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Justin Ethier 2016-02-29 23:09:20 -05:00
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docs/Garbage-Collector.md
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@ -195,9 +195,11 @@ This function is called by a mutator to allocate memory on the heap for an objec
A write barrier is used to ensure any modified objects are properly marked for the current collection cycle. There are two cases:
- Gray the object's new and old values if the mutator is in a synchronous status. Graying of the new value is a special case since it may still be on the stack. Instead of marking it directly, the object is tagged to be grayed when it is relocated to the heap.
- Gray the object's new and old values if the mutator is in a synchronous status.
- Gray the object's old value if the collector is in the tracing stage.
Because updates can occur at any time a modified object may still live on the stack. In this case the object is tagged to be grayed when it is relocated to the heap.
### Cooperate
Each mutator is required to periodically call this function to cooperate with the collector. During cooperation a mutator will update its status to match the collector's status, to handshake with the collector.