| // 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/partial-serializer.h" |
| #include "src/snapshot/startup-serializer.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, const char* description) { |
| if (filename == NULL || strlen(filename) == 0) return NULL; |
| ::printf("Loading script for %s: %s\n", description, 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) { |
| // Make mksnapshot runs predictable to create reproducible snapshots. |
| i::FLAG_predictable = true; |
| |
| // 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 > 3) || 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* embed_script = GetExtraCode(argc >= 2 ? argv[1] : NULL, "embedding"); |
| StartupData blob = v8::V8::CreateSnapshotDataBlob(embed_script); |
| delete[] embed_script; |
| |
| char* warmup_script = GetExtraCode(argc >= 3 ? argv[2] : NULL, "warm up"); |
| if (warmup_script) { |
| StartupData cold = blob; |
| blob = v8::V8::WarmUpSnapshotDataBlob(cold, warmup_script); |
| delete[] cold.data; |
| delete[] warmup_script; |
| } |
| |
| CHECK(blob.data); |
| writer.WriteSnapshot(blob); |
| delete[] blob.data; |
| } |
| |
| V8::Dispose(); |
| V8::ShutdownPlatform(); |
| delete platform; |
| return 0; |
| } |