[Bug gdb/30246] New: gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[Bug gdb/30246] New: gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

            Bug ID: 30246
           Summary: gdb record and replay , sometime variable operate
                    wrong. but rr works, based on ryzen 4800h cpu(zen
                    architecture)
           Product: gdb
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: czgf2v at 163 dot com
  Target Milestone: 14.1

run 
---------------------
$make -f Makefile;gdb ./main -ex "source ./debug.gdb"
---------------------

after a while,(this bug happens after doing many operations with random numbers
and ‘rc’ command)

output on my machine (the output is wrong)
-------------
...
Active record target: record-full
Replay mode:
Lowest recorded instruction number is 1.
Current instruction number is 257733.
Highest recorded instruction number is 257773.
Log contains 257773 instructions.
Max logged instructions is 2000000000.
$1 = 10100110110111001001101
$2 = 101001101101110010011010
$3 = 0
-------------

but with rr
-------------
$ rr ./main
$ rr replay /home/czg/.local/share/rr/main-3
...
source ./debug_rr.gdb
-------------
(because in rr use 'next' to run and no ‘record’ command needed [rr has
recorded all before], so gdb command file slightly differ)


output on my machine (the output is right)
-------------
$1 = 111111010111001001000010
$2 = 111111010111001001000010
$3 = 1
-------------

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #1 from czgf2v <czgf2v at 163 dot com> ---
I use GNU gdb (GDB) 14.0.50.20221220-git

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #2 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14759
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14759&action=edit
Makefile

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #3 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14760
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14760&action=edit
debug.gdb

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #4 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14761
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14761&action=edit
debug_rr.gdb

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #5 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14762
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14762&action=edit
print_1.gdb

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #6 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14763
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14763&action=edit
main_test.c

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #7 from czgf2v <czgf2v at 163 dot com> ---
Send too many files, which may not look like one minimal test.

But this bug may only occur after doing many complex computations.

I test on simple code, but can not reproduce this bug

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #8 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14764
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14764&action=edit
float-half.h

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #9 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14765
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14765&action=edit
float-half.c

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

czgf2v <czgf2v at 163 dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #14763|0                           |1
        is obsolete|                            |

--- Comment #10 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14766
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14766&action=edit
main_test.c

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #11 from czgf2v <czgf2v at 163 dot com> ---
Created attachment 14767
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14767&action=edit
../lib/random.c

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[Bug gdb/30246] gdb record and replay , sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #12 from czgf2v <czgf2v at 163 dot com> ---
I think maybe move debug related files to one repo better
here it is
https://github.com/czg-sci-42ver/test_record/tree/master

Sorry for attaching too many files, which may have sent too many spam-like
mails frequently.

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[Bug gdb/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

czgf2v <czgf2v at 163 dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gdb record and replay ,     |gdb record full, br … and
                   |sometime variable operate   |rc. Sometime variable
                   |wrong. but rr works, based  |operate wrong. but rr
                   |on ryzen 4800h cpu(zen      |works, based on ryzen 4800h
                   |architecture)               |cpu(zen architecture)

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[Bug gdb/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[czgf2v at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

czgf2v <czgf2v at 163 dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simark at simark dot ca

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[Bug gdb/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

Sam James <sam at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sam at gentoo dot org

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[Bug record/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|gdb                         |record
                 CC|                            |tromey at sourceware dot org

--- Comment #13 from Tom Tromey <tromey at sourceware dot org> ---
It's fine to attach a bunch of files, or even a tar file.

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[Bug record/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

Joel Brobecker <brobecker at gnat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |brobecker at gnat dot com

--- Comment #14 from Joel Brobecker <brobecker at gnat dot com> ---
Hello,

Can you explain why the Target Milestone was set to 14.1?

To give you some context, we use this field to identify issues that we consider
blocking for the next release. Is that the case here, and if yes, what would be
the reasoning?

Thank you.

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[Bug record/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

--- Comment #15 from Joel Brobecker <brobecker at gnat dot com> ---
With the information available so far, it's unclear why this would be a
blocking issue for the GDB 14 release.

Removing the target milestone for now. We can put it back if we get more
evidence that this needs to be fixed before we can release GDB 14.

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[Bug record/30246] gdb record full, br … and rc. Sometime variable operate wrong. but rr works, based on ryzen 4800h cpu(zen architecture)

[brobecker at gnat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30246

Joel Brobecker <brobecker at gnat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|14.1                        |---

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