[llvm] r297661 - Bring back r297624.

[Yaron Keren via llvm-commits]

https://reviews.llvm.org/D31505

‫בתאריך יום ה׳, 30 במרץ 2017 ב-21:58 מאת ‪Joerg Sonnenberger via
llvm-commits‬‏ <‪llvm-commits at lists.llvm.org‬‏>:‬

> On Thu, Mar 30, 2017 at 01:44:25PM -0400, Rafael Espíndola via
> llvm-commits wrote:
> > On 30 March 2017 at 13:38, Yaron Keren <yaron.keren at gmail.com> wrote:
> > > stdout is special since getFD (pre-commit) always returns the same file
> > > descriptor, STDOUT_FILENO (1) whereas for regular files
> openFileForWrite
> > > will return new (unique) file descriptor and then there is no problem
> of
> > > closing one of them.
> >
> > With the current code we also get an unique file descriptor for each
> > call to get a stream to stdout.
>
> Actually, no. You get a reference to the same kernel file. Many/most of the
> properties of the file handle will persist and/or be shared. This is
> different from (re)opening the same regular file multiple times.
>
> Joerg
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