Make arm32 cpu detection recognize the DragonBoard as arm64.

runtime/vm/cpuinfo_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "vm/cpuinfo.h"
 #include "vm/cpuid.h"
 #include "vm/proccpuinfo.h"
 
 #include "platform/assert.h"
 
 // As with Windows, on IA32 and X64, we use the cpuid instruction.
 // The analogous instruction is privileged on ARM and MIPS, so we resort to
 // reading from /proc/cpuinfo.
 
 namespace dart {
 
 CpuInfoMethod CpuInfo::method_ = kCpuInfoDefault;
 const char* CpuInfo::fields_[kCpuInfoMax] = {0};
 
 void CpuInfo::InitOnce() {
 #if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
   fields_[kCpuInfoProcessor] = "vendor_id";
   fields_[kCpuInfoModel] = "model name";
   fields_[kCpuInfoHardware] = "model name";
   fields_[kCpuInfoFeatures] = "flags";
+  fields_[kCpuInfoArchitecture] = "CPU architecture";
   method_ = kCpuInfoCpuId;
   CpuId::InitOnce();
 #elif defined(HOST_ARCH_ARM)
   fields_[kCpuInfoProcessor] = "Processor";
   fields_[kCpuInfoModel] = "model name";
   fields_[kCpuInfoHardware] = "Hardware";
   fields_[kCpuInfoFeatures] = "Features";
+  fields_[kCpuInfoArchitecture] = "CPU architecture";
   method_ = kCpuInfoSystem;
   ProcCpuInfo::InitOnce();
 #elif defined(HOST_ARCH_ARM64)
   fields_[kCpuInfoProcessor] = "Processor";
   fields_[kCpuInfoModel] = "CPU implementer";
   fields_[kCpuInfoHardware] = "CPU implementer";
   fields_[kCpuInfoFeatures] = "Features";
+  fields_[kCpuInfoArchitecture] = "CPU architecture";
   method_ = kCpuInfoSystem;
   ProcCpuInfo::InitOnce();
 #elif defined(HOST_ARCH_MIPS)
   fields_[kCpuInfoProcessor] = "system type";
   fields_[kCpuInfoModel] = "cpu model";
   fields_[kCpuInfoHardware] = "cpu model";
   fields_[kCpuInfoFeatures] = "ASEs implemented";
+  fields_[kCpuInfoArchitecture] = "CPU architecture";
   method_ = kCpuInfoSystem;
   ProcCpuInfo::InitOnce();
 #else
 #error Unrecognized target architecture
 #endif
 }
 
 
 void CpuInfo::Cleanup() {
   if (method_ == kCpuInfoCpuId) {
@@ skipping 36 matching lines @@
            (strcmp(field, fields_[kCpuInfoFeatures]) == 0);
   } else {
     ASSERT(method_ == kCpuInfoSystem);
     return ProcCpuInfo::HasField(field);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)