[caffe2] Update tracepoint USDT macros (#105232)
Summary:
Fix existing CAFFE static tracepoint macros and make them match the latest FOLLY version.
Per anakryiko, current `CAFE_SDT` definition is broken. Quote:
```
"Arguments: -5@-16(%rbp) -4@$100
Arguments: -8@-16(%rbp) -4@$100
#define FOLLY_SDT_IS_ARRAY_POINTER(x) ((__builtin_classify_type(x) == 14) || \
(__builtin_classify_type(x) == 5))
vs
#define CAFFE_SDT_ISARRAY(x) (__builtin_classify_type(x) == 14)
https://github.com/atgreen/gcc/blob/master/gcc/typeclass.h
that 5 is "pointer_type_class"
so you were right, it's just fixed up version of header
I think it should be 8, not 5
5 is the size of literal, but you don't pass string literal as an argument, you pass its address, so actual argument is a pointer, and so 8 byte long
you can try just fixing up CAFFE_SDT macro
```
{F1048035373}
Test Plan:
Tested the following macros on test scripts with libbpf USDTs:
CAFFE_SDT
CAFFE_DISABLE_SDT
CAFFE_SDT_WITH_SEMAPHORE
Reviewed By: RihamSelim
Differential Revision: D47159249
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105232
Approved by: https://github.com/chaekit, https://github.com/malfet
