Add custom implementation of NXGetArchInfoXXX to allow adding new arch.

NXGetArchInfoXXX depends on the OS knowledge of architecture. This CL adds a
custom implementation of those methods to be able to handle newer CPU before
they are handled by the OS. It also add handling for armv7s architecture.
Review URL: https://breakpad.appspot.com/475002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1057 4c0a9323-5329-0410-9bdc-e9ce6186880e

3 files changed, 135 insertions, 7 deletions

diff --git a/src/common/mac/arch_utilities.cc b/src/common/mac/arch_utilities.cc
new file mode 100644
index 00000000..6f7c494c
--- /dev/null
+++ b/src/common/mac/arch_utilities.cc
@@ -0,0 +1,80 @@
+// Copyright (c) 2012, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "common/mac/arch_utilities.h"
+
+#include <mach-o/arch.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifndef CPU_TYPE_ARM
+#define CPU_TYPE_ARM (static_cast<cpu_type_t>(12))
+#endif  // CPU_TYPE_ARM
+
+#ifndef CPU_SUBTYPE_ARM_V7
+#define CPU_SUBTYPE_ARM_V7 (static_cast<cpu_subtype_t>(9))
+#endif  // CPU_SUBTYPE_ARM_V7
+
+#ifndef CPU_SUBTYPE_ARM_V7S
+#define CPU_SUBTYPE_ARM_V7S (static_cast<cpu_subtype_t>(11))
+#endif  // CPU_SUBTYPE_ARM_V7S
+
+namespace {
+
+const NXArchInfo* ArchInfo_armv7s() {
+  NXArchInfo* armv7s = new NXArchInfo;
+  *armv7s = *NXGetArchInfoFromCpuType(CPU_TYPE_ARM,
+                                      CPU_SUBTYPE_ARM_V7);
+  armv7s->name = "armv7s";
+  armv7s->cpusubtype = CPU_SUBTYPE_ARM_V7S;
+  return armv7s;
+}
+
+}  // namespace
+
+namespace google_breakpad {
+
+const NXArchInfo* BreakpadGetArchInfoFromName(const char* arch_name) {
+  // TODO: Remove this when the OS knows about armv7s.
+  if (!strcmp("armv7s", arch_name))
+    return BreakpadGetArchInfoFromCpuType(CPU_TYPE_ARM, CPU_SUBTYPE_ARM_V7S);
+  return NXGetArchInfoFromName(arch_name);
+}
+
+const NXArchInfo* BreakpadGetArchInfoFromCpuType(cpu_type_t cpu_type,
+                                                 cpu_subtype_t cpu_subtype) {
+  // TODO: Remove this when the OS knows about armv7s.
+  if (cpu_type == CPU_TYPE_ARM && cpu_subtype == CPU_SUBTYPE_ARM_V7S) {
+    static const NXArchInfo* armv7s = ArchInfo_armv7s();
+    return armv7s;
+  }
+  return NXGetArchInfoFromCpuType(cpu_type, cpu_subtype);
+}
+
+}  // namespace google_breakpad
diff --git a/src/common/mac/arch_utilities.h b/src/common/mac/arch_utilities.h
new file mode 100644
index 00000000..397c1f58
--- /dev/null
+++ b/src/common/mac/arch_utilities.h
@@ -0,0 +1,47 @@
+// Copyright (c) 2012, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// arch_utilities.h: Utilities for architecture introspection for Mac platform.
+
+#ifndef COMMON_MAC_ARCH_UTILITIES_H__
+#define COMMON_MAC_ARCH_UTILITIES_H__
+
+#include <mach-o/arch.h>
+
+namespace google_breakpad {
+
+// Custom implementation of |NXGetArchInfoFromName| and
+// |NXGetArchInfoFromCpuType| that handle newer CPU on older OSes.
+const NXArchInfo* BreakpadGetArchInfoFromName(const char* arch_name);
+const NXArchInfo* BreakpadGetArchInfoFromCpuType(cpu_type_t cpu_type,
+                                                 cpu_subtype_t cpu_subtype);
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_MAC_ARCH_UTILITIES_H__
diff --git a/src/common/mac/dump_syms.mm b/src/common/mac/dump_syms.mm
index 9783514f..ad2afd01 100644
--- a/src/common/mac/dump_syms.mm
+++ b/src/common/mac/dump_syms.mm
@@ -50,6 +50,7 @@
 #include "common/dwarf_cu_to_module.h"
 #include "common/dwarf_line_to_module.h"
 #include "common/mac/file_id.h"
+#include "common/mac/arch_utilities.h"
 #include "common/mac/macho_reader.h"
 #include "common/module.h"
 #include "common/stabs_reader.h"
@@ -191,7 +192,8 @@ bool DumpSymbols::SetArchitecture(cpu_type_t cpu_type,
 
 bool DumpSymbols::SetArchitecture(const std::string &arch_name) {
   bool arch_set = false;
-  const NXArchInfo *arch_info = NXGetArchInfoFromName(arch_name.c_str());
+  const NXArchInfo *arch_info =
+      google_breakpad::BreakpadGetArchInfoFromName(arch_name.c_str());
   if (arch_info) {
     arch_set = SetArchitecture(arch_info->cputype, arch_info->cpusubtype);
   }
@@ -312,9 +314,8 @@ bool DumpSymbols::ReadCFI(google_breakpad::Module *module,
       register_names = DwarfCFIToModule::RegisterNames::ARM();
       break;
     default: {
-      const NXArchInfo *arch =
-          NXGetArchInfoFromCpuType(macho_reader.cpu_type(),
-                                   macho_reader.cpu_subtype());
+      const NXArchInfo *arch = google_breakpad::BreakpadGetArchInfoFromCpuType(
+          macho_reader.cpu_type(), macho_reader.cpu_subtype());
       fprintf(stderr, "%s: cannot convert DWARF call frame information for ",
               selected_object_name_.c_str());
       if (arch)
@@ -446,9 +447,9 @@ bool DumpSymbols::WriteSymbolFile(std::ostream &stream, bool cfi) {
 
   // Find the name of the selected file's architecture, to appear in
   // the MODULE record and in error messages.
-  const NXArchInfo *selected_arch_info
-      = NXGetArchInfoFromCpuType(selected_object_file_->cputype,
-                                 selected_object_file_->cpusubtype);
+  const NXArchInfo *selected_arch_info =
+      google_breakpad::BreakpadGetArchInfoFromCpuType(
+          selected_object_file_->cputype, selected_object_file_->cpusubtype);
 
   const char *selected_arch_name = selected_arch_info->name;
   if (strcmp(selected_arch_name, "i386") == 0)