[analyzer] Track null/uninitialized C++ objects used in method calls.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161278 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 36 insertions, 0 deletions

diff --git a/test/Analysis/method-call-path-notes.cpp b/test/Analysis/method-call-path-notes.cpp
new file mode 100644
index 0000000000..1e17b838cc
--- /dev/null
+++ b/test/Analysis/method-call-path-notes.cpp
@@ -0,0 +1,36 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-ipa=inlining -analyzer-output=text -verify %s
+
+// Test warning about null or uninitialized pointer values used as instance member
+// calls.
+class TestInstanceCall {
+public:
+  void foo() {}
+};
+
+void test_ic() {
+  TestInstanceCall *p; // expected-note {{Variable 'p' declared without an initial value}}
+  p->foo(); // expected-warning {{Called C++ object pointer is uninitialized}} expected-note {{Called C++ object pointer is uninitialized}}
+}
+
+void test_ic_null() {
+  TestInstanceCall *p = 0; // expected-note {{Variable 'p' initialized to a null pointer value}}
+  p->foo(); // expected-warning {{Called C++ object pointer is null}} expected-note {{Called C++ object pointer is null}}
+}
+
+void test_ic_set_to_null() {
+  TestInstanceCall *p;
+  p = 0; // expected-note {{Null pointer value stored to 'p'}}
+  p->foo(); // expected-warning {{Called C++ object pointer is null}} expected-note {{Called C++ object pointer is null}}
+}
+
+void test_ic_null(TestInstanceCall *p) {
+  if (!p) // expected-note {{Taking true branch}}
+    p->foo(); // expected-warning {{Called C++ object pointer is null}} expected-note{{Called C++ object pointer is null}}
+}
+
+void test_ic_member_ptr() {
+  TestInstanceCall *p = 0; // expected-note {{Variable 'p' initialized to a null pointer value}}
+  typedef void (TestInstanceCall::*IC_Ptr)();
+  IC_Ptr bar = &TestInstanceCall::foo;
+  (p->*bar)(); // expected-warning {{Called C++ object pointer is null}} expected-note{{Called C++ object pointer is null}}
+}