Commits on Feb 5, 2014

1. src: update MakeCallback() function prototype …

   Make it possible to invoke MakeCallback() on a v8::Value but only for
   the variant that takes a v8::Function as the thing to call.
   
   The const char* and v8::String variants still require a v8::Object
   because the function to call is looked up as a property on the receiver,
   but that only works when the receiver is an object, not a primitive.

   

   bnoordhuis authored and tjfontaine committed Feb 5, 2014
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2. src: fix MakeCallback() handle leak …

   Create a new HandleScope before looking up the object context with
   v8::Object::CreationContext(), else we leak the Local<Context> into
   the current HandleScope.
   
   That's relatively harmless unless the HandleScope is long-lived and
   MakeCallback() is called a lot.  In a scenario like that, we may end
   up leaking a lot of memory.
   
   What is unfortunate about this change is that we're trying hard to
   eradicate the node_isolate global.  Longer term, we will probably have
   to change the MakeCallback() prototype to one that requires an explicit
   v8::Isolate* argument.

   

   bnoordhuis authored and tjfontaine committed Feb 5, 2014
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3. src: add tracing.v8.on('gc') statistics hooks …

   Add a new 'tracing' module with a v8 property that lets the user
   register listeners for gc events.  The listeners are invoked after
   every garbage collection cycle with 'before' and 'after' statistics.
   Useful for monitoring tools that want to keep track of memory usage.

   

   bnoordhuis authored and tjfontaine committed Feb 5, 2014
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4. src: add v8.getHeapStatistics() function …

   Add a one-to-one binding to v8::GetHeapStatistics().  Returns info on
   the current state of the JS heap, like total size and amount used.

   

   bnoordhuis authored and tjfontaine committed Feb 5, 2014
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5. doc: document the tracing api

   

   tjfontaine committed Feb 5, 2014
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