Mercurial > hg > truffle
view src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Thu, 20 Nov 2008 16:56:09 -0800 |
parents | a61af66fc99e |
children | c3a720eefe82 |
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/* * Copyright 2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ #ifdef AMD64 typedef unsigned char UBYTE; #define UNW_FLAG_EHANDLER 0x01 #define UNW_FLAG_UHANDLER 0x02 #define UNW_FLAG_CHAININFO 0x04 // This structure is used to define an UNWIND_INFO that // only has an ExceptionHandler. There are no UnwindCodes // declared. typedef struct _UNWIND_INFO_EH_ONLY { UBYTE Version : 3; UBYTE Flags : 5; UBYTE SizeOfProlog; UBYTE CountOfCodes; UBYTE FrameRegister : 4; UBYTE FrameOffset : 4; union { OPTIONAL ULONG ExceptionHandler; OPTIONAL ULONG FunctionEntry; }; OPTIONAL ULONG ExceptionData[1]; } UNWIND_INFO_EH_ONLY, *PUNWIND_INFO_EH_ONLY; /* typedef struct _RUNTIME_FUNCTION { ULONG BeginAddress; ULONG EndAddress; ULONG UnwindData; } RUNTIME_FUNCTION, *PRUNTIME_FUNCTION; */ typedef struct _DISPATCHER_CONTEXT { ULONG64 ControlPc; ULONG64 ImageBase; PRUNTIME_FUNCTION FunctionEntry; ULONG64 EstablisherFrame; ULONG64 TargetIp; PCONTEXT ContextRecord; // PEXCEPTION_ROUTINE LanguageHandler; char * LanguageHandler; // double dependency problem PVOID HandlerData; } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT; typedef EXCEPTION_DISPOSITION (*PEXCEPTION_ROUTINE) ( IN PEXCEPTION_RECORD ExceptionRecord, IN ULONG64 EstablisherFrame, IN OUT PCONTEXT ContextRecord, IN OUT PDISPATCHER_CONTEXT DispatcherContext ); #endif // AMD64