[Bug breakpoints/27509] New: ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[Bug breakpoints/27509] New: ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[egarcia.charger at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27509

            Bug ID: 27509
           Summary: ARM Cortex-M7: Setting breakpoint and stepping through
                    causes internal error at function 'finish_step_over'
           Product: gdb
           Version: 10.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: breakpoints
          Assignee: unassigned at sourceware dot org
          Reporter: egarcia.charger at gmail dot com
  Target Milestone: ---

Here is my setup: J-LINK Plus -> Cortex-M7 (STM32H750). 
GDB: GNU gdb (GNU Arm Embedded Toolchain 10-2020-q4-major) 10.1.90.20201028-git
RTOS: ChibiOS
JLinkGDBServer: JLinkARM.dll V6.90a (DLL compiled Dec 14 2020 17:13:26)

Error: 

[New Remote target]
/tmp/jenkins-GCC-10-pipeline-48_20201124_1606180639/src/gdb/gdb/infrun.c:5690:
internal-error: int finish_step_over(struct execution_control_state *):
Assertion `ecs->event_thread->control.trap_expected' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

Steps:

1. Launch JLinkGDBServer with the flag `-rtos GDBServer/RTOSPlugin_ChibiOS` to
enable thread awareness.
2. Set breakpoint in code.
3. Program code then run to breakpoint.
4. Step through code.
5. Error occurs.

Temporary Workaround:

Disable thread awareness when launching JLinkGDBServer (definitely not ideal
since thread awareness is very useful).

I tried this on v9.2 and v10.1 of GDB and both have the same error, just at
different line numbers. Is there anymore information I can provide to help you
fix this issue? It makes debugging extremely unusable.

Thank you.

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[Bug breakpoints/27509] ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[egarcia.charger at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27509

egarcia.charger at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical

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[Bug breakpoints/27509] ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=27509

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-03-04
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
                 CC|                            |simark at simark dot ca

--- Comment #1 from Simon Marchi <simark at simark dot ca> ---
Can you check whether this is the same issue as

  https://sourceware.org/bugzilla/show_bug.cgi?id=26819

?  If so, it should be fixed in master.  Can you try with master?

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[Bug breakpoints/27509] ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27509

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org
             Status|NEW                         |WAITING

--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
If this was using OpenOCD then it probably is a dup.
Waiting to hear from the OP though.

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[Bug breakpoints/27509] ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[bohdan200 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27509

Bohdan Tymkiv <bohdan200 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bohdan200 at gmail dot com

--- Comment #3 from Bohdan Tymkiv <bohdan200 at gmail dot com> ---
Hello gentlemen,

>> JLinkGDBServer: JLinkARM.dll V6.90a (DLL compiled Dec 14 2020 17:13:26)
>> Launch JLinkGDBServer with the flag `-rtos GDBServer/RTOSPlugin_ChibiOS`

This is not an OpenOCD, OP is definitely using native SEGGER tools.

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[Bug breakpoints/27509] ARM Cortex-M7: Setting breakpoint and stepping through causes internal error at function 'finish_step_over'

[luis.machado at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27509

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |luis.machado at arm dot com

--- Comment #4 from Luis Machado <luis.machado at arm dot com> ---
I seem to recall J-LINK reported the initial thread number as something that
wasn't quite correct (42000, I think), and gdb eventually got confused with it.

I'm not sure if it is the same problem though. We'd need a RSP log to tell.

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