diff --git a/src/tests/vm/mmap-inherit.c b/src/tests/vm/mmap-inherit.c new file mode 100644 index 0000000000000000000000000000000000000000..7fa9607c41f78c495e75d2a8be30be9647d7e7b5 --- /dev/null +++ b/src/tests/vm/mmap-inherit.c @@ -0,0 +1,32 @@ +/* Maps a file into memory and runs child-inherit to verify that + mappings are not inherited. */ + +#include <string.h> +#include <syscall.h> +#include "tests/vm/sample.inc" +#include "tests/lib.h" +#include "tests/main.h" + +void +test_main (void) +{ + char *actual = (char *) 0x54321000; + int handle; + pid_t child; + + /* Open file, map, verify data. */ + CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\""); + CHECK (mmap (handle, actual) != MAP_FAILED, "mmap \"sample.txt\""); + if (memcmp (actual, sample, strlen (sample))) + fail ("read of mmap'd file reported bad data"); + + /* Spawn child and wait. */ + CHECK ((child = exec ("child-inherit")) != -1, "exec \"child-inherit\""); + quiet = true; + CHECK (wait (child) == -1, "wait for child (should return -1)"); + quiet = false; + + /* Verify data again. */ + CHECK (!memcmp (actual, sample, strlen (sample)), + "checking that mmap'd file still has same data"); +}