28e7fd6234
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
264 lines
6.7 KiB
Text
264 lines
6.7 KiB
Text
# Copyright (C) 2003-2013 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Tests for shared object file relocation. If two shared objects have
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# the same load address (actually, overlapping load spaces), one of
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# them gets relocated at load-time. Check that gdb gets the right
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# values for the debugging and minimal symbols.
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if {[skip_shlib_tests]} {
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return 0
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}
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#
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# This file uses shreloc.c, shreloc1.c and shreloc2.c
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#
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set workdir ${objdir}/${subdir}
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set testfile "shreloc"
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set libfile1 "shreloc1"
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set libfile2 "shreloc2"
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set srcfile $srcdir/$subdir/$testfile.c
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set lib1src $srcdir/$subdir/$libfile1.c
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set lib2src $srcdir/$subdir/$libfile2.c
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set binfile $objdir/$subdir/$testfile
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set lib1_sl $objdir/$subdir/$libfile1.sl
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set lib2_sl $objdir/$subdir/$libfile2.sl
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if [get_compiler_info] {
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return -1
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}
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set lib_opts "debug"
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set exec_opts [list debug shlib=$lib1_sl shlib=$lib2_sl]
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if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
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lappend lib_opts "ldflags=-Wl,--image-base,0x04000000"
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}
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if [test_compiler_info "xlc-*"] {
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# IBM's xlc compiler does not add static variables to the ELF symbol
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# table by default. We need this option to make the variables show
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# up in "maint print msymbols".
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lappend lib_opts "additional_flags=-qstatsym"
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}
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if { [gdb_compile_shlib $lib1src $lib1_sl $lib_opts] != ""} {
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untested "Could not build $lib1_sl."
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return -1
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} elseif { [gdb_compile_shlib $lib2src $lib2_sl $lib_opts] != ""} {
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untested "Could not build $lib1_s2."
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return -1
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} elseif { [gdb_compile $srcfile $binfile executable $exec_opts] != ""} {
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untested "Could not build $binfile."
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return -1
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}
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# Start with a fresh gdb.
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${workdir}/shreloc
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gdb_load_shlibs $lib1_sl $lib2_sl
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# Load up the shared objects
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if ![runto_main] then {
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fail "Can't run to main"
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return 0
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}
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proc get_var_address { var } {
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global gdb_prompt hex
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# Match output like:
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# $1 = (int *) 0x0
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# $5 = (int (*)()) 0
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# $6 = (int (*)()) 0x24 <function_bar>
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gdb_test_multiple "print &${var}" "get address of ${var}" {
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-re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $"
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{
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pass "get address of ${var}"
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if { $expect_out(1,string) == "0" } {
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return "0x0"
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} else {
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return $expect_out(1,string)
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}
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}
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}
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return ""
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}
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#
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# Check debugging symbol relocations
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#
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# Check extern function for relocation
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set fn_1_addr [get_var_address fn_1]
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set fn_2_addr [get_var_address fn_2]
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if { "${fn_1_addr}" == "${fn_2_addr}" } {
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fail "relocated extern functions have different addresses"
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} else {
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pass "relocated extern functions have different addresses"
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}
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# Check extern var for relocation
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set extern_var_1_addr [get_var_address extern_var_1]
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set extern_var_2_addr [get_var_address extern_var_2]
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if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } {
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fail "relocated extern variables have different addresses"
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} else {
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pass "relocated extern variables have different addresses"
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}
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# Check static var for relocation
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set static_var_1_addr [get_var_address static_var_1]
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set static_var_2_addr [get_var_address static_var_2]
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if { "${static_var_1_addr}" == "${static_var_2_addr}" } {
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fail "relocated static variables have different addresses"
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} else {
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pass "relocated static variables have different addresses"
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}
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#
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# Check minimal symbol relocations
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#
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proc send_gdb_discard { command } {
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# Send a command to gdb and discard output up to the next prompt
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global gdb_prompt
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# Discard output
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gdb_test_multiple "${command}" "${command}" {
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-re ".*\[\r\n]+${gdb_prompt} $" {
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return 1
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}
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timeout {
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fail "{$command} (timeout)"
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return 0
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}
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}
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}
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proc get_msym_addrs { var msymfile } {
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# Extract the list of values for symbols matching var in the
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# minimal symbol output file
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global gdb_prompt hex
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set result ""
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send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n"
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while 1 {
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gdb_expect {
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-re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" {
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set result [concat $result $expect_out(1,string)]
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}
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-re "$gdb_prompt $" {
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pass "get_msym_addrs ${var}"
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return "${result}"
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}
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-re "\[^\r\n\]*\[\r\n\]+" {
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# Skip
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}
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timeout {
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fail "get_msym_addrs ${var} (timeout)"
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return -1
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}
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}
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}
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}
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proc check_same {var msymfile} {
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# Check that the minimal symbol values matching var are the same
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set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]]
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if { $len == 1 } {
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return 1
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} else {
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return 0
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}
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}
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proc check_different {var msymfile} {
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# Check that the minimal symbol values matching var are different
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set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]]
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set prev ""
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if { [llength ${addr_list}] < 2 } {
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return 0
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}
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foreach addr ${addr_list} {
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if { ${prev} == ${addr} } {
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return 0
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}
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set prev ${addr}
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}
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return 1
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}
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set msymfile "${workdir}/shreloc.txt"
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if [send_gdb_discard "maint print msymbols ${msymfile}"] {
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if {[check_different "static_var_\[12\]" "${msymfile}"]} {
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pass "(msymbol) relocated static vars have different addresses"
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} else {
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fail "(msymbol) relocated static vars have different addresses"
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}
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if {[check_different "extern_var_\[12\]" "${msymfile}"]} {
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pass "(msymbol) relocated extern vars have different addresses"
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} else {
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fail "(msymbol) relocated extern vars have different addresses"
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}
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if {[check_different "fn_\[12\]" "${msymfile}"]} {
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pass "(msymbol) relocated functions have different addresses"
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} else {
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fail "(msymbol) relocated functions have different addresses"
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}
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}
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if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
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#
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# We know the names of some absolute symbols included in the
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# portable-executable (DLL) format. Check that they didn't get
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# relocated.
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#
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# A better approach would be include absolute symbols via the assembler.
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#
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if {[check_same "_minor_os_version__" "${msymfile}"]} {
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pass "Absolute symbols not relocated"
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} else {
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fail "Absolute symbols not relocated"
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}
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}
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