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| //===-- SymbolFileSymtab.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 "SymbolFileSymtab.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/Symtab.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Utility/RegularExpression.h"
#include "lldb/Utility/Timer.h"
#include <memory>
using namespace lldb;
using namespace lldb_private;
void SymbolFileSymtab::Initialize() {
PluginManager::RegisterPlugin(GetPluginNameStatic(),
GetPluginDescriptionStatic(), CreateInstance);
}
void SymbolFileSymtab::Terminate() {
PluginManager::UnregisterPlugin(CreateInstance);
}
lldb_private::ConstString SymbolFileSymtab::GetPluginNameStatic() {
static ConstString g_name("symtab");
return g_name;
}
const char *SymbolFileSymtab::GetPluginDescriptionStatic() {
return "Reads debug symbols from an object file's symbol table.";
}
SymbolFile *SymbolFileSymtab::CreateInstance(ObjectFileSP objfile_sp) {
return new SymbolFileSymtab(std::move(objfile_sp));
}
void SymbolFileSymtab::GetTypes(SymbolContextScope *sc_scope,
TypeClass type_mask,
lldb_private::TypeList &type_list) {}
SymbolFileSymtab::SymbolFileSymtab(ObjectFileSP objfile_sp)
: SymbolFile(std::move(objfile_sp)), m_source_indexes(), m_func_indexes(),
m_code_indexes(), m_objc_class_name_to_index() {}
SymbolFileSymtab::~SymbolFileSymtab() {}
uint32_t SymbolFileSymtab::CalculateAbilities() {
uint32_t abilities = 0;
if (m_objfile_sp) {
const Symtab *symtab = m_objfile_sp->GetSymtab();
if (symtab) {
// The snippet of code below will get the indexes the module symbol table
// entries that are code, data, or function related (debug info), sort
// them by value (address) and dump the sorted symbols.
if (symtab->AppendSymbolIndexesWithType(eSymbolTypeSourceFile,
m_source_indexes)) {
abilities |= CompileUnits;
}
if (symtab->AppendSymbolIndexesWithType(
eSymbolTypeCode, Symtab::eDebugYes, Symtab::eVisibilityAny,
m_func_indexes)) {
symtab->SortSymbolIndexesByValue(m_func_indexes, true);
abilities |= Functions;
}
if (symtab->AppendSymbolIndexesWithType(eSymbolTypeCode, Symtab::eDebugNo,
Symtab::eVisibilityAny,
m_code_indexes)) {
symtab->SortSymbolIndexesByValue(m_code_indexes, true);
abilities |= Functions;
}
if (symtab->AppendSymbolIndexesWithType(eSymbolTypeData,
m_data_indexes)) {
symtab->SortSymbolIndexesByValue(m_data_indexes, true);
abilities |= GlobalVariables;
}
lldb_private::Symtab::IndexCollection objc_class_indexes;
if (symtab->AppendSymbolIndexesWithType(eSymbolTypeObjCClass,
objc_class_indexes)) {
symtab->AppendSymbolNamesToMap(objc_class_indexes, true, true,
m_objc_class_name_to_index);
m_objc_class_name_to_index.Sort();
}
}
}
return abilities;
}
uint32_t SymbolFileSymtab::CalculateNumCompileUnits() {
// If we don't have any source file symbols we will just have one compile
// unit for the entire object file
if (m_source_indexes.empty())
return 0;
// If we have any source file symbols we will logically organize the object
// symbols using these.
return m_source_indexes.size();
}
CompUnitSP SymbolFileSymtab::ParseCompileUnitAtIndex(uint32_t idx) {
CompUnitSP cu_sp;
// If we don't have any source file symbols we will just have one compile
// unit for the entire object file
if (idx < m_source_indexes.size()) {
const Symbol *cu_symbol =
m_objfile_sp->GetSymtab()->SymbolAtIndex(m_source_indexes[idx]);
if (cu_symbol)
cu_sp = std::make_shared<CompileUnit>(m_objfile_sp->GetModule(), nullptr,
cu_symbol->GetName().AsCString(), 0,
eLanguageTypeUnknown, eLazyBoolNo);
}
return cu_sp;
}
lldb::LanguageType SymbolFileSymtab::ParseLanguage(CompileUnit &comp_unit) {
return eLanguageTypeUnknown;
}
size_t SymbolFileSymtab::ParseFunctions(CompileUnit &comp_unit) {
std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
size_t num_added = 0;
// We must at least have a valid compile unit
const Symtab *symtab = m_objfile_sp->GetSymtab();
const Symbol *curr_symbol = nullptr;
const Symbol *next_symbol = nullptr;
// const char *prefix = m_objfile_sp->SymbolPrefix();
// if (prefix == NULL)
// prefix == "";
//
// const uint32_t prefix_len = strlen(prefix);
// If we don't have any source file symbols we will just have one compile
// unit for the entire object file
if (m_source_indexes.empty()) {
// The only time we will have a user ID of zero is when we don't have and
// source file symbols and we declare one compile unit for the entire
// object file
if (!m_func_indexes.empty()) {
}
if (!m_code_indexes.empty()) {
// StreamFile s(stdout);
// symtab->Dump(&s, m_code_indexes);
uint32_t idx = 0; // Index into the indexes
const uint32_t num_indexes = m_code_indexes.size();
for (idx = 0; idx < num_indexes; ++idx) {
uint32_t symbol_idx = m_code_indexes[idx];
curr_symbol = symtab->SymbolAtIndex(symbol_idx);
if (curr_symbol) {
// Union of all ranges in the function DIE (if the function is
// discontiguous)
AddressRange func_range(curr_symbol->GetAddress(), 0);
if (func_range.GetBaseAddress().IsSectionOffset()) {
uint32_t symbol_size = curr_symbol->GetByteSize();
if (symbol_size != 0 && !curr_symbol->GetSizeIsSibling())
func_range.SetByteSize(symbol_size);
else if (idx + 1 < num_indexes) {
next_symbol = symtab->SymbolAtIndex(m_code_indexes[idx + 1]);
if (next_symbol) {
func_range.SetByteSize(
next_symbol->GetAddressRef().GetOffset() -
curr_symbol->GetAddressRef().GetOffset());
}
}
FunctionSP func_sp(
new Function(&comp_unit,
symbol_idx, // UserID is the DIE offset
LLDB_INVALID_UID, // We don't have any type info
// for this function
curr_symbol->GetMangled(), // Linker/mangled name
nullptr, // no return type for a code symbol...
func_range)); // first address range
if (func_sp.get() != nullptr) {
comp_unit.AddFunction(func_sp);
++num_added;
}
}
}
}
}
} else {
// We assume we
}
return num_added;
}
size_t SymbolFileSymtab::ParseTypes(CompileUnit &comp_unit) { return 0; }
bool SymbolFileSymtab::ParseLineTable(CompileUnit &comp_unit) { return false; }
bool SymbolFileSymtab::ParseDebugMacros(CompileUnit &comp_unit) {
return false;
}
bool SymbolFileSymtab::ParseSupportFiles(CompileUnit &comp_unit,
FileSpecList &support_files) {
return false;
}
bool SymbolFileSymtab::ParseImportedModules(
const SymbolContext &sc, std::vector<SourceModule> &imported_modules) {
return false;
}
size_t SymbolFileSymtab::ParseBlocksRecursive(Function &func) { return 0; }
size_t SymbolFileSymtab::ParseVariablesForContext(const SymbolContext &sc) {
return 0;
}
Type *SymbolFileSymtab::ResolveTypeUID(lldb::user_id_t type_uid) {
return nullptr;
}
llvm::Optional<SymbolFile::ArrayInfo>
SymbolFileSymtab::GetDynamicArrayInfoForUID(
lldb::user_id_t type_uid, const lldb_private::ExecutionContext *exe_ctx) {
return llvm::None;
}
bool SymbolFileSymtab::CompleteType(lldb_private::CompilerType &compiler_type) {
return false;
}
uint32_t SymbolFileSymtab::ResolveSymbolContext(const Address &so_addr,
SymbolContextItem resolve_scope,
SymbolContext &sc) {
std::lock_guard<std::recursive_mutex> guard(GetModuleMutex());
if (m_objfile_sp->GetSymtab() == nullptr)
return 0;
uint32_t resolved_flags = 0;
if (resolve_scope & eSymbolContextSymbol) {
sc.symbol = m_objfile_sp->GetSymtab()->FindSymbolContainingFileAddress(
so_addr.GetFileAddress());
if (sc.symbol)
resolved_flags |= eSymbolContextSymbol;
}
return resolved_flags;
}
// PluginInterface protocol
lldb_private::ConstString SymbolFileSymtab::GetPluginName() {
return GetPluginNameStatic();
}
uint32_t SymbolFileSymtab::GetPluginVersion() { return 1; }
|