CHAIN LIES

note: this requires a version of wabt which doesn't exist yet, see
WebAssembly/wabt#2622

Author: bfredl

wasm_anon/build.zig

@@ -125,6 +125,7 @@ pub fn build(b: *std.Build) void {
             .{ "store", 0, null },
             .{ "call", 2, null },
             .{ "global", 0, null },
+            .{ "gc/array", 0, null },
         };
         for (upstream_specs) |item| {
             const name, const fail, const heavy = item;

wasm_anon/src/Module.zig

@@ -447,13 +447,18 @@ pub fn element_section(self: *Module, in: *Instance) !void {
     dbg("Elements: {}\n", .{len});
     for (0..len) |_| {
         const kinda = try r.readu();
-        if (kinda == 0) {
+        if (kinda == 0 or kinda == 4) {
             const offset: usize = @intCast((try Interpreter.eval_constant_expr(&r, .i32, in.preglobals(), self.allocator)).i32);
             const elen = try r.readu();
             if (offset + len > in.funcref_table.len) {
                 return error.InvalidFormat;
             }
             for (0..elen) |i| {
+                if (kinda == 4) {
+                    const wat = try r.readByte();
+                    if (wat != 0xd2) @panic("TODO :D");
+                }
+
                 const item = try r.readu();
                 if (item >= self.funcs_internal.len + self.n_funcs_import) return error.InvalidFormat;
                 in.funcref_table[offset + i] = item;

wasm_anon/src/wast_runner.zig

@@ -558,7 +558,7 @@ const Tokenizer = struct {
 };
 
 fn wat2wasm(source: []const u8, allocator: std.mem.Allocator) ![]u8 {
-    const argv = &[_][]const u8{ "wat2wasm", "--enable-all", "-", "--output=-" };
+    const argv = &[_][]const u8{ "wat2wasm", "--enable-extended-const", "--enable-gc", "-", "--output=-" };
 
     const Child = std.process.Child;
     var child: Child = .init(argv, allocator);