direct_and_with_client {stap stap_client options} {
# tcl's 'eval' creates a string containing the arguments and
# recursively passes it to the tcl interpreter. Special
# characters need to be quoted.
regsub -all "\[\"\\\\;\]" $options {\\\0} options
regsub -all "\[\n\]" $options {\\n} options
verbose -log "eval exec $stap $options"
catch {eval exec $stap $options} res_stap
verbose -log $res_stap
# Now run it against stap-client
verbose -log "eval exec $stap_client $options"
catch {eval exec $stap_client $options} res_stap_client
verbose -log $res_stap_client
# Now check the output
set n 0
set expected [split $res_stap "\n"]
set received [split $res_stap_client "\n"]
foreach line $received {
set expected_line [lindex $expected $n]
# Some messages contain the names of files or directories
# and will be prefixed for the client.
if {[regexp "^ (.*)" $expected_line match data]} {
# Special characters in the regexp need to be quoted.
regsub -all "\[\"\\\\;\*\]" $data {\\\0} data
if {[regexp "^ tapsets.*/$data" $line]} {
incr n
continue
}
if {[regexp "^ runtime.*/$data" $line]} {
incr n
continue
}
# Some messages contain the name of the module based on the
# process id.
if {[regexp "^ stap_\[0-9\]*" $expected_line] &&
[regexp "^ stap_\[0-9\]*" $line]} {
incr n
continue
}
} elseif {[regexp "^Input file '(.*)' is empty or missing." $expected_line match data]} {
# Special characters in the regexp need to be quoted.
regsub -all "\[\"\\\\;\*\]" $data {\\\0} data
if {[regexp "^Input file 'script.*/$data' is empty or missing." $line]} {
incr n
continue
}
} elseif {[regexp "^(.*/stap): (.*)" $line match data1 data2]} {
# Special characters in the regexp need to be quoted.
regsub -all "\[\"\\\\;\*\]" $data2 {\\\0} data2
if {[regexp "^$stap: $data2" $expected_line]} {
incr n
continue
}
}
# Otherwise the output must be identical.
if {! [string equal $line $expected_line]} {
break
}
incr n
}
if {$n == [llength $expected] && [llength $expected] == [llength $received]} {
# Test passes
return 1
}
# Test fails
send_log "line [expr $n + 1]:\n"
send_log "Expected: \"[lindex $expected $n]\"\n"
send_log "Got : \"$line\"\n"
return 0
}
# ************ Start of mainline *************
# Don't attempt these tests if the client/server are not available
# Start a systemtap server, if one is not already started.
if {! [use_server_p]} then {
if {! [setup_server]} then {
untested "$test"
return
}
}
# Make sure we call the correct instances of stap and stap-client.
# There is a copy of 'stap-client' on the PATH as 'stap'.
if {[installtest_p]} then {
# For 'make installcheck', use both from the location of the actual
# stap-client on the PATH.
set stap_client [exec which stap-client]
set stap [exec dirname $stap_client]/stap
} else {
# For 'make check' use stap-client from the source tree and use stap from
# the build tree.
set stap_client $srcdir/../stap-client
set stap [exec pwd]/../stap
}
# Test some argument strings which have failed in the past. This is useful
# for debugging a currently failing case and helps to ensure that previously
# fixed cases do not regress.
set previously_fixed [list \
"-p1 -I=\\w94\nbh -e -Dhfuo0iu7 -c" \
"-p1 -I8o\\2ie -e'1\\ -D\n\" -c" \
"-p1 -Ira\\3;c g -e0fle'qq -Dr/316k\\o8 -cjyoc\n3" \
"-p1 -I6p3 -elc -Dqgsgv' -c" \
"-p1 -I\"vyv;z -ej\"/3 -D/ 01qck\n -c3u55zut" \
"-p1 -I1 -eo9e\nx047q -D9xyefk0a -cvl98/x1'i" \
"-p1 -c; test.stp" \
"-p1 -I4hgy96 -e5oo39p -Ddx8v -c4;" \
"-p1 -I -esq3wors -Dz -c*eibz8h2e" \
"-p1 -I a -em339db5 -Du2;c0ps -ch9o\\" \
"-p1 -Ipfjps4 -ebug4dc -Du8vd fvkl -c" \
"-p1 -I0\"nspzjyf -e5r3up8h -Dmi;ojp9m -cx;a2fat" \
"-p1 -Iu -ek7;r -Dcu\"; -c\"hc" \
"-p1 -Icd4fidq m40mv -edn -D;8ha\\cjr -c1*vnq" \
"-p1 -I;3 -er8e -D -cb6k29z" \
"-p1 -Ircj -e -D -c\\vmww" \
"-p1 -Illc5 -e65wof9 qr*=x7x5 -D -cgx;" \
"-p1 -Iyaj420=3 -e\" -D -cd'5mi" \
"-p1 -Ir -e -D29\\ -cj2szt;4" \
"-p1 -Ibno3=b4sk -e' -Dg2-j;e -c2ijx'" \
"-p1 -I285v7pl -eo5\\0 -D86s -c-c*v" \
]
set i 0
foreach options $previously_fixed {
if {[stap_direct_and_with_client $stap $stap_client $options]} {
pass "$test $i"
} else {
fail "$test $i"
}
incr i
}
# Generate semi-random arguments containing with potential problem characters.
# Check that running systemtap with the client/server generates output
# comparable to running stap directly.
set dangerous_options [list "-I" "-e" "-D" "-c" "-S"]
# NB: Other options could be candidates here, like -r and -B, but
# there stap-server imposes more restrictions than local stap, so
# this simple error-matching test cannot use them.
set argchars "0123456789/;*'=-\\\"\n abcdefghijklmnopqrstuvwxyz"
for {set i 0} {$i < $iterations} {incr i} {
verbose -log "Iteration $i"
# First generate an argument string
set options "-p1"
foreach option $dangerous_options {
set options "$options $option"
set limit [expr int(rand() * 10)]
for {set c 0} {$c < $limit} {incr c} {
set options "$options[string index $argchars [expr int(rand() * [string length $argchars])]]"
}
}
# Now test it against stap and stap-client
if {[stap_direct_and_with_client $stap $stap_client $options]} {
pass "Fuzzing $test $i"
} else {
fail "Fuzzing $test $i"
}
}
# Shudown the server, if we started it.
if {! [use_server_p]} then {
shutdown_server
}
|
