[Bug gdb/30240] New: (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[Bug gdb/30240] New: (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[dmitry.neverov at jetbrains dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

            Bug ID: 30240
           Summary: (linux/aarch) thread.c:86: internal-error:
                    inferior_thread: Assertion `current_thread_ !=
                    nullptr' failed.
           Product: gdb
           Version: HEAD
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: dmitry.neverov at jetbrains dot com
  Target Milestone: ---

Created attachment 14755
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14755&action=edit
gdb.output

Cannot debug simple hello world with gdb 13.1 or gdb built on commit
bf8d2f92356768d329430c08dc81025243db636d (note that it includes the last commit
fixing https://sourceware.org/bugzilla/show_bug.cgi?id=26761). Gdb 12.1 which
comes with ubuntu 22.04 works fine. If that matters, it happens on ubuntu
installed in parallels on mac.

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at sourceware dot org   |luis.machado at arm dot com
     Ever confirmed|0                           |1
                 CC|                            |luis.machado at arm dot com,
                   |                            |simark at simark dot ca
   Last reconfirmed|                            |2023-03-17

--- Comment #1 from Simon Marchi <simark at simark dot ca> ---
I think this is being addressed here:

https://inbox.sourceware.org/gdb-patches/20230316103904.1947447-1-luis.machado@arm.com/

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

--- Comment #2 from Luis Machado <luis.machado at arm dot com> ---
Just to confirm, does the target machine support Pointer Authentication? When
you say mac, is this M2-based?

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

--- Comment #3 from Luis Machado <luis.machado at arm dot com> ---
For the record, I've seen this particular internal error happening in other
cases, so it may not be exactly the issue with pauth handling for the aarch64
backend, hence why I wanted to confirm.

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[dmitry.neverov at jetbrains dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

--- Comment #4 from Dmitry Neverov <dmitry.neverov at jetbrains dot com> ---
I use Apple M1 Max. According to [1], Pointer Authentication is disabled by
default and I didn't enable it. The document says it should work inside a linux
VM anyway. Disasm for main or _start doesn't contain any pacio/autia
instructions.

[1]:
https://github.com/lelegard/arm-cpusysregs/blob/main/docs/arm64e-on-macos.md

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

--- Comment #5 from Luis Machado <luis.machado at arm dot com> ---
Thanks for the info. For the pauth-related problem, a fix is under review and
should hopefully make its way to master and gdb 13 soon.

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

Luis Machado <luis.machado at arm dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING

--- Comment #6 from Luis Machado <luis.machado at arm dot com> ---
I've pushed a fix to gdb master and gdb 13 for the pauth issue. Could you
please verify it works now (if this is the bug you were hitting).

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[dmitry.neverov at jetbrains dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

--- Comment #7 from Dmitry Neverov <dmitry.neverov at jetbrains dot com> ---
Tried the commit 6967633c8b4902a7576e64c4ecf2ab6098c888f0, and it works! Thank
you!

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

Luis Machado <luis.machado at arm dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|WAITING                     |RESOLVED

--- Comment #8 from Luis Machado <luis.machado at arm dot com> ---
Great. I'm closing this one then. Please let us know if you see something off.

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[Bug gdb/30240] (linux/aarch) thread.c:86: internal-error: inferior_thread: Assertion `current_thread_ != nullptr' failed.

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30240

Joel Brobecker <brobecker at gnat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.2
                 CC|                            |brobecker at gnat dot com

--- Comment #9 from Joel Brobecker <brobecker at gnat dot com> ---
Setting the target milestone to 13.2 as a way to record that this fix was
included in the upcoming GDB 13.2 release.

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