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JavaScript:SpiderMonkey:GC Futures: Difference between revisions
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'''Benchmarks''' — | '''Benchmarks''' — Gregor is building a GC benchmark suite. We need it checked in. ({{bug|548388}}) | ||
''' | '''Benchmark automation''' — We need to be able to turn a crank and get GC performance numbers. Talos needs to run this automatically. This means we need to be able to measure GC performance in opt builds. Total time spent in GC and max pause time are cheap enough to collect. ({{bug|561486}}) | ||
'''Compartmentalize Gecko''' — Use the compartment API to divide up Gecko so that objects with different principals are always in different compartments. Use the wrapper API in XPConnect for our security wrappers. Fix what breaks. In particular, wrappers and the structured clone algorithm will need to copy strings and doubles instead of passing them freely from one compartment to another. | '''Compartments and wrappers API''' — Add API for creating a global object and associating it with a compartment. Add minimal API for a special kind of object that is allowed to hold a strong reference across compartments (a wrapper object). Add assertions within the engine that there are no direct references across compartments. Add assertions at API boundaries that all the gc-things provided as arguments come from the same compartment. ({{bug|563099}}) | ||
'''Compartmentalize Gecko''' — Use the compartment API to divide up Gecko so that objects with different principals are always in different compartments. Use the wrapper API in XPConnect for our security wrappers. Fix what breaks. In particular, wrappers and the structured clone algorithm will need to copy strings and doubles instead of passing them freely from one compartment to another. ({{bug|563106}}) | |||
'''GCSubheaps''' — Factor GC-related code into a class, js::GCHeap ({{bug|556324}}). Carve out a second class, GCSubheap, so that a single GCHeap can have several GCSubheaps, each of which handles its own set of VM pages from which individual GC things may be allocated. Give each compartment its own GCSubheap. Allocate every object, double, and string from the GCSubheap for the compartment where it will live. | '''GCSubheaps''' — Factor GC-related code into a class, js::GCHeap ({{bug|556324}}). Carve out a second class, GCSubheap, so that a single GCHeap can have several GCSubheaps, each of which handles its own set of VM pages from which individual GC things may be allocated. Give each compartment its own GCSubheap. Allocate every object, double, and string from the GCSubheap for the compartment where it will live. | ||