Mercurial > hg > truffle
view src/share/vm/utilities/preserveException.hpp @ 7196:2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
Summary: keep an (almost) accurate running count of the reachable (live) flow graph nodes.
Reviewed-by: kvn, twisti, jrose, vlivanov
author | bharadwaj |
---|---|
date | Tue, 27 Nov 2012 17:24:15 -0800 |
parents | f08d439fab8c |
children | f34d701e952e |
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/* * Copyright (c) 1998, 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_UTILITIES_PRESERVEEXCEPTION_HPP #define SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP #include "runtime/handles.hpp" #ifdef TARGET_OS_FAMILY_linux # include "thread_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "thread_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "thread_windows.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_bsd # include "thread_bsd.inline.hpp" #endif // This file provides more support for exception handling; see also exceptions.hpp class PreserveExceptionMark { private: Thread* _thread; Handle _preserved_exception_oop; int _preserved_exception_line; const char* _preserved_exception_file; public: PreserveExceptionMark(Thread*& thread); ~PreserveExceptionMark(); }; // This is a clone of PreserveExceptionMark which asserts instead // of failing when what it wraps generates a pending exception. // It also addresses bug 6431341. class CautiouslyPreserveExceptionMark { private: Thread* _thread; Handle _preserved_exception_oop; int _preserved_exception_line; const char* _preserved_exception_file; public: CautiouslyPreserveExceptionMark(Thread* thread); ~CautiouslyPreserveExceptionMark(); }; // Like PreserveExceptionMark but allows new exceptions to be generated in // the body of the mark. If a new exception is generated then the original one // is discarded. class WeakPreserveExceptionMark { private: Thread* _thread; Handle _preserved_exception_oop; int _preserved_exception_line; const char* _preserved_exception_file; void preserve(); void restore(); public: WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() { if (pThread->has_pending_exception()) { preserve(); } } ~WeakPreserveExceptionMark() { if (_preserved_exception_oop.not_null()) { restore(); } } }; // use global exception mark when allowing pending exception to be set and // saving and restoring them #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD); #endif // SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP