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parse-events: Handle opcode parsing error 

If an invalid opcode is encountered in parsing event print format, the
trace-cmd calls exit() without parsing any other events.

This patch adds handling for such an error where the get_op_prio() is
called. If the return value is -1, then the event print format parsing
is skipped and parsing continues.

Cc: Michael Rubin <mrubin@google.com>
Cc: David Sharp <dhsharp@google.com>
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
Link: http://lkml.kernel.org/r/1311619257-4970-1-git-send-email-vnagarnaik@google.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arun Sharma <asharma@fb.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Vaibhav Nagarnaik 2012-04-06 00:48:01 +02:00 committed by Frederic Weisbecker
parent d69afed55b
commit 14ffde0e96
1 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
tools/lib/traceevent/event-parse.c
View File

@ -1592,7 +1592,7 @@ static int get_op_prio(char *op)
case '?':
return 16;
default:
die("unknown op '%c'", op[0]);
do_warning("unknown op '%c'", op[0]);
return -1;
}
} else {
@ -1613,22 +1613,22 @@ static int get_op_prio(char *op)
} else if (strcmp(op, "||") == 0) {
return 15;
} else {
die("unknown op '%s'", op);
do_warning("unknown op '%s'", op);
return -1;
}
}
}
static void set_op_prio(struct print_arg *arg)
static int set_op_prio(struct print_arg *arg)
{
/* single ops are the greatest */
if (!arg->op.left || arg->op.left->type == PRINT_NULL) {
if (!arg->op.left || arg->op.left->type == PRINT_NULL)
arg->op.prio = 0;
return;
}
else
arg->op.prio = get_op_prio(arg->op.op);
arg->op.prio = get_op_prio(arg->op.op);
return arg->op.prio;
}
/* Note, *tok does not get freed, but will most likely be saved */
@ -1710,7 +1710,10 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
arg->op.op = token;
arg->op.left = left;
set_op_prio(arg);
if (set_op_prio(arg) == -1) {
event->flags |= EVENT_FL_FAILED;
goto out_free;
}
type = read_token_item(&token);
*tok = token;