96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/*
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* Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_PRIMS_JVMTIUTIL_HPP
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#define SHARE_VM_PRIMS_JVMTIUTIL_HPP
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#include "jvmtifiles/jvmti.h"
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#include "memory/resourceArea.hpp"
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#include "prims/jvmtiEventController.hpp"
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///////////////////////////////////////////////////////////////
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//
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// class JvmtiUtil
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//
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// class for miscellaneous jvmti utility static methods
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//
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class JvmtiUtil : AllStatic {
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static ResourceArea* _single_threaded_resource_area;
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static const char* _error_names[];
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static const bool _event_threaded[];
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public:
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static ResourceArea* single_threaded_resource_area();
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static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking
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static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr);
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static const bool event_threaded(int num) {
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if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
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return _event_threaded[num];
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}
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if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) {
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return false;
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}
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ShouldNotReachHere();
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return false;
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}
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};
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///////////////////////////////////////////////////////////////
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//
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// class SafeResourceMark
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//
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// ResourceMarks that work before threads exist
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//
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class SafeResourceMark : public ResourceMark {
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ResourceArea* safe_resource_area() {
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Thread* thread;
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if (Threads::number_of_threads() == 0) {
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return JvmtiUtil::single_threaded_resource_area();
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}
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thread = Thread::current_or_null();
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if (thread == NULL) {
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return JvmtiUtil::single_threaded_resource_area();
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}
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return thread->resource_area();
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}
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public:
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SafeResourceMark() : ResourceMark(safe_resource_area()) {}
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};
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#endif // SHARE_VM_PRIMS_JVMTIUTIL_HPP
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