mirror of
https://github.com/RGBCube/serenity
synced 2025-07-26 19:47:46 +00:00
LibWasm: Implement a very basic linker
This will simply "link" any given module instances and produce a list of external values that can be used to instantiate a module. Note that this is extremely basic and cannot resolve circular dependencies, and depends on the instance order.
This commit is contained in:
parent
3283c8a495
commit
35b3ae26ed
3 changed files with 206 additions and 15 deletions
|
@ -6,6 +6,8 @@
|
|||
|
||||
#pragma once
|
||||
|
||||
#include <AK/HashMap.h>
|
||||
#include <AK/HashTable.h>
|
||||
#include <AK/OwnPtr.h>
|
||||
#include <AK/Result.h>
|
||||
#include <LibWasm/Types.h>
|
||||
|
@ -15,6 +17,13 @@ namespace Wasm {
|
|||
struct InstantiationError {
|
||||
String error { "Unknown error" };
|
||||
};
|
||||
struct LinkError {
|
||||
enum OtherErrors {
|
||||
InvalidImportedModule,
|
||||
};
|
||||
Vector<String> missing_imports;
|
||||
Vector<OtherErrors> other_errors;
|
||||
};
|
||||
|
||||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(u64, true, true, false, false, false, true, FunctionAddress);
|
||||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(u64, true, true, false, false, false, true, ExternAddress);
|
||||
|
@ -436,4 +445,42 @@ private:
|
|||
Store m_store;
|
||||
};
|
||||
|
||||
class Linker {
|
||||
public:
|
||||
struct Name {
|
||||
String module;
|
||||
String name;
|
||||
ImportSection::Import::ImportDesc type;
|
||||
};
|
||||
|
||||
explicit Linker(const Module& module)
|
||||
: m_module(module)
|
||||
{
|
||||
}
|
||||
|
||||
// Link a module, the import 'module name' is ignored with this.
|
||||
void link(const ModuleInstance&);
|
||||
|
||||
// Link a bunch of qualified values, also matches 'module name'.
|
||||
void link(const HashMap<Name, ExternValue>&);
|
||||
|
||||
AK::Result<Vector<ExternValue>, LinkError> finish();
|
||||
|
||||
private:
|
||||
void populate();
|
||||
|
||||
const Module& m_module;
|
||||
HashMap<Name, ExternValue> m_resolved_imports;
|
||||
HashTable<Name> m_unresolved_imports;
|
||||
Vector<Name> m_ordered_imports;
|
||||
Optional<LinkError> m_error;
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
template<>
|
||||
struct AK::Traits<Wasm::Linker::Name> : public AK::GenericTraits<Wasm::Linker::Name> {
|
||||
static constexpr bool is_trivial() { return false; }
|
||||
static unsigned hash(const Wasm::Linker::Name& entry) { return pair_int_hash(entry.module.hash(), entry.name.hash()); }
|
||||
static bool equals(const Wasm::Linker::Name& a, const Wasm::Linker::Name& b) { return a.name == b.name && a.module == b.module; }
|
||||
};
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue