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//=================================================================

//

//        malloc2.c

//

//        Stress testcase for C library malloc(), calloc() and free()

//

//=================================================================

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//=================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     jlarmour

// Contributors:  

// Date:          2000-04-30

// Description:   Contains testcode to stress-test C library malloc(),

//                calloc() and free() functions

//

//

//####DESCRIPTIONEND####

// INCLUDES

#include <pkgconf/system.h> // Overall system configuration

#include <pkgconf/memalloc.h>  // config header so we can know size of malloc pool

#ifdef CYGPKG_ISOINFRA

# include <pkgconf/isoinfra.h>

# include <stdlib.h>

#endif

#include <cyg/infra/testcase.h>

#if !defined(CYGPKG_ISOINFRA)

# define NA_MSG "Requires isoinfra package"

#elif !CYGINT_ISO_MAIN_STARTUP

# define NA_MSG "Requires main() to be called"

#elif !CYGINT_ISO_MALLOC

# define NA_MSG "Requires malloc"

#elif !CYGINT_ISO_MALLINFO

# define NA_MSG "Requires mallinfo"

#endif

#ifdef NA_MSG

void

cyg_start(void)

{

    CYG_TEST_INIT();

    CYG_TEST_NA( NA_MSG );

    CYG_TEST_FINISH("Done");

}

#else

// CONSTANTS

#define NUM_ITERATIONS 1000

// GLOBALS

static int problem=0;

// FUNCTIONS

extern int

cyg_memalloc_maxalloc( void );

static void *

safe_malloc( size_t size )

{

    void *ptr;

    ptr=malloc(size);

    if (ptr==NULL)

    {

        CYG_TEST_FAIL( "malloc returned NULL! "

                       "Perhaps the allocator doesn't coalesce?" );

        problem++;

    } // if

    return ptr;

} // safe_malloc()

static void *

safe_calloc( size_t size )

{

    void *ptr;

    int i;

    ptr=calloc(size,1);

    if (ptr==NULL)

    {

        CYG_TEST_FAIL( "calloc returned NULL! "

                       "Perhaps the allocator doesn't coalesce" );

        problem++;

    } // if

    else

    {

        for (i=0; i < size; i++)

        {

            if (((char *)ptr)[i] != 0)

            {

                CYG_TEST_FAIL("calloc didn't clear data completely");

                problem++;

                return ptr;

            } // if

        } // for

    } // else

    return ptr;

} // safe_calloc()

static void

fill_with_data( char *buf, int size )

{

    int i;

    for (i=0; i < size; i++)

        buf[i] = 'f';

    for (i=0; i < size; i++)

        if (buf[i] != 'f')

        {

            CYG_TEST_FAIL( "data written to buffer does not compare "

                           "correctly! #1" );

            problem++;

            return;

        } // if

    for (i=0; i < size; i++)

        buf[i] = 'z';

    for (i=0; i < size; i++)

        if (buf[i] != 'z')

        {

            CYG_TEST_FAIL( "data written to buffer does not compare "

                           "correctly! #2" );

            problem++;

            return;

        } // if

} // fill_with_data()

int

main( int argc, char *argv[] )

{

    char *str1, *str2, *str3;

    int j;

    int poolmax;

    CYG_TEST_INIT();

    CYG_TEST_INFO("Starting stress tests from testcase " __FILE__ " for C "

                  "library malloc(), calloc() and free() functions");

    poolmax = mallinfo().maxfree;

    if ( poolmax <= 0 ) {

        CYG_TEST_FAIL_FINISH( "Can't determine allocation size to use" );

    }

    if ( poolmax < 300 )

    {

        CYG_TEST_FAIL_FINISH("This testcase cannot safely be used with a "

                             "memory pool for malloc less than 300 bytes");

    } // if

    for ( j=1; j < NUM_ITERATIONS; j++)

    {

//        if ((j % 100) == 0)

//            CYG_TEST_STILL_ALIVE( j, "Multiple mallocs and frees continuing" );

        str1 = (char *)safe_malloc(50);

        fill_with_data( str1, 50 );

        str2 = (char *)safe_calloc(11);

        fill_with_data( str2, 11 );

        str3 = (char *)safe_malloc(32);

        fill_with_data( str3, 32 );

        free(str2);

        free(str1);

        str2 = (char *)safe_calloc(11);

        fill_with_data( str2, 11 );

        free(str2);

        str1 = (char *)safe_calloc(50);

        fill_with_data( str1, 50 );

        free(str3);

        str3 = (char *)safe_malloc(32);

        fill_with_data( str3, 32 );

        free(str1);

        str2 = (char *)safe_calloc(11);

        fill_with_data( str2, 11 );

        str1 = (char *)safe_malloc(50);

        fill_with_data( str1, 50 );

        free(str3);

        free(str1);

        free(str2);

        if (problem != 0)

            break;

    } // for

    // Did it completely successfully?

    if (j==NUM_ITERATIONS)

        CYG_TEST_PASS("Stress test completed successfully");

    CYG_TEST_FINISH("Finished stress tests from testcase " __FILE__ " for C "

                    "library malloc(), calloc() and free() functions");

    return 0;

} // main()

#endif // ifndef NA_MSG

// EOF malloc2.c