--- /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