1 //===-- Reproducer.cpp ------------------------------------------*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
9 #include "lldb/Utility/Reproducer.h"
10 #include "lldb/Utility/LLDBAssert.h"
12 #include "llvm/Support/FileSystem.h"
13 #include "llvm/Support/Threading.h"
14 #include "llvm/Support/raw_ostream.h"
16 using namespace lldb_private;
17 using namespace lldb_private::repro;
19 using namespace llvm::yaml;
21 Reproducer &Reproducer::Instance() { return *InstanceImpl(); }
23 llvm::Error Reproducer::Initialize(ReproducerMode mode,
24 llvm::Optional<FileSpec> root) {
25 lldbassert(!InstanceImpl() && "Already initialized.");
26 InstanceImpl().emplace();
29 case ReproducerMode::Capture: {
31 SmallString<128> repro_dir;
32 auto ec = sys::fs::createUniqueDirectory("reproducer", repro_dir);
34 return make_error<StringError>(
35 "unable to create unique reproducer directory", ec);
36 root.emplace(repro_dir);
38 auto ec = sys::fs::create_directory(root->GetPath());
40 return make_error<StringError>("unable to create reproducer directory",
43 return Instance().SetCapture(root);
45 case ReproducerMode::Replay:
46 return Instance().SetReplay(root);
47 case ReproducerMode::Off:
51 return Error::success();
54 bool Reproducer::Initialized() { return InstanceImpl().operator bool(); }
56 void Reproducer::Terminate() {
57 lldbassert(InstanceImpl() && "Already terminated.");
58 InstanceImpl().reset();
61 Optional<Reproducer> &Reproducer::InstanceImpl() {
62 static Optional<Reproducer> g_reproducer;
66 const Generator *Reproducer::GetGenerator() const {
67 std::lock_guard<std::mutex> guard(m_mutex);
69 return &(*m_generator);
73 const Loader *Reproducer::GetLoader() const {
74 std::lock_guard<std::mutex> guard(m_mutex);
80 Generator *Reproducer::GetGenerator() {
81 std::lock_guard<std::mutex> guard(m_mutex);
83 return &(*m_generator);
87 Loader *Reproducer::GetLoader() {
88 std::lock_guard<std::mutex> guard(m_mutex);
94 llvm::Error Reproducer::SetCapture(llvm::Optional<FileSpec> root) {
95 std::lock_guard<std::mutex> guard(m_mutex);
98 return make_error<StringError>(
99 "cannot generate a reproducer when replay one",
100 inconvertibleErrorCode());
104 return Error::success();
107 m_generator.emplace(*root);
108 return Error::success();
111 llvm::Error Reproducer::SetReplay(llvm::Optional<FileSpec> root) {
112 std::lock_guard<std::mutex> guard(m_mutex);
114 if (root && m_generator)
115 return make_error<StringError>(
116 "cannot replay a reproducer when generating one",
117 inconvertibleErrorCode());
121 return Error::success();
124 m_loader.emplace(*root);
125 if (auto e = m_loader->LoadIndex())
128 return Error::success();
131 FileSpec Reproducer::GetReproducerPath() const {
132 if (auto g = GetGenerator())
134 if (auto l = GetLoader())
139 Generator::Generator(const FileSpec &root) : m_root(root), m_done(false) {}
141 Generator::~Generator() {}
143 ProviderBase *Generator::Register(std::unique_ptr<ProviderBase> provider) {
144 std::lock_guard<std::mutex> lock(m_providers_mutex);
145 std::pair<const void *, std::unique_ptr<ProviderBase>> key_value(
146 provider->DynamicClassID(), std::move(provider));
147 auto e = m_providers.insert(std::move(key_value));
148 return e.first->getSecond().get();
151 void Generator::Keep() {
155 for (auto &provider : m_providers)
156 provider.second->Keep();
158 AddProvidersToIndex();
161 void Generator::Discard() {
165 for (auto &provider : m_providers)
166 provider.second->Discard();
168 llvm::sys::fs::remove_directories(m_root.GetPath());
171 const FileSpec &Generator::GetRoot() const { return m_root; }
173 void Generator::AddProvidersToIndex() {
174 FileSpec index = m_root;
175 index.AppendPathComponent("index.yaml");
178 auto strm = llvm::make_unique<raw_fd_ostream>(index.GetPath(), EC,
179 sys::fs::OpenFlags::F_None);
180 yaml::Output yout(*strm);
182 std::vector<std::string> files;
183 files.reserve(m_providers.size());
184 for (auto &provider : m_providers) {
185 files.emplace_back(provider.second->GetFile());
191 Loader::Loader(const FileSpec &root) : m_root(root), m_loaded(false) {}
193 llvm::Error Loader::LoadIndex() {
195 return llvm::Error::success();
197 FileSpec index = m_root.CopyByAppendingPathComponent("index.yaml");
199 auto error_or_file = MemoryBuffer::getFile(index.GetPath());
200 if (auto err = error_or_file.getError())
201 return make_error<StringError>("unable to load reproducer index", err);
203 yaml::Input yin((*error_or_file)->getBuffer());
205 if (auto err = yin.error())
206 return make_error<StringError>("unable to read reproducer index", err);
208 // Sort files to speed up search.
211 // Remember that we've loaded the index.
214 return llvm::Error::success();
217 bool Loader::HasFile(StringRef file) {
219 auto it = std::lower_bound(m_files.begin(), m_files.end(), file.str());
220 return (it != m_files.end()) && (*it == file);
223 llvm::Expected<std::unique_ptr<DataRecorder>>
224 DataRecorder::Create(const FileSpec &filename) {
226 auto recorder = llvm::make_unique<DataRecorder>(std::move(filename), ec);
228 return llvm::errorCodeToError(ec);
229 return std::move(recorder);
232 DataRecorder *CommandProvider::GetNewDataRecorder() {
233 std::size_t i = m_data_recorders.size() + 1;
234 std::string filename = (llvm::Twine(Info::name) + llvm::Twine("-") +
235 llvm::Twine(i) + llvm::Twine(".txt"))
237 auto recorder_or_error =
238 DataRecorder::Create(GetRoot().CopyByAppendingPathComponent(filename));
239 if (!recorder_or_error) {
240 llvm::consumeError(recorder_or_error.takeError());
244 m_data_recorders.push_back(std::move(*recorder_or_error));
245 return m_data_recorders.back().get();
248 void CommandProvider::Keep() {
249 std::vector<std::string> files;
250 for (auto &recorder : m_data_recorders) {
252 files.push_back(recorder->GetFilename().GetPath());
255 FileSpec file = GetRoot().CopyByAppendingPathComponent(Info::file);
257 llvm::raw_fd_ostream os(file.GetPath(), ec, llvm::sys::fs::F_Text);
260 yaml::Output yout(os);
264 void CommandProvider::Discard() { m_data_recorders.clear(); }
266 void VersionProvider::Keep() {
267 FileSpec file = GetRoot().CopyByAppendingPathComponent(Info::file);
269 llvm::raw_fd_ostream os(file.GetPath(), ec, llvm::sys::fs::F_Text);
272 os << m_version << "\n";
275 void ProviderBase::anchor() {}
276 char ProviderBase::ID = 0;
277 char CommandProvider::ID = 0;
278 char FileProvider::ID = 0;
279 char VersionProvider::ID = 0;
280 const char *CommandProvider::Info::file = "command-interpreter.yaml";
281 const char *CommandProvider::Info::name = "command-interpreter";
282 const char *FileProvider::Info::file = "files.yaml";
283 const char *FileProvider::Info::name = "files";
284 const char *VersionProvider::Info::file = "version.txt";
285 const char *VersionProvider::Info::name = "version";