code review 204053: runtime: instrument malloc + garbage collector.

src/pkg/runtime/runtime.c

 // Copyright 2009 The Go 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 "runtime.h"
 
 int32   panicking       = 0;
 int32   maxround        = sizeof(uintptr);
 int32   fd              = 1;
 
@@ skipping 443 matching lines @@
 [AFAKE] { nohash, noequal, noprint, nocopy },
 };
 
 #pragma textflag 7
 void
 FLUSH(void *v)
 {
         USED(v);
 }
 
+int64
+nanotime(void)
+{
+        int64 sec;
+        int32 usec;
+········
+        sec = 0;
+        usec = 0;
+        gettime(&sec, &usec);
+        return sec*1000000000 + (int64)usec*1000;
+}