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OS/pintos-env/pintos/tests/userprog/bad-read.c

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/* This program attempts to read memory at an address that is not mapped.
This should terminate the process with a -1 exit code. */
#include "tests/lib.h"
#include "tests/main.h"
void
test_main (void)
{
msg ("Congratulations - you have successfully dereferenced NULL: %d",
*(int *)NULL);
fail ("should have exited with -1");
}