diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/hotspot/share/prims/jvmtiEventController.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/hotspot/share/prims/jvmtiEventController.hpp Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,245 @@ +/* + * 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