[Bug gdb/18090] New: Binary is truncated to zero size when testing gdbserver and gdb in same directory on same pc

[Bug gdb/18090] New: Binary is truncated to zero size when testing gdbserver and gdb in same directory on same pc

[rjshaw at netspace dot net.au]

https://sourceware.org/bugzilla/show_bug.cgi?id=18090

            Bug ID: 18090
           Summary: Binary is truncated to zero size when testing
                    gdbserver and gdb in same directory on same pc
           Product: gdb
           Version: 7.9
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: rjshaw at netspace dot net.au

Hi,
I started in /home/russell/myprogdir/

gdbserver main:1234 myprog

then i do in gdb:

(gdb) target extended-remote main:1234
Remote debugging using main:1234
(gdb) cd /home/russell/myprogdir
Working directory /home/russell/myprogdir.
(gdb) file myprog
Reading symbols from myprog...done.
(gdb) remote put myprog myprog
Successfully sent file "myprog".

When testing with gdbserver invoked on the same pc (main) in the same directory
(/home/russell/myprogdir), "myprog" is truncated to 0 bytes by "remote put
myprog myprog".

"remote put" should first copy myprog to /tmp, open the remote myprog for
writing (which truncates it), then copy from /tmp. Another way is to note the
source and dest are the same, and skip the copying.

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[Bug gdb/18090] Binary is truncated to zero size when testing gdbserver and gdb in same directory on same pc

[palves at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18090

Pedro Alves <palves at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |palves at redhat dot com

--- Comment #1 from Pedro Alves <palves at redhat dot com> ---
I wonder how e.g., scp(1) handles this:

 $ echo "hello" > /tmp/foo
 $ cat /tmp/foo
 hello
 $ scp /tmp/foo localhost:/tmp/foo 
 foo                                     100%    6     0.0KB/s   00:00    
 $ cat /tmp/foo
 hello

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[Bug gdb/18090] Binary is truncated to zero size when testing gdbserver and gdb in same directory on same pc

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=18090

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
It doesn't truncate the file first, only at the end.

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[Bug gdb/18090] Binary is truncated to zero size when testing gdbserver and gdb in same directory on same pc

[palves at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18090

--- Comment #3 from Pedro Alves <palves at redhat dot com> ---
Thanks.  Sounds like we should do that too then.

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