Introduce code serializer/deserializer.

test/cctest/test-compiler.cc

Index: test/cctest/test-compiler.cc
diff --git a/test/cctest/test-compiler.cc b/test/cctest/test-compiler.cc
index 5384dcc13139d1fe5721d637cfe69aa45a071a92..9b716f5173192e324f776aacc13fae243b68a95c 100644
--- a/test/cctest/test-compiler.cc
+++ b/test/cctest/test-compiler.cc
@@ -32,6 +32,7 @@
 
 #include "src/compiler.h"
 #include "src/disasm.h"
+#include "src/parser.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;
@@ -398,6 +399,42 @@ TEST(OptimizedCodeSharing) {
 }
 
 
+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) {