diff options
Diffstat (limited to 'gin/fingerprint')
| -rw-r--r-- | gin/fingerprint/fingerprint_v8_snapshot.gypi | 47 | ||||
| -rwxr-xr-x | gin/fingerprint/fingerprint_v8_snapshot.py | 86 |
2 files changed, 133 insertions, 0 deletions
diff --git a/gin/fingerprint/fingerprint_v8_snapshot.gypi b/gin/fingerprint/fingerprint_v8_snapshot.gypi new file mode 100644 index 0000000..ede0de3 --- /dev/null +++ b/gin/fingerprint/fingerprint_v8_snapshot.gypi @@ -0,0 +1,47 @@ +# Copyright 2015 The Chromium Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + +# This file is meant to be included into a target to provide a rule that +# fingerprints the v8 snapshot and generates a .cc file which includes this +# fingerprint. +# +# To use this, create a gyp target with the following form: +# { +# 'target_name': 'gin_v8_snapshot_fingerprint', +# 'type': 'none', +# 'variables': { +# 'snapshot_file': 'snapshot blob file to be fingerprinted', +# 'natives_file': 'natives blob file to be fingerprinted', +# 'output_file': 'output .cc file to generate with fingerprints', +# }, +# 'includes': [ '../gin/fingerprint/fingerprint_v8_snapshot.gypi' ], +# }, +# + +{ + 'conditions': [ + ['v8_use_external_startup_data==1', { + 'actions': [ + { + 'action_name': 'Generate V8 snapshot fingerprint', + 'message': 'Generating V8 snapshot fingerprint', + 'inputs': [ + '<(DEPTH)/gin/fingerprint/fingerprint_v8_snapshot.py', + '<(snapshot_file)', + '<(natives_file)', + ], + 'outputs': [ + '<(output_file)', + ], + 'action': [ + 'python', '<(DEPTH)/gin/fingerprint/fingerprint_v8_snapshot.py', + '--snapshot_file=<(snapshot_file)', + '--natives_file=<(natives_file)', + '--output_file=<(output_file)', + ], + } + ], + }], + ], +}
\ No newline at end of file diff --git a/gin/fingerprint/fingerprint_v8_snapshot.py b/gin/fingerprint/fingerprint_v8_snapshot.py new file mode 100755 index 0000000..d1f7092 --- /dev/null +++ b/gin/fingerprint/fingerprint_v8_snapshot.py @@ -0,0 +1,86 @@ +#!/usr/bin/env python +# +# Copyright 2015 The Chromium Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + +"""Fingerprints the V8 snapshot blob files. + +Constructs a SHA256 fingerprint of the V8 natives and snapshot blob files and +creates a .cc file which includes these fingerprint as variables. +""" + +import hashlib +import optparse +import os +import sys + +_HEADER = """// Copyright 2015 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// This file was generated by fingerprint_v8_snapshot.py. + +namespace gin { +""" + +_FOOTER = """ +} // namespace gin +""" + + +def FingerprintFile(file_path): + input_file = open(file_path, 'rb') + sha256 = hashlib.sha256() + while True: + block = input_file.read(sha256.block_size) + if not block: + break + sha256.update(block) + return sha256.digest() + + +def WriteFingerprint(output_file, variable_name, fingerprint): + output_file.write('\nextern const unsigned char %s[] = { ' % variable_name) + for byte in fingerprint: + output_file.write(str(ord(byte)) + ', ') + output_file.write('};\n') + + +def WriteOutputFile(natives_fingerprint, + snapshot_fingerprint, + output_file_path): + output_dir_path = os.path.dirname(output_file_path) + if not os.path.exists(output_dir_path): + os.makedirs(output_dir_path) + output_file = open(output_file_path, 'w') + + output_file.write(_HEADER) + WriteFingerprint(output_file, 'g_natives_fingerprint', natives_fingerprint) + output_file.write('\n') + WriteFingerprint(output_file, 'g_snapshot_fingerprint', snapshot_fingerprint) + output_file.write(_FOOTER) + + +def main(): + parser = optparse.OptionParser() + + parser.add_option('--snapshot_file', + help='The input V8 snapshot blob file path.') + parser.add_option('--natives_file', + help='The input V8 natives blob file path.') + parser.add_option('--output_file', + help='The path for the output cc file which will be write.') + + options, _ = parser.parse_args() + + natives_fingerprint = FingerprintFile(options.natives_file) + snapshot_fingerprint = FingerprintFile(options.snapshot_file) + WriteOutputFile( + natives_fingerprint, snapshot_fingerprint, options.output_file) + + return 0 + + +if __name__ == '__main__': + sys.exit(main()) |