Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/code/CodeBlob.java @ 554:78144dc3db03
Merge
author | never |
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date | Tue, 13 Jan 2009 14:02:19 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 1a5913bf5e19 |
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/* * Copyright 2000-2005 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.code; import java.io.*; import java.util.*; import sun.jvm.hotspot.asm.x86.*; 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 instructionsOffsetField; private static CIntegerField frameCompleteOffsetField; private static CIntegerField dataOffsetField; private static CIntegerField oopsOffsetField; private static CIntegerField oopsLengthField; 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"); instructionsOffsetField = type.getCIntegerField("_instructions_offset"); dataOffsetField = type.getCIntegerField("_data_offset"); oopsOffsetField = type.getCIntegerField("_oops_offset"); oopsLengthField = type.getCIntegerField("_oops_length"); 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; } // 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; } // 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 instructionsBegin() { return headerBegin().addOffsetTo(instructionsOffsetField.getValue(addr)); } public Address instructionsEnd() { return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); } public Address dataBegin() { return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); } public Address dataEnd() { return headerBegin().addOffsetTo(sizeField.getValue(addr)); } public Address oopsBegin() { return headerBegin().addOffsetTo(oopsOffsetField.getValue(addr)); } public Address oopsEnd() { return oopsBegin().addOffsetTo(getOopsLength()); } // Offsets public int getRelocationOffset() { return (int) headerSizeField.getValue(addr); } public int getInstructionsOffset() { return (int) instructionsOffsetField.getValue(addr); } public int getDataOffset() { return (int) dataOffsetField.getValue(addr); } public int getOopsOffset() { return (int) oopsOffsetField.getValue(addr); } // Sizes public int getSize() { return (int) sizeField.getValue(addr); } public int getHeaderSize() { return (int) headerSizeField.getValue(addr); } // FIXME: add getRelocationSize() public int getInstructionsSize() { return (int) instructionsEnd().minus(instructionsBegin()); } 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 instructionsContains(Address addr) { return instructionsBegin().lessThanOrEqual(addr) && instructionsEnd().greaterThan(addr); } public boolean dataContains(Address addr) { return dataBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); } public boolean oopsContains(Address addr) { return oopsBegin().lessThanOrEqual(addr) && oopsEnd().greaterThan(addr); } public boolean contains(Address addr) { return instructionsContains(addr); } public boolean isFrameCompleteAt(Address a) { return instructionsContains(a) && a.minus(instructionsBegin()) >= frameCompleteOffsetField.getValue(addr); } /** Support for oops in scopes and relocs. Note: index 0 is reserved for null. */ public OopHandle getOopAt(int index) { if (index == 0) return null; if (Assert.ASSERTS_ENABLED) { Assert.that(index > 0 && index <= getOopsLength(), "must be a valid non-zero index"); } return oopsBegin().getOopHandleAt((index - 1) * VM.getVM().getOopSize()); } // 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 OopMapSet getOopMaps() { Address oopMapsAddr = oopMapsField.getValue(addr); if (oopMapsAddr == null) { return null; } return new OopMapSet(oopMapsAddr); } // FIXME: not yet implementable // void set_oop_maps(OopMapSet* p); public OopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) { Address pc = returnAddress; if (Assert.ASSERTS_ENABLED) { Assert.that(getOopMaps() != null, "nope"); } return getOopMaps().findMapAtOffset(pc.minus(instructionsBegin()), 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(JavaThread thread) { 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) { // FIXME: add relocation information tty.println(" instructions: [" + instructionsBegin() + ", " + instructionsEnd() + "), " + " data: [" + dataBegin() + ", " + dataEnd() + "), " + " oops: [" + oopsBegin() + ", " + oopsEnd() + "), " + " frame size: " + getFrameSize()); } //-------------------------------------------------------------------------------- // Internals only below this point // private int getOopsLength() { return (int) oopsLengthField.getValue(addr); } }