PR libstdc++/85222 allow catching iostream errors as gcc4-compatible ios::failure

Define a new exception type derived from std::ios::failure[abi:cxx11]
which also aggregates an object of the gcc4-compatible ios::failure
type. Make __throw_ios_failure throw this new type for iostream errors
that raise exceptions. Provide custom type info for the new type so that
it can be caught by handlers for the gcc4-compatible ios::failure type
as well as handlers for ios::failure[abi:cxx11] and its bases.

	PR libstdc++/85222
	* src/c++11/Makefile.am [ENABLE_DUAL_ABI]: Add special rules for
	cxx11-ios_failure.cc to rewrite type info for __ios_failure.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++11/cxx11-ios_failure.cc (__ios_failure, __iosfail_type_info):
	New types.
	[_GLIBCXX_USE_DUAL_ABI] (__throw_ios_failure): Define here.
	* src/c++11/ios.cc (__throw_ios_failure): Remove definition.
	* src/c++98/ios_failure.cc (__construct_ios_failure)
	(__destroy_ios_failure, is_ios_failure_handler): New functions.
	[!_GLIBCXX_USE_DUAL_ABI] (__throw_ios_failure): Define here.
	* testsuite/27_io/ios_base/failure/dual_abi.cc: New.
	* testsuite/27_io/basic_ios/copyfmt/char/1.cc: Revert changes to
	handler types, to always catch std::ios_base::failure.
	* testsuite/27_io/basic_ios/exceptions/char/1.cc: Likewise.
	* testsuite/27_io/basic_istream/extractors_arithmetic/char/
	exceptions_failbit.cc: Likewise.
	* testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/
	exceptions_failbit.cc: Likewise.
	* testsuite/27_io/basic_istream/extractors_other/char/
	exceptions_null.cc: Likewise.
	* testsuite/27_io/basic_istream/extractors_other/wchar_t/
	exceptions_null.cc: Likewise.
	* testsuite/27_io/basic_istream/sentry/char/12297.cc: Likewise.
	* testsuite/27_io/basic_istream/sentry/wchar_t/12297.cc: Likewise.
	* testsuite/27_io/basic_ostream/inserters_other/char/
	exceptions_null.cc: Likewise.
	* testsuite/27_io/basic_ostream/inserters_other/wchar_t/
	exceptions_null.cc: Likewise.
	* testsuite/27_io/ios_base/storage/2.cc: Likewise.

From-SVN: r259281

6 files changed, 6 insertions, 48 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/exceptions_failbit.cc b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/exceptions_failbit.cc
index bf96bba..584c278 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/exceptions_failbit.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/exceptions_failbit.cc
@@ -27,20 +27,13 @@ void test_failbit()
   istringstream stream("jaylib - champion sound");
   stream.exceptions(ios_base::failbit);
 
-  // The library throws the new definition of std::ios::failure
-#if _GLIBCXX_USE_CXX11_ABI
-    typedef std::ios_base::failure exception_type;
-#else
-    typedef std::exception exception_type;
-#endif
-
   try
     {
       T i;
       stream >> i;
       VERIFY( false );
     }
-  catch (const exception_type&)
+  catch (const std::ios_base::failure&)
     {
       // stream should set failbit and throw ios_base::failure.
       VERIFY( stream.fail() );
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/exceptions_failbit.cc b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/exceptions_failbit.cc
index 4883d63..ca0e8b1 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/exceptions_failbit.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/exceptions_failbit.cc
@@ -27,20 +27,13 @@ void test_failbit()
   wistringstream stream(L"jaylib - champion sound");
   stream.exceptions(ios_base::failbit);
 
-  // The library throws the new definition of std::ios::failure
-#if _GLIBCXX_USE_CXX11_ABI
-    typedef std::ios_base::failure exception_type;
-#else
-    typedef std::exception exception_type;
-#endif
-
   try
     {
       T i;
       stream >> i;
       VERIFY( false );
     }
-  catch (const exception_type&)
+  catch (const std::ios_base::failure&)
     {
       // stream should set failbit and throw ios_base::failure.
       VERIFY( stream.fail() );
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/char/exceptions_null.cc b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/char/exceptions_null.cc
index 5133b40..498ab21 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/char/exceptions_null.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/char/exceptions_null.cc
@@ -35,19 +35,12 @@ void test4()
   istringstream stream;
   stream.exceptions(ios_base::failbit);
 
-  // The library throws the new definition of std::ios::failure
-#if _GLIBCXX_USE_CXX11_ABI
-    typedef std::ios_base::failure exception_type;
-#else
-    typedef std::exception exception_type;
-#endif
-
   try
     {
       stream >> static_cast<streambuf*>(0);
       VERIFY(false);
     }
-  catch (exception_type&)
+  catch (std::ios_base::failure&)
     {
     }
 
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/exceptions_null.cc b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/exceptions_null.cc
index 05fedd0..0c10ec6 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/exceptions_null.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/exceptions_null.cc
@@ -35,19 +35,12 @@ void test4()
   wistringstream stream;
   stream.exceptions(ios_base::failbit);
 
-  // The library throws the new definition of std::ios::failure
-#if _GLIBCXX_USE_CXX11_ABI
-    typedef std::ios_base::failure exception_type;
-#else
-    typedef std::exception exception_type;
-#endif
-
   try
     {
       stream >> static_cast<wstreambuf*>(0);
       VERIFY( false );
     }
-  catch (exception_type&)
+  catch (std::ios_base::failure&)
     {
     }
 
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/sentry/char/12297.cc b/libstdc++-v3/testsuite/27_io/basic_istream/sentry/char/12297.cc
index a5a2dfb..c808cb7 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/sentry/char/12297.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/sentry/char/12297.cc
@@ -26,19 +26,12 @@ int main()
   istringstream stream;
   stream.exceptions(ios_base::eofbit);
 
-  // The library throws the new definition of std::ios::failure
-#if _GLIBCXX_USE_CXX11_ABI
-    typedef std::ios_base::failure exception_type;
-#else
-    typedef std::exception exception_type;
-#endif
-
   try
     {
       istream::sentry sentry(stream, false);
       VERIFY( false );
     }
-  catch (exception_type&)
+  catch (std::ios_base::failure&)
     {
       VERIFY( stream.rdstate() == (ios_base::eofbit | ios_base::failbit) );
     }
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/sentry/wchar_t/12297.cc b/libstdc++-v3/testsuite/27_io/basic_istream/sentry/wchar_t/12297.cc
index ec7ed9a..a5e03ae 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/sentry/wchar_t/12297.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/sentry/wchar_t/12297.cc
@@ -26,19 +26,12 @@ int main()
   wistringstream stream;
   stream.exceptions(ios_base::eofbit);
 
-  // The library throws the new definition of std::ios::failure
-#if _GLIBCXX_USE_CXX11_ABI
-    typedef std::ios_base::failure exception_type;
-#else
-    typedef std::exception exception_type;
-#endif
-
   try
     {
       wistream::sentry sentry(stream, false);
       VERIFY( false );
     }
-  catch (exception_type&)
+  catch (std::ios_base::failure&)
     {
       VERIFY( stream.rdstate() == (ios_base::eofbit | ios_base::failbit) );
     }