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1 # -*- python -*-
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2 # Copyright (C) 2009-2020 Free Software Foundation, Inc.
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3
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4 # This program is free software; you can redistribute it and/or modify
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5 # it under the terms of the GNU General Public License as published by
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6 # the Free Software Foundation; either version 3 of the License, or
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7 # (at your option) any later version.
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8 #
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9 # This program is distributed in the hope that it will be useful,
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10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 # GNU General Public License for more details.
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13 #
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14 # You should have received a copy of the GNU General Public License
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15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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16
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17 import sys
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18 import gdb
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19 import os
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20 import os.path
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21
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22 pythondir = '@pythondir@'
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23 libdir = '@toolexeclibdir@'
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24
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25 # This file might be loaded when there is no current objfile. This
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26 # can happen if the user loads it manually. In this case we don't
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27 # update sys.path; instead we just hope the user managed to do that
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28 # beforehand.
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29 if gdb.current_objfile () is not None:
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30 # Update module path. We want to find the relative path from libdir
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31 # to pythondir, and then we want to apply that relative path to the
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32 # directory holding the objfile with which this file is associated.
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33 # This preserves relocatability of the gcc tree.
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34
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35 # Do a simple normalization that removes duplicate separators.
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36 pythondir = os.path.normpath (pythondir)
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37 libdir = os.path.normpath (libdir)
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38
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39 prefix = os.path.commonprefix ([libdir, pythondir])
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40 # In some bizarre configuration we might have found a match in the
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41 # middle of a directory name.
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42 if prefix[-1] != '/':
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43 prefix = os.path.dirname (prefix) + '/'
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44
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45 # Strip off the prefix.
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46 pythondir = pythondir[len (prefix):]
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47 libdir = libdir[len (prefix):]
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48
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49 # Compute the ".."s needed to get from libdir to the prefix.
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50 dotdots = ('..' + os.sep) * len (libdir.split (os.sep))
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51
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52 objfile = gdb.current_objfile ().filename
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53 dir_ = os.path.join (os.path.dirname (objfile), dotdots, pythondir)
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54
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55 if not dir_ in sys.path:
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56 sys.path.insert(0, dir_)
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57
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58 # Call a function as a plain import would not execute body of the included file
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59 # on repeated reloads of this object file.
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60 from libstdcxx.v6 import register_libstdcxx_printers
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61 register_libstdcxx_printers(gdb.current_objfile())
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