Added support for extracting the list of source files from ELF-DWARF.

core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/debug/dwarf/Dwarf.java

@@ -163,6 +163,8 @@ public class Dwarf {
 
 	CompileUnit currentCU;
 
+	boolean printEnabled = true;
+	
 	public Dwarf(String file) throws IOException {
 		Elf exe = new Elf(file);
 		init(exe);
@@ -340,15 +342,18 @@ public class Dwarf {
 					header.abbreviationOffset = read_4_bytes(data, offset + 6);
 					header.addressSize = data[offset + 10];
 
-					System.out.println("Compilation Unit @ " + Long.toHexString(offset)); //$NON-NLS-1$
-					System.out.println(header);
+					if (printEnabled) {
+						System.out.println("Compilation Unit @ " + Long.toHexString(offset)); //$NON-NLS-1$
+						System.out.println(header);
+					}
 
 					// read the abbrev section.
 					InputStream in = new ByteArrayInputStream(data, offset + 11, length);
 					Map abbrevs = parseDebugAbbreviation(header);
 					parseDebugInfoEntry(requestor, in, abbrevs, header);
 
-					System.out.println();
+					if (printEnabled)
+						System.out.println();
 				}
 			} catch (IOException e) {
 				e.printStackTrace();
@@ -562,10 +567,13 @@ public class Dwarf {
 	void processDebugInfoEntry(IDebugEntryRequestor requestor, AbbreviationEntry entry, List list) {
 		int len = list.size();
 		int tag = (int) entry.tag;
-		System.out.println("Abbrev Number " + entry.code); //$NON-NLS-1$
+		if (printEnabled)
+			System.out.println("Abbrev Number " + entry.code); //$NON-NLS-1$
+		
 		for (int i = 0; i < len; i++) {
 			AttributeValue av = (AttributeValue) list.get(i);
-			System.out.println(av);
+			if (printEnabled)
+				System.out.println(av);
 			// We are only interrested in certain tags.
 			switch (tag) {
 				case DwarfConstants.DW_TAG_array_type :

core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/debug/dwarf/DwarfReader.java

@@ -0,0 +1,288 @@
+/*******************************************************************************
+ * Copyright (c) 2006 Nokia and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Nokia - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.cdt.utils.debug.dwarf;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.cdt.core.ISymbolReader;
+import org.eclipse.cdt.utils.debug.IDebugEntryRequestor;
+import org.eclipse.cdt.utils.elf.Elf;
+import org.eclipse.core.runtime.Path;
+
+/**
+ * Light-weight parser of Dwarf2 data which is intended for getting only 
+ * source files that contribute to the given executable.
+ */
+public class DwarfReader extends Dwarf implements ISymbolReader {
+
+	// These are sections that must be parsed to get the source file list.
+	final static String[] DWARF_SectionsToParse =
+		{
+			DWARF_DEBUG_INFO,
+			DWARF_DEBUG_LINE,
+			DWARF_DEBUG_ABBREV,
+			DWARF_DEBUG_STR
+		};
+
+	ArrayList		 	fileList;
+	String[] 			files = null;
+	boolean 			m_parsed = false;
+	private int 		m_leb128Size = 0;
+		
+	public DwarfReader(String file) throws IOException {
+		super(file);
+	}
+
+	public DwarfReader(Elf exe) throws IOException {
+		super(exe);
+	}
+
+	// Override parent.
+	// 
+	public void init(Elf exe) throws IOException {
+		Elf.ELFhdr header = exe.getELFhdr();
+		isLE = header.e_ident[Elf.ELFhdr.EI_DATA] == Elf.ELFhdr.ELFDATA2LSB;
+
+		Elf.Section[] sections = exe.getSections();
+		
+		// Read in sections (and only the sections) we care about.
+		//
+		for (int i = 0; i < sections.length; i++) {
+			String name = sections[i].toString();
+			for (int j = 0; j < DWARF_SectionsToParse.length; j++) {
+				if (name.equals(DWARF_SectionsToParse[j])) {
+					dwarfSections.put(DWARF_SectionsToParse[j], sections[i].loadSectionData());
+				}
+			}
+		}
+		
+		if (dwarfSections.size() < DWARF_SectionsToParse.length)
+			throw new IOException("No enough Dwarf data.");
+
+		// Don't print during parsing.
+		printEnabled = false;
+
+		m_parsed = false;
+		fileList = new ArrayList();
+	}
+
+	/*
+	 * Parse line table data of a compilation unit to get names of all source files
+	 * that contribute to the compilation unit. 
+	 */
+	void parseSourceInCULineInfo(
+			String cuCompDir,	// compilation directory of the CU 
+			int cuStmtList) 	// offste of the CU in the line table section 
+	{
+		byte[] data = (byte[]) dwarfSections.get(DWARF_DEBUG_LINE);
+		if (data != null) {
+			try {
+				int offset = cuStmtList;
+				
+				/* Read line table header:
+				 * 
+				 *  total_length:				4 bytes
+				 *  version:					2
+				 *  prologue length:			4
+				 *  minimum_instruction_len:	1
+				 *  default_is_stmt:			1
+				 *  line_base:					1
+				 *  line_range:					1
+				 *  opcode_base:				1
+				 *  standard_opcode_lengths:	(value of opcode_base)
+				 */
+				// Skip the following till "opcode_base"
+				offset = offset + 14;
+				int opcode_base = data[offset++];
+				offset += opcode_base - 1;
+
+				// Read in directories.
+				//
+				ArrayList	dirList = new ArrayList();
+
+				// Put the compilation directory of the CU as the first dir
+				dirList.add(cuCompDir);
+				
+				String 			str, fileName;
+				
+				while (true) {
+					str = readString(data, offset);
+					if (str.length() == 0)
+						break;
+					dirList.add(str);
+					offset += str.length()+1;
+				}
+				offset++;
+				
+				// Read file names
+				//
+				long	leb128;
+				while (true) {
+					fileName = readString(data, offset);
+					if (fileName.length() == 0)	// no more file entry
+						break;
+					offset += fileName.length()+1;
+					
+					// dir index
+					leb128 = read_unsigned_leb128(data, offset);
+					offset += m_leb128Size;
+					
+					addSourceFile((String)dirList.get((int)leb128), fileName);
+					
+					// Skip the followings
+					//
+					// modification time
+					leb128 = read_unsigned_leb128(data, offset);
+					offset += m_leb128Size;						
+
+					// file size in bytes
+					leb128 = read_unsigned_leb128(data, offset);
+					offset += m_leb128Size;						
+				}
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+
+	public String[] getSourceFiles() {
+		if (!m_parsed) {
+			parse(null);
+			m_parsed = true;
+
+			files = new String[fileList.size()];
+			fileList.toArray(files);
+		}
+
+		return files;
+	}
+
+	private void addSourceFile(String dir, String name)
+	{
+		if (name == null)
+			return;
+		if (name.charAt(0) == '<')	//  don't count the entry "<internal>" from GCCE compiler
+			return;
+		
+		String fullName = name;
+		
+		Path pa = new Path(name);
+		if (! pa.isAbsolute() && dir.length() > 0)
+			fullName = dir + File.separatorChar + name;
+
+		// This convert the path to canonical path (but not necessarily absolute, which
+		// is different from java.io.File.getCanonicalPath()).
+		pa = new Path(fullName);
+		fullName = pa.toOSString();
+		
+		if (!fileList.contains(fullName))
+			fileList.add(fullName);					
+	}
+	
+	/**
+	 * Read a null-ended string from the given "data" stream starting at the given "offset".
+	 * data	:  IN, byte stream
+	 * offset: IN, offset in the stream
+	 */
+	String readString(byte[] data, int offset)
+	{
+		String str;
+		
+		StringBuffer sb = new StringBuffer();
+		for (; offset < data.length; offset++) {
+			byte c = data[offset];
+			if (c == 0) {
+				break;
+			}
+			sb.append((char) c);
+		}
+
+		str = sb.toString();
+		return str;
+	}
+	
+	long read_unsigned_leb128(byte[] data, int offset) throws IOException {
+		/* unsigned */
+		long result = 0;
+		int shift = 0;
+		short b;
+
+		m_leb128Size = 0;
+		while (true) {
+			b = (short) data[offset];
+			if (b == -1)
+				break; //throw new IOException("no more data");
+			m_leb128Size++;
+			result |= ((long) (b & 0x7f) << shift);
+			if ((b & 0x80) == 0) {
+				break;
+			}
+			shift += 7;
+		}
+		
+		return result;
+	}
+
+	// Override parent: only handle TAG_Compile_Unit.
+	void processDebugInfoEntry(IDebugEntryRequestor requestor, AbbreviationEntry entry, List list) {
+		int len = list.size();
+		int tag = (int) entry.tag;
+		for (int i = 0; i < len; i++) {
+			switch (tag) {
+				case DwarfConstants.DW_TAG_compile_unit :
+					processCompileUnit(requestor, list);
+					break;
+				default:
+					break;
+			}
+		}
+	}
+
+	// Override parent.
+	// Just get the file name of the CU.
+	// Argument "requestor" is ignored.
+	void processCompileUnit(IDebugEntryRequestor requestor, List list) {
+		
+		String cuName, cuCompDir;
+		int		stmtList = -1;
+		
+		cuName = cuCompDir = "";
+		
+		for (int i = 0; i < list.size(); i++) {
+			AttributeValue av = (AttributeValue)list.get(i);
+			try {
+				int name = (int)av.attribute.name;
+				switch(name) {
+					case DwarfConstants.DW_AT_name:
+						cuName = (String)av.value;
+						break;
+					case DwarfConstants.DW_AT_comp_dir:
+						cuCompDir = (String)av.value;
+						break;
+					case DwarfConstants.DW_AT_stmt_list:
+						stmtList = ((Number)av.value).intValue();
+						break;
+					default:
+						break;
+				}
+			} catch (ClassCastException e) {
+			}
+		}
+
+		addSourceFile(cuCompDir, cuName);
+		if (stmtList > -1)	// this CU has "stmt_list" attribute
+			parseSourceInCULineInfo(cuCompDir, stmtList);
+	}
+}

core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/Elf.java

@@ -19,11 +19,16 @@ import java.util.Comparator;
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.IAddress;
 import org.eclipse.cdt.core.IAddressFactory;
+import org.eclipse.cdt.core.ISymbolReader;
 import org.eclipse.cdt.utils.Addr32;
 import org.eclipse.cdt.utils.Addr32Factory;
 import org.eclipse.cdt.utils.Addr64;
 import org.eclipse.cdt.utils.Addr64Factory;
 import org.eclipse.cdt.utils.ERandomAccessFile;
+import org.eclipse.cdt.utils.coff.Coff.SectionHeader;
+import org.eclipse.cdt.utils.coff.PE.Attribute;
+import org.eclipse.cdt.utils.debug.dwarf.DwarfReader;
+import org.eclipse.cdt.utils.debug.stabs.StabsReader;
 
 // test checkin
 public class Elf {
@@ -1141,4 +1146,22 @@ public class Elf {
 		}
 		return result;
 	}
+
+	private ISymbolReader createDwarfReader() {
+		DwarfReader reader = null;
+		// Check if Dwarf data exists
+		try {
+			reader = new DwarfReader(this);
+		} catch (IOException e) {
+			// No Dwarf data in the Elf.
+		}
+		return reader;
+	}
+
+	public ISymbolReader getSymbolReader() {
+		ISymbolReader reader = null;
+		reader = createDwarfReader();
+		return reader;
+	}
+
 }

core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/parser/ElfBinaryObject.java

@@ -19,6 +19,7 @@ import java.util.List;
 
 import org.eclipse.cdt.core.IAddressFactory;
 import org.eclipse.cdt.core.IBinaryParser;
+import org.eclipse.cdt.core.ISymbolReader;
 import org.eclipse.cdt.core.IBinaryParser.IBinaryFile;
 import org.eclipse.cdt.core.IBinaryParser.ISymbol;
 import org.eclipse.cdt.utils.AR;
@@ -183,6 +184,12 @@ public class ElfBinaryObject extends BinaryObjectAdapter {
 			} catch (IOException e) {
 			}
 		}
+		if (adapter.equals(ISymbolReader.class)) {
+			Elf elf = (Elf)getAdapter(Elf.class);
+			if (elf != null) {
+				return elf.getSymbolReader();
+			}
+		}
 		return super.getAdapter(adapter);
 	}