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, 105 insertions, 0 deletions

diff --git a/src/third_party/mac_headers/mach-o/arch.h b/src/third_party/mac_headers/mach-o/arch.h
new file mode 100644
index 00000000..526c10fc
--- /dev/null
+++ b/src/third_party/mac_headers/mach-o/arch.h
@@ -0,0 +1,105 @@
+/*
+ * 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_ARCH_H_
+#define _MACH_O_ARCH_H_
+/*
+ * Copyright (c) 1997 Apple Computer, Inc.
+ *
+ * Functions that deal with information about architectures.
+ *
+ */
+
+#include <stdint.h>
+#include <mach/machine.h>
+#include <architecture/byte_order.h>
+
+/* The NXArchInfo structs contain the architectures symbolic name
+ * (such as "ppc"), its CPU type and CPU subtype as defined in
+ * mach/machine.h, the byte order for the architecture, and a
+ * describing string (such as "PowerPC").
+ * There will both be entries for specific CPUs (such as ppc604e) as
+ * well as generic "family" entries (such as ppc).
+ */
+typedef struct {
+    const char *name;
+    cpu_type_t cputype;
+    cpu_subtype_t cpusubtype;
+    enum NXByteOrder byteorder;
+    const char *description;
+} NXArchInfo;
+
+#if __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* NXGetAllArchInfos() returns a pointer to an array of all known
+ * NXArchInfo structures.  The last NXArchInfo is marked by a NULL name.
+ */
+extern const NXArchInfo *NXGetAllArchInfos(void);
+
+/* NXGetLocalArchInfo() returns the NXArchInfo for the local host, or NULL
+ * if none is known. 
+ */
+extern const NXArchInfo *NXGetLocalArchInfo(void);
+
+/* NXGetArchInfoFromName() and NXGetArchInfoFromCpuType() return the
+ * NXArchInfo from the architecture's name or cputype/cpusubtype
+ * combination.  A cpusubtype of CPU_SUBTYPE_MULTIPLE can be used
+ * to request the most general NXArchInfo known for the given cputype.
+ * NULL is returned if no matching NXArchInfo can be found.
+ */
+extern const NXArchInfo *NXGetArchInfoFromName(const char *name);
+extern const NXArchInfo *NXGetArchInfoFromCpuType(cpu_type_t cputype,
+						  cpu_subtype_t cpusubtype);
+
+/* NXFindBestFatArch() is passed a cputype and cpusubtype and a set of
+ * fat_arch structs and selects the best one that matches (if any) and returns
+ * a pointer to that fat_arch struct (or NULL).  The fat_arch structs must be
+ * in the host byte order and correct such that the fat_archs really points to
+ * enough memory for nfat_arch structs.  It is possible that this routine could
+ * fail if new cputypes or cpusubtypes are added and an old version of this
+ * routine is used.  But if there is an exact match between the cputype and
+ * cpusubtype and one of the fat_arch structs this routine will always succeed.
+ */
+extern struct fat_arch *NXFindBestFatArch(cpu_type_t cputype,
+					  cpu_subtype_t cpusubtype,
+					  struct fat_arch *fat_archs,
+					  uint32_t nfat_archs);
+
+/* NXCombineCpuSubtypes() returns the resulting cpusubtype when combining two
+ * different cpusubtypes for the specified cputype.  If the two cpusubtypes
+ * can't be combined (the specific subtypes are mutually exclusive) -1 is
+ * returned indicating it is an error to combine them.  This can also fail and
+ * return -1 if new cputypes or cpusubtypes are added and an old version of
+ * this routine is used.  But if the cpusubtypes are the same they can always
+ * be combined and this routine will return the cpusubtype pass in.
+ */
+extern cpu_subtype_t NXCombineCpuSubtypes(cpu_type_t cputype,
+					  cpu_subtype_t cpusubtype1,
+					  cpu_subtype_t cpusubtype2);
+
+#if __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _MACH_O_ARCH_H_ */