First step towards splitting a full snapshot into a vm isolate snapshot and a

runtime/tools/create_snapshot_bin.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """Script to create snapshot bin file."""
 
 import getopt
 import optparse
 import os
 from os.path import basename, join
 import sys
 import utils
 
 
 HOST_OS = utils.GuessOS()
 HOST_CPUS = utils.GuessCpus()
 DEBUG = False
 VERBOSE = False
 
 def BuildOptions():
   result = optparse.OptionParser()
   result.add_option("--executable",
       action="store", type="string",
       help="path to snapshot generator executable")
+  result.add_option("--vm_output_bin",
+      action="store", type="string",
+      help="output file name into which vm isolate snapshot in binary form " +
+           "is generated")
   result.add_option("--output_bin",
       action="store", type="string",
-      help="output file name into which snapshot in binary form is generated")
+      help="output file name into which isolate snapshot in binary form " +
+           "is generated")
   result.add_option("--script",
       action="store", type="string",
       help="Dart script for which snapshot is to be generated")
   result.add_option("--package_root",
       action="store", type="string",
       help="path used to resolve package: imports.")
   result.add_option("--url_mapping",
       default=[],
       action="append",
       help=("mapping from url to file name, used when generating snapshots " +
             "E.g.: --url_mapping=fileUri,/path/to/file.dart"))
   result.add_option("-v", "--verbose",
       help='Verbose output.',
       default=False, action="store_true")
   result.add_option("--target_os",
       action="store", type="string",
       help="Which os to run the executable on. Current choice is android")
   result.add_option("--abi",
       action="store", type="string",
       help="Desired ABI for android target OS. armeabi-v7a or x86")
   return result
 
 
 def ProcessOptions(options):
   if not options.executable:
     sys.stderr.write('--executable not specified\n')
     return False
+  if not options.vm_output_bin:
+    sys.stderr.write('--vm_output_bin not specified\n')
+    return False
   if not options.output_bin:
     sys.stderr.write('--output_bin not specified\n')
     return False
   if options.abi and not options.target_os == 'android':
     sys.stderr.write('--abi requires --target_os android\n')
     return False
   return True
 
 
 def Main():
   # Parse options.
   parser = BuildOptions()
   (options, args) = parser.parse_args()
   if not ProcessOptions(options):
     parser.print_help()
     return 1
 
   # If there are additional arguments, report error and exit.
   if args:
     parser.print_help()
     return 1
 
   # Setup arguments to the snapshot generator binary.
   script_args = ["--error_on_bad_type", "--error_on_bad_override"]
 
   # Pass along the package_root if there is one.
   if options.package_root:
     script_args.append(''.join([ "--package_root=", options.package_root]))
 
-  # First setup the snapshot output filename.
-  script_args.append(''.join([ "--snapshot=", options.output_bin ]))
+  # First setup the vm isolate and regular isolate snapshot output filename.
+  script_args.append(''.join([ "--vm_isolate_snapshot=",
+                               options.vm_output_bin ]))
+  script_args.append(''.join([ "--isolate_snapshot=", options.output_bin ]))
 
   # Next setup all url mapping options specified.
   for url_arg in options.url_mapping:
     url_mapping_argument = ''.join(["--url_mapping=", url_arg ])
     script_args.append(url_mapping_argument)
 
   # Finally append the script name if one is specified.
   if options.script:
     script_args.append(options.script)
 
   # Construct command line to execute the snapshot generator binary and invoke.
   command = [ options.executable ] + script_args
   try:
     utils.RunCommand(command, outStream=sys.stderr, errStream=sys.stderr,
                      verbose=options.verbose, printErrorInfo=True)
   except Exception as e:
     return -1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())