1 # Copyright (C) 2003-2019 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 $testfile]
37 set lib1_sl [standard_output_file shreloc1.sl]
38 set lib2_sl [standard_output_file shreloc2.sl]
40 if [get_compiler_info] {
45 set exec_opts [list debug shlib=$lib1_sl shlib=$lib2_sl]
47 if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
48 lappend lib_opts "ldflags=-Wl,--image-base,0x04000000"
51 if [test_compiler_info "xlc-*"] {
53 # IBM's xlc compiler does not add static variables to the ELF symbol
54 # table by default. We need this option to make the variables show
55 # up in "maint print msymbols".
57 lappend lib_opts "additional_flags=-qstatsym"
61 if { [gdb_compile_shlib $lib1src $lib1_sl $lib_opts] != ""} {
62 untested "could not build $lib1_sl."
64 } elseif { [gdb_compile_shlib $lib2src $lib2_sl $lib_opts] != ""} {
65 untested "could not build $lib1_s2."
67 } elseif { [gdb_compile $srcfile $binfile executable $exec_opts] != ""} {
68 untested "could not build $binfile."
72 # Start with a fresh gdb.
74 clean_restart $binfile
75 gdb_load_shlib $lib1_sl
76 gdb_load_shlib $lib2_sl
78 # Load up the shared objects
79 if ![runto_main] then {
80 fail "can't run to main"
85 # Check debugging symbol relocations
88 # Check extern function for relocation
89 set fn_1_addr [get_var_address fn_1]
90 set fn_2_addr [get_var_address fn_2]
92 if { "${fn_1_addr}" == "${fn_2_addr}" } {
93 fail "relocated extern functions have different addresses"
95 pass "relocated extern functions have different addresses"
98 # Check extern var for relocation
99 set extern_var_1_addr [get_var_address extern_var_1]
100 set extern_var_2_addr [get_var_address extern_var_2]
102 if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } {
103 fail "relocated extern variables have different addresses"
105 pass "relocated extern variables have different addresses"
108 # Check static var for relocation
109 set static_var_1_addr [get_var_address static_var_1]
110 set static_var_2_addr [get_var_address static_var_2]
112 if { "${static_var_1_addr}" == "${static_var_2_addr}" } {
113 fail "relocated static variables have different addresses"
115 pass "relocated static variables have different addresses"
119 # Check minimal symbol relocations
122 proc send_gdb_discard { command } {
123 # Send a command to gdb and discard output up to the next prompt
128 gdb_test_multiple "${command}" "${command}" {
129 -re ".*\[\r\n]+${gdb_prompt} $" {
133 fail "{$command} (timeout)"
139 proc get_msym_addrs { var msymfile } {
140 # Extract the list of values for symbols matching var in the
141 # minimal symbol output file
143 global gdb_prompt hex
146 send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n"
150 -re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" {
151 set result [concat $result $expect_out(1,string)]
154 -re "$gdb_prompt $" {
155 pass "get_msym_addrs ${var}"
159 -re "\[^\r\n\]*\[\r\n\]+" {
164 fail "get_msym_addrs ${var} (timeout)"
171 proc check_same {var msymfile} {
172 # Check that the minimal symbol values matching var are the same
174 set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]]
183 proc check_different {var msymfile} {
184 # Check that the minimal symbol values matching var are different
186 set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]]
189 if { [llength ${addr_list}] < 2 } {
193 foreach addr ${addr_list} {
194 if { ${prev} == ${addr} } {
203 if [is_remote host] {
204 set msymfile shreloc.txt
206 set msymfile [standard_output_file shreloc.txt]
209 if [send_gdb_discard "maint print msymbols ${msymfile}"] {
210 if {[check_different "static_var_\[12\]" "${msymfile}"]} {
211 pass "(msymbol) relocated static vars have different addresses"
213 fail "(msymbol) relocated static vars have different addresses"
216 if {[check_different "extern_var_\[12\]" "${msymfile}"]} {
217 pass "(msymbol) relocated extern vars have different addresses"
219 fail "(msymbol) relocated extern vars have different addresses"
222 if {[check_different "fn_\[12\]" "${msymfile}"]} {
223 pass "(msymbol) relocated functions have different addresses"
225 fail "(msymbol) relocated functions have different addresses"
229 if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
231 # We know the names of some absolute symbols included in the
232 # portable-executable (DLL) format. Check that they didn't get
235 # A better approach would be include absolute symbols via the assembler.
237 if {[check_same "_minor_os_version__" "${msymfile}"]} {
238 pass "absolute symbols not relocated"
240 fail "absolute symbols not relocated"