bcf2cfbdc5
They will now be represented as: eSymbolTypeFunction: eSymbolTypeCode with IsDebug() == true eSymbolTypeGlobal: eSymbolTypeData with IsDebug() == true and IsExternal() == true eSymbolTypeStatic: eSymbolTypeData with IsDebug() == true and IsExternal() == false This simplifies the logic when dealing with symbols and allows for symbols to be coalesced into a single symbol most of the time. Enabled the minimal symbol table for mach-o again after working out all the kinks. We now get nice concise symbol tables and debugging with DWARF in the .o files with a debug map in the binary works well again. There were issues where the SymbolFileDWARFDebugMap symbol file parser was using symbol IDs and symbol indexes interchangeably. Now that all those issues are resolved debugging is working nicely. llvm-svn: 113678
404 lines
12 KiB
C++
404 lines
12 KiB
C++
//===-- SymbolFileSymtab.cpp ------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "SymbolFileSymtab.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/Core/RegularExpression.h"
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#include "lldb/Core/Timer.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/Symtab.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/Function.h"
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using namespace lldb;
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using namespace lldb_private;
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void
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SymbolFileSymtab::Initialize()
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{
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PluginManager::RegisterPlugin (GetPluginNameStatic(),
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GetPluginDescriptionStatic(),
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CreateInstance);
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}
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void
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SymbolFileSymtab::Terminate()
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{
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PluginManager::UnregisterPlugin (CreateInstance);
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}
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const char *
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SymbolFileSymtab::GetPluginNameStatic()
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{
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return "symbol-file.symtab";
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}
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const char *
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SymbolFileSymtab::GetPluginDescriptionStatic()
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{
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return "Reads debug symbols from an object file's symbol table.";
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}
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SymbolFile*
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SymbolFileSymtab::CreateInstance (ObjectFile* obj_file)
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{
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return new SymbolFileSymtab(obj_file);
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}
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SymbolFileSymtab::SymbolFileSymtab(ObjectFile* obj_file) :
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SymbolFile(obj_file),
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m_source_indexes(),
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m_func_indexes(),
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m_code_indexes(),
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m_data_indexes(),
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m_addr_indexes()
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{
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}
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SymbolFileSymtab::~SymbolFileSymtab()
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{
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}
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uint32_t
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SymbolFileSymtab::GetAbilities ()
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{
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uint32_t abilities = 0;
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const Symtab *symtab = m_obj_file->GetSymtab();
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if (symtab)
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{
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//----------------------------------------------------------------------
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// The snippet of code below will get the indexes the module symbol
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// table entries that are code, data, or function related (debug info),
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// sort them by value (address) and dump the sorted symbols.
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//----------------------------------------------------------------------
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symtab->AppendSymbolIndexesWithType(eSymbolTypeSourceFile, m_source_indexes);
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if (!m_source_indexes.empty())
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{
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abilities |= CompileUnits;
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}
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symtab->AppendSymbolIndexesWithType(eSymbolTypeCode, Symtab::eDebugYes, Symtab::eVisibilityAny, m_func_indexes);
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if (!m_func_indexes.empty())
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{
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symtab->SortSymbolIndexesByValue(m_func_indexes, true);
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abilities |= Functions;
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}
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symtab->AppendSymbolIndexesWithType(eSymbolTypeCode, Symtab::eDebugNo, Symtab::eVisibilityAny, m_code_indexes);
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if (!m_code_indexes.empty())
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{
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symtab->SortSymbolIndexesByValue(m_code_indexes, true);
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abilities |= Labels;
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}
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symtab->AppendSymbolIndexesWithType(eSymbolTypeData, m_data_indexes);
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if (!m_data_indexes.empty())
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{
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symtab->SortSymbolIndexesByValue(m_data_indexes, true);
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abilities |= GlobalVariables;
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}
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}
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return abilities;
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}
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uint32_t
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SymbolFileSymtab::GetNumCompileUnits()
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{
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// If we don't have any source file symbols we will just have one compile unit for
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// the entire object file
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if (m_source_indexes.empty())
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return 1;
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// If we have any source file symbols we will logically orgnize the object symbols
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// using these.
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return m_source_indexes.size();
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}
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CompUnitSP
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SymbolFileSymtab::ParseCompileUnitAtIndex(uint32_t idx)
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{
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CompUnitSP cu_sp;
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// If we don't have any source file symbols we will just have one compile unit for
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// the entire object file
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if (m_source_indexes.empty())
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{
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const FileSpec &obj_file_spec = m_obj_file->GetFileSpec();
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if (obj_file_spec)
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cu_sp.reset(new CompileUnit(m_obj_file->GetModule(), NULL, obj_file_spec, 0, eLanguageTypeUnknown));
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}
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else if (idx < m_source_indexes.size())
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{
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const Symbol *cu_symbol = m_obj_file->GetSymtab()->SymbolAtIndex(m_source_indexes[idx]);
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if (cu_symbol)
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cu_sp.reset(new CompileUnit(m_obj_file->GetModule(), NULL, cu_symbol->GetMangled().GetName().AsCString(), 0, eLanguageTypeUnknown));
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}
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return cu_sp;
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}
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size_t
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SymbolFileSymtab::ParseCompileUnitFunctions (const SymbolContext &sc)
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{
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size_t num_added = 0;
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// We must at least have a valid compile unit
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assert (sc.comp_unit != NULL);
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const Symtab *symtab = m_obj_file->GetSymtab();
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const Symbol *curr_symbol = NULL;
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const Symbol *next_symbol = NULL;
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// const char *prefix = m_obj_file->SymbolPrefix();
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// if (prefix == NULL)
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// prefix == "";
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//
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// const uint32_t prefix_len = strlen(prefix);
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// If we don't have any source file symbols we will just have one compile unit for
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// the entire object file
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if (m_source_indexes.empty())
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{
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// The only time we will have a user ID of zero is when we don't have
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// and source file symbols and we declare one compile unit for the
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// entire object file
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if (!m_func_indexes.empty())
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{
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}
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if (!m_code_indexes.empty())
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{
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// StreamFile s(stdout);
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// symtab->Dump(&s, m_code_indexes);
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uint32_t idx = 0; // Index into the indexes
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const uint32_t num_indexes = m_code_indexes.size();
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for (idx = 0; idx < num_indexes; ++idx)
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{
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uint32_t symbol_idx = m_code_indexes[idx];
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curr_symbol = symtab->SymbolAtIndex(symbol_idx);
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if (curr_symbol)
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{
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// Union of all ranges in the function DIE (if the function is discontiguous)
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AddressRange func_range(curr_symbol->GetValue(), 0);
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if (func_range.GetBaseAddress().IsSectionOffset())
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{
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uint32_t symbol_size = curr_symbol->GetByteSize();
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if (symbol_size != 0 && !curr_symbol->GetSizeIsSibling())
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func_range.SetByteSize(symbol_size);
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else if (idx + 1 < num_indexes)
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{
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next_symbol = symtab->SymbolAtIndex(m_code_indexes[idx + 1]);
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if (next_symbol)
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{
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func_range.SetByteSize(next_symbol->GetValue().GetOffset() - curr_symbol->GetValue().GetOffset());
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}
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}
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FunctionSP func_sp(new Function(sc.comp_unit,
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symbol_idx, // UserID is the DIE offset
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LLDB_INVALID_UID, // We don't have any type info for this function
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curr_symbol->GetMangled(), // Linker/mangled name
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NULL, // no return type for a code symbol...
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func_range)); // first address range
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if (func_sp.get() != NULL)
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{
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sc.comp_unit->AddFunction(func_sp);
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++num_added;
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}
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}
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}
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}
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}
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}
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else
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{
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// We assume we
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}
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return num_added;
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}
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bool
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SymbolFileSymtab::ParseCompileUnitLineTable (const SymbolContext &sc)
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{
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return false;
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}
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bool
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SymbolFileSymtab::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList &support_files)
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{
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return false;
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}
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size_t
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SymbolFileSymtab::ParseFunctionBlocks (const SymbolContext &sc)
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{
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return 0;
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}
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size_t
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SymbolFileSymtab::ParseTypes (const SymbolContext &sc)
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{
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return 0;
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}
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size_t
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SymbolFileSymtab::ParseVariablesForContext (const SymbolContext& sc)
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{
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return 0;
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}
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Type*
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SymbolFileSymtab::ResolveTypeUID(lldb::user_id_t type_uid)
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{
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return NULL;
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}
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uint32_t
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SymbolFileSymtab::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
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{
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if (m_obj_file->GetSymtab() == NULL)
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return 0;
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uint32_t resolved_flags = 0;
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if (resolve_scope & eSymbolContextSymbol)
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{
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sc.symbol = m_obj_file->GetSymtab()->FindSymbolContainingFileAddress(so_addr.GetFileAddress());
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if (sc.symbol)
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resolved_flags |= eSymbolContextSymbol;
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}
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return resolved_flags;
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}
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uint32_t
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SymbolFileSymtab::ResolveSymbolContext (const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
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{
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return 0;
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}
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uint32_t
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SymbolFileSymtab::FindGlobalVariables(const ConstString &name, bool append, uint32_t max_matches, VariableList& variables)
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{
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return 0;
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}
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uint32_t
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SymbolFileSymtab::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
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{
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return 0;
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}
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uint32_t
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SymbolFileSymtab::FindFunctions(const ConstString &name, uint32_t name_type_mask, bool append, SymbolContextList& sc_list)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"SymbolFileSymtab::FindFunctions (name = '%s')",
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name.GetCString());
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Symtab *symtab = m_obj_file->GetSymtab();
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if (symtab)
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{
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const uint32_t start_size = sc_list.GetSize();
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std::vector<uint32_t> symbol_indexes;
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symtab->FindAllSymbolsWithNameAndType (name, eSymbolTypeCode, Symtab::eDebugAny, Symtab::eVisibilityAny, symbol_indexes);
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const uint32_t num_matches = symbol_indexes.size();
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if (num_matches)
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{
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SymbolContext sc(m_obj_file->GetModule());
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for (uint32_t i=0; i<num_matches; i++)
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{
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sc.symbol = symtab->SymbolAtIndex(symbol_indexes[i]);
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sc_list.Append(sc);
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}
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}
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return sc_list.GetSize() - start_size;
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}
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return 0;
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}
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uint32_t
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SymbolFileSymtab::FindFunctions(const RegularExpression& regex, bool append, SymbolContextList& sc_list)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"SymbolFileSymtab::FindFunctions (regex = '%s')",
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regex.GetText());
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return 0;
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}
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uint32_t
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SymbolFileSymtab::FindTypes (const lldb_private::SymbolContext& sc, const lldb_private::ConstString &name, bool append, uint32_t max_matches, lldb_private::TypeList& types)
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{
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if (!append)
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types.Clear();
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return 0;
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}
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//
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//uint32_t
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//SymbolFileSymtab::FindTypes(const SymbolContext& sc, const RegularExpression& regex, bool append, uint32_t max_matches, TypeList& types)
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//{
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// return 0;
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//}
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//------------------------------------------------------------------
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// PluginInterface protocol
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//------------------------------------------------------------------
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const char *
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SymbolFileSymtab::GetPluginName()
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{
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return "SymbolFileSymtab";
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}
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const char *
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SymbolFileSymtab::GetShortPluginName()
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{
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return GetPluginNameStatic();
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}
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uint32_t
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SymbolFileSymtab::GetPluginVersion()
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{
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return 1;
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}
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void
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SymbolFileSymtab::GetPluginCommandHelp (const char *command, Stream *strm)
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{
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}
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Error
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SymbolFileSymtab::ExecutePluginCommand (Args &command, Stream *strm)
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{
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Error error;
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error.SetErrorString("No plug-in command are currently supported.");
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return error;
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}
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Log *
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SymbolFileSymtab::EnablePluginLogging (Stream *strm, Args &command)
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{
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return NULL;
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}
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