Function setup

deps/v8/test/mjsunit/wasm/inlining-multi-instance.js:17–77

()

d8.file.execute("test/mjsunit/wasm/wasm-module-builder.js");

function setup() {
  const kInitialTableSize = 1;
  let sharedTable = new WebAssembly.Table({
    element: "anyfunc",
    initial: kInitialTableSize,
  });

  let builder = new WasmModuleBuilder();
  let type_i_v = builder.addType(kSig_i_v);
  builder.addImportedTable("env", "table", kInitialTableSize);
  // We use this global's value to differentiate which instance we are executing.
  let importedGlobal = builder.addImportedGlobal("env", "g", kWasmI32);
  builder
    .addFunction("callee", kSig_i_v)
    .addBody([kExprGlobalGet, importedGlobal, ...wasmI32Const(5), kExprI32Add])
    .exportFunc();
    builder
    .addFunction("call_indirect", type_i_v)
    .addBody([
      ...wasmI32Const(/* index of funcref in table */ 0),
      kExprCallIndirect, type_i_v, kTableZero,
    ])
    .exportFunc();
  builder
    .addFunction("return_call_indirect", type_i_v)
    .addBody([
      ...wasmI32Const(/* index of funcref in table */ 0),
      kExprReturnCallIndirect, type_i_v, kTableZero,
    ])
    .exportFunc();
  builder
    .addFunction("call_ref", type_i_v)
    .addBody([
      ...wasmI32Const(/* index of funcref in table */ 0),
      // This is essentially the same as for call_indirect above, just desugared.
      kExprTableGet, kTableZero,
      kGCPrefix, kExprRefCast, type_i_v,
      kExprCallRef, type_i_v,
    ])
    .exportFunc();
  let wasmModule = builder.toModule();

  // Both instances share the same table, but have different global values to
  // distinguish them.
  let instance1 = new WebAssembly.Instance(wasmModule, {
    env: {
      g: 1000,
      table: sharedTable,
    },
  });
  let instance2 = new WebAssembly.Instance(wasmModule, {
    env: {
      g: 2000,
      table: sharedTable,
    },
  });

  // And the table contains a reference to the function of the first instance.