Re: [PATCH v2 5/7] btrace, gdbserver: remove the to_supports_btrace target method

["Maciej W. Rozycki" <macro at mips dot com>]

On Fri, 26 Jan 2018, Markus Metzger wrote:

> Remove the to_supports_btrace target method and instead rely on detecting errors
> when trying to enable recording.  This will also provide a suitable error
> message explaining why recording is not possible.

 Hmm, v3 of this change (apparently never posted), that is specifically 
commit de6242d30757 ("btrace, gdbserver: remove the to_supports_btrace 
target method"), has broken remote `mips-linux' target debugging 
completely, that is an attempt to make a remote connection fails in the 
initial handshake, e.g.:

Process .../gdb/testsuite/outputs/gdb.base/advance/advance created; pid = 25519
Listening on port 2346
target remote 1.2.3.4:2346
Remote debugging using 1.2.3.4:2346
Reading symbols from .../lib/ld.so.1...done.
0x77fc8de0 in __start () from .../lib/ld.so.1
Protocol error: qXfer:btrace-conf (read-btrace-conf) conflicting enabled responses.
(gdb) continue
The program is not being run.
(gdb) FAIL: gdb.base/advance.exp: can't run to main

See the attached RSP packet exchange log for details.  Please investigate.

  Maciej

Attachment: gdb.txt
Description: Text document