Upgrade V8 to 2.4.2

2 files changed, 66 insertions, 6 deletions

diff --git a/deps/v8/include/v8-profiler.h b/deps/v8/include/v8-profiler.h
index 9e3cb873c6..dd1b8caf7b 100644
--- a/deps/v8/include/v8-profiler.h
+++ b/deps/v8/include/v8-profiler.h
@@ -260,10 +260,17 @@ class V8EXPORT HeapGraphNode {
 
   /**
    * Returns node id. For the same heap object, the id remains the same
-   * across all snapshots.
+   * across all snapshots. Not applicable to aggregated heap snapshots
+   * as they only contain aggregated instances.
    */
   uint64_t GetId() const;
 
+  /**
+   * Returns the number of instances. Only applicable to aggregated
+   * heap snapshots.
+   */
+  int GetInstancesCount() const;
+
   /** Returns node's own size, in bytes. */
   int GetSelfSize() const;
 
@@ -313,6 +320,15 @@ class V8EXPORT HeapSnapshotsDiff {
  */
 class V8EXPORT HeapSnapshot {
  public:
+  enum Type {
+    kFull = 0,       // Heap snapshot with all instances and references.
+    kAggregated = 1  // Snapshot doesn't contain individual heap entries,
+                     //instead they are grouped by constructor name.
+  };
+
+  /** Returns heap snapshot type. */
+  Type GetType() const;
+
   /** Returns heap snapshot UID (assigned by the profiler.) */
   unsigned GetUid() const;
 
@@ -322,7 +338,10 @@ class V8EXPORT HeapSnapshot {
   /** Returns the root node of the heap graph. */
   const HeapGraphNode* GetRoot() const;
 
-  /** Returns a diff between this snapshot and another one. */
+  /**
+   * Returns a diff between this snapshot and another one. Only snapshots
+   * of the same type can be compared.
+   */
   const HeapSnapshotsDiff* CompareWith(const HeapSnapshot* snapshot) const;
 };
 
@@ -341,8 +360,13 @@ class V8EXPORT HeapProfiler {
   /** Returns a profile by uid. */
   static const HeapSnapshot* FindSnapshot(unsigned uid);
 
-  /** Takes a heap snapshot and returns it. Title may be an empty string. */
-  static const HeapSnapshot* TakeSnapshot(Handle<String> title);
+  /**
+   * Takes a heap snapshot and returns it. Title may be an empty string.
+   * See HeapSnapshot::Type for types description.
+   */
+  static const HeapSnapshot* TakeSnapshot(
+      Handle<String> title,
+      HeapSnapshot::Type type = HeapSnapshot::kFull);
 };
 
 
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index ff73226925..b89c244ca2 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -1763,8 +1763,6 @@ class V8EXPORT AccessorInfo {
 
 typedef Handle<Value> (*InvocationCallback)(const Arguments& args);
 
-typedef int (*LookupCallback)(Local<Object> self, Local<String> name);
-
 /**
  * NamedProperty[Getter|Setter] are used as interceptors on object.
  * See ObjectTemplate::SetNamedPropertyHandler.
@@ -2361,6 +2359,30 @@ typedef void* (*CreateHistogramCallback)(const char* name,
 
 typedef void (*AddHistogramSampleCallback)(void* histogram, int sample);
 
+// --- M e m o r y  A l l o c a t i o n   C a l l b a c k ---
+  enum ObjectSpace {
+    kObjectSpaceNewSpace = 1 << 0,
+    kObjectSpaceOldPointerSpace = 1 << 1,
+    kObjectSpaceOldDataSpace = 1 << 2,
+    kObjectSpaceCodeSpace = 1 << 3,
+    kObjectSpaceMapSpace = 1 << 4,
+    kObjectSpaceLoSpace = 1 << 5,
+
+    kObjectSpaceAll = kObjectSpaceNewSpace | kObjectSpaceOldPointerSpace |
+      kObjectSpaceOldDataSpace | kObjectSpaceCodeSpace | kObjectSpaceMapSpace |
+      kObjectSpaceLoSpace
+  };
+
+  enum AllocationAction {
+    kAllocationActionAllocate = 1 << 0,
+    kAllocationActionFree = 1 << 1,
+    kAllocationActionAll = kAllocationActionAllocate | kAllocationActionFree
+  };
+
+typedef void (*MemoryAllocationCallback)(ObjectSpace space,
+                                         AllocationAction action,
+                                         int size);
+
 // --- F a i l e d A c c e s s C h e c k C a l l b a c k ---
 typedef void (*FailedAccessCheckCallback)(Local<Object> target,
                                           AccessType type,
@@ -2581,6 +2603,20 @@ class V8EXPORT V8 {
   static void SetGlobalGCEpilogueCallback(GCCallback);
 
   /**
+   * Enables the host application to provide a mechanism to be notified
+   * and perform custom logging when V8 Allocates Executable Memory.
+   */
+  static void AddMemoryAllocationCallback(MemoryAllocationCallback callback,
+                                          ObjectSpace space,
+                                          AllocationAction action);
+
+  /**
+   * This function removes callback which was installed by
+   * AddMemoryAllocationCallback function.
+   */
+  static void RemoveMemoryAllocationCallback(MemoryAllocationCallback callback);
+
+  /**
    * Allows the host application to group objects together. If one
    * object in the group is alive, all objects in the group are alive.
    * After each garbage collection, object groups are removed. It is