With the decision to support non-nullable locals in WasmGC as per
https://github.com/WebAssembly/function-references/issues/44 the
support in dart2wasm for forcing all locals to be nullable is no
longer needed.
This CL removes that support and cleans up some related nullability
issues. Specifically:
- Remove the `--local-nullability` and `--parameter-nullability`
commandline options. These are now always enabled.
- Clean out special cases around forced nullable locals throughout the
compiler.
- Make `thisLocal` and `preciseThisLocal` always non-nullable.
- Make `returnValueLocal` (for storing the return value of `return`
statements inside `try` blocks with `finally`) always defaultable,
since its initialization flow crosses control constructs.
- Make type argument parameters non-nullable.
- Make non-nullable `FutureOr` translate to a non-nullable Wasm type.
- Implement the "initialized until end of block" validation scheme
in the Wasm instruction validator.
- Run tests with the `--experimental-wasm-nn-locals` option. This
is likely going away soon, but for now we need it.
Change-Id: I05873dd70510af5944d86d37cb5765c7bdef73a9
Cq-Include-Trybots: luci.dart.try:dart2wasm-linux-x64-d8-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/252600
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Joshua Litt <joshualitt@google.com>
Reviewed-by: William Hesse <whesse@google.com>
Also makes table type explicit and fixes a bug in element serialization
for tables beyond index 0.
Change-Id: I7c27071e00331c41010da771ae0075e798e457a9
Cq-Include-Trybots: luci.dart.try:dart2wasm-linux-x64-d8-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/247545
Reviewed-by: Joshua Litt <joshualitt@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
This matches the spec after anyref and externref were merged, and it's
necessary in order to use the latest Binaryen, which has removed support
for the old value.
Change-Id: I7f1bb5cb08637dd79fe975603d8e236d73ca4fdc
Cq-Include-Trybots: luci.dart.try:dart2wasm-linux-x64-d8-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/245375
Reviewed-by: Joshua Litt <joshualitt@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
This avoids a pathological case in some tests.
Change-Id: Ib713ad08eb613a709949bee07fa1e583e15cad9c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/245163
Reviewed-by: Joshua Litt <joshualitt@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Having first-class Wasm function references makes it possible to call
JS function objects directly from Dart, and to call some Dart functions
(static functions with no optional parameters and no type parameters)
from JS as function objects.
Change-Id: I1c788338d418c8857493ec76560d74fdd17d5dd2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/241001
Reviewed-by: Joshua Litt <joshualitt@google.com>
Reviewed-by: Jackson Gardner <jacksongardner@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Implements memory access through the `Pointer`, `Struct` and `Union` FFI
types. `Pointer` supports `fromAddress`, `address`, `elementAt`, `cast`,
`value`, `ref` (only getter), `[]`, `[]=` (not for structs and unions),
`==` and `hashCode`. Structs and unions support getters and setters for
their members.
`Pointer`, `Struct` and `Union` are all represented as `i32`, both
internally and in imports and exports. They currently don't have any
boxed representation, which means they can't be nullable (a `Pointer`
can still contain `nullptr` - the C null) and can't be assigned to
supertypes (i.e. `Object`, `dynamic`, type variables), stored in
containers nor passed as arguments or return values of local functions
or function expressions. To pass an FFI value in these situations, box
it manually by storing it in a field.
For the FFI integer types, only the explicitly sized versions (e.g.
`Int8`, `Uint32`) are supported.
Whenever the feature is used, the module will import a memory by the
name "ffi.memory", which will be accessed by the operations.
This also adds an optional commandline argument to `run_wasm.js` to
specify the module containing the FFI code. When such a module is
specified, it will be instantiated first, and its exports will appear as
imports to the Dart module under the "ffi" module name.
Change-Id: Ie55b072056f972b42db6b75e0c676944bbe88c1a
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/237686
Reviewed-by: Joshua Litt <joshualitt@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
This CL adds support for try, catch, throw, and rethrow. In addition, it
adds stack trace support. If functions have names then these will print
in the stack trace.
This CL flips an additional 53 tests to passing(5241 -> 5294). 1 test
which was passing on TOT now crashes at compile time due to
a missing language feature which is now reachable through compilation of
a catch block. A number of other tests flip from runtime errors to
compile time crashes due to similar issues.
Note: TryFinally is implemented in the follow on.
Change-Id: I740dd25c4e062e1be2f50bbd18d1302575dff6f1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/226808
Reviewed-by: Aske Simon Christensen <askesc@google.com>
Commit-Queue: Joshua Litt <joshualitt@google.com>
Change-Id: I7d74013b27625d0a5d3e4d3d8f83aa4859fb4892
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/233303
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
This is work in progress. Several language features are still
unimplemented or only partially implemented.
Instructions for running the compiler and its output can be found in
pkg/dart2wasm/dart2wasm.md. These procedures are preliminary and
expected to change.
The best version of d8 to use for this version of dart2wasm is 10.0.40,
as explained here: https://dart-review.googlesource.com/c/sdk/+/232097
This commit also adds a dart2wasm-hostasserts-linux-x64-d8 testing
configuration to run the compiler over the test suite.
The history of the prototype that this is based on can be seen here:
https://github.com/askeksa-google/sdk/tree/wasm_prototype
Issue: https://github.com/dart-lang/sdk/issues/32894
Change-Id: I910b6ff239ef9c5f66863e4ca97b39b8202cce85
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/175728
Reviewed-by: Joshua Litt <joshualitt@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
