jdk8-mips64-public/hotspot: src/share/vm/services/attachListener.hpp@f90c822e73f8 (annotated)

src/share/vm/services/attachListener.hpp@f90c822e73f8 (annotated)

src/share/vm/services/attachListener.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * Copyright (c) 2005, 2013, 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_VM_SERVICES_ATTACHLISTENER_HPP
 #define SHARE_VM_SERVICES_ATTACHLISTENER_HPP
 #include "memory/allocation.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/ostream.hpp"
 #include "utilities/macros.hpp"
 // The AttachListener thread services a queue of operations that are enqueued
 // by client tools. Each operation is identified by a name and has up to 3
 // arguments. The operation name is mapped to a function which performs the
 // operation. The function is called with an outputStream which is can use to
 // write any result data (for examples the properties command serializes
 // properties names and values to the output stream). When the function
 // complets the result value and any result data is returned to the client
 // tool.
 class AttachOperation;
 typedef jint (*AttachOperationFunction)(AttachOperation* op, outputStream* out);
 struct AttachOperationFunctionInfo {
   const char* name;
   AttachOperationFunction func;
 };
 class AttachListener: AllStatic {
  public:
   static void vm_start() NOT_SERVICES_RETURN;
   static void init()  NOT_SERVICES_RETURN;
   static void abort() NOT_SERVICES_RETURN;
   // invoke to perform clean-up tasks when all clients detach
   static void detachall() NOT_SERVICES_RETURN;
   // indicates if the Attach Listener needs to be created at startup
   static bool init_at_startup() NOT_SERVICES_RETURN_(false);
   // indicates if we have a trigger to start the Attach Listener
   static bool is_init_trigger() NOT_SERVICES_RETURN_(false);
 #if !INCLUDE_SERVICES
   static bool is_attach_supported()             { return false; }
 #else
  private:
   static volatile bool _initialized;
  public:
   static bool is_initialized()                  { return _initialized; }
   static void set_initialized()                 { _initialized = true; }
   // indicates if this VM supports attach-on-demand
   static bool is_attach_supported()             { return !DisableAttachMechanism; }
   // platform specific initialization
   static int pd_init();
   // platform specific operation
   static AttachOperationFunctionInfo* pd_find_operation(const char* name);
   // platform specific flag change
   static jint pd_set_flag(AttachOperation* op, outputStream* out);
   // platform specific detachall
   static void pd_detachall();
   // platform specific data dump
   static void pd_data_dump();
   // dequeue the next operation
   static AttachOperation* dequeue();
 #endif // !INCLUDE_SERVICES
 };
 #if INCLUDE_SERVICES
 class AttachOperation: public CHeapObj<mtInternal> {
  public:
   enum {
     name_length_max = 16,       // maximum length of  name
     arg_length_max = 1024,      // maximum length of argument
     arg_count_max = 3           // maximum number of arguments
   };
   // name of special operation that can be enqueued when all
   // clients detach
   static char* detachall_operation_name() { return (char*)"detachall"; }
  private:
   char _name[name_length_max+1];
   char _arg[arg_count_max][arg_length_max+1];
  public:
   const char* name() const                      { return _name; }
   // set the operation name
   void set_name(char* name) {
     assert(strlen(name) <= name_length_max, "exceeds maximum name length");
     strcpy(_name, name);
   }
   // get an argument value
   const char* arg(int i) const {
     assert(i>=0 && i<arg_count_max, "invalid argument index");
     return _arg[i];
   }
   // set an argument value
   void set_arg(int i, char* arg) {
     assert(i>=0 && i<arg_count_max, "invalid argument index");
     if (arg == NULL) {
       _arg[i][0] = '\0';
     } else {
       assert(strlen(arg) <= arg_length_max, "exceeds maximum argument length");
       strcpy(_arg[i], arg);
     }
   }
   // create an operation of a given name
   AttachOperation(char* name) {
     set_name(name);
     for (int i=0; i<arg_count_max; i++) {
       set_arg(i, NULL);
     }
   }
   // complete operation by sending result code and any result data to the client
   virtual void complete(jint result, bufferedStream* result_stream) = 0;
 };
 #endif // INCLUDE_SERVICES
 #endif // SHARE_VM_SERVICES_ATTACHLISTENER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/attachListener.hpp@f90c822e73f8 (annotated)

src/share/vm/services/attachListener.hpp