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author | Xin Li <delphij@google.com> | 2020-08-27 10:16:29 -0700 |
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committer | Xin Li <delphij@google.com> | 2020-08-27 10:16:29 -0700 |
commit | 4d17d097be332673859253f40601c4370affd7ad (patch) | |
tree | a584d2288d20f844a8e8ff89c875dbf7ce5278af /files/tools_libyuv/valgrind/gdb_helper.py | |
parent | 179ebc697e2f9972f2fe7bd8d8f20c94ed334ccd (diff) | |
parent | 658fa7f244ce053b34a19b343b4ceb9bcacc20ec (diff) | |
download | libyuv-4d17d097be332673859253f40601c4370affd7ad.tar.gz |
Merge Android R (rvc-dev-plus-aosp-without-vendor@6692709)temp_sam_168057903
Bug: 166295507
Merged-In: I14d7f590626ed952689da92e72b4f0be8fff752f
Change-Id: I8f8254a06d6b6fdb726dbe8bcc162ef5a99fc546
Diffstat (limited to 'files/tools_libyuv/valgrind/gdb_helper.py')
-rw-r--r-- | files/tools_libyuv/valgrind/gdb_helper.py | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/files/tools_libyuv/valgrind/gdb_helper.py b/files/tools_libyuv/valgrind/gdb_helper.py new file mode 100644 index 00000000..d127f760 --- /dev/null +++ b/files/tools_libyuv/valgrind/gdb_helper.py @@ -0,0 +1,91 @@ +# Copyright (c) 2017 The WebRTC 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 in the root of the source +# tree. An additional intellectual property rights grant can be found +# in the file PATENTS. All contributing project authors may +# be found in the AUTHORS file in the root of the source tree. + +''' A bunch of helper functions for querying gdb.''' + +import logging +import os +import re +import tempfile + +GDB_LINE_RE = re.compile(r'Line ([0-9]*) of "([^"]*)".*') + +def _GdbOutputToFileLine(output_line): + ''' Parse the gdb output line, return a pair (file, line num) ''' + match = GDB_LINE_RE.match(output_line) + if match: + return match.groups()[1], match.groups()[0] + else: + return None + +def ResolveAddressesWithinABinary(binary_name, load_address, address_list): + ''' For each address, return a pair (file, line num) ''' + commands = tempfile.NamedTemporaryFile() + commands.write('add-symbol-file "%s" %s\n' % (binary_name, load_address)) + for addr in address_list: + commands.write('info line *%s\n' % addr) + commands.write('quit\n') + commands.flush() + gdb_commandline = 'gdb -batch -x %s 2>/dev/null' % commands.name + gdb_pipe = os.popen(gdb_commandline) + result = gdb_pipe.readlines() + + address_count = 0 + ret = {} + for line in result: + if line.startswith('Line'): + ret[address_list[address_count]] = _GdbOutputToFileLine(line) + address_count += 1 + if line.startswith('No line'): + ret[address_list[address_count]] = (None, None) + address_count += 1 + gdb_pipe.close() + commands.close() + return ret + +class AddressTable(object): + ''' Object to do batched line number lookup. ''' + def __init__(self): + self._load_addresses = {} + self._binaries = {} + self._all_resolved = False + + def AddBinaryAt(self, binary, load_address): + ''' Register a new shared library or executable. ''' + self._load_addresses[binary] = load_address + + def Add(self, binary, address): + ''' Register a lookup request. ''' + if binary == '': + logging.warn('adding address %s in empty binary?' % address) + if binary in self._binaries: + self._binaries[binary].append(address) + else: + self._binaries[binary] = [address] + self._all_resolved = False + + def ResolveAll(self): + ''' Carry out all lookup requests. ''' + self._translation = {} + for binary in self._binaries.keys(): + if binary != '' and binary in self._load_addresses: + load_address = self._load_addresses[binary] + addr = ResolveAddressesWithinABinary( + binary, load_address, self._binaries[binary]) + self._translation[binary] = addr + self._all_resolved = True + + def GetFileLine(self, binary, addr): + ''' Get the (filename, linenum) result of a previously-registered lookup + request. + ''' + if self._all_resolved: + if binary in self._translation: + if addr in self._translation[binary]: + return self._translation[binary][addr] + return (None, None) |