wasm: add support of wasmtime for webassembly sandbox #47
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Signed-off-by: Abel Feng <fshb1988@gmail.com>
The crate of "mach" which is indirectly dependence introduces by wasmtime-runtime, is in the license of BSD-2-Clause, we have to allow it, otherwise we can not use wasmtime. The Modified or New BSD (or BSD 3-clause) license is the same as BSD-2, but with an additional clause prohibiting the names of the authors from being used to endorse or promote products relating to the software. As BSD-3-Clause is allowed, we have to reason to deny BSD-2-Clause Signed-off-by: Abel Feng <fshb1988@gmail.com>
otherwise some checks my get a name confliction error because some functions is implemented in different features, and annotated by the feature. Signed-off-by: Abel Feng <fshb1988@gmail.com>
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Vanient
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Vanient
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support wasmtime as the wasm runtime for webassembly sandbox.
it use async feature of wasmtime and launch the instance inside the process, without forking a new process.
and the limit of memory is supported by wasmtime ResourceLimiter.
the cpu limitation of wasmtime is made by a "fuel" machanism and I am not sure how to make it follow the cpu quota limitation of containers. so cpu limitation is still not supported.