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|
set test "modules_out_of_tree"
set am_root [expr 0 == [exec id -u]]
# In this test, we verify support for out-of-tree kernel kernel modules.
# We do this by first compiling our very own kernel module and then
# listing and probing it.
# Create the temporary directory.
#
# Notice we're using a '-' in the directory name. This will help test
# the problem noted in PR19265 comment #1, where systemtap can't find
# out-of-tree modules when the directory has a '-' in the name.
if {[catch {exec mktemp -d -t staptest-XXXXXX} tmpdir]} {
verbose -log "Failed to create temporary directory: $tmpdir"
return
}
# Save the current directory and switch to our temporary directory.
set curdir [pwd]
cd ${tmpdir}
proc test_cleanup {} {
global curdir
global verbose
global tmpdir
# Restore current directory
cd ${curdir}
# Cleanup (if we're not verbose)
if { $verbose == 0 } { catch { exec rm -f ${tmpdir} } }
}
proc write_to_file {file data} {
global test
set data [string map "TEST $test" $data]
set file [open "$file" w]
puts $file $data
close $file
}
write_to_file "stap_$test.c" {
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
MODULE_LICENSE("GPL");
static int __init stap_TEST_init(void) {
return 0;
}
static void __exit stap_TEST_cleanup(void) {
return;
}
module_init(stap_TEST_init);
module_exit(stap_TEST_cleanup);
}
write_to_file "Makefile" {
obj-m := stap_TEST.o
default:
make -C /lib/modules/$(shell uname -r)/build M=$$PWD
}
set modname "stap_${test}.ko"
set modpath "${tmpdir}/${modname}"
set subtest "compilation"
if {[catch {exec make} err] || ![file exists ${modpath}]} {
fail "$test ($subtest)"
test_cleanup
return
}
pass "$test ($subtest)"
set pp "module(\"${modpath}\").function(\"stap_${test}_init\")"
set reg "^module\\\(\"${modpath}\"\\\)"
set reg "$reg\\\.function\\\(\"stap_${test}_init@${tmpdir}/stap_${test}.c:8\"\\\)$"
# Let's try listing a function first
set subtest "listing"
if {[catch {exec stap -l $pp} out] || ![regexp $reg $out]} {
fail "$test ($subtest)"
test_cleanup
return
}
pass "$test ($subtest)"
# OK now let's actually go for a run
set subtest "probing"
if {![installtest_p] || !$am_root || ![module_refresh_p]} {
untested "$test ($subtest)"
} else {
set script_template "probe %s { println(\"hit\") }"
set command "insmod ${modpath} && rmmod ${modpath}"
# Spawn stap
set failed 1
set script [format $script_template $pp]
spawn stap -e $script -c $command
expect {
-timeout 30
hit {
set failed 0
}
timeout {
verbose -log "$test timed out"
kill -INT -[exp_pid] 2
}
}
catch {close}; catch {wait}
if {$failed} {
fail "$test ($subtest)"
} else {
pass "$test ($subtest)"
}
}
# Now let's try the same thing, but with dwarfless-probing.
set subtest "dwarfless probing"
set pp "kprobe.module(\"${modpath}\").function(\"stap_${test}_init\")"
if {![installtest_p] || !$am_root || ![module_refresh_p]} {
untested "$test ($subtest)"
} else {
# Spawn stap
set failed 1
set script [format $script_template $pp]
spawn stap -e $script -c $command
expect {
-timeout 30
hit {
set failed 0
}
timeout {
verbose -log "$test timed out"
kill -INT -[exp_pid] 2
}
}
catch {close}; catch {wait}
if {$failed} {
fail "$test ($subtest)"
} else {
pass "$test ($subtest)"
}
}
# Now let's try with a relative path (instead of an absolute path).
set subtest "relative-path probing"
set pp "module(\"./${modname}\").function(\"stap_${test}_init\")"
if {![installtest_p] || !$am_root || ![module_refresh_p]} {
untested "$test ($subtest)"
} else {
# Spawn stap
set failed 1
set script [format $script_template $pp]
spawn stap -e $script -c $command
expect {
-timeout 30
hit {
set failed 0
}
timeout {
verbose -log "$test timed out"
kill -INT -[exp_pid] 2
}
}
catch {close}; catch {wait}
if {$failed} {
fail "$test ($subtest)"
} else {
pass "$test ($subtest)"
}
}
# Now let's try dwarfless probing with a relative path (instead of an
# absolute path).
set subtest "dwarfless relative-path probing"
set pp "kprobe.module(\"./${modname}\").function(\"stap_${test}_init\")"
if {![installtest_p] || !$am_root || ![module_refresh_p]} {
untested "$test ($subtest)"
} else {
# Spawn stap
set failed 1
set script [format $script_template $pp]
spawn stap -e $script -c $command
expect {
-timeout 30
hit {
set failed 0
}
timeout {
verbose -log "$test timed out"
kill -INT -[exp_pid] 2
}
}
catch {close}; catch {wait}
if {$failed} {
fail "$test ($subtest)"
} else {
pass "$test ($subtest)"
}
}
test_cleanup
|
