Add a trace_gc_verbose flag....

src/heap.cc

 // Copyright 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 189 matching lines @@
 #elif defined(ENABLE_LOGGING_AND_PROFILING)
   if (FLAG_log_gc) {
     new_space_.CollectStatistics();
     new_space_.ReportStatistics();
     new_space_.ClearHistograms();
   }
 #endif
 }
 
 
+#if defined(ENABLE_LOGGING_AND_PROFILING)
+void Heap::PrintShortHeapStatistics() {
+  if (!FLAG_trace_gc_verbose) return;
+  PrintF("Memory allocator,   used: %8d, available: %8d\n",
+         MemoryAllocator::Size(), MemoryAllocator::Available());
+  PrintF("New space,          used: %8d, available: %8d\n",
+         Heap::new_space_.Size(), new_space_.Available());
+  PrintF("Old pointers,       used: %8d, available: %8d\n",
+         old_pointer_space_->Size(), old_pointer_space_->Available());
+  PrintF("Old data space,     used: %8d, available: %8d\n",
+         old_data_space_->Size(), old_data_space_->Available());
+  PrintF("Code space,         used: %8d, available: %8d\n",
+         code_space_->Size(), code_space_->Available());
+  PrintF("Map space,          used: %8d, available: %8d\n",
+         map_space_->Size(), map_space_->Available());
+  PrintF("Large object space, used: %8d, avaialble: %8d\n",
+         map_space_->Size(), map_space_->Available());
+}
+#endif
+
+
 // TODO(1238405): Combine the infrastructure for --heap-stats and
 // --log-gc to avoid the complicated preprocessor and flag testing.
 void Heap::ReportStatisticsAfterGC() {
   // Similar to the before GC, we use some complicated logic to ensure that
   // NewSpace statistics are logged exactly once when --log-gc is turned on.
 #if defined(DEBUG) && defined(ENABLE_LOGGING_AND_PROFILING)
   if (FLAG_heap_stats) {
     new_space_.CollectStatistics();
     ReportHeapStatistics("After GC");
   } else if (FLAG_log_gc) {
@@ skipping 3393 matching lines @@
 }
 
 
 GCTracer::~GCTracer() {
   if (!FLAG_trace_gc) return;
   // Printf ONE line iff flag is set.
   PrintF("%s %.1f -> %.1f MB, %d ms.\n",
          CollectorString(),
          start_size_, SizeOfHeapObjects(),
          static_cast<int>(OS::TimeCurrentMillis() - start_time_));
+
+#if defined(ENABLE_LOGGING_AND_PROFILING)
+  Heap::PrintShortHeapStatistics();
+#endif
 }
 
 
 const char* GCTracer::CollectorString() {
   switch (collector_) {
     case SCAVENGER:
       return "Scavenge";
     case MARK_COMPACTOR:
       return MarkCompactCollector::HasCompacted() ? "Mark-compact"
                                                   : "Mark-sweep";
@@ skipping 57 matching lines @@
 #ifdef DEBUG
 bool Heap::GarbageCollectionGreedyCheck() {
   ASSERT(FLAG_gc_greedy);
   if (Bootstrapper::IsActive()) return true;
   if (disallow_allocation_failure()) return true;
   return CollectGarbage(0, NEW_SPACE);
 }
 #endif
 
 } }  // namespace v8::internal