Mercurial > hg > CbC > CbC_gcc
annotate contrib/compare-debug @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 22 Mar 2011 17:18:12 +0900 |
parents | 77e2b8dfacca |
children | 04ced10e8804 |
rev | line source |
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0 | 1 #! /bin/sh |
2 | |
3 # Compare stripped copies of two given object files. | |
4 | |
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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5 # Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation |
0 | 6 # Originally by Alexandre Oliva <aoliva@redhat.com> |
7 | |
8 # This file is part of GCC. | |
9 | |
10 # GCC is free software; you can redistribute it and/or modify it under | |
11 # the terms of the GNU General Public License as published by the Free | |
12 # Software Foundation; either version 3, or (at your option) any later | |
13 # version. | |
14 | |
15 # GCC is distributed in the hope that it will be useful, but WITHOUT | |
16 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
17 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
18 # License for more details. | |
19 | |
20 # You should have received a copy of the GNU General Public License | |
21 # along with GCC; see the file COPYING3. If not see | |
22 # <http://www.gnu.org/licenses/>. | |
23 | |
24 rm='rm -f' | |
25 | |
26 case $1 in | |
27 -p | --preserve) | |
28 rm='echo preserving' | |
29 shift | |
30 ;; | |
31 esac | |
32 | |
33 if test $# != 2; then | |
34 echo 'usage: compare-debug file1.o file2.o' >&2 | |
35 exit 1 | |
36 fi | |
37 | |
38 if test ! -f "$1"; then | |
39 echo "$1" does not exist >&2 | |
40 exit 1 | |
41 fi | |
42 | |
43 if test ! -f "$2"; then | |
44 echo "$2" does not exist >&2 | |
45 exit 1 | |
46 fi | |
47 | |
48 suf1=stripped | |
49 while test -f "$1.$suf1"; do | |
50 suf1=$suf1. | |
51 done | |
52 | |
53 suf2=stripped | |
54 while test -f "$2.$suf2"; do | |
55 suf2=$suf2. | |
56 done | |
57 | |
58 trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15 | |
59 | |
55
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60 case `uname -s` in |
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61 Darwin) |
67
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62 # The strip command on darwin does not remove all debug info. |
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63 # Fortunately, we can use ld to do it instead. |
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64 ld -S -r -no_uuid "$1" -o "$1.$suf1" |
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65 ld -S -r -no_uuid "$2" -o "$2.$suf2" |
55
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66 ;; |
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67 *) |
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68 cp "$1" "$1.$suf1" |
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69 strip "$1.$suf1" |
0 | 70 |
55
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71 cp "$2" "$2.$suf2" |
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72 strip "$2.$suf2" |
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73 ;; |
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74 esac |
0 | 75 |
76 if cmp "$1.$suf1" "$2.$suf2"; then | |
77 status=0 | |
78 else | |
79 status=1 | |
36 | 80 |
81 # Assembler-generated CFI will add an .eh_frame section for -g not | |
82 # present in -g0. Try to cope with it by checking that an .eh_frame | |
83 # section is present in either object file, and then stripping it | |
84 # off before re-comparing. | |
85 | |
86 cmd= | |
87 cmp1= | |
88 cmp2= | |
89 | |
90 for t in objdump readelf eu-readelf; do | |
55
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91 if ($t --help) 2>&1 | grep ' --\[*section-\]*headers' > /dev/null; then |
36 | 92 cmd=$t |
93 | |
94 $cmd --section-headers "$1.$suf1" | grep '\.eh_frame' > /dev/null | |
95 cmp1=$? | |
96 | |
97 $cmd --section-headers "$2.$suf2" | grep '\.eh_frame' > /dev/null | |
98 cmp2=$? | |
99 | |
100 break | |
101 fi | |
102 done | |
103 | |
104 # If we found .eh_frame in one but not the other, or if we could not | |
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105 # find a command to tell, or if there are LTO sections, try to strip |
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106 # off the .eh_frame and LTO sections from both. |
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107 if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x" || |
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108 $cmd --section-headers "$1.$suf1" | grep '.gnu.lto_' > /dev/null || |
f6334be47118
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109 $cmd --section-headers "$2.$suf2" | grep '.gnu.lto_' > /dev/null ; then |
36 | 110 suf3=$suf1. |
111 while test -f "$1.$suf3"; do | |
112 suf3=$suf3. | |
113 done | |
114 | |
115 suf4=$suf2. | |
116 while test -f "$2.$suf4"; do | |
117 suf4=$suf4. | |
118 done | |
119 | |
120 trap 'rm -f "$1.$suf1" "$2.$suf2" "$1.$suf3" "$2.$suf4"' 0 1 2 15 | |
121 | |
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parents:
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122 echo stripping off .eh_frame and LTO sections, then retrying >&2 |
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123 |
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124 seclist=".eh_frame .rel.eh_frame .rela.eh_frame" |
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125 if test "x$cmd" != "x"; then |
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126 seclist="$seclist "`{ $cmd --section-headers "$1.$suf1"; $cmd --section-headers "$2.$suf2"; } | sed -n 's,.* \(\.gnu\.lto_[^ ]*\).*,\1,p' | sort -u` |
f6334be47118
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127 fi |
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128 rsopts=`for sec in $seclist; do echo " --remove-section $sec"; done` |
36 | 129 |
55
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130 if (objcopy -v) 2>&1 | grep ' --remove-section' > /dev/null; then |
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131 objcopy $rsopts "$1.$suf1" "$1.$suf3" |
36 | 132 mv "$1.$suf3" "$1.$suf1" |
133 | |
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134 objcopy $rsopts "$2.$suf2" "$2.$suf4" |
36 | 135 mv "$2.$suf4" "$2.$suf2" |
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136 elif (strip --help) 2>&1 | grep ' --remove-section' > /dev/null; then |
36 | 137 cp "$1.$suf1" "$1.$suf3" |
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138 strip $rsopts "$1.$suf3" |
36 | 139 mv "$1.$suf3" "$1.$suf1" |
140 | |
141 cp "$2.$suf2" "$2.$suf4" | |
67
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142 strip $rsopts "$2.$suf4" |
36 | 143 mv "$2.$suf4" "$2.$suf2" |
144 else | |
145 echo failed to strip off .eh_frame >&2 | |
146 fi | |
147 | |
148 trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15 | |
149 | |
150 if cmp "$1.$suf1" "$2.$suf2"; then | |
151 status=0 | |
152 else | |
153 status=1 | |
154 fi | |
155 fi | |
0 | 156 fi |
157 | |
158 $rm "$1.$suf1" "$2.$suf2" | |
159 | |
160 trap "exit $status; exit" 0 1 2 15 | |
161 | |
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162 if test -f "$1".gkd || test -f "$2".gkd; then |
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163 if cmp "$1".gkd "$2".gkd; then |
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164 : |
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165 else |
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166 status=$? |
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167 fi |
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168 fi |
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169 |
0 | 170 exit $status |