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();
28 // The environment can override the capture mode.
29 if (mode != ReproducerMode::Replay) {
31 llvm::StringRef(getenv("LLDB_CAPTURE_REPRODUCER")).lower();
32 if (env == "0" || env == "off")
33 mode = ReproducerMode::Off;
34 else if (env == "1" || env == "on")
35 mode = ReproducerMode::Capture;
39 case ReproducerMode::Capture: {
41 SmallString<128> repro_dir;
42 auto ec = sys::fs::createUniqueDirectory("reproducer", repro_dir);
44 return make_error<StringError>(
45 "unable to create unique reproducer directory", ec);
46 root.emplace(repro_dir);
48 auto ec = sys::fs::create_directory(root->GetPath());
50 return make_error<StringError>("unable to create reproducer directory",
53 return Instance().SetCapture(root);
55 case ReproducerMode::Replay:
56 return Instance().SetReplay(root);
57 case ReproducerMode::Off:
61 return Error::success();
64 bool Reproducer::Initialized() { return InstanceImpl().operator bool(); }
66 void Reproducer::Terminate() {
67 lldbassert(InstanceImpl() && "Already terminated.");
68 InstanceImpl().reset();
71 Optional<Reproducer> &Reproducer::InstanceImpl() {
72 static Optional<Reproducer> g_reproducer;
76 const Generator *Reproducer::GetGenerator() const {
77 std::lock_guard<std::mutex> guard(m_mutex);
79 return &(*m_generator);
83 const Loader *Reproducer::GetLoader() const {
84 std::lock_guard<std::mutex> guard(m_mutex);
90 Generator *Reproducer::GetGenerator() {
91 std::lock_guard<std::mutex> guard(m_mutex);
93 return &(*m_generator);
97 Loader *Reproducer::GetLoader() {
98 std::lock_guard<std::mutex> guard(m_mutex);
104 llvm::Error Reproducer::SetCapture(llvm::Optional<FileSpec> root) {
105 std::lock_guard<std::mutex> guard(m_mutex);
107 if (root && m_loader)
108 return make_error<StringError>(
109 "cannot generate a reproducer when replay one",
110 inconvertibleErrorCode());
114 return Error::success();
117 m_generator.emplace(*root);
118 return Error::success();
121 llvm::Error Reproducer::SetReplay(llvm::Optional<FileSpec> root) {
122 std::lock_guard<std::mutex> guard(m_mutex);
124 if (root && m_generator)
125 return make_error<StringError>(
126 "cannot replay a reproducer when generating one",
127 inconvertibleErrorCode());
131 return Error::success();
134 m_loader.emplace(*root);
135 if (auto e = m_loader->LoadIndex())
138 return Error::success();
141 FileSpec Reproducer::GetReproducerPath() const {
142 if (auto g = GetGenerator())
144 if (auto l = GetLoader())
149 static FileSpec MakeAbsolute(FileSpec file_spec) {
150 SmallString<128> path;
151 file_spec.GetPath(path, false);
152 llvm::sys::fs::make_absolute(path);
153 return FileSpec(path, file_spec.GetPathStyle());
156 Generator::Generator(FileSpec root) : m_root(MakeAbsolute(std::move(root))) {
157 GetOrCreate<repro::WorkingDirectoryProvider>();
160 Generator::~Generator() {
165 ProviderBase *Generator::Register(std::unique_ptr<ProviderBase> provider) {
166 std::lock_guard<std::mutex> lock(m_providers_mutex);
167 std::pair<const void *, std::unique_ptr<ProviderBase>> key_value(
168 provider->DynamicClassID(), std::move(provider));
169 auto e = m_providers.insert(std::move(key_value));
170 return e.first->getSecond().get();
173 void Generator::Keep() {
177 for (auto &provider : m_providers)
178 provider.second->Keep();
180 AddProvidersToIndex();
183 void Generator::Discard() {
187 for (auto &provider : m_providers)
188 provider.second->Discard();
190 llvm::sys::fs::remove_directories(m_root.GetPath());
193 const FileSpec &Generator::GetRoot() const { return m_root; }
195 void Generator::AddProvidersToIndex() {
196 FileSpec index = m_root;
197 index.AppendPathComponent("index.yaml");
200 auto strm = std::make_unique<raw_fd_ostream>(index.GetPath(), EC,
201 sys::fs::OpenFlags::OF_None);
202 yaml::Output yout(*strm);
204 std::vector<std::string> files;
205 files.reserve(m_providers.size());
206 for (auto &provider : m_providers) {
207 files.emplace_back(provider.second->GetFile());
213 Loader::Loader(FileSpec root)
214 : m_root(MakeAbsolute(std::move(root))), m_loaded(false) {}
216 llvm::Error Loader::LoadIndex() {
218 return llvm::Error::success();
220 FileSpec index = m_root.CopyByAppendingPathComponent("index.yaml");
222 auto error_or_file = MemoryBuffer::getFile(index.GetPath());
223 if (auto err = error_or_file.getError())
224 return make_error<StringError>("unable to load reproducer index", err);
226 yaml::Input yin((*error_or_file)->getBuffer());
228 if (auto err = yin.error())
229 return make_error<StringError>("unable to read reproducer index", err);
231 // Sort files to speed up search.
234 // Remember that we've loaded the index.
237 return llvm::Error::success();
240 bool Loader::HasFile(StringRef file) {
242 auto it = std::lower_bound(m_files.begin(), m_files.end(), file.str());
243 return (it != m_files.end()) && (*it == file);
246 llvm::Expected<std::unique_ptr<DataRecorder>>
247 DataRecorder::Create(const FileSpec &filename) {
249 auto recorder = std::make_unique<DataRecorder>(std::move(filename), ec);
251 return llvm::errorCodeToError(ec);
252 return std::move(recorder);
255 DataRecorder *CommandProvider::GetNewDataRecorder() {
256 std::size_t i = m_data_recorders.size() + 1;
257 std::string filename = (llvm::Twine(Info::name) + llvm::Twine("-") +
258 llvm::Twine(i) + llvm::Twine(".yaml"))
260 auto recorder_or_error =
261 DataRecorder::Create(GetRoot().CopyByAppendingPathComponent(filename));
262 if (!recorder_or_error) {
263 llvm::consumeError(recorder_or_error.takeError());
267 m_data_recorders.push_back(std::move(*recorder_or_error));
268 return m_data_recorders.back().get();
271 void CommandProvider::Keep() {
272 std::vector<std::string> files;
273 for (auto &recorder : m_data_recorders) {
275 files.push_back(recorder->GetFilename().GetPath());
278 FileSpec file = GetRoot().CopyByAppendingPathComponent(Info::file);
280 llvm::raw_fd_ostream os(file.GetPath(), ec, llvm::sys::fs::OF_Text);
283 yaml::Output yout(os);
287 void CommandProvider::Discard() { m_data_recorders.clear(); }
289 void VersionProvider::Keep() {
290 FileSpec file = GetRoot().CopyByAppendingPathComponent(Info::file);
292 llvm::raw_fd_ostream os(file.GetPath(), ec, llvm::sys::fs::OF_Text);
295 os << m_version << "\n";
298 void WorkingDirectoryProvider::Keep() {
299 FileSpec file = GetRoot().CopyByAppendingPathComponent(Info::file);
301 llvm::raw_fd_ostream os(file.GetPath(), ec, llvm::sys::fs::OF_Text);
307 void ProviderBase::anchor() {}
308 char CommandProvider::ID = 0;
309 char FileProvider::ID = 0;
310 char ProviderBase::ID = 0;
311 char VersionProvider::ID = 0;
312 char WorkingDirectoryProvider::ID = 0;
313 const char *CommandProvider::Info::file = "command-interpreter.yaml";
314 const char *CommandProvider::Info::name = "command-interpreter";
315 const char *FileProvider::Info::file = "files.yaml";
316 const char *FileProvider::Info::name = "files";
317 const char *VersionProvider::Info::file = "version.txt";
318 const char *VersionProvider::Info::name = "version";
319 const char *WorkingDirectoryProvider::Info::file = "cwd.txt";
320 const char *WorkingDirectoryProvider::Info::name = "cwd";