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[interp] Rework frame data storage - #38085
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monojenkins
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BrzVlad,
CoffeeFlux,
alexischr,
lambdageek and
vargaz
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June 18, 2020 12:41
This PR has 2 objectives. First it makes the interp stack allocated in a single contiguous area of memory. This will enable us to do fast pointer bumping when switching between frames and not have to worry about scattered memory fragments. Second, it makes the stack space used by a frame (locals + execution stack) a compile time constant. This could prove useful for future optimizations, because we can tell at compile time at which stack offset every instruction outputs its result. In order to achieve this, localloc memory has been kicked out of the normal stack space into its own allocator, which is almost identical to the old stack fragment allocator.
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!! This PR is a copy of mono/mono#19985, please do not edit or review it in this repo !!
Do not automatically approve this PR:
* Consider how the changes affect configurations in this repo,
* Check effects on files that are not mirrored,
* Identify test cases that may be needed in this repo.
!! Merge the PR only after the original PR is merged !!
This PR has 2 objectives. First it makes the interp stack allocated in a single contiguous area of memory. This will enable us to do fast pointer bumping when switching between frames and not have to worry about scattered memory fragments. Second, it makes the stack space used by a frame (locals + execution stack) a compile time constant. This could prove useful for future optimizations, because we can tell at compile time at which stack offset every instruction outputs its result. In order to achieve this, localloc memory has been kicked out of the normal stack space into its own allocator, which is almost identical to the old stack fragment allocator.