libdeno: Expose snapshot creation.

1 files changed, 29 insertions, 0 deletions

diff --git a/libdeno/api.cc b/libdeno/api.cc
index e01f95e82..512252737 100644
--- a/libdeno/api.cc
+++ b/libdeno/api.cc
@@ -42,10 +42,39 @@ Deno* deno_new(deno_buf snapshot, deno_recv_cb cb) {
   return reinterpret_cast<Deno*>(d);
 }
 
+Deno* deno_new_snapshotter(deno_recv_cb cb, const char* js_filename,
+                           const char* js_source, const char* source_map) {
+  auto* creator = new v8::SnapshotCreator(deno::external_references);
+  auto* isolate = creator->GetIsolate();
+  auto* d = new deno::DenoIsolate(deno::empty_buf, cb);
+  d->snapshot_creator_ = creator;
+  d->AddIsolate(isolate);
+  v8::Isolate::Scope isolate_scope(isolate);
+  {
+    v8::HandleScope handle_scope(isolate);
+    auto context = v8::Context::New(isolate);
+    creator->SetDefaultContext(context,
+                               v8::SerializeInternalFieldsCallback(
+                                   deno::SerializeInternalFields, nullptr));
+    deno::InitializeContext(isolate, context, js_filename, js_source,
+                            source_map);
+  }
+  return reinterpret_cast<Deno*>(d);
+}
+
 deno::DenoIsolate* unwrap(Deno* d_) {
   return reinterpret_cast<deno::DenoIsolate*>(d_);
 }
 
+deno_buf deno_get_snapshot(Deno* d_) {
+  auto* d = unwrap(d_);
+  CHECK_NE(d->snapshot_creator_, nullptr);
+  auto blob = d->snapshot_creator_->CreateBlob(
+      v8::SnapshotCreator::FunctionCodeHandling::kClear);
+  return {nullptr, 0, reinterpret_cast<uint8_t*>(const_cast<char*>(blob.data)),
+          blob.raw_size};
+}
+
 void deno_init() {
   // v8::V8::InitializeICUDefaultLocation(argv[0]);
   // v8::V8::InitializeExternalStartupData(argv[0]);