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//===-- SymbolVendor.cpp --------------------------------------------------===//
//
// 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 "lldb/Symbol/SymbolVendor.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
// FindPlugin
//
// Platforms can register a callback to use when creating symbol vendors to
// allow for complex debug information file setups, and to also allow for
// finding separate debug information files.
SymbolVendor *SymbolVendor::FindPlugin(const lldb::ModuleSP &module_sp,
lldb_private::Stream *feedback_strm) {
std::unique_ptr<SymbolVendor> instance_up;
SymbolVendorCreateInstance create_callback;
for (size_t idx = 0;
(create_callback = PluginManager::GetSymbolVendorCreateCallbackAtIndex(
idx)) != nullptr;
++idx) {
instance_up.reset(create_callback(module_sp, feedback_strm));
if (instance_up) {
return instance_up.release();
}
}
// The default implementation just tries to create debug information using
// the file representation for the module.
ObjectFileSP sym_objfile_sp;
FileSpec sym_spec = module_sp->GetSymbolFileFileSpec();
if (sym_spec && sym_spec != module_sp->GetObjectFile()->GetFileSpec()) {
DataBufferSP data_sp;
offset_t data_offset = 0;
sym_objfile_sp = ObjectFile::FindPlugin(
module_sp, &sym_spec, 0, FileSystem::Instance().GetByteSize(sym_spec),
data_sp, data_offset);
}
if (!sym_objfile_sp)
sym_objfile_sp = module_sp->GetObjectFile()->shared_from_this();
instance_up = std::make_unique<SymbolVendor>(module_sp);
instance_up->AddSymbolFileRepresentation(sym_objfile_sp);
return instance_up.release();
}
// SymbolVendor constructor
SymbolVendor::SymbolVendor(const lldb::ModuleSP &module_sp)
: ModuleChild(module_sp), m_sym_file_up() {}
// Add a representation given an object file.
void SymbolVendor::AddSymbolFileRepresentation(const ObjectFileSP &objfile_sp) {
ModuleSP module_sp(GetModule());
if (module_sp) {
std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
if (objfile_sp)
m_sym_file_up.reset(SymbolFile::FindPlugin(objfile_sp));
}
}
void SymbolVendor::SectionFileAddressesChanged() {
if (m_sym_file_up)
m_sym_file_up->SectionFileAddressesChanged();
}
std::vector<DataBufferSP>
SymbolVendor::GetASTData(lldb::LanguageType language) {
std::vector<DataBufferSP> ast_datas;
if (language != eLanguageTypeSwift)
return ast_datas;
// Sometimes the AST Section data is found from the module, so look there
// first:
SectionList *section_list = GetModule()->GetSectionList();
if (section_list) {
SectionSP section_sp(
section_list->FindSectionByType(eSectionTypeSwiftModules, true));
if (section_sp) {
DataExtractor section_data;
if (section_sp->GetSectionData(section_data)) {
ast_datas.push_back(DataBufferSP(
new DataBufferHeap((const char *)section_data.GetDataStart(),
section_data.GetByteSize())));
return ast_datas;
}
}
}
// If we couldn't find it in the Module, then look for it in the SymbolFile:
SymbolFile *sym_file = GetSymbolFile();
if (sym_file)
ast_datas = sym_file->GetASTData(language);
return ast_datas;
}
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