Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/snapshot/mksnapshot.cc b/src/snapshot/mksnapshot.cc
new file mode 100644
index 0000000..c163cae
--- /dev/null
+++ b/src/snapshot/mksnapshot.cc
@@ -0,0 +1,176 @@
+// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+
+#include "include/libplatform/libplatform.h"
+#include "src/assembler.h"
+#include "src/base/platform/platform.h"
+#include "src/flags.h"
+#include "src/list.h"
+#include "src/snapshot/natives.h"
+#include "src/snapshot/serialize.h"
+
+
+using namespace v8;
+
+class SnapshotWriter {
+ public:
+ SnapshotWriter() : fp_(NULL), startup_blob_file_(NULL) {}
+
+ ~SnapshotWriter() {
+ if (fp_) fclose(fp_);
+ if (startup_blob_file_) fclose(startup_blob_file_);
+ }
+
+ void SetSnapshotFile(const char* snapshot_file) {
+ if (snapshot_file != NULL) fp_ = GetFileDescriptorOrDie(snapshot_file);
+ }
+
+ void SetStartupBlobFile(const char* startup_blob_file) {
+ if (startup_blob_file != NULL)
+ startup_blob_file_ = GetFileDescriptorOrDie(startup_blob_file);
+ }
+
+ void WriteSnapshot(v8::StartupData blob) const {
+ i::Vector<const i::byte> blob_vector(
+ reinterpret_cast<const i::byte*>(blob.data), blob.raw_size);
+ MaybeWriteSnapshotFile(blob_vector);
+ MaybeWriteStartupBlob(blob_vector);
+ }
+
+ private:
+ void MaybeWriteStartupBlob(const i::Vector<const i::byte>& blob) const {
+ if (!startup_blob_file_) return;
+
+ size_t written = fwrite(blob.begin(), 1, blob.length(), startup_blob_file_);
+ if (written != static_cast<size_t>(blob.length())) {
+ i::PrintF("Writing snapshot file failed.. Aborting.\n");
+ exit(1);
+ }
+ }
+
+ void MaybeWriteSnapshotFile(const i::Vector<const i::byte>& blob) const {
+ if (!fp_) return;
+
+ WriteFilePrefix();
+ WriteData(blob);
+ WriteFileSuffix();
+ }
+
+ void WriteFilePrefix() const {
+ fprintf(fp_, "// Autogenerated snapshot file. Do not edit.\n\n");
+ fprintf(fp_, "#include \"src/v8.h\"\n");
+ fprintf(fp_, "#include \"src/base/platform/platform.h\"\n\n");
+ fprintf(fp_, "#include \"src/snapshot/snapshot.h\"\n\n");
+ fprintf(fp_, "namespace v8 {\n");
+ fprintf(fp_, "namespace internal {\n\n");
+ }
+
+ void WriteFileSuffix() const {
+ fprintf(fp_, "const v8::StartupData* Snapshot::DefaultSnapshotBlob() {\n");
+ fprintf(fp_, " return &blob;\n");
+ fprintf(fp_, "}\n\n");
+ fprintf(fp_, "} // namespace internal\n");
+ fprintf(fp_, "} // namespace v8\n");
+ }
+
+ void WriteData(const i::Vector<const i::byte>& blob) const {
+ fprintf(fp_, "static const byte blob_data[] __attribute__((aligned(8))) = {\n");
+ WriteSnapshotData(blob);
+ fprintf(fp_, "};\n");
+ fprintf(fp_, "static const int blob_size = %d;\n", blob.length());
+ fprintf(fp_, "static const v8::StartupData blob =\n");
+ fprintf(fp_, "{ (const char*) blob_data, blob_size };\n");
+ }
+
+ void WriteSnapshotData(const i::Vector<const i::byte>& blob) const {
+ for (int i = 0; i < blob.length(); i++) {
+ if ((i & 0x1f) == 0x1f) fprintf(fp_, "\n");
+ if (i > 0) fprintf(fp_, ",");
+ fprintf(fp_, "%u", static_cast<unsigned char>(blob.at(i)));
+ }
+ fprintf(fp_, "\n");
+ }
+
+ FILE* GetFileDescriptorOrDie(const char* filename) {
+ FILE* fp = base::OS::FOpen(filename, "wb");
+ if (fp == NULL) {
+ i::PrintF("Unable to open file \"%s\" for writing.\n", filename);
+ exit(1);
+ }
+ return fp;
+ }
+
+ FILE* fp_;
+ FILE* startup_blob_file_;
+};
+
+
+char* GetExtraCode(char* filename) {
+ if (filename == NULL || strlen(filename) == 0) return NULL;
+ ::printf("Embedding extra script: %s\n", filename);
+ FILE* file = base::OS::FOpen(filename, "rb");
+ if (file == NULL) {
+ fprintf(stderr, "Failed to open '%s': errno %d\n", filename, errno);
+ exit(1);
+ }
+ fseek(file, 0, SEEK_END);
+ size_t size = ftell(file);
+ rewind(file);
+ char* chars = new char[size + 1];
+ chars[size] = '\0';
+ for (size_t i = 0; i < size;) {
+ size_t read = fread(&chars[i], 1, size - i, file);
+ if (ferror(file)) {
+ fprintf(stderr, "Failed to read '%s': errno %d\n", filename, errno);
+ exit(1);
+ }
+ i += read;
+ }
+ fclose(file);
+ return chars;
+}
+
+
+int main(int argc, char** argv) {
+ // By default, log code create information in the snapshot.
+ i::FLAG_log_code = true;
+ i::FLAG_logfile_per_isolate = false;
+
+ // Print the usage if an error occurs when parsing the command line
+ // flags or if the help flag is set.
+ int result = i::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
+ if (result > 0 || (argc != 1 && argc != 2) || i::FLAG_help) {
+ ::printf("Usage: %s --startup_src=... --startup_blob=... [extras]\n",
+ argv[0]);
+ i::FlagList::PrintHelp();
+ return !i::FLAG_help;
+ }
+
+ i::CpuFeatures::Probe(true);
+ V8::InitializeICU();
+ v8::Platform* platform = v8::platform::CreateDefaultPlatform();
+ v8::V8::InitializePlatform(platform);
+ v8::V8::Initialize();
+
+ {
+ SnapshotWriter writer;
+ if (i::FLAG_startup_src) writer.SetSnapshotFile(i::FLAG_startup_src);
+ if (i::FLAG_startup_blob) writer.SetStartupBlobFile(i::FLAG_startup_blob);
+ char* extra_code = GetExtraCode(argc == 2 ? argv[1] : NULL);
+ StartupData blob = v8::V8::CreateSnapshotDataBlob(extra_code);
+ CHECK(blob.data);
+ writer.WriteSnapshot(blob);
+ delete[] extra_code;
+ delete[] blob.data;
+ }
+
+ V8::Dispose();
+ V8::ShutdownPlatform();
+ delete platform;
+ return 0;
+}