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# Copyright (C) 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/>.
# Attach to a process, the executable for which has been deleted. On
# GNU/Linux GDB will spot the missing executable and fallback to use
# /proc/PID/exe instead.
require can_spawn_for_attach
require {istarget *-linux*}
standard_testfile
if { [build_executable "failed to prepare" $testfile $srcfile] } {
return -1
}
set test_spawn_id [spawn_wait_for_attach $binfile]
set testpid [spawn_id_get_pid $test_spawn_id]
# Move the executable rather than deleting it. This just to aid with
# debugging if someone needs to reproduce this test.
set binfile_moved ${binfile}_moved
# Don't move BINFILE as the kernel will just assign a new name to the
# same inode; and the /proc/PID/exe link will continue to point to the
# renamed inode.
remote_exec host "cp $binfile $binfile_moved"
remote_exec host "rm $binfile"
# Don't pass the executable when GDB starts. Instead rely on GDB
# finding the executable from the PID we attach too.
clean_restart
# Attach. GDB should spot that the executable is gone and fallback to
# use /proc/PID/exe.
set test "attach to process with deleted executable"
set re \
[multi_line \
"Attaching to process $decimal" \
"Reading symbols from (\[^\r\n\]+)[string_to_regexp ...]" \
".*"]
set filename ""
gdb_test_multiple "attach $testpid" $test {
-re -wrap $re {
set filename $expect_out(1,string)
pass $gdb_test_name
}
}
set test "filename /proc/PID/exe"
set re_nfs \[^\r\n\]+[string_to_regexp /.nfs]\[^\r\n\]+
if { [regexp $re_nfs $filename] } {
unsupported $test
} else {
gdb_assert { [string equal $filename /proc/${testpid}/exe] } $test
}
# Cleanup.
kill_wait_spawned_process $test_spawn_id
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