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.
140 lines
5.1 KiB
C++
140 lines
5.1 KiB
C++
//===-- SymbolVendorWasm.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 "SymbolVendorWasm.h"
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#include <cstring>
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#include <optional>
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#include "Plugins/ObjectFile/wasm/ObjectFileWasm.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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using namespace lldb_private::wasm;
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LLDB_PLUGIN_DEFINE(SymbolVendorWasm)
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// SymbolVendorWasm constructor
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SymbolVendorWasm::SymbolVendorWasm(const lldb::ModuleSP &module_sp)
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: SymbolVendor(module_sp) {}
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void SymbolVendorWasm::Initialize() {
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PluginManager::RegisterPlugin(GetPluginNameStatic(),
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GetPluginDescriptionStatic(), CreateInstance);
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}
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void SymbolVendorWasm::Terminate() {
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PluginManager::UnregisterPlugin(CreateInstance);
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}
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llvm::StringRef SymbolVendorWasm::GetPluginDescriptionStatic() {
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return "Symbol vendor for WASM that looks for dwo 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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SymbolVendorWasm::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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ObjectFileWasm *obj_file =
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llvm::dyn_cast_or_null<ObjectFileWasm>(module_sp->GetObjectFile());
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if (!obj_file)
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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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LLDB_SCOPED_TIMERF("SymbolVendorWasm::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.GetUUID() = obj_file->GetUUID();
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// A Wasm module may have a custom section named "external_debug_info" whose
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// content is the absolute or relative path of the Wasm module that contains
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// debug symbols for this module.
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std::optional<FileSpec> symbol_file_spec =
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obj_file->GetExternalDebugInfoFileSpec();
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if (!symbol_file_spec)
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return nullptr;
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module_spec.GetSymbolFileSpec() = *symbol_file_spec;
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FileSpecList search_paths = Target::GetDefaultDebugFileSearchPaths();
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FileSpec sym_fspec =
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PluginManager::LocateExecutableSymbolFile(module_spec, search_paths);
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if (!sym_fspec)
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return nullptr;
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DataBufferSP sym_file_data_sp;
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lldb::offset_t sym_file_data_offset = 0;
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ObjectFileSP sym_objfile_sp = ObjectFile::FindPlugin(
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module_sp, &sym_fspec, 0, FileSystem::Instance().GetByteSize(sym_fspec),
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sym_file_data_sp, sym_file_data_offset);
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if (!sym_objfile_sp)
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return nullptr;
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// This objfile is for debugging purposes.
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sym_objfile_sp->SetType(ObjectFile::eTypeDebugInfo);
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SymbolVendorWasm *symbol_vendor = new SymbolVendorWasm(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 = sym_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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eSectionTypeDWARFDebugPubNames, eSectionTypeDWARFDebugPubTypes,
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eSectionTypeDWARFDebugRanges, eSectionTypeDWARFDebugRngLists,
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eSectionTypeDWARFDebugStr, eSectionTypeDWARFDebugStrOffsets,
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eSectionTypeDWARFDebugTypes};
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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(sym_objfile_sp);
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return symbol_vendor;
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}
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