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From: "grazfather at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug remote/31303] New: attach calls python hooks which can crash
 gdb
Date: Sun, 28 Jan 2024 00:51:11 +0000
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X-Bugzilla-Product: gdb
X-Bugzilla-Component: remote
X-Bugzilla-Version: 13.1
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: grazfather at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31303

            Bug ID: 31303
           Summary: attach calls python hooks which can crash gdb
           Product: gdb
           Version: 13.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: remote
          Assignee: unassigned at sourceware dot org
          Reporter: grazfather at gmail dot com
  Target Milestone: ---

Created attachment 15337
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D15337&action=3Ded=
it
stacktrace

On GDB 13.2, when debugging a target using `target extended-remote` with a
continue hook setup which tries to get the selected frame, when I `attach 1=
`,
this hook is called and gdb crashes with a failed assertion.

../../gdb/thread.c:85: internal-error: inferior_thread: Assertion
`current_thread_ !=3D nullptr' failed.
A problem internal to GDB has been detected,

This hook does not seem to be called when I attach to a local process (by p=
id).

Stack trace is attached.

I reproduce with a blackmagic probe connected to a tty.

.gdbinit:

source hook_continue.py
target extended-remote /dev/cu.usbmodel72AE15F41
monitor tpwr enable
monitor swdp_scan
attach 1

hook_continue.py:

def f(_):
    gdb.selected_frame()
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
                                                    gdb.events.cont.connect=
(f)

--=20
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