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mmtk/src/scanning.rs
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| pub unsafe fn mmtk_scan_gcstack_roots<EV: EdgeVisitor<JuliaVMEdge>>( |
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This function looks very similar to the old mmtk_scan_gcstack. How is it different? Can you reduce duplicated code between those two functions?
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The main difference is that mmtk_scan_gcstack uses a single closure (as it's called when scanning objects) and mmtk_scan_gcstack_roots uses two closures (one for transitively pinned roots, and another for pinning roots). I tried using a single function, but I didn't find any way to call it with a single closure when scanning objects - if I try passing a single closure as both arguments, the rust compiler complains about having two mutable references of the closure.
Maybe I found a way. Will push it.
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Supporting processing roots in the shadow stack that are not transitively pinned (only the root object is pinned), and therefore should enable moving more objects.
NB: Should be merged with mmtk/julia#43.