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# Copyright (C) 2016-2021 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 3 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
# 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, see <>.
# This file is part of the gdb testsuite.
# Test manually setting _all_ combinations of all supported bfd
# architectures and OS ABIs. This ensures that gdbarch initialization
# routines handle unusual combinations gracefully, at least without
# crashing.
# While at it, because the number of possible combinations is quite
# large, embed other checks that might be useful to do with all
# supported archs.
# One such test is ensuring that printing float, double and long
# double types works in cross/bi-arch scenarios. Some of GDB's float
# format conversion routines used to fail to consider that even if
# host and target floating formats match, their sizes may still
# differ. E.g., on x86, long double is 80-bit extended precision on
# both 32-bit vs 64-bit, but it's stored as 96 bit on 32-bit, and 128
# bit on 64-bit. This resulted in GDB accessing memory out of bounds.
# This test catches the issue when run against gdb linked with
# libmcheck, or run under Valgrind.
# Note: this test is actually split in several driver .exp files, in
# order to be able to parallelize the work. Each driver .exp file
# exercises a different slice of the supported architectures. See
# all-architectures-*.exp and the TEST_SLICE variable.
# By default, preparation steps don't output a PASS message. This is
# because the testcase has several thousand such steps.
set want_tests_messages 0
# Call this when an "internal" preparation-like step test passed.
# Logs the pass in gdb.log, but not in gdb.sum.
proc internal_pass {message} {
global want_tests_messages
if {$want_tests_messages} {
pass $message
} else {
# Skip the sum file, but still log an internal pass in the log
# file.
global pf_prefix
verbose -log "IPASS: $pf_prefix $message"
# The number of times gdb_test_internal was called, and the number of
# time that resulted in an internal pass. If these don't match, then
# some test failed.
set test_count 0
set internal_pass_count 0
# Like gdb_test, but calls internal_pass instead of pass, on success.
proc gdb_test_internal {cmd pattern {message ""}} {
global test_count internal_pass_count
global gdb_prompt
incr test_count
if {$message == ""} {
set message $cmd
gdb_test_multiple $cmd $message {
-re "$pattern\r\n$gdb_prompt $" {
internal_pass $message
incr internal_pass_count
gdb_test_internal "set max-completions unlimited" \
"^set max-completions unlimited"
# Return a list of all the accepted values of "set WHAT".
proc get_set_option_choices {what} {
global gdb_prompt
set values {}
set test "complete set $what"
gdb_test_multiple "complete set $what " "$test" {
-re "set $what (\[^\r\n\]+)\r\n" {
lappend values $expect_out(1,string)
-re "$gdb_prompt " {
internal_pass $test
return $values
set supported_archs [get_set_option_choices "architecture"]
# There should be at least one more than "auto".
gdb_assert {[llength $supported_archs] > 1} "at least one architecture"
set supported_osabis [get_set_option_choices "osabi"]
# There should be at least one more than "auto" and "default".
gdb_assert {[llength $supported_osabis] > 2} "at least one osabi"
if {[lsearch $supported_archs "mips"] >= 0} {
set supported_mipsfpu [get_set_option_choices "mipsfpu"]
set supported_mips_abi [get_set_option_choices "mips abi"]
gdb_assert {[llength $supported_mipsfpu] != 0} "at least one mipsfpu"
gdb_assert {[llength $supported_mips_abi] != 0} "at least one mips abi"
if {[lsearch $supported_archs "arm"] >= 0} {
set supported_arm_fpu [get_set_option_choices "arm fpu"]
set supported_arm_abi [get_set_option_choices "arm abi"]
gdb_assert {[llength $supported_arm_fpu] != 0} "at least one arm fpu"
gdb_assert {[llength $supported_arm_abi] != 0} "at least one arm abi"
# Exercise printing float, double and long double.
proc print_floats {} {
gdb_test_internal "ptype 1.0L" "type = long double" "ptype, long double"
gdb_test_internal "print 1.0L" " = 1" "print, long double"
gdb_test_internal "ptype 1.0" "type = double" "ptype, double"
gdb_test_internal "print 1.0" " = 1" "print, double"
gdb_test_internal "ptype 1.0f" "type = float" "ptype, float"
gdb_test_internal "print 1.0f" " = 1" "print, float"
# Run tests on the current architecture.
proc do_arch_tests {} {
# GDB can't access memory because there is no loaded executable
# nor live inferior.
gdb_test_internal "disassemble 0x0,+4" \
"Cannot access memory at address 0x0"
# Given we can't change arch, osabi, endianness, etc. atomically, we
# need to silently ignore the case of the current OS ABI (not the one
# we'll switch to) not having a handler for the arch.
set osabi_warning \
[multi_line \
"warning: A handler for the OS ABI .* is not built into this configuration" \
"of GDB. Attempting to continue with the default .* settings." \
"" \
"" \
set endian_warning "(Little|Big) endian target not supported by GDB\r\n"
# Like gdb_test_no_output, but use internal_pass instead of pass, and
# ignore "no handler for OS ABI" warnings.
proc gdb_test_no_output_osabi {cmd test} {
global osabi_warning
global gdb_prompt
gdb_test_multiple "$cmd" $test {
-re "^${cmd}\r\n(${osabi_warning})?$gdb_prompt $" {
internal_pass $test
# It'd be nicer/safer to restart GDB on each iteration, but, that
# increases the testcase's run time several times fold. At the time
# of writting, it'd jump from 20s to 4min on x86-64 GNU/Linux with
# --enable-targets=all.
set num_slices 8
set num_archs [llength $supported_archs]
set archs_per_slice [expr (($num_archs + $num_slices - 1) / $num_slices)]
with_test_prefix "tests" {
foreach_with_prefix osabi $supported_osabis {
gdb_test_no_output_osabi "set osabi $osabi" \
"set osabi"
set arch_count 0
foreach_with_prefix arch $supported_archs {
incr arch_count
# Skip architectures outside our slice.
if {$arch_count < [expr $test_slice * $archs_per_slice]} {
if {$arch_count >= [expr ($test_slice + 1) * $archs_per_slice]} {
if {$arch == "auto"} {
set default_endian ""
foreach_with_prefix endian {"auto" "big" "little"} {
set test "set endian"
if {$endian == $default_endian} {
} elseif {$endian == "auto"} {
gdb_test_multiple "set endian $endian" $test {
-re "^set endian $endian\r\n(${osabi_warning})?The target endianness is set automatically \\(currently .* endian\\)\\.\r\n$gdb_prompt $" {
internal_pass $test
} else {
gdb_test_multiple "set endian $endian" $test {
-re "^set endian $endian\r\n${endian_warning}.*\r\n$gdb_prompt $" {
internal_pass $test
-re "^set endian $endian\r\n(${osabi_warning})?The target is set to $endian endian\\.\r\n$gdb_prompt $" {
internal_pass $test
# Skip setting the same architecture again.
if {$endian == "auto"} {
set arch_re [string_to_regexp $arch]
set test "set architecture $arch"
gdb_test_multiple $test $test {
-re "^set architecture $arch_re\r\n(${osabi_warning})?The target architecture is set to \"$arch_re\"\\.\r\n$gdb_prompt $" {
internal_pass $test
-re "Architecture .* not recognized.*$gdb_prompt $" {
# GDB is missing support for a few
# machines that bfd supports.
if {$arch == "powerpc:EC603e"
|| $arch == "powerpc:e500mc"
|| $arch == "powerpc:e500mc64"
|| $arch == "powerpc:vle"
|| $arch == "powerpc:titan"
|| $arch == "powerpc:e5500"
|| $arch == "powerpc:e6500"} {
if {$want_tests_messages} {
kfail $test "gdb/19797"
} else {
fail "$test (arch not recognized)"
# Record what is the default endianess. As an
# optimization, we'll skip testing the manual "set
# endian DEFAULT" case.
set test "show endian"
gdb_test_multiple "show endian" $test {
-re "currently little endian.*$gdb_prompt $" {
set default_endian "little"
internal_pass $test
-re "currently big endian.*$gdb_prompt $" {
set default_endian "big"
internal_pass $test
# Some architectures have extra settings that affect
# the ABI. Specify the extra testing axes in a
# declarative form.
# A list of {COMMAND, VAR, OPTIONS-LIST} elements.
set all_axes {}
if {$arch == "mips"} {
lappend all_axes [list "set mips abi" mips_abi $supported_mips_abi]
lappend all_axes [list "set mipsfpu" mipsfpu $supported_mipsfpu]
} elseif {$arch == "arm"} {
lappend all_axes [list "set arm abi" arm_abi $supported_arm_abi]
lappend all_axes [list "set arm fpu" arm_fpu $supported_arm_fpu]
# Run testing axis CUR_AXIS. This is a recursive
# procedure that tries all combinations of options of
# all the testing axes.
proc run_axis {all_axes cur_axis} {
if {$cur_axis == [llength $all_axes]} {
# Unpack the axis.
set axis [lindex $all_axes $cur_axis]
set cmd [lindex $axis 0]
set var [lindex $axis 1]
set options [lindex $axis 2]
foreach v $options {
with_test_prefix "$var=$v" {
gdb_test_no_output_osabi "$cmd $v" "$cmd"
run_axis $all_axes [expr $cur_axis + 1]
run_axis $all_axes 0
# A test that:
# - ensures there's a PASS if all internal tests actually passed
# - ensures there's at least one test that is interpreted as a
# regression (a matching PASS->FAIL) if some of the internal tests
# failed, instead of looking like it could be a new FAIL that could
# be ignored.
gdb_assert {$internal_pass_count == $test_count} "all passed"