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llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
Raphael Isemann 6e3b0cc2fb [lldb][NFC] Rename ClangASTContext to TypeSystemClang 
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
2020-01-23 10:09:14 +01:00

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//===-- ClangASTSource.cpp ---------------------------------------*- C++-*-===//
//
// 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/TypeSystemClang.h"
#include "lldb/Symbol/ClangUtil.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/Log.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecordLayout.h"
#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.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 lldb::ClangASTImporterSP &importer)
: m_import_in_progress(false), m_lookups_enabled(false), m_target(target),
m_ast_context(nullptr), m_active_lexical_decls(), m_active_lookups() {
m_ast_importer_sp = importer;
}
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() {
if (!m_ast_importer_sp)
return;
m_ast_importer_sp->ForgetDestination(m_ast_context);
if (!m_target)
return;
// We are in the process of destruction, don't create clang ast context on
// demand by passing false to
// Target::GetScratchTypeSystemClang(create_on_demand).
TypeSystemClang *scratch_clang_ast_context =
TypeSystemClang::GetScratch(*m_target, false);
if (!scratch_clang_ast_context)
return;
clang::ASTContext &scratch_ast_context =
scratch_clang_ast_context->getASTContext();
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) {
LLDB_LOG(log,
" CompleteTagDecl[{0}] on (ASTContext*){1} Completing "
"(TagDecl*){2} named {3}",
current_id, m_clang_ast_context->getDisplayName(), tag_decl,
tag_decl->getName());
LLDB_LOG(log, " CTD[%u] Before:\n{0}", current_id,
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) {
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.
LLDB_LOG(log,
" CTD[{0}] 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())
LLDB_LOG(log,
" CTD[{0}] Inspecting namespace map{1} ({2} entries)",
current_id, namespace_map.get(), namespace_map->size());
if (!namespace_map)
return;
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(),
e = namespace_map->end();
i != e && !found; ++i) {
LLDB_LOG(log, " CTD[{0}] Searching namespace {1} in module {2}",
current_id, i->second.GetName(),
i->first->GetFileSpec().GetFilename());
TypeList types;
ConstString name(tag_decl->getName().str().c_str());
i->first->FindTypesInNamespace(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;
ConstString name(tag_decl->getName().str().c_str());
const ModuleList &module_list = m_target->GetImages();
bool exact_match = false;
llvm::DenseSet<SymbolFile *> searched_symbol_files;
module_list.FindTypes(nullptr, 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 (!TypeSystemClang::DeclsAreEquivalent(tag_decl, candidate_tag_decl))
continue;
if (m_ast_importer_sp->CompleteTagDeclWithOrigin(tag_decl,
candidate_tag_decl))
found = true;
}
}
}
LLDB_LOG(log, " [CTD] After:\n{0}", ClangUtil::DumpDecl(tag_decl));
}
void ClangASTSource::CompleteType(clang::ObjCInterfaceDecl *interface_decl) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
LLDB_LOG(log,
" [CompleteObjCInterfaceDecl] on (ASTContext*){0} '{1}' "
"Completing an ObjCInterfaceDecl named {1}",
m_ast_context, m_clang_ast_context->getDisplayName(),
interface_decl->getName());
LLDB_LOG(log, " [COID] Before:\n{0}",
ClangUtil::DumpDecl(interface_decl));
if (!m_ast_importer_sp) {
lldbassert(0 && "No mechanism for completing a type!");
return;
}
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());
if (log) {
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) {
if (!m_ast_importer_sp)
return;
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))
LLDB_LOG(log,
"FindExternalLexicalDecls[{0}] on (ASTContext*){1} '{2}' in "
"'{3}' (%sDecl*){4}",
current_id, 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[{0}] on (ASTContext*){1} '{2}' in "
"({3}Decl*){4}",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
context_decl->getDeclKindName(),
static_cast<const void *>(context_decl));
else
LLDB_LOG(log,
"FindExternalLexicalDecls[{0}] on (ASTContext*){1} '{2}' in a "
"NULL context",
current_id, 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[{0}] Original decl {1} (Decl*){2:x}:\n{3}", current_id,
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 (TagDecl::decl_iterator iter = original_decl_context->decls_begin();
iter != original_decl_context->decls_end(); ++iter) {
Decl *decl = *iter;
// 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[{0}] Adding [to {1}Decl {2}] lexical {3}Decl {4}",
current_id, context_named_decl->getDeclKindName(),
context_named_decl->getName(), decl->getDeclKindName(), ast_dump);
else
LLDB_LOG(log, " FELD[{0}] Adding lexical {1}Decl {2}", current_id,
decl->getDeclKindName(), ast_dump);
}
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);
}
} 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();
}
return;
}
void ClangASTSource::FindExternalVisibleDecls(NameSearchContext &context) {
assert(m_ast_context);
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)
LLDB_LOG(log,
"ClangASTSource::FindExternalVisibleDecls[{0}] on "
"(ASTContext*){1} '{2}' for '{3}' in a NULL DeclContext",
current_id, 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[{0}] on "
"(ASTContext*){1} '{2}' for '{3}' in '{4}'",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
name, context_named_decl->getName());
else
LLDB_LOG(log,
"ClangASTSource::FindExternalVisibleDecls[{0}] on "
"(ASTContext*){1} '{2}' for '{3}' in a '{4}'",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
name, context.m_decl_context->getDeclKindName());
}
context.m_namespace_map = std::make_shared<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())
LLDB_LOG(log,
" CAS::FEVD[{0}] Inspecting namespace map {1} ({2} entries)",
current_id, 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[{0}] Searching namespace {1} in module {2}",
current_id, i->second.GetName(),
i->first->GetFileSpec().GetFilename());
FindExternalVisibleDecls(context, i->first, i->second, current_id);
}
} 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[{0}] Searching the root namespace", current_id);
FindExternalVisibleDecls(context, lldb::ModuleSP(), namespace_decl,
current_id);
}
if (!context.m_namespace_map->empty()) {
if (log && log->GetVerbose())
LLDB_LOG(log,
" CAS::FEVD[{0}] Registering namespace map {1} ({2} entries)",
current_id, 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 $-names.
return name_string_ref.empty() ||
(ignore_all_dollar_names && name_string_ref.startswith("$")) ||
name_string_ref.startswith("_$");
}
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 (!m_target)
return;
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[{0}] Found namespace {1} in module {2}",
current_id, name, module_sp->GetFileSpec().GetFilename());
}
}
} else {
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;
SymbolFile *symbol_file = image->GetSymbolFile();
if (!symbol_file)
continue;
found_namespace_decl = symbol_file->FindNamespace(name, &namespace_decl);
if (found_namespace_decl) {
context.m_namespace_map->push_back(
std::pair<lldb::ModuleSP, CompilerDeclContext>(
image, found_namespace_decl));
LLDB_LOG(log, " CAS::FEVD[{0}] Found namespace {1} in module {2}",
current_id, name, image->GetFileSpec().GetFilename());
}
}
}
do {
if (context.m_found.type)
break;
TypeList types;
const bool exact_match = true;
llvm::DenseSet<lldb_private::SymbolFile *> searched_symbol_files;
if (module_sp && namespace_decl)
module_sp->FindTypesInNamespace(name, &namespace_decl, 1, types);
else {
m_target->GetImages().FindTypes(module_sp.get(), 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();
LLDB_LOG(log, " CAS::FEVD[{0}] Matching type found for \"{1}\": {2}",
current_id, 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[{0}] - 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) {
LLDB_LOG(log,
" CAS::FEVD[{0}] Matching entity found for \"{1}\" in "
"the modules",
current_id, 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[{0}] - Couldn't export a type from the modules",
current_id);
break;
}
context.AddNamedDecl(copied_named_decl);
context.m_found.type = true;
}
}
} while (false);
}
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(
ObjCLanguageRuntime::Get(*process));
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;
auto *clang_decl_vendor = llvm::cast<ClangDeclVendor>(decl_vendor);
if (!clang_decl_vendor->FindDecls(name, append, max_matches, decls))
break;
if (log) {
LLDB_LOG(
log,
" CAS::FEVD[{0}] Matching type found for \"{0}\" in the runtime",
current_id, 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[{0}] - Couldn't export a type from the runtime",
current_id);
break;
}
context.AddNamedDecl(copied_named_decl);
} while (false);
}
} while (false);
}
template <class D> class TaggedASTDecl {
public:
TaggedASTDecl() : decl(nullptr) {}
TaggedASTDecl(D *_decl) : decl(_decl) {}
bool IsValid() const { return (decl != nullptr); }
bool IsInvalid() const { return !IsValid(); }
D *operator->() const { return decl; }
D *decl;
};
template <class D2, template <class D> class TD, class D1>
TD<D2> DynCast(TD<D1> source) {
return TD<D2>(dyn_cast<D2>(source.decl));
}
template <class D = Decl> class DeclFromParser;
template <class D = Decl> class DeclFromUser;
template <class D> class DeclFromParser : public TaggedASTDecl<D> {
public:
DeclFromParser() : TaggedASTDecl<D>() {}
DeclFromParser(D *_decl) : TaggedASTDecl<D>(_decl) {}
DeclFromUser<D> GetOrigin(ClangASTSource &source);
};
template <class D> class DeclFromUser : public TaggedASTDecl<D> {
public:
DeclFromUser() : TaggedASTDecl<D>() {}
DeclFromUser(D *_decl) : TaggedASTDecl<D>(_decl) {}
DeclFromParser<D> Import(ClangASTSource &source);
};
template <class D>
DeclFromUser<D> DeclFromParser<D>::GetOrigin(ClangASTSource &source) {
ClangASTImporter::DeclOrigin origin = source.GetDeclOrigin(this->decl);
if (!origin.Valid())
return DeclFromUser<D>();
return DeclFromUser<D>(dyn_cast<D>(origin.decl));
}
template <class D>
DeclFromParser<D> DeclFromUser<D>::Import(ClangASTSource &source) {
DeclFromParser<> parser_generic_decl(source.CopyDecl(this->decl));
if (parser_generic_decl.IsInvalid())
return DeclFromParser<D>();
return DeclFromParser<D>(dyn_cast<D>(parser_generic_decl.decl));
}
bool ClangASTSource::FindObjCMethodDeclsWithOrigin(
unsigned int current_id, 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()) {
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);
IdentifierInfo *ident =
&original_ctx->Idents.get(decl_name_string_without_colon);
original_selector = original_ctx->Selectors.getSelector(1, &ident);
} else {
SmallVector<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(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
LLDB_LOG(log, " CAS::FOMD[{0}] found ({1}) {2}", current_id, log_info,
ClangUtil::DumpDecl(copied_method_decl));
context.AddNamedDecl(copied_method_decl);
}
return true;
}
void ClangASTSource::FindObjCMethodDecls(NameSearchContext &context) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
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(current_id, 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[{0}] on (ASTContext*){1} '{2}' "
"for selector [{3} {4}]",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
interface_decl->getName(), selector_name);
SymbolContextList sc_list;
const bool include_symbols = false;
const bool 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, include_symbols,
include_inlines, 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, include_symbols,
include_inlines, 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, include_symbols,
include_inlines, candidate_sc_list);
for (uint32_t ci = 0, ce = candidate_sc_list.GetSize(); ci != ce; ++ci) {
SymbolContext candidate_sc;
if (!candidate_sc_list.GetContextAtIndex(ci, candidate_sc))
continue;
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 (uint32_t i = 0, e = sc_list.GetSize(); i != e; ++i) {
SymbolContext sc;
if (!sc_list.GetContextAtIndex(i, sc))
continue;
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[{0}] found (in symbols)\n{1}", current_id,
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[{0}] trying origin "
"(ObjCInterfaceDecl*){1}/(ASTContext*){2}...",
current_id, complete_interface_decl,
&complete_iface_decl->getASTContext());
FindObjCMethodDeclsWithOrigin(current_id, 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 (ClangModulesDeclVendor *modules_decl_vendor =
m_target->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(
current_id, 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(current_id, context, runtime_interface_decl,
"in runtime");
} while (false);
}
static bool FindObjCPropertyAndIvarDeclsWithOrigin(
unsigned int current_id, NameSearchContext &context, ClangASTSource &source,
DeclFromUser<const ObjCInterfaceDecl> &origin_iface_decl) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_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(source));
if (parser_property_decl.IsValid()) {
LLDB_LOG(log, " CAS::FOPD[{0}] found\n{1}", current_id,
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(source));
if (parser_ivar_decl.IsValid()) {
if (log) {
LLDB_LOG(log, " CAS::FOPD[{0}] found\n{1}", current_id,
ClangUtil::DumpDecl(parser_ivar_decl.decl));
}
context.AddNamedDecl(parser_ivar_decl.decl);
found = true;
}
}
return found;
}
void ClangASTSource::FindObjCPropertyAndIvarDecls(NameSearchContext &context) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
DeclFromParser<const ObjCInterfaceDecl> parser_iface_decl(
cast<ObjCInterfaceDecl>(context.m_decl_context));
DeclFromUser<const ObjCInterfaceDecl> origin_iface_decl(
parser_iface_decl.GetOrigin(*this));
ConstString class_name(parser_iface_decl->getNameAsString().c_str());
LLDB_LOG(log,
"ClangASTSource::FindObjCPropertyAndIvarDecls[{0}] on "
"(ASTContext*){1} '{2}' for '{3}.{4}'",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
parser_iface_decl->getName(), context.m_decl_name.getAsString());
if (FindObjCPropertyAndIvarDeclsWithOrigin(
current_id, context, *this, origin_iface_decl))
return;
LLDB_LOG(log,
"CAS::FOPD[{0}] couldn't find the property on origin "
"(ObjCInterfaceDecl*){1}/(ASTContext*){2}, searching "
"elsewhere...",
current_id, 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[{0}] trying origin "
"(ObjCInterfaceDecl*){1}/(ASTContext*){2}...",
current_id, complete_iface_decl.decl,
&complete_iface_decl->getASTContext());
FindObjCPropertyAndIvarDeclsWithOrigin(current_id, context, *this,
complete_iface_decl);
return;
} while (false);
do {
// Check the modules only if the debug information didn't have a complete
// interface.
ClangModulesDeclVendor *modules_decl_vendor =
m_target->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}] trying module "
"(ObjCInterfaceDecl*){1}/(ASTContext*){2}...",
current_id, interface_decl_from_modules.decl,
&interface_decl_from_modules->getASTContext());
if (FindObjCPropertyAndIvarDeclsWithOrigin(current_id, context, *this,
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}] trying runtime "
"(ObjCInterfaceDecl*){1}/(ASTContext*){2}...",
current_id, interface_decl_from_runtime.decl,
&interface_decl_from_runtime->getASTContext());
if (FindObjCPropertyAndIvarDeclsWithOrigin(
current_id, context, *this, interface_decl_from_runtime))
return;
} while (false);
}
typedef llvm::DenseMap<const FieldDecl *, uint64_t> FieldOffsetMap;
typedef llvm::DenseMap<const CXXRecordDecl *, CharUnits> BaseOffsetMap;
template <class D, class O>
static bool ImportOffsetMap(llvm::DenseMap<const D *, O> &destination_map,
llvm::DenseMap<const D *, O> &source_map,
ClangASTSource &source) {
// When importing fields into a new record, clang has a hard requirement that
// fields be imported in field offset order. Since they are stored in a
// DenseMap with a pointer as the key type, this means we cannot simply
// iterate over the map, as the order will be non-deterministic. Instead we
// have to sort by the offset and then insert in sorted order.
typedef llvm::DenseMap<const D *, O> MapType;
typedef typename MapType::value_type PairType;
std::vector<PairType> sorted_items;
sorted_items.reserve(source_map.size());
sorted_items.assign(source_map.begin(), source_map.end());
llvm::sort(sorted_items.begin(), sorted_items.end(),
[](const PairType &lhs, const PairType &rhs) {
return lhs.second < rhs.second;
});
for (const auto &item : sorted_items) {
DeclFromUser<D> user_decl(const_cast<D *>(item.first));
DeclFromParser<D> parser_decl(user_decl.Import(source));
if (parser_decl.IsInvalid())
return false;
destination_map.insert(
std::pair<const D *, O>(parser_decl.decl, item.second));
}
return true;
}
template <bool IsVirtual>
bool ExtractBaseOffsets(const ASTRecordLayout &record_layout,
DeclFromUser<const CXXRecordDecl> &record,
BaseOffsetMap &base_offsets) {
for (CXXRecordDecl::base_class_const_iterator
bi = (IsVirtual ? record->vbases_begin() : record->bases_begin()),
be = (IsVirtual ? record->vbases_end() : record->bases_end());
bi != be; ++bi) {
if (!IsVirtual && bi->isVirtual())
continue;
const clang::Type *origin_base_type = bi->getType().getTypePtr();
const clang::RecordType *origin_base_record_type =
origin_base_type->getAs<RecordType>();
if (!origin_base_record_type)
return false;
DeclFromUser<RecordDecl> origin_base_record(
origin_base_record_type->getDecl());
if (origin_base_record.IsInvalid())
return false;
DeclFromUser<CXXRecordDecl> origin_base_cxx_record(
DynCast<CXXRecordDecl>(origin_base_record));
if (origin_base_cxx_record.IsInvalid())
return false;
CharUnits base_offset;
if (IsVirtual)
base_offset =
record_layout.getVBaseClassOffset(origin_base_cxx_record.decl);
else
base_offset =
record_layout.getBaseClassOffset(origin_base_cxx_record.decl);
base_offsets.insert(std::pair<const CXXRecordDecl *, CharUnits>(
origin_base_cxx_record.decl, base_offset));
}
return true;
}
bool ClangASTSource::layoutRecordType(const RecordDecl *record, uint64_t &size,
uint64_t &alignment,
FieldOffsetMap &field_offsets,
BaseOffsetMap &base_offsets,
BaseOffsetMap &virtual_base_offsets) {
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
LLDB_LOG(log,
"LayoutRecordType[{0}] on (ASTContext*){1} '{2}' for (RecordDecl*)"
"{3} [name = '{4}']",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
record, record->getName());
DeclFromParser<const RecordDecl> parser_record(record);
DeclFromUser<const RecordDecl> origin_record(
parser_record.GetOrigin(*this));
if (origin_record.IsInvalid())
return false;
FieldOffsetMap origin_field_offsets;
BaseOffsetMap origin_base_offsets;
BaseOffsetMap origin_virtual_base_offsets;
TypeSystemClang::GetCompleteDecl(
&origin_record->getASTContext(),
const_cast<RecordDecl *>(origin_record.decl));
clang::RecordDecl *definition = origin_record.decl->getDefinition();
if (!definition || !definition->isCompleteDefinition())
return false;
const ASTRecordLayout &record_layout(
origin_record->getASTContext().getASTRecordLayout(origin_record.decl));
int field_idx = 0, field_count = record_layout.getFieldCount();
for (RecordDecl::field_iterator fi = origin_record->field_begin(),
fe = origin_record->field_end();
fi != fe; ++fi) {
if (field_idx >= field_count)
return false; // Layout didn't go well. Bail out.
uint64_t field_offset = record_layout.getFieldOffset(field_idx);
origin_field_offsets.insert(
std::pair<const FieldDecl *, uint64_t>(*fi, field_offset));
field_idx++;
}
lldbassert(&record->getASTContext() == m_ast_context);
DeclFromUser<const CXXRecordDecl> origin_cxx_record(
DynCast<const CXXRecordDecl>(origin_record));
if (origin_cxx_record.IsValid()) {
if (!ExtractBaseOffsets<false>(record_layout, origin_cxx_record,
origin_base_offsets) ||
!ExtractBaseOffsets<true>(record_layout, origin_cxx_record,
origin_virtual_base_offsets))
return false;
}
if (!ImportOffsetMap(field_offsets, origin_field_offsets, *this) ||
!ImportOffsetMap(base_offsets, origin_base_offsets, *this) ||
!ImportOffsetMap(virtual_base_offsets, origin_virtual_base_offsets,
*this))
return false;
size = record_layout.getSize().getQuantity() * m_ast_context->getCharWidth();
alignment = record_layout.getAlignment().getQuantity() *
m_ast_context->getCharWidth();
if (log) {
LLDB_LOG(log, "LRT[{0}] returned:", current_id);
LLDB_LOG(log, "LRT[{0}] Original = (RecordDecl*)%p", current_id,
static_cast<const void *>(origin_record.decl));
LLDB_LOG(log, "LRT[{0}] Size = %" PRId64, current_id, size);
LLDB_LOG(log, "LRT[{0}] Alignment = %" PRId64, current_id, alignment);
LLDB_LOG(log, "LRT[{0}] Fields:", current_id);
for (RecordDecl::field_iterator fi = record->field_begin(),
fe = record->field_end();
fi != fe; ++fi) {
LLDB_LOG(log,
"LRT[{0}] (FieldDecl*){1}, Name = '{2}', Offset = {3} bits",
current_id, *fi, fi->getName(), field_offsets[*fi]);
}
DeclFromParser<const CXXRecordDecl> parser_cxx_record =
DynCast<const CXXRecordDecl>(parser_record);
if (parser_cxx_record.IsValid()) {
LLDB_LOG(log, "LRT[{0}] Bases:", current_id);
for (CXXRecordDecl::base_class_const_iterator
bi = parser_cxx_record->bases_begin(),
be = parser_cxx_record->bases_end();
bi != be; ++bi) {
bool is_virtual = bi->isVirtual();
QualType base_type = bi->getType();
const RecordType *base_record_type = base_type->getAs<RecordType>();
DeclFromParser<RecordDecl> base_record(base_record_type->getDecl());
DeclFromParser<CXXRecordDecl> base_cxx_record =
DynCast<CXXRecordDecl>(base_record);
LLDB_LOG(log,
"LRT[{0}] {1}(CXXRecordDecl*){2}, Name = '{3}', Offset = "
"{4} chars",
current_id, (is_virtual ? "Virtual " : ""),
base_cxx_record.decl, base_cxx_record.decl->getName(),
(is_virtual
? virtual_base_offsets[base_cxx_record.decl].getQuantity()
: base_offsets[base_cxx_record.decl].getQuantity()));
}
} else {
LLDB_LOG(log, "LRD[{0}] Not a CXXRecord, so no bases", current_id);
}
}
return true;
}
void ClangASTSource::CompleteNamespaceMap(
ClangASTImporter::NamespaceMapSP &namespace_map, ConstString name,
ClangASTImporter::NamespaceMapSP &parent_map) const {
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
if (log) {
if (parent_map && parent_map->size())
LLDB_LOG(log,
"CompleteNamespaceMap[{0}] on (ASTContext*){1} '{2}' Searching "
"for namespace {3} in namespace {4}",
current_id, m_ast_context, m_clang_ast_context->getDisplayName(),
name, parent_map->begin()->second.GetName());
else
LLDB_LOG(log,
"CompleteNamespaceMap[{0}] on (ASTContext*){1} '{2}' Searching "
"for namespace {3}",
current_id, 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[{0}] Found namespace {1} in module {2}", current_id,
name, module_sp->GetFileSpec().GetFilename());
}
} else {
const ModuleList &target_images = m_target->GetImages();
std::lock_guard<std::recursive_mutex> guard(target_images.GetMutex());
CompilerDeclContext null_namespace_decl;
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;
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 {1} in module {2}", current_id,
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) {
if (m_ast_importer_sp) {
return m_ast_importer_sp->CopyDecl(m_ast_context, src_decl);
} else {
lldbassert(0 && "No mechanism for copying a decl!");
return nullptr;
}
}
ClangASTImporter::DeclOrigin ClangASTSource::GetDeclOrigin(const clang::Decl *decl) {
if (m_ast_importer_sp) {
return m_ast_importer_sp->GetDeclOrigin(decl);
} else {
// this can happen early enough that no ExternalASTSource is installed.
return ClangASTImporter::DeclOrigin();
}
}
CompilerType ClangASTSource::GuardedCopyType(const CompilerType &src_type) {
TypeSystemClang *src_ast =
llvm::dyn_cast_or_null<TypeSystemClang>(src_type.GetTypeSystem());
if (src_ast == nullptr)
return CompilerType();
SetImportInProgress(true);
QualType copied_qual_type;
if (m_ast_importer_sp) {
copied_qual_type = ClangUtil::GetQualType(
m_ast_importer_sp->CopyType(*m_clang_ast_context, src_type));
} else {
lldbassert(0 && "No mechanism for copying a type!");
return CompilerType();
}
SetImportInProgress(false);
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 CompilerType();
return m_clang_ast_context->GetType(copied_qual_type);
}
clang::NamedDecl *NameSearchContext::AddVarDecl(const CompilerType &type) {
assert(type && "Type for variable must be valid!");
if (!type.IsValid())
return nullptr;
TypeSystemClang *lldb_ast =
llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!lldb_ast)
return nullptr;
IdentifierInfo *ii = m_decl_name.getAsIdentifierInfo();
clang::ASTContext &ast = lldb_ast->getASTContext();
clang::NamedDecl *Decl = VarDecl::Create(
ast, const_cast<DeclContext *>(m_decl_context), SourceLocation(),
SourceLocation(), ii, ClangUtil::GetQualType(type), nullptr, SC_Static);
m_decls.push_back(Decl);
return Decl;
}
clang::NamedDecl *NameSearchContext::AddFunDecl(const CompilerType &type,
bool extern_c) {
assert(type && "Type for variable must be valid!");
if (!type.IsValid())
return nullptr;
if (m_function_types.count(type))
return nullptr;
TypeSystemClang *lldb_ast =
llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!lldb_ast)
return nullptr;
m_function_types.insert(type);
QualType qual_type(ClangUtil::GetQualType(type));
clang::ASTContext &ast = lldb_ast->getASTContext();
const bool isInlineSpecified = false;
const bool hasWrittenPrototype = true;
const bool isConstexprSpecified = false;
clang::DeclContext *context = const_cast<DeclContext *>(m_decl_context);
if (extern_c) {
context = LinkageSpecDecl::Create(
ast, context, SourceLocation(), SourceLocation(),
clang::LinkageSpecDecl::LanguageIDs::lang_c, false);
}
// Pass the identifier info for functions the decl_name is needed for
// operators
clang::DeclarationName decl_name =
m_decl_name.getNameKind() == DeclarationName::Identifier
? m_decl_name.getAsIdentifierInfo()
: m_decl_name;
clang::FunctionDecl *func_decl = FunctionDecl::Create(
ast, context, SourceLocation(), SourceLocation(), decl_name, qual_type,
nullptr, SC_Extern, isInlineSpecified, hasWrittenPrototype,
isConstexprSpecified ? CSK_constexpr : CSK_unspecified);
// We have to do more than just synthesize the FunctionDecl. We have to
// synthesize ParmVarDecls for all of the FunctionDecl's arguments. To do
// this, we raid the function's FunctionProtoType for types.
const FunctionProtoType *func_proto_type =
qual_type.getTypePtr()->getAs<FunctionProtoType>();
if (func_proto_type) {
unsigned NumArgs = func_proto_type->getNumParams();
unsigned ArgIndex;
SmallVector<ParmVarDecl *, 5> parm_var_decls;
for (ArgIndex = 0; ArgIndex < NumArgs; ++ArgIndex) {
QualType arg_qual_type(func_proto_type->getParamType(ArgIndex));
parm_var_decls.push_back(
ParmVarDecl::Create(ast, const_cast<DeclContext *>(context),
SourceLocation(), SourceLocation(), nullptr,
arg_qual_type, nullptr, SC_Static, nullptr));
}
func_decl->setParams(ArrayRef<ParmVarDecl *>(parm_var_decls));
} else {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
LLDB_LOG(log, "Function type wasn't a FunctionProtoType");
}
// If this is an operator (e.g. operator new or operator==), only insert the
// declaration we inferred from the symbol if we can provide the correct
// number of arguments. We shouldn't really inject random decl(s) for
// functions that are analyzed semantically in a special way, otherwise we
// will crash in clang.
clang::OverloadedOperatorKind op_kind = clang::NUM_OVERLOADED_OPERATORS;
if (func_proto_type &&
TypeSystemClang::IsOperator(decl_name.getAsString().c_str(), op_kind)) {
if (!TypeSystemClang::CheckOverloadedOperatorKindParameterCount(
false, op_kind, func_proto_type->getNumParams()))
return nullptr;
}
m_decls.push_back(func_decl);
return func_decl;
}
clang::NamedDecl *NameSearchContext::AddGenericFunDecl() {
FunctionProtoType::ExtProtoInfo proto_info;
proto_info.Variadic = true;
QualType generic_function_type(m_ast_source.m_ast_context->getFunctionType(
m_ast_source.m_ast_context->UnknownAnyTy, // result
ArrayRef<QualType>(), // argument types
proto_info));
return AddFunDecl(
m_ast_source.m_clang_ast_context->GetType(generic_function_type), true);
}
clang::NamedDecl *
NameSearchContext::AddTypeDecl(const CompilerType &clang_type) {
if (ClangUtil::IsClangType(clang_type)) {
QualType qual_type = ClangUtil::GetQualType(clang_type);
if (const TypedefType *typedef_type =
llvm::dyn_cast<TypedefType>(qual_type)) {
TypedefNameDecl *typedef_name_decl = typedef_type->getDecl();
m_decls.push_back(typedef_name_decl);
return (NamedDecl *)typedef_name_decl;
} else if (const TagType *tag_type = qual_type->getAs<TagType>()) {
TagDecl *tag_decl = tag_type->getDecl();
m_decls.push_back(tag_decl);
return tag_decl;
} else if (const ObjCObjectType *objc_object_type =
qual_type->getAs<ObjCObjectType>()) {
ObjCInterfaceDecl *interface_decl = objc_object_type->getInterface();
m_decls.push_back((NamedDecl *)interface_decl);
return (NamedDecl *)interface_decl;
}
}
return nullptr;
}
void NameSearchContext::AddLookupResult(clang::DeclContextLookupResult result) {
for (clang::NamedDecl *decl : result)
m_decls.push_back(decl);
}
void NameSearchContext::AddNamedDecl(clang::NamedDecl *decl) {
m_decls.push_back(decl);
}
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