[GR-34891] Fix SpotBugs warning.

PullRequest: graal/10235

tools/src/com.oracle.truffle.tools.chromeinspector/src/com/oracle/truffle/tools/chromeinspector/instrument/InspectorInstrument.java

@@ -507,6 +507,7 @@ private static String generateSecureToken() {
             return Base64.getEncoder().withoutPadding().encodeToString(tokenRaw).replace('/', '_').replace('+', '-');
         }
 
+        @SuppressFBWarnings(value = "DMI_RANDOM_USED_ONLY_ONCE", justification = "avoiding a static field which would cache the random seed in a native image")
         private static byte[] generateSecureRawToken() {
             // 256 bits of entropy ought to be enough for everybody
             final byte[] tokenRaw = new byte[32];

tools/src/com.oracle.truffle.tools.chromeinspector/src/com/oracle/truffle/tools/chromeinspector/instrument/SuppressFBWarnings.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.tools.chromeinspector.instrument;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Used to suppress <a href="https://spotbugs.readthedocs.io">SpotBugs</a> warnings.
+ */
+@Retention(RetentionPolicy.CLASS)
+@interface SuppressFBWarnings {
+    /**
+     * @see "https://spotbugs.readthedocs.io/en/latest/bugDescriptions.html"
+     */
+    String[] value();
+
+    /**
+     * Reason why the warning is suppressed. Use a SpotBugs issue id where appropriate.
+     */
+
+    String justification();
+}