diff options
Diffstat (limited to 'gcc48-pr81395.patch')
| -rw-r--r-- | gcc48-pr81395.patch | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/gcc48-pr81395.patch b/gcc48-pr81395.patch new file mode 100644 index 0000000..b99fb74 --- /dev/null +++ b/gcc48-pr81395.patch @@ -0,0 +1,67 @@ +2017-07-18 Jonathan Wakely <jwakely@redhat.com> + + PR libstdc++/81395 + * include/bits/fstream.tcc (basic_filebuf::xsgetn): Don't set buffer + pointers for write mode after reading. + * testsuite/27_io/basic_filebuf/sgetn/char/81395.cc: New. + +--- libstdc++-v3/include/bits/fstream.tcc (revision 254017) ++++ libstdc++-v3/include/bits/fstream.tcc (revision 254018) +@@ -699,7 +699,7 @@ + + if (__n == 0) + { +- _M_set_buffer(0); ++ // Set _M_reading. Buffer is already in initial 'read' mode. + _M_reading = true; + } + else if (__len == 0) +--- libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/81395.cc (nonexistent) ++++ libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/81395.cc (revision 254018) +@@ -0,0 +1,46 @@ ++// Copyright (C) 2017 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 3, 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 COPYING3. If not see ++// <http://www.gnu.org/licenses/>. ++ ++// { dg-require-fileio "" } ++ ++// PR libstdc++/81395 ++ ++#include <fstream> ++#include <cstring> // for std::memset ++#include <cstdio> // For BUFSIZ ++ ++using std::memset; ++ ++int main() ++{ ++ { ++ std::filebuf fb; ++ fb.open("test.txt", std::ios::out); ++ char data[BUFSIZ]; ++ memset(data, 'A', sizeof(data)); ++ fb.sputn(data, sizeof(data)); ++ } ++ ++ std::filebuf fb; ++ fb.open("test.txt", std::ios::in|std::ios::out); ++ char buf[BUFSIZ]; ++ memset(buf, 0, sizeof(buf)); ++ fb.sgetn(buf, sizeof(buf)); ++ // Switch from reading to writing without seeking first: ++ fb.sputn("B", 1); ++ fb.pubsync(); ++} |