1 files changed, 72 insertions, 0 deletions
diff --git a/build/clang-plugin/tests/TestTemporaryClass.cpp b/build/clang-plugin/tests/TestTemporaryClass.cpp
new file mode 100644
index 0000000000..e7f1e0ee7c
--- /dev/null
+++ b/build/clang-plugin/tests/TestTemporaryClass.cpp
@@ -0,0 +1,72 @@
+#define MOZ_TEMPORARY_CLASS __attribute__((annotate("moz_temporary_class")))
+#define MOZ_IMPLICIT __attribute__((annotate("moz_implicit")))
+
+#include <stddef.h>
+
+struct MOZ_TEMPORARY_CLASS Temporary {
+  int i;
+  Temporary() {}
+  MOZ_IMPLICIT Temporary(int a) {}
+  Temporary(int a, int b) {}
+  void *operator new(size_t x) throw() { return 0; }
+  void *operator new(size_t blah, char *buffer) { return buffer; }
+};
+
+template <class T>
+struct MOZ_TEMPORARY_CLASS TemplateClass {
+  T i;
+};
+
+void gobble(void *) { }
+
+void gobbleref(const Temporary&) { }
+
+template <class T>
+void gobbleanyref(const T&) { }
+
+void misuseNonTemporaryClass(int len) {
+  // All of these should error.
+  Temporary invalid; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in an automatic variable}}
+  Temporary alsoInvalid[2]; // expected-error {{variable of type 'Temporary [2]' is only valid as a temporary}} expected-note {{value incorrectly allocated in an automatic variable}} expected-note {{'Temporary [2]' is a temporary type because it is an array of temporary type 'Temporary'}}
+  static Temporary invalidStatic; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}}
+  static Temporary alsoInvalidStatic[2]; // expected-error {{variable of type 'Temporary [2]' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}} expected-note {{'Temporary [2]' is a temporary type because it is an array of temporary type 'Temporary'}}
+
+  gobble(&invalid);
+  gobble(&invalidStatic);
+  gobble(&alsoInvalid[0]);
+
+  // All of these should be fine.
+  gobbleref(Temporary());
+  gobbleref(Temporary(10, 20));
+  gobbleref(Temporary(10));
+  gobbleref(10);
+  gobbleanyref(TemplateClass<int>());
+
+  // All of these should error.
+  gobble(new Temporary); // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
+  gobble(new Temporary[10]); // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
+  gobble(new TemplateClass<int>); // expected-error {{variable of type 'TemplateClass<int>' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
+  gobble(len <= 5 ? &invalid : new Temporary); // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
+
+  // Placement new is odd, but okay.
+  char buffer[sizeof(Temporary)];
+  gobble(new (buffer) Temporary);
+}
+
+void defaultArg(const Temporary& arg = Temporary()) { // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in an automatic variable}}
+}
+
+// Can't be a global, this should error.
+Temporary invalidStatic; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}}
+
+struct RandomClass {
+  Temporary nonstaticMember; // This is okay if RandomClass is only used as a temporary.
+  static Temporary staticMember; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}}
+};
+
+struct BadInherit : Temporary {};
+
+void useStuffWrongly() {
+  gobbleanyref(BadInherit());
+  gobbleanyref(RandomClass());
+}