Add --dump-counters-nvp option for easier parsing of counter output.

src/d8.cc

 // Copyright 2012 the V8 project 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 <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 
 #include <algorithm>
@@ skipping 1670 matching lines @@
                                         ->interpreter()
                                         ->GetDispatchCountersObject();
   std::ofstream dispatch_counters_stream(
       i::FLAG_trace_ignition_dispatches_output_file);
   dispatch_counters_stream << *String::Utf8Value(
       JSON::Stringify(context, dispatch_counters).ToLocalChecked());
 }
 
 
 void Shell::OnExit(v8::Isolate* isolate) {
-  if (i::FLAG_dump_counters) {
+  if (i::FLAG_dump_counters || i::FLAG_dump_counters_nvp) {
     int number_of_counters = 0;
     for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) {
       number_of_counters++;
     }
     CounterAndKey* counters = new CounterAndKey[number_of_counters];
     int j = 0;
     for (CounterMap::Iterator i(counter_map_); i.More(); i.Next(), j++) {
       counters[j].counter = i.CurrentValue();
       counters[j].key = i.CurrentKey();
     }
     std::sort(counters, counters + number_of_counters);
-    printf("+----------------------------------------------------------------+"
-           "-------------+\n");
-    printf("| Name                                                           |"
-           " Value       |\n");
-    printf("+----------------------------------------------------------------+"
-           "-------------+\n");
-    for (j = 0; j < number_of_counters; j++) {
-      Counter* counter = counters[j].counter;
-      const char* key = counters[j].key;
-      if (counter->is_histogram()) {
-        printf("| c:%-60s | %11i |\n", key, counter->count());
-        printf("| t:%-60s | %11i |\n", key, counter->sample_total());
-      } else {
-        printf("| %-62s | %11i |\n", key, counter->count());
+
+    if (i::FLAG_dump_counters_nvp) {
+      // Dump counters as name-value pairs.
+      for (j = 0; j < number_of_counters; j++) {
+        Counter* counter = counters[j].counter;
+        const char* key = counters[j].key;
+        if (counter->is_histogram()) {
+          printf("\"c:%s\"=%i\n", key, counter->count());
+          printf("\"t:%s\"=%i\n", key, counter->sample_total());
+        } else {
+          printf("\"%s\"=%i\n", key, counter->count());
+        }
       }
+    } else {
+      // Dump counters in formatted boxes.
+      printf(
+          "+----------------------------------------------------------------+"
+          "-------------+\n");
+      printf(
+          "| Name                                                           |"
+          " Value       |\n");
+      printf(
+          "+----------------------------------------------------------------+"
+          "-------------+\n");
+      for (j = 0; j < number_of_counters; j++) {
+        Counter* counter = counters[j].counter;
+        const char* key = counters[j].key;
+        if (counter->is_histogram()) {
+          printf("| c:%-60s | %11i |\n", key, counter->count());
+          printf("| t:%-60s | %11i |\n", key, counter->sample_total());
+        } else {
+          printf("| %-62s | %11i |\n", key, counter->count());
+        }
+      }
+      printf(
+          "+----------------------------------------------------------------+"
+          "-------------+\n");
     }
-    printf("+----------------------------------------------------------------+"
-           "-------------+\n");
     delete [] counters;
   }
 
   delete counters_file_;
   delete counter_map_;
 }
 
 
 
 static FILE* FOpen(const char* path, const char* mode) {
@@ skipping 1225 matching lines @@
   }
   create_params.array_buffer_allocator = Shell::array_buffer_allocator;
 #ifdef ENABLE_VTUNE_JIT_INTERFACE
   create_params.code_event_handler = vTune::GetVtuneCodeEventHandler();
 #endif
   create_params.constraints.ConfigureDefaults(
       base::SysInfo::AmountOfPhysicalMemory(),
       base::SysInfo::AmountOfVirtualMemory());
 
   Shell::counter_map_ = new CounterMap();
-  if (i::FLAG_dump_counters || i::FLAG_gc_stats) {
+  if (i::FLAG_dump_counters || i::FLAG_dump_counters_nvp || i::FLAG_gc_stats) {
     create_params.counter_lookup_callback = LookupCounter;
     create_params.create_histogram_callback = CreateHistogram;
     create_params.add_histogram_sample_callback = AddHistogramSample;
   }
 
   Isolate* isolate = Isolate::New(create_params);
   {
     Isolate::Scope scope(isolate);
     Initialize(isolate);
     PerIsolateData data(isolate);
@@ skipping 81 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif