| /* |
| * Copyright (c) 2014, 2015, 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. |
| */ |
| package jdk.vm.ci.common; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * A facility for timing a step in the runtime initialization sequence. This is independent from all |
| * other JVMCI code so as to not perturb the initialization sequence. It is enabled by setting the |
| * {@code "jvmci.inittimer"} system property to {@code "true"}. |
| */ |
| public final class InitTimer implements AutoCloseable { |
| private final String name; |
| private final long start; |
| |
| private InitTimer(String name) { |
| int n = nesting.getAndIncrement(); |
| if (n == 0) { |
| initializingThread = Thread.currentThread(); |
| System.out.println("INITIALIZING THREAD: " + initializingThread); |
| } else { |
| assert Thread.currentThread() == initializingThread : Thread.currentThread() + " != " + initializingThread; |
| } |
| this.name = name; |
| this.start = System.currentTimeMillis(); |
| System.out.println("START: " + SPACES.substring(0, n * 2) + name); |
| } |
| |
| @SuppressFBWarnings(value = "ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD", justification = "only the initializing thread accesses this field") |
| public void close() { |
| final long end = System.currentTimeMillis(); |
| int n = nesting.decrementAndGet(); |
| System.out.println(" DONE: " + SPACES.substring(0, n * 2) + name + " [" + (end - start) + " ms]"); |
| if (n == 0) { |
| initializingThread = null; |
| } |
| } |
| |
| public static InitTimer timer(String name) { |
| return ENABLED ? new InitTimer(name) : null; |
| } |
| |
| public static InitTimer timer(String name, Object suffix) { |
| return ENABLED ? new InitTimer(name + suffix) : null; |
| } |
| |
| /** |
| * Specifies if initialization timing is enabled. Note: This property cannot use |
| * {@code HotSpotJVMCIRuntime.Option} since that class is not visible from this package. |
| */ |
| private static final boolean ENABLED = Boolean.getBoolean("jvmci.InitTimer"); |
| |
| public static final AtomicInteger nesting = ENABLED ? new AtomicInteger() : null; |
| public static final String SPACES = " "; |
| |
| /** |
| * Used to assert the invariant that all related initialization happens on the same thread. |
| */ |
| static Thread initializingThread; |
| } |