1 files changed, 35 insertions, 0 deletions
diff --git a/test/Analysis/null-deref-static.m b/test/Analysis/null-deref-static.m
new file mode 100644
index 000000000000..887bea252390
--- /dev/null
+++ b/test/Analysis/null-deref-static.m
@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 -w -fblocks -analyze -analyzer-checker=core,deadcode,alpha.core,debug.ExprInspection -verify %s
+
+void *malloc(unsigned long);
+void clang_analyzer_warnIfReached();
+
+void test_static_from_block() {
+  static int *x;
+  ^{
+    *x; // no-warning
+  };
+}
+
+void test_static_within_block() {
+  ^{
+    static int *x;
+    *x; // expected-warning{{Dereference of null pointer}}
+  };
+}
+
+void test_static_control_flow(int y) {
+  static int *x;
+  if (x) {
+    // FIXME: Should be reachable.
+    clang_analyzer_warnIfReached(); // no-warning
+  }
+  if (y) {
+    // We are not sure if this branch is possible, because the developer
+    // may argue that function is always called with y == 1 for the first time.
+    // In this case, we can only advise the developer to add assertions
+    // for suppressing such path.
+    *x; // expected-warning{{Dereference of null pointer}}
+  } else {
+    x = malloc(1);
+  }
+}