Bug 1569681: Part 2 - Add new clang-plugin tests for moz_static_local_class and moz_trivial_destructor attributes; r=Ehsan

These tests are based on `moz_global_class` and `moz_trivial_ctor_dtor` tests,
respectively, but adapted for the semantics of the new attributes.

Differential Revision: https://phabricator.services.mozilla.com/D39718

--HG--
rename : build/clang-plugin/tests/TestGlobalClass.cpp => build/clang-plugin/tests/TestStaticLocalClass.cpp
rename : build/clang-plugin/tests/TestTrivialCtorDtor.cpp => build/clang-plugin/tests/TestTrivialDtor.cpp
extra : moz-landing-system : lando

build/clang-plugin/tests/TestStaticLocalClass.cpp

@@ -0,0 +1,54 @@
+#define MOZ_STATIC_LOCAL_CLASS __attribute__((annotate("moz_static_local_class")))
+#include <stddef.h>
+
+struct MOZ_STATIC_LOCAL_CLASS StaticLocal {
+  int i;
+  void *operator new(size_t x) throw() { return 0; }
+  void *operator new(size_t blah, char *buffer) { return buffer; }
+};
+
+template <class T>
+struct MOZ_STATIC_LOCAL_CLASS TemplateClass {
+  T i;
+};
+
+void gobble(void *) { }
+
+void misuseStaticLocalClass(int len) {
+  StaticLocal notValid; // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated in an automatic variable}}
+  StaticLocal alsoNotValid[2]; // expected-error {{variable of type 'StaticLocal [2]' is only valid as a static local}} expected-note {{'StaticLocal [2]' is a static local type because it is an array of static local type 'StaticLocal'}} expected-note {{value incorrectly allocated in an automatic variable}}
+  static StaticLocal valid;
+  static StaticLocal alsoValid[2];
+
+  gobble(&notValid);
+  gobble(&valid);
+  gobble(&alsoValid[0]);
+
+  gobble(new StaticLocal); // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated on the heap}}
+  gobble(new StaticLocal[10]); // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated on the heap}}
+  gobble(new TemplateClass<int>); // expected-error {{variable of type 'TemplateClass<int>' is only valid as a static local}} expected-note {{value incorrectly allocated on the heap}}
+  gobble(len <= 5 ? &valid : new StaticLocal); // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated on the heap}}
+
+  char buffer[sizeof(StaticLocal)];
+  gobble(new (buffer) StaticLocal);
+}
+
+StaticLocal notValid; // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated in a global variable}}
+
+struct RandomClass {
+  StaticLocal nonstaticMember; // expected-note {{'RandomClass' is a static local type because member 'nonstaticMember' is a static local type 'StaticLocal'}}
+  static StaticLocal staticMember; // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated in a global variable}}
+};
+
+struct MOZ_STATIC_LOCAL_CLASS RandomStaticLocalClass {
+  StaticLocal nonstaticMember;
+  static StaticLocal staticMember; // expected-error {{variable of type 'StaticLocal' is only valid as a static local}} expected-note {{value incorrectly allocated in a global variable}}
+};
+
+struct BadInherit : StaticLocal {}; // expected-note {{'BadInherit' is a static local type because it inherits from a static local type 'StaticLocal'}}
+struct MOZ_STATIC_LOCAL_CLASS GoodInherit : StaticLocal {};
+
+void misuseStaticLocalClassEvenMore(int len) {
+  BadInherit moreInvalid; // expected-error {{variable of type 'BadInherit' is only valid as a static local}} expected-note {{value incorrectly allocated in an automatic variable}}
+  RandomClass evenMoreInvalid; // expected-error {{variable of type 'RandomClass' is only valid as a static local}} expected-note {{value incorrectly allocated in an automatic variable}}
+}

build/clang-plugin/tests/TestTrivialDtor.cpp

@@ -0,0 +1,53 @@
+#define MOZ_TRIVIAL_DTOR __attribute__((annotate("moz_trivial_dtor")))
+
+struct MOZ_TRIVIAL_DTOR EmptyClass{};
+
+template <class T>
+struct MOZ_TRIVIAL_DTOR TemplateEmptyClass{};
+
+struct MOZ_TRIVIAL_DTOR NonEmptyClass {
+  void *m;
+};
+
+template <class T>
+struct MOZ_TRIVIAL_DTOR TemplateNonEmptyClass {
+  T* m;
+};
+
+struct MOZ_TRIVIAL_DTOR BadUserDefinedDtor { // expected-error {{class 'BadUserDefinedDtor' must have a trivial destructor}}
+  ~BadUserDefinedDtor() {}
+};
+
+struct MOZ_TRIVIAL_DTOR BadVirtualDtor { // expected-error {{class 'BadVirtualDtor' must have a trivial destructor}}
+  virtual ~BadVirtualDtor() {}
+};
+
+struct MOZ_TRIVIAL_DTOR OkVirtualMember {
+  virtual void f();
+};
+
+void foo();
+struct MOZ_TRIVIAL_DTOR BadNonEmptyCtorDtor { // expected-error {{class 'BadNonEmptyCtorDtor' must have a trivial destructor}}
+  BadNonEmptyCtorDtor() { foo(); }
+  ~BadNonEmptyCtorDtor() { foo(); }
+};
+
+struct NonTrivialDtor {
+  ~NonTrivialDtor() { foo(); }
+};
+
+struct VirtualMember {
+  virtual void f();
+};
+
+struct MOZ_TRIVIAL_DTOR BadNonTrivialDtorInBase : NonTrivialDtor { // expected-error {{class 'BadNonTrivialDtorInBase' must have a trivial destructor}}
+};
+
+struct MOZ_TRIVIAL_DTOR BadNonTrivialDtorInMember { // expected-error {{class 'BadNonTrivialDtorInMember' must have a trivial destructor}}
+  NonTrivialDtor m;
+};
+
+struct MOZ_TRIVIAL_DTOR OkVirtualMemberInMember {
+  VirtualMember m;
+};
+

build/clang-plugin/tests/moz.build

@@ -43,8 +43,10 @@ SOURCES += [
     'TestRefCountedCopyConstructor.cpp',
     'TestSprintfLiteral.cpp',
     'TestStackClass.cpp',
+    'TestStaticLocalClass.cpp',
     'TestTemporaryClass.cpp',
     'TestTrivialCtorDtor.cpp',
+    'TestTrivialDtor.cpp',
 ]
 
 if CONFIG['OS_ARCH'] == 'WINNT':