duke@435: /*
stefank@2314:  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_PRIMS_JVMTIUTIL_HPP
stefank@2314: #define SHARE_VM_PRIMS_JVMTIUTIL_HPP
stefank@2314: 
stefank@2314: #include "jvmtifiles/jvmti.h"
stefank@2314: #include "memory/resourceArea.hpp"
stefank@2314: #include "prims/jvmtiEventController.hpp"
stefank@2314: 
duke@435: ///////////////////////////////////////////////////////////////
duke@435: //
duke@435: // class JvmtiUtil
duke@435: //
duke@435: // class for miscellaneous jvmti utility static methods
duke@435: //
duke@435: 
duke@435: class JvmtiUtil : AllStatic {
duke@435: 
duke@435:   static ResourceArea* _single_threaded_resource_area;
duke@435: 
duke@435:   static const char* _error_names[];
duke@435:   static const bool  _event_threaded[];
duke@435: 
duke@435: public:
duke@435: 
duke@435:   static ResourceArea* single_threaded_resource_area();
duke@435: 
duke@435:   static const char* error_name(int num)    { return _error_names[num]; }    // To Do: add range checking
duke@435: 
duke@435:   static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr);
duke@435: 
duke@435:   static const bool  event_threaded(int num) {
duke@435:     if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
duke@435:       return _event_threaded[num];
duke@435:     }
duke@435:     if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) {
duke@435:       return false;
duke@435:     }
duke@435:     ShouldNotReachHere();
duke@435:     return false;
duke@435:   }
duke@435: };
duke@435: 
duke@435: 
duke@435: ///////////////////////////////////////////////////////////////
duke@435: //
duke@435: // class SafeResourceMark
duke@435: //
duke@435: // ResourceMarks that work before threads exist
duke@435: //
duke@435: 
duke@435: class SafeResourceMark : public ResourceMark {
duke@435: 
duke@435:   ResourceArea* safe_resource_area() {
duke@435:     Thread* thread;
duke@435: 
duke@435:     if (Threads::number_of_threads() == 0) {
duke@435:       return JvmtiUtil::single_threaded_resource_area();
duke@435:     }
duke@435:     thread = ThreadLocalStorage::thread();
duke@435:     if (thread == NULL) {
duke@435:       return JvmtiUtil::single_threaded_resource_area();
duke@435:     }
duke@435:     return thread->resource_area();
duke@435:   }
duke@435: 
duke@435:  public:
duke@435: 
duke@435:   SafeResourceMark() : ResourceMark(safe_resource_area()) {}
duke@435: 
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_PRIMS_JVMTIUTIL_HPP