Uses SNPRINT macro where possible. Otherwise uses #define for format.

runtime/vm/version_in.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/version.h"
 
 #include "vm/cpu.h"
 #include "vm/os.h"
 
 namespace dart {
 
 // TODO(iposva): Avoid racy initialization.
 static const char* formatted_version = NULL;
 
 const char* Version::String() {
   if (formatted_version == NULL) {
-    const char* format = "%s on \"%s_%s\"";
     const char* os = OS::Name();
     const char* arch = CPU::Id();
-
-    intptr_t len = OS::SNPrint(NULL, 0, format, str_, os, arch);
-    char* buffer = reinterpret_cast<char*>(malloc(len + 1));
-    OS::SNPrint(buffer, (len + 1), format, str_, os, arch);
-    formatted_version = buffer;
+    formatted_version = OS::SCreate(NULL, "%s on \"%s_%s\"", str_, os, arch);
   }
   return formatted_version;
 }
 
 
 const char* Version::SnapshotString() {
   return snapshot_hash_;
 }
 
 const char* Version::snapshot_hash_ = "{{SNAPSHOT_HASH}}";
 const char* Version::str_ = "{{VERSION_STR}} ({{BUILD_TIME}})";
 
 }  // namespace dart