test/lib/jdk/test/lib/Platform.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2020, 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.

@@ -24,10 +24,12 @@
 package jdk.test.lib;
 
 import java.io.File;
 import java.io.IOException;
 import java.io.RandomAccessFile;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.regex.Pattern;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.security.PrivilegedActionException;
 import java.security.PrivilegedExceptionAction;

@@ -43,10 +45,11 @@
     private static final String vmVersion   = privilegedGetProperty("java.vm.version");
     private static final String jdkDebug    = privilegedGetProperty("jdk.debug");
     private static final String osArch      = privilegedGetProperty("os.arch");
     private static final String userName    = privilegedGetProperty("user.name");
     private static final String compiler    = privilegedGetProperty("sun.management.compiler");
+    private static final String testJdk     = privilegedGetProperty("test.jdk");
 
     private static String privilegedGetProperty(String key) {
         return AccessController.doPrivileged((
                 PrivilegedAction<String>) () -> System.getProperty(key));
     }

@@ -332,10 +335,39 @@
         } else {
             return "LD_LIBRARY_PATH";
         }
     }
 
+    /**
+     * Returns absolute path to directory containing JVM shared library.
+     */
+    public static Path jvmLibDir() {
+        Path dir = Paths.get(testJdk);
+        if (Platform.isWindows()) {
+            return dir.resolve("bin")
+                .resolve(variant())
+                .toAbsolutePath();
+        } else {
+            return dir.resolve("lib")
+                .resolve(variant())
+                .toAbsolutePath();
+        }
+    }
+
+    private static String variant() {
+        if (Platform.isServer()) {
+            return "server";
+        } else if (Platform.isClient()) {
+            return "client";
+        } else if (Platform.isMinimal()) {
+            return "minimal";
+        } else {
+            throw new Error("TESTBUG: unsupported vm variant");
+        }
+    }
+
+
     public static boolean isDefaultCDSArchiveSupported() {
         return (is64bit()  &&
                 isServer() &&
                 (isLinux()   ||
                  isOSX()     ||