[antlr-interest] Problem generating the Java parser for Oracle PL/SQL grammar

[Javier Luis Cánovas Izquierdo]

Hi Johannes, thanks for your fast response.

Maybe I have not explined the problem correctly, sorry. I have just
proved that changes.

I have specified the parameter for the JVM for increasing the memory
limit of the JVM. Actually, it is "-Xms1024m -Xmx1024m" (will it need
more? really?) and the options section does not contain the line which
specifies the output language (it only contains the output and k
options).

I did not check that the grammar does not contain C# code. However, I
suppose that the parser process generation should not depends on the
actions included by the user. The problem should appear once the
parser is generated, is it true?. Anyway I have just checked the
grammar and I have cleaned it to remove the C# actions. The problem
keeps on.

I have tested the grammar with antlr 3.0.1 and 3.1.1 and both fail. I
think that there should be some wrong (or maybe there is a problem
with the antlr parser tool). I attach the grammar that I am using and
the trace of the last execution.

Thanks!

2008/10/31 Johannes Luber <jaluber at gmx.de>:
> Javier Luis Cánovas Izquierdo schrieb:
>> Hi,
>>
>> I am working with ANTLRv3 and the Oracle PL/SQL grammar definition
>> which is located in the antlr grammar list webpage and whose author is
>> Andrey Kharitonkin. I need to enrich the grammar in order to create a
>> data structure of the parsed plsql text. However, I have a problem on
>> the first phase: I cannot generate the Java parser with ANTLR tool
>> from the grammar of the webpage.
>>
>> The grammar has activated the backtrack and memoize options and the k
>> value is *. When I try to generate the parser, I get a
>> "java.lang.OutOfMemoryError: Java heap space" (firstTrace.txt file
>> contains the stack trace of this situation). I have tried to
>> deactivate the backtrack and memoize options and to set the k value to
>> 1 (although it will cause warnings during the generation) and the
>> problem keeps on (secondTrace.txt file contains the stack trace of
>> this situation).
>>
>> I have changed the parameters of the JVM to increase the memory limit
>> of the virtual machine to 1gb and again, the problem goes on .
>> However, the memory charge of the java instance does not exceed 100mb.
>> I cannot understand it.
>>
>> I have to be doing some wrong because the grammar that I am using is
>> the same of the grammar list, I have not change anything. I have seen
>> that the grammar has the "language=CSharp" option. Could that be the
>> problem? Could you help me?
>>
>> Thanks
>
> You have two problems: The first is that you need to tell the Java VM to
> use more memory like "java -Xmx1024m ...". Adjust the number to your
> needs. The second problem is that the grammar has been developed with C#
> as the output language. Changing "CSharp" to "Java" (or removing that
> line) won't help entirely, as all actions are written in C#. You have to
> go trough them one by one and fix any incompatibilities.
>
> Johannes
>>
>>
>>
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>>
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>



--
Javier Luis Cánovas Izquierdo
http://zirrus.es
zirrus at gmail.com
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