Thanks, I will have a look at it.

On Tuesday, August 11, 2015 at 12:21:19 PM UTC+3, Yang Guo wrote:
>
> V8 includes the methods Heap::TracePathToObjectFrom, 
> Heap::TracePathToObject and Heap::TracePathToGlobal in debug builds to help 
> with debugging with object reachability. Found paths are printed to stdout. 
> Maybe these methods can help?
>
> Yang
>
> On Thursday, August 6, 2015 at 6:02:43 PM UTC+2, Mihail Slavchev wrote:
>>
>> Hi guys,
>>
>> I work on NativeScript project and my team uses V8 to access Android APIs 
>> from JavaScript. In order to orchestrate V8/Dalvik garbage collectors dance 
>> I need to know whether a function creates a closure over an object. For 
>> example:
>>
>> var x = {
>>     f: function () { }
>> }
>>
>>
>> var y = {
>>     g: function () {
>>         x.f()
>>     }
>> }
>>
>>
>> In the example about I have weak callbacks (WeakCallbackData<T, 
>> P>::Callback) for both x and y object and during GC I need to know whether 
>> object x is reachable from object y. My current approach is built around 
>> v8::internal::ScopeInfo and v8::internal::Context::Lookup which played well 
>> until recently when we start observing app crashes mostly when we try to 
>> access the objects which we concluded belong to a closure.
>>
>> So far my approach is flawed and I am wondering is there a recommended 
>> way that I can use during GC so I can detect whether object x is reachable 
>> from object y. Any ideas are appreciated.
>>
>> TIA,
>> Mihail
>>
>>
>>

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