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authorVaibhav Nagarnaik <vnagarnaik@google.com>2012-04-06 02:48:01 +0400
committerFrederic Weisbecker <fweisbec@gmail.com>2012-04-25 15:35:32 +0400
commit14ffde0e966efab6724e2de3ab470b78d4e01109 (patch)
tree37ab19cc24cf0b2e17bd6d2ba6218f5eb077ed6f /tools/lib/traceevent
parentd69afed55be1016c2bcfcb3e00cd5365d2f557f6 (diff)
downloadlinux-14ffde0e966efab6724e2de3ab470b78d4e01109.tar.xz
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>
Diffstat (limited to 'tools/lib/traceevent')
-rw-r--r--tools/lib/traceevent/event-parse.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index ef2c65f91677..cdb32c78d150 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -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;