From 3cdd6fde83ce6387e26341f4a3c0d2e80e60eb8c Mon Sep 17 00:00:00 2001
From: Josef Eisl <josef.eisl@oracle.com>
Date: Tue, 28 Oct 2025 11:37:41 +0100
Subject: [PATCH 1/3] svm: introduce
 LambdaUtils#isLambdaClass(ResolvedJavaType)

---
 .../src/jdk/graal/compiler/java/LambdaUtils.java       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java b/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java
index e65f0a13e43c..653b645599c1 100644
--- a/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java
+++ b/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java
@@ -180,6 +180,16 @@ public static String capturingClass(String className) {
         return className.split(LambdaUtils.SERIALIZATION_TEST_LAMBDA_CLASS_SPLIT_PATTERN)[0];
     }
 
+    /**
+     * Checks if the passed class is lambda class.
+     *
+     * @param type the type to be checked
+     * @return true if the clazz is lambda class, false instead
+     */
+    public static boolean isLambdaClass(ResolvedJavaType type) {
+        return isLambdaClassName(type.toClassName());
+    }
+
     /**
      * Checks if the passed class is lambda class.
      *

From c999c949dbe8abfc7b61f4bd667950dc40b2aa68 Mon Sep 17 00:00:00 2001
From: Josef Eisl <josef.eisl@oracle.com>
Date: Wed, 29 Oct 2025 13:59:13 +0100
Subject: [PATCH 2/3] svm: add JVMCIReflectionUtil#getPackageName()

---
 .../com/oracle/svm/util/JVMCIReflectionUtil.java | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/substratevm/src/com.oracle.svm.util/src/com/oracle/svm/util/JVMCIReflectionUtil.java b/substratevm/src/com.oracle.svm.util/src/com/oracle/svm/util/JVMCIReflectionUtil.java
index d8986e4703f1..7a3954e870da 100644
--- a/substratevm/src/com.oracle.svm.util/src/com/oracle/svm/util/JVMCIReflectionUtil.java
+++ b/substratevm/src/com.oracle.svm.util/src/com/oracle/svm/util/JVMCIReflectionUtil.java
@@ -210,4 +210,20 @@ public static List<ResolvedJavaField> getAllFields(ResolvedJavaType declaringCla
         System.arraycopy(instanceFields, 0, allFields, staticFields.length, instanceFields.length);
         return Collections.unmodifiableList(Arrays.asList(allFields));
     }
+
+    /**
+     * Gets the package name for a {@link ResolvedJavaType}. This is the same as calling
+     * {@link Class#getPackageName()} on the underlying class.
+     * <p>
+     * Implementation derived from {@link Class#getPackageName()}.
+     */
+    public static String getPackageName(ResolvedJavaType type) {
+        ResolvedJavaType c = type.isArray() ? type.getElementalType() : type;
+        if (c.isPrimitive()) {
+            return "java.lang";
+        }
+        String cn = c.toClassName();
+        int dot = cn.lastIndexOf('.');
+        return (dot != -1) ? cn.substring(0, dot).intern() : "";
+    }
 }

From 5f293a7c4da376d080e912c91b40171b640a01e8 Mon Sep 17 00:00:00 2001
From: Josef Eisl <josef.eisl@oracle.com>
Date: Mon, 27 Oct 2025 14:14:00 +0100
Subject: [PATCH 3/3] svm: improve javadoc

---
 .../src/jdk/graal/compiler/java/LambdaUtils.java      |  4 ++--
 .../com/oracle/svm/graal/RuntimeCPUFeatureRegion.java | 11 +++++++----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java b/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java
index 653b645599c1..113e649959c4 100644
--- a/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java
+++ b/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/java/LambdaUtils.java
@@ -181,10 +181,10 @@ public static String capturingClass(String className) {
     }
 
     /**
-     * Checks if the passed class is lambda class.
+     * Checks if the passed class is a lambda class.
      *
      * @param type the type to be checked
-     * @return true if the clazz is lambda class, false instead
+     * @return true if type is a lambda class, false instead
      */
     public static boolean isLambdaClass(ResolvedJavaType type) {
         return isLambdaClassName(type.toClassName());
diff --git a/substratevm/src/com.oracle.svm.graal/src/com/oracle/svm/graal/RuntimeCPUFeatureRegion.java b/substratevm/src/com.oracle.svm.graal/src/com/oracle/svm/graal/RuntimeCPUFeatureRegion.java
index f72b7ba6d21b..7bf45a585b74 100644
--- a/substratevm/src/com.oracle.svm.graal/src/com/oracle/svm/graal/RuntimeCPUFeatureRegion.java
+++ b/substratevm/src/com.oracle.svm.graal/src/com/oracle/svm/graal/RuntimeCPUFeatureRegion.java
@@ -233,17 +233,20 @@ private RuntimeCPUFeatureRegion() {
      * <p>
      * All arguments must be compile-time constant.
      */
-    public static native RuntimeCPUFeatureRegion enter(@ConstantNodeParameter Enum<?> arg0);
+    public static native RuntimeCPUFeatureRegion enterSet(@ConstantNodeParameter EnumSet<?> features);
 
-    public static native RuntimeCPUFeatureRegion enterSet(@ConstantNodeParameter EnumSet<?> arg0);
+    /**
+     * @see #enterSet(EnumSet)
+     */
+    public static native RuntimeCPUFeatureRegion enter(@ConstantNodeParameter Enum<?> arg0);
 
     /**
-     * @see #enter(Enum)
+     * @see #enterSet(EnumSet)
      */
     public static native <T extends Enum<T>> RuntimeCPUFeatureRegion enter(@ConstantNodeParameter Enum<T> arg0, @ConstantNodeParameter Enum<T> arg1);
 
     /**
-     * @see #enter(Enum)
+     * @see #enterSet(EnumSet)
      */
     public static native <T extends Enum<T>> RuntimeCPUFeatureRegion enter(@ConstantNodeParameter Enum<T> arg0, @ConstantNodeParameter Enum<T> arg1, @ConstantNodeParameter Enum<T> arg2);