[PATCH] test: add -l and -lv tests for stapsdt probes

[PATCH] test: add -l and -lv tests for stapsdt probes

[Kris Van Hees]

The stapsdt support in DTrace provides limited support for argument data
for probes.  The number of arguments passed to a probe and their native
type (signed or unsigned int of size 1, 2, 4, or 8 bytes) is discoverable.

Signed-off-by: Kris Van Hees
<kris.van.hees@oracle.com>
---
 test/unittest/usdt/tst.stapsdt-notes-l.sh  | 46 ++++++++++++++++++++++
 test/unittest/usdt/tst.stapsdt-notes-lv.sh | 46 ++++++++++++++++++++++
 2 files changed, 92 insertions(+)
 create mode 100755 test/unittest/usdt/tst.stapsdt-notes-l.sh
 create mode 100755 test/unittest/usdt/tst.stapsdt-notes-lv.sh

diff --git a/test/unittest/usdt/tst.stapsdt-notes-l.sh b/test/unittest/usdt/tst.stapsdt-notes-l.sh
new file mode 100755
index 000000000..663ba07b1
--- /dev/null
+++ b/test/unittest/usdt/tst.stapsdt-notes-l.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+#
+# Oracle Linux DTrace.
+# Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+# Licensed under the Universal Permissive License v 1.0 as shown at
+# http://oss.oracle.com/licenses/upl.
+
+# This test covers stapsdt probes fired by the STAP_PROBEn macros,
+# testing listing probes.
+
+if [ $# != 1 ]; then
+	echo expected one argument: '<'dtrace-path'>'
+	exit 2
+fi
+
+dtrace=$1
+CC=/usr/bin/gcc
+CFLAGS="-I${PWD}/test/unittest/usdt"
+
+DIRNAME="$tmpdir/usdt-notes.$$.$RANDOM"
+mkdir -p $DIRNAME
+cd $DIRNAME
+
+cat > test.c <<EOF
+#include <sdt_notes.h>
+
+int
+main(int argc, char **argv)
+{
+	STAP_PROBE(test_prov, zero);
+	STAP_PROBE1(test_prov, one, argc);
+	STAP_PROBE2(test_prov, two, 2, 3);
+	STAP_PROBE4(test_prov, args, argc, argv[0], argv[1] + 4, 18);
+}
+EOF
+
+${CC} ${CFLAGS} -o test test.c
+if [ $? -ne 0 ]; then
+	echo "failed to compile test.c" >& 2
+	exit 1
+fi
+
+$dtrace -c './test arg1val' -lP test_prov\$target
+status=$?
+
+exit $status
diff --git a/test/unittest/usdt/tst.stapsdt-notes-lv.sh b/test/unittest/usdt/tst.stapsdt-notes-lv.sh
new file mode 100755
index 000000000..f7b2d8691
--- /dev/null
+++ b/test/unittest/usdt/tst.stapsdt-notes-lv.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+#
+# Oracle Linux DTrace.
+# Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+# Licensed under the Universal Permissive License v 1.0 as shown at
+# http://oss.oracle.com/licenses/upl.
+
+# This test covers stapsdt probes fired by the STAP_PROBEn macros,
+# testing listing probes.
+
+if [ $# != 1 ]; then
+	echo expected one argument: '<'dtrace-path'>'
+	exit 2
+fi
+
+dtrace=$1
+CC=/usr/bin/gcc
+CFLAGS="-I${PWD}/test/unittest/usdt"
+
+DIRNAME="$tmpdir/usdt-notes.$$.$RANDOM"
+mkdir -p $DIRNAME
+cd $DIRNAME
+
+cat > test.c <<EOF
+#include <sdt_notes.h>
+
+int
+main(int argc, char **argv)
+{
+	STAP_PROBE(test_prov, zero);
+	STAP_PROBE1(test_prov, one, argc);
+	STAP_PROBE2(test_prov, two, argc, argv[0][0]);
+	STAP_PROBE4(test_prov, args, argc, argv[0], argv[1] + 4, 18);
+}
+EOF
+
+${CC} ${CFLAGS} -o test test.c
+if [ $? -ne 0 ]; then
+	echo "failed to compile test.c" >& 2
+	exit 1
+fi
+
+$dtrace -c './test arg1val' -lvP test_prov\$target
+status=$?
+
+exit $status
-- 
2.45.2

Re: [DTrace-devel] [PATCH] test: add -l and -lv tests for stapsdt probes

[Nick Alcock]

On 6 Aug 2025, Kris Van Hees via DTrace-devel stated:

> The stapsdt support in DTrace provides limited support for argument data
> for probes.  The number of arguments passed to a probe and their native
> type (signed or unsigned int of size 1, 2, 4, or 8 bytes) is discoverable.
>
> Signed-off-by: Kris Van Hees
> <kris.van.hees@oracle.com>

Bit of a linefeed there. ;)

Bit annoying there's so much repetition, but it's really not worth
optimizing that, and it's no worse than any of the others in this area.

Reviewed-by: Nick Alcock <nick.alcock@oracle.com>

-- 
NULL && (void)