chore: move libdeno files to //libdeno/

1 files changed, 75 insertions, 0 deletions

diff --git a/libdeno/snapshot_creator.cc b/libdeno/snapshot_creator.cc
new file mode 100644
index 000000000..8038c9b13
--- /dev/null
+++ b/libdeno/snapshot_creator.cc
@@ -0,0 +1,75 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+// Hint: --trace_serializer is a useful debugging flag.
+#include <fstream>
+#include "deno.h"
+#include "file_util.h"
+#include "internal.h"
+#include "third_party/v8/include/v8.h"
+#include "third_party/v8/src/base/logging.h"
+
+namespace deno {
+
+v8::StartupData SerializeInternalFields(v8::Local<v8::Object> holder, int index,
+                                        void* data) {
+  DCHECK_EQ(data, nullptr);
+  InternalFieldData* embedder_field = static_cast<InternalFieldData*>(
+      holder->GetAlignedPointerFromInternalField(index));
+  if (embedder_field == nullptr) return {nullptr, 0};
+  int size = sizeof(*embedder_field);
+  char* payload = new char[size];
+  // We simply use memcpy to serialize the content.
+  memcpy(payload, embedder_field, size);
+  return {payload, size};
+}
+
+v8::StartupData MakeSnapshot(const char* js_filename,
+                             const std::string& js_source,
+                             const std::string* source_map) {
+  auto* creator = new v8::SnapshotCreator(external_references);
+  auto* isolate = creator->GetIsolate();
+  v8::Isolate::Scope isolate_scope(isolate);
+  {
+    v8::HandleScope handle_scope(isolate);
+    auto context = v8::Context::New(isolate);
+    InitializeContext(isolate, context, js_filename, js_source, source_map);
+    creator->SetDefaultContext(context, v8::SerializeInternalFieldsCallback(
+                                            SerializeInternalFields, nullptr));
+  }
+
+  auto snapshot_blob =
+      creator->CreateBlob(v8::SnapshotCreator::FunctionCodeHandling::kClear);
+
+  return snapshot_blob;
+}
+
+}  // namespace deno
+
+int main(int argc, char** argv) {
+  const char* snapshot_out_bin = argv[1];
+  const char* js_fn = argv[2];
+  const char* source_map_fn = argv[3];  // Optional.
+
+  v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
+
+  CHECK_NE(js_fn, nullptr);
+  CHECK_NE(snapshot_out_bin, nullptr);
+
+  std::string js_source;
+  CHECK(deno::ReadFileToString(js_fn, &js_source));
+
+  std::string source_map;
+  if (source_map_fn != nullptr) {
+    CHECK_EQ(argc, 4);
+    CHECK(deno::ReadFileToString(source_map_fn, &source_map));
+  }
+
+  deno_init();
+  auto snapshot_blob = deno::MakeSnapshot(
+      js_fn, js_source, source_map_fn != nullptr ? &source_map : nullptr);
+  std::string snapshot_str(snapshot_blob.data, snapshot_blob.raw_size);
+
+  std::ofstream file_(snapshot_out_bin, std::ios::binary);
+  file_ << snapshot_str;
+  file_.close();
+  return file_.bad();
+}