diff mbox series

[for-next,4/5] tracing: Add warning if string in __assign_str() does not match __string()

Message ID 20240226184951.297987021@goodmis.org
State New
Headers
Series tracing: More updates for 6.9 |

Commit Message

Steven Rostedt Feb. 26, 2024, 6:49 p.m. UTC 
  From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

In preparation to remove the second parameter of __assign_str(), make sure
it is really a duplicate of __string() by adding a WARN_ON_ONCE().

Link: https://lore.kernel.org/linux-trace-kernel/20240223161356.63b72403@gandalf.local.home

Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 include/trace/stages/stage6_event_callback.h | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/include/trace/stages/stage6_event_callback.h b/include/trace/stages/stage6_event_callback.h
index 0c0f50bcdc56..935608971899 100644
--- a/include/trace/stages/stage6_event_callback.h
+++ b/include/trace/stages/stage6_event_callback.h
@@ -35,6 +35,7 @@ 
 	do {								\
 		char *__str__ = __get_str(dst);				\
 		int __len__ = __get_dynamic_array_len(dst) - 1;		\
+		WARN_ON_ONCE((src) != __data_offsets.dst##_ptr_);	\
 		memcpy(__str__, __data_offsets.dst##_ptr_ ? :		\
 		       EVENT_NULL_STR, __len__);			\
 		__str__[__len__] = '\0';				\