Can constants loaded by ldc and ldc_w ever be null?
John.Rose at Sun.COM
Fri Mar 13 15:54:04 PDT 2009
On Mar 13, 2009, at 6:22 AM, Gary Benson wrote:
> Keith McGuigan wrote:
>> Gary Benson wrote:
>>> This is hopefully a quick question. Is it ever possible for
>>> an ldc or ldc_w instruction to return a null result?
>> No. It gets the value out of the constant pool (index > 0),
>> which, as far as I can tell, can't encode null.
> Cool. Do you know if it would be possible for a user to override
> it, in a debugger for example?
The anonymous classes feature (internal to hotspot, from the Da Vinci
Machine project) allows anonymous classes to be loaded with 'String'
CP entries edited to arbitrary non-null references. But it doesn't
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