Introduce code serializer/deserializer.

test/cctest/test-compiler.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <stdlib.h>
 #include <wchar.h>
 
 #include "src/v8.h"
 
 #include "src/compiler.h"
 #include "src/disasm.h"
+#include "src/parser.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
 
 static Handle<Object> GetGlobalProperty(const char* name) {
   Isolate* isolate = CcTest::i_isolate();
   return Object::GetProperty(
       isolate, isolate->global_object(), name).ToHandleChecked();
 }
 
@@ skipping 346 matching lines @@
         *v8::Local<v8::Function>::Cast(env->Global()->Get(v8_str("closure2"))));
     CHECK(fun1->IsOptimized()
           || !CcTest::i_isolate()->use_crankshaft() || !fun1->IsOptimizable());
     CHECK(fun2->IsOptimized()
           || !CcTest::i_isolate()->use_crankshaft() || !fun2->IsOptimizable());
     CHECK_EQ(fun1->code(), fun2->code());
   }
 }
 
 
+TEST(SerializeToplevel) {
+  FLAG_serialize_toplevel = true;
+  v8::HandleScope scope(CcTest::isolate());
+  v8::Local<v8::Context> context = CcTest::NewContext(PRINT_EXTENSION);
+  v8::Context::Scope context_scope(context);
+
+  const char* source = "1 + 1";

[vogelheim, 2014/07/07 15:20:01]

It might be useful - maybe as a separate test - to modify source from "1 + 1" to
"1 + 2" (or somesuch) between the two compiles, to verify that the second
compile indeed reads from the cache. Right now, all sorts of Cache
implementations - e.g. the current parser cache, or a NOP implementation - would
pass the SerializeTopLevel test, despite not serializing the top-level compile
at all.

[Yang, 2014/07/08 09:01:05]

Done.

+
+  Isolate* isolate = CcTest::i_isolate();
+  Handle<String> source_code = isolate->factory()
+                                   ->NewStringFromUtf8(CStrVector(source))
+                                   .ToHandleChecked();
+
+  ScriptData* cache = NULL;
+
+  Handle<SharedFunctionInfo> orig =
+      Compiler::CompileScript(source_code, Handle<String>(), 0, 0, false,
+                              Handle<Context>(isolate->native_context()), NULL,
+                              &cache, PRODUCE_CACHED_DATA, NOT_NATIVES_CODE);
+
+  Handle<SharedFunctionInfo> info =
+      Compiler::CompileScript(source_code, Handle<String>(), 0, 0, false,
+                              Handle<Context>(isolate->native_context()), NULL,
+                              &cache, CONSUME_CACHED_DATA, NOT_NATIVES_CODE);
+
+  CHECK_NE(*orig, *info);
+  Handle<JSFunction> fun =
+      isolate->factory()->NewFunctionFromSharedFunctionInfo(
+          info, isolate->native_context());
+  Handle<JSObject> global(isolate->context()->global_object());
+  Handle<Object> result =
+      Execution::Call(isolate, fun, global, 0, NULL).ToHandleChecked();
+  CHECK_EQ(2, Handle<Smi>::cast(result)->value());
+}
+
+
 #ifdef ENABLE_DISASSEMBLER
 static Handle<JSFunction> GetJSFunction(v8::Handle<v8::Object> obj,
                                  const char* property_name) {
   v8::Local<v8::Function> fun =
       v8::Local<v8::Function>::Cast(obj->Get(v8_str(property_name)));
   return v8::Utils::OpenHandle(*fun);
 }
 
 
 static void CheckCodeForUnsafeLiteral(Handle<JSFunction> f) {
@@ skipping 32 matching lines @@
   CompileRun("function f() { a = 12345678 }; f();");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { a = 12345678 + x}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x += 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x = 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
 }
 #endif