The finalizers associate each native object with a Dart object that owns
them. The finalizers need to be in native code, so I had to go back to
the old approach of linking Wasmer and my native code into a single .so.
TEST=I tried running the wasm tests using asan, but it didn't detect any
leaks even before the finalizers. So I put printfs in all the
set_finalizer and finalizer functions and manually verified that all the
finalizers were being run.
Bug: https://github.com/dart-lang/sdk/issues/37882
Change-Id: I38303ae0c6c446a23562c1b157c92ccc9af2dc34
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172680
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
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>
Since FFI doesn't support structs by value yet, this thin wrapper
library just provides versions of the import/export name functions that
return the name by pointer. Also, I've used these functions to allow
looking up functions by name, and added a function that prints a
module's imports and exports (which is handy for debugging).
Change-Id: Iff386e0b843bd8ab3763c99d3dc445ffedb12d6a
BUG: https://github.com/dart-lang/sdk/issues/37882
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161765
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
Add support for instantiating modules, getting their exported functions,
and calling those functions.
Function calling is tricky to implement, because we need to put the args
in an array to pass to wasm, and Dart doesn't have variadic functions.
So I implemented it by overriding noSuchMethod. Users can call
WasmFunction like a regular function, and the args will be dynamically
type checked and put in the array to pass to wasm.
WasmImports is a placeholder for now. Also, it's not possible to get
the function names until FFI supports passing structs by value, so for
now you can only get functions by their export index. If by-value
structs are delayed, I can add an intermediate C++ layer to the wasmer
library work around this.
Bug: https://github.com/dart-lang/sdk/issues/37882
Change-Id: I1214c96df324cfc9fc02a48bc09a269da1b8c6f6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/160144
Commit-Queue: Liam Appelbe <liama@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Liam Appelbe