1//===-- SymbolVendor.cpp --------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Symbol/SymbolVendor.h"
10
11#include "lldb/Core/Module.h"
12#include "lldb/Core/PluginManager.h"
13#include "lldb/Symbol/CompileUnit.h"
14#include "lldb/Symbol/ObjectFile.h"
15#include "lldb/Symbol/SymbolFile.h"
16#include "lldb/Utility/Stream.h"
17
18using namespace lldb;
19using namespace lldb_private;
20
21// FindPlugin
22//
23// Platforms can register a callback to use when creating symbol vendors to
24// allow for complex debug information file setups, and to also allow for
25// finding separate debug information files.
26SymbolVendor *SymbolVendor::FindPlugin(const lldb::ModuleSP &module_sp,
27                                       lldb_private::Stream *feedback_strm) {
28  std::unique_ptr<SymbolVendor> instance_up;
29  SymbolVendorCreateInstance create_callback;
30
31  for (size_t idx = 0;
32       (create_callback = PluginManager::GetSymbolVendorCreateCallbackAtIndex(
33            idx)) != nullptr;
34       ++idx) {
35    instance_up.reset(create_callback(module_sp, feedback_strm));
36
37    if (instance_up) {
38      return instance_up.release();
39    }
40  }
41  // The default implementation just tries to create debug information using
42  // the file representation for the module.
43  ObjectFileSP sym_objfile_sp;
44  FileSpec sym_spec = module_sp->GetSymbolFileFileSpec();
45  if (sym_spec && sym_spec != module_sp->GetObjectFile()->GetFileSpec()) {
46    DataBufferSP data_sp;
47    offset_t data_offset = 0;
48    sym_objfile_sp = ObjectFile::FindPlugin(
49        module_sp, &sym_spec, 0, FileSystem::Instance().GetByteSize(sym_spec),
50        data_sp, data_offset);
51  }
52  if (!sym_objfile_sp)
53    sym_objfile_sp = module_sp->GetObjectFile()->shared_from_this();
54  instance_up = std::make_unique<SymbolVendor>(module_sp);
55  instance_up->AddSymbolFileRepresentation(sym_objfile_sp);
56  return instance_up.release();
57}
58
59// SymbolVendor constructor
60SymbolVendor::SymbolVendor(const lldb::ModuleSP &module_sp)
61    : ModuleChild(module_sp), m_sym_file_up() {}
62
63// Add a representation given an object file.
64void SymbolVendor::AddSymbolFileRepresentation(const ObjectFileSP &objfile_sp) {
65  ModuleSP module_sp(GetModule());
66  if (module_sp) {
67    std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
68    if (objfile_sp)
69      m_sym_file_up.reset(SymbolFile::FindPlugin(objfile_sp));
70  }
71}
72