mirror of
https://github.com/denoland/deno.git
synced 2024-12-23 07:44:48 -05:00
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
// 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();
|
|
}
|