Add JDK Api extractor tool to help with entitlement reviews

libs/entitlement/tools/common/src/main/java/org/elasticsearch/entitlement/tools/Utils.java

@@ -24,12 +24,22 @@
 
 public class Utils {
 
+    // TODO Currently ServerProcessBuilder is using --add-modules=ALL-MODULE-PATH, should this rather
+    // reflect below excludes (except for java.desktop which requires a special handling)?
+    // internal and incubator modules are also excluded
     private static final Set<String> EXCLUDED_MODULES = Set.of(
         "java.desktop",
         "jdk.jartool",
         "jdk.jdi",
         "java.security.jgss",
-        "jdk.jshell"
+        "jdk.jshell",
+        "jdk.jcmd",
+        "jdk.hotspot.agent",
+        "jdk.jfr",
+        "jdk.javadoc",
+        // "jdk.jpackage", // Do we want to include this?
+        // "jdk.jlink", // Do we want to include this?
+        "jdk.localedata" // noise, change here are not interesting
     );
 
     private static Map<String, Set<String>> findModuleExports(FileSystem fs) throws IOException {
@@ -70,7 +80,9 @@ public static void walkJdkModules(JdkModuleConsumer c) throws IOException {
 
             for (var kv : modules.entrySet()) {
                 var moduleName = kv.getKey();
-                if (Utils.EXCLUDED_MODULES.contains(moduleName) == false) {
+                if (Utils.EXCLUDED_MODULES.contains(moduleName) == false
+                    && moduleName.contains(".internal.") == false
+                    && moduleName.contains(".incubator.") == false) {
                     var thisModuleExports = moduleExports.get(moduleName);
                     c.accept(moduleName, kv.getValue(), thisModuleExports);
                 }

libs/entitlement/tools/jdk-api-extractor/README.md

@@ -0,0 +1,20 @@
+This tool scans the JDK on which it is running to extract its public accessible API.
+That is:
+- public methods (including constructors) of public, exported classes as well as protected methods of these if not final.
+- internal implementations (overwrites) of above.
+
+The output of this tool is meant to be diffed against the output for another JDK
+version to identify changes that need to be reviewed for entitlements.
+
+Usage example:
+```bash
+./gradlew :libs:entitlement:tools:jdk-api-extractor:run -Druntime.java=24 --args="api-jdk24.tsv"
+./gradlew :libs:entitlement:tools:jdk-api-extractor:run -Druntime.java=25 --args="api-jdk25.tsv"
+diff libs/entitlement/tools/jdk-api-extractor/api-jdk24.tsv libs/entitlement/tools/jdk-api-extractor/api-jdk25.tsv
+```
+
+To review the diff of deprecations (by means of `@Deprecated`), use `--deprecations-only` as 2nd argument.
+
+```bash
+./gradlew :libs:entitlement:tools:jdk-api-extractor:run -Druntime.java=24 --args="deprecations-jdk24.tsv --deprecations-only"
+```

libs/entitlement/tools/jdk-api-extractor/build.gradle

@@ -0,0 +1,66 @@
+import org.elasticsearch.gradle.OS
+
+plugins {
+  id 'application'
+}
+
+apply plugin: 'elasticsearch.build'
+
+tasks.named("dependencyLicenses").configure {
+  mapping from: /asm-.*/, to: 'asm'
+}
+
+group = 'org.elasticsearch.entitlement.tools'
+
+ext {
+  javaMainClass = "org.elasticsearch.entitlement.tools.jdkapi.JdkApiExtractor"
+}
+
+application {
+  mainClass.set(javaMainClass)
+  applicationDefaultJvmArgs = [
+    '--add-exports', 'java.base/sun.security.util=ALL-UNNAMED',
+    '--add-opens', 'java.base/java.lang=ALL-UNNAMED',
+    '--add-opens', 'java.base/java.net=ALL-UNNAMED',
+    '--add-opens', 'java.base/java.net.spi=ALL-UNNAMED',
+    '--add-opens', 'java.base/java.util.concurrent=ALL-UNNAMED',
+    '--add-opens', 'java.base/javax.crypto=ALL-UNNAMED',
+    '--add-opens', 'java.base/javax.security.auth=ALL-UNNAMED',
+    '--add-opens', 'java.base/jdk.internal.logger=ALL-UNNAMED',
+    '--add-opens', 'java.base/sun.nio.ch=ALL-UNNAMED',
+    '--add-opens', 'jdk.management.jfr/jdk.management.jfr=ALL-UNNAMED',
+    '--add-opens', 'java.logging/java.util.logging=ALL-UNNAMED',
+    '--add-opens', 'java.logging/sun.util.logging.internal=ALL-UNNAMED',
+    '--add-opens', 'java.naming/javax.naming.ldap.spi=ALL-UNNAMED',
+    '--add-opens', 'java.rmi/sun.rmi.runtime=ALL-UNNAMED',
+    '--add-opens', 'jdk.dynalink/jdk.dynalink=ALL-UNNAMED',
+    '--add-opens', 'jdk.dynalink/jdk.dynalink.linker=ALL-UNNAMED',
+    '--add-opens', 'java.desktop/sun.awt=ALL-UNNAMED',
+    '--add-opens', 'java.sql.rowset/javax.sql.rowset.spi=ALL-UNNAMED',
+    '--add-opens', 'java.sql/java.sql=ALL-UNNAMED',
+    '--add-opens', 'java.xml.crypto/com.sun.org.apache.xml.internal.security.utils=ALL-UNNAMED'
+  ]
+}
+
+tasks.named("run").configure {
+  executable = "${buildParams.runtimeJavaHome.get()}/bin/java" + (OS.current() == OS.WINDOWS ? '.exe' : '')
+}
+
+repositories {
+  mavenCentral()
+}
+
+dependencies {
+  compileOnly(project(':libs:core'))
+  implementation 'org.ow2.asm:asm:9.8'
+  implementation 'org.ow2.asm:asm-util:9.8'
+  implementation(project(':libs:entitlement:tools:common'))
+}
+
+tasks.named('forbiddenApisMain').configure {
+  replaceSignatureFiles 'jdk-signatures'
+}
+
+tasks.named("thirdPartyAudit").configure {
+  ignoreMissingClasses()
+}

libs/entitlement/tools/jdk-api-extractor/licenses/asm-LICENSE.txt

@@ -0,0 +1,26 @@
+Copyright (c) 2012 France Télécom
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. Neither the name of the copyright holders nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.

libs/entitlement/tools/jdk-api-extractor/licenses/asm-NOTICE.txt

@@ -0,0 +1 @@
+