view src/hotspot/share/jfr/leakprofiler/utilities/saveRestore.hpp @ 57734:ed8e7bf32188

8236859: WebSocket over authenticating proxy fails with NPE Summary: This change fixes several issues with WebSocket and proxy authentication. The AuthenticationFilter is changed to support an authenticating server accessed through an authenticating proxy. MultiExchange is fixed to close the previous connection if a new connection is necessary to establish the websocket (websocket connections are not cached and must be closed in that case). WebSocket OpeningHandshake is fixed to close the connection (without creating the RawChannel) if the opening handshake doesn't result in 101 upgrade protocol. Reviewed-by: prappo, chegar
author dfuchs
date Fri, 17 Jan 2020 17:55:06 +0000
parents 90ead0febf56
children
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/*
 * Copyright (c) 2017, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_JFR_LEAKPROFILER_UTILITIES_SAVERESTORE_HPP
#define SHARE_JFR_LEAKPROFILER_UTILITIES_SAVERESTORE_HPP

#include "memory/allocation.hpp"
#include "memory/iterator.hpp"
#include "oops/markWord.hpp"
#include "utilities/growableArray.hpp"

template <typename T, typename Impl>
class SaveRestore {
 private:
  Impl _impl;
 public:
  SaveRestore() : _impl() {
    _impl.setup();
  }

  void save(T const& value) {
    _impl.save(value);
  }

  ~SaveRestore() {
    _impl.restore();
  }
};

template <typename T, typename Context>
class ContextStore {
private:
  GrowableArray<Context>* _storage;
public:
  ContextStore() : _storage(NULL) {}

  void setup() {
    assert(_storage == NULL, "invariant");
    _storage = new GrowableArray<Context>(16);
  }

  void save(T const& value) {
    _storage->push(Context(value));
  }

  void restore() {
    for (int i = 0; i < _storage->length(); ++i) {
      _storage->at(i).~Context();
    }
  }
};

/*
* This class will save the original mark oop of an object sample object.
* It will then install an "identifier" mark oop to be used for
* identification purposes in the search for reference chains.
* The destructor will restore the original mark oop.
*/

class MarkWordContext {
 private:
  oop _obj;
  markWord _mark_word;
  void swap(MarkWordContext& rhs);
 public:
  MarkWordContext();
  MarkWordContext(const oop obj);
  MarkWordContext(const MarkWordContext& rhs);
  void operator=(MarkWordContext rhs);
  ~MarkWordContext();
};

typedef SaveRestore<oop, ContextStore<oop, MarkWordContext> > SaveRestoreMarkWords;

class ClassLoaderData;

class CLDClaimContext {
 private:
  ClassLoaderData* _cld;
  void swap(CLDClaimContext& rhs);
 public:
  CLDClaimContext();
  CLDClaimContext(ClassLoaderData* cld);
  CLDClaimContext(const CLDClaimContext& rhs);
  void operator=(CLDClaimContext rhs);
  ~CLDClaimContext();
};

typedef SaveRestore<ClassLoaderData*, ContextStore<ClassLoaderData*, CLDClaimContext> > SaveRestoreCLDClaimState;

class CLDClaimStateClosure : public CLDClosure {
 private:
  SaveRestoreCLDClaimState _state;
 public:
  CLDClaimStateClosure();
  void do_cld(ClassLoaderData* cld);
};

class SaveRestoreCLDClaimBits : public StackObj {
 private:
  CLDClaimStateClosure _claim_state_closure;
 public:
  SaveRestoreCLDClaimBits();
  ~SaveRestoreCLDClaimBits();
};

#endif // SHARE_JFR_LEAKPROFILER_UTILITIES_SAVERESTORE_HPP