[armedbear-devel] failure to compile big files

[Erik Huelsmann]

Alessio,

Did you find time to fix the issue mentioned below, or should we file
an issue in order to keep track?

Bye,

Erik.

On Sun, Aug 22, 2010 at 10:14 PM, Alessio Stalla
<alessiostalla at gmail.com> wrote:
> On Sun, Aug 22, 2010 at 3:19 PM, Carlos Ungil <carlos.ungil at gmail.com> wrote:
>> Dear ABCL developers,
>>
>> trying to "compile-file" the following fragment of code using the
>> latest release results in an error "s2 argument 32778 out of 16-bit
>> signed range."
>>
>> -----------------------------------------------------
>>
>> (defmacro many-functions (n)
>>  (append '(progn)
>>          (loop for i from 1 to n
>>             collect `(defun ,(intern (format nil "TEST~A" i)) ()
>>                        (print ,i)))))
>>
>> (many-functions 1525)
>>
>> -----------------------------------------------------
>>
>> There are no problems with 0.20 (even for much bigger values of the
>> parameter, i.e. bigger output files). I encountered the problem with a
>> file containing several calls to the macro def-java-class in Jfli. It
>> took me some time to discover that splitting the file in two was
>> enough to make the problem go away...
>>
>> This is not a critical bug (it's usually easy to reorganize the code
>> to ensure the files are small enough), but you might want to look at
>> it.
>
> The bug appears to be caused by the new way functions are loaded to
> avoid reflection: a big loader function is created that installs all
> the other functions by instantiating them as Java objects directly in
> bytecode. Since a function gets compiled to a single method and
> there's a limit on the size of a method, I believe we're hitting that
> limit. The obvious solution is to split the big method in many smaller
> methods (say, one every 1024 functions). I'd say this is a nice
> occasion to test Erik's new class-file writer! ;) So, stay tuned: I'll
> try to fix the bug asap.
>
> Cheers, and thanks for the report,
> Alessio
>
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