8296961: [JVMCI] Access to j.l.r.Method/Constructor/Field for ResolvedJavaMethod/ResolvedJavaField

Backport-of: 5db1b58c867608573a9e7cc57ca2ba22c9dd80d4

Author: jerboaa

src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJDKReflection.java

@@ -283,7 +283,7 @@ JavaConstant boxPrimitive(JavaConstant source) {
      * Gets a {@link Method} object corresponding to {@code method}. This method guarantees the same
      * {@link Method} object is returned if called twice on the same {@code method} value.
      */
-    private static Executable getMethod(HotSpotResolvedJavaMethodImpl method) {
+    static Executable getMethod(HotSpotResolvedJavaMethodImpl method) {
         assert !method.isClassInitializer() : method;
         if (method.toJavaCache == null) {
             synchronized (method) {
@@ -303,7 +303,7 @@ private static Executable getMethod(HotSpotResolvedJavaMethodImpl method) {
      * {@code f} and annotation class {@code a}, the same object is returned for each call to
      * {@code f.getAnnotation(a)}).
      */
-    private static Field getField(HotSpotResolvedJavaFieldImpl field) {
+    static Field getField(HotSpotResolvedJavaFieldImpl field) {
         HotSpotResolvedObjectTypeImpl declaringClass = field.getDeclaringClass();
         synchronized (declaringClass) {
             HashMap<HotSpotResolvedJavaFieldImpl, Field> cache = declaringClass.reflectionFieldCache;

src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCIRuntime.java

@@ -35,6 +35,8 @@
 import java.lang.invoke.ConstantCallSite;
 import java.lang.invoke.MethodHandle;
 import java.lang.ref.WeakReference;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Field;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.util.ArrayList;
@@ -60,6 +62,8 @@
 import jdk.vm.ci.common.NativeImageReinitialize;
 import jdk.vm.ci.meta.JavaKind;
 import jdk.vm.ci.meta.JavaType;
+import jdk.vm.ci.meta.ResolvedJavaField;
+import jdk.vm.ci.meta.ResolvedJavaMethod;
 import jdk.vm.ci.meta.ResolvedJavaType;
 import jdk.vm.ci.meta.UnresolvedJavaType;
 import jdk.vm.ci.runtime.JVMCI;
@@ -767,7 +771,7 @@ public boolean test(ResolvedJavaType type) {
     }
 
     /**
-     * Get the {@link Class} corresponding to {@code type}.
+     * Gets the {@link Class} corresponding to {@code type}.
      *
      * @param type the type for which a {@link Class} is requested
      * @return the original Java class corresponding to {@code type} or {@code null} if this runtime
@@ -781,6 +785,36 @@ public Class<?> getMirror(ResolvedJavaType type) {
         return null;
     }
 
+    /**
+     * Gets the {@link Executable} corresponding to {@code method}.
+     *
+     * @param method the method for which an {@link Executable} is requested
+     * @return the original Java method or constructor corresponding to {@code method} or
+     *         {@code null} if this runtime does not support mapping {@link ResolvedJavaMethod}
+     *         instances to {@link Executable} instances
+     */
+    public Executable getMirror(ResolvedJavaMethod method) {
+        if (method instanceof HotSpotResolvedJavaMethodImpl && reflection instanceof HotSpotJDKReflection) {
+            return HotSpotJDKReflection.getMethod((HotSpotResolvedJavaMethodImpl) method);
+        }
+        return null;
+    }
+
+    /**
+     * Gets the {@link Field} corresponding to {@code field}.
+     *
+     * @param field the field for which a {@link Field} is requested
+     * @return the original Java field corresponding to {@code field} or {@code null} if this
+     *         runtime does not support mapping {@link ResolvedJavaField} instances to {@link Field}
+     *         instances
+     */
+    public Field getMirror(ResolvedJavaField field) {
+        if (field instanceof HotSpotResolvedJavaFieldImpl && reflection instanceof HotSpotJDKReflection) {
+            return HotSpotJDKReflection.getField((HotSpotResolvedJavaFieldImpl) field);
+        }
+        return null;
+    }
+
     static class ErrorCreatingCompiler implements JVMCICompiler {
         private final RuntimeException t;