[wasm] Encode function signatures, bodies, and names as separate sections.

test/mjsunit/wasm/test-wasm-module-builder.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');
 
-var debug = false;
+var debug = true;

[JF, 2016/03/09 22:02:44]

?

[titzer, 2016/03/09 22:03:57]

It's passed to the module builder to make it print. I'll flip it back.

 
 (function BasicTest() {
     var module = new WasmModuleBuilder();
     module.addMemory(1, 2, false);
     module.addFunction("foo", [kAstI32])
         .addBody([kExprI8Const, 11])
         .exportAs("blarg");
 
     var buffer = module.toBuffer(debug);
     var instance = Wasm.instantiateModule(buffer);
@@ skipping 123 matching lines @@
     var index = module.addImportWithModule("mod", "print", [kAstStmt, kAstI32]);
     module.addFunction("foo", [kAstStmt])
         .addBody([kExprCallImport, index, kExprI8Const, 19])
         .exportAs("main");
 
     var buffer = module.toBuffer(debug);
     var instance = Wasm.instantiateModule(buffer, {mod: {print: print}});
     print("should print 19! ");
     instance.exports.main();
 })();