Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/runtime/StubRoutines.java @ 931:72088be4b386
6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit
Summary: use PcDesc to keep record of the reexecute bit instead of using DebugInfoStreams
Reviewed-by: kvn, never, twisti
author | cfang |
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date | Thu, 20 Aug 2009 12:42:57 -0700 |
parents | bd02caa94611 |
children | c18cbe5936b8 |
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/* * Copyright 2000-2009 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. * */ package sun.jvm.hotspot.runtime; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; /** Very minimal port for now to get frames working */ public class StubRoutines { private static AddressField callStubReturnAddressField; private static AddressField callStubCompiledReturnAddressField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("StubRoutines"); callStubReturnAddressField = type.getAddressField("_call_stub_return_address"); // Only some platforms have specific return from compiled to call_stub try { type = db.lookupType("StubRoutines::x86"); if (type != null) { callStubCompiledReturnAddressField = type.getAddressField("_call_stub_compiled_return"); } } catch (RuntimeException re) { callStubCompiledReturnAddressField = null; } if (callStubCompiledReturnAddressField == null && VM.getVM().getCPU().equals("x86")) { throw new InternalError("Missing definition for _call_stub_compiled_return"); } } public StubRoutines() { } public boolean returnsToCallStub(Address returnPC) { Address addr = callStubReturnAddressField.getValue(); boolean result = false; if (addr == null) { result = (addr == returnPC); } else { result = addr.equals(returnPC); } if (result || callStubCompiledReturnAddressField == null ) return result; // Could be a return to compiled code return point addr = callStubCompiledReturnAddressField.getValue(); if (addr == null) { return (addr == returnPC); } else { return (addr.equals(returnPC)); } } }