The problem appears to be that these flags can only be used
when mapping a file for read-only, not for readwrite. So
we do that here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295880 91177308-0d34-0410-b5e6-96231b3b80d8
The function for distinguishing local and remote files added in r295768
unconditionally uses linux/magic.h header to provide necessary
filesystem magic numbers. However, in kernel headers predating 2.6.18
the magic numbers are spread throughout multiple include files.
Furthermore, LLVM did not require kernel headers being installed so far.
To increase the portability across different versions of Linux kernel
and different Linux systems, add CMake header checks for linux/magic.h
and -- if it is missing -- the linux/nfs_fs.h and linux/smb.h headers
which contained the numbers previously.
Furthermore, since the numbers are static and the feature does not seem
critical enough to make LLVM require kernel headers at all, add fallback
constants for the case when none of the necessary headers is available.
Differential Revision: https://reviews.llvm.org/D30261
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295854 91177308-0d34-0410-b5e6-96231b3b80d8
Since I'm only seeing failures on OSX, and it's saying
permission denied, I'm suspecting this is due to the addition
of the MAP_RESILIENT_CODESIGN and/or MAP_RESILIENT_MEDIA flags.
Speculatively trying to remove those to get the bots working.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295770 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Use the O_CLOEXEC flag only when it is available. Some old systems (e.g.
SLES10) do not support this flag. POSIX explicitly guarantees that this
flag can be checked for using #if, so there is no need for a CMake
check.
In case O_CLOEXEC is not supported, fall back to fcntl(FD_CLOEXEC)
instead.
Reviewers: rnk, rafael, mgorny
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D28894
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292912 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This adds a cross-platform way of setting the current working directory
analogous to the existing current_path() function used for retrieving
it. The function will be used in lldb.
Reviewers: rafael, silvas, zturner
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D29035
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292907 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This makes the file descriptors on unix platform non-inheritable (O_CLOEXEC).
There is no change in behavior on windows, as the handles were already
non-inheritable there.
Reviewers: rnk, rafael
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D28854
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292401 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The motivation is to support better the -object_path_lto option on
Darwin. The linker needs to write down the generate object files on
disk for later use by lldb or dsymutil (debug info are not present
in the final binary). We're moving this into libLTO so that we can
be smarter when a cache is enabled and hard-link when possible
instead of duplicating the files.
Reviewers: tejohnson, deadalnix, pcc
Subscribers: dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D27507
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289631 91177308-0d34-0410-b5e6-96231b3b80d8
If we don't have futimens(), we fall back to futimes(), which only supports
microsecond timestamps. In that case, we need to explicitly cast away the extra
precision in setLastModificationAndAccessTime().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284977 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This is a follow-up to D25416. It removes all usages of TimeValue from
llvm/Support library (except for the actual TimeValue declaration), and replaces
them with appropriate usages of std::chrono. To facilitate this, I have added
small utility functions for converting time points and durations into appropriate
OS-specific types (FILETIME, struct timespec, ...).
Reviewers: zturner, mehdi_amini
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D25730
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284966 91177308-0d34-0410-b5e6-96231b3b80d8
This makes sure that space is actually available. With this change
running lld on a full file system causes it to exit with
failed to open foo: No space left on device
instead of crashing with a sigbus.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276017 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts commit r265074 and r265068.
Breaks windows build
From: Mehdi Amini <mehdi.amini@apple.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265080 91177308-0d34-0410-b5e6-96231b3b80d8
Breaks windows bot.
This reverts commit r265050.
This reverts commit r265055.
From: Mehdi Amini <mehdi.amini@apple.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265062 91177308-0d34-0410-b5e6-96231b3b80d8
This reverts commit r264387.
Bots are broken in various ways, I need to take one commit at a time...
From: Mehdi Amini <mehdi.amini@apple.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264390 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The new function sys::path::user_cache_directory tries to discover
a directory suitable for cache storage for current system user.
On Windows and Darwin it returns a path to system-specific user cache directory.
On Linux it follows XDG Base Directory Specification, what is:
- use non-empty $XDG_CACHE_HOME env var,
- use $HOME/.cache.
Reviewers: chapuni, aaron.ballman, rafael
Subscribers: rafael, aaron.ballman, llvm-commits
Differential Revision: http://reviews.llvm.org/D13801
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251784 91177308-0d34-0410-b5e6-96231b3b80d8
When the driver tries to locate a program by its name, e.g. a linker, it
scans the paths provided by the toolchain using the ScanDirForExecutable
function. If the lookup fails, the driver uses
llvm::sys::findProgramByName. Unlike llvm::sys::findProgramByName,
ScanDirForExecutable is not aware of file extensions. If the program has
the "exe" extension in its name, which is very common on Windows,
ScanDirForExecutable won't find it under the toolchain-provided paths.
This patch changes the Windows version of the "`can_execute`" function
called by ScanDirForExecutable to respect file extensions, similarly to
llvm::sys::findProgramByName.
Patch by Oleg Ranevskyy
Reviewers: rnk
Differential Revision: http://reviews.llvm.org/D12711
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247358 91177308-0d34-0410-b5e6-96231b3b80d8
The main difference is the removal of
std::error_code exists(const Twine &path, bool &result);
It was an horribly redundant interface since a file not existing is also a valid
error_code. Now we have an access function that returns just an error_code. This
is the only function that has to be implemented for Unix and Windows. The
functions can_write, exists and can_execute an now just wrappers.
One still has to be very careful using these function to avoid introducing
race conditions (Time of check to time of use).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217625 91177308-0d34-0410-b5e6-96231b3b80d8
We had two functions for finding the temp or cache directory. Each had a
different set of smarts about OS specific APIs.
With this patch system_temp_directory becomes the only way to do it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216460 91177308-0d34-0410-b5e6-96231b3b80d8
Some versions of Android don't have futimes/futimens and this code wasn't
updated during the recent errc refactoring.
Patch by Luqman Aden!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212055 91177308-0d34-0410-b5e6-96231b3b80d8
