scripts/check-c++-types.sh

   1 #!/bin/bash
   2 # Copyright (C) 2003-2024 Free Software Foundation, Inc.
   3 # This file is part of the GNU C Library.
   4
   5 # The GNU C Library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2.1 of the License, or (at your option) any later version.
   9
  10 # The GNU C Library 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 GNU
  13 # Lesser General Public License for more details.
  14
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with the GNU C Library; if not, see
  17 # <https://www.gnu.org/licenses/>.
  18
  19 # This script creates a list of data types where each type is followed
  20 # by the C++ mangled name for that type.  That list is then compared
  21 # against the list in the c++-types.data file for the platform being
  22 # checked.  Any difference between the two would mean that the C++ ABI
  23 # had changed and that should not happen even if the change is compatible
  24 # at the C language level.
  25
  26 #
  27 # The list of data types has been created with
  28 # cat <<EOF |
  29 # #include <sys/types.h>
  30 # #include <unistd.h>
  31 # #include <sys/resource.h>
  32 # #include <sys/stat.h>
  33 # EOF
  34 # gcc -D_GNU_SOURCE -E - |
  35 # grep -E '^typedef.*;$' |
  36 # sed 's/^typedef[[:space:]]*//;s/\([[:space:]]\{1,\}__attribute__.*\);/;/;s/.*[[:space:]]\([*]\|\)\(.*\);/\2/' |
  37 # grep -E -v '^_' |
  38 # LC_ALL=C sort -u
  39 #
  40 data=$1
  41 shift
  42 cxx=$(echo $* | sed 's/-fgnu89-inline//')
  43 while read t; do
  44   echo -n "$t:"
  45   $cxx -S -xc++ -o - -D_GNU_SOURCE <(cat <<EOF
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48 #include <sys/resource.h>
  49 #include <unistd.h>
  50 void foo ($t) { }
  51 EOF
  52 ) |
  53   sed 's/[[:space:]]*[.]globa\?l[[:space:]]*_Z3foo\([_[:alnum:]]*\).*/\1/p;d'
  54 done <<EOF |
  55 blkcnt64_t
  56 blkcnt_t
  57 blksize_t
  58 caddr_t
  59 clockid_t
  60 clock_t
  61 daddr_t
  62 dev_t
  63 fd_mask
  64 fsblkcnt64_t
  65 fsblkcnt_t
  66 fsfilcnt64_t
  67 fsfilcnt_t
  68 fsid_t
  69 gid_t
  70 id_t
  71 ino64_t
  72 ino_t
  73 int16_t
  74 int32_t
  75 int64_t
  76 int8_t
  77 intptr_t
  78 key_t
  79 loff_t
  80 mode_t
  81 nlink_t
  82 off64_t
  83 off_t
  84 pid_t
  85 pthread_attr_t
  86 pthread_barrier_t
  87 pthread_barrierattr_t
  88 pthread_cond_t
  89 pthread_condattr_t
  90 pthread_key_t
  91 pthread_mutex_t
  92 pthread_mutexattr_t
  93 pthread_once_t
  94 pthread_rwlock_t
  95 pthread_rwlockattr_t
  96 pthread_spinlock_t
  97 pthread_t
  98 quad_t
  99 register_t
 100 rlim64_t
 101 rlim_t
 102 sigset_t
 103 size_t
 104 socklen_t
 105 ssize_t
 106 suseconds_t
 107 time_t
 108 u_char
 109 uid_t
 110 uint
 111 u_int
 112 u_int16_t
 113 u_int32_t
 114 u_int64_t
 115 u_int8_t
 116 ulong
 117 u_long
 118 u_quad_t
 119 useconds_t
 120 ushort
 121 u_short
 122 EOF
 123 diff -N -U0 $data -