From eff2c92f86c2ac2a0eab3749d58be39592293c3a Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Mon, 18 Nov 2013 14:23:14 -0500 Subject: [PATCH] tools lib traceevent: Fix use of multiple options in processing field 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 Signed-off-by: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/20131118142314.27ca334b@gandalf.local.home Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 0362d57..8a5b65d 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -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; -- 2.7.4