kc3-lang/angle/android/compress_symbols.py

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• Hash : 73e17bf7
  Author :
  Date : 2019-05-14T10:42:25
  

  Android: Fix symbol compression logic
  
  Update the logic to compress ANGLE's symbols for Android to correctly
  include the necessary symbols.
  
  Bug: angleproject:3448
  Test: Build and install APK, verify symbols are present during crash
  Change-Id: Ibb995aa775d47fb9921e4ab11b956c63ac474c30
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1611750
  Commit-Queue: Tim Van Patten <timvp@google.com>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
  

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• android/compress_symbols.py

• #!/usr/bin/env python
  #  Copyright 2018 The ANGLE 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.
  
  # Generate library file with compressed symbols per Android build
  # process.
  # https://www.ece.villanova.edu/VECR/doc/gdb/MiniDebugInfo.html
  
  import argparse
  import subprocess
  import sys
  
  
  def main():
      parser = argparse.ArgumentParser(description=__doc__)
      parser.add_argument(
          '--objcopy', required=True, help='The objcopy binary to run', metavar='PATH')
      parser.add_argument('--nm', required=True, help='The nm binary to run', metavar='PATH')
      parser.add_argument('--strip', required=True, help='The strip binary to run', metavar='PATH')
      parser.add_argument(
          '--output', required=True, help='Final output shared object file', metavar='FILE')
      parser.add_argument(
          '--unstrippedsofile',
          required=True,
          help='Unstripped shared object file produced by linking command',
          metavar='FILE')
      args = parser.parse_args()
  
      copy_cmd = ["cp", args.unstrippedsofile, args.output]
      result = subprocess.call(copy_cmd)
  
      nm_cmd = subprocess.Popen([args.nm, '-D', args.output, '--format=posix', '--defined-only'],
                                stdout=subprocess.PIPE)
  
      awk_cmd = subprocess.Popen(['awk', '{ print $1}'], stdin=nm_cmd.stdout, stdout=subprocess.PIPE)
  
      dynsym_out = open(args.output + '.dynsyms', 'w')
      sort_cmd = subprocess.Popen(['sort'], stdin=awk_cmd.stdout, stdout=dynsym_out)
      sort_cmd.wait()
      dynsym_out.close()
  
      funcsyms_out = open(args.output + '.funcsyms', 'w')
      nm_cmd = subprocess.Popen([args.nm, args.output, '--format=posix', '--defined-only'],
                                stdout=subprocess.PIPE)
  
      awk_cmd = subprocess.Popen(['awk', '{ if ($2 == "T" || $2 == "t" || $2 == "D") print $1 }'],
                                 stdin=nm_cmd.stdout,
                                 stdout=subprocess.PIPE)
  
      sort_cmd = subprocess.Popen(['sort'], stdin=awk_cmd.stdout, stdout=funcsyms_out)
      sort_cmd.wait()
      funcsyms_out.close()
  
      keep_symbols = open(args.output + '.keep_symbols', 'w')
      comm_cmd = subprocess.Popen(
          ['comm', '-13', args.output + '.dynsyms', args.output + '.funcsyms'], stdout=keep_symbols)
      comm_cmd.wait()
  
      # Ensure that the keep_symbols file is not empty.
      keep_symbols.write("\n")
      keep_symbols.close()
  
      objcopy_cmd = [args.objcopy, '--only-keep-debug', args.output, args.output + '.debug']
      subprocess.check_call(objcopy_cmd)
  
      objcopy_cmd = [
          args.objcopy, '-S', '--remove-section', '.gdb_index', '--remove-section', '.comment',
          '--keep-symbols', args.output + '.keep_symbols', args.output + '.debug',
          args.output + '.mini_debuginfo'
      ]
      subprocess.check_call(objcopy_cmd)
  
      strip_cmd = [args.strip, '--strip-all', '-R', '.comment', args.output]
      subprocess.check_call(strip_cmd)
  
      xz_cmd = ['xz', '-f', args.output + '.mini_debuginfo']
      subprocess.check_call(xz_cmd)
  
      objcopy_cmd = [
          args.objcopy, '--add-section', '.gnu_debugdata=' + args.output + '.mini_debuginfo.xz',
          args.output
      ]
      subprocess.check_call(objcopy_cmd)
  
      # Clean out scratch files
      rm_cmd = [
          'rm', '-f', args.output + '.dynsyms', args.output + '.funcsyms',
          args.output + '.keep_symbols', args.output + '.debug', args.output + '.mini_debuginfo',
          args.output + '.mini_debuginfo.xz'
      ]
      result = subprocess.call(rm_cmd)
  
      return result
  
  
  if __name__ == "__main__":
      sys.exit(main())
  

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