2009/6/26 Tomek Grabiec <tgrab...@gmail.com>:
> It's needed to get the class of array elements.
>
> Signed-off-by: Tomek Grabiec <tgrab...@gmail.com>
> ---
> include/vm/object.h | 1 +
> vm/object.c | 9 +++++++++
> 2 files changed, 10 insertions(+), 0 deletions(-)
>
> diff --git a/include/vm/object.h b/include/vm/object.h
> index 587b6bb..29eeb24 100644
> --- a/include/vm/object.h
> +++ b/include/vm/object.h
> @@ -26,6 +26,7 @@ struct vm_object *vm_object_alloc_native_array(int type,
> int count);
> struct vm_object *vm_object_alloc_multi_array(struct vm_class *class,
> int nr_dimensions, int *count);
> struct vm_object *vm_object_alloc_array(struct vm_class *class, int count);
> +struct vm_class *vm_object_get_array_element_class(struct vm_object *array);
>
> struct vm_object *
> vm_object_alloc_string(const uint8_t bytes[], unsigned int length);
> diff --git a/vm/object.c b/vm/object.c
> index 8dfc504..e5951a3 100644
> --- a/vm/object.c
> +++ b/vm/object.c
> @@ -139,6 +139,15 @@ struct vm_object *vm_object_alloc_array(struct vm_class
> *class, int count)
> return res;
> }
>
> +struct vm_class *vm_object_get_array_element_class(struct vm_object *array)
> +{
> + /*
> + * Skip the '[' prefix of array class name to get elements'
> + * class name.
> + */
> + return classloader_load(array->class->name + 1);
> +}
> +
> void vm_object_lock(struct vm_object *obj)
> {
> if (pthread_mutex_lock(&obj->mutex))
> --
Well, as I said on IRC, I think you'd have to remove the L...; as
well. For array-of-ints, the class name is "[I", but for
array-of-Objects, the class name would be "[Ljava/lang/Object;".
I would also have liked to see some asserts in there. For example, you could:
assert(vm_class_is_array_class(array->class));
BTW, you can find the description of that syntax here:
http://java.sun.com/docs/books/jvms/second_edition/html/ClassFile.doc.html#1169
Hope I didn't screw up this time :-)
Vegard
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