qemu/include/qapi/qmp
Markus Armbruster 84a56f38b2 json: Pass lexical errors and limit violations to callback
The callback to consume JSON values takes QObject *json, Error *err.
If both are null, the callback is supposed to make up an error by
itself.  This sucks.

qjson.c's consume_json() neglects to do so, which makes
qobject_from_json() null instead of failing.  I consider that a bug.

The culprit is json_message_process_token(): it passes two null
pointers when it runs into a lexical error or a limit violation.  Fix
it to pass a proper Error object then.  Update the callbacks:

* monitor.c's handle_qmp_command(): the code to make up an error is
  now dead, drop it.

* qga/main.c's process_event(): lumps the "both null" case together
  with the "not a JSON object" case.  The former is now gone.  The
  error message "Invalid JSON syntax" is misleading for the latter.
  Improve it to "Input must be a JSON object".

* qobject/qjson.c's consume_json(): no update; check-qjson
  demonstrates qobject_from_json() now sets an error on lexical
  errors, but still doesn't on some other errors.

* tests/libqtest.c's qmp_response(): the Error object is now reliable,
  so use it to improve the error message.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180823164025.12553-40-armbru@redhat.com>
2018-08-24 20:26:37 +02:00
..
dispatch.h qmp: Use QDict * instead of QObject * for response objects 2018-07-03 23:18:56 +02:00
json-lexer.h json: Treat unwanted interpolation as lexical error 2018-08-24 20:26:37 +02:00
json-parser.h json: Redesign the callback to consume JSON values 2018-08-24 20:26:37 +02:00
json-streamer.h json: Redesign the callback to consume JSON values 2018-08-24 20:26:37 +02:00
qbool.h qobject: use a QObjectBase_ struct 2018-05-04 08:27:53 +02:00
qdict.h block: Add block-specific QDict header 2018-06-15 14:49:44 +02:00
qerror.h json: Pass lexical errors and limit violations to callback 2018-08-24 20:26:37 +02:00
qjson.h qobject: qobject_from_jsonv() is dangerous, hide it away 2018-08-16 08:42:06 +02:00
qlist.h qobject: use a QObjectBase_ struct 2018-05-04 08:27:53 +02:00
qlit.h qlit: add qobject_from_qlit() 2018-03-19 10:00:14 -05:00
qnull.h qobject: Modify qobject_ref() to return obj 2018-05-04 08:27:53 +02:00
qnum.h qobject: use a QObjectBase_ struct 2018-05-04 08:27:53 +02:00
qobject.h qobject: Modify qobject_ref() to return obj 2018-05-04 08:27:53 +02:00
qstring.h qstring: Fix qstring_from_substr() not to provoke int overflow 2018-07-28 09:09:58 +02:00