--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/posix/DSO.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,160 @@
+/*
+ * 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);
+    }
+}