745e8bfd1a
This completes the conversion of LocateSymbolFile into a SymbolLocator plugin. The only remaining function is DownloadSymbolFileAsync which doesn't really fit into the plugin model, and therefore moves into the SymbolLocator class, while still relying on the plugins to do the underlying work.
144 lines
5.2 KiB
C++
144 lines
5.2 KiB
C++
//===-- SymbolVendorELF.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 "SymbolVendorELF.h"
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#include <cstring>
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#include "Plugins/ObjectFile/ELF/ObjectFileELF.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleSpec.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/StreamString.h"
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#include "lldb/Utility/Timer.h"
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using namespace lldb;
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using namespace lldb_private;
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LLDB_PLUGIN_DEFINE(SymbolVendorELF)
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// SymbolVendorELF constructor
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SymbolVendorELF::SymbolVendorELF(const lldb::ModuleSP &module_sp)
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: SymbolVendor(module_sp) {}
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void SymbolVendorELF::Initialize() {
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PluginManager::RegisterPlugin(GetPluginNameStatic(),
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GetPluginDescriptionStatic(), CreateInstance);
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}
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void SymbolVendorELF::Terminate() {
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PluginManager::UnregisterPlugin(CreateInstance);
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}
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llvm::StringRef SymbolVendorELF::GetPluginDescriptionStatic() {
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return "Symbol vendor for ELF that looks for dSYM files that match "
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"executables.";
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}
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// CreateInstance
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//
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// Platforms can register a callback to use when creating symbol vendors to
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// allow for complex debug information file setups, and to also allow for
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// finding separate debug information files.
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SymbolVendor *
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SymbolVendorELF::CreateInstance(const lldb::ModuleSP &module_sp,
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lldb_private::Stream *feedback_strm) {
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if (!module_sp)
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return nullptr;
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ObjectFileELF *obj_file =
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llvm::dyn_cast_or_null<ObjectFileELF>(module_sp->GetObjectFile());
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if (!obj_file)
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return nullptr;
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lldb_private::UUID uuid = obj_file->GetUUID();
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if (!uuid)
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return nullptr;
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// If the main object file already contains debug info, then we are done.
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if (obj_file->GetSectionList()->FindSectionByType(
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lldb::eSectionTypeDWARFDebugInfo, true))
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return nullptr;
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// If the module specified a filespec, use that.
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FileSpec fspec = module_sp->GetSymbolFileFileSpec();
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// Otherwise, try gnu_debuglink, if one exists.
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if (!fspec)
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fspec = obj_file->GetDebugLink().value_or(FileSpec());
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LLDB_SCOPED_TIMERF("SymbolVendorELF::CreateInstance (module = %s)",
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module_sp->GetFileSpec().GetPath().c_str());
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ModuleSpec module_spec;
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module_spec.GetFileSpec() = obj_file->GetFileSpec();
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FileSystem::Instance().Resolve(module_spec.GetFileSpec());
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module_spec.GetSymbolFileSpec() = fspec;
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module_spec.GetUUID() = uuid;
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FileSpecList search_paths = Target::GetDefaultDebugFileSearchPaths();
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FileSpec dsym_fspec =
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PluginManager::LocateExecutableSymbolFile(module_spec, search_paths);
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if (!dsym_fspec)
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return nullptr;
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DataBufferSP dsym_file_data_sp;
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lldb::offset_t dsym_file_data_offset = 0;
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ObjectFileSP dsym_objfile_sp = ObjectFile::FindPlugin(
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module_sp, &dsym_fspec, 0, FileSystem::Instance().GetByteSize(dsym_fspec),
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dsym_file_data_sp, dsym_file_data_offset);
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if (!dsym_objfile_sp)
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return nullptr;
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// This objfile is for debugging purposes. Sadly, ObjectFileELF won't
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// be able to figure this out consistently as the symbol file may not
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// have stripped the code sections, etc.
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dsym_objfile_sp->SetType(ObjectFile::eTypeDebugInfo);
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SymbolVendorELF *symbol_vendor = new SymbolVendorELF(module_sp);
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// Get the module unified section list and add our debug sections to
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// that.
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SectionList *module_section_list = module_sp->GetSectionList();
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SectionList *objfile_section_list = dsym_objfile_sp->GetSectionList();
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if (!module_section_list || !objfile_section_list)
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return nullptr;
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static const SectionType g_sections[] = {
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eSectionTypeDWARFDebugAbbrev, eSectionTypeDWARFDebugAddr,
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eSectionTypeDWARFDebugAranges, eSectionTypeDWARFDebugCuIndex,
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eSectionTypeDWARFDebugFrame, eSectionTypeDWARFDebugInfo,
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eSectionTypeDWARFDebugLine, eSectionTypeDWARFDebugLineStr,
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eSectionTypeDWARFDebugLoc, eSectionTypeDWARFDebugLocLists,
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eSectionTypeDWARFDebugMacInfo, eSectionTypeDWARFDebugMacro,
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eSectionTypeDWARFDebugNames, eSectionTypeDWARFDebugPubNames,
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eSectionTypeDWARFDebugPubTypes, eSectionTypeDWARFDebugRanges,
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eSectionTypeDWARFDebugRngLists, eSectionTypeDWARFDebugStr,
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eSectionTypeDWARFDebugStrOffsets, eSectionTypeDWARFDebugTypes,
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eSectionTypeELFSymbolTable, eSectionTypeDWARFGNUDebugAltLink,
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};
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for (SectionType section_type : g_sections) {
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if (SectionSP section_sp =
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objfile_section_list->FindSectionByType(section_type, true)) {
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if (SectionSP module_section_sp =
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module_section_list->FindSectionByType(section_type, true))
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module_section_list->ReplaceSection(module_section_sp->GetID(),
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section_sp);
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else
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module_section_list->AddSection(section_sp);
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}
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}
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symbol_vendor->AddSymbolFileRepresentation(dsym_objfile_sp);
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return symbol_vendor;
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}
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