bugGNU Scientific Library - Bugs: bug #49518, bug in matrix/vector tests


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bug #49518: bug in matrix/vector tests

Submitter:  Patrick Alken <psa>
Submitted:  Wed 02 Nov 2016 07:37:24 PM UTC
Category:  Build Severity:  3 - Normal
Operating System:  Status:  None
Assigned to:  None Open/Closed:  Open

Wed 02 Nov 2016 07:37:24 PM UTC, original submission:  

from kmb2718 =at= gmail =dot= com

I found a bug in matrix and vector testing routines under MS Visual Studio
64bit build.

To open a temporary file, following code is used in some test routines.


char filename[] = "test.XXXXXX";

#if !defined( _WIN32 )

  int fd = mkstemp(filename);


  char * fd = _mktemp(filename);

# define fdopen fopen



Under MS Visual Studio, _mktemp() is used without its function declaration
because the declaration resides in <io.h>.

 At compile time, the function is treated as an integer returning function
but it return an address of the filename string.

Under 64bit build condition, test programs using above code crashes due to
pointer value truncation (64bit pointer -> 32bit integer -> 64bit pointer

To prevent this problem, test.c for vector or matrix needs to include
<io.h> as follows.


#ifdef _WIN32

#include <io.h>



_mktemp() is used in following files.






Best Regards,


Patrick Alken <psa>
Group administrator


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