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set test "labels"
if {![installtest_p]} {untested $test; return}
# Try to find utrace_attach symbol in /proc/kallsyms
# copy from utrace_p5.exp
set utrace_support_found 0
set path "/proc/kallsyms"
if {! [catch {exec grep -q utrace_attach $path} dummy]} {
set utrace_support_found 1
}
if {$utrace_support_found == 0} { untested "$test"; return }
# Compile a C program to use as the user-space probing target
set label_srcpath "[pwd]/labels.c"
set label_exepath "[pwd]/labels.x"
set label_flags "additional_flags=-g"
set fp [open $label_srcpath "w"]
puts $fp "
int
main ()
{
sleep(5);
int a = 0;
int b = 0;
char *c;
init_an_int:
a = 2;
init_another_int:
b = 3;
c = \"abc\";
ptr_inited:
return 1;
}
"
close $fp
set label_stppath "[pwd]/labels.stp"
set fp [open $label_stppath "w"]
puts $fp "
probe process(\"labels.x\").function(\"main*@labels.c\").label(\"init_*\") {printf (\"VARS %s\\n\",\$\$vars)}
probe process(\"labels.x\").function(\"main*@labels.c\").label(\"ptr_inited\") {printf (\"VARS %s\\n\",\$\$vars)}
"
close $fp
set ok 0
set res [target_compile $label_srcpath $label_exepath executable $label_flags]
if { $res != "" } {
verbose "target_compile failed: $res" 2
fail "compiling labels.c -g"
catch {exec rm -f $label_srcpath $label_stppath}
return
} else {
pass "compiling labels.c -g"
}
verbose -log "spawn stap -c $label_exepath $label_stppath"
spawn stap -c $label_exepath $label_stppath
expect {
-timeout 180
-re {VARS a=0x0 b=0x0.*VARS a=0x2 b=0x0.*VARS a=0x2 b=0x3 c=0x[a-f01-9]} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
wait
if {$ok == 1} { pass "$test" } { fail "$test ($ok)" }
catch {exec rm -f $label_srcpath $label_stppath $label_exepath}
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