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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (AVRO-117) plug mem leak from flex parser for C++
Date Tue, 22 Sep 2009 18:56:16 GMT

     [ https://issues.apache.org/jira/browse/AVRO-117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doug Cutting updated AVRO-117:
------------------------------

    Status: Open  (was: Patch Available)

Scott, this patch causes compilation to fail for me with:

{noformat}
/usr/bin/flex -oparser/lex.yy.cc parser/avro.l
g++ -Wall -Werror -g   -Wno-unused -I./api -I./parser -I. -isystem/usr/include/boost -c -o
obj/lex.yy.o parser/lex.yy.cc 
parser/avro.l: In member function 'virtual int yyFlexLexer::yylex()':
parser/avro.l:171: error: 'yy_flex_free' was not declared in this scope
make: *** [obj/lex.yy.o] Error 1
{noformat}

I have flex 2.5.35 installed.

> plug mem leak from flex parser for C++
> --------------------------------------
>
>                 Key: AVRO-117
>                 URL: https://issues.apache.org/jira/browse/AVRO-117
>             Project: Avro
>          Issue Type: Bug
>          Components: c++
>            Reporter: Scott Banachowski
>            Assignee: Scott Banachowski
>         Attachments: AVRO-117.patch
>
>
> Valgrind reports a leak coming from the flex parser generated code.
> The flex-generated lexer allocates memory to use for its state stack.  Examining this
code it is clear that once allocated, the stack is never freed.  Since I cannot easily replace
flex code, I inserted the code to free the stack as a lexer rule.  
> Valgrind is happy with the result.

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