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https://github.com/denoland/deno.git
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86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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#include "third_party/v8/include/v8.h"
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#include "third_party/v8/src/base/logging.h"
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#include "deno.h"
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#include "internal.h"
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extern const char deno_snapshot_start asm("deno_snapshot_start");
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extern const char deno_snapshot_end asm("deno_snapshot_end");
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#ifdef LIBDENO_TEST
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asm(".data\n"
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"deno_snapshot_start: .incbin \"gen/snapshot_libdeno_test.bin\"\n"
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"deno_snapshot_end:\n"
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".globl deno_snapshot_start;\n"
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".globl deno_snapshot_end;");
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#else
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asm(".data\n"
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"deno_snapshot_start: .incbin \"gen/snapshot_deno.bin\"\n"
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"deno_snapshot_end:\n"
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".globl deno_snapshot_start;\n"
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".globl deno_snapshot_end;");
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#endif // LIBDENO_TEST
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namespace deno {
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std::vector<InternalFieldData*> deserialized_data;
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void DeserializeInternalFields(v8::Local<v8::Object> holder, int index,
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v8::StartupData payload, void* data) {
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DCHECK_EQ(data, nullptr);
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if (payload.raw_size == 0) {
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holder->SetAlignedPointerInInternalField(index, nullptr);
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return;
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}
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InternalFieldData* embedder_field = new InternalFieldData{0};
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memcpy(embedder_field, payload.data, payload.raw_size);
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holder->SetAlignedPointerInInternalField(index, embedder_field);
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deserialized_data.push_back(embedder_field);
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}
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Deno* NewFromSnapshot(void* data, deno_recv_cb cb) {
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Deno* d = new Deno;
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d->currentArgs = nullptr;
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d->cb = cb;
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d->data = data;
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v8::Isolate::CreateParams params;
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params.array_buffer_allocator =
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v8::ArrayBuffer::Allocator::NewDefaultAllocator();
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params.external_references = external_references;
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CHECK_NE(&deno_snapshot_start, nullptr);
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int snapshot_len =
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static_cast<int>(&deno_snapshot_end - &deno_snapshot_start);
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static v8::StartupData snapshot = {&deno_snapshot_start, snapshot_len};
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params.snapshot_blob = &snapshot;
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v8::Isolate* isolate = v8::Isolate::New(params);
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AddIsolate(d, isolate);
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v8::Locker locker(isolate);
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v8::Isolate::Scope isolate_scope(isolate);
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{
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v8::HandleScope handle_scope(isolate);
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auto context =
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v8::Context::New(isolate, nullptr, v8::MaybeLocal<v8::ObjectTemplate>(),
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v8::MaybeLocal<v8::Value>(),
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v8::DeserializeInternalFieldsCallback(
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DeserializeInternalFields, nullptr));
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d->context.Reset(d->isolate, context);
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}
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return d;
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}
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} // namespace deno
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extern "C" {
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Deno* deno_new(void* data, deno_recv_cb cb) {
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return deno::NewFromSnapshot(data, cb);
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}
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}
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