1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/prims/jvmtiUtil.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,95 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_PRIMS_JVMTIUTIL_HPP
1.29 +#define SHARE_VM_PRIMS_JVMTIUTIL_HPP
1.30 +
1.31 +#include "jvmtifiles/jvmti.h"
1.32 +#include "memory/resourceArea.hpp"
1.33 +#include "prims/jvmtiEventController.hpp"
1.34 +
1.35 +///////////////////////////////////////////////////////////////
1.36 +//
1.37 +// class JvmtiUtil
1.38 +//
1.39 +// class for miscellaneous jvmti utility static methods
1.40 +//
1.41 +
1.42 +class JvmtiUtil : AllStatic {
1.43 +
1.44 + static ResourceArea* _single_threaded_resource_area;
1.45 +
1.46 + static const char* _error_names[];
1.47 + static const bool _event_threaded[];
1.48 +
1.49 +public:
1.50 +
1.51 + static ResourceArea* single_threaded_resource_area();
1.52 +
1.53 + static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking
1.54 +
1.55 + static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr);
1.56 +
1.57 + static const bool event_threaded(int num) {
1.58 + if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
1.59 + return _event_threaded[num];
1.60 + }
1.61 + if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) {
1.62 + return false;
1.63 + }
1.64 + ShouldNotReachHere();
1.65 + return false;
1.66 + }
1.67 +};
1.68 +
1.69 +
1.70 +///////////////////////////////////////////////////////////////
1.71 +//
1.72 +// class SafeResourceMark
1.73 +//
1.74 +// ResourceMarks that work before threads exist
1.75 +//
1.76 +
1.77 +class SafeResourceMark : public ResourceMark {
1.78 +
1.79 + ResourceArea* safe_resource_area() {
1.80 + Thread* thread;
1.81 +
1.82 + if (Threads::number_of_threads() == 0) {
1.83 + return JvmtiUtil::single_threaded_resource_area();
1.84 + }
1.85 + thread = ThreadLocalStorage::thread();
1.86 + if (thread == NULL) {
1.87 + return JvmtiUtil::single_threaded_resource_area();
1.88 + }
1.89 + return thread->resource_area();
1.90 + }
1.91 +
1.92 + public:
1.93 +
1.94 + SafeResourceMark() : ResourceMark(safe_resource_area()) {}
1.95 +
1.96 +};
1.97 +
1.98 +#endif // SHARE_VM_PRIMS_JVMTIUTIL_HPP
