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|
set test "labels"
if {![installtest_p]} {untested $test; return}
if {![utrace_p]} { 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 "#include <unistd.h>
int
foo ()
{
init_an_int:
return 1;
}
int
main ()
{
sleep(5);
foo();
int a = 0;
int b = 0;
char *c;
init_an_int:
a = 2;
init_an_int_again:
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)}
probe process(\"labels.x\").function(\"main@labels.c\").label(\"init_an_int\") {printf (\"init_an_int\\n\")}
probe process(\"labels.x\").function(\"*\").label(\"*\") {printf (\"label=%s\\n\", pnlabel())}
"
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 $label_flags"
catch {exec rm -f $label_srcpath $label_stppath}
return
} else {
pass "compiling labels.c $label_flags"
}
# line number error (expect no output at all, since no label found)
set ok 0
spawn stap --use-server-on-error=no -l "process(\"$label_exepath\").function(\"foo@${label_srcpath}:10\").label(\"*\")"
expect {
-timeout 180
-re {[^\r\n]+} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok == 0} { pass "$test :N .label $ok" } { fail "$test :N .label $ok" }
# line number
set ok 0
spawn stap -l "process(\"$label_exepath\").function(\"foo@${label_srcpath}:5\").label(\"*\")"
expect {
-timeout 180
-re {process.*function.*labels.c:5...label..init_an_int} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok == 1} { pass "$test :N .label $ok" } { fail "$test :N .label $ok" }
# list of labels
spawn stap -l "process(\"$label_exepath\").function(\"*\").label(\"*\")"
set ok 0
expect {
-timeout 180
-re {^process[^\r\n]*function[^\r\n]*labels.c:5...label..init_an_int..\r\n}
{ incr ok; exp_continue }
-re {^process[^\r\n]*function[^\r\n]*labels.c:16...label..init_an_int..\r\n}
{ incr ok; exp_continue }
-re {^process[^\r\n]*function[^\r\n]*labels.c:18...label..init_an_int_again..\r\n}
{ incr ok; exp_continue }
-re {^process[^\r\n]*function[^\r\n]*labels.c:21...label..ptr_inited..\r\n}
{ incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok == 4} { pass "$test -l .label" } { fail "$test -l .label $ok" }
# label in an executable (only if we have uprobes)
foreach runtime [get_runtime_list] {
set test_name "$test exe .label"
if {$runtime != ""} {
lappend test_name $runtime
verbose -log "spawn stap -c $label_exepath $label_stppath --runtime=$runtime"
spawn stap -w -c $label_exepath $label_stppath --runtime=$runtime
} elseif {[uprobes_p]} {
verbose -log "spawn stap -c $label_exepath $label_stppath"
spawn stap -w -c $label_exepath $label_stppath
} else {
untested "$test_name"
continue
}
# Note that the output can come out in a bit different order
# depending on when the probes fire. This is reasonable since
# we've got 2 probes at the same probe point (.label("init_*") and
# .label("init_an_int"))
set ok 0
expect {
-timeout 180
-re {^init_an_int\r\n} { incr ok; exp_continue }
-re {^VARS a=0x0 b=0x0 c=0x[0-9a-f]+\r\n} { incr ok; exp_continue }
-re {^VARS a=0x2 b=0x0 c=0x[0-9a-f]+\r\n} { incr ok; exp_continue }
-re {^VARS a=0x2 b=0x3 c=0x[0-9a-f]+\r\n} { incr ok; exp_continue }
-re {^label=init_an_int\r\n} { incr ok; exp_continue }
-re {^label=init_an_int_again\r\n} { incr ok; exp_continue }
-re {^label=ptr_inited\r\n} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok == 8} { pass "$test_name" } { fail "$test_name $ok" }
}
# 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_an_int_again/ {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]*}
}
catch { close }; catch { wait }
set ok 0
spawn stap -l "process\(\"$label_exepath\"\).statement($expect_out(0,string))"
expect {
-timeout 180
-re {process.*statement} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok > 0} { pass "$test exe .statement" } { fail "$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 $label_flags"
catch {exec rm -f $label_srcpath $label_stppath}
return
} else {
pass "compiling labels.c $label_flags"
}
# label in a shared object
spawn stap -l "process\(\"$label_sopath\"\).function\(\"\*\"\).label\(\"init_an_int_again\"\)"
expect {
-timeout 180
-re {process.*function} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok == 1} { pass "$test so .label" } { fail "$test so .label $ok" }
# 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_an_int_again/ {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]*}
}
catch { close }; catch { wait }
set ok 0
spawn stap -l "process\(\"$label_sopath\"\).statement($expect_out(0,string))"
expect {
-timeout 180
-re {process.*statement} { incr ok; exp_continue }
timeout { fail "$test (timeout)" }
eof { }
}
catch { close }; catch { wait }
if {$ok > 0} { pass "$test so .statement" } { fail "$test so .statement" }
catch {exec rm -f $label_srcpath $label_stppath $label_exepath $label_shpath $label_sopath}
|
