1 # Copyright (C) 2003-2023 Free Software Foundation, Inc.
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 3 of the License, or
6 # (at your option) any later version.
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.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17 # Tests for shared object file relocation. If two shared objects have
18 # the same load address (actually, overlapping load spaces), one of
19 # them gets relocated at load-time. Check that gdb gets the right
20 # values for the debugging and minimal symbols.
22 if {[skip_shlib_tests]} {
27 # This file uses shreloc.c, shreloc1.c and shreloc2.c
31 standard_testfile .c shreloc1.c shreloc2.c
33 set srcfile $srcdir/$subdir/$srcfile
34 set lib1src $srcdir/$subdir/$srcfile2
35 set lib2src $srcdir/$subdir/$srcfile3
36 set binfile [standard_output_file $testfile]
37 set lib1_sl [standard_output_file shreloc1.sl]
38 set lib2_sl [standard_output_file shreloc2.sl]
41 set exec_opts [list debug shlib=$lib1_sl shlib=$lib2_sl]
43 if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
44 lappend lib_opts "ldflags=-Wl,--image-base,0x04000000"
47 if [test_compiler_info "xlc-*"] {
49 # IBM's xlc compiler does not add static variables to the ELF symbol
50 # table by default. We need this option to make the variables show
51 # up in "maint print msymbols".
53 lappend lib_opts "additional_flags=-qstatsym"
57 if { [gdb_compile_shlib $lib1src $lib1_sl $lib_opts] != ""} {
58 untested "could not build $lib1_sl."
60 } elseif { [gdb_compile_shlib $lib2src $lib2_sl $lib_opts] != ""} {
61 untested "could not build $lib1_s2."
63 } elseif { [gdb_compile $srcfile $binfile executable $exec_opts] != ""} {
64 untested "could not build $binfile."
68 # Start with a fresh gdb.
70 clean_restart $binfile
71 gdb_load_shlib $lib1_sl
72 gdb_load_shlib $lib2_sl
74 # Load up the shared objects
80 # Check debugging symbol relocations
83 # Check extern function for relocation
84 set fn_1_addr [get_var_address fn_1]
85 set fn_2_addr [get_var_address fn_2]
87 if { "${fn_1_addr}" == "${fn_2_addr}" } {
88 fail "relocated extern functions have different addresses"
90 pass "relocated extern functions have different addresses"
93 # Check extern var for relocation
94 set extern_var_1_addr [get_var_address extern_var_1]
95 set extern_var_2_addr [get_var_address extern_var_2]
97 if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } {
98 fail "relocated extern variables have different addresses"
100 pass "relocated extern variables have different addresses"
103 # Check static var for relocation
104 set static_var_1_addr [get_var_address static_var_1]
105 set static_var_2_addr [get_var_address static_var_2]
107 if { "${static_var_1_addr}" == "${static_var_2_addr}" } {
108 fail "relocated static variables have different addresses"
110 pass "relocated static variables have different addresses"
114 # Check minimal symbol relocations
117 proc send_gdb_discard { command } {
118 # Send a command to gdb and discard output up to the next prompt
123 gdb_test_multiple "${command}" "${command}" {
124 -re ".*\[\r\n]+${gdb_prompt} $" {
128 fail "{$command} (timeout)"
134 proc get_msym_addrs { var msymfile } {
135 # Extract the list of values for symbols matching var in the
136 # minimal symbol output file
138 global gdb_prompt hex
141 send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n"
145 -re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" {
146 set result [concat $result $expect_out(1,string)]
149 -re "$gdb_prompt $" {
150 pass "get_msym_addrs ${var}"
154 -re "\[^\r\n\]*\[\r\n\]+" {
159 fail "get_msym_addrs ${var} (timeout)"
166 proc check_same {var msymfile} {
167 # Check that the minimal symbol values matching var are the same
169 set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]]
178 proc check_different {var msymfile} {
179 # Check that the minimal symbol values matching var are different
181 set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]]
184 if { [llength ${addr_list}] < 2 } {
188 foreach addr ${addr_list} {
189 if { ${prev} == ${addr} } {
198 if [is_remote host] {
199 set msymfile shreloc.txt
201 set msymfile [standard_output_file shreloc.txt]
204 if [send_gdb_discard "maint print msymbols ${msymfile}"] {
205 if {[check_different "static_var_\[12\]" "${msymfile}"]} {
206 pass "(msymbol) relocated static vars have different addresses"
208 fail "(msymbol) relocated static vars have different addresses"
211 if {[check_different "extern_var_\[12\]" "${msymfile}"]} {
212 pass "(msymbol) relocated extern vars have different addresses"
214 fail "(msymbol) relocated extern vars have different addresses"
217 if {[check_different "fn_\[12\]" "${msymfile}"]} {
218 pass "(msymbol) relocated functions have different addresses"
220 fail "(msymbol) relocated functions have different addresses"
224 if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
226 # We know the names of some absolute symbols included in the
227 # portable-executable (DLL) format. Check that they didn't get
230 # A better approach would be include absolute symbols via the assembler.
232 if {[check_same "_minor_os_version__" "${msymfile}"]} {
233 pass "absolute symbols not relocated"
235 fail "absolute symbols not relocated"