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* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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/*
* @ test
* @ bug 8030099
* @ summary Memory usage of java process increases
after calling Win32ShellFolder : listFiles
multiple times on some directory with
large number of files / folders
* @ modules java . desktop / sun . awt . shell
* @ requires ( os . family = = " windows " )
* @ run main / timeout = 1000 ShellFolderMemoryLeak
*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.logging.Level;
import java.util.logging.Logger;
import sun.awt.shell.ShellFolder;
public class ShellFolderMemoryLeak {
private final static String tempDir = System.getProperty("java.io.tmpdir" );
private static Process process;
public static void main(String[] args) throws Exception {
if (args.length == 0 ) {
boolean testResultParallel
= createChildProcessWithParallelCollector();
String result = "" ;
if (!testResultParallel) {
result = "Test failed with Parallel collector" ;
}
boolean testResultDefault
= createChildProcessWithDefaultCollector();
if (!testResultDefault && !testResultParallel) {
result += " and with default collector both." ;
} else if (!testResultDefault) {
result = "Test failed with default collector" ;
}
if (!"" .equals(result)) {
throw new RuntimeException(result);
}
} else {
testListFile(args[args.length - 1 ]);
}
}
public static boolean createChildProcessWithDefaultCollector()
throws Exception {
String testDirectory = "TestDirectory1" ;
testDirectory = tempDir + testDirectory +File.separator;
createTestData(testDirectory);
return runProcess("" , testDirectory);
}
public static boolean createChildProcessWithParallelCollector()
throws Exception {
String testDirectory = "TestDirectory2" ;
testDirectory = tempDir + testDirectory +File.separator;
createTestData(testDirectory);
return runProcess(" -XX:+UseParallelGC" , testDirectory);
}
public static boolean runProcess(String arg1, String arg2) throws Exception {
String javaPath = System.getProperty("java.home" );
String classPathDir = System.getProperty("java.class.path" );
//creating java process which run same class with different Xmx value
String command = javaPath + File.separator + "bin" + File.separator
+ "java -Xmx256M" + arg1 + " -cp "
+ classPathDir
+ " --add-exports=java.desktop/sun.awt.shell=ALL-UNNAMED"
+ " ShellFolderMemoryLeak " + arg2;
process = Runtime.getRuntime().exec(command);
BufferedReader input = null ;
InputStream errorStream = null ;
String line = null ;
try {
int exitVal = process.waitFor();
input = new BufferedReader(new InputStreamReader(
process.getInputStream()));
while ((line = input.readLine()) != null ) {
}
errorStream = process.getErrorStream();
if (checkExceptions(errorStream) || exitVal != 0 ) {
return false ;
}
} catch (IllegalThreadStateException e) {
throw new RuntimeException(e);
} finally {
if (input != null ) {
input.close();
}
if (errorStream != null ) {
errorStream.close();
}
process.destroy();
}
return true ;
}
public static boolean checkExceptions(InputStream in) throws IOException {
String tempString;
int count = in.available();
boolean exception = false ;
while (count > 0 ) {
byte [] b = new byte [count];
in.read(b);
tempString = new String(b);
if (!exception) {
exception = tempString.contains("RunTimeException" );
}
count = in.available();
}
return exception;
}
private static void createTestData(String testDirectory) {
String folder = "folder_" ;
File testFolder = new File(testDirectory);
if (testFolder.exists()) {
clearTestData(testDirectory);
} else {
if (testFolder.mkdir()) {
for (int inx = 0 ; inx < 100 ; inx++) {
new File(testFolder + File.separator + folder + inx).mkdir();
}
} else {
throw new RuntimeException("Failed to create testDirectory" );
}
}
}
public static void deleteDirectory(File file)
throws IOException {
if (file.isDirectory()) {
if (file.list().length == 0 ) {
file.delete ();
} else {
String files[] = file.list();
for (String temp : files) {
File fileDelete = new File(file, temp);
deleteDirectory(fileDelete);
}
if (file.list().length == 0 ) {
file.delete ();
}
}
}
}
private static void testListFile(String testDirectory) {
try {
int mb = 1024 * 1024 ;
ShellFolder folder = ShellFolder.getShellFolder(
new File(testDirectory));
Runtime instance = Runtime.getRuntime();
//Memory used before calling listFiles
long startmem = instance.totalMemory() - instance.freeMemory();
long start = System.currentTimeMillis();
long endmem = 0 ;
//Calling listFiles for 5 minutes with sleep of 10 ms.
while ((System.currentTimeMillis() - start) < 300000 ) {
try {
folder.listFiles();
Thread .sleep(10 );
endmem = instance.totalMemory() - instance.freeMemory();
} catch (InterruptedException ex) {
Logger.getLogger(ShellFolderMemoryLeak.class .getName())
.log(Level.SEVERE, "InterruptedException" , ex);
}
}
//Total increase in memory after 5 minutes
long result = (endmem - startmem) / mb;
if (result > 100 ) {
clearTestData(testDirectory);
throw new RuntimeException("Test Failed" );
}
clearTestData(testDirectory);
} catch (FileNotFoundException ex) {
if (process != null && process.isAlive()) {
process.destroy();
}
Logger.getLogger(ShellFolderMemoryLeak.class .getName())
.log(Level.SEVERE, "File Not Found Exception" , ex);
}
}
private static void clearTestData(String testDirectory) {
File testFolder = new File(testDirectory);
try {
deleteDirectory(testFolder);
} catch (IOException ex) {
Logger.getLogger(ShellFolderMemoryLeak.class .getName())
.log(Level.SEVERE, "Unable to delete files" , ex);
}
}
}
Messung V0.5 in Prozent C=95 H=78 G=86
¤ Dauer der Verarbeitung: 0.5 Sekunden
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