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LibWeb: Register Wasm memory grow hook in constructor of Memory objects

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Previously it would only register the hook for JavaScript constructed
Memory objects. This allows Ruffle to load again.
This commit is contained in:
Luke Wilde
2024-12-10 13:29:37 +00:00
committed by Ali Mohammad Pur
parent f2eaf3381f
commit d2acf32aae
3 changed files with 30 additions and 4 deletions
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9
Libraries/LibWeb/WebAssembly/Memory.cpp
View File

@@ -39,10 +39,6 @@ WebIDL::ExceptionOr<GC::Ref<Memory>> Memory::construct_impl(JS::Realm& realm, Me
auto memory_object = realm.create<Memory>(realm, *address, shared ? Shared::Yes : Shared::No);
cache.abstract_machine().store().get(*address)->successful_grow_hook = [memory_object] {
MUST(memory_object->reset_the_memory_buffer());
};
return memory_object;
}
@@ -51,6 +47,11 @@ Memory::Memory(JS::Realm& realm, Wasm::MemoryAddress address, Shared shared)
, m_address(address)
, m_shared(shared)
{
auto& cache = Detail::get_cache(realm);
cache.abstract_machine().store().get(address)->successful_grow_hook = [this] {
MUST(reset_the_memory_buffer());
};
}
void Memory::initialize(JS::Realm& realm)

3
Tests/LibWeb/Text/expected/Wasm/WebAssembly-grow-hook.txt Normal file
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@@ -0,0 +1,3 @@
Size before grow: 65536
Size after grow, before refresh: 0
Size after grow, after refresh: 131072

22
Tests/LibWeb/Text/input/Wasm/WebAssembly-grow-hook.html Normal file
View File

@@ -0,0 +1,22 @@
<!DOCTYPE html>
<script src="../include.js"></script>
<script>
asyncTest(async (done) => {
const arrayBuffer = new Uint8Array([
0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x04, 0x01, 0x60, 0x00, 0x00, 0x03, 0x02,
0x01, 0x00, 0x05, 0x04, 0x01, 0x01, 0x01, 0x02, 0x07, 0x11, 0x02, 0x06, 0x6d, 0x65, 0x6d, 0x6f,
0x72, 0x79, 0x02, 0x00, 0x04, 0x6d, 0x61, 0x69, 0x6e, 0x00, 0x00, 0x0a, 0x09, 0x01, 0x07, 0x00,
0x41, 0x01, 0x40, 0x00, 0x1a, 0x0b
]).buffer;
const wasm = await WebAssembly.instantiate(arrayBuffer, {});
let wasmMemoryBuffer = wasm.instance.exports.memory.buffer;
println(`Size before grow: ${wasmMemoryBuffer.byteLength}`);
wasm.instance.exports.main();
println(`Size after grow, before refresh: ${wasmMemoryBuffer.byteLength}`);
wasmMemoryBuffer = wasm.instance.exports.memory.buffer;
println(`Size after grow, after refresh: ${wasmMemoryBuffer.byteLength}`);
done();
});
</script>