The Dart exception is converted to a string, stored in a trap which
is passed through wasm, then converted back to a Dart exception.
Module instantiation can also throw a trap, because it internally
invokes the initialization function, if the module defines one. So I'm
handling this too.
Also, update to the new version of the wasm C API, which replaces some
foo_t** with foo_vec_t*.
Bug: https://github.com/dart-lang/sdk/issues/37882
Change-Id: I1e6952a191134734a892c42b2fb8ba3506bb0844
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169784
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
Enabling WASI when building an instance sets up the default WASI
imports, and can optionally capture stdout/stderr. I'd like to set up
something similar for stdin, but Wasmer doesn't support that yet.
I also improved error handling in WasmRuntime by adding Wasmer's last
error to the thrown exceptions where appropriate.
Bug: https://github.com/dart-lang/sdk/issues/37882
Change-Id: I2d8546e878bcb43c7093490eac085aa62d318e96
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/167904
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
Broadly speaking, the new API is very similar to the old one. The only
public facing change is that you can't make a memory by itself anymore.
You need to construct if from a store, which is owned by a module.
The new API no longer passes structs by value, so I was able to delete
the wasmer_wrapper.cc, and the files I had copied from the wasmer repo.
The new API is also a lot more verbose, so it made more sense to write
a script to generate the FFI boilerplate, rather that write it all
manually.
All the migrated tests that were passing before this refactor are still
passing.
Bug: https://github.com/dart-lang/sdk/issues/37882
Change-Id: I52ca54b982a27f1d851c630d3e09833b8810060c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/164081
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
Liam Appelbe