diff a/test/jdk/java/lang/ProcessBuilder/checkHandles/CheckHandles.java b/test/jdk/java/lang/ProcessBuilder/checkHandles/CheckHandles.java --- /dev/null +++ b/test/jdk/java/lang/ProcessBuilder/checkHandles/CheckHandles.java @@ -0,0 +1,105 @@ +/* + * Copyright (c) 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. + * + * 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. + */ + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.lang.ProcessHandle; + +/* + * @test + * @bug 8239893 + * @summary Verify that handles for processes that terminate do not accumulate + * @requires (os.family == "windows") + * @run main/native CheckHandles + */ +public class CheckHandles { + + // Return the current process handle count + private static native long getProcessHandleCount(); + + public static void main(String[] args) throws Exception { + System.loadLibrary("CheckHandles"); + + System.out.println("mypid: " + ProcessHandle.current().pid()); + long minHandles = Long.MAX_VALUE; + long maxHandles = 0L; + int MAX_SPAWN = 50; + for (int i = 0; i < MAX_SPAWN; i++) { + try { + Process testProcess = new ProcessBuilder("cmd", "/c", "dir").start(); + + Thread outputConsumer = new Thread(() -> consumeStream(testProcess.pid(), testProcess.getInputStream())); + outputConsumer.setDaemon(true); + outputConsumer.start(); + Thread errorConsumer = new Thread(() -> consumeStream(testProcess.pid(), testProcess.getErrorStream())); + errorConsumer.setDaemon(true); + errorConsumer.start(); + + testProcess.waitFor(); + System.gc(); + outputConsumer.join(); + errorConsumer.join(); + long count = getProcessHandleCount(); + if (count < 0) + throw new AssertionError("getProcessHandleCount failed"); + minHandles = Math.min(minHandles, count); + maxHandles = Math.max(maxHandles, count); + } catch (IOException | InterruptedException e) { + e.printStackTrace(); + throw e; + } + } + final long ERROR_PERCENT = 10; + final long ERROR_THRESHOLD = // 10% increase over min to passing max + minHandles + ((minHandles + ERROR_PERCENT - 1) / ERROR_PERCENT); + if (maxHandles >= ERROR_THRESHOLD) { + System.out.println("Processes started: " + MAX_SPAWN); + System.out.println("minhandles: " + minHandles); + System.out.println("maxhandles: " + maxHandles); + throw new AssertionError("Handle use increased by more than " + ERROR_PERCENT + " percent."); + } + } + + private static void consumeStream(long pid, InputStream inputStream) { + BufferedReader reader = null; + try { + int lines = 0; + reader = new BufferedReader(new InputStreamReader(inputStream)); + while (reader.readLine() != null) { + lines++; + } + } catch (IOException e) { + e.printStackTrace(); + } finally { + if (reader != null) { + try { + reader.close(); + } catch (IOException e) { + e.printStackTrace(); + } + } + } + } +}