[Bug symtab/26006] New: rereading symbols fails

[Bug symtab/26006] New: rereading symbols fails

[andy-sourceware-bugzilla@ultra-premium.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26006

            Bug ID: 26006
           Summary: rereading symbols fails
           Product: gdb
           Version: 9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: andy-sourceware-bugzilla@ultra-premium.com
  Target Milestone: ---

Created attachment 12552
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12552&action=edit
gdb script which demonstrates the bug

I am running v9.1 on amd64 (I compiled it from source in ubuntu
20.20 using the packaged gcc v9.3.0).

This gdb script (also attached) demonstrates the problem:

shell echo "int main(void) { return 0;}" > test.c
shell gcc -g test.c
file a.out
run
shell sleep 1
shell touch a.out
run
quit

When I run this I get:

$ ./gdb -q -x gdb-bug.gdb
[Inferior 1 (process 257896) exited normally]
`/home/andy/gdb-test/bin/a.out' has changed; re-reading symbols.
warning: Probes-based dynamic linker interface failed.
Reverting to original interface.
[Inferior 1 (process 257902) exited normally]

If I change the "shell sleep 1" to "shell sleep 0" then it works as expected:
$ ./gdb -q -x ~/gdb-bug-sleep0.gdb
[Inferior 1 (process 257948) exited normally]
[Inferior 1 (process 257954) exited normally]


In the context of a non-trivial program, whenever I see the "warning:
Probes-based dynamic linker interface failed." message, this tends to mean
that my stack traces will be broken (filled with ???).

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[Bug sim/26006] rereading symbols fails

[andy-sourceware-bugzilla@ultra-premium.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26006

Andy Owen <andy-sourceware-bugzilla@ultra-premium.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|symtab                      |sim
                 CC|                            |vapier at gentoo dot org

--- Comment #2 from Andy Owen <andy-sourceware-bugzilla@ultra-premium.com> ---
Yes, this fixes the issue at my end.

I will keep on using this version of gdb as my daily driver and let you know if
I see anything bad.

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[Bug gdb/26006] rereading symbols fails

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26006

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|sim                         |gdb
            Version|9.1                         |HEAD

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[Bug gdb/26006] rereading symbols fails

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26006

--- Comment #3 from Simon Marchi <simark at simark dot ca> ---
Thanks for testing!

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[Bug gdb/26006] rereading symbols fails

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26006

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |10.1
             Status|NEW                         |RESOLVED
                 CC|                            |tromey at sourceware dot org
         Resolution|---                         |FIXED

--- Comment #4 from Tom Tromey <tromey at sourceware dot org> ---
This patch went in, so I'm closing this.

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