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# Copyright 2012-2025 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
# 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, see <http://www.gnu.org/licenses/>.
#
# Compile a 32-bit x86 executable and then stop within a system call.
# Change the sysroot to a non-existent directory, GDB should try (and
# fail) to reload the currently loaded shared libraries. However, GDB
# should retain the symbols for the vDSO library as that is not loaded
# from the file system.
#
# Check the backtrace to ensure that the __kernel_vsyscall symbol is
# still in the backtrace, this indicates GDB still has the vDSO
# symbols available.
require {is_any_target "i?86-*-linux*" "x86_64-*-linux*"}
standard_testfile
# The binary must be compiled as 32-bit so that the system call
# `__kernel_vsyscall' originates from vDSO.
set flags { debug }
if { ![is_ilp32_target] } {
lappend flags "additional_flags=-m32"
}
if { [prepare_for_testing $testfile.exp $testfile $srcfile $flags] } {
return
}
if { ![runto_main] } {
return
}
set non_existing_directory [standard_output_file "BOGUS"]
gdb_test "continue" "Program received signal SIGABRT, Aborted.*" \
"continue until abort"
gdb_test "set sysroot $non_existing_directory" \
".*warning: Unable to find dynamic linker breakpoint function.*" \
"set sysroot"
gdb_test "bt" "__kernel_vsyscall.*" "backtrace with __kernel_vsyscall"
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