[Merged by Bors] - Improve the design of ephemerons in our GC #2530
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jedel1043
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Test262 conformance changes
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@@ Coverage Diff @@
## main #2530 +/- ##
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+ Coverage 49.99% 50.15% +0.16%
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Files 379 379
Lines 37642 37660 +18
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+ Hits 18819 18889 +70
+ Misses 18823 18771 -52
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nekevss
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Jan 14, 2023
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I'm going to try and look at this in more depth and play around with it this weekend, but I wanted to leave some early comments.
On the topic of improvements/clarity changes, I was thinking about the current names of some structs. In particular, thoughts on switching GcCell to GcRefCell, GcCellRef to GcRef, and GcCellRefMut to GcRefMut?
nekevss
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Jan 14, 2023
nekevss
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Jan 14, 2023
I like it! The current names make |
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This PR changes the following: - Modifies `EphemeronBox` to be more akin to `GcBox`, with its own header, roots and markers. This also makes it more similar to [Racket's](https://docs.racket-lang.org/reference/ephemerons.html) implementation. - Removes `EPHEMERON_QUEUE`. - Ephemerons are now tracked on a special `weak_start` linked list, instead of `strong_start` which is where all other GC boxes live. - Documents all unsafe blocks. - Documents our current garbage collection algorithm. I hope this'll clarify a bit what exactly are we doing on every garbage collection. - Renames/removes some functions.
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This PR changes the following: - Modifies `EphemeronBox` to be more akin to `GcBox`, with its own header, roots and markers. This also makes it more similar to [Racket's](https://docs.racket-lang.org/reference/ephemerons.html) implementation. - Removes `EPHEMERON_QUEUE`. - Ephemerons are now tracked on a special `weak_start` linked list, instead of `strong_start` which is where all other GC boxes live. - Documents all unsafe blocks. - Documents our current garbage collection algorithm. I hope this'll clarify a bit what exactly are we doing on every garbage collection. - Renames/removes some functions.
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This PR changes the following:
EphemeronBoxto be more akin toGcBox, with its own header, roots and markers. This also makes it more similar to Racket's implementation.EPHEMERON_QUEUE.weak_startlinked list, instead ofstrong_startwhich is where all other GC boxes live.