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view agent/src/share/classes/sun/jvm/hotspot/debugger/posix/DSO.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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/* * Copyright 2001-2003 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.debugger.posix; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.debugger.cdbg.*; import sun.jvm.hotspot.debugger.posix.elf.*; import sun.jvm.hotspot.utilities.memo.*; /** Provides a simple wrapper around the ELF library which handles relocation. */ public abstract class DSO implements LoadObject { private MemoizedObject file; // contains ELFFile private String filename; private Address addr; private long size; private IsDSO dso = new IsDSO(); class IsDSO extends MemoizedBoolean { protected boolean computeValue() { return getFile().getHeader().getFileType() == ELFHeader.FT_DYN; } }; class ELFFileByName extends MemoizedObject { protected Object computeValue() { return ELFFileParser.getParser().parse(DSO.this.filename); } }; class ELFFileByAddress extends MemoizedObject { protected Object computeValue() { return ELFFileParser.getParser().parse(new AddressDataSource(DSO.this.addr)); } }; public DSO(String filename, long size, Address relocation) throws ELFException { this.filename = filename; this.size = size; this.addr = relocation; this.file = new ELFFileByName(); } public DSO(long size, Address relocation) throws ELFException { this.addr = relocation; this.size = size; this.file = new ELFFileByAddress(); } public String getName() { return filename; } public Address getBase() { return addr; } /** if this .so is unloaded and re-loaded in the same process at a different base, change the base by calling this to avoid re-parsing the ELF. */ public void setBase(Address newBase) { addr = newBase; if (filename == null) { // ELFFile was created by address. we have to re-parse it. file = new ELFFileByAddress(); dso = new IsDSO(); } } public long getSize() { return size; } public CDebugInfoDataBase getDebugInfoDataBase() throws DebuggerException { // FIXME: after stabs parser return null; } public BlockSym debugInfoForPC(Address pc) throws DebuggerException { // FIXME: after stabs parser return null; } public ClosestSymbol closestSymbolToPC(Address pcAsAddr) throws DebuggerException { boolean dso = isDSO(); long offset = dso? pcAsAddr.minus(addr) : getAddressValue(pcAsAddr); ELFSymbol sym = getFile().getHeader().getELFSymbol(offset); return (sym != null)? createClosestSymbol(sym.getName(), offset - sym.getValue()) : null; } public LineNumberInfo lineNumberForPC(Address pc) throws DebuggerException { // FIXME: after stabs parser return null; } /** return true if file is a .so */ public boolean isDSO() { return dso.getValue(); } /** Look up a symbol; returns absolute address or null if symbol was not found. */ public Address lookupSymbol(String symbol) throws ELFException { ELFSymbol sym = getFile().getHeader().getELFSymbol(symbol); if (sym == null) { return null; } long value = sym.getValue(); if (isDSO()) { return addr.addOffsetTo(value); } else { return newAddress(value); } } public boolean equals(Object o) { if (o == null || !(o instanceof DSO)) { return false; } DSO other = (DSO)o; return getBase().equals(other.getBase()); } public int hashCode() { return getBase().hashCode(); } protected ELFFile getFile() { return (ELFFile) file.getValue(); } protected abstract Address newAddress(long addr); protected abstract long getAddressValue(Address addr); protected ClosestSymbol createClosestSymbol(String name, long diff) { return new ClosestSymbol(name, diff); } }