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https://github.com/Gericom/teak-llvm.git
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f9eec20bd3
DWARF accelerator table sections to the DWARF parser. These sections are similar to the .debug_pubnames and .debug_pubtypes, but they are designed to be hash tables that are saved to disc in a way that the sections can just be loaded into memory and used without any work on the debugger side. The .debug_pubnames and .debug_pubtypes sections are not ordered, contain a copy of the name in the section itself which makes these sections quite large, they only include publicly exported names (so no static functions, no types defined inside functions), many compilers put different information in them making them very unreliable so most debugger ignore these sections and parse the DWARF on their own. The tables must also be parsed and sorted in order to be used effectively. The new sections can be quickly loaded and very efficiently be used to do name to DIE lookups with very little up front work. The format of these new sections will be changing while we work out the bugs, but we hope to have really fast name to DIE lookups soon. llvm-svn: 138979
192 lines
9.4 KiB
C++
192 lines
9.4 KiB
C++
//===-- ObjectFile.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 "lldb/lldb-private.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/ObjectContainer.h"
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#include "lldb/Symbol/SymbolFile.h"
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using namespace lldb;
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using namespace lldb_private;
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ObjectFile*
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ObjectFile::FindPlugin (Module* module, const FileSpec* file, lldb::addr_t file_offset, lldb::addr_t file_size)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"ObjectFile::FindPlugin (module = %s/%s, file = %p, file_offset = 0x%z8.8x, file_size = 0x%z8.8x)",
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module->GetFileSpec().GetDirectory().AsCString(),
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module->GetFileSpec().GetFilename().AsCString(),
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file, file_offset, file_size);
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std::auto_ptr<ObjectFile> object_file_ap;
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if (module != NULL)
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{
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if (file)
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{
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if (file_size == 0)
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file_size = file->GetByteSize();
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if (file_size == 0)
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{
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// Check for archive file with format "/path/to/archive.a(object.o)"
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char path_with_object[PATH_MAX*2];
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module->GetFileSpec().GetPath(path_with_object, sizeof(path_with_object));
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RegularExpression g_object_regex("(.*)\\(([^\\)]+)\\)$");
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if (g_object_regex.Execute (path_with_object, 2))
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{
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FileSpec archive_file;
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std::string path;
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std::string object;
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if (g_object_regex.GetMatchAtIndex (path_with_object, 1, path) &&
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g_object_regex.GetMatchAtIndex (path_with_object, 2, object))
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{
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archive_file.SetFile (path.c_str(), false);
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file_size = archive_file.GetByteSize();
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if (file_size > 0)
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module->SetFileSpecAndObjectName (archive_file, ConstString(object.c_str()));
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}
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}
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}
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// No need to delegate further if (file_offset, file_size) exceeds the total file size.
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// This is the base case.
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// if (file_offset + file_size > file->GetByteSize())
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// return NULL;
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DataBufferSP file_header_data_sp(file->ReadFileContents(file_offset, 512));
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uint32_t idx;
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// Check if this is a normal object file by iterating through
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// all object file plugin instances.
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ObjectFileCreateInstance create_object_file_callback;
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for (idx = 0; (create_object_file_callback = PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) != NULL; ++idx)
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{
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object_file_ap.reset (create_object_file_callback(module, file_header_data_sp, file, file_offset, file_size));
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if (object_file_ap.get())
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return object_file_ap.release();
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}
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// Check if this is a object container by iterating through
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// all object container plugin instances and then trying to get
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// an object file from the container.
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ObjectContainerCreateInstance create_object_container_callback;
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for (idx = 0; (create_object_container_callback = PluginManager::GetObjectContainerCreateCallbackAtIndex(idx)) != NULL; ++idx)
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{
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std::auto_ptr<ObjectContainer> object_container_ap(create_object_container_callback(module, file_header_data_sp, file, file_offset, file_size));
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if (object_container_ap.get())
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object_file_ap.reset (object_container_ap->GetObjectFile(file));
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if (object_file_ap.get())
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return object_file_ap.release();
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}
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}
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}
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return NULL;
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}
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bool
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ObjectFile::SetModulesArchitecture (const ArchSpec &new_arch)
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{
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return m_module->SetArchitecture (new_arch);
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}
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AddressClass
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ObjectFile::GetAddressClass (lldb::addr_t file_addr)
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{
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Symtab *symtab = GetSymtab();
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if (symtab)
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{
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Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
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if (symbol)
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{
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const AddressRange *range_ptr = symbol->GetAddressRangePtr();
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if (range_ptr)
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{
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const Section *section = range_ptr->GetBaseAddress().GetSection();
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if (section)
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{
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const SectionType section_type = section->GetType();
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switch (section_type)
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{
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case eSectionTypeInvalid: return eAddressClassUnknown;
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case eSectionTypeCode: return eAddressClassCode;
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case eSectionTypeContainer: return eAddressClassUnknown;
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case eSectionTypeData: return eAddressClassData;
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case eSectionTypeDataCString: return eAddressClassData;
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case eSectionTypeDataCStringPointers: return eAddressClassData;
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case eSectionTypeDataSymbolAddress: return eAddressClassData;
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case eSectionTypeData4: return eAddressClassData;
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case eSectionTypeData8: return eAddressClassData;
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case eSectionTypeData16: return eAddressClassData;
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case eSectionTypeDataPointers: return eAddressClassData;
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case eSectionTypeZeroFill: return eAddressClassData;
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case eSectionTypeDataObjCMessageRefs: return eAddressClassData;
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case eSectionTypeDataObjCCFStrings: return eAddressClassData;
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case eSectionTypeDebug: return eAddressClassDebug;
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case eSectionTypeDWARFDebugAbbrev: return eAddressClassDebug;
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case eSectionTypeDWARFDebugAranges: return eAddressClassDebug;
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case eSectionTypeDWARFDebugFrame: return eAddressClassDebug;
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case eSectionTypeDWARFDebugInfo: return eAddressClassDebug;
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case eSectionTypeDWARFDebugLine: return eAddressClassDebug;
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case eSectionTypeDWARFDebugLoc: return eAddressClassDebug;
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case eSectionTypeDWARFDebugMacInfo: return eAddressClassDebug;
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case eSectionTypeDWARFDebugPubNames: return eAddressClassDebug;
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case eSectionTypeDWARFDebugPubTypes: return eAddressClassDebug;
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case eSectionTypeDWARFDebugRanges: return eAddressClassDebug;
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case eSectionTypeDWARFDebugStr: return eAddressClassDebug;
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case eSectionTypeDWARFDebugNames: return eAddressClassDebug;
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case eSectionTypeDWARFDebugTypes: return eAddressClassDebug;
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case eSectionTypeEHFrame: return eAddressClassRuntime;
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case eSectionTypeOther: return eAddressClassUnknown;
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}
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}
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}
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const SymbolType symbol_type = symbol->GetType();
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switch (symbol_type)
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{
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case eSymbolTypeAny: return eAddressClassUnknown;
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case eSymbolTypeAbsolute: return eAddressClassUnknown;
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case eSymbolTypeExtern: return eAddressClassUnknown;
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case eSymbolTypeCode: return eAddressClassCode;
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case eSymbolTypeTrampoline: return eAddressClassCode;
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case eSymbolTypeData: return eAddressClassData;
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case eSymbolTypeRuntime: return eAddressClassRuntime;
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case eSymbolTypeException: return eAddressClassRuntime;
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case eSymbolTypeSourceFile: return eAddressClassDebug;
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case eSymbolTypeHeaderFile: return eAddressClassDebug;
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case eSymbolTypeObjectFile: return eAddressClassDebug;
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case eSymbolTypeCommonBlock: return eAddressClassDebug;
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case eSymbolTypeBlock: return eAddressClassDebug;
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case eSymbolTypeLocal: return eAddressClassData;
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case eSymbolTypeParam: return eAddressClassData;
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case eSymbolTypeVariable: return eAddressClassData;
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case eSymbolTypeVariableType: return eAddressClassDebug;
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case eSymbolTypeLineEntry: return eAddressClassDebug;
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case eSymbolTypeLineHeader: return eAddressClassDebug;
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case eSymbolTypeScopeBegin: return eAddressClassDebug;
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case eSymbolTypeScopeEnd: return eAddressClassDebug;
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case eSymbolTypeAdditional: return eAddressClassUnknown;
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case eSymbolTypeCompiler: return eAddressClassDebug;
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case eSymbolTypeInstrumentation:return eAddressClassDebug;
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case eSymbolTypeUndefined: return eAddressClassUnknown;
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}
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}
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}
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return eAddressClassUnknown;
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}
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