[wasm][asm.js] Add wasm module size to asm debug measurements.

src/asmjs/asm-js.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/asmjs/asm-js.h"
 
 #include "src/api-natives.h"
 #include "src/api.h"
 #include "src/asmjs/asm-typer.h"
 #include "src/asmjs/asm-wasm-builder.h"
@@ skipping 173 matching lines @@
   Vector<const byte> asm_offsets_vec(asm_offsets->begin(),
                                      static_cast<int>(asm_offsets->size()));
 
   base::ElapsedTimer compile_timer;
   compile_timer.Start();
   MaybeHandle<JSObject> compiled = wasm::CreateModuleObjectFromBytes(
       info->isolate(), module->begin(), module->end(), &thrower,
       internal::wasm::kAsmJsOrigin, info->script(), asm_offsets_vec);
   DCHECK(!compiled.is_null());
   double compile_time = compile_timer.Elapsed().InMillisecondsF();
+  DCHECK_GE(module->end(), module->begin());
+  uintptr_t wasm_size = module->end() - module->begin();
 
   wasm::AsmTyper::StdlibSet uses = builder.typer()->StdlibUses();
   Handle<FixedArray> uses_array =
       info->isolate()->factory()->NewFixedArray(static_cast<int>(uses.size()));
   int count = 0;
   for (auto i : uses) {
     uses_array->set(count++, Smi::FromInt(i));
   }
 
   Handle<FixedArray> result =
       info->isolate()->factory()->NewFixedArray(kWasmDataEntryCount);
   result->set(kWasmDataCompiledModule, *compiled.ToHandleChecked());
   result->set(kWasmDataForeignGlobals, *foreign_globals);
   result->set(kWasmDataUsesArray, *uses_array);
   result->set(kWasmDataScript, *info->script());
   result->set(kWasmDataScriptPosition,
               Smi::FromInt(info->literal()->position()));
 
   MessageLocation location(info->script(), info->literal()->position(),
                            info->literal()->position());
   char text[100];
   int length;
   if (FLAG_predictable) {
     length = base::OS::SNPrintF(text, arraysize(text), "success");
   } else {
-    length =
-        base::OS::SNPrintF(text, arraysize(text),
-                           "success, asm->wasm: %0.3f ms, compile: %0.3f ms",
-                           asm_wasm_time, compile_time);
+    length = base::OS::SNPrintF(
+        text, arraysize(text),
+        "success, asm->wasm: %0.3f ms, compile: %0.3f ms, %" PRIuPTR " bytes",
+        asm_wasm_time, compile_time, wasm_size);
   }
   DCHECK_NE(-1, length);
   USE(length);
   Handle<String> stext(info->isolate()->factory()->InternalizeUtf8String(text));
   Handle<JSMessageObject> message = MessageHandler::MakeMessageObject(
       info->isolate(), MessageTemplate::kAsmJsCompiled, &location, stext,
       Handle<JSArray>::null());
   message->set_error_level(v8::Isolate::kMessageInfo);
   if (!FLAG_suppress_asm_messages && FLAG_trace_asm_time) {
     MessageHandler::ReportMessage(info->isolate(), &location, message);
@@ skipping 110 matching lines @@
   message->set_error_level(v8::Isolate::kMessageInfo);
   if (!FLAG_suppress_asm_messages && FLAG_trace_asm_time) {
     MessageHandler::ReportMessage(isolate, &location, message);
   }
 
   return module_object;
 }
 
 }  // namespace internal
 }  // namespace v8