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#!/usr/bin/env python3
# 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).
"""
import argparse
import os
import posixpath
import sys
import time
def main(args=None):
parser = argparse.ArgumentParser()
parser.add_argument('-e', '--exe') # Path of the debug-library.so.
# Silently swallow the other unnecessary arguments.
parser.add_argument('-C', '--demangle', action='store_true')
parser.add_argument('-f', '--functions', action='store_true')
parser.add_argument('-i', '--inlines', action='store_true')
options = parser.parse_args()
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))
else:
print('mock_sym_for_addr_%d' % addr)
print('mock_src/%s.c:%d' % (lib_file_name, addr))
sys.stdout.flush()
if __name__ == '__main__':
main(sys.argv)
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