re PR libstdc++/14975 ([3.4 only] Segfault on low-level write error during imbue)

2004-04-16  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/14975
	* include/bits/fstream.tcc (basic_filebuf::imbue): Zero _M_codecvt
	in case of error.
	* testsuite/27_io/basic_filebuf/imbue/char/14975-1.cc: New.
	* testsuite/27_io/basic_filebuf/imbue/wchar_t/14975-2.cc: New.

From-SVN: r80753

4 files changed, 160 insertions, 0 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 9ef62bd..f684655 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,13 @@
 2004-04-16  Paolo Carlini  <pcarlini@suse.de>
 
+	PR libstdc++/14975
+	* include/bits/fstream.tcc (basic_filebuf::imbue): Zero _M_codecvt
+	in case of error.
+	* testsuite/27_io/basic_filebuf/imbue/char/14975-1.cc: New.
+	* testsuite/27_io/basic_filebuf/imbue/wchar_t/14975-2.cc: New.
+
+2004-04-16  Paolo Carlini  <pcarlini@suse.de>
+
 	* acconfig.h: Remove _GLIBCXX_USE_LONG_DOUBLE entry, not
 	used anymore.
 	* config.h.in: Regenerate.
diff --git a/libstdc++-v3/include/bits/fstream.tcc b/libstdc++-v3/include/bits/fstream.tcc
index 19530e7..9f46279 100644
--- a/libstdc++-v3/include/bits/fstream.tcc
+++ b/libstdc++-v3/include/bits/fstream.tcc
@@ -786,6 +786,8 @@ namespace std
 
       if (__testvalid)
 	_M_codecvt = _M_codecvt_tmp;
+      else
+	_M_codecvt = 0;
     }
 
   // Inhibit implicit instantiations for required instantiations,
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/char/14975-1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/char/14975-1.cc
new file mode 100644
index 0000000..0b7369e
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/char/14975-1.cc
@@ -0,0 +1,67 @@
+// 2004-04-16  Petur Runolfsson  <peturr02@ru.is>
+
+// Copyright (C) 2004 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <fstream>
+#include <locale>
+#include <testsuite_hooks.h>
+
+class Buf : public std::filebuf
+{
+protected:
+  virtual int_type
+  overflow(int_type c = traits_type::eof())
+  {
+    return traits_type::eq_int_type(c, traits_type::eof()) ?
+      traits_type::eof() : std::filebuf::overflow(c);
+  }
+};
+
+// libstdc++/14975
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  Buf fb;
+  locale loc_us = __gnu_test::try_named_locale("en_US");
+  fb.pubimbue(loc_us);
+  fb.open("tmp_14975-1", ios_base::out);
+  
+  try
+    {
+      fb.sputc('a');
+      fb.sputc('b');
+      fb.pubimbue(locale::classic());
+      fb.sputc('c');
+      fb.pubsync();
+      fb.close();
+    }
+  catch (std::exception&)
+    {
+    }
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/wchar_t/14975-2.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/wchar_t/14975-2.cc
new file mode 100644
index 0000000..8789b9a
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/wchar_t/14975-2.cc
@@ -0,0 +1,83 @@
+// 2004-04-16  Petur Runolfsson  <peturr02@ru.is>
+
+// Copyright (C) 2004 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+#include <fstream>
+#include <locale>
+#include <unistd.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <testsuite_hooks.h>
+
+// libstdc++/14975
+void test01()
+{
+  using namespace std;
+  using namespace __gnu_test;
+  bool test __attribute__((unused)) = true;
+
+  locale loc_us = try_named_locale("en_US");
+
+  const char* name = "tmp_14975-2";
+
+  signal(SIGPIPE, SIG_IGN);
+
+  unlink(name);  
+  try_mkfifo(name, S_IRWXU);
+  
+  int child = fork();
+  VERIFY( child != -1 );
+
+  if (child == 0)
+    {
+      filebuf fbin;
+      fbin.open(name, ios_base::in);
+      sleep(2);
+      exit(0);
+    }
+  
+  wfilebuf fb;
+  fb.pubimbue(loc_us);
+  sleep(1);
+  wfilebuf* ret = fb.open(name, ios_base::out);
+  VERIFY( ret != NULL );
+  VERIFY( fb.is_open() );
+
+  sleep(3);
+
+  try
+    {
+      fb.sputc(L'a');
+      fb.sputc(L'b');
+      fb.pubimbue(locale::classic());
+      fb.sputc(L'c');
+      fb.close();
+    }
+  catch (std::exception&)
+    {
+    }
+}
+
+int main()
+{
+  test01();
+  return 0;
+}