Re-reapply "[Dexter] Remove builder from Dexter"

This patch makes a further attempt to fix the tests broken by the
previous revision by ensuring that the command line for the modified
Dexter tests u

Re-reapply "[Dexter] Remove builder from Dexter"

This patch makes a further attempt to fix the tests broken by the
previous revision by ensuring that the command line for the modified
Dexter tests use -std=gnu++11, in keeping with the old build script.

This reverts commit 5647f2908de90fe07b0805e988cd2e91a1751928.

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Revert "Reapply "[Dexter] Remove builder from Dexter""

Re-application of the Dexter builder removal reversed due to continued
errors on the green dragon LLDB buildbot:
https://green.lab.llvm.org/gre

Revert "Reapply "[Dexter] Remove builder from Dexter""

Re-application of the Dexter builder removal reversed due to continued
errors on the green dragon LLDB buildbot:
https://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake/59716/

Cause of the error is unclear, but it looks as though there is some
unexpected non-determinism in the test failures.

This reverts commit 323270451d8db24f2c816f455b3d8f70f434286d.

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Reapply "[Dexter] Remove builder from Dexter"

Fixes a test which was broken on the green dragon buildbot, and further
failures on the SIE buildbot.

This reverts commit 8df9eff90ff8c79e3e508cce7fec1

Reapply "[Dexter] Remove builder from Dexter"

Fixes a test which was broken on the green dragon buildbot, and further
failures on the SIE buildbot.

This reverts commit 8df9eff90ff8c79e3e508cce7fec1cd897487069.

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Revert "[Dexter] Remove builder from Dexter"
& Revert "[Dexter] Fix incorrect substitution errors in clang-cl builder"

This reverts commits 262520a3c5450fd7f149438245b2aef12736347f,
and 0b72b71cd3c8

Revert "[Dexter] Remove builder from Dexter"
& Revert "[Dexter] Fix incorrect substitution errors in clang-cl builder"

This reverts commits 262520a3c5450fd7f149438245b2aef12736347f,
and 0b72b71cd3c8ad824342c05bc6d9d64d87eeb81b.

Failures occurred on two buildbots, the SIE buildbot:
https://lab.llvm.org/buildbot/#/builders/216/builds/26006

And the green dragon buildbot:
https://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake/59091

Errors appear to be related to incorrect tool substitution in the Dexter
test commands, and a currently unknown error with one of the general
debuginfo tests that uses Dexter.

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[Dexter] Remove builder from Dexter

See "discussion":
https://discourse.llvm.org/t/rfc-dexter-feature-removals/60462

This patch removes the builder functionality from Dexter, as it is an active
m

[Dexter] Remove builder from Dexter

See "discussion":
https://discourse.llvm.org/t/rfc-dexter-feature-removals/60462

This patch removes the builder functionality from Dexter, as it is an active
maintenance burden and is no longer required since Dexter is being invoked by
other test runners that can handle the build step better, and there has been no
objection that it is still needed.

Differential Revision: https://reviews.llvm.org/D151465

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[NFC][Py Reformat] Reformat python files in the rest of the dirs

This is an ongoing series of commits that are reformatting our
Python code. This catches the last of the python files to
reformat. Si

[NFC][Py Reformat] Reformat python files in the rest of the dirs

This is an ongoing series of commits that are reformatting our
Python code. This catches the last of the python files to
reformat. Since they where so few I bunched them together.

Reformatting is done with `black`.

If you end up having problems merging this commit because you
have made changes to a python file, the best way to handle that
is to run git checkout --ours <yourfile> and then reformat it
with black.

If you run into any problems, post to discourse about it and
we will try to help.

RFC Thread below:

https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style

Reviewed By: jhenderson, #libc, Mordante, sivachandra

Differential Revision: https://reviews.llvm.org/D150784

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[Dexter] Use PurePath to compare paths in Dexter commands

Prior to this patch, when comparing the paths of source files in Dexter
commands, we would use os.samefile. This function performs actual fi

[Dexter] Use PurePath to compare paths in Dexter commands

Prior to this patch, when comparing the paths of source files in Dexter
commands, we would use os.samefile. This function performs actual file
operations and requires the files to exist on the current system; this
is suitable when running the test for the first time, but renders the
DextIR output files non-portable, and unusable if the source files no
longer exist in their original location.

Differential Revision: https://reviews.llvm.org/D127099

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[Dexter] Catch value error when encountering invalid address

The DexDeclareAddress command checks the value of a variable at a
certain point in the debugged program, and saves that value to be used

[Dexter] Catch value error when encountering invalid address

The DexDeclareAddress command checks the value of a variable at a
certain point in the debugged program, and saves that value to be used
in other commands. If the value at that point is not a valid address
however, it currently causes an error in Dexter when we try to cast it -
this is fixed in this patch by catching the error and leaving the
address value unresolved.

Differential Revision: https://reviews.llvm.org/D127101

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[Dexter] Add DexDeclareAddress command and address function

This patch adds a new dexter command, DexDeclareAddress, which is used
to test the relative values of pointer variables. The motivation fo

[Dexter] Add DexDeclareAddress command and address function

This patch adds a new dexter command, DexDeclareAddress, which is used
to test the relative values of pointer variables. The motivation for
adding this command is to allow meaningful assertions to be made about
pointers that go beyond checking variable availability and null
equality.

The full explanation and syntax is in Commands.md.

Reviewed By: Orlando

Differential Revision: https://reviews.llvm.org/D111447

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