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# Copyright 2007-2021 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 <>.
# Please email any bugs, comments, and/or additions to this file to:
# This file is part of the gdb testsuite.
# Unwinding of DW_CFA_GNU_negative_offset_extended test program.
# Test i386 unwinder.
if { ![is_x86_like_target] } then {
verbose "Skipping i386 unwinder tests."
set testfile "i386-gnu-cfi"
set srcfilec ${testfile}.c
set srcfileasm ${testfile}-asm.S
set binfile [standard_output_file ${testfile}]
# some targets have leading underscores on assembly symbols.
set additional_flags [gdb_target_symbol_prefix_flags]
if { [gdb_compile "${srcdir}/${subdir}/${srcfilec} ${srcdir}/${subdir}/${srcfileasm}" "${binfile}" executable [list debug $additional_flags]] != "" } {
untested "failed to compile"
return -1
# Get things started.
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
# We should stop in abort(3).
gdb_test_multiple {} "continue to abort()" {
-re ".*Program received signal SIGABRT,.*$gdb_prompt $" {
pass "continue to abort()"
# Verify that the backtrace works (it would crash before). Use the backtrace
# output to find the frame number for function "gate".
set gate_n ""
set backtrace_re \
[multi_line \
"" \
"#($decimal) *$hex in gate \[^\r\n\]*" \
"#$decimal *$hex in main \\(\\) at .*${testfile}.c.*"]
gdb_test_multiple "backtrace" "" {
-re -wrap $backtrace_re {
set gate_n $expect_out(1,string)
pass $gdb_test_name
if { $gate_n == "" } {
return -1
# Check we see the inserted `DW_CFA_GNU_negative_offset_extended' CFI.
# We see there the original CFI-stored filename `gate.c'.
gdb_test "frame $gate_n" \
"gate \\(\[^()\]*\\) at .*gate.c.*" \
"shift up to the modified frame"
gdb_test_multiple "info frame" "existence of the CFI inserted register" {
-re "Stack level $gate_n, frame at (0x\[0-9a-f\]+):.*Saved registers:.* ecx at (0x\[0-9a-f\]+),.*" {
pass "existence of the CFI inserted register"
if { [string compare $expect_out(1,string) $expect_out(2,string)] } then {
fail "value of the CFI inserted register"
} else {
pass "value of the CFI inserted register"