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llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
Matheus Izvekov 91cdd35008
[clang] Improve nested name specifier AST representation (#147835) 
This is a major change on how we represent nested name qualifications in
the AST.

* The nested name specifier itself and how it's stored is changed. The
prefixes for types are handled within the type hierarchy, which makes
canonicalization for them super cheap, no memory allocation required.
Also translating a type into nested name specifier form becomes a no-op.
An identifier is stored as a DependentNameType. The nested name
specifier gains a lightweight handle class, to be used instead of
passing around pointers, which is similar to what is implemented for
TemplateName. There is still one free bit available, and this handle can
be used within a PointerUnion and PointerIntPair, which should keep
bit-packing aficionados happy.
* The ElaboratedType node is removed, all type nodes in which it could
previously apply to can now store the elaborated keyword and name
qualifier, tail allocating when present.
* TagTypes can now point to the exact declaration found when producing
these, as opposed to the previous situation of there only existing one
TagType per entity. This increases the amount of type sugar retained,
and can have several applications, for example in tracking module
ownership, and other tools which care about source file origins, such as
IWYU. These TagTypes are lazily allocated, in order to limit the
increase in AST size.

This patch offers a great performance benefit.

It greatly improves compilation time for
[stdexec](https://github.com/NVIDIA/stdexec). For one datapoint, for
`test_on2.cpp` in that project, which is the slowest compiling test,
this patch improves `-c` compilation time by about 7.2%, with the
`-fsyntax-only` improvement being at ~12%.

This has great results on compile-time-tracker as well:

![image](https://github.com/user-attachments/assets/700dce98-2cab-4aa8-97d1-b038c0bee831)

This patch also further enables other optimziations in the future, and
will reduce the performance impact of template specialization resugaring
when that lands.

It has some other miscelaneous drive-by fixes.

About the review: Yes the patch is huge, sorry about that. Part of the
reason is that I started by the nested name specifier part, before the
ElaboratedType part, but that had a huge performance downside, as
ElaboratedType is a big performance hog. I didn't have the steam to go
back and change the patch after the fact.

There is also a lot of internal API changes, and it made sense to remove
ElaboratedType in one go, versus removing it from one type at a time, as
that would present much more churn to the users. Also, the nested name
specifier having a different API avoids missing changes related to how
prefixes work now, which could make existing code compile but not work.

How to review: The important changes are all in
`clang/include/clang/AST` and `clang/lib/AST`, with also important
changes in `clang/lib/Sema/TreeTransform.h`.

The rest and bulk of the changes are mostly consequences of the changes
in API.

PS: TagType::getDecl is renamed to `getOriginalDecl` in this patch, just
for easier to rebasing. I plan to rename it back after this lands.

Fixes #136624
Fixes https://github.com/llvm/llvm-project/issues/43179
Fixes https://github.com/llvm/llvm-project/issues/68670
Fixes https://github.com/llvm/llvm-project/issues/92757
2025-08-09 05:06:53 -03:00

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//===-- ClangASTSource.cpp ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ClangASTSource.h"
#include "ClangDeclVendor.h"
#include "ClangModulesDeclVendor.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Symbol/CompilerDeclContext.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/TaggedASTType.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "clang/AST/ASTContext.h"
#include "clang/Basic/SourceManager.h"
#include "Plugins/ExpressionParser/Clang/ClangUtil.h"
#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include <memory>
#include <vector>
using namespace clang;
using namespace lldb_private;
// Scoped class that will remove an active lexical decl from the set when it
// goes out of scope.
namespace {
class ScopedLexicalDeclEraser {
public:
ScopedLexicalDeclEraser(std::set<const clang::Decl *> &decls,
const clang::Decl *decl)
: m_active_lexical_decls(decls), m_decl(decl) {}
~ScopedLexicalDeclEraser() { m_active_lexical_decls.erase(m_decl); }
private:
std::set<const clang::Decl *> &m_active_lexical_decls;
const clang::Decl *m_decl;
};
}
ClangASTSource::ClangASTSource(
const lldb::TargetSP &target,
const std::shared_ptr<ClangASTImporter> &importer)
: m_lookups_enabled(false), m_target(target), m_ast_context(nullptr),
m_ast_importer_sp(importer), m_active_lexical_decls(),
m_active_lookups() {
assert(m_ast_importer_sp && "No ClangASTImporter passed to ClangASTSource?");
}
void ClangASTSource::InstallASTContext(TypeSystemClang &clang_ast_context) {
m_ast_context = &clang_ast_context.getASTContext();
m_clang_ast_context = &clang_ast_context;
m_file_manager = &m_ast_context->getSourceManager().getFileManager();
m_ast_importer_sp->InstallMapCompleter(m_ast_context, *this);
}
ClangASTSource::~ClangASTSource() {
m_ast_importer_sp->ForgetDestination(m_ast_context);
if (!m_target)
return;
// Unregister the current ASTContext as a source for all scratch
// ASTContexts in the ClangASTImporter. Without this the scratch AST might
// query the deleted ASTContext for additional type information.
// We unregister from *all* scratch ASTContexts in case a type got exported
// to a scratch AST that isn't the best fitting scratch ASTContext.
lldb::TypeSystemClangSP scratch_ts_sp = ScratchTypeSystemClang::GetForTarget(
*m_target, ScratchTypeSystemClang::DefaultAST, false);
if (!scratch_ts_sp)
return;
ScratchTypeSystemClang *default_scratch_ast =
llvm::cast<ScratchTypeSystemClang>(scratch_ts_sp.get());
// Unregister from the default scratch AST (and all sub-ASTs).
default_scratch_ast->ForgetSource(m_ast_context, *m_ast_importer_sp);
}
void ClangASTSource::StartTranslationUnit(ASTConsumer *Consumer) {
if (!m_ast_context)
return;
m_ast_context->getTranslationUnitDecl()->setHasExternalVisibleStorage();
m_ast_context->getTranslationUnitDecl()->setHasExternalLexicalStorage();
}
// The core lookup interface.
bool ClangASTSource::FindExternalVisibleDeclsByName(
const DeclContext *decl_ctx, DeclarationName clang_decl_name,
const clang::DeclContext *original_dc) {
if (!m_ast_context) {
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
std::string decl_name(clang_decl_name.getAsString());
switch (clang_decl_name.getNameKind()) {
// Normal identifiers.
case DeclarationName::Identifier: {
clang::IdentifierInfo *identifier_info =
clang_decl_name.getAsIdentifierInfo();
if (!identifier_info || identifier_info->getBuiltinID() != 0) {
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
} break;
// Operator names.
case DeclarationName::CXXOperatorName:
case DeclarationName::CXXLiteralOperatorName:
break;
// Using directives found in this context.
// Tell Sema we didn't find any or we'll end up getting asked a *lot*.
case DeclarationName::CXXUsingDirective:
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector: {
llvm::SmallVector<NamedDecl *, 1> method_decls;
NameSearchContext method_search_context(*m_clang_ast_context, method_decls,
clang_decl_name, decl_ctx);
FindObjCMethodDecls(method_search_context);
SetExternalVisibleDeclsForName(decl_ctx, clang_decl_name, method_decls);
return (method_decls.size() > 0);
}
// These aren't possible in the global context.
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
case DeclarationName::CXXDeductionGuideName:
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
if (!GetLookupsEnabled()) {
// Wait until we see a '$' at the start of a name before we start doing any
// lookups so we can avoid lookup up all of the builtin types.
if (!decl_name.empty() && decl_name[0] == '$') {
SetLookupsEnabled(true);
} else {
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
}
ConstString const_decl_name(decl_name.c_str());
const char *uniqued_const_decl_name = const_decl_name.GetCString();
if (m_active_lookups.find(uniqued_const_decl_name) !=
m_active_lookups.end()) {
// We are currently looking up this name...
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
m_active_lookups.insert(uniqued_const_decl_name);
llvm::SmallVector<NamedDecl *, 4> name_decls;
NameSearchContext name_search_context(*m_clang_ast_context, name_decls,
clang_decl_name, decl_ctx);
FindExternalVisibleDecls(name_search_context);
SetExternalVisibleDeclsForName(decl_ctx, clang_decl_name, name_decls);
m_active_lookups.erase(uniqued_const_decl_name);
return (name_decls.size() != 0);
}
TagDecl *ClangASTSource::FindCompleteType(const TagDecl *decl) {
Log *log = GetLog(LLDBLog::Expressions);
if (const NamespaceDecl *namespace_context =
dyn_cast<NamespaceDecl>(decl->getDeclContext())) {
ClangASTImporter::NamespaceMapSP namespace_map =
m_ast_importer_sp->GetNamespaceMap(namespace_context);
if (!namespace_map)
return nullptr;
LLDB_LOGV(log, " CTD Inspecting namespace map{0:x} ({1} entries)",
namespace_map.get(), namespace_map->size());
for (const ClangASTImporter::NamespaceMapItem &item : *namespace_map) {
LLDB_LOG(log, " CTD Searching namespace {0} in module {1}",
item.second.GetName(), item.first->GetFileSpec().GetFilename());
ConstString name(decl->getName());
// Create a type matcher using the CompilerDeclContext for the namespace
// as the context (item.second) and search for the name inside of this
// context.
TypeQuery query(item.second, name);
TypeResults results;
item.first->FindTypes(query, results);
for (const lldb::TypeSP &type_sp : results.GetTypeMap().Types()) {
CompilerType clang_type(type_sp->GetFullCompilerType());
if (!ClangUtil::IsClangType(clang_type))
continue;
const TagType *tag_type =
ClangUtil::GetQualType(clang_type)->getAs<TagType>();
if (!tag_type)
continue;
TagDecl *candidate_tag_decl =
tag_type->getOriginalDecl()->getDefinitionOrSelf();
if (TypeSystemClang::GetCompleteDecl(
&candidate_tag_decl->getASTContext(), candidate_tag_decl))
return candidate_tag_decl;
}
}
} else {
const ModuleList &module_list = m_target->GetImages();
// Create a type matcher using a CompilerDecl. Each TypeSystem class knows
// how to fill out a CompilerContext array using a CompilerDecl.
TypeQuery query(CompilerDecl(m_clang_ast_context, (void *)decl));
TypeResults results;
module_list.FindTypes(nullptr, query, results);
for (const lldb::TypeSP &type_sp : results.GetTypeMap().Types()) {
CompilerType clang_type(type_sp->GetFullCompilerType());
if (!ClangUtil::IsClangType(clang_type))
continue;
const TagType *tag_type =
ClangUtil::GetQualType(clang_type)->getAs<TagType>();
if (!tag_type)
continue;
TagDecl *candidate_tag_decl =
tag_type->getOriginalDecl()->getDefinitionOrSelf();
if (TypeSystemClang::GetCompleteDecl(&candidate_tag_decl->getASTContext(),
candidate_tag_decl))
return candidate_tag_decl;
}
}
return nullptr;
}
void ClangASTSource::CompleteType(TagDecl *tag_decl) {
Log *log = GetLog(LLDBLog::Expressions);
if (log) {
LLDB_LOG(log,
" CompleteTagDecl on (ASTContext*){0} Completing "
"(TagDecl*){1:x} named {2}",
m_clang_ast_context->getDisplayName(), tag_decl,
tag_decl->getName());
LLDB_LOG(log, " CTD Before:\n{0}", ClangUtil::DumpDecl(tag_decl));
}
auto iter = m_active_lexical_decls.find(tag_decl);
if (iter != m_active_lexical_decls.end())
return;
m_active_lexical_decls.insert(tag_decl);
ScopedLexicalDeclEraser eraser(m_active_lexical_decls, tag_decl);
if (!m_ast_importer_sp->CompleteTagDecl(tag_decl)) {
// We couldn't complete the type. Maybe there's a definition somewhere
// else that can be completed.
if (TagDecl *alternate = FindCompleteType(tag_decl))
m_ast_importer_sp->CompleteTagDeclWithOrigin(tag_decl, alternate);
}
LLDB_LOG(log, " [CTD] After:\n{0}", ClangUtil::DumpDecl(tag_decl));
}
void ClangASTSource::CompleteType(clang::ObjCInterfaceDecl *interface_decl) {
Log *log = GetLog(LLDBLog::Expressions);
LLDB_LOG(log,
" [CompleteObjCInterfaceDecl] on (ASTContext*){0:x} '{1}' "
"Completing an ObjCInterfaceDecl named {2}",
m_ast_context, m_clang_ast_context->getDisplayName(),
interface_decl->getName());
LLDB_LOG(log, " [COID] Before:\n{0}",
ClangUtil::DumpDecl(interface_decl));
ClangASTImporter::DeclOrigin original = m_ast_importer_sp->GetDeclOrigin(interface_decl);
if (original.Valid()) {
if (ObjCInterfaceDecl *original_iface_decl =
dyn_cast<ObjCInterfaceDecl>(original.decl)) {
ObjCInterfaceDecl *complete_iface_decl =
GetCompleteObjCInterface(original_iface_decl);
if (complete_iface_decl && (complete_iface_decl != original_iface_decl)) {
m_ast_importer_sp->SetDeclOrigin(interface_decl, complete_iface_decl);
}
}
}
m_ast_importer_sp->CompleteObjCInterfaceDecl(interface_decl);
if (interface_decl->getSuperClass() &&
interface_decl->getSuperClass() != interface_decl)
CompleteType(interface_decl->getSuperClass());
LLDB_LOG(log, " [COID] After:");
LLDB_LOG(log, " [COID] {0}", ClangUtil::DumpDecl(interface_decl));
}
clang::ObjCInterfaceDecl *ClangASTSource::GetCompleteObjCInterface(
const clang::ObjCInterfaceDecl *interface_decl) {
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
return nullptr;
ObjCLanguageRuntime *language_runtime(ObjCLanguageRuntime::Get(*process));
if (!language_runtime)
return nullptr;
ConstString class_name(interface_decl->getNameAsString().c_str());
lldb::TypeSP complete_type_sp(
language_runtime->LookupInCompleteClassCache(class_name));
if (!complete_type_sp)
return nullptr;
TypeFromUser complete_type =
TypeFromUser(complete_type_sp->GetFullCompilerType());
lldb::opaque_compiler_type_t complete_opaque_type =
complete_type.GetOpaqueQualType();
if (!complete_opaque_type)
return nullptr;
const clang::Type *complete_clang_type =
QualType::getFromOpaquePtr(complete_opaque_type).getTypePtr();
const ObjCInterfaceType *complete_interface_type =
dyn_cast<ObjCInterfaceType>(complete_clang_type);
if (!complete_interface_type)
return nullptr;
ObjCInterfaceDecl *complete_iface_decl(complete_interface_type->getDecl());
return complete_iface_decl;
}
void ClangASTSource::FindExternalLexicalDecls(
const DeclContext *decl_context,
llvm::function_ref<bool(Decl::Kind)> predicate,
llvm::SmallVectorImpl<Decl *> &decls) {
Log *log = GetLog(LLDBLog::Expressions);
const Decl *context_decl = dyn_cast<Decl>(decl_context);
if (!context_decl)
return;
auto iter = m_active_lexical_decls.find(context_decl);
if (iter != m_active_lexical_decls.end())
return;
m_active_lexical_decls.insert(context_decl);
ScopedLexicalDeclEraser eraser(m_active_lexical_decls, context_decl);
if (log) {
if (const NamedDecl *context_named_decl = dyn_cast<NamedDecl>(context_decl))
LLDB_LOG(log,
"FindExternalLexicalDecls on (ASTContext*){0:x} '{1}' in "
"'{2}' ({3}Decl*){4}",
m_ast_context, m_clang_ast_context->getDisplayName(),
context_named_decl->getNameAsString().c_str(),
context_decl->getDeclKindName(),
static_cast<const void *>(context_decl));
else if (context_decl)
LLDB_LOG(log,
"FindExternalLexicalDecls on (ASTContext*){0:x} '{1}' in "
"({2}Decl*){3}",
m_ast_context, m_clang_ast_context->getDisplayName(),
context_decl->getDeclKindName(),
static_cast<const void *>(context_decl));
else
LLDB_LOG(log,
"FindExternalLexicalDecls on (ASTContext*){0:x} '{1}' in a "
"NULL context",
m_ast_context, m_clang_ast_context->getDisplayName());
}
ClangASTImporter::DeclOrigin original = m_ast_importer_sp->GetDeclOrigin(context_decl);
if (!original.Valid())
return;
LLDB_LOG(log, " FELD Original decl (ASTContext*){0:x} (Decl*){1:x}:\n{2}",
static_cast<void *>(original.ctx),
static_cast<void *>(original.decl),
ClangUtil::DumpDecl(original.decl));
if (ObjCInterfaceDecl *original_iface_decl =
dyn_cast<ObjCInterfaceDecl>(original.decl)) {
ObjCInterfaceDecl *complete_iface_decl =
GetCompleteObjCInterface(original_iface_decl);
if (complete_iface_decl && (complete_iface_decl != original_iface_decl)) {
original.decl = complete_iface_decl;
original.ctx = &complete_iface_decl->getASTContext();
m_ast_importer_sp->SetDeclOrigin(context_decl, complete_iface_decl);
}
}
if (TagDecl *original_tag_decl = dyn_cast<TagDecl>(original.decl)) {
ExternalASTSource *external_source = original.ctx->getExternalSource();
if (external_source)
external_source->CompleteType(original_tag_decl);
}
const DeclContext *original_decl_context =
dyn_cast<DeclContext>(original.decl);
if (!original_decl_context)
return;
// Indicates whether we skipped any Decls of the original DeclContext.
bool SkippedDecls = false;
for (Decl *decl : original_decl_context->decls()) {
// The predicate function returns true if the passed declaration kind is
// the one we are looking for.
// See clang::ExternalASTSource::FindExternalLexicalDecls()
if (predicate(decl->getKind())) {
if (log) {
std::string ast_dump = ClangUtil::DumpDecl(decl);
if (const NamedDecl *context_named_decl =
dyn_cast<NamedDecl>(context_decl))
LLDB_LOG(log, " FELD Adding [to {0}Decl {1}] lexical {2}Decl {3}",
context_named_decl->getDeclKindName(),
context_named_decl->getName(), decl->getDeclKindName(),
ast_dump);
else
LLDB_LOG(log, " FELD Adding lexical {0}Decl {1}",
decl->getDeclKindName(), ast_dump);
}
Decl *copied_decl = CopyDecl(decl);
if (!copied_decl)
continue;
// FIXME: We should add the copied decl to the 'decls' list. This would
// add the copied Decl into the DeclContext and make sure that we
// correctly propagate that we added some Decls back to Clang.
// By leaving 'decls' empty we incorrectly return false from
// DeclContext::LoadLexicalDeclsFromExternalStorage which might cause
// lookup issues later on.
// We can't just add them for now as the ASTImporter already added the
// decl into the DeclContext and this would add it twice.
if (FieldDecl *copied_field = dyn_cast<FieldDecl>(copied_decl)) {
QualType copied_field_type = copied_field->getType();
m_ast_importer_sp->RequireCompleteType(copied_field_type);
}
} else {
SkippedDecls = true;
}
}
// CopyDecl may build a lookup table which may set up ExternalLexicalStorage
// to false. However, since we skipped some of the external Decls we must
// set it back!
if (SkippedDecls) {
decl_context->setHasExternalLexicalStorage(true);
// This sets HasLazyExternalLexicalLookups to true. By setting this bit we
// ensure that the lookup table is rebuilt, which means the external source
// is consulted again when a clang::DeclContext::lookup is called.
const_cast<DeclContext *>(decl_context)->setMustBuildLookupTable();
}
}
void ClangASTSource::FindExternalVisibleDecls(NameSearchContext &context) {
assert(m_ast_context);
const ConstString name(context.m_decl_name.getAsString().c_str());
Log *log = GetLog(LLDBLog::Expressions);
if (log) {
if (!context.m_decl_context)
LLDB_LOG(log,
"ClangASTSource::FindExternalVisibleDecls on "
"(ASTContext*){0:x} '{1}' for '{2}' in a NULL DeclContext",
m_ast_context, m_clang_ast_context->getDisplayName(), name);
else if (const NamedDecl *context_named_decl =
dyn_cast<NamedDecl>(context.m_decl_context))
LLDB_LOG(log,
"ClangASTSource::FindExternalVisibleDecls on "
"(ASTContext*){0:x} '{1}' for '{2}' in '{3}'",
m_ast_context, m_clang_ast_context->getDisplayName(), name,
context_named_decl->getName());
else
LLDB_LOG(log,
"ClangASTSource::FindExternalVisibleDecls on "
"(ASTContext*){0:x} '{1}' for '{2}' in a '{3}'",
m_ast_context, m_clang_ast_context->getDisplayName(), name,
context.m_decl_context->getDeclKindName());
}
if (isa<NamespaceDecl>(context.m_decl_context)) {
LookupInNamespace(context);
} else if (isa<ObjCInterfaceDecl>(context.m_decl_context)) {
FindObjCPropertyAndIvarDecls(context);
} else if (!isa<TranslationUnitDecl>(context.m_decl_context)) {
// we shouldn't be getting FindExternalVisibleDecls calls for these
return;
} else {
CompilerDeclContext namespace_decl;
LLDB_LOG(log, " CAS::FEVD Searching the root namespace");
FindExternalVisibleDecls(context, lldb::ModuleSP(), namespace_decl);
}
if (!context.m_namespace_map->empty()) {
if (log && log->GetVerbose())
LLDB_LOG(log, " CAS::FEVD Registering namespace map {0:x} ({1} entries)",
context.m_namespace_map.get(), context.m_namespace_map->size());
NamespaceDecl *clang_namespace_decl =
AddNamespace(context, context.m_namespace_map);
if (clang_namespace_decl)
clang_namespace_decl->setHasExternalVisibleStorage();
}
}
clang::Sema *ClangASTSource::getSema() {
return m_clang_ast_context->getSema();
}
bool ClangASTSource::IgnoreName(const ConstString name,
bool ignore_all_dollar_names) {
static const ConstString id_name("id");
static const ConstString Class_name("Class");
if (m_ast_context->getLangOpts().ObjC)
if (name == id_name || name == Class_name)
return true;
StringRef name_string_ref = name.GetStringRef();
// The ClangASTSource is not responsible for finding $-names.
return name_string_ref.empty() ||
(ignore_all_dollar_names && name_string_ref.starts_with("$")) ||
name_string_ref.starts_with("_$");
}
void ClangASTSource::FindExternalVisibleDecls(
NameSearchContext &context, lldb::ModuleSP module_sp,
CompilerDeclContext &namespace_decl) {
assert(m_ast_context);
Log *log = GetLog(LLDBLog::Expressions);
SymbolContextList sc_list;
const ConstString name(context.m_decl_name.getAsString().c_str());
if (IgnoreName(name, true))
return;
if (!m_target)
return;
FillNamespaceMap(context, module_sp, namespace_decl);
if (context.m_found_type)
return;
lldb::TypeSP type_sp;
TypeResults results;
if (module_sp && namespace_decl) {
// Match the name in the specified decl context.
TypeQuery query(namespace_decl, name, TypeQueryOptions::e_find_one);
module_sp->FindTypes(query, results);
type_sp = results.GetFirstType();
} else {
// Match the exact name of the type at the root level.
TypeQuery query(name.GetStringRef(), TypeQueryOptions::e_exact_match |
TypeQueryOptions::e_find_one);
m_target->GetImages().FindTypes(nullptr, query, results);
type_sp = results.GetFirstType();
}
if (type_sp) {
if (log) {
const char *name_string = type_sp->GetName().GetCString();
LLDB_LOG(log, " CAS::FEVD Matching type found for \"{0}\": {1}", name,
(name_string ? name_string : "<anonymous>"));
}
CompilerType full_type = type_sp->GetFullCompilerType();
CompilerType copied_clang_type(GuardedCopyType(full_type));
if (!copied_clang_type) {
LLDB_LOG(log, " CAS::FEVD - Couldn't export a type");
} else {
context.AddTypeDecl(copied_clang_type);
context.m_found_type = true;
}
}
if (!context.m_found_type) {
// Try the modules next.
FindDeclInModules(context, name);
}
if (!context.m_found_type && m_ast_context->getLangOpts().ObjC) {
FindDeclInObjCRuntime(context, name);
}
}
void ClangASTSource::FillNamespaceMap(
NameSearchContext &context, lldb::ModuleSP module_sp,
const CompilerDeclContext &namespace_decl) {
const ConstString name(context.m_decl_name.getAsString().c_str());
if (IgnoreName(name, true))
return;
Log *log = GetLog(LLDBLog::Expressions);
if (module_sp && namespace_decl) {
CompilerDeclContext found_namespace_decl;
if (SymbolFile *symbol_file = module_sp->GetSymbolFile()) {
found_namespace_decl = symbol_file->FindNamespace(name, namespace_decl);
if (found_namespace_decl) {
context.m_namespace_map->push_back(
std::pair<lldb::ModuleSP, CompilerDeclContext>(
module_sp, found_namespace_decl));
LLDB_LOG(log, " CAS::FEVD Found namespace {0} in module {1}", name,
module_sp->GetFileSpec().GetFilename());
}
}
return;
}
for (lldb::ModuleSP image : m_target->GetImages().Modules()) {
if (!image)
continue;
CompilerDeclContext found_namespace_decl;
SymbolFile *symbol_file = image->GetSymbolFile();
if (!symbol_file)
continue;
// If namespace_decl is not valid, 'FindNamespace' would look for
// any namespace called 'name' (ignoring parent contexts) and return
// the first one it finds. Thus if we're doing a qualified lookup only
// consider root namespaces. E.g., in an expression ::A::B::Foo, the
// lookup of ::A will result in a qualified lookup. Note, namespace
// disambiguation for function calls are handled separately in
// SearchFunctionsInSymbolContexts.
const bool find_root_namespaces =
context.m_decl_context &&
context.m_decl_context->shouldUseQualifiedLookup();
found_namespace_decl = symbol_file->FindNamespace(
name, namespace_decl, /* only root namespaces */ find_root_namespaces);
if (found_namespace_decl) {
context.m_namespace_map->push_back(
std::pair<lldb::ModuleSP, CompilerDeclContext>(image,
found_namespace_decl));
LLDB_LOG(log, " CAS::FEVD Found namespace {0} in module {1}", name,
image->GetFileSpec().GetFilename());
}
}
}
bool ClangASTSource::FindObjCMethodDeclsWithOrigin(
NameSearchContext &context, ObjCInterfaceDecl *original_interface_decl,
const char *log_info) {
const DeclarationName &decl_name(context.m_decl_name);
clang::ASTContext *original_ctx = &original_interface_decl->getASTContext();
Selector original_selector;
if (decl_name.isObjCZeroArgSelector()) {
const IdentifierInfo *ident =
&original_ctx->Idents.get(decl_name.getAsString());
original_selector = original_ctx->Selectors.getSelector(0, &ident);
} else if (decl_name.isObjCOneArgSelector()) {
const std::string &decl_name_string = decl_name.getAsString();
std::string decl_name_string_without_colon(decl_name_string.c_str(),
decl_name_string.length() - 1);
const IdentifierInfo *ident =
&original_ctx->Idents.get(decl_name_string_without_colon);
original_selector = original_ctx->Selectors.getSelector(1, &ident);
} else {
SmallVector<const IdentifierInfo *, 4> idents;
clang::Selector sel = decl_name.getObjCSelector();
unsigned num_args = sel.getNumArgs();
for (unsigned i = 0; i != num_args; ++i) {
idents.push_back(&original_ctx->Idents.get(sel.getNameForSlot(i)));
}
original_selector =
original_ctx->Selectors.getSelector(num_args, idents.data());
}
DeclarationName original_decl_name(original_selector);
llvm::SmallVector<NamedDecl *, 1> methods;
TypeSystemClang::GetCompleteDecl(original_ctx, original_interface_decl);
if (ObjCMethodDecl *instance_method_decl =
original_interface_decl->lookupInstanceMethod(original_selector)) {
methods.push_back(instance_method_decl);
} else if (ObjCMethodDecl *class_method_decl =
original_interface_decl->lookupClassMethod(
original_selector)) {
methods.push_back(class_method_decl);
}
if (methods.empty()) {
return false;
}
for (NamedDecl *named_decl : methods) {
if (!named_decl)
continue;
ObjCMethodDecl *result_method = dyn_cast<ObjCMethodDecl>(named_decl);
if (!result_method)
continue;
Decl *copied_decl = CopyDecl(result_method);
if (!copied_decl)
continue;
ObjCMethodDecl *copied_method_decl = dyn_cast<ObjCMethodDecl>(copied_decl);
if (!copied_method_decl)
continue;
Log *log = GetLog(LLDBLog::Expressions);
LLDB_LOG(log, " CAS::FOMD found ({0}) {1}", log_info,
ClangUtil::DumpDecl(copied_method_decl));
context.AddNamedDecl(copied_method_decl);
}
return true;
}
void ClangASTSource::FindDeclInModules(NameSearchContext &context,
ConstString name) {
Log *log = GetLog(LLDBLog::Expressions);
std::shared_ptr<ClangModulesDeclVendor> modules_decl_vendor =
GetClangModulesDeclVendor();
if (!modules_decl_vendor)
return;
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
if (!modules_decl_vendor->FindDecls(name, append, max_matches, decls))
return;
LLDB_LOG(log, " CAS::FEVD Matching entity found for \"{0}\" in the modules",
name);
clang::NamedDecl *const decl_from_modules = decls[0];
if (llvm::isa<clang::TypeDecl>(decl_from_modules) ||
llvm::isa<clang::ObjCContainerDecl>(decl_from_modules) ||
llvm::isa<clang::EnumConstantDecl>(decl_from_modules)) {
clang::Decl *copied_decl = CopyDecl(decl_from_modules);
clang::NamedDecl *copied_named_decl =
copied_decl ? dyn_cast<clang::NamedDecl>(copied_decl) : nullptr;
if (!copied_named_decl) {
LLDB_LOG(log, " CAS::FEVD - Couldn't export a type from the modules");
return;
}
context.AddNamedDecl(copied_named_decl);
context.m_found_type = true;
}
}
void ClangASTSource::FindDeclInObjCRuntime(NameSearchContext &context,
ConstString name) {
Log *log = GetLog(LLDBLog::Expressions);
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
return;
ObjCLanguageRuntime *language_runtime(ObjCLanguageRuntime::Get(*process));
if (!language_runtime)
return;
DeclVendor *decl_vendor = language_runtime->GetDeclVendor();
if (!decl_vendor)
return;
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
auto *clang_decl_vendor = llvm::cast<ClangDeclVendor>(decl_vendor);
if (!clang_decl_vendor->FindDecls(name, append, max_matches, decls))
return;
LLDB_LOG(log, " CAS::FEVD Matching type found for \"{0}\" in the runtime",
name);
clang::Decl *copied_decl = CopyDecl(decls[0]);
clang::NamedDecl *copied_named_decl =
copied_decl ? dyn_cast<clang::NamedDecl>(copied_decl) : nullptr;
if (!copied_named_decl) {
LLDB_LOG(log, " CAS::FEVD - Couldn't export a type from the runtime");
return;
}
context.AddNamedDecl(copied_named_decl);
}
void ClangASTSource::FindObjCMethodDecls(NameSearchContext &context) {
Log *log = GetLog(LLDBLog::Expressions);
const DeclarationName &decl_name(context.m_decl_name);
const DeclContext *decl_ctx(context.m_decl_context);
const ObjCInterfaceDecl *interface_decl =
dyn_cast<ObjCInterfaceDecl>(decl_ctx);
if (!interface_decl)
return;
do {
ClangASTImporter::DeclOrigin original = m_ast_importer_sp->GetDeclOrigin(interface_decl);
if (!original.Valid())
break;
ObjCInterfaceDecl *original_interface_decl =
dyn_cast<ObjCInterfaceDecl>(original.decl);
if (FindObjCMethodDeclsWithOrigin(context, original_interface_decl,
"at origin"))
return; // found it, no need to look any further
} while (false);
StreamString ss;
if (decl_name.isObjCZeroArgSelector()) {
ss.Printf("%s", decl_name.getAsString().c_str());
} else if (decl_name.isObjCOneArgSelector()) {
ss.Printf("%s", decl_name.getAsString().c_str());
} else {
clang::Selector sel = decl_name.getObjCSelector();
for (unsigned i = 0, e = sel.getNumArgs(); i != e; ++i) {
llvm::StringRef r = sel.getNameForSlot(i);
ss.Printf("%s:", r.str().c_str());
}
}
ss.Flush();
if (ss.GetString().contains("$__lldb"))
return; // we don't need any results
ConstString selector_name(ss.GetString());
LLDB_LOG(log,
"ClangASTSource::FindObjCMethodDecls on (ASTContext*){0:x} '{1}' "
"for selector [{2} {3}]",
m_ast_context, m_clang_ast_context->getDisplayName(),
interface_decl->getName(), selector_name);
SymbolContextList sc_list;
ModuleFunctionSearchOptions function_options;
function_options.include_symbols = false;
function_options.include_inlines = false;
std::string interface_name = interface_decl->getNameAsString();
do {
StreamString ms;
ms.Printf("-[%s %s]", interface_name.c_str(), selector_name.AsCString());
ms.Flush();
ConstString instance_method_name(ms.GetString());
sc_list.Clear();
m_target->GetImages().FindFunctions(instance_method_name,
lldb::eFunctionNameTypeFull,
function_options, sc_list);
if (sc_list.GetSize())
break;
ms.Clear();
ms.Printf("+[%s %s]", interface_name.c_str(), selector_name.AsCString());
ms.Flush();
ConstString class_method_name(ms.GetString());
sc_list.Clear();
m_target->GetImages().FindFunctions(class_method_name,
lldb::eFunctionNameTypeFull,
function_options, sc_list);
if (sc_list.GetSize())
break;
// Fall back and check for methods in categories. If we find methods this
// way, we need to check that they're actually in categories on the desired
// class.
SymbolContextList candidate_sc_list;
m_target->GetImages().FindFunctions(selector_name,
lldb::eFunctionNameTypeSelector,
function_options, candidate_sc_list);
for (const SymbolContext &candidate_sc : candidate_sc_list) {
if (!candidate_sc.function)
continue;
const char *candidate_name = candidate_sc.function->GetName().AsCString();
const char *cursor = candidate_name;
if (*cursor != '+' && *cursor != '-')
continue;
++cursor;
if (*cursor != '[')
continue;
++cursor;
size_t interface_len = interface_name.length();
if (strncmp(cursor, interface_name.c_str(), interface_len))
continue;
cursor += interface_len;
if (*cursor == ' ' || *cursor == '(')
sc_list.Append(candidate_sc);
}
} while (false);
if (sc_list.GetSize()) {
// We found a good function symbol. Use that.
for (const SymbolContext &sc : sc_list) {
if (!sc.function)
continue;
CompilerDeclContext function_decl_ctx = sc.function->GetDeclContext();
if (!function_decl_ctx)
continue;
ObjCMethodDecl *method_decl =
TypeSystemClang::DeclContextGetAsObjCMethodDecl(function_decl_ctx);
if (!method_decl)
continue;
ObjCInterfaceDecl *found_interface_decl =
method_decl->getClassInterface();
if (!found_interface_decl)
continue;
if (found_interface_decl->getName() == interface_decl->getName()) {
Decl *copied_decl = CopyDecl(method_decl);
if (!copied_decl)
continue;
ObjCMethodDecl *copied_method_decl =
dyn_cast<ObjCMethodDecl>(copied_decl);
if (!copied_method_decl)
continue;
LLDB_LOG(log, " CAS::FOMD found (in symbols)\n{0}",
ClangUtil::DumpDecl(copied_method_decl));
context.AddNamedDecl(copied_method_decl);
}
}
return;
}
// Try the debug information.
do {
ObjCInterfaceDecl *complete_interface_decl = GetCompleteObjCInterface(
const_cast<ObjCInterfaceDecl *>(interface_decl));
if (!complete_interface_decl)
break;
// We found the complete interface. The runtime never needs to be queried
// in this scenario.
DeclFromUser<const ObjCInterfaceDecl> complete_iface_decl(
complete_interface_decl);
if (complete_interface_decl == interface_decl)
break; // already checked this one
LLDB_LOG(log,
"CAS::FOPD trying origin "
"(ObjCInterfaceDecl*){0:x}/(ASTContext*){1:x}...",
complete_interface_decl, &complete_iface_decl->getASTContext());
FindObjCMethodDeclsWithOrigin(context, complete_interface_decl,
"in debug info");
return;
} while (false);
do {
// Check the modules only if the debug information didn't have a complete
// interface.
if (std::shared_ptr<ClangModulesDeclVendor> modules_decl_vendor =
GetClangModulesDeclVendor()) {
ConstString interface_name(interface_decl->getNameAsString().c_str());
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
if (!modules_decl_vendor->FindDecls(interface_name, append, max_matches,
decls))
break;
ObjCInterfaceDecl *interface_decl_from_modules =
dyn_cast<ObjCInterfaceDecl>(decls[0]);
if (!interface_decl_from_modules)
break;
if (FindObjCMethodDeclsWithOrigin(context, interface_decl_from_modules,
"in modules"))
return;
}
} while (false);
do {
// Check the runtime only if the debug information didn't have a complete
// interface and the modules don't get us anywhere.
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
break;
ObjCLanguageRuntime *language_runtime(ObjCLanguageRuntime::Get(*process));
if (!language_runtime)
break;
DeclVendor *decl_vendor = language_runtime->GetDeclVendor();
if (!decl_vendor)
break;
ConstString interface_name(interface_decl->getNameAsString().c_str());
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
auto *clang_decl_vendor = llvm::cast<ClangDeclVendor>(decl_vendor);
if (!clang_decl_vendor->FindDecls(interface_name, append, max_matches,
decls))
break;
ObjCInterfaceDecl *runtime_interface_decl =
dyn_cast<ObjCInterfaceDecl>(decls[0]);
if (!runtime_interface_decl)
break;
FindObjCMethodDeclsWithOrigin(context, runtime_interface_decl,
"in runtime");
} while (false);
}
bool ClangASTSource::FindObjCPropertyAndIvarDeclsWithOrigin(
NameSearchContext &context,
DeclFromUser<const ObjCInterfaceDecl> &origin_iface_decl) {
Log *log = GetLog(LLDBLog::Expressions);
if (origin_iface_decl.IsInvalid())
return false;
std::string name_str = context.m_decl_name.getAsString();
StringRef name(name_str);
IdentifierInfo &name_identifier(
origin_iface_decl->getASTContext().Idents.get(name));
DeclFromUser<ObjCPropertyDecl> origin_property_decl(
origin_iface_decl->FindPropertyDeclaration(
&name_identifier, ObjCPropertyQueryKind::OBJC_PR_query_instance));
bool found = false;
if (origin_property_decl.IsValid()) {
DeclFromParser<ObjCPropertyDecl> parser_property_decl(
origin_property_decl.Import(m_ast_context, *m_ast_importer_sp));
if (parser_property_decl.IsValid()) {
LLDB_LOG(log, " CAS::FOPD found\n{0}",
ClangUtil::DumpDecl(parser_property_decl.decl));
context.AddNamedDecl(parser_property_decl.decl);
found = true;
}
}
DeclFromUser<ObjCIvarDecl> origin_ivar_decl(
origin_iface_decl->getIvarDecl(&name_identifier));
if (origin_ivar_decl.IsValid()) {
DeclFromParser<ObjCIvarDecl> parser_ivar_decl(
origin_ivar_decl.Import(m_ast_context, *m_ast_importer_sp));
if (parser_ivar_decl.IsValid()) {
LLDB_LOG(log, " CAS::FOPD found\n{0}",
ClangUtil::DumpDecl(parser_ivar_decl.decl));
context.AddNamedDecl(parser_ivar_decl.decl);
found = true;
}
}
return found;
}
void ClangASTSource::FindObjCPropertyAndIvarDecls(NameSearchContext &context) {
Log *log = GetLog(LLDBLog::Expressions);
DeclFromParser<const ObjCInterfaceDecl> parser_iface_decl(
cast<ObjCInterfaceDecl>(context.m_decl_context));
DeclFromUser<const ObjCInterfaceDecl> origin_iface_decl(
parser_iface_decl.GetOrigin(*m_ast_importer_sp));
ConstString class_name(parser_iface_decl->getNameAsString().c_str());
LLDB_LOG(log,
"ClangASTSource::FindObjCPropertyAndIvarDecls on "
"(ASTContext*){0:x} '{1}' for '{2}.{3}'",
m_ast_context, m_clang_ast_context->getDisplayName(),
parser_iface_decl->getName(), context.m_decl_name.getAsString());
if (FindObjCPropertyAndIvarDeclsWithOrigin(context, origin_iface_decl))
return;
LLDB_LOG(log,
"CAS::FOPD couldn't find the property on origin "
"(ObjCInterfaceDecl*){0:x}/(ASTContext*){1:x}, searching "
"elsewhere...",
origin_iface_decl.decl, &origin_iface_decl->getASTContext());
SymbolContext null_sc;
TypeList type_list;
do {
ObjCInterfaceDecl *complete_interface_decl = GetCompleteObjCInterface(
const_cast<ObjCInterfaceDecl *>(parser_iface_decl.decl));
if (!complete_interface_decl)
break;
// We found the complete interface. The runtime never needs to be queried
// in this scenario.
DeclFromUser<const ObjCInterfaceDecl> complete_iface_decl(
complete_interface_decl);
if (complete_iface_decl.decl == origin_iface_decl.decl)
break; // already checked this one
LLDB_LOG(log,
"CAS::FOPD trying origin "
"(ObjCInterfaceDecl*){0:x}/(ASTContext*){1:x}...",
complete_iface_decl.decl, &complete_iface_decl->getASTContext());
FindObjCPropertyAndIvarDeclsWithOrigin(context, complete_iface_decl);
return;
} while (false);
do {
// Check the modules only if the debug information didn't have a complete
// interface.
std::shared_ptr<ClangModulesDeclVendor> modules_decl_vendor =
GetClangModulesDeclVendor();
if (!modules_decl_vendor)
break;
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
if (!modules_decl_vendor->FindDecls(class_name, append, max_matches, decls))
break;
DeclFromUser<const ObjCInterfaceDecl> interface_decl_from_modules(
dyn_cast<ObjCInterfaceDecl>(decls[0]));
if (!interface_decl_from_modules.IsValid())
break;
LLDB_LOG(log,
"CAS::FOPD[{0:x}] trying module "
"(ObjCInterfaceDecl*){0:x}/(ASTContext*){1:x}...",
interface_decl_from_modules.decl,
&interface_decl_from_modules->getASTContext());
if (FindObjCPropertyAndIvarDeclsWithOrigin(context,
interface_decl_from_modules))
return;
} while (false);
do {
// Check the runtime only if the debug information didn't have a complete
// interface and nothing was in the modules.
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
return;
ObjCLanguageRuntime *language_runtime(ObjCLanguageRuntime::Get(*process));
if (!language_runtime)
return;
DeclVendor *decl_vendor = language_runtime->GetDeclVendor();
if (!decl_vendor)
break;
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
auto *clang_decl_vendor = llvm::cast<ClangDeclVendor>(decl_vendor);
if (!clang_decl_vendor->FindDecls(class_name, append, max_matches, decls))
break;
DeclFromUser<const ObjCInterfaceDecl> interface_decl_from_runtime(
dyn_cast<ObjCInterfaceDecl>(decls[0]));
if (!interface_decl_from_runtime.IsValid())
break;
LLDB_LOG(log,
"CAS::FOPD[{0:x}] trying runtime "
"(ObjCInterfaceDecl*){0:x}/(ASTContext*){1:x}...",
interface_decl_from_runtime.decl,
&interface_decl_from_runtime->getASTContext());
if (FindObjCPropertyAndIvarDeclsWithOrigin(context,
interface_decl_from_runtime))
return;
} while (false);
}
void ClangASTSource::LookupInNamespace(NameSearchContext &context) {
const NamespaceDecl *namespace_context =
dyn_cast<NamespaceDecl>(context.m_decl_context);
Log *log = GetLog(LLDBLog::Expressions);
ClangASTImporter::NamespaceMapSP namespace_map =
m_ast_importer_sp->GetNamespaceMap(namespace_context);
LLDB_LOGV(log, " CAS::FEVD Inspecting namespace map {0:x} ({1} entries)",
namespace_map.get(), namespace_map->size());
if (!namespace_map)
return;
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(),
e = namespace_map->end();
i != e; ++i) {
LLDB_LOG(log, " CAS::FEVD Searching namespace {0} in module {1}",
i->second.GetName(), i->first->GetFileSpec().GetFilename());
FindExternalVisibleDecls(context, i->first, i->second);
}
}
bool ClangASTSource::layoutRecordType(
const RecordDecl *record, uint64_t &size, uint64_t &alignment,
llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>
&base_offsets,
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>
&virtual_base_offsets) {
return m_ast_importer_sp->importRecordLayoutFromOrigin(
record, size, alignment, field_offsets, base_offsets,
virtual_base_offsets);
}
void ClangASTSource::CompleteNamespaceMap(
ClangASTImporter::NamespaceMapSP &namespace_map, ConstString name,
ClangASTImporter::NamespaceMapSP &parent_map) const {
Log *log = GetLog(LLDBLog::Expressions);
if (log) {
if (parent_map && parent_map->size())
LLDB_LOG(log,
"CompleteNamespaceMap on (ASTContext*){0:x} '{1}' Searching "
"for namespace {2} in namespace {3}",
m_ast_context, m_clang_ast_context->getDisplayName(), name,
parent_map->begin()->second.GetName());
else
LLDB_LOG(log,
"CompleteNamespaceMap on (ASTContext*){0} '{1}' Searching "
"for namespace {2}",
m_ast_context, m_clang_ast_context->getDisplayName(), name);
}
if (parent_map) {
for (ClangASTImporter::NamespaceMap::iterator i = parent_map->begin(),
e = parent_map->end();
i != e; ++i) {
CompilerDeclContext found_namespace_decl;
lldb::ModuleSP module_sp = i->first;
CompilerDeclContext module_parent_namespace_decl = i->second;
SymbolFile *symbol_file = module_sp->GetSymbolFile();
if (!symbol_file)
continue;
found_namespace_decl =
symbol_file->FindNamespace(name, module_parent_namespace_decl);
if (!found_namespace_decl)
continue;
namespace_map->push_back(std::pair<lldb::ModuleSP, CompilerDeclContext>(
module_sp, found_namespace_decl));
LLDB_LOG(log, " CMN Found namespace {0} in module {1}", name,
module_sp->GetFileSpec().GetFilename());
}
} else {
CompilerDeclContext null_namespace_decl;
for (lldb::ModuleSP image : m_target->GetImages().Modules()) {
if (!image)
continue;
CompilerDeclContext found_namespace_decl;
SymbolFile *symbol_file = image->GetSymbolFile();
if (!symbol_file)
continue;
found_namespace_decl =
symbol_file->FindNamespace(name, null_namespace_decl);
if (!found_namespace_decl)
continue;
namespace_map->push_back(std::pair<lldb::ModuleSP, CompilerDeclContext>(
image, found_namespace_decl));
LLDB_LOG(log, " CMN[{0}] Found namespace {0} in module {1}", name,
image->GetFileSpec().GetFilename());
}
}
}
NamespaceDecl *ClangASTSource::AddNamespace(
NameSearchContext &context,
ClangASTImporter::NamespaceMapSP &namespace_decls) {
if (!namespace_decls)
return nullptr;
const CompilerDeclContext &namespace_decl = namespace_decls->begin()->second;
clang::ASTContext *src_ast =
TypeSystemClang::DeclContextGetTypeSystemClang(namespace_decl);
if (!src_ast)
return nullptr;
clang::NamespaceDecl *src_namespace_decl =
TypeSystemClang::DeclContextGetAsNamespaceDecl(namespace_decl);
if (!src_namespace_decl)
return nullptr;
Decl *copied_decl = CopyDecl(src_namespace_decl);
if (!copied_decl)
return nullptr;
NamespaceDecl *copied_namespace_decl = dyn_cast<NamespaceDecl>(copied_decl);
if (!copied_namespace_decl)
return nullptr;
context.m_decls.push_back(copied_namespace_decl);
m_ast_importer_sp->RegisterNamespaceMap(copied_namespace_decl,
namespace_decls);
return dyn_cast<NamespaceDecl>(copied_decl);
}
clang::Decl *ClangASTSource::CopyDecl(Decl *src_decl) {
return m_ast_importer_sp->CopyDecl(m_ast_context, src_decl);
}
ClangASTImporter::DeclOrigin ClangASTSource::GetDeclOrigin(const clang::Decl *decl) {
return m_ast_importer_sp->GetDeclOrigin(decl);
}
CompilerType ClangASTSource::GuardedCopyType(const CompilerType &src_type) {
auto src_ast = src_type.GetTypeSystem<TypeSystemClang>();
if (!src_ast)
return {};
QualType copied_qual_type = ClangUtil::GetQualType(
m_ast_importer_sp->CopyType(*m_clang_ast_context, src_type));
if (copied_qual_type.getAsOpaquePtr() &&
copied_qual_type->getCanonicalTypeInternal().isNull())
// this shouldn't happen, but we're hardening because the AST importer
// seems to be generating bad types on occasion.
return {};
return m_clang_ast_context->GetType(copied_qual_type);
}
std::shared_ptr<ClangModulesDeclVendor>
ClangASTSource::GetClangModulesDeclVendor() {
auto persistent_vars = llvm::cast<ClangPersistentVariables>(
m_target->GetPersistentExpressionStateForLanguage(lldb::eLanguageTypeC));
return persistent_vars->GetClangModulesDeclVendor();
}
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