Split nodes and edges into separate arrays in heap profiler.

src/profile-generator-inl.h

Index: src/profile-generator-inl.h
diff --git a/src/profile-generator-inl.h b/src/profile-generator-inl.h
index 284e2dfa361af19df6f6f8cf159dbb977d612922..70b9ef30c9e6d2b1ad8a8d0827d2d97c47cae0bc 100644
--- a/src/profile-generator-inl.h
+++ b/src/profile-generator-inl.h
@@ -96,8 +96,35 @@ CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
 
 
 HeapEntry* HeapGraphEdge::from() const {
-  return const_cast<HeapEntry*>(
-      reinterpret_cast<const HeapEntry*>(this - child_index_) - 1);
+  return &snapshot()->entries()[from_];
+}
+
+
+HeapSnapshot* HeapGraphEdge::snapshot() const {
+  return to_entry_->snapshot();
+}
+
+
+int HeapEntry::index() const {
+  return this - &snapshot_->entries().first();

[mnaganov (inactive), 2012/05/03 15:44:31]

I'm not sure this will compile on all platforms. Have you checked Win64 for
example?

[alexeif, 2012/05/07 11:04:35]

I'm not sure, as I don't have a Windows machine. I added a cast anyway.

+}
+
+
+HeapGraphEdge** HeapEntry::children_arr() {
+  ASSERT(children_index_ >= 0);
+  return &snapshot_->children()[children_index_];
+}
+
+
+HeapGraphEdge** HeapEntry::retainers_arr() {
+  ASSERT(retainers_index_ >= 0);
+  return &snapshot_->retainers()[retainers_index_];
+}
+
+
+HeapEntry* HeapEntry::dominator() const {
+  ASSERT(dominator_ >= 0);
+  return &snapshot_->entries()[dominator_];
 }