From 5040a618353d685c4441b8e64b28d4d248a032d0 Mon Sep 17 00:00:00 2001 From: Vaibhav Nagarnaik Date: Mon, 25 Jul 2011 11:40:57 -0700 Subject: 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 Cc: David Sharp Signed-off-by: Vaibhav Nagarnaik Link: http://lkml.kernel.org/r/1311619257-4970-1-git-send-email-vnagarnaik@google.com Signed-off-by: Steven Rostedt --- parse-events.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/parse-events.c b/parse-events.c index 32c13ac..8cec1ea 100644 --- a/parse-events.c +++ b/parse-events.c @@ -1588,7 +1588,7 @@ 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 { @@ -1609,22 +1609,22 @@ 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 */ @@ -1706,7 +1706,10 @@ 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; -- cgit v1.2.2