Move CompilerStats from isolate to thread. Aggregate stats.

runtime/vm/compiler_stats.h

Index: runtime/vm/compiler_stats.h
diff --git a/runtime/vm/compiler_stats.h b/runtime/vm/compiler_stats.h
index 9b9e67b7a0898677cf81139b7cfdc66ac1a54b8e..5ed753703f311b300399d9bb109bdf9a70dfd862 100644
--- a/runtime/vm/compiler_stats.h
+++ b/runtime/vm/compiler_stats.h
@@ -6,6 +6,7 @@
 #define VM_COMPILER_STATS_H_
 
 #include "vm/allocation.h"
+#include "vm/atomic.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
 #include "vm/timer.h"
@@ -13,10 +14,47 @@
 
 namespace dart {
 
-
 DECLARE_FLAG(bool, compiler_stats);
 DECLARE_FLAG(bool, compiler_benchmark);
 
+
+#define STAT_TIMERS(V)                                                         \
+  V(parser_timer, "parser timer")                                              \
+  V(scanner_timer, "scanner timer")                                            \
+  V(codegen_timer, "codegen timer")                                            \
+  V(graphbuilder_timer, "flow graph builder timer")                            \
+  V(ssa_timer, "flow graph SSA timer")                                         \
+  V(graphinliner_timer, "flow graph inliner timer")                            \
+  V(graphinliner_parse_timer, "inliner parsing timer")                         \
+  V(graphinliner_build_timer, "inliner building timer")                        \
+  V(graphinliner_ssa_timer, "inliner SSA timer")                               \
+  V(graphinliner_opt_timer, "inliner optimization timer")                      \
+  V(graphinliner_subst_timer, "inliner substitution timer")                    \
+  V(graphoptimizer_timer, "flow graph optimizer timer")                        \
+  V(graphcompiler_timer, "flow graph compiler timer")                          \
+  V(codefinalizer_timer, "code finalization timer")                            \
+
+
+#define STAT_COUNTERS(V)                                                       \
+  V(num_tokens_total)                                                          \
+  V(num_tokens_scanned)                                                        \
+  V(num_tokens_consumed)                                                       \
+  V(num_cached_consts)                                                         \
+  V(num_const_cache_hits)                                                      \
+  V(num_classes_parsed)                                                        \
+  V(num_class_tokens)                                                          \
+  V(num_functions_parsed)                                                      \
+  V(num_functions_compiled)                                                    \
+  V(num_functions_optimized)                                                   \
+  V(num_func_tokens_compiled)                                                  \
+  V(num_implicit_final_getters)                                                \
+  V(num_method_extractors)                                                     \
+  V(src_length)                                                                \
+  V(total_code_size)                                                           \
+  V(total_instr_size)                                                          \
+  V(pc_desc_size)                                                              \
+  V(vardesc_size)                                                              \
+
 class CompilerStats {
  public:
   explicit CompilerStats(Isolate* isolate);
@@ -24,6 +62,8 @@ class CompilerStats {
 
   Isolate* isolate_;
 
+  // We could use STAT_TIMERS and STAT_COUNTERS to declare fields, but then
+  // we would be losing the comments.
   Timer parser_timer;         // Cumulative runtime of parser.
   Timer scanner_timer;        // Cumulative runtime of scanner.
   Timer codegen_timer;        // Cumulative runtime of code generator.
@@ -63,28 +103,38 @@ class CompilerStats {
   char* text;
   bool use_benchmark_output;
 
-  // Update stats that are computed, e.g. token count.
-  void Update();
 
   void EnableBenchmark();
   char* BenchmarkOutput();
   char* PrintToZone();
+
+  // Used to aggregate stats.
+  void Add(const CompilerStats& other);
+  void Clear();
+
+  bool IsCleared() const;
+
+ private:
+  // Update stats that are computed, e.g. token count.
+  void Update();
 };
 
+// Make increment atomic in case it occurs in parallel with aggregation from
+// other thread.
 #define INC_STAT(thread, counter, incr)                                        \
   if (FLAG_support_compiler_stats && FLAG_compiler_stats) {                    \
-    MutexLocker ml((thread)->isolate()->mutex());                              \
-    (thread)->isolate()->compiler_stats()->counter += (incr);                  \
+    AtomicOperations::IncrementInt64By(                                        \
+        &(thread)->compiler_stats()->counter, (incr));                         \
   }
 
 #define STAT_VALUE(thread, counter)                                            \
   ((FLAG_support_compiler_stats && FLAG_compiler_stats) ?                      \
-      (thread)->isolate()->compiler_stats()->counter : 0)
+      (thread)->compiler_stats()->counter : 0)
 
 #define CSTAT_TIMER_SCOPE(thr, t)                                              \
   TimerScope timer(FLAG_support_compiler_stats && FLAG_compiler_stats,         \
       (FLAG_support_compiler_stats && FLAG_compiler_stats) ?                   \
-      &((thr)->isolate()->compiler_stats()->t) : NULL,                         \
+      &((thr)->compiler_stats()->t) : NULL,                                    \
       thr);