Revert of [wasm] WebAssembly.Memory object can be referenced by multiple Instance objects.

test/mjsunit/wasm/import-memory.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
 (function TestOne() {
@@ skipping 22 matching lines @@
   let memory = new WebAssembly.Memory({initial: 1});
   let i32 = new Int32Array(memory.buffer);
   let builder = new WasmModuleBuilder();
   builder.addImportedMemory("garg");
   builder.exportMemoryAs("daggle");
 
   let instance = builder.instantiate({garg: memory});
   assertSame(memory, instance.exports.daggle);
 })();
 
+
 (function TestImportExport() {
   print("TestImportExport");
   var i1;
   {
     let builder = new WasmModuleBuilder();
     builder.addMemory(1, 1, false);
     builder.exportMemoryAs("exported_mem");
     builder.addFunction("foo", kSig_i_i)
       .addBody([
         kExprGetLocal, 0,
@@ skipping 168 matching lines @@
       .exportFunc();
     instance = builder.instantiate({
       imported_mem: exp_instance.exports.exported_mem});
   }
   for (var i = initial_size; i < maximum_size; i++) {
     assertEquals(i, instance.exports.grow(1));
     assertEquals((i+1), instance.exports.mem_size());
   }
   assertEquals(-1, instance.exports.grow(1));
 })();
-
-(function TestMemoryGrowWebAssemblyInstances() {
-  print("TestMemoryGrowWebAssemblyInstances");
-  let memory = new WebAssembly.Memory({initial: 1, maximum: 15});
-  var builder = new WasmModuleBuilder();
-  builder.addImportedMemory("imported_mem");
-  builder.addFunction("mem_size", kSig_i_v)
-    .addBody([kExprMemorySize, kMemoryZero])
-    .exportAs("mem_size");
-  builder.addFunction("grow", kSig_i_i)
-    .addBody([kExprGetLocal, 0, kExprGrowMemory, kMemoryZero])
-    .exportFunc();
-  var module = new WebAssembly.Module(builder.toBuffer());
-  var instances = [];
-  for (var i = 0; i < 6; i++) {
-    instances.push(new WebAssembly.Instance(module, {imported_mem: memory}));
-  }
-  function verify_mem_size(expected_pages) {
-    assertEquals(expected_pages*kPageSize,
-        memory.buffer.byteLength);
-    for (var i = 0; i < 6; i++) {
-      assertEquals(expected_pages, instances[i].exports.mem_size());
-    }
-  }
-
-  // Verify initial memory size
-  verify_mem_size(1);
-
-  // Verify memory size with interleaving calls to Memory.grow,
-  // GrowMemory opcode.
-  var current_mem_size = 1;
-  for (var i = 0; i < 5; i++) {
-    function grow(pages) { return instances[i].exports.grow(pages); }
-    assertEquals(current_mem_size, memory.grow(1));
-    verify_mem_size(++current_mem_size);
-    assertEquals(current_mem_size, instances[i].exports.grow(1));
-    verify_mem_size(++current_mem_size);
-  }
-
-  assertThrows(() => memory.grow(5));
-})();
-
-(function TestImportedMemoryGrowMultipleInstances() {
-  print("TestImportMemoryMultipleInstances");
-  let memory = new WebAssembly.Memory({initial: 5, maximum: 100});
-  var builder = new WasmModuleBuilder();
-  builder.addImportedMemory("imported_mem");
-  builder.addFunction("mem_size", kSig_i_v)
-    .addBody([kExprMemorySize, kMemoryZero])
-    .exportFunc();
-  builder.addFunction("grow", kSig_i_i)
-    .addBody([kExprGetLocal, 0, kExprGrowMemory, kMemoryZero])
-    .exportFunc();
-  var instances = [];
-  for (var i = 0; i < 5; i++) {
-    instances.push(builder.instantiate({imported_mem: memory}));
-  }
-  function grow_instance_0(pages) { return instances[0].exports.grow(pages); }
-  function grow_instance_1(pages) { return instances[1].exports.grow(pages); }
-  function grow_instance_2(pages) { return instances[2].exports.grow(pages); }
-  function grow_instance_3(pages) { return instances[3].exports.grow(pages); }
-  function grow_instance_4(pages) { return instances[4].exports.grow(pages); }
-
-  function verify_mem_size(expected_pages) {
-    assertEquals(expected_pages*kPageSize, memory.buffer.byteLength);
-    for (var i = 0; i < 5; i++) {
-      assertEquals(expected_pages, instances[i].exports.mem_size());
-    }
-  }
-
-  // Verify initial memory size
-  verify_mem_size(5);
-
-  // Grow instance memory and buffer memory out of order and verify memory is
-  // updated correctly.
-  assertEquals(5, grow_instance_0(7));
-  verify_mem_size(12);
-
-  assertEquals(12, memory.grow(4));
-  verify_mem_size(16);
-
-  assertEquals(16, grow_instance_4(1));
-  verify_mem_size(17);
-
-  assertEquals(17, grow_instance_1(6));
-  verify_mem_size(23);
-
-  assertEquals(23, grow_instance_3(2));
-  verify_mem_size(25);
-
-  assertEquals(25, memory.grow(10));
-  verify_mem_size(35);
-
-  assertEquals(35, grow_instance_2(15));
-  verify_mem_size(50);
-  assertThrows(() => memory.grow(51));
-})();
-
-(function TestExportImportedMemoryGrowMultipleInstances() {
-  // TODO(gdeepti):Exported memory objects currently do not take max_size
-  // into account so this can grow past the maximum specified in the exported
-  // memory object. Assert that growing past maximum for exported objects fails.
-  print("TestExportImportedMemoryGrowMultipleInstances");
-  var instance;
-  {
-    let builder = new WasmModuleBuilder();
-    builder.addMemory(1, 11, true);
-    builder.exportMemoryAs("exported_mem");
-    builder.addFunction("mem_size", kSig_i_v)
-      .addBody([kExprMemorySize, kMemoryZero])
-      .exportFunc();
-    instance = builder.instantiate();
-  }
-  var builder = new WasmModuleBuilder();
-  builder.addImportedMemory("imported_mem");
-  builder.addFunction("mem_size", kSig_i_v)
-    .addBody([kExprMemorySize, kMemoryZero])
-    .exportFunc();
-  builder.addFunction("grow", kSig_i_i)
-    .addBody([kExprGetLocal, 0, kExprGrowMemory, kMemoryZero])
-    .exportFunc();
-  var instances = [];
-  for (var i = 0; i < 10; i++) {
-    instances.push(builder.instantiate({
-      imported_mem: instance.exports.exported_mem}));
-  }
-  function verify_mem_size(expected_pages) {
-    for (var i = 0; i < 10; i++) {
-      assertEquals(expected_pages, instances[i].exports.mem_size());
-    }
-  }
-  var current_mem_size = 1;
-  for (var i = 0; i < 10; i++) {
-    function grow(pages) { return instances[i].exports.grow(pages); }
-    assertEquals(current_mem_size, instances[i].exports.grow(1));
-    verify_mem_size(++current_mem_size);
-  }
-})();