1# Copyright 2015 The Chromium OS Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5import logging
6
7from autotest_lib.client.bin import utils
8
9
10_ASAN_SYMBOL = "__asan_init"
11
12
13def running_on_asan(binary="debugd"):
14    """Returns whether we're running on ASan.
15
16    @param binary: file to test for ASan symbols.
17    """
18    # -q, --quiet         * Only output 'bad' things
19    # -F, --format <arg>  * Use specified format for output
20    # -g, --gmatch        * Use regex rather than string compare (with -s)
21    # -s, --symbol <arg>  * Find a specified symbol
22    scanelf_command = "scanelf -qF'%s#F'"
23    scanelf_command += " -gs %s `which %s`" % (_ASAN_SYMBOL, binary)
24    symbol = utils.system_output(scanelf_command)
25    logging.debug("running_on_asan(): symbol: '%s', _ASAN_SYMBOL: '%s'",
26                  symbol, _ASAN_SYMBOL)
27    return symbol != ""
28