8284858: Start of release updates for JDK 20

8286035: Add source 20 and target 20 to javac
8286034: Add SourceVersion.RELEASE_20

Reviewed-by: dholmes, kcr, iris, erikj, jjg, ihse

Author: jddarcy

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
 project=jdk
 jbs=JDK
-version=19
+version=20
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists

make/conf/version-numbers.conf

@@ -26,17 +26,17 @@
 # Default version, product, and vendor information to use,
 # unless overridden by configure
 
-DEFAULT_VERSION_FEATURE=19
+DEFAULT_VERSION_FEATURE=20
 DEFAULT_VERSION_INTERIM=0
 DEFAULT_VERSION_UPDATE=0
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2022-09-20
-DEFAULT_VERSION_CLASSFILE_MAJOR=63  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
+DEFAULT_VERSION_DATE=2023-03-21
+DEFAULT_VERSION_CLASSFILE_MAJOR=64  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11
-DEFAULT_ACCEPTABLE_BOOT_VERSIONS="18 19"
-DEFAULT_JDK_SOURCE_TARGET_VERSION=19
+DEFAULT_ACCEPTABLE_BOOT_VERSIONS="18 19 20"
+DEFAULT_JDK_SOURCE_TARGET_VERSION=20
 DEFAULT_PROMOTED_VERSION_PRE=ea

make/scripts/generate-symbol-data.sh

@@ -38,7 +38,7 @@
 #   directory.
 # - open a terminal program and run these commands:
 #     cd "${JDK_CHECKOUT}"/src/jdk.compiler/share/data/symbols
-#     bash ../../scripts/generate-symbol-data.sh "${JDK_N_INSTALL}"
+#     bash ../../../../../make/scripts/generate-symbol-data.sh "${JDK_N_INSTALL}"
 # - this command will generate or update data for "--release N" into the ${JDK_CHECKOUT}/src/jdk.compiler/share/data/symbols
 #   directory, updating all registration necessary. If the goal was to update the data, and there are no
 #   new or changed files in the ${JDK_CHECKOUT}/src/jdk.compiler/share/data/symbols directory after running this script,
@@ -73,5 +73,5 @@ $1/bin/java --add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED \
             --add-exports jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED \
             --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED \
             --add-modules jdk.jdeps \
-            ../../../make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java \
+            ../../../../../make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java \
             build-description-incremental symbols include.list

src/hotspot/share/classfile/classFileParser.cpp

@@ -141,6 +141,8 @@
 
 #define JAVA_19_VERSION                   63
 
+#define JAVA_20_VERSION                   64
+
 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
   assert((bad_constant == JVM_CONSTANT_Module ||
           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,

src/java.base/share/classes/jdk/internal/org/objectweb/asm/ClassReader.java

@@ -226,7 +226,7 @@ public ClassReader(
         this.b = classFileBuffer;
         // Check the class' major_version. This field is after the magic and minor_version fields, which
         // use 4 and 2 bytes respectively.
-        if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V19) {
+        if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V20) {
             throw new IllegalArgumentException(
                     "Unsupported class file major version " + readShort(classFileOffset + 6));
         }

src/java.base/share/classes/jdk/internal/org/objectweb/asm/Opcodes.java

@@ -309,6 +309,7 @@ public interface Opcodes {
     int V17 = 0 << 16 | 61;
     int V18 = 0 << 16 | 62;
     int V19 = 0 << 16 | 63;
+    int V20 = 0 << 16 | 64;
 
     /**
       * Version flag indicating that the class is using 'preview' features.

src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

@@ -351,7 +351,15 @@ public enum SourceVersion {
      *
      * @since 19
      */
-    RELEASE_19;
+    RELEASE_19,
+
+    /**
+     * The version recognized by the Java Platform, Standard Edition
+     * 20.
+     *
+     * @since 20
+     */
+    RELEASE_20;
 
     // Note that when adding constants for newer releases, the
     // behavior of latest() and latestSupported() must be updated too.
@@ -360,7 +368,7 @@ public enum SourceVersion {
      * {@return the latest source version that can be modeled}
      */
     public static SourceVersion latest() {
-        return RELEASE_19;
+        return RELEASE_20;
     }
 
     private static final SourceVersion latestSupported = getLatestSupported();
@@ -375,7 +383,7 @@ public static SourceVersion latest() {
     private static SourceVersion getLatestSupported() {
         int intVersion = Runtime.version().feature();
         return (intVersion >= 11) ?
-            valueOf("RELEASE_" + Math.min(19, intVersion)):
+            valueOf("RELEASE_" + Math.min(20, intVersion)):
             RELEASE_10;
     }
 

src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitor14.java

@@ -44,7 +44,7 @@
  * @see AbstractAnnotationValueVisitor9
  * @since 14
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public abstract class AbstractAnnotationValueVisitor14<R, P> extends AbstractAnnotationValueVisitor9<R, P> {
 
     /**

src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor14.java

@@ -49,7 +49,7 @@
  * @see AbstractElementVisitor9
  * @since 16
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public abstract class AbstractElementVisitor14<R, P> extends AbstractElementVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses to call.

src/java.compiler/share/classes/javax/lang/model/util/AbstractTypeVisitor14.java

@@ -47,7 +47,7 @@
  * @see AbstractTypeVisitor9
  * @since 14
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public abstract class AbstractTypeVisitor14<R, P> extends AbstractTypeVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses to call.

src/java.compiler/share/classes/javax/lang/model/util/ElementKindVisitor14.java

@@ -61,7 +61,7 @@
  * @see ElementKindVisitor9
  * @since 16
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public class ElementKindVisitor14<R, P> extends ElementKindVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses; uses {@code null} for the

src/java.compiler/share/classes/javax/lang/model/util/ElementScanner14.java

@@ -77,7 +77,7 @@
  * @see ElementScanner9
  * @since 16
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public class ElementScanner14<R, P> extends ElementScanner9<R, P> {
     /**
      * Constructor for concrete subclasses; uses {@code null} for the

src/java.compiler/share/classes/javax/lang/model/util/SimpleAnnotationValueVisitor14.java

@@ -52,7 +52,7 @@
  * @see SimpleAnnotationValueVisitor9
  * @since 14
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public class SimpleAnnotationValueVisitor14<R, P> extends SimpleAnnotationValueVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses; uses {@code null} for the

src/java.compiler/share/classes/javax/lang/model/util/SimpleElementVisitor14.java

@@ -57,7 +57,7 @@
  * @see SimpleElementVisitor9
  * @since 16
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public class SimpleElementVisitor14<R, P> extends SimpleElementVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses; uses {@code null} for the

src/java.compiler/share/classes/javax/lang/model/util/SimpleTypeVisitor14.java

@@ -56,7 +56,7 @@
  * @see SimpleTypeVisitor9
  * @since 14
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public class SimpleTypeVisitor14<R, P> extends SimpleTypeVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses; uses {@code null} for the

src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor14.java

@@ -61,7 +61,7 @@
  * @see TypeKindVisitor9
  * @since 14
  */
-@SupportedSourceVersion(RELEASE_19)
+@SupportedSourceVersion(RELEASE_20)
 public class TypeKindVisitor14<R, P> extends TypeKindVisitor9<R, P> {
     /**
      * Constructor for concrete subclasses to call; uses {@code null}

src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java

@@ -122,7 +122,12 @@ public enum Source {
     /**
       * 19, tbd
       */
-    JDK19("19");
+    JDK19("19"),
+
+    /**
+      * 20, tbd
+      */
+    JDK20("20");
 
     private static final Context.Key<Source> sourceKey = new Context.Key<>();
 
@@ -174,6 +179,7 @@ public boolean isSupported() {
 
     public Target requiredTarget() {
         return switch(this) {
+        case JDK20  -> Target.JDK1_20;
         case JDK19  -> Target.JDK1_19;
         case JDK18  -> Target.JDK1_18;
         case JDK17  -> Target.JDK1_17;
@@ -322,6 +328,7 @@ public static SourceVersion toSourceVersion(Source source) {
         case JDK17  -> RELEASE_17;
         case JDK18  -> RELEASE_18;
         case JDK19  -> RELEASE_19;
+        case JDK20  -> RELEASE_20;
         default     -> null;
         };
     }

src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassFile.java

@@ -120,7 +120,8 @@ public enum Version {
         V60(60, 0),   // JDK 16
         V61(61, 0),   // JDK 17
         V62(62, 0),   // JDK 18
-        V63(63, 0);   // JDK 19
+        V63(63, 0),   // JDK 19
+        V64(64, 0);   // JDK 20
         Version(int major, int minor) {
             this.major = major;
             this.minor = minor;

src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java

@@ -91,7 +91,10 @@ public enum Target {
     JDK1_18("18", 62, 0),
 
     /** JDK 19. */
-    JDK1_19("19", 63, 0);
+    JDK1_19("19", 63, 0),
+
+    /** JDK 20. */
+    JDK1_20("20", 64, 0);
 
     private static final Context.Key<Target> targetKey = new Context.Key<>();
 

src/jdk.compiler/share/classes/com/sun/tools/javac/processing/PrintingProcessor.java

@@ -55,7 +55,7 @@
  * deletion without notice.</b>
  */
 @SupportedAnnotationTypes("*")
-@SupportedSourceVersion(SourceVersion.RELEASE_19)
+@SupportedSourceVersion(SourceVersion.RELEASE_20)
 public class PrintingProcessor extends AbstractProcessor {
     PrintWriter writer;