The `field-offset` crate is unmaintained. When using its `offset_of!`
macro on a struct with a field of type `std::ptr::NonNull`, in release
mode, it generates a sigill.
This patch removes the `field-offset` crate, and implements a custom
`offset_of!` macro.
Host functions use `Context::External` with a `*mut vm::FuncCtx`
pointer, casted to `*mut vm::Ctx`. It creates a conflict with exports
that also use `Context::External`.
This patch introduces `Context::ExternalWithEnv` to create a specific
path in the code for an external context with `*mut vm::FuncEnv`.
This patch fixes all the `linking.wast` tests in the spectests.
In the `wrap` functions, we use `std::mem::transmute(&())` to get the
pointer to the value “around” `wrap` (`Fn` has a method `to_raw` which
declares a `wrap` function, which uses `transmute` to retrieve
`Fn`). This is an undefined behavior. It was working until the
`FuncCtx` is introduced. Since then, the undefined behavior was
causing an error with the Singlepass backend.
This patch stores the pointer to `Fn` in `func_env`, so that the
pointer to the user-defined host function is always predictable.
This patch allows host functions to get a signature without an
explicit `vm::Ctx` argument.
It is for Rust only. The C API receives a function pointer and has no
clue whether a `vm::Ctx` argument is present or not, so it assumes it
is always declared.
From the backend point of view, the pointer to `vm::Ctx` is always
inserted in the stack, but it is not used by the function when the
argument is absent.
This patch updates all the backends to use the definition of
`Trampoline` as defined in the `wasmer_runtime_core::typed_func`
module. That way, there is no copy of that type, and as such, it is
easier to avoid regression (a simple `cargo check` does the job).
This patch also formats the `use` statements in the updated files.
877: Reimplement F32Min, F32Max, F64Min and F64Max. r=nlewycky a=nlewycky
# Description
Reimplement F32Min, F32Max, F64Min and F64Max.
Adds XMM8--15 registers. Adds VMOVA, VBLEND and VXORP, and the VCMPUNORD and VCMPORD comparisons.
Fixes 419 test failures.
Co-authored-by: Nick Lewycky <nick@wasmer.io>
