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We *know* the type. That is why we use that particular kernel symbol. The issue is that on kernel without CTF DTrace cannot know the type, so we need to tell it that it is an int. Kris > On 7/31/24 15:01, Kris Van Hees wrote: > > On systems without CTF, we do not know the type of kernel variables. > > By doing an explicit cast to int64_t a negative int is converted into a > > large positive integer. The proper cast is 'int' of course. > > > > Signed-off-by: Kris Van Hees > > --- > > test/unittest/codegen/tst.kernel_read_neg_small_scalar.d | 6 +++--- > > 1 file changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/test/unittest/codegen/tst.kernel_read_neg_small_scalar.d b/test/unittest/codegen/tst.kernel_read_neg_small_scalar.d > > index 7c585d1b..cda6649b 100644 > > --- a/test/unittest/codegen/tst.kernel_read_neg_small_scalar.d > > +++ b/test/unittest/codegen/tst.kernel_read_neg_small_scalar.d > > @@ -1,6 +1,6 @@ > > /* > > * Oracle Linux DTrace. > > - * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved. > > + * Copyright (c) 2022, 2024, Oracle and/or its affiliates. All rights reserved. > > * Licensed under the Universal Permissive License v 1.0 as shown at > > * http://oss.oracle.com/licenses/upl. > > */ > > @@ -11,10 +11,10 @@ BEGIN > > { > > /* > > * Unless we are actually crashing, the `crashing_cpu int will be -1. > > - * We cast it to int64_t to ensure that the value read from the kernel > > + * We cast it to int to ensure that the value read from the kernel > > * is sign-extended. > > */ > > - trace((int64_t)`crashing_cpu); > > + trace((int)`crashing_cpu); > > exit(0); > > }