Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include <errno.h> |
| 6 | #include <signal.h> |
| 7 | #include <stdio.h> |
| 8 | |
| 9 | #include "include/libplatform/libplatform.h" |
| 10 | #include "src/assembler.h" |
| 11 | #include "src/base/platform/platform.h" |
| 12 | #include "src/flags.h" |
| 13 | #include "src/list.h" |
| 14 | #include "src/snapshot/natives.h" |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 15 | #include "src/snapshot/partial-serializer.h" |
| 16 | #include "src/snapshot/startup-serializer.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 17 | |
| 18 | using namespace v8; |
| 19 | |
| 20 | class SnapshotWriter { |
| 21 | public: |
| 22 | SnapshotWriter() : fp_(NULL), startup_blob_file_(NULL) {} |
| 23 | |
| 24 | ~SnapshotWriter() { |
| 25 | if (fp_) fclose(fp_); |
| 26 | if (startup_blob_file_) fclose(startup_blob_file_); |
| 27 | } |
| 28 | |
| 29 | void SetSnapshotFile(const char* snapshot_file) { |
| 30 | if (snapshot_file != NULL) fp_ = GetFileDescriptorOrDie(snapshot_file); |
| 31 | } |
| 32 | |
| 33 | void SetStartupBlobFile(const char* startup_blob_file) { |
| 34 | if (startup_blob_file != NULL) |
| 35 | startup_blob_file_ = GetFileDescriptorOrDie(startup_blob_file); |
| 36 | } |
| 37 | |
| 38 | void WriteSnapshot(v8::StartupData blob) const { |
| 39 | i::Vector<const i::byte> blob_vector( |
| 40 | reinterpret_cast<const i::byte*>(blob.data), blob.raw_size); |
| 41 | MaybeWriteSnapshotFile(blob_vector); |
| 42 | MaybeWriteStartupBlob(blob_vector); |
| 43 | } |
| 44 | |
| 45 | private: |
| 46 | void MaybeWriteStartupBlob(const i::Vector<const i::byte>& blob) const { |
| 47 | if (!startup_blob_file_) return; |
| 48 | |
| 49 | size_t written = fwrite(blob.begin(), 1, blob.length(), startup_blob_file_); |
| 50 | if (written != static_cast<size_t>(blob.length())) { |
| 51 | i::PrintF("Writing snapshot file failed.. Aborting.\n"); |
| 52 | exit(1); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | void MaybeWriteSnapshotFile(const i::Vector<const i::byte>& blob) const { |
| 57 | if (!fp_) return; |
| 58 | |
| 59 | WriteFilePrefix(); |
| 60 | WriteData(blob); |
| 61 | WriteFileSuffix(); |
| 62 | } |
| 63 | |
| 64 | void WriteFilePrefix() const { |
| 65 | fprintf(fp_, "// Autogenerated snapshot file. Do not edit.\n\n"); |
| 66 | fprintf(fp_, "#include \"src/v8.h\"\n"); |
| 67 | fprintf(fp_, "#include \"src/base/platform/platform.h\"\n\n"); |
| 68 | fprintf(fp_, "#include \"src/snapshot/snapshot.h\"\n\n"); |
| 69 | fprintf(fp_, "namespace v8 {\n"); |
| 70 | fprintf(fp_, "namespace internal {\n\n"); |
| 71 | } |
| 72 | |
| 73 | void WriteFileSuffix() const { |
| 74 | fprintf(fp_, "const v8::StartupData* Snapshot::DefaultSnapshotBlob() {\n"); |
| 75 | fprintf(fp_, " return &blob;\n"); |
| 76 | fprintf(fp_, "}\n\n"); |
| 77 | fprintf(fp_, "} // namespace internal\n"); |
| 78 | fprintf(fp_, "} // namespace v8\n"); |
| 79 | } |
| 80 | |
| 81 | void WriteData(const i::Vector<const i::byte>& blob) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame^] | 82 | fprintf(fp_, "static const byte blob_data[] = {\n"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 83 | WriteSnapshotData(blob); |
| 84 | fprintf(fp_, "};\n"); |
| 85 | fprintf(fp_, "static const int blob_size = %d;\n", blob.length()); |
| 86 | fprintf(fp_, "static const v8::StartupData blob =\n"); |
| 87 | fprintf(fp_, "{ (const char*) blob_data, blob_size };\n"); |
| 88 | } |
| 89 | |
| 90 | void WriteSnapshotData(const i::Vector<const i::byte>& blob) const { |
| 91 | for (int i = 0; i < blob.length(); i++) { |
| 92 | if ((i & 0x1f) == 0x1f) fprintf(fp_, "\n"); |
| 93 | if (i > 0) fprintf(fp_, ","); |
| 94 | fprintf(fp_, "%u", static_cast<unsigned char>(blob.at(i))); |
| 95 | } |
| 96 | fprintf(fp_, "\n"); |
| 97 | } |
| 98 | |
| 99 | FILE* GetFileDescriptorOrDie(const char* filename) { |
| 100 | FILE* fp = base::OS::FOpen(filename, "wb"); |
| 101 | if (fp == NULL) { |
| 102 | i::PrintF("Unable to open file \"%s\" for writing.\n", filename); |
| 103 | exit(1); |
| 104 | } |
| 105 | return fp; |
| 106 | } |
| 107 | |
| 108 | FILE* fp_; |
| 109 | FILE* startup_blob_file_; |
| 110 | }; |
| 111 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 112 | char* GetExtraCode(char* filename, const char* description) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 113 | if (filename == NULL || strlen(filename) == 0) return NULL; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 114 | ::printf("Loading script for %s: %s\n", description, filename); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 115 | FILE* file = base::OS::FOpen(filename, "rb"); |
| 116 | if (file == NULL) { |
| 117 | fprintf(stderr, "Failed to open '%s': errno %d\n", filename, errno); |
| 118 | exit(1); |
| 119 | } |
| 120 | fseek(file, 0, SEEK_END); |
| 121 | size_t size = ftell(file); |
| 122 | rewind(file); |
| 123 | char* chars = new char[size + 1]; |
| 124 | chars[size] = '\0'; |
| 125 | for (size_t i = 0; i < size;) { |
| 126 | size_t read = fread(&chars[i], 1, size - i, file); |
| 127 | if (ferror(file)) { |
| 128 | fprintf(stderr, "Failed to read '%s': errno %d\n", filename, errno); |
| 129 | exit(1); |
| 130 | } |
| 131 | i += read; |
| 132 | } |
| 133 | fclose(file); |
| 134 | return chars; |
| 135 | } |
| 136 | |
| 137 | |
| 138 | int main(int argc, char** argv) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 139 | // Make mksnapshot runs predictable to create reproducible snapshots. |
| 140 | i::FLAG_predictable = true; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 141 | |
| 142 | // Print the usage if an error occurs when parsing the command line |
| 143 | // flags or if the help flag is set. |
| 144 | int result = i::FlagList::SetFlagsFromCommandLine(&argc, argv, true); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 145 | if (result > 0 || (argc > 3) || i::FLAG_help) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 146 | ::printf("Usage: %s --startup_src=... --startup_blob=... [extras]\n", |
| 147 | argv[0]); |
| 148 | i::FlagList::PrintHelp(); |
| 149 | return !i::FLAG_help; |
| 150 | } |
| 151 | |
| 152 | i::CpuFeatures::Probe(true); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame^] | 153 | V8::InitializeICUDefaultLocation(argv[0]); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 154 | v8::Platform* platform = v8::platform::CreateDefaultPlatform(); |
| 155 | v8::V8::InitializePlatform(platform); |
| 156 | v8::V8::Initialize(); |
| 157 | |
| 158 | { |
| 159 | SnapshotWriter writer; |
| 160 | if (i::FLAG_startup_src) writer.SetSnapshotFile(i::FLAG_startup_src); |
| 161 | if (i::FLAG_startup_blob) writer.SetStartupBlobFile(i::FLAG_startup_blob); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 162 | |
| 163 | char* embed_script = GetExtraCode(argc >= 2 ? argv[1] : NULL, "embedding"); |
| 164 | StartupData blob = v8::V8::CreateSnapshotDataBlob(embed_script); |
| 165 | delete[] embed_script; |
| 166 | |
| 167 | char* warmup_script = GetExtraCode(argc >= 3 ? argv[2] : NULL, "warm up"); |
| 168 | if (warmup_script) { |
| 169 | StartupData cold = blob; |
| 170 | blob = v8::V8::WarmUpSnapshotDataBlob(cold, warmup_script); |
| 171 | delete[] cold.data; |
| 172 | delete[] warmup_script; |
| 173 | } |
| 174 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 175 | CHECK(blob.data); |
| 176 | writer.WriteSnapshot(blob); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 177 | delete[] blob.data; |
| 178 | } |
| 179 | |
| 180 | V8::Dispose(); |
| 181 | V8::ShutdownPlatform(); |
| 182 | delete platform; |
| 183 | return 0; |
| 184 | } |