Hi Dan, Thanks for the tip, I didn't realize these functions existed. Unfortunately, however, this didn't fix the problem...
Balint 2016-01-08 15:03 GMT+01:00 Daniel Tetlow <daniel.tet...@optasense.com>: > Hi, > > > > You could try using the H5allocate_memory and H5free_memory functions in > the filter, instead of regular malloc and free. > > > > > > Dan. > > > > > > *From:* Hdf-forum [mailto:hdf-forum-boun...@lists.hdfgroup.org] *On > Behalf Of *Bálint Balázs > *Sent:* 08 January 2016 13:51 > *To:* hdf-forum@lists.hdfgroup.org > *Subject:* [Hdf-forum] Memory corruption problems with a dynamic filter > in jhdf5 > > > > Hi, > > I'm working on a compression filter for HDF5, but I had some problems with > jhdf5 opening the filtered datasets. > > > > I managed to trace down the problem to this: the filter plugin is found, > starts execution, but when it wants to free the original buffer, the > program exits with a memory heap corruption error. This is a minimal > version of the filter that reproduces the error: > > > size_t H5Z_dummy_filter(unsigned int flags, size_t cd_nelmts, const > unsigned int cd_values[], size_t nbytes, size_t *buf_size, void **buf) > { > int* outbuf = (int*)malloc(*buf_size); > memcpy(outbuf, *buf, *buf_size); > free(*buf); // error occurs here > *buf = outbuf; > return nbytes; > } > > This (dummy) filter works from C++, from the command line with h5dump, and > also with HDFView. I only had a problem when using it with Fiji, which uses > the jhdf5 library (14.12.2). > > I compiled the dll with Visual Studio 2013 on Windows 7 64 bit, and use > the 64 bit version of Java 8 with Fiji. > > > > Thanks in advance for the help! > > Cheers, > > Balint > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > Hdf-forum@lists.hdfgroup.org > http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > Twitter: https://twitter.com/hdf5 >
_______________________________________________ Hdf-forum is for HDF software users discussion. Hdf-forum@lists.hdfgroup.org http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
