[PATCH v2 4/4] test: Add test for predefined preprocessor definitions

[eugene.loh@oracle.com]

From: Eugene Loh <eugene.loh@oracle.com>

Orabug: 28763074
Signed-off-by: Eugene Loh <eugene.loh@oracle.com>
Reviewed-by: Kris Van Hees <kris.van.hees@oracle.com>
---
 COMMANDLINE-OPTIONS                          |  10 +-
 test/unittest/preprocessor/tst.predefined.r  |   1 +
 test/unittest/preprocessor/tst.predefined.sh | 119 +++++++++++++++++++
 3 files changed, 125 insertions(+), 5 deletions(-)
 create mode 100644 test/unittest/preprocessor/tst.predefined.r
 create mode 100755 test/unittest/preprocessor/tst.predefined.sh

diff --git a/COMMANDLINE-OPTIONS b/COMMANDLINE-OPTIONS
index 40561af91..73be89b1f 100644
--- a/COMMANDLINE-OPTIONS
+++ b/COMMANDLINE-OPTIONS
@@ -321,12 +321,12 @@ definitions are always specified and valid in all modes:
     * __sparcv9 (on SPARC® systems only when 64–bit programs are compiled)
     * __i386 (on x86 systems only when 32–bit programs are compiled)
     * __amd64 (on x86 systems only when 64–bit programs are compiled)
-    * _`uname -s` (for example, __Linux)
+    * __`uname -s` (for example, __Linux)
     * __SUNW_D=1
-    * _SUNW_D_VERSION=0x_MMmmmuuu (where MM is the Major release value
-      in hexadecimal, mmm is the Minor release value in hexadecimal,
-      and uuu is the Micro release value in hexadecimal; see Chapter
-      41, Versioning for more information about DTrace versioning)
+    * _SUNW_D_VERSION=(MM << 24 | mmm << 12 | uuu), where
+      MM is the Major release value
+      mmm is the Minor release value
+      uuu is the Micro release value
 
 -Z
 Permit probe descriptions that match zero probes. If the -Z option is
diff --git a/test/unittest/preprocessor/tst.predefined.r b/test/unittest/preprocessor/tst.predefined.r
new file mode 100644
index 000000000..2e9ba477f
--- /dev/null
+++ b/test/unittest/preprocessor/tst.predefined.r
@@ -0,0 +1 @@
+success
diff --git a/test/unittest/preprocessor/tst.predefined.sh b/test/unittest/preprocessor/tst.predefined.sh
new file mode 100755
index 000000000..47e35d9c6
--- /dev/null
+++ b/test/unittest/preprocessor/tst.predefined.sh
@@ -0,0 +1,119 @@
+#!/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.
+#
+# Confirm preprocessor pre-definitions.
+
+dtrace=$1
+
+DIRNAME=$tmpdir/predefined.$$.$RANDOM
+mkdir -p $DIRNAME
+cd $DIRNAME
+
+# Arg 1 is macro that we check is defined.
+
+function check_defined() {
+	# Add to script: #ifdef is okay, else is ERROR.
+	echo '#ifdef' $1                         >> D.d
+	echo 'printf("'$1' okay\n");'            >> D.d
+	echo '#else'                             >> D.d
+	echo 'printf("ERROR!  missing '$1'\n");' >> D.d
+	echo '#endif'                            >> D.d
+
+	# Add to check file: expect "okay" message.
+	echo $1 okay                             >> chk.txt
+}
+
+# Arg 1 is macro whose value we check to be arg 2.
+
+function check_value() {
+	# Add to script: print value.
+	echo 'printf("'$1'=%x\n", '$1');'        >> D.d
+
+	# Add to check file: expected value.
+	echo $1=$2                               >> chk.txt
+}
+
+# Arg 1 is macro that we check is not defined.
+
+function check_undef() {
+	# Add to script: #ifdef is ERROR, else is okay.
+	echo '#ifdef' $1                         >> D.d
+	echo 'printf("ERROR!  found '$1'\n");'   >> D.d
+	echo '#else'                             >> D.d
+	echo 'printf("missing '$1' is okay\n");' >> D.d
+	echo '#endif'                            >> D.d
+
+	# Add to check file: expect "okay" message.
+	echo missing $1 is okay                  >> chk.txt
+}
+
+# Construct version string (major, minor, micro).
+
+read MM mmm uuu <<< `$dtrace -vV | awk '/^This is DTrace / { gsub("\\\.", " "); print $(NF-2), $(NF-1), $NF }'`
+vers=`printf "%x" $(($MM << 24 | $mmm << 12 | $uuu))`
+
+# Start setting up the D script.
+
+echo 'BEGIN {' > D.d
+
+# Check for the preprocessor definitions of COMMANDLINE-OPTIONS.
+
+check_defined __linux
+check_defined __unix
+check_defined __SVR4
+if [ `uname -m` == x86_64 ]; then
+check_defined __amd64
+else
+check_undef   __amd64
+fi
+check_defined __`uname -s`
+check_value   __SUNW_D 1
+check_value   __SUNW_D_VERSION $vers
+
+# Confirm other preprocessor definitions.
+
+check_defined __SUNW_D_64
+
+# Confirm that __GNUC__ is not present.
+
+check_undef __GNUC__
+
+# Finish setting up the D script.
+
+echo 'exit(0); }' >> D.d
+echo              >> chk.txt
+
+# Run the D script.
+
+$dtrace $dt_flags -qCs D.d -o out.txt
+if [ $? -ne 0 ]; then
+	echo ERROR: DTrace failed
+	echo "==== D.d"
+	cat        D.d
+	echo "==== out.txt"
+	cat        out.txt
+	exit 1
+fi
+
+# Check.
+
+if ! diff -q chk.txt out.txt; then
+	echo ERROR output disagrees
+	echo === expect ===
+	cat chk.txt
+	echo === actual ===
+	cat out.txt
+	echo === diff ===
+	diff chk.txt out.txt
+	exit 1
+fi
+
+# Indicate success.
+
+echo success
+
+exit 0
-- 
2.43.5