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2003-04-28  Petur Runolfsson  <peturr02@ru.is>

        PR libstdc++/9523
        * include/bits/ios_base.h (Init::_S_ios_create,
        Init::_S_ios_destroy):  Remove declarations.
        (Init::_S_create_buffers,
        Init::_S_destroy_buffers):  Declare
        * src/ios.cc (Init::_S_ios_create):  Remove
        (Init::_S_create_buffers):  Create buffers and add to streams.
        (Init::_S_ios_destroy):  Rename to...
        (Init::_S_destroy_buffers):  this.
        (Init::Init):  Only construct streams once.
        (Init::~Init):  Flush streams, don't destroy them.
        (ios_base::sync_with_stdio):  Don't destroy streams, only buffers.
        * testsuite/27_io/ios_base/sync_with_stdio/9523.cc:  New test.
        * testsuite/27_io/objects/char/5.cc:  New test.
        * testsuite/27_io/objects/char/5268.cc:  Avoid undefined behavior.
        * testsuite/27_io/objects/char/6.cc:  New test.
        * testsuite/27_io/objects/char/7.cc:  New test.

2003-04-28  Benjamin Kosnik  <bkoz@redhat.com>

        * testsuite/27_io/objects/char/8.cc:  New test.

From-SVN: r66177
This commit is contained in:
Benjamin Kosnik 2003-04-28 17:15:03 +00:00
parent ff4cb2e75b
commit 2aacd7357a
9 changed files with 394 additions and 25 deletions
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24
libstdc++-v3/ChangeLog
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@ -1,3 +1,27 @@
2003-04-28 Petur Runolfsson <peturr02@ru.is>
PR libstdc++/9523
* include/bits/ios_base.h (Init::_S_ios_create,
Init::_S_ios_destroy): Remove declarations.
(Init::_S_create_buffers,
Init::_S_destroy_buffers): Declare
* src/ios.cc (Init::_S_ios_create): Remove
(Init::_S_create_buffers): Create buffers and add to streams.
(Init::_S_ios_destroy): Rename to...
(Init::_S_destroy_buffers): this.
(Init::Init): Only construct streams once.
(Init::~Init): Flush streams, don't destroy them.
(ios_base::sync_with_stdio): Don't destroy streams, only buffers.
* testsuite/27_io/ios_base/sync_with_stdio/9523.cc: New test.
* testsuite/27_io/objects/char/5.cc: New test.
* testsuite/27_io/objects/char/5268.cc: Avoid undefined behavior.
* testsuite/27_io/objects/char/6.cc: New test.
* testsuite/27_io/objects/char/7.cc: New test.
2003-04-28 Benjamin Kosnik <bkoz@redhat.com>
* testsuite/27_io/objects/char/8.cc: New test.
2003-04-28 Benjamin Kosnik <bkoz@redhat.com>
* testsuite/22_locale/codecvt/unicode/char.cc: Remove bom usage.

4
libstdc++-v3/include/bits/ios_base.h
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@ -453,10 +453,10 @@ namespace std
~Init();
static void
_S_ios_create(bool __sync);
_S_create_buffers(bool __sync);
static void
_S_ios_destroy();
_S_destroy_buffers();
// NB: Allows debugger applications use of the standard streams
// from operator new. _S_ios_base_init must be incremented in

78
libstdc++-v3/src/ios.cc
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@ -154,39 +154,34 @@ namespace std
{ return _M_name; }
void
ios_base::Init::_S_ios_create(bool __sync)
ios_base::Init::_S_create_buffers(bool __sync)
{
size_t __out_size = __sync ? 0 : static_cast<size_t>(BUFSIZ);
size_t __in_size = __sync ? 1 : static_cast<size_t>(BUFSIZ);
// NB: The file globals.cc creates the four standard files
// with NULL buffers. At this point, we swap out the dummy NULL
// [io]stream objects and buffers with the real deal.
// Create stream buffers for the standard streams and use those
// buffers without destroying and recreating the streams.
new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out, __out_size);
new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in, __in_size);
new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out, __out_size);
new (&cout) ostream(&buf_cout);
new (&cin) istream(&buf_cin);
new (&cerr) ostream(&buf_cerr);
new (&clog) ostream(&buf_cerr);
cin.tie(&cout);
cerr.flags(ios_base::unitbuf);
cout.rdbuf(&buf_cout);
cin.rdbuf(&buf_cin);
cerr.rdbuf(&buf_cerr);
clog.rdbuf(&buf_cerr);
#ifdef _GLIBCPP_USE_WCHAR_T
new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out, __out_size);
new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in, __in_size);
new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out, __out_size);
new (&wcout) wostream(&buf_wcout);
new (&wcin) wistream(&buf_wcin);
new (&wcerr) wostream(&buf_wcerr);
new (&wclog) wostream(&buf_wcerr);
wcin.tie(&wcout);
wcerr.flags(ios_base::unitbuf);
wcout.rdbuf(&buf_wcout);
wcin.rdbuf(&buf_wcin);
wcerr.rdbuf(&buf_wcerr);
wclog.rdbuf(&buf_wcerr);
#endif
}
void
ios_base::Init::_S_ios_destroy()
ios_base::Init::_S_destroy_buffers()
{
// Explicitly call dtors to free any memory that is dynamically
// allocated by filebuf ctor or member functions, but don't
@ -208,15 +203,52 @@ namespace std
{
// Standard streams default to synced with "C" operations.
ios_base::Init::_S_synced_with_stdio = true;
_S_ios_create(ios_base::Init::_S_synced_with_stdio);
// The standard streams are constructed once only and never destroyed.
// The stream buffers are set in _S_create_buffers below.
new (&cout) ostream(NULL);
new (&cin) istream(NULL);
new (&cerr) ostream(NULL);
new (&clog) ostream(NULL);
cin.tie(&cout);
cerr.flags(ios_base::unitbuf);
#ifdef _GLIBCPP_USE_WCHAR_T
new (&wcout) wostream(NULL);
new (&wcin) wistream(NULL);
new (&wcerr) wostream(NULL);
new (&wclog) wostream(NULL);
wcin.tie(&wcout);
wcerr.flags(ios_base::unitbuf);
#endif
_S_create_buffers(ios_base::Init::_S_synced_with_stdio);
_S_ios_base_init = 1;
}
++_S_ios_base_init;
}
ios_base::Init::~Init()
{
if (--_S_ios_base_init == 0)
_S_ios_destroy();
if (--_S_ios_base_init == 1)
{
// Catch any exceptions thrown by basic_ostream::flush()
try
{
// Flush standard output streams as required by 27.4.2.1.6
cout.flush();
cerr.flush();
clog.flush();
#ifdef _GLIBCPP_USE_WCHAR_T
wcout.flush();
wcerr.flush();
wclog.flush();
#endif
}
catch (...)
{ }
}
}
// 27.4.2.5 ios_base storage functions
@ -355,9 +387,9 @@ namespace std
// currently synchronized.
if (!__sync && __ret)
{
ios_base::Init::_S_synced_with_stdio = false;
ios_base::Init::_S_ios_destroy();
ios_base::Init::_S_ios_create(ios_base::Init::_S_synced_with_stdio);
ios_base::Init::_S_synced_with_stdio = __sync;
ios_base::Init::_S_destroy_buffers();
ios_base::Init::_S_create_buffers(__sync);
}
return __ret;
}

51
libstdc++-v3/testsuite/27_io/ios_base/sync_with_stdio/9523.cc Normal file
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@ -0,0 +1,51 @@
// 2003-04-26 Petur Runolfsson <peturr02@ru.is>
// Copyright (C) 2003 Free Software Foundation
//
// 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.
// 27.4.2.4 ios_base static members
#include <testsuite_hooks.h>
#include <iostream>
// libstdc++/9523
void test01()
{
using namespace std;
int index = ios_base::xalloc();
cin.iword(index) = 5;
cout.iword(index) = 6;
cerr.iword(index) = 7;
clog.iword(index) = 8;
ios_base::sync_with_stdio(false);
VERIFY( cin.iword(index) == 5 );
VERIFY( cout.iword(index) == 6 );
VERIFY( cerr.iword(index) == 7 );
VERIFY( clog.iword(index) == 8 );
}
int main()
{
test01();
return 0;
}

85
libstdc++-v3/testsuite/27_io/objects/char/5.cc Normal file
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@ -0,0 +1,85 @@
// 2003-04-26 Petur Runolfsson <peturr02@ru.is>
// Copyright (C) 2003 Free Software Foundation
//
// 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.
// 27.3 Standard iostream objects
// Check that standard streams can be used from constructors and
// destructors of static objects, provided that an instance of
// ios_base::Init has been constructed.
void init_standard_streams();
int use_standard_streams();
struct Strange
{
int i;
Strange()
{
init_standard_streams();
i = use_standard_streams();
}
~Strange()
{
use_standard_streams();
init_standard_streams();
}
};
static Strange static_ob;
#include <testsuite_hooks.h>
#include <iostream>
void init_standard_streams()
{
std::ios_base::Init init;
}
int use_standard_streams()
{
std::cout << "Hello, world!" << std::endl;
std::cerr << "World, hello!" << std::endl;
int ret = std::ios_base::xalloc();
std::cin.iword(ret) = ret + 1;
std::cout.iword(ret) = ret + 2;
std::cerr.iword(ret) = ret + 3;
std::clog.iword(ret) = ret + 4;
return ret;
}
void test05()
{
bool test = true;
int i = static_ob.i;
VERIFY( std::cin.iword(i) == i + 1 );
VERIFY( std::cout.iword(i) == i + 2 );
VERIFY( std::cerr.iword(i) == i + 3 );
VERIFY( std::clog.iword(i) == i + 4 );
}
int main()
{
test05();
return 0;
}

1
libstdc++-v3/testsuite/27_io/objects/char/5268.cc
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@ -36,6 +36,7 @@ void test04()
std::stringbuf b1;
std::cout.rdbuf( &b1 );
std::cout << "hello\n";
std::cout.rdbuf(NULL);
}
int main()

50
libstdc++-v3/testsuite/27_io/objects/char/6.cc Normal file
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@ -0,0 +1,50 @@
// 2003-04-26 Petur Runolfsson <peturr02@ru.is>
// Copyright (C) 2003 Free Software Foundation
//
// 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.
// 27.3 Standard iostream objects
// ios_base::Init::~Init() calls cout.flush(), which may call
// cout.setstate(badbit), which may throw an exception. Check that
// the exception doesn't escape from the destructor.
#include <iostream>
#include <streambuf>
class Badbuf : public std::streambuf
{
protected:
virtual int sync()
{
return -1;
}
};
void test06()
{
std::ios_base::Init init;
std::cout.rdbuf(new Badbuf);
std::cout.exceptions(std::ios_base::badbit);
}
int main()
{
test06();
return 0;
}

75
libstdc++-v3/testsuite/27_io/objects/char/7.cc Normal file
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@ -0,0 +1,75 @@
// 2003-04-26 Petur Runolfsson <peturr02@ru.is>
// Copyright (C) 2003 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.
// 27.3 Standard iostream objects
#include <fstream>
#include <iostream>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <testsuite_hooks.h>
// Check that cout.flush() is called when last ios_base::Init is destroyed.
void test07()
{
using namespace std;
bool test = true;
const char* name = "tmp_fifo4";
signal(SIGPIPE, SIG_IGN);
unlink(name);
mkfifo(name, S_IRWXU);
int child = fork();
VERIFY( child != -1 );
if (child == 0)
{
filebuf fbout;
sleep(1);
fbout.open(name, ios_base::out);
cout.rdbuf(&fbout);
fbout.sputc('a');
sleep(2);
// NB: fbout is *not* destroyed here!
exit(0);
}
filebuf fbin;
fbin.open(name, ios_base::in);
sleep(2);
filebuf::int_type c = fbin.sbumpc();
VERIFY( c != filebuf::traits_type::eof() );
VERIFY( c == filebuf::traits_type::to_int_type('a') );
fbin.close();
}
int
main()
{
test07();
return 0;
}

51
libstdc++-v3/testsuite/27_io/objects/char/8.cc Normal file
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@ -0,0 +1,51 @@
// 2003-04-28 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2003 Free Software Foundation
//
// 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.
// 27.3 - Standard iostream objects p 2
#include <iostream>
#include <testsuite_hooks.h>
void test02()
{
bool test = true;
// 27.3 - Standard iostream objects p 2
// The objects are not destroyed during program execution.
void* p1 = &std::cout;
void* p2 = &std::cin;
void* p3 = &std::cerr;
void* p4 = &std::clog;
std::ios_base::sync_with_stdio(false);
void* p1s = &std::cout;
void* p2s = &std::cin;
void* p3s = &std::cerr;
void* p4s = &std::clog;
VERIFY( p1 == p1s );
VERIFY( p2 == p2s );
VERIFY( p3 == p3s );
VERIFY( p4 == p4s );
}
int main(void)
{
test02();
return 0;
}