[DTrace-devel] [PATCH v3] trace: print alloca pointers as actual pointer values

[Eugene Loh]

Largely similar comments to previous versions of this patch:

On 9/15/25 13:36, Kris Van Hees via DTrace-devel wrote:
> Because alloca pointers are stored internally as ofssets into the

The same as for v1 and v2:  s/ofssets/offsets/.

> scratchmem area, they were printed as small integers.  They are
> now printed as actual pointer values into kernel space.

And, again, the patch performs poorly against testing.

The new test gives me:
     -OK 1 OK 333 OK 55555
     +OK 1059965305 OK 1059965637 OK 1060020859
which is to say that the dereferenced values are wrong.  (They are all 
the correct values plus some offset.)

And with this patch, these pre-existing tests fail:
     test/unittest/builtinvar/tst.tid_pid.sh: FAIL: erroneous exitcode (1).
     test/unittest/funcs/alloca/tst.alloca-bcopy-top.d: FAIL: expected 
results differ.
     test/unittest/funcs/bcopy/tst.bcopy_arg_order.d: FAIL: expected 
results differ.
     test/unittest/funcs/copyinto/tst.copyinto_arg_order.d: FAIL: 
expected results differ.

btw...

> diff --git a/test/unittest/actions/trace/tst.alloca.r.p b/test/unittest/actions/trace/tst.alloca.r.p
> new file mode 100755
> @@ -0,0 +1,11 @@
> +#!/usr/bin/gawk -f
> +
> +{
> +	$1 = $1 > 0x7fffffff ? "OK" : "BAD";
> +	$3 = $3 > 0x7fffffff ? "OK" : "BAD";
> +	$5 = $5 > 0x7fffffff ? "OK" : "BAD";
> +}
> +
> +{
> +	print;
> +}

Why are these split over two awk clauses?  Can't they co-exist in the 
same clause?