* [PATCH] tracing: Add warning if string in __assign_str() does not match __string()
@ 2024-02-23 20:48 Steven Rostedt
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From: Steven Rostedt @ 2024-02-23 20:48 UTC (permalink / raw)
To: LKML, Linux Trace Kernel; +Cc: Masami Hiramatsu, Mathieu Desnoyers
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().
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
include/trace/stages/stage6_event_callback.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/trace/stages/stage6_event_callback.h b/include/trace/stages/stage6_event_callback.h
index 0c0f50bcdc56..7372e2c2a0c4 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) && (src) != __data_offsets.dst##_ptr_); \
memcpy(__str__, __data_offsets.dst##_ptr_ ? : \
EVENT_NULL_STR, __len__); \
__str__[__len__] = '\0'; \
--
2.43.0
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2024-02-23 20:48 [PATCH] tracing: Add warning if string in __assign_str() does not match __string() Steven Rostedt
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