Breakpad Mac symbol dumper: Add new Mach-O reader class.

This patch adds files defining new classes in the google_breakpad::Mach_O
namespace for parsing fat binaries and Mach-O files. These are used in the
new dumper to handle STABS debugging information, DWARF call frame
information, and .eh_frame exception handling stack walking information.

These new classes are independent of endianness and word size, and
therefore can be used on binaries of all the relevant architectures: x86,
x86_64, ppc, and ARM.

The patch adds a complete set of unit tests for the new classes.
A=jimb R=mark (http://breakpad.appspot.com/93001/show, http://breakpad.appspot.com/115001/show)

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@610 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/common/test_assembler.cc

@@ -32,14 +32,15 @@
 // test_assembler.cc: Implementation of google_breakpad::TestAssembler.
 // See test_assembler.h for details.
 
-#include <cassert>
-#include <cstdio>
+#include <assert.h>
+#include <stdio.h>
+
 #include <iterator>
 
 #include "common/test_assembler.h"
 
 namespace google_breakpad {
-namespace TestAssembler {
+namespace test_assembler {
 
 using std::back_insert_iterator;
 
@@ -201,7 +202,7 @@ void Label::Binding::Get(Binding **base, u_int64_t *addend) {
 }
 
 template<typename Inserter>
-static inline void InsertEndian(TestAssembler::Endianness endianness,
+static inline void InsertEndian(test_assembler::Endianness endianness,
                                 size_t size, u_int64_t number, Inserter dest) {
   assert(size > 0);
   if (endianness == kLittleEndian) {
@@ -341,7 +342,7 @@ bool Section::GetContents(string *contents) {
     Reference &r = references_[i];
     u_int64_t value;
     if (!r.label.IsKnownConstant(&value)) {
-      fprintf(stderr, "Undefined label #%d at offset 0x%x\n", i, r.offset);
+      fprintf(stderr, "Undefined label #%zu at offset 0x%zx\n", i, r.offset);
       return false;
     }
     assert(r.offset < contents_.size());
@@ -354,5 +355,5 @@ bool Section::GetContents(string *contents) {
   return true;
 }
 
-} // namespace TestAssembler
-} // namespace google_breakpad
+}  // namespace test_assembler
+}  // namespace google_breakpad