Summary:
The ClangASTSource has a lock that globally disables all lookups into the
external AST source when we explicitly "guarded" copy a type. It's not used for
anything else, so importing declarations or importing types that are
dependencies of a declaration actually won't activate that lock. The lookups it
is supposed to prevent also don't actually happen in our test suite. The check
in `ClangExpressionDeclMap::FindExternalVisibleDecls` is never executed and the
check in the `ClangASTSource::FindExternalVisibleDeclsByName` is only ever
reached by the `Import-std-module` tests (which explicitly do a lookup into the
expression context on purpose).
This lock was added in 6abfabff61 as a replacement
for a list of types we already looked up which appeared to be an optimisation
strategy. I assume back then this lock had a purpose but these days the
ASTImporter and LLDB seem to be smart enough to avoid whatever lookups this
tried to prevent.
I would say we remove it from LLDB. The main reason is that it blocks D81561
(which explicitly does a specific lookup to resolve placeholder types produced
by `-flimit-debug-info`) but it's semantics are also very confusing. The naming
implies it's a flag to indicate when we import something at the moment which is
practically never true as described above. Also the fact that it makes our
ExternalASTSource alternate between doing lookups into the debug info and
pretending it doesn't know any external decls could really break our lookup in
some weird way if Clang decides to cache a fake empty lookup result that was
generated while the lock was active.
Reviewers: labath, shafik, JDevlieghere, aprantl
Reviewed By: labath, JDevlieghere, aprantl
Subscribers: aprantl, abidh
Differential Revision: https://reviews.llvm.org/D81749
Move the part of the code which is responsible for finding a complete
definition of the type into a separate function (FindCompleteType). This
is split off from D81561, as it's a generally useful cleanup.
No functional change.
Summary:
When we get an error back from IRForTarget we directly print that error to the
debugger output stream instead of putting it in the result object. The result
object only gets a vague "The expression could not be prepared to run in the
target" error message that doesn't actually tell the user what went wrong.
This patch just puts the IRForTarget errors into the status object that is
returned to the caller instead of directly printing it to the debugger. Also
updates one test that now can actually check for the error message it is
supposed to check for (instead of the default error which is all we had before).
Reviewers: JDevlieghere
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D81654
Summary:
ClangExpressionSourceCode has different ways to wrap the user expression based on
which context the expression is executed in. For example, if we're in a C++ member
function we put the expression inside a fake member function of a fake class to make the
evaluation possible. Similar things are done for Objective-C instance/static methods.
There is also a default wrapping where we put the expression in a normal function
just to make it possible to execute it.
The way we currently define which kind of wrapping the expression needs is based on
the `wrapping_language` we keep passing to the ClangExpressionSourceCode
instance. We repurposed the language type enum for that variable to distinguish the
cases above with the following mapping:
* language = C_plus_plus -> member function wrapping
* language = ObjC -> instance/static method wrapping (`is_static` distinguished between those two).
* language = C -> normal function wrapping
* all other cases like C_plus_plus11, Haskell etc. make our class a no-op that does mostly nothing.
That mapping is currently not documented and just confusing as the `language`
is unrelated to the expression language (and in the ClangUserExpression we even pretend
that it *is* the actual language, but luckily never used it for anything). Some of the code
in ClangExpressionSourceCode is also obviously thinking that this is the actual language of
the expression as it checks for non-existent cases such as `ObjC_plus_plus` which is
not part of the mapping.
This patch makes a new enum to describe the four cases above (with instance/static Objective-C
methods now being their own case). It also make that enum just a member of
ClangExpressionSourceCode instead of having to pass the same value to the class repeatedly.
This gets also rid of all the switch-case-checks for 'unknown' language such as C_plus_plus11 as this
is no longer necessary.
Reviewers: labath, JDevlieghere
Reviewed By: labath
Subscribers: abidh
Differential Revision: https://reviews.llvm.org/D80793
Summary:
It turns out that the order in which we provide completions for expressions is
nondeterministic. This leads to confusing user experience and also breaks the
reproducer tests (as two LLDB tests can go out of sync due to the
non-determinism in the completion lists)
The reason for the non-determinism is that the CompletionConsumer informs us
about decls in the order in which it finds declarations in the lookup store of
the DeclContexts it visits (mainly this snippet in SemaLookup.cpp):
``` lang=c++
// Enumerate all of the results in this context.
for (DeclContextLookupResult R :
Load ? Ctx->lookups()
: Ctx->noload_lookups(/*PreserveInternalState=*/false)) {
[...]
```
This storage of the lookup is sorted by pointer values (see the hash of
`DeclarationName`) and can therefore be non-deterministic. The LLDB code
completion consumer that receives these calls originally expected that the order
of declarations is defined by Clang, but it seems the API expects the client to
provide an order to the completions.
This patch fixes the issue as follows:
* We sort the completions we get from Clang alphabetically and also by the
priority value we get from Clang (with priority value sorting having precedence
over the alphabetical sorting)
* We make all the functions/variables that touch a completion before the sorting
const-qualified. The idea is that this should prevent that we never have
observable side-effect from touching these declarations in a non-deterministic
order (e.g., we don't try to complete the type by accident).
This way we behave like the other parts of Clang which also sort the results by
some deterministic value (usually the name or something computed from a name,
e.g., edit distance to a given string).
We most likely also need to fix the Clang code to make the loop I listed above
deterministic to prevent these issues in the future (tracked in rdar://63442513
). This wouldn't replace the functionality provided in this patch though as we
would still need the priority and overall alphabetical sorting.
Note: I had to increase the lldb-vscode completion limit to 100 as the tests
look for strings that aren't in the first 50 results anymore due to variable
names starting with letters like 'v' (which are now always shown much further
down in the list due to the alphabetical sorting).
Fixes rdar://63200995
Reviewers: JDevlieghere, clayborg
Reviewed By: JDevlieghere
Subscribers: mgrang, abidh
Differential Revision: https://reviews.llvm.org/D80292
Summary:
For ObjCInterfaceDecls, LLDB iterates over the `methods` of the interface in FindExternalVisibleDeclsByName
since commit ef423a3ba5 .
However, when LLDB calls `oid->methods()` in that function, Clang will pull in all declarations in the current
DeclContext from the current ExternalASTSource (which is again, `ClangExternalASTSourceCallbacks`). The
reason for that is that `methods()` is just a wrapper for `decls()` which is supposed to provide a list of *all*
(both currently loaded and external) decls in the DeclContext.
However, `ClangExternalASTSourceCallbacks::FindExternalLexicalDecls` doesn't implement support for ObjCInterfaceDecl,
so we don't actually add any declarations and just mark the ObjCInterfaceDecl as having no ExternalLexicalStorage.
As LLDB uses the ExternalLexicalStorage to see if it can complete a type with the ExternalASTSource, this causes
that LLDB thinks our class can't be completed any further by the ExternalASTSource
and will from on no longer make any CompleteType/FindExternalLexicalDecls calls to that decl. This essentially
renders those types unusable in the expression parser as they will always be considered incomplete.
This patch just changes the call to `methods` (which is just a `decls()` wrapper), to some ad-hoc `noload_methods`
call which is wrapping `noload_decls()`. `noload_decls()` won't trigger any calls to the ExternalASTSource, so
this prevents that ExternalLexicalStorage will be set to false.
The test for this is just adding a method to an ObjC interface. Before this patch, this unset the ExternalLexicalStorage
flag and put the interface into the state described above.
In a normal user session this situation was triggered by setting a breakpoint in a method of some ObjC class. This
caused LLDB to create the MethodDecl for that specific method and put it into the the ObjCInterfaceDecl.
Also `ObjCLanguageRuntime::LookupInCompleteClassCache` needs to be unable to resolve the type do
an actual definition when the breakpoint is set (I'm not sure how exactly this can happen, but we just
found no Type instance that had the `TypePayloadClang::IsCompleteObjCClass` flag set in its payload in
the situation where this happens. This however doesn't seem to be a regression as logic wasn't changed
from what I can see).
The module-ownership.mm test had to be changed as the only reason why the ObjC interface in that test had
it's ExternalLexicalStorage flag set to false was because of this unintended side effect. What actually happens
in the test is that ExternalLexicalStorage is first set to false in `DWARFASTParserClang::CompleteTypeFromDWARF`
when we try to complete the `SomeClass` interface, but is then the flag is set back to true once we add
the last ivar of `SomeClass` (see `SetMemberOwningModule` in `TypeSystemClang.cpp` which is called
when we add the ivar). I'll fix the code for that in a follow-up patch.
I think some of the code here needs some rethinking. LLDB and Clang shouldn't infer anything about the ExternalASTSource
and its ability to complete the current type form the `ExternalLexicalStorage` flag. We probably should
also actually provide any declarations when we get asked for the lexical decls of an ObjCInterfaceDecl. But both of those
changes are bigger (and most likely would cause us to eagerly complete more types), so those will be follow up patches
and this patch just brings us back to the state before commit ef423a3ba5 .
Fixes rdar://63584164
Reviewers: aprantl, friss, shafik
Reviewed By: aprantl, shafik
Subscribers: arphaman, abidh, JDevlieghere
Differential Revision: https://reviews.llvm.org/D80556
This reverts commit 5f88f39ab8. It broke these
three tests on the Window bot:
lldb-api :: commands/expression/completion/TestExprCompletion.py
lldb-api :: lang/cpp/scope/TestCppScope.py
lldb-api :: lang/cpp/standards/cpp11/TestCPP11Standard.py
Summary:
Currently we never enable C++14 in the expression evaluator. This enables it when the language of the program is C++14.
It seems C++17 and so on isn't yet in any of the language enums (and the DWARF standard it seems), so C++17 support will be a follow up patch.
Reviewers: labath, JDevlieghere
Reviewed By: labath, JDevlieghere
Subscribers: aprantl
Differential Revision: https://reviews.llvm.org/D80308
Summary:
When the ClangModulesDeclVendor currently fails it just prints very basic and often incomplete diagnostics without any source locations:
```
(lldb) p @import Foundation
error: while importing modules:
'foo/bar.h' file not found
could not build module 'Darwin'
[...]
```
or even just
```
(lldb) p @import Foundation
error: while importing modules:
could not build module 'Darwin'
[...]
```
These diagnostics help neither the user nor us with figuring out what is the reason for the failure.
This patch wires up a full TextDiagnosticPrinter in the ClangModulesDeclVendor and makes
sure we always return the error stream to the user when we fail to compile our modules.
Fixes rdar://63216849
Reviewers: aprantl, jdoerfert
Reviewed By: aprantl
Subscribers: JDevlieghere
Differential Revision: https://reviews.llvm.org/D79947
This method has been commented as deprecated for a while. Remove
it and replace all uses with the equivalent getCalledOperand().
I also made a few cleanups in here. For example, to removes use
of getElementType on a pointer when we could just use getFunctionType
from the call.
Differential Revision: https://reviews.llvm.org/D78882
This patch fixes a bug when synthesizing an ObjC property from
-gmodules debug info. Because the method declaration that is injected
via the non-modular property implementation is not added to the
ObjCInterfaceDecl's lookup pointer, a second copy of the accessor
would be generated when processing the ObjCPropertyDecl. This can be
avoided by finding the existing method decl in
ClangExternalASTSourceCallbacks::FindExternalVisibleDeclsByName() and
adding it to the LookupPtr.
Differential Revision: https://reviews.llvm.org/D78333
Types that came from a Clang module are nested in DW_TAG_module tags
in DWARF. This patch recreates the Clang module hierarchy in LLDB and
1;95;0csets the owning module information accordingly. My primary motivation
is to facilitate looking up per-module APINotes for individual
declarations, but this likely also has other applications.
This reapplies the previously reverted commit, but without support for
ClassTemplateSpecializations, which I'm going to look into separately.
rdar://problem/59634380
Differential Revision: https://reviews.llvm.org/D75488
Summary:
LLDB currently applies Fix-Its if they are attached to a Clang diagnostic that has the
severity "error". Fix-Its connected to warnings and other severities are supposed to
be ignored as LLDB doesn't seem to trust Clang Fix-Its in these situations.
However, LLDB also ignores all Fix-Its coming from "note:" diagnostics. These diagnostics
are usually emitted alongside other diagnostics (both warnings and errors), either to keep
a single diagnostic message shorter or because the Fix-It is in a different source line. As they
are technically their own (non-error) diagnostics, we currently are ignoring all Fix-Its associated with them.
For example, this is a possible Clang diagnostic with a Fix-It that is currently ignored:
```
error: <user expression 1>:2:10: too many arguments provided to function-like macro invocation
ToStr(0, {,})
^
<user expression 1>:1:9: macro 'ToStr' defined here
#define ToStr(x) #x
^
<user expression 1>:2:1: cannot use initializer list at the beginning of a macro argument
ToStr(0, {,})
^ ~~~~
```
We also don't store "note:" diagnostics at all, as LLDB's abstraction around the whole diagnostic
concept doesn't have such a concept. The text of "note:" diagnostics is instead
appended to the last non-note diagnostic (which is causing that there is no "note:" text in the
diagnostic above, as all the "note:" diagnostics have been appended to the first "error: ..." text).
This patch fixes the ignored Fix-Its in note-diagnostics by appending them to the last non-note
diagnostic, similar to the way we handle the text in these diagnostics.
Reviewers: JDevlieghere, jingham
Reviewed By: JDevlieghere
Subscribers: abidh
Differential Revision: https://reviews.llvm.org/D77055
Types that came from a Clang module are nested in DW_TAG_module tags
in DWARF. This patch recreates the Clang module hierarchy in LLDB and
sets the owning module information accordingly. My primary motivation
is to facilitate looking up per-module APINotes for individual
declarations, but this likely also has other applications.
rdar://problem/59634380
Differential Revision: https://reviews.llvm.org/D75488
Summary:
D73024 seems to have fixed one set crash, but it introduced another.
Namely, if a class contains a covariant method returning itself, the
logic in MaybeCompleteReturnType could cause us to attempt a recursive
import, which would result in an assertion failure in
clang::DeclContext::removeDecl.
For some reason, this only manifested itself if the class contained at
least two member variables, and the class itself was imported as a
result of a recursive covariant import.
This patch fixes the crash by not attempting to import classes which are
already completed in MaybeCompleteReturnType. However, it's not clear to
me if this is the right fix, or if this should be handled automatically
by functions lower in the stack.
Reviewers: teemperor, shafik
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D76840
LLDB only automatically applies Fix-Its from errors, but not from warnings.
Currently we only store Fix-Its from errors and then later apply all Fix-Its
we stored. This moves the filter to the application phase, so that we now
store *all* Fix-Its but only apply Fix-Its from errors later on.
This is NFC preparation for an upcoming patch.
Summary:
Currently top-level expressions won't automatically get Fix-Its applied. The reason
for that is that we only set the `m_fixed_text` member if we have a wrapping
source code (I.e. `m_source_code` is not zero and is wrapping some expressions).
This patch just always sets `m_fixed_text` to get this working.
Reviewers: labath, jingham
Reviewed By: labath
Subscribers: JDevlieghere
Differential Revision: https://reviews.llvm.org/D77042
lldbassert is the macro that takes care of passing along line/file/function
to the lldb_assert function. Let's call that instead of manually calling the
function.
There an option: EvaluateExpressionOptions::SetResultIsInternal to indicate
whether the result number should be returned to the pool or not. It
got broken when the PersistentExpressionState was refactored.
This fixes the issue and provides a test of the behavior.
Differential Revision: https://reviews.llvm.org/D76532
The nullptr check here was removed in 4ef50a33b1
when I replaced (nearly) all log->Print to LLDB_LOG calls (which automatically
check for this stuff). But it seems this one call escaped my sed call.
Currently working on a test that can cover this code path but we can revert
this until I have found one.
Most clients of SourceManager.h need to do things like turning source
locations into file & line number pairs, but this doesn't require
bringing in FileManager.h and LLVM's FS headers.
The main code change here is to sink SM::createFileID into the cpp file.
I reason that this is not performance critical because it doesn't happen
on the diagnostic path, it happens along the paths of macro expansion
(could be hot) and new includes (less hot).
Saves some includes:
309 - /usr/local/google/home/rnk/llvm-project/clang/include/clang/Basic/FileManager.h
272 - /usr/local/google/home/rnk/llvm-project/clang/include/clang/Basic/FileSystemOptions.h
271 - /usr/local/google/home/rnk/llvm-project/llvm/include/llvm/Support/VirtualFileSystem.h
267 - /usr/local/google/home/rnk/llvm-project/llvm/include/llvm/Support/FileSystem.h
266 - /usr/local/google/home/rnk/llvm-project/llvm/include/llvm/Support/Chrono.h
Differential Revision: https://reviews.llvm.org/D75406
Module.h takes 86ms to parse, mostly parsing the class itself. Avoid it
if possible. ASTContext.h depends on ExternalASTSource.h.
A few NFC changes were needed to make this possible:
- Move ASTSourceDescriptor to Module.h. This needs Module to be
complete, and seems more related to modules and AST files than
external AST sources.
- Move "import complete" bit from Module* pointer int pair to
NextLocalImport pointer. Required because PointerIntPair<Module*,...>
requires Module to be complete, and now it may not be.
Reviewed By: aaron.ballman, hans
Differential Revision: https://reviews.llvm.org/D75784
The indexes need to start at 0 but in D74951 I removed the first parameter
and didn't decrement all the indexes. This patch at least makes sure that
LLDB logging no longer crashes (but it still deadlocks).
The GetOffset documentation was copied from the function above
so I completely deleted that one. The rest was just outdated
documentation that didn't keep up with renamed or changed
function parameters/return types.
This member is for some reason initialized in ClangASTSource::FindExternalVisibleDecls
so all other functions using this member dereference a nullptr unless we
call this function before that. Let's just initialize this in the constructor.
This should be NFC as the only side effect is that we don't reset the namespace map
when calling ClangASTSource::FindExternalVisibleDecls multiple times (and we never
call this function multiple times for one NameSearchContext from what I can see).
The size of NameSearchContext isn't important as we never store it and rarely
allocate more than a few. This way we also don't have to use the memset to
initialize these fields to zero.
Summary:
We have a lot of code in our lookup code to pass around `current_id` counters which end up in our logs like this:
```
AOCTV::FT [234] Found XYZ
```
This patch removes all of this code because:
* I'm splitting up all humongous functions, so I need to write more and more boilerplate to pass around these ids.
* I never saw any similar counters in the LLDB/LLVM code base.
* They're essentially globals and the last thing we need in LLDB is even more global state.
* They're not really useful when readings logs. It doesn't help that there isn't just 1 or 2 counters, but 12 (!) unique counters. I always thought that if I see two identical counter values in those brackets it's the same lookup request, but it seems that's only true by accident (and you can't know which of the 12 counters is actually printed without reading the code). The only time I know I can trust the counters is when it's obvious from the log that it's the same counter like in the log below, but then why have the counters in the first place?
```
LayoutRecordType[28] on (ASTContext*)0x00007FFA1C840200 'scratch ASTContext' for (RecordDecl*)0x00007FFA0AAE8CF0 [name = '__tree']
LRT[28] returned:
LRT[28] Original = (RecordDecl*)%p
LRT[28] Size = %lld
LRT[28] Alignment = %lld
LRT[28] Fields:
LRT[28] (FieldDecl*)0x00007FFA1A13B1D0, Name = '__begin_node_', Offset = 0 bits
LRT[28] (FieldDecl*)0x00007FFA1C08FD30, Name = '__pair1_', Offset = 64 bits
LRT[28] (FieldDecl*)0x00007FFA1C061210, Name = '__pair3_', Offset = 128 bits
LRT[28] Bases:
```
Reviewers: labath, shafik, JDevlieghere
Reviewed By: labath, shafik, JDevlieghere
Subscribers: abidh, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D74951
Summary:
All of our lookup APIs either use `CompilerDeclContext &` or `CompilerDeclContext *` semi-randomly it seems.
This leads to us constantly converting between those two types (and doing nullptr checks when going from
pointer to reference). It also leads to the confusing situation where we have two possible ways to express
that we don't have a CompilerDeclContex: either a nullptr or an invalid CompilerDeclContext (aka a default
constructed CompilerDeclContext).
This moves all APIs to use references and gets rid of all the nullptr checks and conversions.
Reviewers: labath, mib, shafik
Reviewed By: labath, shafik
Subscribers: shafik, arphaman, abidh, JDevlieghere, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D74607
LLDB has a few different styles of header guards and they're not very
consistent because things get moved around or copy/pasted. This patch
unifies the header guards across LLDB and converts everything to match
LLVM's style.
Differential revision: https://reviews.llvm.org/D74743
This patch changes the way we initialize and terminate the plugins in
the system initializer. It uses an approach similar to LLVM's
TARGETS_TO_BUILD with a def file that enumerates the plugins.
The previously landed patch got reverted because it was lacking:
(1) A plugin definition for the Objective-C language runtime,
(2) The dependency between the Static and WASM dynamic loader,
(3) Explicit initialization of ScriptInterpreterNone for lldb-test.
All issues have been addressed in this patch.
Differential revision: https://reviews.llvm.org/D73067
This patch changes the way we initialize and terminate the plugins in
the system initializer. It uses an approach similar to LLVM's
TARGETS_TO_BUILD with a def file that enumerates the plugins.
Differential revision: https://reviews.llvm.org/D73067
Sema::RequireCompleteTypeImpl is supposed to have an assert that checks that the
SourceLocation that is passed in is always valid. It's currently commented out, but
as soon as this assert goes active, nearly every LLDB expression will start crashing as
we always pass in an invalid SourceLocation from the ASTResultSynthesizer.
This patch just passes in the valid SourceLocation of the expression (which is
the SourceLocation where the complete type is required) to prevent that from happening.
Summary:
lldb-forward.h is convenient in many ways, but having clang-based
class forward declarations in there makes it easy to proliferate uses of clang
outside of plugins. Removing them makes you much more conscious of when
you're using something from clang and marks where we're using things
from clang in non-plugins.
Differential Revision: https://reviews.llvm.org/D73935
Summary:
I think that there are very few things from clang that actually need forward
declaration, so not having a ClangForward header makes sense.
Differential Revision: https://reviews.llvm.org/D73827
LanguageRuntime::GetOverrideExprOptions is specific to clang and was
only overridden in RenderScriptRuntime. LanguageRuntime in shouldn't
have any knowledge of clang, so remove it from LanguageRuntime and leave
it only in RenderScriptRuntime.
Summary:
This change represents the move of ClangASTImporter, ClangASTMetadata,
ClangExternalASTSourceCallbacks, ClangUtil, CxxModuleHandler, and
TypeSystemClang from lldbSource to lldbPluginExpressionParserClang.h
This explicitly removes knowledge of clang internals from lldbSymbol,
moving towards a more generic core implementation of lldb.
Reviewers: JDevlieghere, davide, aprantl, teemperor, clayborg, labath, jingham, shafik
Subscribers: emaste, mgorny, arphaman, jfb, usaxena95, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D73661
A ClangASTSource always has a ClangASTImporter. Let's remove these sporadic
checks with a single assert during construction. They were added originally
for the modern-type-lookup mode that didn't use a ClangASTImporter in there.
This adds a conversion function from clang::Decl to CompilerDecl. It checks
that the TypeSystemClang in the CompilerDecl actually fits to the clang::Decl
AST during creation, thus preventing the creation of CompilerDecl instances with
inconsistent state.
Similar to previous commits, this just replaces the lookup in the
global map with the reference to the TypeSystemClang instance we already
have in this context.
Use the std::string conversion operator introduced in
d7049213d0. The SmallString in the log
statement doesn't require conversion at all when using the variadic log
macro.
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.
Target is one of the classes responsible for vending ClangASTImporter.
Target doesn't need to know anything about ClangASTImporter, so if we
instead have ClangPersistentVariables vend it, we can preserve
existing behavior while improving layering and removing dependencies
from non-plugins to plugins.
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
Summary:
This commit renames ClangASTContext to TypeSystemClang to better reflect what this class is actually supposed to do
(implement the TypeSystem interface for Clang). It also gets rid of the very confusing situation that we have both a
`clang::ASTContext` and a `ClangASTContext` in clang (which sometimes causes Clang people to think I'm fiddling
with Clang's ASTContext when I'm actually just doing LLDB work).
I also have plans to potentially have multiple clang::ASTContext instances associated with one ClangASTContext so
the ASTContext naming will then become even more confusing to people.
Reviewers: #lldb, aprantl, shafik, clayborg, labath, JDevlieghere, davide, espindola, jdoerfert, xiaobai
Reviewed By: clayborg, labath, xiaobai
Subscribers: wuzish, emaste, nemanjai, mgorny, kbarton, MaskRay, arphaman, jfb, usaxena95, jingham, xiaobai, abidh, JDevlieghere, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D72684
Summary:
I often struggle to understand what exactly LLDB is doing by looking at our expression evaluation logging as our messages look like this:
```
CompleteTagDecl[2] on (ASTContext*)0x7ff31f01d240 Completing (TagDecl*)0x7ff31f01d568 named DeclName1
```
From the log messages it's unclear what this ASTContext is. Is it the scratch context, the expression context, some decl vendor context or a context from a module?
The pointer value isn't helpful for anyone unless I'm in a debugger where I could inspect the memory at the address. But even with a debugger it's not easy to
figure out what this ASTContext is without having deeper understanding about all the different ASTContext instances in LLDB (e.g., valid SourceLocation
from the file system usually means that this is the Objective-C decl vendor, a file name from multiple expressions is probably the scratch context, etc.).
This patch adds a name field to ClangASTContext instances that we can use to store a name which can be used for logging and debugging. With this
our log messages now look like this:
```
CompleteTagDecl[2] on scratch ASTContext. Completing (TagDecl*)0x7ff31f01d568 named Foo
```
We can now also just print a ClangASTContext from the debugger and see a useful name in the `m_display_name` field, e.g.
```
m_display_name = "AST for /Users/user/test/main.o";
```
Reviewers: shafik, labath, JDevlieghere, mib
Reviewed By: shafik
Subscribers: clayborg, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D72391
Summary:
This code is handling debug info paths starting with /proc/self/cwd,
which is one of the mechanisms people use to obtain "relocatable" debug
info (the idea being that one starts the debugger with an appropriate
cwd and things "just work").
Instead of resolving the symlinks inside DWARFUnit, we can do the same
thing more elegantly by hooking into the existing Module path remapping
code. Since llvm::DWARFUnit does not support any similar functionality,
doing things this way is also a step towards unifying llvm and lldb
dwarf parsers.
Reviewers: JDevlieghere, aprantl, clayborg, jdoerfert
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D71770
Summary:
This change is connected with
https://reviews.llvm.org/D69843
In large codebases, we sometimes see Module::FindFunctions (when called from
ClangExpressionDeclMap::FindExternalVisibleDecls) returning huge amounts of
functions.
In current fix I trying to return only function_fullnames from ManualDWARFIndex::GetFunctions when eFunctionNameTypeFull is passed as argument.
Reviewers: labath, jarin, aprantl
Reviewed By: labath
Subscribers: shafik, clayborg, teemperor, arphaman, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D70846
When trying to interpret an expression with a function call, if the
process hasn't been launched, the expression fails to be interpreted
and the user gets the following error message:
```error: Can't run the expression locally```
This message doesn't explain why the expression failed to be
interpreted, that's why this patch improves the error message that is
displayed when trying to run an expression while no process is running.
rdar://11991708
Differential Revision: https://reviews.llvm.org/D72510
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
Summary:
This is a port of D67803 that was about preventing indirect importing to our scratch context when evaluating expressions.
D67803 already has a pretty long explanation of how this works, but the idea is that instead
of importing declarations indirectly over the expression AST (i.e., Debug info AST -> Expression AST -> scratch AST)
we instead directly import the declaration from the debug info AST to the scratch AST.
The difference from D67803 is that here we have to do this in the ASTImporterDelegate (which is our ASTImporter
subclass we use in LLDB). It has the same information as the ExternalASTMerger in D67803 as it can access the
ClangASTImporter (which also keeps track of where Decls originally came from).
With this patch we can also delete the FieldDecl stealing hack in the ClangASTSource (this was only necessary as the
indirect imports caused the creation of duplicate Record declarations but we needed the fields in the Record decl
we originally found in the scratch ASTContext).
This also fixes the current gmodules failures where we fail to find std::vector fields after an indirect import
over the expression AST (where it seems even our FieldDecl stealing hack can't save us from).
Reviewers: shafik, aprantl
Reviewed By: shafik
Subscribers: JDevlieghere, lldb-commits, mib, labath, friss
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D72507
GetPersistentExpressionStateForLanguage() can return a nullptr if it
cannot construct a typesystem. This patch adds missing nullptr checks
at all uses.
Inspired by rdar://problem/58317195
Differential Revision: https://reviews.llvm.org/D72413
Summary: There are a few places in LLDB where we do a `reinterpret_cast` for conversions that we could also do with `static_cast`. This patch moves all this code to `static_cast`.
Reviewers: shafik, JDevlieghere, labath
Reviewed By: labath
Subscribers: arphaman, usaxena95, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D72161
There is no clang::Action anymore so our forward decl for it and the obsolete pointer in the
ASTStructExtractor can both go (that code anyway didn't do anything).
LLDB frequently converts QualType to CompilerType. This is currently done like this:
result = CompilerType(this, qual_type_var.getAsOpaquePtr())
There are a few shortcomings in this current approach:
1. CompilerType's constructor takes a void* pointer so it isn't type safe.
2. We can't add any sanity checks to the CompilerType constructor (e.g. that the type
actually belongs to the passed ClangASTContext) without expanding the TypeSystem API.
3. The logic for converting QualType->CompilerType is spread out over all of LLDB so
changing it is difficult (e.g., what if we want to just pass the type ptr and not the
1type_ptr | qual_flags1 to CompilerType).
This patch adds a `ClangASTContext::GetType` function similar to the other GetTypeForDecl
functions that does this conversion in a type safe way.
It also adds a sanity check for Tag-based types that the type actually belongs to the
current ClangASTContext (Types don't seem to know their ASTContext, so we have to
workaround by looking at the decl for the underlying TagDecl. This doesn't cover all types
we construct but it's better than no sanity check).
CompilerType has no virtual functions and no statements in its constructors,
so we can simplify this code. This also allows Clang to emit unused variable warnings
for CompilerType, so I also removed one unused variable that otherwise causes -Werror
builds to fail.
We try to build a CompilerType from the persistent decls so we need
a ClangASTContext. With this patch the ClangPersistentVariables store
the associated ClangASTContext of the persistent decls (which is
always the scratch ClangASTContext) and no longer call GetASTContext
to map back from clang::ASTContext to ClangASTContext.
Instead of returning NamedDecls and then calling GetASTContext
to find back the ClangASTContext we used can just implement the
FindDecl variant that returns CompilerDecls (and implement the
other function by throwing away the ClangASTContext part of the
compiler decl).
Raphael Isemann