1 # Copyright (C) 2003-2024 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 require allow_shlib_tests
25 # This file uses shreloc.c, shreloc1.c and shreloc2.c
29 standard_testfile .c shreloc1.c shreloc2.c
31 set srcfile $srcdir/$subdir/$srcfile
32 set lib1src $srcdir/$subdir/$srcfile2
33 set lib2src $srcdir/$subdir/$srcfile3
34 set binfile [standard_output_file $testfile]
35 set lib1_sl [standard_output_file shreloc1.sl]
36 set lib2_sl [standard_output_file shreloc2.sl]
39 set exec_opts [list debug shlib=$lib1_sl shlib=$lib2_sl]
41 if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
42 lappend lib_opts "ldflags=-Wl,--image-base,0x04000000"
45 if [test_compiler_info "xlc-*"] {
47 # IBM's xlc compiler does not add static variables to the ELF symbol
48 # table by default. We need this option to make the variables show
49 # up in "maint print msymbols".
51 lappend lib_opts "additional_flags=-qstatsym"
55 if { [gdb_compile_shlib $lib1src $lib1_sl $lib_opts] != ""} {
56 untested "could not build $lib1_sl."
58 } elseif { [gdb_compile_shlib $lib2src $lib2_sl $lib_opts] != ""} {
59 untested "could not build $lib1_s2."
61 } elseif { [gdb_compile $srcfile $binfile executable $exec_opts] != ""} {
62 untested "could not build $binfile."
66 # Start with a fresh gdb.
68 clean_restart $binfile
69 gdb_load_shlib $lib1_sl
70 gdb_load_shlib $lib2_sl
72 # Load up the shared objects
78 # Check debugging symbol relocations
81 # Check extern function for relocation
82 set fn_1_addr [get_var_address fn_1]
83 set fn_2_addr [get_var_address fn_2]
85 if { "${fn_1_addr}" == "${fn_2_addr}" } {
86 fail "relocated extern functions have different addresses"
88 pass "relocated extern functions have different addresses"
91 # Check extern var for relocation
92 set extern_var_1_addr [get_var_address extern_var_1]
93 set extern_var_2_addr [get_var_address extern_var_2]
95 if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } {
96 fail "relocated extern variables have different addresses"
98 pass "relocated extern variables have different addresses"
101 # Check static var for relocation
102 set static_var_1_addr [get_var_address static_var_1]
103 set static_var_2_addr [get_var_address static_var_2]
105 if { "${static_var_1_addr}" == "${static_var_2_addr}" } {
106 fail "relocated static variables have different addresses"
108 pass "relocated static variables have different addresses"
112 # Check minimal symbol relocations
115 proc send_gdb_discard { command } {
116 # Send a command to gdb and discard output up to the next prompt
121 gdb_test_multiple "${command}" "${command}" {
122 -re ".*\[\r\n]+${gdb_prompt} $" {
126 fail "{$command} (timeout)"
132 proc get_msym_addrs { var msymfile } {
133 # Extract the list of values for symbols matching var in the
134 # minimal symbol output file
136 global gdb_prompt hex
139 send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n"
143 -re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" {
144 set result [concat $result $expect_out(1,string)]
147 -re "$gdb_prompt $" {
148 pass "get_msym_addrs ${var}"
152 -re "\[^\r\n\]*\[\r\n\]+" {
157 fail "get_msym_addrs ${var} (timeout)"
164 proc check_same {var msymfile} {
165 # Check that the minimal symbol values matching var are the same
167 set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]]
176 proc check_different {var msymfile} {
177 # Check that the minimal symbol values matching var are different
179 set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]]
182 if { [llength ${addr_list}] < 2 } {
186 foreach addr ${addr_list} {
187 if { ${prev} == ${addr} } {
196 if [is_remote host] {
197 set msymfile shreloc.txt
199 set msymfile [standard_output_file shreloc.txt]
202 if [send_gdb_discard "maint print msymbols ${msymfile}"] {
203 if {[check_different "static_var_\[12\]" "${msymfile}"]} {
204 pass "(msymbol) relocated static vars have different addresses"
206 fail "(msymbol) relocated static vars have different addresses"
209 if {[check_different "extern_var_\[12\]" "${msymfile}"]} {
210 pass "(msymbol) relocated extern vars have different addresses"
212 fail "(msymbol) relocated extern vars have different addresses"
215 if {[check_different "fn_\[12\]" "${msymfile}"]} {
216 pass "(msymbol) relocated functions have different addresses"
218 fail "(msymbol) relocated functions have different addresses"
222 if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
224 # We know the names of some absolute symbols included in the
225 # portable-executable (DLL) format. Check that they didn't get
228 # A better approach would be include absolute symbols via the assembler.
230 if {[check_same "_minor_os_version__" "${msymfile}"]} {
231 pass "absolute symbols not relocated"
233 fail "absolute symbols not relocated"