Eric Fiselier a30cee2258 Make system_error::message() thread safe. Fixes PR25598. ...

Summary:
system_error::message() uses `strerror` for the generic and system categories. This function is not thread safe.

The fix is to use `strerror_r`. It has been available since 2001 for GNU libc and since BSD 4.4 on FreeBSD/OS X.
On platforms with GNU libc the extended version is used which always returns a valid string, even if an error occurs.

In single-threaded builds `strerror` is still used.

See https://llvm.org/bugs/show_bug.cgi?id=25598

Reviewers: majnemer, mclow.lists

Subscribers: erik65536, cfe-commits, emaste

Differential Revision: http://reviews.llvm.org/D20903

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@272633 91177308-0d34-0410-b5e6-96231b3b80d8

2016-06-14 03:45:31 +00:00

..

assertions

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00

diagnostics.general

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00

errno

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00

std.exceptions

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00

syserr

Make system_error::message() thread safe. Fixes PR25598.

2016-06-14 03:45:31 +00:00

nothing_to_do.pass.cpp

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00