Expose a lower bound of malloc'd memory via heap statistics

src/wasm/module-decoder.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 "src/wasm/module-decoder.h"
 
 #include "src/base/functional.h"
 #include "src/base/platform/platform.h"
 #include "src/macro-assembler.h"
 #include "src/objects.h"
@@ skipping 557 matching lines @@
                           WasmFunction* function) {
     if (FLAG_trace_wasm_decode_time) {
       OFStream os(stdout);
       os << "Verifying WASM function " << WasmFunctionName(function, menv)
          << std::endl;
       os << std::endl;
     }
     FunctionBody body = {menv, function->sig, start_,
                          start_ + function->code_start_offset,
                          start_ + function->code_end_offset};
-    TreeResult result = VerifyWasmCode(body);
+    TreeResult result = VerifyWasmCode(module_zone->allocator(), body);
     if (result.failed()) {
       // Wrap the error message from the function decoder.
       std::ostringstream str;
       str << "in function " << WasmFunctionName(function, menv) << ": ";
       str << result;
       std::string strval = str.str();
       const char* raw = strval.c_str();
       size_t len = strlen(raw);
       char* buffer = new char[len];
       strncpy(buffer, raw, len);
@@ skipping 202 matching lines @@
   if (function_start > function_end) return FunctionError("start > end");
   if (size > kMaxFunctionSize)
     return FunctionError("size > maximum function size");
   WasmFunction* function = new WasmFunction();
   ModuleDecoder decoder(zone, function_start, function_end, kWasmOrigin);
   return decoder.DecodeSingleFunction(module_env, function);
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8