[wasm] Implement an interpreter for WASM.

test/unittests/wasm/ast-decoder-unittest.cc

 // 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.
 
 #include "test/unittests/test-utils.h"
 
 #include "src/v8.h"
 
 #include "test/cctest/wasm/test-signatures.h"
 
@@ skipping 64 matching lines @@
   LocalDeclEncoder local_decls;
 
   void AddLocals(LocalType type, uint32_t count) {
     local_decls.AddLocals(count, type);
   }
 
   // Prepends local variable declarations and renders nice error messages for
   // verification failures.
   void Verify(ErrorCode expected, FunctionSig* sig, const byte* start,
               const byte* end) {
-    local_decls.Prepend(&start, &end);
+    local_decls.Prepend(zone(), &start, &end);
     // Verify the code.
     TreeResult result =
         VerifyWasmCode(zone()->allocator(), module, sig, start, end);
 
     if (result.error_code != expected) {
       ptrdiff_t pc = result.error_pc - result.start;
       ptrdiff_t pt = result.error_pt - result.start;
       std::ostringstream str;
       if (expected == kSuccess) {
         str << "Verification failed: " << result.error_code << " pc = +" << pc;
         if (result.error_pt) str << ", pt = +" << pt;
         str << ", msg = " << result.error_msg.get();
       } else {
         str << "Verification expected: " << expected << ", but got "
             << result.error_code;
         if (result.error_code != kSuccess) {
           str << " pc = +" << pc;
           if (result.error_pt) str << ", pt = +" << pt;
         }
       }
       FATAL(str.str().c_str());
     }
-
-    delete[] start;  // local_decls.Prepend() allocated a new buffer.
   }
 
   void TestBinop(WasmOpcode opcode, FunctionSig* success) {
     // op(local[0], local[1])
     byte code[] = {WASM_BINOP(opcode, WASM_GET_LOCAL(0), WASM_GET_LOCAL(1))};
     EXPECT_VERIFIES(success, code);
 
     // Try all combinations of return and parameter types.
     for (size_t i = 0; i < arraysize(kLocalTypes); i++) {
       for (size_t j = 0; j < arraysize(kLocalTypes); j++) {
@@ skipping 2300 matching lines @@
 }
 
 TEST_F(LocalDeclDecoderTest, UseEncoder) {
   const byte* data = nullptr;
   const byte* end = nullptr;
   LocalDeclEncoder local_decls(zone());
 
   local_decls.AddLocals(5, kAstF32);
   local_decls.AddLocals(1337, kAstI32);
   local_decls.AddLocals(212, kAstI64);
-  local_decls.Prepend(&data, &end);
+  local_decls.Prepend(zone(), &data, &end);
 
   AstLocalDecls decls(zone());
   bool result = DecodeLocalDecls(decls, data, end);
   EXPECT_TRUE(result);
   EXPECT_EQ(5 + 1337 + 212, decls.total_local_count);
 
   LocalTypeMap map = Expand(decls);
   size_t pos = 0;
   pos = ExpectRun(map, pos, kAstF32, 5);
   pos = ExpectRun(map, pos, kAstI32, 1337);
   pos = ExpectRun(map, pos, kAstI64, 212);
-  delete[] data;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8