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#include <stdio.h>
#include <stdlib.h>
#include "tests/sys_mman.h"
int main(int argc, char **argv)
{
void *p1;
void *p2;
if ( ( p1 = mmap( 0, 4096, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0 ) ) == MAP_FAILED )
{
perror( "aligned mmap failed" );
exit( 1 );
}
if ( munmap( p1, 4096 ) != 0 )
{
perror( "aligned munmap failed" );
exit( 1 );
}
// This fails because MAP_FIXED is specified and p1+1 isn't page-aligned.
// (On Linux, just non-page-alignment is enough for failure, but on Darwin
// MAP_FIXED has to also be specified.)
if ( ( p2 = mmap( p1 + 1, 4096, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0 ) ) == MAP_FAILED )
{
perror( "unaligned mmap failed" );
exit( 1 );
}
if ( munmap( p2, 4096 ) != 0 )
{
perror( "unaligned munmap failed" );
exit( 1 );
}
exit( 0 );
}
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