trace: [tracetool] Add method 'Event.api' to build event names

Makes it easier to ensure proper naming across the different frontends and backends.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [tracetool] Add methods 'Event.copy' and 'Arguments.copy'

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [tracetool] Spacing changes

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [tracetool] Cosmetic changes

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [tracetool] Show list of frontends and backends sorted by name

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [tracetool] Change format docs to point to the generated file

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [simple] Bump up log version number

The following tracetool cleanup changes the event numbering policy.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
trace: [tracetool] Minimize the amount of per-backend code

Backends now only contain the essential backend-specific code, and most of the work is moved to frontend code.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
configure: Show trace output file conditionally

It is only used with the simple trace backend.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' into staging

Tracing pull request

# gpg: Signature made Wed 07 May 2014 18:14:02 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/tracing-pull-request:
  configure: Show trace output file conditionally
  trace: [tracetool] Minimize the amount of per-backend code
  trace: [simple] Bump up log version number
  trace: [tracetool] Change format docs to point to the generated file
  trace: [tracetool] Show list of frontends and backends sorted by name
  trace: [tracetool] Cosmetic changes
  trace: [tracetool] Spacing changes
  trace: [tracetool] Add methods 'Event.copy' and 'Arguments.copy'
  trace: [tracetool] Add method 'Event.api' to build event names

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>