Fix Mac Breakpad host tools to build in Linux cross-compile

We're working on building our Firefox Mac builds as a Linux cross-compile
(https://bugzilla.mozilla.org/show_bug.cgi?id=921040) and we need symbol
dumping to work. This change ports the Mac dump_syms tool to build and work
on Linux. I've tested it and it produces identical output to running the
tool on Mac.

The bulk of the work here was converting src/common/mac/dump_syms.mm and
src/tools/mac/dump_syms/dump_syms_tool.mm from ObjC++ to C++ and removing
their use of Foundation classes in favor of standard C/C++.

This won't compile out-of-the-box on Linux, it requires some Mac system
headers that are not included in this patch. I have those tentatively in
a separate patch to land in Gecko
(http://hg.mozilla.org/users/tmielczarek_mozilla.com/mc/rev/5fb8da23c83c),
but I wasn't sure if you'd be interested in having them in the Breakpad tree.
We could almost certainly pare down the set of headers included there, I
didn't spend too much time trying to minimize them (we primarily just need
the Mach-O structs and a few associated bits).

I just realized that this patch is missing updating the XCode project files
(ugh). I'll fix that up in a bit.

R=mark@chromium.org
BUG=https://bugzilla.mozilla.org/show_bug.cgi?id=543111

Review URL: https://codereview.chromium.org/1340543002 .

1 files changed, 64 insertions, 0 deletions

diff --git a/src/third_party/mac_headers/mach-o/fat.h b/src/third_party/mac_headers/mach-o/fat.h
new file mode 100644
index 00000000..e2bcf433
--- /dev/null
+++ b/src/third_party/mac_headers/mach-o/fat.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+#ifndef _MACH_O_FAT_H_
+#define _MACH_O_FAT_H_
+/*
+ * This header file describes the structures of the file format for "fat"
+ * architecture specific file (wrapper design).  At the begining of the file
+ * there is one fat_header structure followed by a number of fat_arch
+ * structures.  For each architecture in the file, specified by a pair of
+ * cputype and cpusubtype, the fat_header describes the file offset, file
+ * size and alignment in the file of the architecture specific member.
+ * The padded bytes in the file to place each member on it's specific alignment
+ * are defined to be read as zeros and can be left as "holes" if the file system
+ * can support them as long as they read as zeros.
+ *
+ * All structures defined here are always written and read to/from disk
+ * in big-endian order.
+ */
+
+/*
+ * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
+ * and contains the constants for the possible values of these types.
+ */
+#include <stdint.h>
+#include <mach/machine.h>
+#include <architecture/byte_order.h>
+
+#define FAT_MAGIC	0xcafebabe
+#define FAT_CIGAM	0xbebafeca	/* NXSwapLong(FAT_MAGIC) */
+
+struct fat_header {
+	uint32_t	magic;		/* FAT_MAGIC */
+	uint32_t	nfat_arch;	/* number of structs that follow */
+};
+
+struct fat_arch {
+	cpu_type_t	cputype;	/* cpu specifier (int) */
+	cpu_subtype_t	cpusubtype;	/* machine specifier (int) */
+	uint32_t	offset;		/* file offset to this object file */
+	uint32_t	size;		/* size of this object file */
+	uint32_t	align;		/* alignment as a power of 2 */
+};
+
+#endif /* _MACH_O_FAT_H_ */