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239 lines
8.3 KiB
239 lines
8.3 KiB
//===-- SymbolFile.cpp ----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/TypeMap.h"
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#include "lldb/Symbol/TypeSystem.h"
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#include "lldb/Symbol/VariableList.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/StreamString.h"
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#include "lldb/lldb-private.h"
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#include <future>
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using namespace lldb_private;
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using namespace lldb;
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char SymbolFile::ID;
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void SymbolFile::PreloadSymbols() {
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// No-op for most implementations.
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}
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std::recursive_mutex &SymbolFile::GetModuleMutex() const {
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return GetObjectFile()->GetModule()->GetMutex();
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}
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ObjectFile *SymbolFile::GetMainObjectFile() {
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return m_objfile_sp->GetModule()->GetObjectFile();
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}
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SymbolFile *SymbolFile::FindPlugin(ObjectFileSP objfile_sp) {
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std::unique_ptr<SymbolFile> best_symfile_up;
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if (objfile_sp != nullptr) {
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// We need to test the abilities of this section list. So create what it
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// would be with this new objfile_sp.
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lldb::ModuleSP module_sp(objfile_sp->GetModule());
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if (module_sp) {
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// Default to the main module section list.
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ObjectFile *module_obj_file = module_sp->GetObjectFile();
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if (module_obj_file != objfile_sp.get()) {
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// Make sure the main object file's sections are created
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module_obj_file->GetSectionList();
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objfile_sp->CreateSections(*module_sp->GetUnifiedSectionList());
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}
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}
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// TODO: Load any plug-ins in the appropriate plug-in search paths and
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// iterate over all of them to find the best one for the job.
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uint32_t best_symfile_abilities = 0;
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SymbolFileCreateInstance create_callback;
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for (uint32_t idx = 0;
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(create_callback = PluginManager::GetSymbolFileCreateCallbackAtIndex(
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idx)) != nullptr;
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++idx) {
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std::unique_ptr<SymbolFile> curr_symfile_up(create_callback(objfile_sp));
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if (curr_symfile_up) {
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const uint32_t sym_file_abilities = curr_symfile_up->GetAbilities();
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if (sym_file_abilities > best_symfile_abilities) {
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best_symfile_abilities = sym_file_abilities;
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best_symfile_up.reset(curr_symfile_up.release());
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// If any symbol file parser has all of the abilities, then we should
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// just stop looking.
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if ((kAllAbilities & sym_file_abilities) == kAllAbilities)
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break;
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}
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}
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}
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if (best_symfile_up) {
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// Let the winning symbol file parser initialize itself more completely
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// now that it has been chosen
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best_symfile_up->InitializeObject();
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}
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}
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return best_symfile_up.release();
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}
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llvm::Expected<TypeSystem &>
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SymbolFile::GetTypeSystemForLanguage(lldb::LanguageType language) {
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auto type_system_or_err =
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m_objfile_sp->GetModule()->GetTypeSystemForLanguage(language);
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if (type_system_or_err) {
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type_system_or_err->SetSymbolFile(this);
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}
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return type_system_or_err;
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}
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uint32_t SymbolFile::ResolveSymbolContext(const FileSpec &file_spec,
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uint32_t line, bool check_inlines,
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lldb::SymbolContextItem resolve_scope,
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SymbolContextList &sc_list) {
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return 0;
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}
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void SymbolFile::FindGlobalVariables(ConstString name,
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const CompilerDeclContext &parent_decl_ctx,
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uint32_t max_matches,
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VariableList &variables) {}
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void SymbolFile::FindGlobalVariables(const RegularExpression ®ex,
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uint32_t max_matches,
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VariableList &variables) {}
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void SymbolFile::FindFunctions(ConstString name,
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const CompilerDeclContext &parent_decl_ctx,
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lldb::FunctionNameType name_type_mask,
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bool include_inlines,
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SymbolContextList &sc_list) {}
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void SymbolFile::FindFunctions(const RegularExpression ®ex,
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bool include_inlines,
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SymbolContextList &sc_list) {}
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void SymbolFile::GetMangledNamesForFunction(
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const std::string &scope_qualified_name,
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std::vector<ConstString> &mangled_names) {
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return;
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}
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void SymbolFile::FindTypes(
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ConstString name, const CompilerDeclContext &parent_decl_ctx,
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uint32_t max_matches,
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llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
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TypeMap &types) {}
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void SymbolFile::FindTypes(llvm::ArrayRef<CompilerContext> pattern,
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LanguageSet languages,
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llvm::DenseSet<SymbolFile *> &searched_symbol_files,
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TypeMap &types) {}
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void SymbolFile::AssertModuleLock() {
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// The code below is too expensive to leave enabled in release builds. It's
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// enabled in debug builds or when the correct macro is set.
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#if defined(LLDB_CONFIGURATION_DEBUG)
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// We assert that we have to module lock by trying to acquire the lock from a
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// different thread. Note that we must abort if the result is true to
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// guarantee correctness.
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assert(std::async(std::launch::async,
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[this] { return this->GetModuleMutex().try_lock(); })
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.get() == false &&
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"Module is not locked");
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#endif
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}
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uint32_t SymbolFile::GetNumCompileUnits() {
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std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
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if (!m_compile_units) {
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// Create an array of compile unit shared pointers -- which will each
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// remain NULL until someone asks for the actual compile unit information.
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m_compile_units.emplace(CalculateNumCompileUnits());
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}
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return m_compile_units->size();
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}
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CompUnitSP SymbolFile::GetCompileUnitAtIndex(uint32_t idx) {
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std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
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uint32_t num = GetNumCompileUnits();
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if (idx >= num)
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return nullptr;
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lldb::CompUnitSP &cu_sp = (*m_compile_units)[idx];
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if (!cu_sp)
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cu_sp = ParseCompileUnitAtIndex(idx);
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return cu_sp;
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}
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void SymbolFile::SetCompileUnitAtIndex(uint32_t idx, const CompUnitSP &cu_sp) {
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std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
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const size_t num_compile_units = GetNumCompileUnits();
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assert(idx < num_compile_units);
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(void)num_compile_units;
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// Fire off an assertion if this compile unit already exists for now. The
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// partial parsing should take care of only setting the compile unit
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// once, so if this assertion fails, we need to make sure that we don't
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// have a race condition, or have a second parse of the same compile
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// unit.
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assert((*m_compile_units)[idx] == nullptr);
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(*m_compile_units)[idx] = cu_sp;
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}
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Symtab *SymbolFile::GetSymtab() {
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std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
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if (m_symtab)
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return m_symtab;
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// Fetch the symtab from the main object file.
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m_symtab = GetMainObjectFile()->GetSymtab();
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// Then add our symbols to it.
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if (m_symtab)
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AddSymbols(*m_symtab);
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return m_symtab;
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}
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void SymbolFile::SectionFileAddressesChanged() {
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ObjectFile *module_objfile = GetMainObjectFile();
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ObjectFile *symfile_objfile = GetObjectFile();
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if (symfile_objfile != module_objfile)
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symfile_objfile->SectionFileAddressesChanged();
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if (m_symtab)
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m_symtab->SectionFileAddressesChanged();
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}
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void SymbolFile::Dump(Stream &s) {
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s.Format("SymbolFile {0} ({1})\n", GetPluginName(),
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GetMainObjectFile()->GetFileSpec());
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s.PutCString("Types:\n");
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m_type_list.Dump(&s, /*show_context*/ false);
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s.PutChar('\n');
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s.PutCString("Compile units:\n");
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if (m_compile_units) {
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for (const CompUnitSP &cu_sp : *m_compile_units) {
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// We currently only dump the compile units that have been parsed
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if (cu_sp)
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cu_sp->Dump(&s, /*show_context*/ false);
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}
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}
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s.PutChar('\n');
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if (Symtab *symtab = GetSymtab())
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symtab->Dump(&s, nullptr, eSortOrderNone);
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}
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SymbolFile::RegisterInfoResolver::~RegisterInfoResolver() = default;
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