Alex Crichton 139b7a1aae Don't use the global stack for string lengths ... This commit updates the `Abi` associated type for all slice types to a `WasmSlice` type, an aggregate of two `u32` integers. This translates to an ABI where when passed as a function argument it expands to two integer arguments, and when passed as a return value it passes a return pointer as the first argument to get filled in. This is hopefully more forwards-compatible with the host bindings proposal which uses this strategy for passing string arguments at least. It's a little sketchy what we're doing as there's not really a stable ABI yet, but hopefully this'll all be relatively stable for awhile!		2018-05-02 21:03:50 -07:00
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all	Don't use the global stack for string lengths	2018-05-02 21:03:50 -07:00