jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiEventController.hpp@eef07cd490d4 (annotated)

src/share/vm/prims/jvmtiEventController.hpp@eef07cd490d4 (annotated)

src/share/vm/prims/jvmtiEventController.hpp

Wed, 03 Jul 2019 20:42:37 +0800

author: aoqi
date: Wed, 03 Jul 2019 20:42:37 +0800
changeset 9637: eef07cd490d4
parent 6876: 710a3c8b516e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 2003, 2010, 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_PRIMS_JVMTIEVENTCONTROLLER_HPP
 #define SHARE_VM_PRIMS_JVMTIEVENTCONTROLLER_HPP
 #include "jvmtifiles/jvmti.h"
 #include "memory/allocation.hpp"
 #include "memory/allocation.inline.hpp"
 #include "utilities/globalDefinitions.hpp"
 // forward declaration
 class JvmtiEventControllerPrivate;
 class JvmtiEventController;
 class JvmtiEnvThreadState;
 class JvmtiFramePop;
 class JvmtiEnvBase;
 // Extension event support
 //
 // jvmtiExtEvent is the extensions equivalent of jvmtiEvent
 // jvmtiExtCallbacks is the extensions equivalent of jvmtiEventCallbacks
 // Extension events start JVMTI_MIN_EVENT_TYPE_VAL-1 and work towards 0.
 typedef enum {
   EXT_EVENT_CLASS_UNLOAD = JVMTI_MIN_EVENT_TYPE_VAL-1,
   EXT_MIN_EVENT_TYPE_VAL = EXT_EVENT_CLASS_UNLOAD,
   EXT_MAX_EVENT_TYPE_VAL = EXT_EVENT_CLASS_UNLOAD
 } jvmtiExtEvent;
 typedef struct {
   jvmtiExtensionEvent ClassUnload;
 } jvmtiExtEventCallbacks;
 // The complete range of events is EXT_MIN_EVENT_TYPE_VAL to
 // JVMTI_MAX_EVENT_TYPE_VAL (inclusive and contiguous).
 const int TOTAL_MIN_EVENT_TYPE_VAL = EXT_MIN_EVENT_TYPE_VAL;
 const int TOTAL_MAX_EVENT_TYPE_VAL = JVMTI_MAX_EVENT_TYPE_VAL;
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiEventEnabled
 //
 // Utility class
 //
 // A boolean array indexed by event_type, used as an internal
 // data structure to track what JVMTI event types are enabled.
 // Used for user set enabling and disabling (globally and on a
 // per thread basis), and for computed merges across environments,
 // threads and the VM as a whole.
 //
 // for inlines see jvmtiEventController_inline.hpp
 //
 class JvmtiEventEnabled VALUE_OBJ_CLASS_SPEC {
 private:
   friend class JvmtiEventControllerPrivate;
   jlong _enabled_bits;
 #ifndef PRODUCT
   enum {
     JEE_INIT_GUARD = 0xEAD0
   } _init_guard;
 #endif
   static jlong bit_for(jvmtiEvent event_type);
   jlong get_bits();
   void set_bits(jlong bits);
 public:
   JvmtiEventEnabled();
   void clear();
   bool is_enabled(jvmtiEvent event_type);
   void set_enabled(jvmtiEvent event_type, bool enabled);
 };
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiEnvThreadEventEnable
 //
 // JvmtiEventController data specific to a particular environment and thread.
 //
 // for inlines see jvmtiEventController_inline.hpp
 //
 class JvmtiEnvThreadEventEnable VALUE_OBJ_CLASS_SPEC {
 private:
   friend class JvmtiEventControllerPrivate;
   JvmtiEventEnabled _event_user_enabled;
   JvmtiEventEnabled _event_enabled;
 public:
   JvmtiEnvThreadEventEnable();
   ~JvmtiEnvThreadEventEnable();
   bool is_enabled(jvmtiEvent event_type);
   void set_user_enabled(jvmtiEvent event_type, bool enabled);
 };
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiThreadEventEnable
 //
 // JvmtiEventController data specific to a particular thread.
 //
 // for inlines see jvmtiEventController_inline.hpp
 //
 class JvmtiThreadEventEnable VALUE_OBJ_CLASS_SPEC {
 private:
   friend class JvmtiEventControllerPrivate;
   JvmtiEventEnabled _event_enabled;
 public:
   JvmtiThreadEventEnable();
   ~JvmtiThreadEventEnable();
   bool is_enabled(jvmtiEvent event_type);
 };
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiEnvEventEnable
 //
 // JvmtiEventController data specific to a particular environment.
 //
 // for inlines see jvmtiEventController_inline.hpp
 //
 class JvmtiEnvEventEnable VALUE_OBJ_CLASS_SPEC {
 private:
   friend class JvmtiEventControllerPrivate;
   // user set global event enablement indexed by jvmtiEvent
   JvmtiEventEnabled _event_user_enabled;
   // this flag indicates the presence (true) or absence (false) of event callbacks
   // it is indexed by jvmtiEvent
   JvmtiEventEnabled _event_callback_enabled;
   // indexed by jvmtiEvent true if enabled globally or on any thread.
   // True only if there is a callback for it.
   JvmtiEventEnabled _event_enabled;
 public:
   JvmtiEnvEventEnable();
   ~JvmtiEnvEventEnable();
   bool is_enabled(jvmtiEvent event_type);
   void set_user_enabled(jvmtiEvent event_type, bool enabled);
 };
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiEventController
 //
 // The class is the access point for all actions that change
 // which events are active, this include:
 //      enabling and disabling events
 //      changing the callbacks/eventhook (they may be null)
 //      setting and clearing field watchpoints
 //      setting frame pops
 //      encountering frame pops
 //
 // for inlines see jvmtiEventController_inline.hpp
 //
 class JvmtiEventController : AllStatic {
 private:
   friend class JvmtiEventControllerPrivate;
   // for all environments, global array indexed by jvmtiEvent
   static JvmtiEventEnabled _universal_global_event_enabled;
 public:
   static bool is_enabled(jvmtiEvent event_type);
   // events that can ONLY be enabled/disabled globally (can't toggle on individual threads).
   static bool is_global_event(jvmtiEvent event_type);
   // is the event_type valid?
   // to do: check against valid event array
   static bool is_valid_event_type(jvmtiEvent event_type) {
     return ((int)event_type >= TOTAL_MIN_EVENT_TYPE_VAL)
         && ((int)event_type <= TOTAL_MAX_EVENT_TYPE_VAL);
   }
   // Use (thread == NULL) to enable/disable an event globally.
   // Use (thread != NULL) to enable/disable an event for a particular thread.
   // thread is ignored for events that can only be specified globally
   static void set_user_enabled(JvmtiEnvBase *env, JavaThread *thread,
                                jvmtiEvent event_type, bool enabled);
   // Setting callbacks changes computed enablement and must be done
   // at a safepoint otherwise a NULL callback could be attempted
   static void set_event_callbacks(JvmtiEnvBase *env,
                                   const jvmtiEventCallbacks* callbacks,
                                   jint size_of_callbacks);
   // Sets the callback function for a single extension event and enables
   // (or disables it).
   static void set_extension_event_callback(JvmtiEnvBase* env,
                                            jint extension_event_index,
                                            jvmtiExtensionEvent callback);
   static void set_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop);
   static void clear_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop);
   static void clear_to_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop);
   static void change_field_watch(jvmtiEvent event_type, bool added);
   static void thread_started(JavaThread *thread);
   static void thread_ended(JavaThread *thread);
   static void env_initialize(JvmtiEnvBase *env);
   static void env_dispose(JvmtiEnvBase *env);
   static void vm_start();
   static void vm_init();
   static void vm_death();
 };
 #endif // SHARE_VM_PRIMS_JVMTIEVENTCONTROLLER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvmtiEventController.hpp@eef07cd490d4 (annotated)

src/share/vm/prims/jvmtiEventController.hpp