/* * Copyright (c) 2000, 2012, 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. * */ package sun.jvm.hotspot.code; import java.io.*; import java.util.*; import sun.jvm.hotspot.compiler.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; public class CodeBlob extends VMObject { private static AddressField nameField; private static CIntegerField sizeField; private static CIntegerField headerSizeField; private static CIntegerField relocationSizeField; private static CIntegerField contentOffsetField; private static CIntegerField codeOffsetField; private static CIntegerField frameCompleteOffsetField; private static CIntegerField dataOffsetField; private static CIntegerField frameSizeField; private static AddressField oopMapsField; // Only used by server compiler on x86; computed over in SA rather // than relying on computation in target VM private static final int NOT_YET_COMPUTED = -2; private static final int UNDEFINED = -1; private int linkOffset = NOT_YET_COMPUTED; private static int matcherInterpreterFramePointerReg; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static void initialize(TypeDataBase db) { Type type = db.lookupType("CodeBlob"); nameField = type.getAddressField("_name"); sizeField = type.getCIntegerField("_size"); headerSizeField = type.getCIntegerField("_header_size"); relocationSizeField = type.getCIntegerField("_relocation_size"); frameCompleteOffsetField = type.getCIntegerField("_frame_complete_offset"); contentOffsetField = type.getCIntegerField("_content_offset"); codeOffsetField = type.getCIntegerField("_code_offset"); dataOffsetField = type.getCIntegerField("_data_offset"); frameSizeField = type.getCIntegerField("_frame_size"); oopMapsField = type.getAddressField("_oop_maps"); if (VM.getVM().isServerCompiler()) { matcherInterpreterFramePointerReg = db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue(); } } public CodeBlob(Address addr) { super(addr); } // Typing public boolean isBufferBlob() { return false; } public boolean isNMethod() { return false; } public boolean isRuntimeStub() { return false; } public boolean isDeoptimizationStub() { return false; } public boolean isUncommonTrapStub() { return false; } public boolean isExceptionStub() { return false; } public boolean isSafepointStub() { return false; } public boolean isAdapterBlob() { return false; } // Fine grain nmethod support: isNmethod() == isJavaMethod() || isNativeMethod() || isOSRMethod() public boolean isJavaMethod() { return false; } public boolean isNativeMethod() { return false; } /** On-Stack Replacement method */ public boolean isOSRMethod() { return false; } public NMethod asNMethodOrNull() { if (isNMethod()) return (NMethod)this; return null; } // Boundaries public Address headerBegin() { return addr; } public Address headerEnd() { return addr.addOffsetTo(headerSizeField.getValue(addr)); } // FIXME: add RelocInfo // public RelocInfo relocationBegin(); // public RelocInfo relocationEnd(); public Address contentBegin() { return headerBegin().addOffsetTo(contentOffsetField.getValue(addr)); } public Address contentEnd() { return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); } public Address codeBegin() { return headerBegin().addOffsetTo(contentOffsetField.getValue(addr)); } public Address codeEnd() { return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); } public Address dataBegin() { return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); } public Address dataEnd() { return headerBegin().addOffsetTo(sizeField.getValue(addr)); } // Offsets public int getRelocationOffset() { return (int) headerSizeField .getValue(addr); } public int getContentOffset() { return (int) contentOffsetField.getValue(addr); } public int getCodeOffset() { return (int) codeOffsetField .getValue(addr); } public int getDataOffset() { return (int) dataOffsetField .getValue(addr); } // Sizes public int getSize() { return (int) sizeField .getValue(addr); } public int getHeaderSize() { return (int) headerSizeField.getValue(addr); } // FIXME: add getRelocationSize() public int getContentSize() { return (int) contentEnd().minus(contentBegin()); } public int getCodeSize() { return (int) codeEnd() .minus(codeBegin()); } public int getDataSize() { return (int) dataEnd() .minus(dataBegin()); } // Containment public boolean blobContains(Address addr) { return headerBegin() .lessThanOrEqual(addr) && dataEnd() .greaterThan(addr); } // FIXME: add relocationContains public boolean contentContains(Address addr) { return contentBegin().lessThanOrEqual(addr) && contentEnd().greaterThan(addr); } public boolean codeContains(Address addr) { return codeBegin() .lessThanOrEqual(addr) && codeEnd() .greaterThan(addr); } public boolean dataContains(Address addr) { return dataBegin() .lessThanOrEqual(addr) && dataEnd() .greaterThan(addr); } public boolean contains(Address addr) { return contentContains(addr); } public boolean isFrameCompleteAt(Address a) { return codeContains(a) && a.minus(codeBegin()) >= frameCompleteOffsetField.getValue(addr); } // Reclamation support (really only used by the nmethods, but in order to get asserts to work // in the CodeCache they are defined virtual here) public boolean isZombie() { return false; } public boolean isLockedByVM() { return false; } /** OopMap for frame; can return null if none available */ public ImmutableOopMapSet getOopMaps() { Address oopMapsAddr = oopMapsField.getValue(addr); if (oopMapsAddr == null) { return null; } return new ImmutableOopMapSet(oopMapsAddr); } // FIXME: not yet implementable // void set_oop_maps(ImmutableOopMapSet* p); public ImmutableOopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) { Address pc = returnAddress; if (Assert.ASSERTS_ENABLED) { Assert.that(getOopMaps() != null, "nope"); } return getOopMaps().findMapAtOffset(pc.minus(codeBegin()), debugging); } // virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, void f(oop*)) { ShouldNotReachHere(); } // FIXME; /** NOTE: this returns a size in BYTES in this system! */ public long getFrameSize() { return VM.getVM().getAddressSize() * frameSizeField.getValue(addr); } // Returns true, if the next frame is responsible for GC'ing oops passed as arguments public boolean callerMustGCArguments() { return false; } public String getName() { return CStringUtilities.getString(nameField.getValue(addr)); } // FIXME: NOT FINISHED // FIXME: add more accessors public void print() { printOn(System.out); } public void printOn(PrintStream tty) { tty.print(getName()); printComponentsOn(tty); } protected void printComponentsOn(PrintStream tty) { tty.println(" content: [" + contentBegin() + ", " + contentEnd() + "), " + " code: [" + codeBegin() + ", " + codeEnd() + "), " + " data: [" + dataBegin() + ", " + dataEnd() + "), " + " frame size: " + getFrameSize()); } }