1#!/usr/bin/env python 2# Copyright 2014 The Chromium Authors. All rights reserved. 3# Use of this source code is governed by a BSD-style license that can be 4# found in the LICENSE file. 5 6"""Simple mock for addr2line. 7 8Outputs mock symbol information, with each symbol being a function of the 9original address (so it is easy to double-check consistency in unittests). 10""" 11 12import optparse 13import os 14import posixpath 15import sys 16import time 17 18 19def main(argv): 20 parser = optparse.OptionParser() 21 parser.add_option('-e', '--exe', dest='exe') # Path of the debug-library.so. 22 # Silently swallow the other unnecessary arguments. 23 parser.add_option('-C', '--demangle', action='store_true') 24 parser.add_option('-f', '--functions', action='store_true') 25 parser.add_option('-i', '--inlines', action='store_true') 26 options, _ = parser.parse_args(argv[1:]) 27 lib_file_name = posixpath.basename(options.exe) 28 processed_sym_count = 0 29 crash_every = int(os.environ.get('MOCK_A2L_CRASH_EVERY', 0)) 30 hang_every = int(os.environ.get('MOCK_A2L_HANG_EVERY', 0)) 31 32 while(True): 33 line = sys.stdin.readline().rstrip('\r') 34 if not line: 35 break 36 37 # An empty line should generate '??,??:0' (is used as marker for inlines). 38 if line == '\n': 39 print '??' 40 print '??:0' 41 sys.stdout.flush() 42 continue 43 44 addr = int(line, 16) 45 processed_sym_count += 1 46 if crash_every and processed_sym_count % crash_every == 0: 47 sys.exit(1) 48 if hang_every and processed_sym_count % hang_every == 0: 49 time.sleep(1) 50 51 # Addresses < 1M will return good mock symbol information. 52 if addr < 1024 * 1024: 53 print 'mock_sym_for_addr_%d' % addr 54 print 'mock_src/%s.c:%d' % (lib_file_name, addr) 55 56 # Addresses 1M <= x < 2M will return symbols with a name but a missing path. 57 elif addr < 2 * 1024 * 1024: 58 print 'mock_sym_for_addr_%d' % addr 59 print '??:0' 60 61 # Addresses 2M <= x < 3M will return unknown symbol information. 62 elif addr < 3 * 1024 * 1024: 63 print '??' 64 print '??' 65 66 # Addresses 3M <= x < 4M will return inlines. 67 elif addr < 4 * 1024 * 1024: 68 print 'mock_sym_for_addr_%d_inner' % addr 69 print 'mock_src/%s.c:%d' % (lib_file_name, addr) 70 print 'mock_sym_for_addr_%d_middle' % addr 71 print 'mock_src/%s.c:%d' % (lib_file_name, addr) 72 print 'mock_sym_for_addr_%d_outer' % addr 73 print 'mock_src/%s.c:%d' % (lib_file_name, addr) 74 75 sys.stdout.flush() 76 77 78if __name__ == '__main__': 79 main(sys.argv)