forked from Imagelibrary/binutils-gdb
ec48903170
Add a new testcase for exercising attaching to a process after its main thread has exited. This is not possible on Linux, the kernel does not allow attaching to a zombie task, so the test is kfailed there. It is possible however on Windows at least, and was the scenario addressed by the Windows backend fix in https://sourceware.org/legacy-ml/gdb-patches/2003-12/msg00479.html, nowadays PR threads/8153, back in 2003. Passes cleanly on Cygwin. KFAILed on GNU/Linux native and gdbserver. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=8153 Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31554 Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31555 Change-Id: Ib554f92f68c965bb4603cdf2aadb55ca45ded53b
88 lines
2.7 KiB
Plaintext
88 lines
2.7 KiB
Plaintext
# Copyright (C) 2024 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test attaching to a program after its main thread has exited.
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require can_spawn_for_attach
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standard_testfile leader-exit.c
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if {[build_executable "failed to prepare" $testfile $srcfile {debug pthreads}] == -1} {
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return
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}
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set escapedbinfile [string_to_regexp ${binfile}]
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set test_spawn_id [spawn_wait_for_attach $binfile]
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set testpid [spawn_id_get_pid $test_spawn_id]
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# Wait a bit for the leader thread to exit, before attaching.
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sleep 2
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clean_restart ${binfile}
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# Save this early as we may not be able to talk with GDBserver anymore
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# when we need to check it.
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set is_gdbserver [target_is_gdbserver]
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# True if successfully attached.
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set attached 0
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gdb_test_multiple "attach $testpid" "attach" {
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-re "Attaching to process $testpid failed.*" {
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# GNU/Linux gdbserver. Linux ptrace does not let you attach
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# to zombie threads.
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setup_kfail "gdb/31555" *-*-linux*
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fail $gdb_test_name
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}
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-re "warning: process $testpid is a zombie - the process has already terminated.*" {
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# Native GNU/Linux. Linux ptrace does not let you attach to
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# zombie threads.
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setup_kfail "gdb/31555" *-*-linux*
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fail $gdb_test_name
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}
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-re "Attaching to program: $escapedbinfile, process $testpid.*$gdb_prompt $" {
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pass $gdb_test_name
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set attached 1
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}
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}
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# With gdbserver, after we failed to attach, we hit PR server/31554:
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# print $_inferior_thread_count
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# Remote connection closed
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# (gdb) KFAIL: gdb.threads/leader-exit-attach.exp: get valueof "$_inferior_thread_count"
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if {!$attached && $is_gdbserver} {
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setup_kfail "server/31554" "*-*-*"
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}
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set thread_count [get_valueof "" "\$_inferior_thread_count" -1]
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if {$thread_count == -1} {
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kill_wait_spawned_process $test_spawn_id
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return
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}
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if {$attached} {
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# Check that we have at least one thread. We can't assume there
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# will only be exactly one thread, because on some systems, like
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# Cygwin, the runtime spawns extra threads. Also, on Windows,
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# attaching always injects one extra thread.
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gdb_assert {$thread_count >= 1}
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} else {
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gdb_assert {$thread_count == 0}
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}
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kill_wait_spawned_process $test_spawn_id
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