[9] RFR (S): 8148753: Compilation fails due to field accesses on array types

Vladimir Kozlov vladimir.kozlov at oracle.com
Mon Feb 1 17:43:20 UTC 2016

Extend comment:

+     // handling in ciField::will_link.

"and throw a java.lang.NoSuchFieldError exception (the expected behavior 
in this case)."

Give different name to first local 'declared_holder' and after array 
type check do cast:

ciInstanceKlass* declared_holder = holder->as_instance_klass();

then you don't need to change following code.


On 2/1/16 7:14 AM, Zoltán Majó wrote:
> Hi,
> please review the patch for 8148753.
> https://bugs.openjdk.java.net/browse/JDK-8148753
> Problem: Compiling methods that access fields of array types fails. The
> problem is that both compilers assume that only fields of instance types
> (but not field of array types) can be accessed. However, an array can be
> also seen as an instance type, as every array is a subclass of
> java.lang.Object.
> Solution: Treat accesses to fields of array types as accesses to fields
> of java.lang.Object. By convention, the java.lang.Object does not have
> any fields. As a result, the generated code will throw a
> java.lang.NoSuchFieldError exception (the expected behavior in this case).
> Webrev:
> http://cr.openjdk.java.net/~zmajo/8148753/webrev.00/
> Testing:
> - JPRT;
> - all JTREG hotspot/compiler tests on all supported platforms.
> Thank you and best regards,
> Zoltan

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