| #!/usr/bin/env python |
| # Copyright 2014 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. |
| |
| """Simple mock for addr2line. |
| |
| Outputs mock symbol information, with each symbol being a function of the |
| original address (so it is easy to double-check consistency in unittests). |
| """ |
| |
| from __future__ import print_function |
| |
| import optparse |
| import os |
| import posixpath |
| import sys |
| import time |
| |
| |
| def main(argv): |
| parser = optparse.OptionParser() |
| parser.add_option('-e', '--exe', dest='exe') # Path of the debug-library.so. |
| # Silently swallow the other unnecessary arguments. |
| parser.add_option('-C', '--demangle', action='store_true') |
| parser.add_option('-f', '--functions', action='store_true') |
| parser.add_option('-i', '--inlines', action='store_true') |
| options, _ = parser.parse_args(argv[1:]) |
| lib_file_name = posixpath.basename(options.exe) |
| processed_sym_count = 0 |
| crash_every = int(os.environ.get('MOCK_A2L_CRASH_EVERY', 0)) |
| hang_every = int(os.environ.get('MOCK_A2L_HANG_EVERY', 0)) |
| |
| while(True): |
| line = sys.stdin.readline().rstrip('\r') |
| if not line: |
| break |
| |
| # An empty line should generate '??,??:0' (is used as marker for inlines). |
| if line == '\n': |
| print('??') |
| print('??:0') |
| sys.stdout.flush() |
| continue |
| |
| addr = int(line, 16) |
| processed_sym_count += 1 |
| if crash_every and processed_sym_count % crash_every == 0: |
| sys.exit(1) |
| if hang_every and processed_sym_count % hang_every == 0: |
| time.sleep(1) |
| |
| # Addresses < 1M will return good mock symbol information. |
| if addr < 1024 * 1024: |
| print('mock_sym_for_addr_%d' % addr) |
| print('mock_src/%s.c:%d' % (lib_file_name, addr)) |
| |
| # Addresses 1M <= x < 2M will return symbols with a name but a missing path. |
| elif addr < 2 * 1024 * 1024: |
| print('mock_sym_for_addr_%d' % addr) |
| print('??:0') |
| |
| # Addresses 2M <= x < 3M will return unknown symbol information. |
| elif addr < 3 * 1024 * 1024: |
| print('??') |
| print('??') |
| |
| # Addresses 3M <= x < 4M will return inlines. |
| elif addr < 4 * 1024 * 1024: |
| print('mock_sym_for_addr_%d_inner' % addr) |
| print('mock_src/%s.c:%d' % (lib_file_name, addr)) |
| print('mock_sym_for_addr_%d_middle' % addr) |
| print('mock_src/%s.c:%d' % (lib_file_name, addr)) |
| print('mock_sym_for_addr_%d_outer' % addr) |
| print('mock_src/%s.c:%d' % (lib_file_name, addr)) |
| |
| sys.stdout.flush() |
| |
| |
| if __name__ == '__main__': |
| main(sys.argv) |