Add UnixAPIChecker, a meta checker to include various precondition checks for calls

to various unix/posix functions, e.g. 'open()'.

As a first check, check that when 'open()' is passed 'O_CREAT' that it has
a third argument.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97086 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/test/Analysis/unix-fns.c b/test/Analysis/unix-fns.c
new file mode 100644
index 0000000000..2bc2efa2d7
--- /dev/null
+++ b/test/Analysis/unix-fns.c
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -analyze -analyzer-check-objc-mem %s -analyzer-store=region
+// RUN: %clang_cc1 -analyze -analyzer-check-objc-mem %s -analyzer-store=basic
+
+#include <fcntl.h>
+
+void test_open(const char *path) {
+  int fd;
+  fd = open(path, O_RDONLY); // no-warning
+  if (!fd)
+    close(fd);
+
+  fd = open(path, O_CREAT); // expected-warning{{Call to 'open' requires a third argument when the 'O_CREAT' flag is set}}
+  if (!fd)
+    close(fd);
+}