[Bug gdb/26284] New: [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[Bug gdb/26284] New: [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

            Bug ID: 26284
           Summary: [arm] infrun.c:5312: internal-error: int
                    finish_step_over(execution_control_state*): Assertion
                    `ecs->event_thread->control.trap_expected' failed
           Product: gdb
           Version: 9.1
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

...
(gdb) PASS: gdb.base/step-over-syscall.exp: clone: displaced=off: set
displaced-stepping off
stepi^M
[New LWP 32249]^M
../../gdb/infrun.c:5312: internal-error: int
finish_step_over(execution_control_state*): Assertion
`ecs->event_thread->control.trap_expected' failed.^M
A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
Quit this debugging session? (y or n) FAIL: gdb.base/step-over-syscall.exp:
clone: displaced=off: single step over clone (GDB internal error)
Resyncing due to internal error.
...

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |armv7hl

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rearnsha at arm dot com

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
   Target Milestone|---                         |10.1
         Resolution|---                         |FIXED

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Can't reproduce this with current trunk, I'm not really sure due to which
commit, so tentatively marking this resolved-fixed.

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |luis.machado at linaro dot org
         Resolution|FIXED                       |---
     Ever confirmed|1                           |0
            Version|9.1                         |HEAD
   Target Milestone|10.1                        |---
             Status|RESOLVED                    |UNCONFIRMED

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #1)
> Can't reproduce this with current trunk, I'm not really sure due to which
> commit, so tentatively marking this resolved-fixed.

Spotted again with latest snapshot, reopening.

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #2)
> Spotted again with latest snapshot, reopening.

FTR, on openSUSE Leap 15.1, on open build service.

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
This may be a duplicate of a couple of PRs:
- PR21497 "FreeBSD: infrun.c:5565: internal-error: int
  finish_step_over(execution_control_state*): Assertion
  `ecs->event_thread->control.trap_expected' failed"
- PR21774 "Ubuntu: infrun.c:5565: internal-error: int
  finish_step_over(execution_control_state*): Assertion
  `ecs->event_thread->control.trap_expected' failed"
- PR22063 "infrun.c:5570: internal-error: int
  finish_step_over(execution_control_state*): Assertion
  `ecs->event_thread->control.trap_expected' failed.
- PR22925 "gdb assumes target can activate threads at
  will, causes internal error in infrun.c in
  'finish_step_over'"

Interesting about this occurrence is:
- it reproduced with a testsuite test-case.
- the test-case is not a pthreads test-case, which hopefully may make
  things easier.

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #3)
> (In reply to Tom de Vries from comment #2)
> > Spotted again with latest snapshot, reopening.
> 
> FTR, on openSUSE Leap 15.1, on open build service.

Now also reproduced in OBS with 10.0.90 snapshot on openSUSE factory, both pie
and no-pie:
...
binaries-testsuite.openSUSE_Factory_ARM.armv7l/usr/share/doc/packages/gdb-testresults/gdb-armv7hl-suse-linux.-fno-PIE.-no-pie.sum:FAIL:
gdb.base/step-over-syscall.exp: clone: displaced=off: single step over clone
(GDB internal error)
binaries-testsuite.openSUSE_Factory_ARM.armv7l/usr/share/doc/packages/gdb-testresults/gdb-armv7hl-suse-linux.sum:FAIL:
gdb.base/step-over-syscall.exp: clone: displaced=off: single step over clone
(GDB internal error)
...

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[Bug gdb/26284] [arm] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[luis.machado at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #6 from Luis Machado <luis.machado at linaro dot org> ---
I haven't seen this yet on Ubuntu. I'll keep an eye out for it.

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[Bug gdb/26284] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[arm] infrun.c:5312:        |infrun.c:5312:
                   |internal-error: int         |internal-error: int
                   |finish_step_over(execution_ |finish_step_over(execution_
                   |control_state*): Assertion  |control_state*): Assertion
                   |`ecs->event_thread->control |`ecs->event_thread->control
                   |.trap_expected' failed      |.trap_expected' failed
             Target|armv7hl                     |armv7hl, x86_64

--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Also reproduced with different test-case:
...
../../gdb/infrun.c:5886: internal-error: int
finish_step_over(execution_control_state*): Assertion
`ecs->event_thread->control.trap_expected' failed.^M
A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
Quit this debugging session? (y or n) FAIL: gdb.threads/detach-step-over.exp:
breakpoint-condition-evaluation=host: target-non-stop=on: non-stop=on:
displaced=off: iter 2: attach (GDB internal error)
...
This is on OBS with Leap 15.3 x86_64 unix/-m64/-fno-PIE/-no-pie.

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[Bug gdb/26284] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org

--- Comment #8 from Tom Tromey <tromey at sourceware dot org> ---
> target-non-stop=on: non-stop=on: displaced=off

I did not know that non-stop could even work without
displaced stepping.

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[Bug gdb/26284] infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #9 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #7)
> Also reproduced with different test-case:
> ...
> ../../gdb/infrun.c:5886: internal-error: int
> finish_step_over(execution_control_state*): Assertion
> `ecs->event_thread->control.trap_expected' failed.^M
> A problem internal to GDB has been detected,^M
> further debugging may prove unreliable.^M
> Quit this debugging session? (y or n) FAIL:
> gdb.threads/detach-step-over.exp: breakpoint-condition-evaluation=host:
> target-non-stop=on: non-stop=on: displaced=off: iter 2: attach (GDB internal
> error)
> ...

Reproduced this, outside of OBS, on SLE 12 SP5, s390x, exact same failure.

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[Bug gdb/26284] gdb.base/step-over-syscall.exp: infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simark at simark dot ca
            Summary|infrun.c:5312:              |gdb.base/step-over-syscall.
                   |internal-error: int         |exp: infrun.c:5312:
                   |finish_step_over(execution_ |internal-error: int
                   |control_state*): Assertion  |finish_step_over(execution_
                   |`ecs->event_thread->control |control_state*): Assertion
                   |.trap_expected' failed      |`ecs->event_thread->control
                   |                            |.trap_expected' failed

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[Bug gdb/26284] gdb.base/step-over-syscall.exp: infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #10 from Simon Marchi <simark at simark dot ca> ---
I prefixed the subject with the name of the test this bug was originally
reported for, because I think that while this assertion comes up with different
tests, the root causes may be different.

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[Bug gdb/26284] gdb.base/step-over-syscall.exp: infrun.c:5312: internal-error: int finish_step_over(execution_control_state*): Assertion `ecs->event_thread->control.trap_expected' failed

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26284

--- Comment #11 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #9)
> (In reply to Tom de Vries from comment #7)
> > Also reproduced with different test-case:
> > ...
> > ../../gdb/infrun.c:5886: internal-error: int
> > finish_step_over(execution_control_state*): Assertion
> > `ecs->event_thread->control.trap_expected' failed.^M
> > A problem internal to GDB has been detected,^M
> > further debugging may prove unreliable.^M
> > Quit this debugging session? (y or n) FAIL:
> > gdb.threads/detach-step-over.exp: breakpoint-condition-evaluation=host:
> > target-non-stop=on: non-stop=on: displaced=off: iter 2: attach (GDB internal
> > error)
> > ...
> 
> Reproduced this, outside of OBS, on SLE 12 SP5, s390x, exact same failure.

Now also spotted with current trunk, x86_64-linux.

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