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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_sopath "[pwd]/labels.so"
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"
}
# label in an executable
verbose -log "spawn stap -c $label_exepath $label_stppath"
spawn stap -c $label_exepath $label_stppath
wait
expect {
-timeout 180
-re {VARS a=0x0 b=0x0.*VARS a=0x2 b=0x0.*VARS a=0x2 b=0x3 c=0x[a-f01-9]} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
if {$ok == 1} { pass "$test exe .label" } { fail "$test exe .label" }
# address of label in an executable
set label_shpath "[pwd]/label.sh"
set fp [open $label_shpath "w"]
puts $fp "
readelf --debug-dump $label_exepath | awk \"
/init_another_int/ {have_label=1}
/DW_AT_low_pc/ {if (have_label) {print \$3;exit;}}
\"
"
close $fp
spawn sh $label_shpath
expect {
-re {0x[0-9a-f]*}
}
set ok 0
spawn stap -p2 -l "process\(\"$label_exepath\"\).statement($expect_out(0,string))"
expect {
-timeout 180
-re {no match} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
if {$ok == 0} { pass "$test exe .statement" } { xfail "$test exe .statement" }
set ok 0
set label_flags "additional_flags=-g additional_flags=-shared additional_flags=-fPIC"
set res [target_compile $label_srcpath $label_sopath 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"
}
# label in a shared object
spawn stap -p2 -l "process\(\"$label_sopath\"\).function\(\"\*\"\).label\(\"init_another_int\"\)"
expect {
-timeout 180
-re {process.*function} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
if {$ok == 1} { pass "$test so .label" } { fail "$test so .label" }
# address of label in a shared object
set label_shpath "[pwd]/label.sh"
set fp [open $label_shpath "w"]
puts $fp "
readelf --debug-dump $label_sopath | awk \"
/init_another_int/ {have_label=1}
/DW_AT_low_pc/ {if (have_label) {print \$3;exit;}}
\"
"
close $fp
spawn sh $label_shpath
expect {
-re {0x[0-9a-f]*}
}
set ok 0
spawn stap -p2 -l "process\(\"$label_sopath\"\).statement($expect_out(0,string))"
expect {
-timeout 180
-re {no match} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
if {$ok == 0} { pass "$test so .statement" } { xfail "$test so .statement" }
# catch {exec rm -f $label_srcpath $label_stppath $label_exepath}
|
