[Bug remote/12648] New: Incorrect check of exec before offeringsymbol lookup to remote

["erhunter at hotmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12648

           Summary: Incorrect check of exec before offering symbol lookup
                    to remote
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: remote
        AssignedTo: unassigned@sourceware.org
        ReportedBy: erhunter@hotmail.com


Remote targets do not require an exec file, since they can be already
executing.
They can however have a symbol file loaded, and if symbols are loaded, then
they should be offered to the remote target at the time of connection.

Currently there is a check against "exec_bfd" on gdb/remote.c:3353 :

    if (exec_bfd)    /* No use without an exec file.  */
        remote_check_symbols (symfile_objfile);


This causes remote targets with no exec file but with a symbol file to never be
offered symbol lookups.

To reproduce the lack of symbol offer, I can perform the following steps:

Start OpenOCD.
arm-none-eabi-gdb
>symbol-file <symbols.elf>
>target remote localhost:3333

I have commented out the line with if statement, leaving the
remote_check_symbols call to always happen, and symbols are offered correctly,
but am not sure if there are circumstances where this is incorrect.

The reason this bug is important, is that Eclipse CDT uses this method for
connecting to a remote target, and if symbols are not offered, then the RTOS
cannot be detected.

Regards,

Evan Hunter

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