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|
# itrace test
# Initialize variables
set exepath "[pwd]/ls_[pid]"
# Why check for 1000 instructions executed? We can't know the actual
# number to look for, so we just look for a reasonable number that
# should work for all platforms.
set itrace_single1_script {
global instrs = 0
probe begin { printf("systemtap starting probe\n") }
probe process("%s").insn
{
instrs += 1
}
probe end {
printf("systemtap ending probe\n")
if (instrs > 1000) {
printf("instrs > 1000 (%%d)\n", instrs)
}
else {
printf("instrs <= 1000 (%%d)\n", instrs)
}
}
}
set itrace_single1_script_output "instrs > 1000 \\(\[0-9\]\[0-9\]*\\)\r\n"
set itrace_single2_script {
global instrs = 0, itrace_on = 0, start_timer = 0
probe begin { start_timer = 1; printf("systemtap starting probe\n") }
probe process("%s").insn if (itrace_on)
{
instrs += 1
if (instrs == 5)
exit()
}
probe timer.ms(1) if (start_timer)
{
itrace_on = 1
}
probe timer.ms(10) if (start_timer)
{
itrace_on = 0
}
probe end { printf("systemtap ending probe\n")
printf("itraced = %%d\n", instrs)
}
}
set itrace_single2_script_output "itraced = 5\r\n"
set itrace_block1_script {
global branches = 0
probe begin
{
printf("systemtap starting probe\n")
}
probe process("%s").insn.block
{
branches += 1
if (branches == 5)
exit()
}
probe end { printf("systemtap ending probe\n")
printf("itraced block mode = %%d\n", branches)
}
}
set itrace_block1_script_output "itraced block mode = 5\r\n"
set itrace_block2_script {
global instrs = 0, itrace_on = 0, start_timer = 0
probe begin { start_timer = 1; printf("systemtap starting probe\n") }
probe process("%s").insn.block if (itrace_on)
{
instrs += 1
if (instrs == 5)
exit()
}
probe timer.ms(1) if (start_timer)
{
itrace_on = 1
}
probe timer.ms(10) if (start_timer)
{
itrace_on = 0
}
probe end { printf("systemtap ending probe\n")
printf("itraced = %%d\n", instrs)
}
}
set itrace_block2_script_output "itraced = 5\r\n"
set itrace_single_step_script {
%{
#include "ptrace_compatibility.h"
%}
function has_single_step() %{
THIS->__retvalue = arch_has_single_step(); /* pure */
%}
probe begin {
printf("has_single_step: %d\n", has_single_step())
exit()
}
}
set itrace_block_step_script {
%{
#include "ptrace_compatibility.h"
%}
function has_block_step() %{
THIS->__retvalue = arch_has_block_step(); /* pure */
%}
probe begin {
printf("has_block_step: %d\n", has_block_step())
exit()
}
}
proc stap_check_feature { test_name script feature } {
set rc -1
verbose -log "stap -g -e \"$script\""
spawn stap -g -e "$script"
expect {
-timeout 60
-re "^$feature: 0" { set rc 0; pass $test_name }
-re "^$feature: 1" { set rc 1; pass $test_name }
eof { fail "$test_name (eof)" }
timeout { fail "$test_name (timeout)" }
}
catch {close}
catch {wait}
return $rc
}
# Set up our own copy of /bin/ls, to make testing for a particular
# executable easy. We can't use 'ln' here, since we might be creating
# a cross-device link. We can't use 'ln -s' here, since the kernel
# resolves the symbolic link and reports that /bin/ls is being
# exec'ed (instead of our local copy).
if {[catch {exec cp /bin/ls $exepath} res]} {
fail "unable to copy /bin/ls: $res"
return
}
# "load" generation function for stap_run. It spawns our own copy of
# /bin/ls, waits 1 second, then kills it.
proc run_ls_1_sec {} {
global exepath
spawn $exepath
set exe_id $spawn_id
after 1000;
exec kill -INT -[exp_pid -i $exe_id]
return 0;
}
# figure out if this system supports single stepping (if we've got
# utrace and we're doing install testing)
set TEST_NAME "itrace single step check"
set single_step_p 0
if {![utrace_p]} {
untested "$TEST_NAME : no kernel utrace support found"
} elseif {![installtest_p]} {
untested $TEST_NAME
} else {
set single_step_p [stap_check_feature $TEST_NAME \
$itrace_single_step_script "has_single_step"]
}
# figure out if this system supports block stepping (if we've got
# utrace and we're doing install testing)
set TEST_NAME "itrace block step check"
set block_step_p 0
if {![utrace_p]} {
untested "$TEST_NAME : no kernel utrace support found"
} elseif {![installtest_p]} {
untested $TEST_NAME
} else {
set block_step_p [stap_check_feature $TEST_NAME \
$itrace_block_step_script "has_block_step"]
}
# Run the single step tests
set TEST_NAME "itrace_single1"
if {![utrace_p]} {
untested "$TEST_NAME : no kernel utrace support found"
} elseif {![installtest_p]} {
untested $TEST_NAME
} elseif {$single_step_p != 1} {
xfail "$TEST_NAME : no kernel single step support"
} else {
set script [format $itrace_single1_script $exepath]
stap_run $TEST_NAME run_ls_1_sec $itrace_single1_script_output -e $script
}
set TEST_NAME "itrace_single2"
if {![utrace_p]} {
untested "$TEST_NAME : no kernel utrace support found"
} elseif {![installtest_p]} {
untested $TEST_NAME
} elseif {$single_step_p != 1} {
xfail "$TEST_NAME : no kernel single step support"
} else {
set script [format $itrace_single2_script $exepath]
stap_run $TEST_NAME run_ls_1_sec $itrace_single2_script_output -e $script
}
# Run the block step tests
set TEST_NAME "itrace_block1"
if {![utrace_p]} {
untested "$TEST_NAME : no kernel utrace support found"
} elseif {![installtest_p]} {
untested $TEST_NAME
} elseif {$block_step_p != 1} {
xfail "$TEST_NAME : no kernel block step support"
} else {
set script [format $itrace_block1_script $exepath]
stap_run $TEST_NAME run_ls_1_sec $itrace_block1_script_output -e $script
}
set TEST_NAME "itrace_block2"
if {![utrace_p]} {
untested "$TEST_NAME : no kernel utrace support found"
} elseif {![installtest_p]} {
untested $TEST_NAME
} elseif {$block_step_p != 1} {
xfail "$TEST_NAME : no kernel block step support"
} else {
set script [format $itrace_block2_script $exepath]
stap_run $TEST_NAME run_ls_1_sec $itrace_block2_script_output -e $script
}
# Cleanup
exec rm -f $exepath
|
