Bug 31166

Summary:	[gdb/testsuite] FAIL: gdb.base/vfork-follow-parent.exp: resolution_method=schedule-multiple: inferior 1 (timeout)
Product:	gdb	Reporter:	Tom de Vries <vries>
Component:	testsuite	Assignee:	Not yet assigned to anyone <unassigned>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	P2
Version:	HEAD
Target Milestone:	15.1
Host:		Target:
Build:		Last reconfirmed:
Project(s) to access:		ssh public key:

Description Tom de Vries 2023-12-14 08:52:09 UTC

With a 13.2 based package I run into:
...
(gdb) PASS: gdb.base/vfork-follow-parent.exp: resolution_method=schedule-multiple: continue to end of inferior 2
inferior 1^M
[Switching to inferior 1 [process 24968] (/home/abuild/rpmbuild/BUILD/gdb-13.2/build-x86_64-suse-linux/gdb/testsuite.unix.-m64.-fno-PIE.-no-pie/outputs/gdb.base/vfork-follow-parent/vfork-follow-parent)]^M
[Switching to thread 1.1 (Thread 0x7ffff7fbbb80 (LWP 24968))]^M
#0  0x00007ffff7cda937 in clock_nanosleep@GLIBC_2.2.5 () from /lib64/libc.so.6^M
(gdb) Reading symbols from /home/abuild/rpmbuild/BUILD/gdb-13.2/build-x86_64-suse-linux/gdb/testsuite.unix.-m64.-fno-PIE.-no-pie/outputs/gdb.base/vfork-follow-parent/vfork-follow-parent...^M
FAIL: gdb.base/vfork-follow-parent.exp: resolution_method=schedule-multiple: inferior 1 (timeout)
...

I suppose this could be fixed by using -no-prompt-anchor on:
...
        gdb_test "inferior 1" ".*Switching to inferior 1.*"
...

I have not been able to reproduce this outside of OBS yet.

Comment 1 Tom de Vries 2024-01-08 10:47:47 UTC

(In reply to Tom de Vries from comment #0)
> I have not been able to reproduce this outside of OBS yet.

Managed to reproduce using taskset -c 0:
...
FAIL: gdb.base/vfork-follow-parent.exp: exec_file=vfork-follow-parent-exit: target-non-stop=on: non-stop=off: resolution_method=schedule-multiple: inferior 1 (timeout)
FAIL: gdb.base/vfork-follow-parent.exp: exec_file=vfork-follow-parent-exit: target-non-stop=off: non-stop=off: resolution_method=schedule-multiple: inferior 1 (timeout)
...

Comment 2 Sourceware Commits 2024-01-08 12:01:24 UTC

The master branch has been updated by Tom de Vries <vries@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6ccc6caf4906036f8d5778fd5a412a199621745e

commit 6ccc6caf4906036f8d5778fd5a412a199621745e
Author: Tom de Vries <tdevries@suse.de>
Date:   Mon Jan 8 13:01:50 2024 +0100

    [gdb/testsuite] Add missing -no-prompt-anchor in gdb.base/vfork-follow-parent.exp
    
    When running test-case gdb.base/vfork-follow-parent.exp it passes fine, but
    when running it with "taskset -c 0" I run into:
    ...
    (gdb) inferior 1^M
    [Switching to inferior 1 [process 26606] (vfork-follow-parent-exit)]^M
    [Switching to thread 1.1 (process 26606)]^M
    (gdb) Reading symbols from vfork-follow-parent-exit...^M
    FAIL: $exp: exec_file=vfork-follow-parent-exit: target-non-stop=on: \
      non-stop=off: resolution_method=schedule-multiple: inferior 1 (timeout)
    ...
    
    Fix this by using -no-prompt-anchor.
    
    Tested on x86_64-linux.
    
    PR testsuite/31166
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31166

Comment 3 Tom de Vries 2024-01-08 12:02:20 UTC

Fixed.