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[/] [altor32/] [trunk/] [gcc-x64/] [or1knd-elf/] [share/] [gdb/] [python/] [gdb/] [function/] [strfns.py] - Rev 35
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# Useful gdb string convenience functions. # Copyright (C) 2012 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. """$_memeq, $_strlen, $_streq, $_regex""" import gdb import re class _MemEq(gdb.Function): """$_memeq - compare bytes of memory Usage: $_memeq(a, b, len) Returns: True if len bytes at a and b compare equally. """ def __init__(self): super(_MemEq, self).__init__("_memeq") def invoke(self, a, b, length): if length < 0: raise ValueError("length must be non-negative") if length == 0: return True # The argument(s) to vector are [low_bound,]high_bound. byte_vector = gdb.lookup_type("char").vector(length - 1) ptr_byte_vector = byte_vector.pointer() a_ptr = a.reinterpret_cast(ptr_byte_vector) b_ptr = b.reinterpret_cast(ptr_byte_vector) return a_ptr.dereference() == b_ptr.dereference() class _StrLen(gdb.Function): """$_strlen - compute string length Usage: $_strlen(a) Returns: Length of string a, assumed to be a string in the current language. """ def __init__(self): super(_StrLen, self).__init__("_strlen") def invoke(self, a): s = a.string() return len(s) class _StrEq(gdb.Function): """$_streq - check string equality Usage: $_streq(a, b) Returns: True if a and b are identical strings in the current language. Example (amd64-linux): catch syscall open cond $bpnum $_streq((char*) $rdi, "foo") """ def __init__(self): super(_StrEq, self).__init__("_streq") def invoke(self, a, b): return a.string() == b.string() class _RegEx(gdb.Function): """$_regex - check if a string matches a regular expression Usage: $_regex(string, regex) Returns: True if string str (in the current language) matches the regular expression regex. """ def __init__(self): super(_RegEx, self).__init__("_regex") def invoke(self, string, regex): s = string.string() r = re.compile(regex.string()) return bool(r.match(s)) # GDB will import us automagically via gdb/__init__.py. _MemEq() _StrLen() _StrEq() _RegEx()