On Linux some C++ and C include files reside in target specific directories, like /usr/include/x86_64-linux-gnu.
Patch adds them to libclang, so LLDB jitter has more chances to compile expression.
OS Laboratory. Huawei Russian Research Institute. Saint-Petersburg
Reviewed By: teemperor
Differential Revision: https://reviews.llvm.org/D110827
[NFC] As part of using inclusive language within the llvm project, this patch
replaces `m_master` in `ASTImporterDelegate` with `m_main`.
Reviewed By: teemperor, clayborg
Differential Revision: https://reviews.llvm.org/D113720
This reverts commit 3bf96b0329.
It causes crashes as reported in PR52257 and a few other places. A reproducer is bundled with this commit to verify any fix forward. The original test is left in place, but marked XFAIL as it now produces the wrong result.
Reviewed By: teemperor
Differential Revision: https://reviews.llvm.org/D113449
There is no reason why this function should be returning a ConstString.
While modifying these files, I also fixed several instances where
GetPluginName and GetPluginNameStatic were returning different strings.
I am not changing the return type of GetPluginNameStatic in this patch, as that
would necessitate additional changes, and this patch is big enough as it is.
Differential Revision: https://reviews.llvm.org/D111877
.. and reduce the scope of others. They don't follow llvm coding
standards (which say they should be used only when the same effect
cannot be achieved with the static keyword), and they set a bad example.
The `fallback` setting for import-std-module is supposed to allow running
expression that require an imported C++ module without causing any regressions
for users (neither in terms of functionality nor performance). This is done by
first trying to normally parse/evaluate an expression and when an error occurred
during this first attempt, we retry with the loaded 'std' module.
When we run into a system with a 'std' module that for some reason doesn't build
or otherwise causes parse errors, then this currently means that the second
parse attempt will overwrite the error diagnostics of the first parse attempt.
Given that the module build errors are outside of the scope of what the user can
influence, it makes more sense to show the errors from the first parse attempt
that are only concerned with the actual user input.
Reviewed By: aprantl
Differential Revision: https://reviews.llvm.org/D110696
I was debugging a problem and noticed that it would have been helpful to have
the type of each FieldDecl when looking at the output from
ClangASTSource::layoutRecordType.
Differential Revision: https://reviews.llvm.org/D108257
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
Rather than passing two booleans around, which is especially error prone
with them being next to each other, use a struct with named fields
instead.
Differential revision: https://reviews.llvm.org/D107295
LLVM includes this header unconditionally on all platforms
(including Windows), so this define should no longer be necessary.
No behavior change.
Differential Revision: https://reviews.llvm.org/D107338
In order to mirror the GetElementPtrInst::indices() API.
Wanted to use this in the IRForTarget code, and was surprised to
find that it didn't exist yet.
In one case use the source element type of the original GEP. In the
other the correct type isn't obvious to me, so use
getPointerElementType() for now.
This reverts commit 00764c36ed and the
follow up d2223c7a49.
The original patch broke that one could use static member variables while
inside a static member functions without having a running target. It seems that
LLDB currently requires that static variables are only found via the global
variable lookup so that they can get materialized and mapped to the argument
struct of the expression.
After 00764c36ed static variables of the current
class could be found via Clang's lookup which LLDB isn't observing. This
resulting in expressions actually containing these variables as normal
globals that can't be rewritten to a member of the argument struct.
More specifically, in the test TestCPPThis, the expression
`expr --j false -- s_a` is now only passing if we have a runnable target.
I'll revert the patch as the possible fixes aren't trivial and it degrades
the debugging experience more than the issue that the revert patch addressed.
The underlying bug can be reproduced before/after this patch by stopping
in `TestCPPThis` main function and running: `e -j false -- my_a; A<int>::s_a`.
The `my_a` will pull in the `A<int>` class and the second expression will
be resolved by Clang on its own (which causes LLDB to not materialize the
static variable).
Note: A workaround is to just do `::s_a` which will force LLDB to take the global
variable lookup.
This converts a default constructor's member initializers into C++11
default member initializers. This patch was automatically generated with
clang-tidy and the modernize-use-default-member-init check.
$ run-clang-tidy.py -header-filter='lldb' -checks='-*,modernize-use-default-member-init' -fix
This is a mass-refactoring patch and this commit will be added to
.git-blame-ignore-revs.
Differential revision: https://reviews.llvm.org/D103483
The C headers are deprecated so as requested in D102845, this is replacing them
all with their (not deprecated) C++ equivalent.
Reviewed By: shafik
Differential Revision: https://reviews.llvm.org/D103084
IRForTarget is never used by a pass manager or any other interface that requires
this class to inherit from `Pass`.
Also IRForTarget doesn't implement the current interface correctly because it
uses the `runOnModule` return value to indicate success/failure instead of
changed/not-changed, so if this ever ends up being used as a pass it would most
likely not work as intended.
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D102677
Clang adds a Decl in two phases to a DeclContext. First it adds it invisible and
then it makes it visible (which will add it to the lookup data structures). It's
important that we can't do lookups into the DeclContext we are currently adding
the Decl to during this process as once the Decl has been added, any lookup will
automatically build a new lookup map and add the added Decl to it. The second
step would then add the Decl a second time to the lookup which will lead to
weird errors later one. I made adding a Decl twice to a lookup an assertion
error in D84827.
In the first step Clang also does some computations on the added Decl if it's
for example a FieldDecl that is added to a RecordDecl.
One of these computations is checking if the FieldDecl is of a record type
and the record type has a deleted constexpr destructor which will delete
the constexpr destructor of the record that got the FieldDecl.
This can lead to a bug with the way we implement MinimalImport in LLDB
and the following code:
```
struct Outer {
typedef int HookToOuter;
struct NestedClass {
HookToOuter RefToOuter;
} NestedClassMember; // We are adding this.
};
```
1. We just imported `Outer` minimally so far.
2. We are now asked to add `NestedClassMember` as a FieldDecl.
3. We import `NestedClass` minimally.
4. We add `NestedClassMember` and clang does a lookup for a constexpr dtor in
`NestedClass`. `NestedClassMember` hasn't been added to the lookup.
5. The lookup into `NestedClass` will now load the members of `NestedClass`.
6. We try to import the type of `RefToOuter` which will try to import the `HookToOuter` typedef.
7. We import the typedef and while importing we check for conflicts in `Outer` via a lookup.
8. The lookup into `Outer` will cause the invisible `NestedClassMember` to be added to the lookup.
9. We continue normally until we get back to the `addDecl` call in step 2.
10. We now add `NestedClassMember` to the lookup even though we already did that in step 8.
The fix here is disabling the minimal import for RecordTypes from FieldDecls. We
actually already did this, but so far we only force the definition of the type
to be imported *after* we imported the FieldDecl. This just moves that code
*before* we import the FieldDecl so prevent the issue above.
Reviewed By: shafik, aprantl
Differential Revision: https://reviews.llvm.org/D102993
More decoupling of plugins and non-plugins. Target doesn't need to
manage ClangModulesDeclVendor and ClangPersistentVariables is always available
in situations where you need ClangModulesDeclVendor.
Differential Revision: https://reviews.llvm.org/D102811
At the moment the expression parser doesn't support evaluating expressions in
static member functions and just pretends the expression is evaluated within a
non-member function. This causes that all static members are inaccessible when
doing unqualified name lookup.
This patch adds support for evaluating in static member functions. It
essentially just does the same setup as what LLDB is already doing for
non-static member functions (i.e., wrapping the expression in a fake member
function) with the difference that we now mark the wrapping function as static
(to prevent access to non-static members).
Reviewed By: shafik, jarin
Differential Revision: https://reviews.llvm.org/D81550
LLDB uses utility functions to run code in the inferior for its own
internal purposes, such as reading classes from the Objective-C runtime
for example. Because these expressions should be transparent to the
user, we ignore breakpoints and unwind the stack on errors, which
makes them hard to debug.
This patch adds a new setting target.debug-utility-expression that, when
enabled, changes these options to facilitate debugging. It enables
breakpoints, disables unwinding and writes out the utility function
source code to disk so it shows up in the source view.
Differential revision: https://reviews.llvm.org/D97249
LLDB tracks where any imported `clang::Decl` originally came from via a simple
map from 'imported decl' to 'original decl'. That information is used to later
complete parts of the Decl when more information is requested about a certain
Decl (e.g., via the ExternalASTSource interface from Clang).
When finding the 'original decl' for a given decl, the ASTImporterDelegate
essentially just recursively follows the previously mentioned map from
'imported' to 'original decl' until it can find any further 'original decl'. The
final found decl is then the one that will be imported. The recursion is
necessary as in LLDB we don't just import decls from one ASTContext to another,
but also from one ASTContext to another via a (potentially temporary)
ASTContext. For example, the expression parser creates a temporary ASTContext
for parsing the current expression.
The problem with the recursion is however that if we somehow get a cycle into
our mapping, then the ASTImporterDelegate will just infinite recurse. As the
infinite recursion usually happens after the cycle was already created in a code
path such as completing a type, the crash backtraces we get for these bugs are
not very useful. However having the backtrace where the faulty map entry is
created usually makes the code trivial to fix (as there should be some rogue
CopyType call or something similar nearby. See for example D96366).
This patch tries to make these issues easier to track down by putting a bunch of
sanity asserts in the code that fills out the map. All the asserts are just
checking that there is no direct cycle (ASTContext maps to itself) when updating
the origin tracking map.
The assert in the ASTImportDelegate constructor is an `lldbassert` (which also
is getting checked in release builds with disabled asserts) as the code path
there is pretty cold and we can reliably detect a rogue CopyType call from
there.
I also had to update some code in
`ClangASTImporter::ASTImporterDelegate::Imported`. This code already had a
safety check for creating a cycle in the origin tracking map, but it still
constructed an ASTImporter while checking for the cycle (by requesting a
delegate via `GetDelegate` and passing two identical ASTContexts which looks
like a rogue CopyType call to the checks).
Reviewed By: shafik
Differential Revision: https://reviews.llvm.org/D97300
The comment for ValueType claims that all values <1 are errors, but
not all switch statements take this into account. This patch
introduces an explicit Error case and deletes all default: cases, so
we get warned about incomplete switch coverage.
https://reviews.llvm.org/D96537
It looks like a previous change switched these from LLDB_LOGF but did not update the format strings.
Differential Revision: https://reviews.llvm.org/D96550
Clang emits a warning when accessing an Objective-C getter but not using the result.
This gets triggered when just trying to print a getter value in the expression parser (where
Clang just sees a normal expression like `obj.getter` while parsing).
This patch just disables the warning in the expression parser (similar to what we do with
the C++ equivalent of just accessing a member variable but not doing anything with it).
Reviewed By: kastiglione
Differential Revision: https://reviews.llvm.org/D94307
Identical to previous commits that just add a standard library template to the
supported template list and test it. Adding this rather obscure class to the
template list is mostly caused by the std::deque test unexpectedly referencing
this type when testing against newer libc++ versions on macOS.
Fixes TestQueueFromStdModule and TestQueueFromStdModule on macOS.
Fixes rdar://73213589
Migrate to the `FileEntryRef` overload of `SourceManager::createFileID`
(using `FileManager::getOptionalFileRef`) in
`ClangExpressionParser::ParseInternal`.
No functionality change here.
Differential Revision: https://reviews.llvm.org/D92957
Currently when LLDB has enough data in the debug information to import the `std` module,
it will just try to import it. However when debugging libraries where the sources aren't
available anymore, importing the module will generate a confusing diagnostic that
the module couldn't be built.
For the fallback mode (where we retry failed expressions with the loaded module), this
will cause the second expression to fail with a module built error instead of the
actual parsing issue in the user expression.
This patch adds checks that ensures that we at least have any source files in the found
include paths before we try to import the module. This prevents the module from being
loaded in the situation described above which means we don't emit the bogus 'can't
import module' diagnostic and also don't waste any time retrying the expression in the
fallback mode.
For the unit tests I did some refactoring as they now require a VFS with the files in it
and not just the paths. The Python test just builds a binary with a fake C++ module,
then deletes the module before debugging.
Fixes rdar://73264458
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D95096
Replace uses of GetModuleAtIndexUnlocked and
GetModulePointerAtIndexUnlocked with the ModuleIterable and
ModuleIterableNoLocking where applicable.
Differential revision: https://reviews.llvm.org/D94271
7ad49aec12 added a __memory subdirectory to libc++
but the code we use to find libc++ from the debug info support files wasn't
prepared to encounter unknown subdirectories within libc++. The import-std-module
tests automatically fell back to not importing the std module which caused
them to fail.
This patch removes our hardcoded exception for the 'experimental' subdirectory
and instead just ignores all subdirectories of c++/vX/ when searching the
support files.
Pavel Kosov