[wasm] Use the JavaScript WasmModuleBuilder utility in JS tests.

test/mjsunit/wasm/calls.js

 // Copyright 2015 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");
 
-var module = (function () {
-  var kBodySize = 5;
-  var kNameOffset = kHeaderSize + 21 + kBodySize + 1;
+function assertModule(module, memsize) {
+  // Check the module exists.
+  assertFalse(module === undefined);
+  assertFalse(module === null);
+  assertFalse(module === 0);
+  assertEquals("object", typeof module);
 
-  return _WASMEXP_.instantiateModule(bytesWithHeader(
-    // -- memory
-    kDeclMemory,
-    1, 1, 1,
-    // -- signatures
-    kDeclSignatures, 1,
-    2, kAstI32, kAstI32, kAstI32, // int, int -> int
-    // -- functions
-    kDeclFunctions, 1,
-    kDeclFunctionName | kDeclFunctionExport,
-    0, 0,
-    kNameOffset, 0, 0, 0,         // name offset
-    kBodySize, 0,
-    // -- body
-    kExprI32Sub,                  // --
-    kExprGetLocal, 0,             // --
-    kExprGetLocal, 1,             // --
-    kDeclEnd,
-    's', 'u', 'b', 0              // name
-  ));
+  // Check the memory is an ArrayBuffer.
+  var mem = module.memory;
+  assertFalse(mem === undefined);
+  assertFalse(mem === null);
+  assertFalse(mem === 0);
+  assertEquals("object", typeof mem);
+  assertTrue(mem instanceof ArrayBuffer);
+  for (var i = 0; i < 4; i++) {
+    module.memory = 0;  // should be ignored
+    assertEquals(mem, module.memory);
+  }
+
+  assertEquals(memsize, module.memory.byteLength);
+}
+
+function assertFunction(module, func) {
+  assertEquals("object", typeof module.exports);
+
+  var exp = module.exports[func];
+  assertFalse(exp === undefined);
+  assertFalse(exp === null);
+  assertFalse(exp === 0);
+  assertEquals("function", typeof exp);
+
+  return exp;
+}
+
+(function SubTest() {
+
+  var builder = new WasmModuleBuilder();
+
+  builder.addMemory(1, 1, true);
+  builder.addFunction("sub", [kAstI32, kAstI32, kAstI32])
+    .addBody([
+      kExprI32Sub,                  // --
+      kExprGetLocal, 0,             // --
+      kExprGetLocal, 1])            // --
+    .exportFunc()
+
+  var module = builder.instantiate();
+  assertModule(module, 65536);

[ahaas, 2016/03/07 18:36:37]

use kMemSize here (or introduce it if it does not exist here yet.)

[titzer, 2016/03/07 19:11:05]

Done.

+
+  // Check the properties of the sub function.
+  var sub = assertFunction(module, "sub");
+  assertEquals(-55, sub(33, 88));
+  assertEquals(-55555, sub(33333, 88888));
+  assertEquals(-5555555, sub(3333333, 8888888));
 })();
 
-// Check the module exists.
-assertFalse(module === undefined);
-assertFalse(module === null);
-assertFalse(module === 0);
-assertEquals("object", typeof module);
 
-// Check the memory is an ArrayBuffer.
-var mem = module.memory;
-assertFalse(mem === undefined);
-assertFalse(mem === null);
-assertFalse(mem === 0);
-assertEquals("object", typeof mem);
-assertTrue(mem instanceof ArrayBuffer);
-for (var i = 0; i < 4; i++) {
-  module.memory = 0;  // should be ignored
-  assertEquals(mem, module.memory);
-}
+(function NopTest() {
 
-assertEquals(65536, module.memory.byteLength);
+  var builder = new WasmModuleBuilder();
 
-// Check the properties of the sub function.
-assertEquals("function", typeof module.sub);
+  builder.addMemory(2, 2, true);

[ahaas, 2016/03/07 18:36:38]

Are these "2"s here related to the "2" below in assertModule? If yes, then a
variable for it would be nice.

[titzer, 2016/03/07 19:11:05]

Done.

+  builder.addFunction("nop", [kAstStmt])
+    .addBody([kExprNop])
+    .exportFunc();
 
-assertEquals(-55, module.sub(33, 88));
-assertEquals(-55555, module.sub(33333, 88888));
-assertEquals(-5555555, module.sub(3333333, 8888888));
+  var module = builder.instantiate();
+  assertModule(module, 65536 * 2);
+
+  var nop = assertFunction(module, "nop");
+  assertEquals(undefined, nop());
+})();
 
 
-var module = (function() {
-  var kBodySize = 1;
-  var kNameOffset2 = kHeaderSize + 19 + kBodySize + 1;
+(function testLt() {
+  var builder = new WasmModuleBuilder();
 
-  return _WASMEXP_.instantiateModule(bytesWithHeader(
-    // -- memory
-    kDeclMemory,
-    1, 1, 1,
-    // -- signatures
-    kDeclSignatures, 1,
-    0, kAstStmt,                // signature: void -> void
-    // -- functions
-    kDeclFunctions, 1,
-    kDeclFunctionName | kDeclFunctionExport,
-    0, 0,                       // signature index
-    kNameOffset2, 0, 0, 0,      // name offset
-    kBodySize, 0,
-    kExprNop,                   // body
-    kDeclEnd,
-    'n', 'o', 'p', 0            // name
-  ));
+  builder.addMemory(3, 3, true);

[ahaas, 2016/03/07 18:36:37]

Same as above.

[titzer, 2016/03/07 19:11:05]

Done.

+  builder.addFunction("flt", [kAstI32, kAstF64, kAstF64])
+    .addBody([
+      kExprF64Lt,           // --
+      kExprGetLocal, 0,     // --
+      kExprGetLocal, 1])    // --
+    .exportFunc();
+
+  var module = builder.instantiate();
+  assertModule(module, 3 * 65536);
+
+  var flt = assertFunction(module, "flt");
+  assertEquals(1, flt(-2, -1));
+  assertEquals(0, flt(7.3, 7.1));
+  assertEquals(1, flt(7.1, 7.3));
 })();
-
-// Check the module exists.
-assertFalse(module === undefined);
-assertFalse(module === null);
-assertFalse(module === 0);
-assertEquals("object", typeof module);
-
-// Check the memory is an ArrayBuffer.
-var mem = module.memory;
-assertFalse(mem === undefined);
-assertFalse(mem === null);
-assertFalse(mem === 0);
-assertEquals("object", typeof mem);
-assertTrue(mem instanceof ArrayBuffer);
-for (var i = 0; i < 4; i++) {
-  module.memory = 0;  // should be ignored
-  assertEquals(mem, module.memory);
-}
-
-assertEquals(65536, module.memory.byteLength);
-
-// Check the properties of the sub function.
-assertFalse(module.nop === undefined);
-assertFalse(module.nop === null);
-assertFalse(module.nop === 0);
-assertEquals("function", typeof module.nop);
-
-assertEquals(undefined, module.nop());
-
-(function testLt() {
-  var kBodySize = 5;
-  var kNameOffset = kHeaderSize + 21 + kBodySize + 1;
-
-  var data = bytesWithHeader(
-    // -- memory
-    kDeclMemory,
-    1, 1, 1,
-    // -- signatures
-    kDeclSignatures, 1,
-    2, kAstI32, kAstF64, kAstF64, // (f64,f64)->int
-    // -- functions
-    kDeclFunctions, 1,
-    kDeclFunctionName | kDeclFunctionExport,
-    0, 0,                         // signature index
-    kNameOffset, 0, 0, 0,         // name offset
-    kBodySize, 0,
-    // -- body
-    kExprF64Lt,                   // --
-    kExprGetLocal, 0,             // --
-    kExprGetLocal, 1,             // --
-    kDeclEnd,
-    'f', 'l', 't', 0              // name
-  );
-
-  var module = _WASMEXP_.instantiateModule(data);
-
-  assertEquals("function", typeof module.flt);
-  assertEquals(1, module.flt(-2, -1));
-  assertEquals(0, module.flt(7.3, 7.1));
-  assertEquals(1, module.flt(7.1, 7.3));
-})();