Refactors CPU feature detection.

runtime/vm/service.cc

 // Copyright (c) 2013, 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/service.h"
 
 #include "include/dart_api.h"
 
 #include "vm/compiler.h"
 #include "vm/coverage.h"
@@ skipping 1039 matching lines @@
       PrintError(js, "Command too long");
       return true;
     }
   } else {
     PrintError(js, "Unrecognized subcommand '%s'", js->GetArgument(1));
     return true;
   }
 }
 
 
+static bool HandleCpu(Isolate* isolate, JSONStream* js) {
+  JSONObject jsobj(js);
+  jsobj.AddProperty("type", "CPU");
+  jsobj.AddProperty("targetCPU", CPU::Id());
+  jsobj.AddProperty("hostCPU", HostCPUFeatures::hardware());
+  return true;
+}
+
+
 static bool HandleCode(Isolate* isolate, JSONStream* js) {
   REQUIRE_COLLECTION_ID("code");
   uintptr_t pc;
   if (!GetUnsignedIntegerId(js->GetArgument(1), &pc, 16)) {
     PrintError(js, "Must specify code address: code/c0deadd0.");
     return true;
   }
   Code& code = Code::Handle(Code::LookupCode(pc));
   if (code.IsNull()) {
     PrintError(js, "Could not find code at %" Px "", pc);
@@ skipping 21 matching lines @@
 }
 
 
 static IsolateMessageHandlerEntry isolate_handlers[] = {
   { "_echo", HandleIsolateEcho },
   { "", HandleIsolate },
   { "allocationprofile", HandleAllocationProfile },
   { "classes", HandleClasses },
   { "code", HandleCode },
   { "coverage", HandleCoverage },
+  { "cpu", HandleCpu },
   { "debug", HandleDebug },
   { "libraries", HandleLibraries },
   { "objecthistogram", HandleObjectHistogram},
   { "objects", HandleObjects },
   { "profile", HandleProfile },
   { "scripts", HandleScripts },
   { "stacktrace", HandleStackTrace },
 };
 
 
@@ skipping 92 matching lines @@
   for (intptr_t i = 0; i < num_message_handlers; i++) {
     const RootMessageHandlerEntry& entry = root_handlers[i];
     if (!strcmp(command, entry.command)) {
       return entry.handler;
     }
   }
   return NULL;
 }
 
 }  // namespace dart