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//===-- SymbolFile.cpp ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/TypeMap.h"
#include "lldb/Symbol/TypeSystem.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/lldb-private.h"
#include <future>
using namespace lldb_private;
void SymbolFile::PreloadSymbols() {
// No-op for most implementations.
}
std::recursive_mutex &SymbolFile::GetModuleMutex() const {
return GetObjectFile()->GetModule()->GetMutex();
}
SymbolFile *SymbolFile::FindPlugin(ObjectFile *obj_file) {
std::unique_ptr<SymbolFile> best_symfile_ap;
if (obj_file != nullptr) {
// We need to test the abilities of this section list. So create what it
// would be with this new obj_file.
lldb::ModuleSP module_sp(obj_file->GetModule());
if (module_sp) {
// Default to the main module section list.
ObjectFile *module_obj_file = module_sp->GetObjectFile();
if (module_obj_file != obj_file) {
// Make sure the main object file's sections are created
module_obj_file->GetSectionList();
obj_file->CreateSections(*module_sp->GetUnifiedSectionList());
}
}
// TODO: Load any plug-ins in the appropriate plug-in search paths and
// iterate over all of them to find the best one for the job.
uint32_t best_symfile_abilities = 0;
SymbolFileCreateInstance create_callback;
for (uint32_t idx = 0;
(create_callback = PluginManager::GetSymbolFileCreateCallbackAtIndex(
idx)) != nullptr;
++idx) {
std::unique_ptr<SymbolFile> curr_symfile_ap(create_callback(obj_file));
if (curr_symfile_ap.get()) {
const uint32_t sym_file_abilities = curr_symfile_ap->GetAbilities();
if (sym_file_abilities > best_symfile_abilities) {
best_symfile_abilities = sym_file_abilities;
best_symfile_ap.reset(curr_symfile_ap.release());
// If any symbol file parser has all of the abilities, then we should
// just stop looking.
if ((kAllAbilities & sym_file_abilities) == kAllAbilities)
break;
}
}
}
if (best_symfile_ap.get()) {
// Let the winning symbol file parser initialize itself more completely
// now that it has been chosen
best_symfile_ap->InitializeObject();
}
}
return best_symfile_ap.release();
}
TypeList *SymbolFile::GetTypeList() {
if (m_obj_file)
return m_obj_file->GetModule()->GetTypeList();
return nullptr;
}
TypeSystem *SymbolFile::GetTypeSystemForLanguage(lldb::LanguageType language) {
TypeSystem *type_system =
m_obj_file->GetModule()->GetTypeSystemForLanguage(language);
if (type_system)
type_system->SetSymbolFile(this);
return type_system;
}
uint32_t SymbolFile::ResolveSymbolContext(const FileSpec &file_spec,
uint32_t line, bool check_inlines,
lldb::SymbolContextItem resolve_scope,
SymbolContextList &sc_list) {
return 0;
}
uint32_t
SymbolFile::FindGlobalVariables(const ConstString &name,
const CompilerDeclContext *parent_decl_ctx,
uint32_t max_matches, VariableList &variables) {
return 0;
}
uint32_t SymbolFile::FindGlobalVariables(const RegularExpression ®ex,
uint32_t max_matches,
VariableList &variables) {
return 0;
}
uint32_t SymbolFile::FindFunctions(const ConstString &name,
const CompilerDeclContext *parent_decl_ctx,
lldb::FunctionNameType name_type_mask,
bool include_inlines, bool append,
SymbolContextList &sc_list) {
if (!append)
sc_list.Clear();
return 0;
}
uint32_t SymbolFile::FindFunctions(const RegularExpression ®ex,
bool include_inlines, bool append,
SymbolContextList &sc_list) {
if (!append)
sc_list.Clear();
return 0;
}
void SymbolFile::GetMangledNamesForFunction(
const std::string &scope_qualified_name,
std::vector<ConstString> &mangled_names) {
return;
}
uint32_t SymbolFile::FindTypes(
const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
bool append, uint32_t max_matches,
llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
TypeMap &types) {
if (!append)
types.Clear();
return 0;
}
size_t SymbolFile::FindTypes(const std::vector<CompilerContext> &context,
bool append, TypeMap &types) {
if (!append)
types.Clear();
return 0;
}
void SymbolFile::AssertModuleLock() {
// The code below is too expensive to leave enabled in release builds. It's
// enabled in debug builds or when the correct macro is set.
#if defined(LLDB_CONFIGURATION_DEBUG)
// We assert that we have to module lock by trying to acquire the lock from a
// different thread. Note that we must abort if the result is true to
// guarantee correctness.
assert(std::async(std::launch::async,
[this] { return this->GetModuleMutex().try_lock(); })
.get() == false &&
"Module is not locked");
#endif
}
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