Memory leak problem reported with gfortran

Jerry DeLisle jvdelisle@verizon.net
Sun Feb 10 22:58:00 GMT 2008


Corinna Vinschen wrote:
> On Feb  5 17:23, Jerry DeLisle wrote:
>> Corinna Vinschen wrote:
>>> On Feb  4 17:24, Christopher Faylor wrote:
>>>> On Mon, Feb 04, 2008 at 01:25:27PM -0800, Jerry DeLisle wrote:
>>>>> The test also appears very clean on Linux.  The gfortran library is
>>>>> implemented in C.  I need to examine some dumps from the compiler and I
>>>>> will get back with you off list if I don't spot the problem.
>>>> I am fairly certain that Corinna would want to keep any correspondence
>>>> on-list.
>>> Yup, that's right.
>> OK, we have isolated the problem now.  Confirming its in the libgfortran.  
>> The reason we did not see it on Linux is because we just did not run out of 
>> memory yet and when the test program completes, it does actually free what 
>> was allocated.  We are failing to reuse an already allocated block so we 
>> were allocating a new one for every single WRITE to the string.
>>
>> Thanks for all your help.
> 
> Thanks for letting us know.
> 
> 
> Corinna
> 
An interim patch to gcc 4.3 has been committed to svn.  see gcc bugzilla pr35063 
for details.  It was a mutex lock issue.  Not closing the handle after the lock 
was no longer needed.

Jerry

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