From d4522b8e9854178473adcea0fbb84f23f6e744bd Mon Sep 17 00:00:00 2001 From: Felipe Boeira Date: Tue, 8 Jan 2019 18:39:03 +0100 Subject: Initial commit --- src/tests/vm/mmap-over-data.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/tests/vm/mmap-over-data.c (limited to 'src/tests/vm/mmap-over-data.c') diff --git a/src/tests/vm/mmap-over-data.c b/src/tests/vm/mmap-over-data.c new file mode 100644 index 0000000..9ea5d49 --- /dev/null +++ b/src/tests/vm/mmap-over-data.c @@ -0,0 +1,21 @@ +/* Verifies that mapping over the data segment is disallowed. */ + +#include +#include +#include +#include "tests/lib.h" +#include "tests/main.h" + +static char x; + +void +test_main (void) +{ + uintptr_t x_page = ROUND_DOWN ((uintptr_t) &x, 4096); + int handle; + + CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\""); + CHECK (mmap (handle, (void *) x_page) == MAP_FAILED, + "try to mmap over data segment"); +} + -- cgit v1.2.1