8270477: [lworld] bytecode testing API does not emit Q type descriptors

Reviewed-by: mchung

test/hotspot/jtreg/runtime/valhalla/inlinetypes/TestBytecodeLib.java

@@ -0,0 +1,163 @@
+/*
+ * 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.
+ *
+ * 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 runtime.valhalla.inlinetypes;
+
+import java.lang.invoke.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import static jdk.test.lib.Asserts.*;
+
+import jdk.experimental.bytecode.*;
+
+import test.java.lang.invoke.lib.InstructionHelper;
+
+/**
+ * @test TestBytecodeLib
+ * @summary Check bytecode test library generates the correct code for Valhalla changes to JVMS
+ * @library /test/lib /test/jdk/lib/testlibrary/bytecode /test/jdk/java/lang/invoke/common
+ * @build jdk.experimental.bytecode.BasicClassBuilder test.java.lang.invoke.lib.InstructionHelper
+ * @compile Point.java TestBytecodeLib.java
+ * @run main/othervm runtime.valhalla.inlinetypes.TestBytecodeLib
+ */
+
+public class TestBytecodeLib {
+
+    static MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
+
+    public static void main(String[] args) throws Throwable {
+        testAnewarrayDesc();
+        testCheckcastDesc();
+        // No support in test library for "ldc(Class<?>)" at all in this incarnation of the API, skip it
+        testMultianewarrayDesc();
+    }
+
+    // anewarray accepts reference and inline reference type
+    // checkcast for arrays accepts reference and inline reference array type
+    static void testAnewarrayDesc() throws Throwable {
+        Class<?> lClass = Point.ref.class;
+        Class<?> qClass = Point.val.class;
+
+        String methodName = "anewarrayLQClass";
+        MethodType methodType = MethodType.methodType(void.class);
+        byte[] codeBytes = InstructionHelper.buildCode(LOOKUP, methodName, methodType,
+            CODE -> {
+                CODE
+                .iconst_3()
+                .anewarray(lClass)
+                .checkcast(Point.ref[].class)
+                .pop()
+                .iconst_3()
+                .anewarray(qClass)
+                .checkcast(Point.val[].class)
+                .pop()
+                .return_();
+            }
+        );
+
+        // Verify correct byte-code
+        dumpBytes(methodName + ".class", codeBytes);
+
+        // Verify it works
+        InstructionHelper.loadCodeBytes(LOOKUP, methodName, methodType, codeBytes).invokeExact();
+    }
+
+    // checkcast accepts reference and inline reference type
+    static void testCheckcastDesc() throws Throwable {
+        Class<?> lClass = Point.ref.class;
+        Class<?> qClass = Point.val.class;
+
+        String methodName = "checkcastLQClass";
+        MethodType methodType = MethodType.methodType(void.class);
+        byte[] codeBytes = InstructionHelper.buildCode(LOOKUP, methodName, methodType,
+            CODE -> {
+                CODE
+                .defaultvalue(Point.class)
+                .checkcast(lClass) // expect no descriptor here
+                .checkcast(qClass) // expect Q-type descriptor here
+                .pop()
+                .return_();
+            }
+        );
+
+        // Verify correct byte-code
+        dumpBytes(methodName + ".class", codeBytes);
+
+        // Verify it works
+        InstructionHelper.loadCodeBytes(LOOKUP, methodName, methodType, codeBytes).invokeExact();
+    }
+
+    // multianewarray accepts reference and inline reference type...it naturally does, but...
+    // checkcast for multidim arrays accepts reference and inline reference array type
+    static void testMultianewarrayDesc() throws Throwable {
+        Class<?> lClass = Point.ref[][].class;
+        Class<?> qClass = Point.val[][].class;
+
+        String methodName = "multianewarrayLQClass";
+        MethodType methodType = MethodType.methodType(void.class);
+        byte dimCnt = (byte) 2;
+        byte[] codeBytes = InstructionHelper.buildCode(LOOKUP, methodName, methodType,
+            CODE -> {
+                CODE
+                .iconst_3()
+                .iconst_4()
+                .multianewarray(lClass, dimCnt)
+                .checkcast(lClass)
+                .pop()
+                .iconst_3()
+                .iconst_4()
+                .multianewarray(qClass, dimCnt)
+                .checkcast(qClass)
+                .pop()
+                .return_();
+            }
+        );
+
+        // Verify correct byte-code
+        dumpBytes(methodName + ".class", codeBytes);
+
+        // Verify it works
+        InstructionHelper.loadCodeBytes(LOOKUP, methodName, methodType, codeBytes).invokeExact();
+    }
+
+    /*
+        Dump the resulting bytes for inspection.
+
+        TODO: Would prefer programmtic use of ClassReader for verification, but only
+        when the JVMS on q-types is less fluid (since it is a lot of work),
+        so manual inspection for now.
+
+        Dump in the dir above "test-support/<test-suite-run>/scratch/<n>" so it doesn't get clean up at end of run,
+        and use a directory "DUMP_CLASS_FILES" (in keeping with MethodHandles classfile dump)
+     */
+    static void dumpBytes(String name, byte[] bytes) throws java.io.IOException {
+        Path path = Paths.get("../DUMP_CLASS_FILES");
+        Files.createDirectories(path);
+        path = path.resolve(name);
+        System.out.println("Dump: " + path);
+        Files.write(path, bytes);
+    }
+
+
+}

test/jdk/java/lang/invoke/common/test/java/lang/invoke/lib/InstructionHelper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 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
@@ -163,9 +163,9 @@ public static String cref(Class<?> c) {
 
     // loadCode(MethodHandles.Lookup, String, MethodType, Consumer<? super MethodHandleCodeBuilder<?>>) et al...
 
-    public static MethodHandle loadCode(MethodHandles.Lookup lookup, String name, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
+    public static MethodHandle loadCode(MethodHandles.Lookup lookup, String methodName, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
         String className = generateClassNameFromLookupClass(lookup);
-        return loadCode(lookup, className, name, type, builder);
+        return loadCode(lookup, className, methodName, type, builder);
     }
 
     public static MethodHandle loadCode(MethodHandles.Lookup lookup, String className, String methodName, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
@@ -181,31 +181,51 @@ public static MethodHandle loadCode(MethodHandles.Lookup lookup, String classNam
                     builder);
     }
 
+    // Helper method to load code built with "buildCode()"
+    public static MethodHandle loadCodeBytes(MethodHandles.Lookup lookup, String methodName, MethodType type, byte[] byteCode) {
+        try {
+            Class<?> clazz = lookup.defineClass(byteCode);
+            return lookup.findStatic(clazz, methodName, type);
+        } catch (Throwable t) {
+            throw new RuntimeException("Failed to loadCodeBytes \"" + methodName + "\"", t);
+        }
+    }
+
 
     private static <Z, C extends CodeBuilder<Class<?>, String, byte[], ?>> Z loadCode(
             MethodHandles.Lookup lookup, String className, String methodName, String type,
             Function<MethodBuilder<Class<?>, String, byte[]>, ? extends C> builderFunc,
             Function<Class<?>, Z> resFunc, Consumer<? super C> builder) {
-
-        IsolatedMethodBuilder isolatedMethodBuilder = new IsolatedMethodBuilder(className, lookup);
-        isolatedMethodBuilder
-                .withSuperclass(Object.class)
-                .withMajorVersion(62)
-                .withMinorVersion(0)
-                .withFlags(Flag.ACC_PUBLIC)
-                .withMethod(methodName, type, M ->
-                        M.withFlags(Flag.ACC_STATIC, Flag.ACC_PUBLIC)
-                                .withCode(builderFunc, builder));
-
         try {
-            byte[] byteArray = isolatedMethodBuilder.build();
+            byte[] byteArray = buildCode(lookup, className, methodName, type, builderFunc, builder);
             Class<?> clazz = lookup.defineClass(byteArray);
             return resFunc.apply(clazz);
         } catch (Throwable e) {
              throw new IllegalStateException(e);
         }
     }
 
+    public static byte[] buildCode(MethodHandles.Lookup lookup, String methodName, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
+        String className = generateClassNameFromLookupClass(lookup);
+        return buildCode(lookup, className, methodName, type.toMethodDescriptorString(), MethodHandleCodeBuilder::new, builder);
+    }
+
+    public static <C extends CodeBuilder<Class<?>, String, byte[], ?>> byte[] buildCode(
+        MethodHandles.Lookup lookup, String className, String methodName, String type,
+            Function<MethodBuilder<Class<?>, String, byte[]>, ? extends C> builderFunc,
+            Consumer<? super C> builder) {
+
+                return new IsolatedMethodBuilder(className, lookup)
+                    .withSuperclass(Object.class)
+                    .withMajorVersion(62)
+                    .withMinorVersion(0)
+                    .withFlags(Flag.ACC_PUBLIC)
+                    .withMethod(methodName, type, M ->
+                        M.withFlags(Flag.ACC_STATIC, Flag.ACC_PUBLIC)
+                            .withCode(builderFunc, builder)).build();
+
+    }
+
     private static class IsolatedMethodBuilder extends ClassBuilder<Class<?>, String, IsolatedMethodBuilder> {
 
         private static final Class<?> THIS_CLASS = new Object() { }.getClass();
@@ -221,6 +241,9 @@ public Class<?> thisClass() {
         }
 
         static String classToInternalName(Class<?> c) {
+            if (c.isArray()) {
+                return c.descriptorString();
+            }
             return c.getName().replace('.', '/');
         }
 
@@ -260,11 +283,7 @@ public String returnType(String s) {
 
             @Override
             public String type(Class<?> aClass) {
-                if (aClass.isArray()) {
-                    return classToInternalName(aClass);
-                } else {
-                    return (aClass.isValueType() ? "Q" : "L") + classToInternalName(aClass) + ";";
-                }
+                return aClass.descriptorString();
             }
 
             @Override

test/jdk/lib/testlibrary/bytecode/jdk/experimental/bytecode/CodeBuilder.java

@@ -173,19 +173,25 @@ public C newarray(TypeTag tag) {
 
     public C anewarray(S array) {
         emitOp(Opcode.ANEWARRAY, array);
-        code.writeChar(poolHelper.putClass(array));
+        int poolIdx = (typeHelper.isInlineClass(typeHelper.type(array))) ?
+            poolHelper.putInlineClass(array) : poolHelper.putClass(array);
+        code.writeChar(poolIdx);
         return thisBuilder();
     }
 
     public C checkcast(S target) {
         emitOp(Opcode.CHECKCAST);
-        code.writeChar(poolHelper.putClass(target));
+        int poolIdx = (typeHelper.isInlineClass(typeHelper.type(target))) ?
+            poolHelper.putInlineClass(target) : poolHelper.putClass(target);
+        code.writeChar(poolIdx);
         return thisBuilder();
     }
 
     public C instanceof_(S target) {
         emitOp(Opcode.INSTANCEOF);
-        code.writeChar(poolHelper.putClass(target));
+        int poolIdx = (typeHelper.isInlineClass(typeHelper.type(target))) ?
+            poolHelper.putInlineClass(target) : poolHelper.putClass(target);
+        code.writeChar(poolIdx);
         return thisBuilder();
     }