1 files changed, 73 insertions, 0 deletions
diff --git a/test/mmap/mmap.c b/test/mmap/mmap.c
new file mode 100644
index 0000000..8b29737
--- /dev/null
+++ b/test/mmap/mmap.c
@@ -0,0 +1,73 @@
+
+/* The mmap test is useful, since syscalls with 6 arguments
+ * (as mmap) are done differently on various architectures.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#define SIZEOF_ARRAY(type) (sizeof(type)/sizeof(*type))
+
+struct mmap_test {
+	void *ret;
+	int err;
+	struct {
+		void *start;
+		size_t length;
+		int prot;
+		int flags;
+		int fd;
+		off_t offset;
+	} args;
+};
+
+struct mmap_test tests[] = {
+	[0] {
+		.err = 0,
+		.args.start = NULL,
+		.args.length = 4096,
+		.args.prot = PROT_READ|PROT_WRITE,
+		.args.flags = MAP_PRIVATE|MAP_ANONYMOUS,
+		.args.fd = 0,
+		.args.offset = 0
+	},
+};
+
+#define err(fmt, args...) \
+	do { \
+		fprintf(stderr, fmt "\n" , ## args); \
+		exit(1); \
+	} while (0)
+#define errp(fmt, args...) err(fmt ": %s" , ## args , strerror(errno))
+
+int main(int argc, char **argv)
+{
+	int i;
+	struct mmap_test *t;
+
+	for (i=0; i<SIZEOF_ARRAY(tests); ++i) {
+		t = tests + i;
+
+		errno = 0;
+		t->ret = mmap(t->args.start, t->args.length, t->args.prot,
+		              t->args.flags, t->args.fd, t->args.offset);
+
+		if (t->err) {
+			if (t->ret != MAP_FAILED)
+				err("mmap test %i should have failed, but gave us %p", i, t->ret);
+			else if (t->err != errno)
+				errp("mmap test %i failed, but gave us wrong errno (got %i instead of %i)", i, errno, t->err);
+		} else {
+			if (t->ret == MAP_FAILED)
+				errp("mmap test %i failed", i);
+			else if (munmap(t->ret, t->args.length) != 0)
+				errp("munmap test %i failed", i);
+		}
+	}
+
+	exit(0);
+}