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6aba47ca | 1 | # Copyright (C) 2003, 2005, 2007 Free Software Foundation, Inc. |
53df362e RG |
2 | # |
3 | # This program is free software; you can redistribute it and/or modify | |
4 | # it under the terms of the GNU General Public License as published by | |
5 | # the Free Software Foundation; either version 2 of the License, or | |
6 | # (at your option) any later version. | |
7 | # | |
8 | # This program is distributed in the hope that it will be useful, | |
9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | # GNU General Public License for more details. | |
12 | # | |
13 | # You should have received a copy of the GNU General Public License | |
14 | # along with this program; if not, write to the Free Software | |
15 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
16 | # | |
17 | ||
53df362e RG |
18 | # Tests for shared object file relocation. If two shared objects have |
19 | # the same load address (actually, overlapping load spaces), one of | |
20 | # them gets relocated at load-time. Check that gdb gets the right | |
21 | # values for the debugging and minimal symbols. | |
22 | ||
d9407aaa NC |
23 | if {[istarget *-elf*] || [istarget *-coff] || [istarget *-aout]} then { |
24 | verbose "test skipped - shared object files not supported by this target." | |
25 | return 0 | |
26 | } | |
27 | ||
53df362e RG |
28 | if $tracelevel then { |
29 | strace $tracelevel | |
30 | } | |
31 | ||
32 | # | |
33 | # This file uses shreloc.c, shreloc1.c and shreloc2.c | |
34 | # | |
35 | ||
36 | set prms_id 0 | |
37 | set bug_id 0 | |
38 | ||
39 | set workdir ${objdir}/${subdir} | |
96b0c7ac DJ |
40 | set testfile "shreloc" |
41 | set libfile1 "shreloc1" | |
42 | set libfile2 "shreloc2" | |
43 | set srcfile $srcdir/$subdir/$testfile.c | |
44 | set lib1src $srcdir/$subdir/$libfile1.c | |
45 | set lib2src $srcdir/$subdir/$libfile2.c | |
46 | set binfile $objdir/$subdir/$testfile | |
47 | set lib1_sl $objdir/$subdir/$libfile1.sl | |
48 | set lib2_sl $objdir/$subdir/$libfile2.sl | |
49 | ||
50 | if [get_compiler_info ${binfile}] { | |
51 | return -1 | |
53df362e RG |
52 | } |
53 | ||
96b0c7ac DJ |
54 | set lib_opts "debug" |
55 | set exec_opts [list debug shlib=$lib1_sl shlib=$lib2_sl] | |
53df362e RG |
56 | |
57 | if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } { | |
05cfdb42 | 58 | lappend lib_opts "ldflags=-Wl,--image-base,0x04000000" |
53df362e RG |
59 | } |
60 | ||
96b0c7ac DJ |
61 | if [test_compiler_info "xlc-*"] { |
62 | ||
63 | # IBM's xlc compiler does not add static variables to the ELF symbol | |
64 | # table by default. We need this option to make the variables show | |
65 | # up in "maint print msymbols". | |
66 | ||
67 | lappend lib_opts "additional_flags=-qstatsym" | |
68 | ||
53df362e RG |
69 | } |
70 | ||
96b0c7ac DJ |
71 | if { [gdb_compile_shlib $lib1src $lib1_sl $lib_opts] != ""} { |
72 | untested "Could not build $lib1_sl." | |
73 | return -1 | |
74 | } elseif { [gdb_compile_shlib $lib2src $lib2_sl $lib_opts] != ""} { | |
75 | untested "Could not build $lib1_s2." | |
76 | return -1 | |
77 | } elseif { [gdb_compile $srcfile $binfile executable $exec_opts] != ""} { | |
78 | untested "Could not build $binfile." | |
53df362e RG |
79 | return -1 |
80 | } | |
81 | ||
96b0c7ac DJ |
82 | # Start with a fresh gdb. |
83 | ||
53df362e RG |
84 | gdb_exit |
85 | gdb_start | |
86 | gdb_reinitialize_dir $srcdir/$subdir | |
87 | gdb_load ${workdir}/shreloc | |
88 | ||
89 | # Load up the shared objects | |
90 | if ![runto_main] then { | |
91 | fail "Can't run to main" | |
92 | return 0 | |
93 | } | |
94 | ||
95 | proc get_var_address { var } { | |
96 | global gdb_prompt hex | |
97 | ||
98 | send_gdb "print &${var}\n" | |
99 | # Match output like: | |
100 | # $1 = (int *) 0x0 | |
101 | # $5 = (int (*)()) 0 | |
102 | # $6 = (int (*)()) 0x24 <function_bar> | |
103 | gdb_expect { | |
104 | -re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $" | |
105 | { | |
106 | pass "get address of ${var}" | |
107 | if { $expect_out(1,string) == "0" } { | |
108 | return "0x0" | |
109 | } else { | |
110 | return $expect_out(1,string) | |
111 | } | |
112 | } | |
113 | -re "${gdb_prompt} $" | |
114 | { fail "get address of ${var} (unknown output)" } | |
115 | timeout | |
116 | { fail "get address of ${var} (timeout)" } | |
117 | } | |
118 | return "" | |
119 | } | |
120 | ||
121 | # | |
122 | # Check debugging symbol relocations | |
123 | # | |
124 | ||
125 | # Check extern function for relocation | |
126 | set fn_1_addr [get_var_address fn_1] | |
127 | set fn_2_addr [get_var_address fn_2] | |
128 | ||
129 | if { "${fn_1_addr}" == "${fn_2_addr}" } { | |
130 | fail "relocated extern functions have different addresses" | |
131 | } else { | |
132 | pass "relocated extern functions have different addresses" | |
133 | } | |
134 | ||
135 | # Check extern var for relocation | |
136 | set extern_var_1_addr [get_var_address extern_var_1] | |
137 | set extern_var_2_addr [get_var_address extern_var_2] | |
138 | ||
139 | if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } { | |
140 | fail "relocated extern variables have different addresses" | |
141 | } else { | |
142 | pass "relocated extern variables have different addresses" | |
143 | } | |
144 | ||
145 | # Check static var for relocation | |
146 | set static_var_1_addr [get_var_address static_var_1] | |
147 | set static_var_2_addr [get_var_address static_var_2] | |
148 | ||
149 | if { "${static_var_1_addr}" == "${static_var_2_addr}" } { | |
150 | fail "relocated static variables have different addresses" | |
151 | } else { | |
152 | pass "relocated static variables have different addresses" | |
153 | } | |
154 | ||
155 | # | |
156 | # Check minimal symbol relocations | |
157 | # | |
158 | ||
159 | proc send_gdb_discard { command } { | |
160 | # Send a command to gdb and discard output up to the next prompt | |
161 | ||
162 | global gdb_prompt | |
163 | ||
164 | send_gdb "${command}\n" | |
165 | ||
166 | # Discard output | |
167 | gdb_expect { | |
168 | -re ".*\[\r\n]+${gdb_prompt} $" { | |
169 | return 1 | |
170 | } | |
171 | timeout { | |
172 | fail "{$command} (timeout)" | |
173 | return 0 | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | proc get_msym_addrs { var msymfile } { | |
179 | # Extract the list of values for symbols matching var in the | |
180 | # minimal symbol output file | |
181 | ||
182 | global gdb_prompt hex | |
183 | set result "" | |
184 | ||
185 | send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n" | |
186 | ||
187 | while 1 { | |
188 | gdb_expect { | |
189 | -re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" { | |
190 | set result [concat $result $expect_out(1,string)] | |
191 | } | |
192 | ||
193 | -re "$gdb_prompt $" { | |
a8b7528f | 194 | pass "get_msym_addrs ${var}" |
53df362e RG |
195 | return "${result}" |
196 | } | |
197 | ||
198 | -re "\[^\r\n\]*\[\r\n\]+" { | |
199 | # Skip | |
200 | } | |
201 | ||
202 | timeout { | |
203 | fail "get_msym_addrs ${var} (timeout)" | |
204 | return -1 | |
205 | } | |
206 | } | |
207 | } | |
208 | } | |
209 | ||
210 | proc check_same {var msymfile} { | |
211 | # Check that the minimal symbol values matching var are the same | |
212 | ||
213 | set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]] | |
214 | ||
215 | if { $len == 1 } { | |
216 | return 1 | |
217 | } else { | |
218 | return 0 | |
219 | } | |
220 | } | |
221 | ||
222 | proc check_different {var msymfile} { | |
223 | # Check that the minimal symbol values matching var are different | |
224 | ||
225 | set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]] | |
226 | set prev "" | |
227 | ||
228 | if { [llength ${addr_list}] < 2 } { | |
229 | return 0 | |
230 | } | |
231 | ||
232 | foreach addr ${addr_list} { | |
233 | if { ${prev} == ${addr} } { | |
234 | return 0 | |
235 | } | |
236 | set prev ${addr} | |
237 | } | |
238 | ||
239 | return 1 | |
240 | } | |
241 | ||
242 | set msymfile "${workdir}/shreloc.txt" | |
243 | ||
244 | if [send_gdb_discard "maint print msymbols ${msymfile}"] { | |
245 | if {[check_different "static_var_\[12\]" "${msymfile}"]} { | |
246 | pass "(msymbol) relocated static vars have different addresses" | |
247 | } else { | |
248 | fail "(msymbol) relocated static vars have different addresses" | |
249 | } | |
250 | ||
251 | if {[check_different "extern_var_\[12\]" "${msymfile}"]} { | |
252 | pass "(msymbol) relocated extern vars have different addresses" | |
253 | } else { | |
254 | fail "(msymbol) relocated extern vars have different addresses" | |
255 | } | |
256 | ||
257 | if {[check_different "fn_\[12\]" "${msymfile}"]} { | |
258 | pass "(msymbol) relocated functions have different addresses" | |
259 | } else { | |
260 | fail "(msymbol) relocated functions have different addresses" | |
261 | } | |
262 | } | |
263 | ||
264 | if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } { | |
265 | # | |
266 | # We know the names of some absolute symbols included in the | |
267 | # portable-executable (DLL) format. Check that they didn't get | |
268 | # relocated. | |
269 | # | |
270 | # A better approach would be include absolute symbols via the assembler. | |
271 | # | |
272 | if {[check_same "_minor_os_version__" "${msymfile}"]} { | |
273 | pass "Absolute symbols not relocated" | |
274 | } else { | |
275 | fail "Absolute symbols not relocated" | |
276 | } | |
277 | } |