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by _f5ah
770 days ago
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A couple months ago I finished translating a simple generational garbage collector from MIPS[1] to x86-64 assembly[2], so that programms emitted by my toy compiler[3] run on the actual hardware instead of a MIPS emulator. And sure enough, I had introduced a few bugs along the way. Here is a part of just one commit message: > NoLeak-InsertionSort.cool exposed a problem where we make a copy of a prototype object
to pass it as `this` to the constructor. But while evaluating all the other constructor
parameters the copy gets promoted to Old Area. As a result any assignments the constructor
makes end up recorded in the assignment stack. So that the referenced objects survive the
next minor collection whereas they shouldn't have otherwise. [1]: https://theory.stanford.edu/~aiken/software/cooldist/lib/tra... [2]: https://github.com/mykolav/coollang-2020-fs/blob/master/src/... [3]: https://github.com/mykolav/coollang-2020-fs |
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