Add basic C++ implementation of CPU profiler.

src/runtime.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5713 matching lines @@
   year += 4 * yd2;
 
   date--;
   int yd3 = date / 365;
   date %= 365;
   year += yd3;
 
   bool is_leap = (!yd1 || yd2) && !yd3;
 
   ASSERT(date >= -1);
-  ASSERT(is_leap || date >= 0);
-  ASSERT(date < 365 || is_leap && date < 366);
-  ASSERT(is_leap == (year % 4 == 0 && (year % 100 || (year % 400 == 0))));
-  ASSERT(is_leap || MakeDay(year, 0, 1) + date == save_date);
-  ASSERT(!is_leap || MakeDay(year, 0, 1) + date + 1 == save_date);
+  ASSERT(is_leap || (date >= 0));
+  ASSERT((date < 365) || (is_leap && (date < 366)));
+  ASSERT(is_leap == ((year % 4 == 0) && (year % 100 || (year % 400 == 0))));
+  ASSERT(is_leap || ((MakeDay(year, 0, 1) + date) == save_date));
+  ASSERT(!is_leap || ((MakeDay(year, 0, 1) + date + 1) == save_date));
 
   if (is_leap) {
     day = kDayInYear[2*365 + 1 + date];
     month = kMonthInYear[2*365 + 1 + date];
   } else {
     day = kDayInYear[date];
     month = kMonthInYear[date];
   }
 
   ASSERT(MakeDay(year, month, day) == save_date);
@@ skipping 3675 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage(false);
   }
 }
 
 
 } }  // namespace v8::internal