Revert "[SystemZ][z/OS] Propagate IsText parameter to open text files as text (#107906)"

This reverts commit edf3b277a5f2ebe144827ed47463c22743cac5f9.

[SystemZ][z/OS] Propagate IsText parameter to open text files as text (#107906)

This patch adds an IsText parameter to the following functions
openFileForRead, getBufferForFile, getBufferForFileImp

[SystemZ][z/OS] Propagate IsText parameter to open text files as text (#107906)

This patch adds an IsText parameter to the following functions
openFileForRead, getBufferForFile, getBufferForFileImpl and determines
whether a file is text by querying the file tag on z/OS. The default is
set to OF_Text instead of OF_None, this change in value does not affect
any other platforms other than z/OS.

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Apply modernize-use-starts-ends-with on llvm-project (#89140)

Run `modernize-use-starts-ends-with` on llvm-project. Two instances are
flagged, minor readability improvements, extremely minor perfor

Apply modernize-use-starts-ends-with on llvm-project (#89140)

Run `modernize-use-starts-ends-with` on llvm-project. Two instances are
flagged, minor readability improvements, extremely minor performance
improvements.

```
python3 clang-tools-extra/clang-tidy/tool/run-clang-tidy.py \
-clang-tidy-binary="build/bin/clang-tidy" \
-clang-apply-replacements-binary="build/bin/clang-apply-replacements" \
-checks="-*,modernize-use-starts-ends-with" \
-header-filter=".*" \
-fix -format
```

I am working on some additions to this check, but they don't seem to
flag any additional cases anyway.

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[lldb] Fix test build failure

Caused by commit edd7fed9da48c0e708cce9bd4d305ae43d8bd77c

FileSystem::EnumerateDirectory should skip entries w/o Status, not halt

EnumerateDirectory gets the vfs::Status of each directory entry to
decide how to process it. If it is unable to get the Statu

FileSystem::EnumerateDirectory should skip entries w/o Status, not halt

EnumerateDirectory gets the vfs::Status of each directory entry to
decide how to process it. If it is unable to get the Status for
a directory entry, it will currently halt the directory iteration
entirely. It should only skip this entry.

Differential Revision: https://reviews.llvm.org/D153822
rdar://110861210

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[LLDB] Applying clang-tidy modernize-use-default-member-init over LLDB

Applied modernize-use-default-member-init clang-tidy check over LLDB.
It appears in many files we had already switched to in cl

[LLDB] Applying clang-tidy modernize-use-default-member-init over LLDB

Applied modernize-use-default-member-init clang-tidy check over LLDB.
It appears in many files we had already switched to in class member init but
never updated the constructors to reflect that. This check is already present in
the lldb/.clang-tidy config.

Differential Revision: https://reviews.llvm.org/D121481

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[lldb] [gdb-remote] Add eOpenOptionReadWrite for future gdb compat

Modify OpenOptions enum to open the future path into synchronizing
vFile:open bits with GDB. Currently, LLDB and GDB use different

[lldb] [gdb-remote] Add eOpenOptionReadWrite for future gdb compat

Modify OpenOptions enum to open the future path into synchronizing
vFile:open bits with GDB. Currently, LLDB and GDB use different flag
models effectively making it impossible to match bits. Notably, LLDB
uses two bits to indicate read and write status, and uses union of both
for read/write. GDB uses a value of 0 for read-only, 1 for write-only
and 2 for read/write.

In order to future-proof the code for the GDB variant:

1. Add a distinct eOpenOptionReadWrite constant to be used instead
of (eOpenOptionRead | eOpenOptionWrite) when R/W access is required.

2. Rename eOpenOptionRead and eOpenOptionWrite to eOpenOptionReadOnly
and eOpenOptionWriteOnly respectively, to make it clear that they
do not mean to be combined and require update to all call sites.

3. Use the intersection of all three flags when matching against
the three possible values.

This commit does not change the actual bits used by LLDB.

Differential Revision: https://reviews.llvm.org/D106984

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[lldb/Support] Treat empty FileSpec as an invalid file.

LLDB relies on empty FileSpecs being invalid files, for example, they
don't exists. Currently this assumption does not always hold during
repr

[lldb/Support] Treat empty FileSpec as an invalid file.

LLDB relies on empty FileSpecs being invalid files, for example, they
don't exists. Currently this assumption does not always hold during
reproducer replay, because we pass the result of GetPath to the VFS.
This is an empty string, which the VFS converts to an absolute directory
by prepending the current working directory, before looking it up in the
YAML mapping. This means that an empty FileSpec will exist when the
current working directory does. This breaks at least one test
(TestAddDsymCommand.py) when ran from replay.

This patch special cases empty FileSpecs and returns a sensible result
before calling GetPath and forwarding the call.

Differential revision: https://reviews.llvm.org/D77351

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Make llvm::StringRef to std::string conversions explicit.

This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly m

Make llvm::StringRef to std::string conversions explicit.

This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.

This doesn't actually modify StringRef yet, I'll do that in a follow-up.

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[lldb][NFC] Fix all formatting errors in .cpp file headers

Summary:
A *.cpp file header in LLDB (and in LLDB) should like this:
```
//===-- TestUtilities.cpp ----------------------------------------

[lldb][NFC] Fix all formatting errors in .cpp file headers

Summary:
A *.cpp file header in LLDB (and in LLDB) should like this:
```
//===-- TestUtilities.cpp -------------------------------------------------===//
```
However in LLDB most of our source files have arbitrary changes to this format and
these changes are spreading through LLDB as folks usually just use the existing
source files as templates for their new files (most notably the unnecessary
editor language indicator `-*- C++ -*-` is spreading and in every review
someone is pointing out that this is wrong, resulting in people pointing out that this
is done in the same way in other files).

This patch removes most of these inconsistencies including the editor language indicators,
all the different missing/additional '-' characters, files that center the file name, missing
trailing `===//` (mostly caused by clang-format breaking the line).

Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere

Reviewed By: JDevlieghere

Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D73258

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Convert FileSystem::Open() to return Expected<FileUP>

Summary:
This patch converts FileSystem::Open from this prototype:

Status
Open(File &File, const FileSpec &file_spec, ...);

to this one:

llvm

Convert FileSystem::Open() to return Expected<FileUP>

Summary:
This patch converts FileSystem::Open from this prototype:

Status
Open(File &File, const FileSpec &file_spec, ...);

to this one:

llvm::Expected<std::unique_ptr<File>>
Open(const FileSpec &file_spec, ...);

This is beneficial on its own, as llvm::Expected is a more modern
and recommended error type than Status. It is also a necessary step
towards https://reviews.llvm.org/D67891, and further developments
for lldb_private::File.

Reviewers: JDevlieghere, jasonmolenda, labath

Reviewed By: labath

Subscribers: mgorny, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D67996

llvm-svn: 373003

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Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the ne

Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636

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[unittests] Fix the File System Test on Windows

Two of the file system tests are failing on Windows - this updates them to expect the correct values after the refactor of the file system code.

llvm

[unittests] Fix the File System Test on Windows

Two of the file system tests are failing on Windows - this updates them to expect the correct values after the refactor of the file system code.

llvm-svn: 347796

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[unittest] Fix the FileSystem test on Windows. (Attempt #2)

This fixes the double escaping and compares FileSpecs instead of
strings.

llvm-svn: 347725

[unittest] Fix the FileSystem test on Windows.

On Windows, when using the VFS without going through FileSpec, the
absolute path to `/foo` is `\\foo`. This updates the unittest to expect
that.

llvm-

[unittest] Fix the FileSystem test on Windows.

On Windows, when using the VFS without going through FileSpec, the
absolute path to `/foo` is `\\foo`. This updates the unittest to expect
that.

llvm-svn: 347712

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revert rL346478

Summary:

Reviewers:

Subscribers:

llvm-svn: 346502

[lldb] Fix signature in test to match rL346453

llvm-svn: 346478

Revert "[FileSystem] Make use of FS in TildeExpressionResolver"

The whole point of this change was making it possible to resolve paths
without depending on the FileSystem, which is not what I did he

Revert "[FileSystem] Make use of FS in TildeExpressionResolver"

The whole point of this change was making it possible to resolve paths
without depending on the FileSystem, which is not what I did here. Not
sure what I was thinking...

llvm-svn: 346466

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[FileSystem] Make use of FS in TildeExpressionResolver

In order to call real_path from the TildeExpressionResolver we need
access to the FileSystem. Since the resolver lives under utility we have
to

[FileSystem] Make use of FS in TildeExpressionResolver

In order to call real_path from the TildeExpressionResolver we need
access to the FileSystem. Since the resolver lives under utility we have
to pass in the FS.

llvm-svn: 346457

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[FileSystem] Move path resolution logic out of FileSpec

This patch removes the logic for resolving paths out of FileSpec and
updates call sites to rely on the FileSystem class instead.

Differential

[FileSystem] Move path resolution logic out of FileSpec

This patch removes the logic for resolving paths out of FileSpec and
updates call sites to rely on the FileSystem class instead.

Differential revision: https://reviews.llvm.org/D53915

llvm-svn: 345890

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[FileSystem] Re-add EnumerateDirectory

Re-enable EnumerateDirectory now that no_push is available in llvm (r345793).

llvm-svn: 345799

[FileSystem] Remove EnumerateDirectory

The new implementation of EnumerateDirectory relies on `::no_push()`
being implemented for the VFS recursive directory iterators. However
this patch (D53465) h

[FileSystem] Remove EnumerateDirectory

The new implementation of EnumerateDirectory relies on `::no_push()`
being implemented for the VFS recursive directory iterators. However
this patch (D53465) hasn't been landed yet.

llvm-svn: 345787

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[FileSystem] Extend file system and have it use the VFS.

This patch extends the FileSystem class with a bunch of functions that
are currently implemented as methods of the FileSpec class. These
meth

[FileSystem] Extend file system and have it use the VFS.

This patch extends the FileSystem class with a bunch of functions that
are currently implemented as methods of the FileSpec class. These
methods will be removed in future commits and replaced by calls to the
file system.

The new functions are operated in terms of the virtual file system which
was recently moved from clang into LLVM so it could be reused in lldb.
Because the VFS is stateful, we turned the FileSystem class into a
singleton.

Differential revision: https://reviews.llvm.org/D53532

llvm-svn: 345783

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Remove TimeValue usage from FileSpec.h

Summary:
The only usage there was in GetModificationTime(). I also took the opportunity
to move this function from FileSpec to the FileSystem class - since we

Remove TimeValue usage from FileSpec.h

Summary:
The only usage there was in GetModificationTime(). I also took the opportunity
to move this function from FileSpec to the FileSystem class - since we are
using FileSpecs to also represent remote files for which we cannot (easily)
retrieve modification time, it makes sense to make the decision to get the
modification time more explicit.

The new function returns a llvm::sys::TimePoint<>. To aid the transition
from TimeValue, I have added a constructor to it which enables implicit
conversion from a time_point.

Reviewers: zturner, clayborg

Subscribers: mehdi_amini, tberghammer, danalbert, beanz, mgorny, lldb-commits

Differential Revision: https://reviews.llvm.org/D25392

llvm-svn: 285702

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