Add Metrics for heap high water marks

runtime/vm/scavenger.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/scavenger.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 
@@ skipping 397 matching lines @@
   // going to use for forwarding pointers.
   ASSERT(Object::tags_offset() == 0);
 
   // Set initial size resulting in a total of three different levels.
   const intptr_t initial_semi_capacity_in_words = max_semi_capacity_in_words /
       (FLAG_new_gen_growth_factor * FLAG_new_gen_growth_factor);
   to_ = SemiSpace::New(initial_semi_capacity_in_words);
   if (to_ == NULL) {
     FATAL("Out of memory.\n");
   }
-
+  UpdateMaxHeapCapacity();
   // Setup local fields.
   top_ = FirstObjectStart();
   resolved_top_ = top_;
   end_ = to_->end();
 
   survivor_end_ = FirstObjectStart();
 }
 
 
 Scavenger::~Scavenger() {
@@ skipping 23 matching lines @@
   Thread::PrepareForGC();
   // Flip the two semi-spaces so that to_ is always the space for allocating
   // objects.
   SemiSpace* from = to_;
   to_ = SemiSpace::New(NewSizeInWords(from->size_in_words()));
   if (to_ == NULL) {
     // TODO(koda): We could try to recover (collect old space, wait for another
     // isolate to finish scavenge, etc.).
     FATAL("Out of memory.\n");
   }
+  UpdateMaxHeapCapacity();
   top_ = FirstObjectStart();
   resolved_top_ = top_;
   end_ = to_->end();
   return from;
 }
 
 
 void Scavenger::Epilogue(Isolate* isolate,
                          SemiSpace* from,
                          bool invoke_api_callbacks) {
@@ skipping 226 matching lines @@
     }
     while (!delayed_weak_stack->is_empty()) {
       // Pop the delayed weak object from the stack and visit its pointers.
       RawObject* weak_property = delayed_weak_stack->RemoveLast();
       weak_property->VisitPointers(visitor);
     }
   }
 }
 
 
+void Scavenger::UpdateMaxHeapCapacity() {
+  if (heap_ == NULL) {
+    // Some unit tests.
+    return;
+  }
+  ASSERT(to_ != NULL);
+  ASSERT(heap_ != NULL);
+  Isolate* isolate = heap_->isolate();
+  ASSERT(isolate != NULL);
+  isolate->GetHeapNewCapacityMaxMetric()->SetValue(
+      to_->size_in_words() * kWordSize);
+}
+
+
 uword Scavenger::ProcessWeakProperty(RawWeakProperty* raw_weak,
                                      ScavengerVisitor* visitor) {
   // The fate of the weak property is determined by its key.
   RawObject* raw_key = raw_weak->ptr()->key_;
   if (raw_key->IsHeapObject() && raw_key->IsNewObject()) {
     uword raw_addr = RawObject::ToAddr(raw_key);
     uword header = *reinterpret_cast<uword*>(raw_addr);
     if (!IsForwarding(header)) {
       // Key is white.  Delay the weak property.
       visitor->DelayWeakProperty(raw_weak);
@@ skipping 196 matching lines @@
 }
 
 
 void Scavenger::FreeExternal(intptr_t size) {
   ASSERT(size >= 0);
   external_size_ -= size;
   ASSERT(external_size_ >= 0);
 }
 
 }  // namespace dart