test/hotspot/jtreg/runtime/appcds/jigsaw/modulepath/MainModuleOnly.java

*** 35,46 ****
--- 35,48 ----
  
  import java.io.File;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
+ import java.util.Arrays;
  
  import jdk.test.lib.process.OutputAnalyzer;
+ import jdk.test.lib.Platform;
  import jdk.testlibrary.ProcessTools;
  
  public class MainModuleOnly {
  
      private static final Path USER_DIR = Paths.get(System.getProperty("user.dir"));
*** 175,186 ****
                  "A jar file is not the one used while building the shared archive file:");
          // create an archive with a non-empty directory in the --module-path.
          // The dumping process will exit with an error due to non-empty directory
          // in the --module-path.
          output = TestCommon.createArchive(destJar.toString(), appClasses,
-                                           "-Xlog:class+load=trace",
                                            "--module-path", MODS_DIR.toString(),
                                            "-m", TEST_MODULE1);
          output.shouldHaveExitValue(1)
                .shouldMatch("Error: non-empty directory.*com.simple");
      }
  }
--- 177,231 ----
                  "A jar file is not the one used while building the shared archive file:");
          // create an archive with a non-empty directory in the --module-path.
          // The dumping process will exit with an error due to non-empty directory
          // in the --module-path.
          output = TestCommon.createArchive(destJar.toString(), appClasses,
                                            "--module-path", MODS_DIR.toString(),
                                            "-m", TEST_MODULE1);
          output.shouldHaveExitValue(1)
                .shouldMatch("Error: non-empty directory.*com.simple");
+ 
+         // test module path with very long length
+         //
+         // This test can't be run on the windows platform due to an existing
+         // issue in ClassLoader::get_canonical_path() (JDK-8190737).
+         if (Platform.isWindows()) {
+             System.out.println("Long module path test cannot be tested on the Windows platform.");
+             return;
+         }
+         Path longDir = USER_DIR;
+         int pathLen = longDir.toString().length();
+         int PATH_LEN = 2034;
+         int MAX_DIR_LEN = 250;
+         while (pathLen < PATH_LEN) {
+             int remaining = PATH_LEN - pathLen;
+             int subPathLen = remaining > MAX_DIR_LEN ? MAX_DIR_LEN : remaining;
+             char[] chars = new char[subPathLen];
+             Arrays.fill(chars, 'x');
+             String subPath = new String(chars);
+             longDir = Paths.get(longDir.toString(), subPath);
+             pathLen = longDir.toString().length();
+         }
+         File longDirFile = new File(longDir.toString());
+         try {
+             longDirFile.mkdirs();
+         } catch (Exception e) {
+             throw e;
+         }
+         Path longDirJar = longDir.resolve(TEST_MODULE1 + ".jar");
+         // IOException results from the Files.copy() call on platform
+         // such as MacOS X. Test can't be proceeded further with the
+         // exception.
+         try {
+             Files.copy(destJar, longDirJar);
+         } catch (java.io.IOException ioe) {
+             System.out.println("Caught IOException from Files.copy(). Cannot continue.");
+             return;
+         }
+         output = TestCommon.createArchive(destJar.toString(), appClasses,
+                                           "-Xlog:exceptions=trace",
+                                           "--module-path", longDirJar.toString(),
+                                           "-m", TEST_MODULE1);
+         output.shouldHaveExitValue(1)
+               .shouldMatch("os::stat error.*ENAMETOOLONG.*CDS dump aborted");
      }
  }