[lldb] Add synthetic formatter for llvm::Expected (#118758)

Adds a synthetic formatter for `llvm::Expected<T>`. The synthetic value
will have a single child, either `value` or `error`.

Make lldbDataFormatters.py compatible with Python 3.8 (#82518)

I just tried to load this into LLDB built against Python 3.8.5 and got
the following error: `TypeError: 'type' object is not subscript

Make lldbDataFormatters.py compatible with Python 3.8 (#82518)

I just tried to load this into LLDB built against Python 3.8.5 and got
the following error: `TypeError: 'type' object is not subscriptable`. I
could fix this by wrapping the annotations in quotes but since Python
3.7 this syntax can be enabled with `from __future__ import
annotations`.

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[llvm][utils] Fix SmallString summary provider (#78527)

Fixes `SmallString` summary provider, which was incorrectly producing the empty string.
Initially I thought the strings I was debugging were

[llvm][utils] Fix SmallString summary provider (#78527)

Fixes `SmallString` summary provider, which was incorrectly producing the empty string.
Initially I thought the strings I was debugging were empty for unknown reasons, but
that was not the case.

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[lldb] Allow lldbDataFormatters.py to be used by other names (NFC) (#65528)

Instead of hard-coding the name `lldbDataFormatters`, use `__name__` to
get the module's name.

This allows the formatters

[lldb] Allow lldbDataFormatters.py to be used by other names (NFC) (#65528)

Instead of hard-coding the name `lldbDataFormatters`, use `__name__` to
get the module's name.

This allows the formatters to be loaded from any path, with any
filename.

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[llvm][utils] Fix SmallVector formatter when type is a pointer

Previously types such as `SmallVector<clang::Attr, 4> *` would
trigger the assertion inside the `SmallVector` formatter:
```
assert sel

[llvm][utils] Fix SmallVector formatter when type is a pointer

Previously types such as `SmallVector<clang::Attr, 4> *` would
trigger the assertion inside the `SmallVector` formatter:
```
assert self.type_size != 0
```
This happens because `the_type.GetTemplateArgumentType(0)` returns
`None` (since `the_type` is a pointer to the `SmallVector`).

This patch dereferences `the_type` if it's a pointer type. We do this
for references already.

Differential Revision: https://reviews.llvm.org/D157961

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[llvm][utils] Use literal type name for non-template data formatters (NFC)

These don't need to be regex.

[llvm][utils] Add DenseMap data formatters

Add summary and synthetic data formatters for `llvm::DenseMap`.

This implementation avoids expression evaluation by using a heuristic. However, as
heurist

[llvm][utils] Add DenseMap data formatters

Add summary and synthetic data formatters for `llvm::DenseMap`.

This implementation avoids expression evaluation by using a heuristic. However, as
heuristics go, there is a corner case: A single deleted entry (a single "tombstone"),
will result in a child value with an invalid key but a valid value.

Instead of calling `getEmptyKey()` and `getTombstoneKey()` to determine which buckets
are empty, and which contain real key-values, the heuristic scans all buckets to
identify keys that exist only once. These singleton keys are considered valid.

The empty key will always exist multiple times. However the tombstone key may exist
zero, one, or many times. The heuristic has no problems when there are zero or many
tombstones, but when there is exactly one deleted entry (one tombstone), then the
heuristic will incorrectly identify it as valid.

Differential Revision: https://reviews.llvm.org/D137028

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[llvm][utils] Disable lldb formatters for PointerIntPair and PointerUnion

These synthetic providers use expression evaluation and fail in some cases.

Examples:

```
llvm::PointerIntPair<llvm::Point

[llvm][utils] Disable lldb formatters for PointerIntPair and PointerUnion

These synthetic providers use expression evaluation and fail in some cases.

Examples:

```
llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
Qualifiers::FastWidth> Value;
```

and

```
typedef llvm::PointerUnion<const ValueDecl *, const Expr *, TypeInfoLValue,
DynamicAllocLValue>
PtrTy;
```

Original contribution: D117779

rdar://110791233
rdar://112195543

Differential Revision: https://reviews.llvm.org/D155219

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[NFC][Py Reformat] Reformat python files in llvm

This is the first commit in a series that will reformat
all the python files in the LLVM repository.

Reformatting is done with `black`.

See more in

[NFC][Py Reformat] Reformat python files in llvm

This is the first commit in a series that will reformat
all the python files in the LLVM repository.

Reformatting is done with `black`.

See more information here:

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

Reviewed By: jhenderson, JDevlieghere, MatzeB

Differential Revision: https://reviews.llvm.org/D150545

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[llvm][utils] Make lldb data formatters show both summaries and children

When a type has a summary and synthetic child provider, the children are shown
only if `--expand`/`-e` is given.

This update

[llvm][utils] Make lldb data formatters show both summaries and children

When a type has a summary and synthetic child provider, the children are shown
only if `--expand`/`-e` is given.

This updates `lldbDataFormatters.py` to expand children of types that have both
a summary and synthetic children.

Differential Revision: https://reviews.llvm.org/D132095

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[lldb] Fix llvm::Optional summary provider

Differential Revision: https://reviews.llvm.org/D122041

[LLDB] Add formatters for PointerIntPair, PointerUnion

Also, add summaries for `SmallVector` and `ArrayRef`,
and fix the `StringRef` summary provider so it doesn't
ignore the `Length` field.

Differ

[LLDB] Add formatters for PointerIntPair, PointerUnion

Also, add summaries for `SmallVector` and `ArrayRef`,
and fix the `StringRef` summary provider so it doesn't
ignore the `Length` field.

Differential Revision: https://reviews.llvm.org/D117779

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[llvm][utils] Fix handling of llvm::None

[llvm][utils] Fix innocuous off by one in lldb formatters

num_children is "last_index" + 1, thus
num_children + 1 = "last_index" + 2

this worked anyway because the index of `$$dereference$$` wo

[llvm][utils] Fix innocuous off by one in lldb formatters

num_children is "last_index" + 1, thus
num_children + 1 = "last_index" + 2

this worked anyway because the index of `$$dereference$$` would work as long as
it was past the last index.

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[llvm][utils] Rename lldb dict variables to internal_dict

Most lldb scripts use `internal_dict`. Also, `dict` is a builtin constructor,
it's good habit to avoid using it as a variable name.

[llvm][utils] Support dereferencing llvm::Optional lldb formatter

Add deref support to `llvm::Optional` in `lldbDataFormatters.py`.

This creates a synthetic provider that adds dereference support,

[llvm][utils] Support dereferencing llvm::Optional lldb formatter

Add deref support to `llvm::Optional` in `lldbDataFormatters.py`.

This creates a synthetic provider that adds dereference support, but otherwise proxies all access to the underlying value.

With this change, an optional value can be displayed by running `v *someOptional`, and its contents can be accessed with the arrow `operator->`, for example `v someOpt->HasThing`. This matches expressions usable from expression evaluation.

See also D97165 and D97524.

Differential Revision: https://reviews.llvm.org/D97525

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Bring llvm::Optional data formatter back in sync with the implementation.

Fix a null dereference in the LLDB data formatters.

Add LLDB dataformatters for llvm::StringRef and lldb_private::ConstString

These data formatters make the string value appear in Xcode's
variables view (and on the command line) without having to exp

Add LLDB dataformatters for llvm::StringRef and lldb_private::ConstString

These data formatters make the string value appear in Xcode's
variables view (and on the command line) without having to expand the
data structure.

Differential Revision: https://reviews.llvm.org/D66354

llvm-svn: 369175

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[utils] Add a lldb data formatter for llvm::SmallString.

Result:

(lldb) p val
(llvm::SmallString<32>) $31 = "patatino"

llvm-svn: 359157

[utils] Update SmallVector lldb formatter for r337514

SmallVector was changed to store a begin and a size rather than a
begin and an end a while back. Update the formatter to look at the
correct mem

[utils] Update SmallVector lldb formatter for r337514

SmallVector was changed to store a begin and a size rather than a
begin and an end a while back. Update the formatter to look at the
correct members.

llvm-svn: 346252

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[utils] Fix the llvm::Optional data formatter

The llvm::Optional data formatter needs to look through the `Storage`
container if it's present.

Before:

220    if (Op && Op->getOp() != dwarf::DW_

[utils] Fix the llvm::Optional data formatter

The llvm::Optional data formatter needs to look through the `Storage`
container if it's present.

Before:

220    if (Op && Op->getOp() != dwarf::DW_OP_LLVM_fragment)
-> 221      HasComplexExpression = true;
   222
   223    // If the register can only be described by a complex expression (i.e.,
   224    // multiple subregisters) it doesn't safely compose with another complex
Target 0: (llc) stopped.
(lldb) p Op
(llvm::Optional<llvm::DIExpression::ExprOperand>) $0 = None

After:

(lldb) p Op
(llvm::Optional<llvm::DIExpression::ExprOperand>) $0 =
(llvm::DIExpression::ExprOperand) storage = {
Op = 0x000000010603d460
}

llvm-svn: 337752

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utils: Teach lldbDataFormatters about llvm::Optional

llvm-svn: 229956

utils: Teach lldbDataFormatters how to format ArrayRefs

llvm-svn: 217567

utils: Teach lldbDataFormatters to load automatically

Add an __lldb_init_module function so that importing the
lldbDataFormatters script automatically adds the formatters.

llvm-svn: 209712