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ClangASTSource.cpp
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ClangASTSource.cpp
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//===-- ClangASTSource.cpp ---------------------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ClangASTSource.h"
#include "ASTDumper.h"
#include "ClangModulesDeclVendor.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/ClangUtil.h"
#include "lldb/Symbol/CompilerDeclContext.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/TaggedASTType.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Log.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecordLayout.h"
#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)
: m_import_in_progress(false), m_lookups_enabled(false), m_target(target),
m_ast_context(NULL), m_active_lexical_decls(), m_active_lookups() {
if (!target->GetUseModernTypeLookup()) {
m_ast_importer_sp = m_target->GetClangASTImporter();
}
}
void ClangASTSource::InstallASTContext(clang::ASTContext &ast_context,
clang::FileManager &file_manager,
bool is_shared_context) {
m_ast_context = &ast_context;
m_file_manager = &file_manager;
if (m_target->GetUseModernTypeLookup()) {
// Configure the ExternalASTMerger. The merger needs to be able to import
// types from any source that we would do lookups in, which includes the
// persistent AST context as well as the modules and Objective-C runtime
// AST contexts.
lldbassert(!m_merger_up);
clang::ExternalASTMerger::ImporterTarget target = {ast_context,
file_manager};
std::vector<clang::ExternalASTMerger::ImporterSource> sources;
for (lldb::ModuleSP module_sp : m_target->GetImages().Modules()) {
if (auto *module_ast_ctx = llvm::cast_or_null<ClangASTContext>(
module_sp->GetTypeSystemForLanguage(lldb::eLanguageTypeC))) {
lldbassert(module_ast_ctx->getASTContext());
lldbassert(module_ast_ctx->getFileManager());
sources.push_back({*module_ast_ctx->getASTContext(),
*module_ast_ctx->getFileManager(),
module_ast_ctx->GetOriginMap()
});
}
}
do {
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
break;
ObjCLanguageRuntime *language_runtime(process->GetObjCLanguageRuntime());
if (!language_runtime)
break;
DeclVendor *runtime_decl_vendor = language_runtime->GetDeclVendor();
if (!runtime_decl_vendor)
break;
sources.push_back(runtime_decl_vendor->GetImporterSource());
} while (0);
do {
DeclVendor *modules_decl_vendor =
m_target->GetClangModulesDeclVendor();
if (!modules_decl_vendor)
break;
sources.push_back(modules_decl_vendor->GetImporterSource());
} while (0);
if (!is_shared_context) {
// Update the scratch AST context's merger to reflect any new sources we
// might have come across since the last time an expression was parsed.
auto scratch_ast_context = static_cast<ClangASTContextForExpressions*>(
m_target->GetScratchClangASTContext());
scratch_ast_context->GetMergerUnchecked().AddSources(sources);
sources.push_back({*scratch_ast_context->getASTContext(),
*scratch_ast_context->getFileManager(),
scratch_ast_context->GetOriginMap()});
} while (0);
m_merger_up =
llvm::make_unique<clang::ExternalASTMerger>(target, sources);
} else {
m_ast_importer_sp->InstallMapCompleter(&ast_context, *this);
}
}
ClangASTSource::~ClangASTSource() {
if (m_ast_importer_sp)
m_ast_importer_sp->ForgetDestination(m_ast_context);
// We are in the process of destruction, don't create clang ast context on
// demand
// by passing false to Target::GetScratchClangASTContext(create_on_demand).
ClangASTContext *scratch_clang_ast_context =
m_target->GetScratchClangASTContext(false);
if (!scratch_clang_ast_context)
return;
clang::ASTContext *scratch_ast_context =
scratch_clang_ast_context->getASTContext();
if (!scratch_ast_context)
return;
if (m_ast_context != scratch_ast_context && m_ast_importer_sp)
m_ast_importer_sp->ForgetSource(scratch_ast_context, m_ast_context);
}
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) {
if (!m_ast_context) {
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
if (GetImportInProgress()) {
SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
return false;
}
std::string decl_name(clang_decl_name.getAsString());
// if (m_decl_map.DoingASTImport ())
// return DeclContext::lookup_result();
//
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(*this, 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);
// static uint32_t g_depth = 0;
// ++g_depth;
// printf("[%5u] FindExternalVisibleDeclsByName() \"%s\"\n", g_depth,
// uniqued_const_decl_name);
llvm::SmallVector<NamedDecl *, 4> name_decls;
NameSearchContext name_search_context(*this, name_decls, clang_decl_name,
decl_ctx);
FindExternalVisibleDecls(name_search_context);
SetExternalVisibleDeclsForName(decl_ctx, clang_decl_name, name_decls);
// --g_depth;
m_active_lookups.erase(uniqued_const_decl_name);
return (name_decls.size() != 0);
}
void ClangASTSource::CompleteType(TagDecl *tag_decl) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
if (log) {
log->Printf(" CompleteTagDecl[%u] on (ASTContext*)%p Completing "
"(TagDecl*)%p named %s",
current_id, static_cast<void *>(m_ast_context),
static_cast<void *>(tag_decl),
tag_decl->getName().str().c_str());
log->Printf(" CTD[%u] Before:", current_id);
ASTDumper dumper((Decl *)tag_decl);
dumper.ToLog(log, " [CTD] ");
}
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) {
if (HasMerger()) {
GetMergerUnchecked().CompleteType(tag_decl);
}
return;
}
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 (log)
log->Printf(" CTD[%u] Type could not be completed in the module in "
"which it was first found.",
current_id);
bool found = false;
DeclContext *decl_ctx = tag_decl->getDeclContext();
if (const NamespaceDecl *namespace_context =
dyn_cast<NamespaceDecl>(decl_ctx)) {
ClangASTImporter::NamespaceMapSP namespace_map =
m_ast_importer_sp->GetNamespaceMap(namespace_context);
if (log && log->GetVerbose())
log->Printf(" CTD[%u] Inspecting namespace map %p (%d entries)",
current_id, static_cast<void *>(namespace_map.get()),
static_cast<int>(namespace_map->size()));
if (!namespace_map)
return;
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(),
e = namespace_map->end();
i != e && !found; ++i) {
if (log)
log->Printf(" CTD[%u] Searching namespace %s in module %s",
current_id, i->second.GetName().AsCString(),
i->first->GetFileSpec().GetFilename().GetCString());
TypeList types;
SymbolContext null_sc;
ConstString name(tag_decl->getName().str().c_str());
i->first->FindTypesInNamespace(null_sc, name, &i->second, UINT32_MAX,
types);
for (uint32_t ti = 0, te = types.GetSize(); ti != te && !found; ++ti) {
lldb::TypeSP type = types.GetTypeAtIndex(ti);
if (!type)
continue;
CompilerType clang_type(type->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 =
const_cast<TagDecl *>(tag_type->getDecl());
if (m_ast_importer_sp->CompleteTagDeclWithOrigin(tag_decl,
candidate_tag_decl))
found = true;
}
}
} else {
TypeList types;
SymbolContext null_sc;
ConstString name(tag_decl->getName().str().c_str());
CompilerDeclContext namespace_decl;
const ModuleList &module_list = m_target->GetImages();
bool exact_match = false;
llvm::DenseSet<SymbolFile *> searched_symbol_files;
module_list.FindTypes(null_sc, name, exact_match, UINT32_MAX,
searched_symbol_files, types);
for (uint32_t ti = 0, te = types.GetSize(); ti != te && !found; ++ti) {
lldb::TypeSP type = types.GetTypeAtIndex(ti);
if (!type)
continue;
CompilerType clang_type(type->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 =
const_cast<TagDecl *>(tag_type->getDecl());
// We have found a type by basename and we need to make sure the decl
// contexts
// are the same before we can try to complete this type with another
if (!ClangASTContext::DeclsAreEquivalent(tag_decl, candidate_tag_decl))
continue;
if (m_ast_importer_sp->CompleteTagDeclWithOrigin(tag_decl,
candidate_tag_decl))
found = true;
}
}
}
if (log) {
log->Printf(" [CTD] After:");
ASTDumper dumper((Decl *)tag_decl);
dumper.ToLog(log, " [CTD] ");
}
}
void ClangASTSource::CompleteType(clang::ObjCInterfaceDecl *interface_decl) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
if (log) {
log->Printf(" [CompleteObjCInterfaceDecl] on (ASTContext*)%p Completing "
"an ObjCInterfaceDecl named %s",
static_cast<void *>(m_ast_context),
interface_decl->getName().str().c_str());
log->Printf(" [COID] Before:");
ASTDumper dumper((Decl *)interface_decl);
dumper.ToLog(log, " [COID] ");
}
if (!m_ast_importer_sp) {
if (HasMerger()) {
ObjCInterfaceDecl *complete_iface_decl =
GetCompleteObjCInterface(interface_decl);
if (complete_iface_decl && (complete_iface_decl != interface_decl)) {
m_merger_up->ForceRecordOrigin(interface_decl, {complete_iface_decl, &complete_iface_decl->getASTContext()});
}
GetMergerUnchecked().CompleteType(interface_decl);
} else {
lldbassert(0 && "No mechanism for completing a type!");
}
return;
}
Decl *original_decl = NULL;
ASTContext *original_ctx = NULL;
if (m_ast_importer_sp->ResolveDeclOrigin(interface_decl, &original_decl,
&original_ctx)) {
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());
if (log) {
log->Printf(" [COID] After:");
ASTDumper dumper((Decl *)interface_decl);
dumper.ToLog(log, " [COID] ");
}
}
clang::ObjCInterfaceDecl *ClangASTSource::GetCompleteObjCInterface(
const clang::ObjCInterfaceDecl *interface_decl) {
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
return NULL;
ObjCLanguageRuntime *language_runtime(process->GetObjCLanguageRuntime());
if (!language_runtime)
return NULL;
ConstString class_name(interface_decl->getNameAsString().c_str());
lldb::TypeSP complete_type_sp(
language_runtime->LookupInCompleteClassCache(class_name));
if (!complete_type_sp)
return NULL;
TypeFromUser complete_type =
TypeFromUser(complete_type_sp->GetFullCompilerType());
lldb::opaque_compiler_type_t complete_opaque_type =
complete_type.GetOpaqueQualType();
if (!complete_opaque_type)
return NULL;
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 NULL;
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) {
if (HasMerger()) {
if (auto *interface_decl = dyn_cast<ObjCInterfaceDecl>(decl_context)) {
ObjCInterfaceDecl *complete_iface_decl =
GetCompleteObjCInterface(interface_decl);
if (complete_iface_decl && (complete_iface_decl != interface_decl)) {
m_merger_up->ForceRecordOrigin(interface_decl, {complete_iface_decl, &complete_iface_decl->getASTContext()});
}
}
return GetMergerUnchecked().FindExternalLexicalDecls(decl_context,
predicate,
decls);
} else if (!m_ast_importer_sp)
return;
ClangASTMetrics::RegisterLexicalQuery();
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_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);
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
if (log) {
if (const NamedDecl *context_named_decl = dyn_cast<NamedDecl>(context_decl))
log->Printf(
"FindExternalLexicalDecls[%u] on (ASTContext*)%p in '%s' (%sDecl*)%p",
current_id, static_cast<void *>(m_ast_context),
context_named_decl->getNameAsString().c_str(),
context_decl->getDeclKindName(),
static_cast<const void *>(context_decl));
else if (context_decl)
log->Printf(
"FindExternalLexicalDecls[%u] on (ASTContext*)%p in (%sDecl*)%p",
current_id, static_cast<void *>(m_ast_context),
context_decl->getDeclKindName(),
static_cast<const void *>(context_decl));
else
log->Printf(
"FindExternalLexicalDecls[%u] on (ASTContext*)%p in a NULL context",
current_id, static_cast<const void *>(m_ast_context));
}
Decl *original_decl = NULL;
ASTContext *original_ctx = NULL;
if (!m_ast_importer_sp->ResolveDeclOrigin(context_decl, &original_decl,
&original_ctx))
return;
if (log) {
log->Printf(" FELD[%u] Original decl (ASTContext*)%p (Decl*)%p:",
current_id, static_cast<void *>(original_ctx),
static_cast<void *>(original_decl));
ASTDumper(original_decl).ToLog(log, " ");
}
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;
for (TagDecl::decl_iterator iter = original_decl_context->decls_begin();
iter != original_decl_context->decls_end(); ++iter) {
Decl *decl = *iter;
if (predicate(decl->getKind())) {
if (log) {
ASTDumper ast_dumper(decl);
if (const NamedDecl *context_named_decl =
dyn_cast<NamedDecl>(context_decl))
log->Printf(" FELD[%d] Adding [to %sDecl %s] lexical %sDecl %s",
current_id, context_named_decl->getDeclKindName(),
context_named_decl->getNameAsString().c_str(),
decl->getDeclKindName(), ast_dumper.GetCString());
else
log->Printf(" FELD[%d] Adding lexical %sDecl %s", current_id,
decl->getDeclKindName(), ast_dumper.GetCString());
}
Decl *copied_decl = CopyDecl(decl);
if (!copied_decl)
continue;
if (FieldDecl *copied_field = dyn_cast<FieldDecl>(copied_decl)) {
QualType copied_field_type = copied_field->getType();
m_ast_importer_sp->RequireCompleteType(copied_field_type);
}
DeclContext *decl_context_non_const =
const_cast<DeclContext *>(decl_context);
if (copied_decl->getDeclContext() != decl_context) {
if (copied_decl->getDeclContext()->containsDecl(copied_decl))
copied_decl->getDeclContext()->removeDecl(copied_decl);
copied_decl->setDeclContext(decl_context_non_const);
}
if (!decl_context_non_const->containsDecl(copied_decl))
decl_context_non_const->addDeclInternal(copied_decl);
}
}
return;
}
void ClangASTSource::FindExternalVisibleDecls(NameSearchContext &context) {
assert(m_ast_context);
ClangASTMetrics::RegisterVisibleQuery();
const ConstString name(context.m_decl_name.getAsString().c_str());
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
if (log) {
if (!context.m_decl_context)
log->Printf("ClangASTSource::FindExternalVisibleDecls[%u] on "
"(ASTContext*)%p for '%s' in a NULL DeclContext",
current_id, static_cast<void *>(m_ast_context),
name.GetCString());
else if (const NamedDecl *context_named_decl =
dyn_cast<NamedDecl>(context.m_decl_context))
log->Printf("ClangASTSource::FindExternalVisibleDecls[%u] on "
"(ASTContext*)%p for '%s' in '%s'",
current_id, static_cast<void *>(m_ast_context),
name.GetCString(),
context_named_decl->getNameAsString().c_str());
else
log->Printf("ClangASTSource::FindExternalVisibleDecls[%u] on "
"(ASTContext*)%p for '%s' in a '%s'",
current_id, static_cast<void *>(m_ast_context),
name.GetCString(), context.m_decl_context->getDeclKindName());
}
if (HasMerger() && !isa<TranslationUnitDecl>(context.m_decl_context)
/* possibly handle NamespaceDecls here? */) {
if (auto *interface_decl =
dyn_cast<ObjCInterfaceDecl>(context.m_decl_context)) {
ObjCInterfaceDecl *complete_iface_decl =
GetCompleteObjCInterface(interface_decl);
if (complete_iface_decl && (complete_iface_decl != interface_decl)) {
GetMergerUnchecked().ForceRecordOrigin(
interface_decl,
{complete_iface_decl, &complete_iface_decl->getASTContext()});
}
}
GetMergerUnchecked().FindExternalVisibleDeclsByName(context.m_decl_context,
context.m_decl_name);
return; // otherwise we may need to fall back
}
context.m_namespace_map.reset(new ClangASTImporter::NamespaceMap);
if (const NamespaceDecl *namespace_context =
dyn_cast<NamespaceDecl>(context.m_decl_context)) {
ClangASTImporter::NamespaceMapSP namespace_map = m_ast_importer_sp ?
m_ast_importer_sp->GetNamespaceMap(namespace_context) : nullptr;
if (log && log->GetVerbose())
log->Printf(" CAS::FEVD[%u] Inspecting namespace map %p (%d entries)",
current_id, static_cast<void *>(namespace_map.get()),
static_cast<int>(namespace_map->size()));
if (!namespace_map)
return;
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(),
e = namespace_map->end();
i != e; ++i) {
if (log)
log->Printf(" CAS::FEVD[%u] Searching namespace %s in module %s",
current_id, i->second.GetName().AsCString(),
i->first->GetFileSpec().GetFilename().GetCString());
FindExternalVisibleDecls(context, i->first, i->second, current_id);
}
} else if (isa<ObjCInterfaceDecl>(context.m_decl_context) && !HasMerger()) {
FindObjCPropertyAndIvarDecls(context);
} else if (!isa<TranslationUnitDecl>(context.m_decl_context)) {
// we shouldn't be getting FindExternalVisibleDecls calls for these
return;
} else {
CompilerDeclContext namespace_decl;
if (log)
log->Printf(" CAS::FEVD[%u] Searching the root namespace", current_id);
FindExternalVisibleDecls(context, lldb::ModuleSP(), namespace_decl,
current_id);
}
if (!context.m_namespace_map->empty()) {
if (log && log->GetVerbose())
log->Printf(" CAS::FEVD[%u] Registering namespace map %p (%d entries)",
current_id,
static_cast<void *>(context.m_namespace_map.get()),
static_cast<int>(context.m_namespace_map->size()));
NamespaceDecl *clang_namespace_decl =
AddNamespace(context, context.m_namespace_map);
if (clang_namespace_decl)
clang_namespace_decl->setHasExternalVisibleStorage();
}
}
bool ClangASTSource::IgnoreName(const ConstString name,
bool ignore_all_dollar_names) {
static const ConstString id_name("id");
static const ConstString Class_name("Class");
if (name == id_name || name == Class_name)
return true;
StringRef name_string_ref = name.GetStringRef();
// The ClangASTSource is not responsible for finding $-names.
if (name_string_ref.empty() ||
(ignore_all_dollar_names && name_string_ref.startswith("$")) ||
name_string_ref.startswith("_$"))
return true;
return false;
}
void ClangASTSource::FindExternalVisibleDecls(
NameSearchContext &context, lldb::ModuleSP module_sp,
CompilerDeclContext &namespace_decl, unsigned int current_id) {
assert(m_ast_context);
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
SymbolContextList sc_list;
const ConstString name(context.m_decl_name.getAsString().c_str());
if (IgnoreName(name, true))
return;
if (module_sp && namespace_decl) {
CompilerDeclContext found_namespace_decl;
SymbolVendor *symbol_vendor = module_sp->GetSymbolVendor();
if (symbol_vendor) {
SymbolContext null_sc;
found_namespace_decl =
symbol_vendor->FindNamespace(null_sc, name, &namespace_decl);
if (found_namespace_decl) {
context.m_namespace_map->push_back(
std::pair<lldb::ModuleSP, CompilerDeclContext>(
module_sp, found_namespace_decl));
if (log)
log->Printf(" CAS::FEVD[%u] Found namespace %s in module %s",
current_id, name.GetCString(),
module_sp->GetFileSpec().GetFilename().GetCString());
}
}
} else if (!HasMerger()) {
const ModuleList &target_images = m_target->GetImages();
std::lock_guard<std::recursive_mutex> guard(target_images.GetMutex());
for (size_t i = 0, e = target_images.GetSize(); i < e; ++i) {
lldb::ModuleSP image = target_images.GetModuleAtIndexUnlocked(i);
if (!image)
continue;
CompilerDeclContext found_namespace_decl;
SymbolVendor *symbol_vendor = image->GetSymbolVendor();
if (!symbol_vendor)
continue;
SymbolContext null_sc;
found_namespace_decl =
symbol_vendor->FindNamespace(null_sc, name, &namespace_decl);
if (found_namespace_decl) {
context.m_namespace_map->push_back(
std::pair<lldb::ModuleSP, CompilerDeclContext>(
image, found_namespace_decl));
if (log)
log->Printf(" CAS::FEVD[%u] Found namespace %s in module %s",
current_id, name.GetCString(),
image->GetFileSpec().GetFilename().GetCString());
}
}
}
do {
if (context.m_found.type)
break;
TypeList types;
SymbolContext null_sc;
const bool exact_match = false;
llvm::DenseSet<lldb_private::SymbolFile *> searched_symbol_files;
if (module_sp && namespace_decl)
module_sp->FindTypesInNamespace(null_sc, name, &namespace_decl, 1, types);
else
m_target->GetImages().FindTypes(null_sc, name, exact_match, 1,
searched_symbol_files, types);
if (size_t num_types = types.GetSize()) {
for (size_t ti = 0; ti < num_types; ++ti) {
lldb::TypeSP type_sp = types.GetTypeAtIndex(ti);
if (log) {
const char *name_string = type_sp->GetName().GetCString();
log->Printf(" CAS::FEVD[%u] Matching type found for \"%s\": %s",
current_id, name.GetCString(),
(name_string ? name_string : "<anonymous>"));
}
CompilerType full_type = type_sp->GetFullCompilerType();
CompilerType copied_clang_type(GuardedCopyType(full_type));
if (!copied_clang_type) {
if (log)
log->Printf(" CAS::FEVD[%u] - Couldn't export a type", current_id);
continue;
}
context.AddTypeDecl(copied_clang_type);
context.m_found.type = true;
break;
}
}
if (!context.m_found.type) {
// Try the modules next.
do {
if (ClangModulesDeclVendor *modules_decl_vendor =
m_target->GetClangModulesDeclVendor()) {
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
if (!modules_decl_vendor->FindDecls(name, append, max_matches, decls))
break;
if (log) {
log->Printf(" CAS::FEVD[%u] Matching entity found for \"%s\" in "
"the modules",
current_id, name.GetCString());
}
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) {
if (log)
log->Printf(
" CAS::FEVD[%u] - Couldn't export a type from the modules",
current_id);
break;
}
context.AddNamedDecl(copied_named_decl);
context.m_found.type = true;
}
}
} while (0);
}
if (!context.m_found.type) {
do {
// Couldn't find any types elsewhere. Try the Objective-C runtime if
// one exists.
lldb::ProcessSP process(m_target->GetProcessSP());
if (!process)
break;
ObjCLanguageRuntime *language_runtime(
process->GetObjCLanguageRuntime());
if (!language_runtime)
break;
DeclVendor *decl_vendor = language_runtime->GetDeclVendor();
if (!decl_vendor)
break;
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
if (!decl_vendor->FindDecls(name, append, max_matches, decls))
break;
if (log) {
log->Printf(
" CAS::FEVD[%u] Matching type found for \"%s\" in the runtime",
current_id, name.GetCString());
}
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) {
if (log)
log->Printf(
" CAS::FEVD[%u] - Couldn't export a type from the runtime",
current_id);
break;
}
context.AddNamedDecl(copied_named_decl);
} while (0);
}
} while (0);
}