On Tue, 3 Feb 2026 18:04:21 +0800 (CST)
"jempty.liang" <[email protected]> wrote:
> > #include "trace_output.h"
> >
> >+/* The alignment of a type when in a structure */
> >+#define ALIGN_STRUCTFIELD(type) ((int)(__alignof__(struct {type b;})))
> >+
> > /* Stub function for events with triggers */
> > static int ftrace_event_register(struct trace_event_call *call,
> > enum trace_reg type, void *data)
> >@@ -88,7 +91,7 @@ static void __always_unused ____ftrace_check_##name(void)
> > \
> > #undef __field_ext
> > #define __field_ext(_type, _item, _filter_type) { \
> > .type = #_type, .name = #_item, \
> >- .size = sizeof(_type), .align = __alignof__(_type), \
> >+ .size = sizeof(_type), .align = ALIGN_STRUCTFIELD(_type), \
> > is_signed_type(_type), .filter_type = _filter_type },
> >
> On the 32-bit ARM platform, when _type is unsigned long long, the resulting
> align value is 8 instead of the expected 4.
> >
Are you saying this still doesn't work?
That would be an issue because then it would have the same bugs with
generic trace events which uses the same solution.
-- Steve
