JDK14/Java14源码在线阅读

/*
 * Copyright (c) 1998, 2019, 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
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#ifndef SHARE_RUNTIME_MEMPROFILER_HPP
#define SHARE_RUNTIME_MEMPROFILER_HPP

// Prints periodic memory usage trace of HotSpot VM

class MemProfilerTask;

class MemProfiler : AllStatic {
 friend class MemProfilerTask;
 private:
  static MemProfilerTask* _task;
  static FILE* _log_fp;
  // Do trace (callback from MemProfilerTask and from disengage)
  static void do_trace()      PRODUCT_RETURN;
 public:
  // Start/stop the profiler

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