Runtime call counters and timers.

src/runtime/runtime.cc

Index: src/runtime/runtime.cc
diff --git a/src/runtime/runtime.cc b/src/runtime/runtime.cc
index c532d13b289f376b9e61ef4e9d754464d2137a78..a59a21b509f246cd95142c7b8c77da9b2f446932 100644
--- a/src/runtime/runtime.cc
+++ b/src/runtime/runtime.cc
@@ -4,6 +4,8 @@
 
 #include "src/runtime/runtime.h"
 
+#include <iomanip>
+
 #include "src/assembler.h"
 #include "src/contexts.h"
 #include "src/handles-inl.h"
@@ -130,5 +132,80 @@ std::ostream& operator<<(std::ostream& os, Runtime::FunctionId id) {
   return os << Runtime::FunctionForId(id)->name;
 }
 
+
+class RuntimeCallStatEntries {
+ public:
+  void Print(std::ostream& os) {
+    if (total_call_count > 0) {
+      std::sort(entries.rbegin(), entries.rend());
+      os << "Runtime function                                  Time      "
+            "Count"
+         << std::endl
+         << std::string(70, '=') << std::endl;
+      for (Entry& entry : entries) {
+        entry.Print(os);
+      }
+      os << std::string(60, '-') << std::endl;
+      Entry("Total", total_time, total_call_count).Print(os);
+    }
+  }
+
+  void Add(const char* name, base::TimeDelta time, uint32_t count) {
+    entries.push_back(Entry(name, time, count));
+    total_time += time;
+    total_call_count += count;
+  }
+
+ private:
+  class Entry {
+   public:
+    Entry(const char* name, base::TimeDelta time, uint64_t count)
+        : name_(name), time_(time.InMilliseconds()), count_(count) {}
+
+    bool operator<(const Entry& other) const {
+      if (time_ < other.time_) return true;
+      if (time_ > other.time_) return false;
+      return count_ < other.count_;
+    }
+
+    void Print(std::ostream& os) {
+      os << std::setw(50) << name_;
+      os << std::setw(8) << time_ << "ms";
+      os << std::setw(10) << count_ << std::endl;
+    }
+
+   private:
+    const char* name_;
+    int64_t time_;
+    uint64_t count_;
+  };
+
+  uint64_t total_call_count = 0;
+  base::TimeDelta total_time;
+  std::vector<Entry> entries;
+};
+
+
+void RuntimeCallStats::Print(std::ostream& os) {
+  RuntimeCallStatEntries entries;
+
+#define PRINT_COUNTER(name, nargs, ressize)                                    \
+  if (this->Count_Runtime_##name > 0) {                                        \
+    entries.Add(#name, this->Time_Runtime_##name, this->Count_Runtime_##name); \
+  }
+  FOR_EACH_INTRINSIC(PRINT_COUNTER)
+#undef PRINT_COUNTER
+  entries.Print(os);
+}
+
+
+void RuntimeCallStats::Reset() {
+#define RESET_COUNTER(name, nargs, ressize) \
+  Count_Runtime_##name = 0;                 \
+  Time_Runtime_##name = base::TimeDelta();
+  FOR_EACH_INTRINSIC(RESET_COUNTER)
+#undef RESET_COUNTER
+}
+
 }  // namespace internal
 }  // namespace v8