Thank you for approving of this post. It was sent a few days ago, and is
posted with an old date. So I'm replying to bump it up.
On 29.10.2016 4:13 AM, Samer Afach wrote:
> Dear HDF5 experts:
>
> I've been investigating memory leaks in a program of mine, and then
> found that the function H5LTopen_file_image is causing the leak. I
> created a minimal example reproducing the problem, which just opens
> and closes a file again and again and again, after reading the file
> into memory only once, and one could see a clear memory build-up.
> Could someone please verify that I'm not doing anything wrong?
>
> Below is the minimal working example of the program. I tested it with
> valgrind/massif, using the command:
>
> $ valgrind --tool=massif ./LeakTest
>
> And one could obviously see the memory rise. What I have in my
> application is a file in memory (as in the example) that I need to
> read without modifying it or releasing it. The only way I was able to
> get rid of the memory leak, is by using the flag
> H5LT_FILE_IMAGE_OPEN_RW, which means that the image will be copied,
> and I'm trying to avoid that. Is this a bug in the HDF5 library? Or am
> I doing something wrong?
>
> #include<iostream>
> #include<fstream>
> #include<hdf5.h>
> #include<hdf5_hl.h>
> std::size_tGetFileSize(conststd::string&filename)
> {
> std::ifstreamfile(filename.c_str(),std::ios::binary|std::ios::ate);
> returnstatic_cast<size_t>(file.tellg());
> }
> voidReadBinFileToString(conststd::string&filename,std::string&data)
> {
> std::fstreamfileObject(filename.c_str(),std::ios::in|std::ios::binary);
> size_tfilesize=GetFileSize(filename);
> data.resize(filesize);
> if(filesize>0){
> fileObject.read(&data.front(),filesize);
> fileObject.close();
> }
> else{
> std::cout<<"Errorreadingfile"<<std::endl;
> std::exit(1);
> }
> }
> intmain()
> {
> std::stringh5data;
> ReadBinFileToString("../Test.h5",h5data);
> longnumOfTests=25000;
> for(longi=0;i<numOfTests;i++)
> {
> hid_tfileHandle=H5LTopen_file_image((void*)&h5data.front(),h5data.size(),H5LT_FILE_IMAGE_DONT_COPY|H5LT_FILE_IMAGE_DONT_RELEASE);
> H5Fclose(fileHandle);
> std::cout<<"\r";std::cout<<i<<":"<<numOfTests;std::cout.flush();
> }
> return0;
> }
> Thank you.
>
> Best,
> Samer Afach
>
>
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