# Copyright 2024 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/>.

# Ensure that when we attach to an i386 process, which is stopped in
# the vDSO, we are able to get symbols for the vDSO region.

require {is_any_target "i?86-*-linux*" "x86_64-*-linux*"}
require can_spawn_for_attach

standard_testfile

set options {debug}
if {![istarget "i386-*-*"]} {
    lappend options "additional_flags=-m32"
}

# The kernel VDSO is used for the syscalls returns only on i386 (not x86_64).
if { [build_executable "failed to prepare" $testfile $srcfile $options] } {
    return -1
}

# Don't tell GDB which executable we're debugging.
clean_restart

# Start the test program ready for GDB to attach to it.
set test_spawn_id [spawn_wait_for_attach $binfile]
set testpid [spawn_id_get_pid $test_spawn_id]

# Attach GDB to the process.
gdb_test_multiple "attach $testpid" "attach to test process" {
    -re -wrap "Attaching to process $testpid.*" {
	pass $gdb_test_name
    }
}

# The inferior will be stopped within the vDSO, check we get symbols
# for this address.
gdb_test "bt" "#0 *0x\[0-9a-f\]* in \[^?\]+\r\n#1\\s+.*" \
    "backtrace decodes VDSO"

# Exit GDB and the spawned process.
gdb_exit
kill_wait_spawned_process $test_spawn_id