ea3306e74c
Currently the runtime needs to acquire the current stack pointer so it can set a limit for where if the wasm stack goes below that point it will abort the wasm code. Acquiring the stack pointer is done in a brittle way right now which involves looking at the address of what we hope is an on-stack structure. This turns out to not work at all with ASan as well. Instead this commit switches to the `psm` crate which is used by the Rust compiler team for stack manipulation, namely a coarse version of segmented stacks to avoid stack overflow in the compiler. We don't need most of the implementation of `psm`, just the `stack_pointer` function, but it shouldn't be a burden to bring in! Closes #2344
This is the wasmtime-runtime crate, which contains wasm runtime library
support, supporting the wasm ABI used by wasmtime-environ,
wasmtime-jit, and wasmtime-obj.
This crate does not make a host vs. target distinction; it is meant to be compiled for the target.
Most users will want to use the main wasmtime crate instead of using this
crate directly.