[wasm] Master CL for Binary 0xC changes.

test/mjsunit/wasm/module-memory.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 --expose-gc --stress-compaction
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
 var kMemSize = 65536;
 
 function genModule(memory) {
   var builder = new WasmModuleBuilder();
 
   builder.addMemory(1, 1, true);
   builder.addFunction("main", kSig_i_i)
     .addBody([
-    // main body: while(i) { if(mem[i]) return -1; i -= 4; } return 0;
-      kExprLoop,
-        kExprGetLocal,0,
-        kExprIf,
-            kExprGetLocal,0,
-          kExprI32LoadMem,0,0,
-          kExprIf,
-            kExprI8Const,255,
-            kExprReturn, kArity1,
-          kExprEnd,
-              kExprGetLocal,0,
-              kExprI8Const,4,
-            kExprI32Sub,
-          kExprSetLocal,0,
-        kExprBr, kArity1, 1,
-        kExprEnd,
-      kExprEnd,
-      kExprI8Const,0
+      // main body: while(i) { if(mem[i]) return -1; i -= 4; } return 0;
+      // TODO(titzer): this manual bytecode has a copy of test-run-wasm.cc
+      /**/ kExprLoop, kAstStmt,            // --
+      /*  */ kExprGetLocal, 0,             // --
+      /*  */ kExprIf, kAstStmt,            // --
+      /*    */ kExprGetLocal, 0,           // --
+      /*    */ kExprI32LoadMem, 0, 0,      // --
+      /*    */ kExprIf, kAstStmt,          // --
+      /*      */ kExprI8Const, 255,        // --
+      /*      */ kExprReturn,              // --
+      /*      */ kExprEnd,                 // --
+      /*    */ kExprGetLocal, 0,           // --
+      /*    */ kExprI8Const, 4,            // --
+      /*    */ kExprI32Sub,                // --
+      /*    */ kExprSetLocal, 0,           // --
+      /*    */ kExprBr, 1,                 // --
+      /*    */ kExprEnd,                   // --
+      /*  */ kExprEnd,                     // --
+      /**/ kExprI8Const, 0                 // --
     ])
     .exportFunc();
-
-  return builder.instantiate(null, memory);
+  var module = builder.instantiate(null, memory);
+  assertTrue(module.exports.memory instanceof WebAssembly.Memory);
+  if (memory != null) assertEquals(memory, module.exports.memory.buffer);
+  return module;
 }
 
 function testPokeMemory() {
   var module = genModule(null);
-  var buffer = module.exports.memory;
+  var buffer = module.exports.memory.buffer;
   var main = module.exports.main;
   assertEquals(kMemSize, buffer.byteLength);
 
   var array = new Int8Array(buffer);
   assertEquals(kMemSize, array.length);
 
   for (var i = 0; i < kMemSize; i++) {
     assertEquals(0, array[i]);
   }
 
   for (var i = 0; i < 10; i++) {
     assertEquals(0, main(kMemSize - 4));
 
     array[kMemSize/2 + i] = 1;
     assertEquals(0, main(kMemSize/2 - 4));
     assertEquals(-1, main(kMemSize - 4));
 
     array[kMemSize/2 + i] = 0;
     assertEquals(0, main(kMemSize - 4));
   }
 }
 
 testPokeMemory();
 
+function genAndGetMain(buffer) {
+  return genModule(buffer).exports.main;  // to prevent intermediates living
+}
+
 function testSurvivalAcrossGc() {
-  var checker = genModule(null).exports.main;
-  for (var i = 0; i < 5; i++) {
+  var checker = genAndGetMain(null);
+  for (var i = 0; i < 3; i++) {
     print("gc run ", i);
     assertEquals(0, checker(kMemSize - 4));
     gc();
   }
 }
 
 testSurvivalAcrossGc();
 testSurvivalAcrossGc();
 testSurvivalAcrossGc();
 testSurvivalAcrossGc();
@@ skipping 21 matching lines @@
 
     array[kMemSize/2 + i] = 0;
     assertEquals(0, main(kMemSize - 4));
   }
 }
 
 testPokeOuterMemory();
 
 function testOuterMemorySurvivalAcrossGc() {
   var buffer = new ArrayBuffer(kMemSize);
-  var checker = genModule(buffer).exports.main;
-  for (var i = 0; i < 5; i++) {
+  var checker = genAndGetMain(buffer);
+  for (var i = 0; i < 3; i++) {
     print("gc run ", i);
     assertEquals(0, checker(kMemSize - 4));
     gc();
   }
 }
 
 testOuterMemorySurvivalAcrossGc();
 testOuterMemorySurvivalAcrossGc();
 testOuterMemorySurvivalAcrossGc();
 testOuterMemorySurvivalAcrossGc();
 
 
 function testOOBThrows() {
   var builder = new WasmModuleBuilder();
 
   builder.addMemory(1, 1, true);
   builder.addFunction("geti", kSig_i_ii)
     .addBody([
       kExprGetLocal, 0,
       kExprGetLocal, 1,
       kExprI32LoadMem, 0, 0,
-      kExprI32StoreMem, 0, 0
+      kExprI32StoreMem, 0, 0,
+      kExprGetLocal, 1,
+      kExprI32LoadMem, 0, 0,
     ])
     .exportFunc();
 
   var module = builder.instantiate();
   var offset;
 
   function read() { return module.exports.geti(0, offset); }
   function write() { return module.exports.geti(offset, 0); }
 
   for (offset = 0; offset < 65533; offset++) {
     assertEquals(0, read());
     assertEquals(0, write());
   }
 
 
   for (offset = 65534; offset < 66536; offset++) {
     assertTraps(kTrapMemOutOfBounds, read);
     assertTraps(kTrapMemOutOfBounds, write);
   }
 }
 
 testOOBThrows();