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[H5part] Re: segfaults in h5_close_mesh

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  • From: Achim Gsell <achim.gsell AT>
  • To: Mark Howison <MHowison AT>
  • Cc: h5part AT
  • Subject: [H5part] Re: segfaults in h5_close_mesh
  • Date: Thu, 15 Jul 2010 14:53:01 +0200
  • List-archive: <>
  • List-id: H5Part development and discussion <>

Hi Mark,

On Jul 14, 2010, at 12:39 AM, Mark Howison wrote:

> I've been debugging my H5Part regression tests and I've been getting
> sporadic segfaults during file close that trace through
> h5_close_mesh() to the h5priv_free() calls. My guess is that some of
> the pointers in the H5Fed file data are not being initialized but are
> also not NULL, so the "if(ptr) free(ptr)" logic in h5priv_free isn't
> working. I'm going to try setting all those pointers to NULL initially
> in one of the file open calls.

Yes, all pointers should be initialized with NULL. Otherwise I forgot it and
should be fixed.

> Another problem I've run into is that an h5_write_mesh call always
> gets executed at file close regardless of whether the file is opened
> for writing or reading. If the file is read only, this sets off a
> CHECK_WRITABLE_MODE error. Can that write be moved?

If you have a good idea where to move it ...

Isn't it sufficient just to add a check and skip the h5_write_mesh call if
the file was opened read-only?


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