gdb/contrib/expect-read1.sh

   1 #! /bin/sh
   2 # runtest wrapper to reliably reproduce racy incomplete reads in the testsuite.
   3
   4 # Copyright (C) 2013-2024 Free Software Foundation, Inc.
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 # This tool exercises any incomplete reads handling in the testsuite by
  19 # simulating read always returns just 1 character.
  20 # Testsuite incompatibilities are tracked as GDB PR testsuite/12649.
  21
  22 # Example usage:
  23 #
  24 # bash$ cd $objdir/gdb/testsuite
  25 # bash$ EXPECT=$srcdir/gdb/contrib/expect-read1.sh runtest
  26 # or
  27 # bash$ EXPECT=../contrib/expect-read1.sh runtest
  28
  29 # Find source file.
  30 C=$(echo "$0" | sed 's/\.sh$/.c/')
  31 if ! test -e "$C"; then
  32   echo >&2 "$0: Cannot find 'srcdir/gdb/contrib/expect-read1.c' at '$C'."
  33   exit 2
  34 fi
  35
  36 # Create temp directory.
  37 tmpdir=$(mktemp -d)
  38
  39 # Schedule cleanup.
  40 trap 'rm -rf $tmpdir' EXIT
  41
  42 # Compile shared library.
  43 SO=$tmpdir/expect-read1.so
  44 CMD="${CC_FOR_TARGET:-gcc} -o $SO -Wall -fPIC -shared $C"
  45 if ! $CMD; then
  46   echo >&2 "$0: Failed: $CMD"
  47   exit 2
  48 fi
  49
  50 # Call expect with the shared library preloaded.
  51 LD_PRELOAD=$SO expect "$@"
  52
  53 # Local Variables:
  54 # mode:shell-script
  55 # sh-indentation:2
  56 # End:
  57 # vi:sw=2