Added zone tracing

src/isolate.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 "src/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 1917 matching lines @@
 #define TRACE_ISOLATE(tag)
 #endif
 
 class VerboseAccountingAllocator : public AccountingAllocator {
  public:
   VerboseAccountingAllocator(Heap* heap, size_t allocation_sample_bytes,
                              size_t pool_sample_bytes)
       : heap_(heap),
         last_memory_usage_(0),
         last_pool_size_(0),
+        nesting_deepth_(0),
         allocation_sample_bytes_(allocation_sample_bytes),
         pool_sample_bytes_(pool_sample_bytes) {}
 
   v8::internal::Segment* GetSegment(size_t size) override {
     v8::internal::Segment* memory = AccountingAllocator::GetSegment(size);
     if (memory) {
       size_t malloced_current = GetCurrentMemoryUsage();
       size_t pooled_current = GetCurrentPoolSize();
 
       if (last_memory_usage_.Value() + allocation_sample_bytes_ <
               malloced_current ||
           last_pool_size_.Value() + pool_sample_bytes_ < pooled_current) {
-        PrintJSON(malloced_current, pooled_current);
+        PrintMemoryJSON(malloced_current, pooled_current);
         last_memory_usage_.SetValue(malloced_current);
         last_pool_size_.SetValue(pooled_current);
       }
     }
     return memory;
   }
 
   void ReturnSegment(v8::internal::Segment* memory) override {
     AccountingAllocator::ReturnSegment(memory);
     size_t malloced_current = GetCurrentMemoryUsage();
     size_t pooled_current = GetCurrentPoolSize();
 
     if (malloced_current + allocation_sample_bytes_ <
             last_memory_usage_.Value() ||
         pooled_current + pool_sample_bytes_ < last_pool_size_.Value()) {
-      PrintJSON(malloced_current, pooled_current);
+      PrintMemoryJSON(malloced_current, pooled_current);
       last_memory_usage_.SetValue(malloced_current);
       last_pool_size_.SetValue(pooled_current);
     }
   }
 
+  void ZoneCreation(const Zone* zone) override {
+    double time = heap_->isolate()->time_millis_since_init();
+    PrintF(
+        "{"
+        "\"type\": \"zonecreation\", "
+        "\"isolate\": \"%p\", "
+        "\"time\": %f, "
+        "\"ptr\": \"%p\", "
+        "\"name\": \"%s\","
+        "\"nesting\": %zu"
+        "}\n",
+        reinterpret_cast<void*>(heap_->isolate()), time,
+        reinterpret_cast<const void*>(zone), zone->name(),
+        base::NoBarrier_Load(&nesting_deepth_));
+    base::NoBarrier_AtomicIncrement(&nesting_deepth_, 1);
+  }
+
+  void ZoneDestruction(const Zone* zone) override {
+    base::NoBarrier_AtomicIncrement(&nesting_deepth_, -1);
+    double time = heap_->isolate()->time_millis_since_init();
+    PrintF(
+        "{"
+        "\"type\": \"zonedestruction\", "
+        "\"isolate\": \"%p\", "
+        "\"time\": %f, "
+        "\"ptr\": \"%p\", "
+        "\"name\": \"%s\", "
+        "\"size\": %zu,"
+        "\"nesting\": %zu"
+        "}\n",
+        reinterpret_cast<void*>(heap_->isolate()), time,
+        reinterpret_cast<const void*>(zone), zone->name(),
+        zone->allocation_size(), base::NoBarrier_Load(&nesting_deepth_));
+  }
+
  private:
-  void PrintJSON(size_t malloced, size_t pooled) {
+  void PrintMemoryJSON(size_t malloced, size_t pooled) {
     // Note: Neither isolate, nor heap is locked, so be careful with accesses
     // as the allocator is potentially used on a concurrent thread.
     double time = heap_->isolate()->time_millis_since_init();
     PrintF(
         "{"
         "\"type\": \"zone\", "
         "\"isolate\": \"%p\", "
         "\"time\": %f, "
         "\"allocated\": %zu,"
         "\"pooled\": %zu"
         "}\n",
         reinterpret_cast<void*>(heap_->isolate()), time, malloced, pooled);
   }
 
   Heap* heap_;
   base::AtomicNumber<size_t> last_memory_usage_;
   base::AtomicNumber<size_t> last_pool_size_;
+  base::AtomicWord nesting_deepth_;

[Michael Lippautz, 2016/10/11 11:25:19]

You should use base::AtomicNumber<size_t/intptr_t> here.

   size_t allocation_sample_bytes_, pool_sample_bytes_;
 };
 
 Isolate::Isolate(bool enable_serializer)
     : embedder_data_(),
       entry_stack_(NULL),
       stack_trace_nesting_level_(0),
       incomplete_message_(NULL),
       bootstrapper_(NULL),
       runtime_profiler_(NULL),
@@ skipping 1326 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8