Recommit r256322: Fix PR25898 - Check for incomplete pointers types in can_catch(...)

This patch re-commits r256322 and r256323. They were reverted due to a OS X
test failure. The test failure has been fixed by libc++ commit r258217.

This patch also adds some additional tests.


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@258249 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 172 insertions, 0 deletions

diff --git a/test/incomplete_type.sh.cpp b/test/incomplete_type.sh.cpp
new file mode 100644
index 0000000..cd49ece
--- /dev/null
+++ b/test/incomplete_type.sh.cpp
@@ -0,0 +1,172 @@
+//===------------------------- incomplete_type.cpp --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// http://mentorembedded.github.io/cxx-abi/abi.html#rtti-layout
+
+// Two abi::__pbase_type_info objects can always be compared for equality
+// (i.e. of the types represented) or ordering by comparison of their name
+// NTBS addresses. In addition, unless either or both have either of the
+// incomplete flags set, equality can be tested by comparing the type_info
+// addresses.
+
+// RUN: %cxx %flags %compile_flags -c %s -o %t.one.o
+// RUN: %cxx %flags %compile_flags -c %s -o %t.two.o -DTU_ONE
+// RUN: %cxx %flags %link_flags -o %t.exe %t.one.o %t.two.o
+// RUN: %exec %t.exe
+
+#include <stdio.h>
+#include <cstring>
+#include <cassert>
+#include <typeinfo>
+
+// Check that the addresses of the typeinfo differ but still compare equal
+// via their NTBS.
+inline void
+AssertIncompleteTypeInfoEquals(std::type_info const& LHS, std::type_info const& RHS)
+{
+  assert(&LHS != &RHS);
+  assert(strcmp(LHS.name(), RHS.name()) == 0);
+}
+
+struct NeverDefined;
+void ThrowNeverDefinedMP();
+std::type_info const& ReturnTypeInfoNeverDefinedMP();
+
+struct IncompleteAtThrow;
+void ThrowIncompleteMP();
+void ThrowIncompletePP();
+void ThrowIncompletePMP();
+std::type_info const& ReturnTypeInfoIncompleteMP();
+std::type_info const& ReturnTypeInfoIncompletePP();
+
+struct CompleteAtThrow;
+void ThrowCompleteMP();
+void ThrowCompletePP();
+void ThrowCompletePMP();
+std::type_info const& ReturnTypeInfoCompleteMP();
+std::type_info const& ReturnTypeInfoCompletePP();
+
+void ThrowNullptr();
+
+#ifndef TU_ONE
+
+void ThrowNeverDefinedMP() { throw (int NeverDefined::*)nullptr; }
+std::type_info const& ReturnTypeInfoNeverDefinedMP() { return typeid(int NeverDefined::*); }
+
+void ThrowIncompleteMP() { throw (int IncompleteAtThrow::*)nullptr; }
+void ThrowIncompletePP() { throw (IncompleteAtThrow**)nullptr; }
+void ThrowIncompletePMP() { throw (int IncompleteAtThrow::**)nullptr; }
+std::type_info const& ReturnTypeInfoIncompleteMP() { return typeid(int IncompleteAtThrow::*); }
+std::type_info const& ReturnTypeInfoIncompletePP() { return typeid(IncompleteAtThrow**); }
+
+struct CompleteAtThrow {};
+void ThrowCompleteMP() { throw (int CompleteAtThrow::*)nullptr; }
+void ThrowCompletePP() { throw (CompleteAtThrow**)nullptr; }
+void ThrowCompletePMP() { throw (int CompleteAtThrow::**)nullptr; }
+std::type_info const& ReturnTypeInfoCompleteMP() { return typeid(int CompleteAtThrow::*); }
+std::type_info const& ReturnTypeInfoCompletePP() { return typeid(CompleteAtThrow**); }
+
+void ThrowNullptr() { throw nullptr; }
+
+#else
+
+struct IncompleteAtThrow {};
+
+int main() {
+  AssertIncompleteTypeInfoEquals(ReturnTypeInfoNeverDefinedMP(), typeid(int NeverDefined::*));
+  try {
+    ThrowNeverDefinedMP();
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {
+    assert(false);
+  } catch (int CompleteAtThrow::*) {
+    assert(false);
+  } catch (int NeverDefined::*) {}
+  AssertIncompleteTypeInfoEquals(ReturnTypeInfoIncompleteMP(), typeid(int IncompleteAtThrow::*));
+  try {
+    ThrowIncompleteMP();
+    assert(false);
+  } catch (CompleteAtThrow**) {
+    assert(false);
+  } catch (int CompleteAtThrow::*) {
+    assert(false);
+  } catch (IncompleteAtThrow**) {
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {}
+
+  AssertIncompleteTypeInfoEquals(ReturnTypeInfoIncompletePP(), typeid(IncompleteAtThrow**));
+  try {
+    ThrowIncompletePP();
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {
+    assert(false);
+  } catch (IncompleteAtThrow**) {}
+
+  try {
+    ThrowIncompletePMP();
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {
+    assert(false);
+  } catch (IncompleteAtThrow**) {
+    assert(false);
+  } catch (int IncompleteAtThrow::**) {}
+
+  AssertIncompleteTypeInfoEquals(ReturnTypeInfoCompleteMP(), typeid(int CompleteAtThrow::*));
+  try {
+    ThrowCompleteMP();
+    assert(false);
+  } catch (IncompleteAtThrow**) {
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {
+    assert(false);
+  } catch (CompleteAtThrow**) {
+    assert(false);
+  } catch (int CompleteAtThrow::*) {}
+
+  AssertIncompleteTypeInfoEquals(ReturnTypeInfoCompletePP(), typeid(CompleteAtThrow**));
+  try {
+    ThrowCompletePP();
+    assert(false);
+  } catch (IncompleteAtThrow**) {
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {
+    assert(false);
+  } catch (int CompleteAtThrow::*) {
+    assert(false);
+  } catch (CompleteAtThrow**) {}
+
+  try {
+    ThrowCompletePMP();
+    assert(false);
+  } catch (IncompleteAtThrow**) {
+    assert(false);
+  } catch (int IncompleteAtThrow::*) {
+    assert(false);
+  } catch (int CompleteAtThrow::*) {
+    assert(false);
+  } catch (CompleteAtThrow**) {
+    assert(false);
+  } catch (int CompleteAtThrow::**) {}
+
+#if __cplusplus >= 201103L
+  // Catch nullptr as complete type
+  try {
+    ThrowNullptr();
+  } catch (int IncompleteAtThrow::*) {}
+
+  // Catch nullptr as an incomplete type
+  try {
+    ThrowNullptr();
+  } catch (int CompleteAtThrow::*) {}
+  // Catch nullptr as a type that is never complete.
+  try {
+    ThrowNullptr();
+  } catch (int NeverDefined::*) {}
+#endif
+}
+#endif