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tools lib traceevent: Fix use of multiple options in processing field

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Jiri Olsa reported that the scsi_dispatch_cmd_done event failed to parse
with:

  Error: expected type 5 but read 4
  Error: expected type 5 but read 4

The problem is with this part of the print_fmt:

  __print_symbolic(((REC->result) >> 24) & 0xff, ...

The __print_symbolic() helper function's first parameter is the field to
use to determine what symbol to print based on the value of the result.
The parser can handle one operation, but it can not handle multiple
operations ('>>' and '&').

Add code to process all operations for the field argument for
__print_symbolic() as well as __print_flags().

Reported-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20131118142314.27ca334b@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Steven Rostedt 2013-11-18 14:23:14 -05:00 committed by Arnaldo Carvalho de Melo
parent 50a2740b83
commit eff2c92f86
1 changed files with 21 additions and 2 deletions
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23
tools/lib/traceevent/event-parse.c
View file

@ -1606,6 +1606,24 @@ process_arg(struct event_format *event, struct print_arg *arg, char **tok)
static enum event_type
process_op(struct event_format *event, struct print_arg *arg, char **tok);
/*
* For __print_symbolic() and __print_flags, we need to completely
* evaluate the first argument, which defines what to print next.
*/
static enum event_type
process_field_arg(struct event_format *event, struct print_arg *arg, char **tok)
{
enum event_type type;
type = process_arg(event, arg, tok);
while (type == EVENT_OP) {
type = process_op(event, arg, tok);
}
return type;
}
static enum event_type
process_cond(struct event_format *event, struct print_arg *top, char **tok)
{
@ -2371,7 +2389,7 @@ process_flags(struct event_format *event, struct print_arg *arg, char **tok)
goto out_free;
}
type = process_arg(event, field, &token);
type = process_field_arg(event, field, &token);
/* Handle operations in the first argument */
while (type == EVENT_OP)
@ -2424,7 +2442,8 @@ process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
goto out_free;
}
type = process_arg(event, field, &token);
type = process_field_arg(event, field, &token);
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free_field;