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From: "md5i at md5i dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug python/30057] New: Pretty printing doesn't seem to happen for
 static members
Date: Fri, 27 Jan 2023 20:41:05 +0000
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X-Bugzilla-Product: gdb
X-Bugzilla-Component: python
X-Bugzilla-Version: 12.1
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X-Bugzilla-Who: md5i at md5i dot com
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30057

            Bug ID: 30057
           Summary: Pretty printing doesn't seem to happen for static
                    members
           Product: gdb
           Version: 12.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: python
          Assignee: unassigned at sourceware dot org
          Reporter: md5i at md5i dot com
  Target Milestone: ---

Created attachment 14635
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14635&action=3Ded=
it
test program

For some reason, I'm having difficulty getting Python pretty printers to wo=
rk
properly on static members.  For example:

I compile the included program, foo.cpp:

  g++ -std=3Dc++20 -ggdb3 -o foo foo.cpp

Then I set run gdb on the executable:

  gdb --quiet foo

Here is the session without the pretty printer:

  Reading symbols from foo...
  (gdb) start
  Temporary breakpoint 1 at 0x112d: file foo.cpp, line 22.
  Starting program: /home/md5i/tmp/gdbtest/foo=20
  [Thread debugging using libthread_db enabled]
  Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

  Temporary breakpoint 1, main () at foo.cpp:22
  22        X x;
  (gdb) n
  23      }
  (gdb) p x
  $1 =3D {a =3D {x =3D 0}, static b =3D {x =3D 1}, c =3D {x =3D 2},=20
    static d =3D <same as static member of an already seen type>}
  (gdb) p x.b
  $2 =3D {x =3D 1}
  (gdb) p x.d
  $3 =3D {x =3D 3}

Pretty much what you would expect, though what is that "<same as ... >" thi=
ng?

Then, loading the included python pretty printer:

  (gdb) source foo.py
  (gdb) p x
  $4 =3D {a =3D {Foo_A_B_C =3D 0}, static b =3D {x =3D 1}, c =3D {Foo_B_C_A=
 =3D 2},=20
    static d =3D <same as static member of an already seen type>}
  (gdb) p x.b
  $5 =3D {Foo_A_B_C =3D 1}
  (gdb) p x.d
  $6 =3D {Foo_B_C_A =3D 3}

As you can see, b as part of x does not use the pretty printer.  And d has =
the
same "<same as ... >" problem as before.

--=20
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