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# Copyright (C) 2003 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu
# Tests for shared object file relocation. If two shared objects have
# the same load address (actually, overlapping load spaces), one of
# them gets relocated at load-time. Check that gdb gets the right
# values for the debugging and minimal symbols.
if {[istarget *-elf*] || [istarget *-coff] || [istarget *-aout]} then {
verbose "test skipped - shared object files not supported by this target."
return 0
}
if $tracelevel then {
strace $tracelevel
}
#
# This file uses shreloc.c, shreloc1.c and shreloc2.c
#
set prms_id 0
set bug_id 0
set workdir ${objdir}/${subdir}
foreach module [list "shreloc" "shreloc1" "shreloc2"] {
if {[gdb_compile "${srcdir}/${subdir}/${module}.c" "${workdir}/${module}.o" object {debug}] != ""} {
untested "Couldn't compile ${module}.c"
return -1
}
}
set additional_flags "additional_flags=-shared"
if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
set additional_flags "${additional_flags} -Wl,--image-base,0x04000000"
}
foreach module [list "shreloc1" "shreloc2"] {
if {[gdb_compile "${workdir}/${module}.o" "${workdir}/${module}.dll" executable [list debug $additional_flags]] != ""} {
untested "Couldn't link ${module}.dll"
return -1
}
}
if {[gdb_compile [list "${workdir}/shreloc.o" "${workdir}/shreloc1.dll" "${workdir}/shreloc2.dll"] "${workdir}/shreloc" executable debug] != ""} {
untested "Couldn't link shreloc executable"
return -1
}
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${workdir}/shreloc
# Load up the shared objects
if ![runto_main] then {
fail "Can't run to main"
return 0
}
proc get_var_address { var } {
global gdb_prompt hex
send_gdb "print &${var}\n"
# Match output like:
# $1 = (int *) 0x0
# $5 = (int (*)()) 0
# $6 = (int (*)()) 0x24 <function_bar>
gdb_expect {
-re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $"
{
pass "get address of ${var}"
if { $expect_out(1,string) == "0" } {
return "0x0"
} else {
return $expect_out(1,string)
}
}
-re "${gdb_prompt} $"
{ fail "get address of ${var} (unknown output)" }
timeout
{ fail "get address of ${var} (timeout)" }
}
return ""
}
#
# Check debugging symbol relocations
#
# Check extern function for relocation
set fn_1_addr [get_var_address fn_1]
set fn_2_addr [get_var_address fn_2]
if { "${fn_1_addr}" == "${fn_2_addr}" } {
fail "relocated extern functions have different addresses"
} else {
pass "relocated extern functions have different addresses"
}
# Check extern var for relocation
set extern_var_1_addr [get_var_address extern_var_1]
set extern_var_2_addr [get_var_address extern_var_2]
if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } {
fail "relocated extern variables have different addresses"
} else {
pass "relocated extern variables have different addresses"
}
# Check static var for relocation
set static_var_1_addr [get_var_address static_var_1]
set static_var_2_addr [get_var_address static_var_2]
if { "${static_var_1_addr}" == "${static_var_2_addr}" } {
fail "relocated static variables have different addresses"
} else {
pass "relocated static variables have different addresses"
}
#
# Check minimal symbol relocations
#
proc send_gdb_discard { command } {
# Send a command to gdb and discard output up to the next prompt
global gdb_prompt
send_gdb "${command}\n"
# Discard output
gdb_expect {
-re ".*\[\r\n]+${gdb_prompt} $" {
return 1
}
timeout {
fail "{$command} (timeout)"
return 0
}
}
}
proc get_msym_addrs { var msymfile } {
# Extract the list of values for symbols matching var in the
# minimal symbol output file
global gdb_prompt hex
set result ""
send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n"
while 1 {
gdb_expect {
-re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" {
set result [concat $result $expect_out(1,string)]
}
-re "$gdb_prompt $" {
pass "get_msym_addrs ${var} (${result})"
return "${result}"
}
-re "\[^\r\n\]*\[\r\n\]+" {
# Skip
}
timeout {
fail "get_msym_addrs ${var} (timeout)"
return -1
}
}
}
}
proc check_same {var msymfile} {
# Check that the minimal symbol values matching var are the same
set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]]
if { $len == 1 } {
return 1
} else {
return 0
}
}
proc check_different {var msymfile} {
# Check that the minimal symbol values matching var are different
set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]]
set prev ""
if { [llength ${addr_list}] < 2 } {
return 0
}
foreach addr ${addr_list} {
if { ${prev} == ${addr} } {
return 0
}
set prev ${addr}
}
return 1
}
set msymfile "${workdir}/shreloc.txt"
if [send_gdb_discard "maint print msymbols ${msymfile}"] {
if {[check_different "static_var_\[12\]" "${msymfile}"]} {
pass "(msymbol) relocated static vars have different addresses"
} else {
fail "(msymbol) relocated static vars have different addresses"
}
if {[check_different "extern_var_\[12\]" "${msymfile}"]} {
pass "(msymbol) relocated extern vars have different addresses"
} else {
fail "(msymbol) relocated extern vars have different addresses"
}
if {[check_different "fn_\[12\]" "${msymfile}"]} {
pass "(msymbol) relocated functions have different addresses"
} else {
fail "(msymbol) relocated functions have different addresses"
}
}
if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } {
#
# We know the names of some absolute symbols included in the
# portable-executable (DLL) format. Check that they didn't get
# relocated.
#
# A better approach would be include absolute symbols via the assembler.
#
if {[check_same "_minor_os_version__" "${msymfile}"]} {
pass "Absolute symbols not relocated"
} else {
fail "Absolute symbols not relocated"
}
}
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