CODEWITHSUNDEEP
c++shared-memoryfile-conversion
Mike
Mike

Reputation: 19

Use memory mapped files from Solaris 64 Bit or Linux 32 Bit to Linux 64 Bit

our application uses several memory mapped files to communicate between several processes. The production runs on a solaris with 64 bit and the development machine is a linux with 32 bit. In the future we would like to use a 64 bit linux for all environments. The compiling has already been finished and now I need the data which are stored in the memory mapped files. Unfortunately I get an "bus error", if I use the files from the 32 bit linux. If I have used the files of the 64 bit solaris, the process crashed.

As far as I understand, the bus error occurs because of an adressing error in the 32 bit files (adress beyond the file end). In addition it seems that solaris files are not compatible with a linux system. Thus I have created new memory mapped files on the 64 bit linux and the application works but has obviously no data.

Is there a way that I can read the old version of these files on my new 64 bit linux system? I would like to write my own conversion program to extract the data and to fill the new generated files.

Upvotes: 1

Views: 204

Answers (1)

sashoalm
sashoalm

Reputation: 79537

The reason it crashes is that you load a file to memory, then try to access it using different data structures - even though they look the same in your source code, they are not the same at runtime, not when compiled for different architectures.

Upvotes: 1

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