src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java

@@ -609,27 +609,47 @@
         mv.visitVarInsn(Opcodes.ALOAD, localsMap[0]);
         mv.visitMethodInsn(Opcodes.INVOKESTATIC, MHI, "assertSame", LLV_SIG, false);
         return true;
     }
 
+    static String className(String cn) {
+        assert checkClassName(cn): "Class not found: " + cn;
+        return cn;
+    }
+   
+    static boolean checkClassName(String cn) {
+        String fqcn = cn.substring(1, cn.length() - 1).replace('/', '.');
+        try {
+            Class<?> c = Class.forName(fqcn, false, null);
+            return true;
+        } catch (ClassNotFoundException e) {
+            return false;
+        }
+    }
+
+    static final String  LAMBDA_FORM_HIDDEN_CLASS_SIG = className("Ljava/lang/invoke/LambdaForm$Hidden;");
+    static final String  LAMBDA_FORM_COMPILED_CLASS_SIG = className("Ljava/lang/invoke/LambdaForm$Compiled;");
+    static final String  FORCEINLINE_CLASS_SIG = className("Ljdk/internal/vm/annotation/ForceInline;");
+    static final String  DONTINLINE_CLASS_SIG = className("Ljdk/internal/vm/annotation/DontInline;");
+
     /**
      * Generate an invoker method for the passed {@link LambdaForm}.
      */
     private byte[] generateCustomizedCodeBytes() {
         classFilePrologue();
 
         // Suppress this method in backtraces displayed to the user.
-        mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
+        mv.visitAnnotation(LAMBDA_FORM_HIDDEN_CLASS_SIG, true);
 
         // Mark this method as a compiled LambdaForm
-        mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Compiled;", true);
+        mv.visitAnnotation(LAMBDA_FORM_COMPILED_CLASS_SIG, true);
 
         if (lambdaForm.forceInline) {
             // Force inlining of this invoker method.
-            mv.visitAnnotation("Ljdk/internal/vm/annotation/ForceInline;", true);
+            mv.visitAnnotation(FORCEINLINE_CLASS_SIG, true);
         } else {
-            mv.visitAnnotation("Ljdk/internal/vm/annotation/DontInline;", true);
+            mv.visitAnnotation(DONTINLINE_CLASS_SIG, true);
         }
 
         if (lambdaForm.customized != null) {
             // Since LambdaForm is customized for a particular MethodHandle, it's safe to substitute
             // receiver MethodHandle (at slot #0) with an embedded constant and use it instead.