From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1B3463858426; Tue, 31 Oct 2023 08:29:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1B3463858426 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1698740943; bh=IC7NA3qw6rdxx7Zior1MI095j15G8PMQ+NBEsW3ONfA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=nmP1hJdyv14vr1WaLjdPs0qByuPp02KwmucGpyF7V6hwNzz8MDQsxRrEdPN+LmOb1 vdVLTKOzJ/aLjYaLnQWCPgNvYN0fDfZf4Cn0I+6cnhgSdqn2sGU8gQ8LAm1lTIiirZ mwIRHp43mmdfVOxw43mrcY3sxJZTs625vi8OJesU= From: "vries at gcc dot gnu.org" To: gdb-prs@sourceware.org Subject: [Bug gdb/30547] [gdb, s390x, ppc64] segfault in for_each_block Date: Tue, 31 Oct 2023 08:28:58 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gdb X-Bugzilla-Component: gdb X-Bugzilla-Version: 13.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: vries at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://sourceware.org/bugzilla/show_bug.cgi?id=3D30547 --- Comment #2 from Tom de Vries --- Reproduces (100% sofar, but not always at the same point) for me with: ... gdb -q -batch -x ./build/gdb/testsuite/outputs/gdb.base/vfork-follow-parent/gdb.in.2 ... Adding debug prints in target-dcache.c: ... fprintf (stderr, "set (%p): %p\n", current_program_space->aspace, dcache); ... fprintf (stderr, "get (%p): %p\n", current_program_space->aspace, res); ... gives us: ... $ gdb -q -batch -x ./build/gdb/testsuite/outputs/gdb.base/vfork-follow-parent/gdb.in.2=20 No breakpoints or watchpoints. Breakpoint 1 at 0x100007e4: file /home/vries/gdb/src/gdb/testsuite/gdb.base/vfork-follow-parent.c, line 34. get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) get (0x1000ae22f50): (nil) set (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 Breakpoint 1, main (argc=3D1, argv=3D0x3ffffffff388) at /home/vries/gdb/src/gdb/testsuite/gdb.base/vfork-follow-parent.c:34 34 alarm (30); No breakpoints or watchpoints. Breakpoint 2 at 0x100007ac: file /home/vries/gdb/src/gdb/testsuite/gdb.base/vfork-follow-parent.c, line 29. get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 Can not resume the parent process over vfork in the foreground while holding the child stopped. Try "set detach-on-fork" or "set schedule-multiple". get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 0x00003fffb7d4f778 in .__vfork () from /lib64/libc.so.6 Can not resume the parent process over vfork in the foreground while holding the child stopped. Try "set detach-on-fork" or "set schedule-multiple". 0x00003fffb7d4f778 in .__vfork () from /lib64/libc.so.6 [New inferior 2 (process 62858)] get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 [Inferior 2 (process 62858) exited normally] [Switching to inferior 1 [process 62856] (/home/vries/gdb/build/gdb/testsuite/outputs/gdb.base/vfork-follow-parent/v= fork-follow-parent-exit)] [Switching to thread 1.1 (process 62856)] #0 0x00003fffb7d4f778 in .__vfork () from /lib64/libc.so.6 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 $1 =3D 1 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 get (0x1000ae22f50): 0x1000b15fbe0 Reading symbols from /home/vries/gdb/build/gdb/testsuite/outputs/gdb.base/vfork-follow-parent/vf= ork-follow-parent-exit... get (0x1000ae22f50): 0x785f77616b650000 Fatal signal: Segmentation fault ... --=20 You are receiving this mail because: You are on the CC list for the bug.=