Check for cpu items before assuming it will work.

base/cpu.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/cpu.h"
 #include <intrin.h>
 #include <string>
 
 namespace base {
 
@@ skipping 21 matching lines @@
   // More info can be found here:
   // http://msdn.microsoft.com/en-us/library/hskdteyh.aspx
   __cpuid(cpu_info, 0);
   int num_ids = cpu_info[0];
   memset(cpu_string, 0, sizeof(cpu_string));
   *(reinterpret_cast<int*>(cpu_string)) = cpu_info[1];
   *(reinterpret_cast<int*>(cpu_string+4)) = cpu_info[3];
   *(reinterpret_cast<int*>(cpu_string+8)) = cpu_info[2];
 
   // Interpret CPU feature information.
-  __cpuid(cpu_info, 1);
-  stepping_ = cpu_info[0] & 0xf;
-  model_ = (cpu_info[0] >> 4) & 0xf;
-  family_ = (cpu_info[0] >> 8) & 0xf;
-  type_ = (cpu_info[0] >> 12) & 0x3;
-  ext_model_ = (cpu_info[0] >> 16) & 0xf;
-  ext_family_ = (cpu_info[0] >> 20) & 0xff;
-  cpu_vendor_ = cpu_string;
+  if (num_ids > 0) {
+    __cpuid(cpu_info, 1);
+    stepping_ = cpu_info[0] & 0xf;
+    model_ = (cpu_info[0] >> 4) & 0xf;
+    family_ = (cpu_info[0] >> 8) & 0xf;
+    type_ = (cpu_info[0] >> 12) & 0x3;
+    ext_model_ = (cpu_info[0] >> 16) & 0xf;
+    ext_family_ = (cpu_info[0] >> 20) & 0xff;
+    cpu_vendor_ = cpu_string;
+  }
 }
 
 }  // namespace base