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//===-- Reproducer.cpp ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/Reproducer.h"
#include "lldb/Utility/LLDBAssert.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Threading.h"
#include "llvm/Support/raw_ostream.h"
using namespace lldb_private;
using namespace lldb_private::repro;
using namespace llvm;
using namespace llvm::yaml;
Reproducer &Reproducer::Instance() { return *InstanceImpl(); }
llvm::Error Reproducer::Initialize(ReproducerMode mode,
llvm::Optional<FileSpec> root) {
lldbassert(!InstanceImpl() && "Already initialized.");
InstanceImpl().emplace();
switch (mode) {
case ReproducerMode::Capture: {
if (!root) {
SmallString<128> repro_dir;
auto ec = sys::fs::createUniqueDirectory("reproducer", repro_dir);
if (ec)
return make_error<StringError>(
"unable to create unique reproducer directory", ec);
root.emplace(repro_dir);
} else {
auto ec = sys::fs::create_directory(root->GetPath());
if (ec)
return make_error<StringError>("unable to create reproducer directory",
ec);
}
return Instance().SetCapture(root);
} break;
case ReproducerMode::Replay:
return Instance().SetReplay(root);
case ReproducerMode::Off:
break;
};
return Error::success();
}
void Reproducer::Terminate() {
lldbassert(InstanceImpl() && "Already terminated.");
InstanceImpl().reset();
}
Optional<Reproducer> &Reproducer::InstanceImpl() {
static Optional<Reproducer> g_reproducer;
return g_reproducer;
}
const Generator *Reproducer::GetGenerator() const {
std::lock_guard<std::mutex> guard(m_mutex);
if (m_generator)
return &(*m_generator);
return nullptr;
}
const Loader *Reproducer::GetLoader() const {
std::lock_guard<std::mutex> guard(m_mutex);
if (m_loader)
return &(*m_loader);
return nullptr;
}
Generator *Reproducer::GetGenerator() {
std::lock_guard<std::mutex> guard(m_mutex);
if (m_generator)
return &(*m_generator);
return nullptr;
}
Loader *Reproducer::GetLoader() {
std::lock_guard<std::mutex> guard(m_mutex);
if (m_loader)
return &(*m_loader);
return nullptr;
}
llvm::Error Reproducer::SetCapture(llvm::Optional<FileSpec> root) {
std::lock_guard<std::mutex> guard(m_mutex);
if (root && m_loader)
return make_error<StringError>(
"cannot generate a reproducer when replay one",
inconvertibleErrorCode());
if (!root) {
m_generator.reset();
return Error::success();
}
m_generator.emplace(*root);
return Error::success();
}
llvm::Error Reproducer::SetReplay(llvm::Optional<FileSpec> root) {
std::lock_guard<std::mutex> guard(m_mutex);
if (root && m_generator)
return make_error<StringError>(
"cannot replay a reproducer when generating one",
inconvertibleErrorCode());
if (!root) {
m_loader.reset();
return Error::success();
}
m_loader.emplace(*root);
if (auto e = m_loader->LoadIndex())
return e;
return Error::success();
}
FileSpec Reproducer::GetReproducerPath() const {
if (auto g = GetGenerator())
return g->GetRoot();
if (auto l = GetLoader())
return l->GetRoot();
return {};
}
Generator::Generator(const FileSpec &root) : m_root(root), m_done(false) {}
Generator::~Generator() {}
ProviderBase *Generator::Register(std::unique_ptr<ProviderBase> provider) {
std::lock_guard<std::mutex> lock(m_providers_mutex);
std::pair<const void *, std::unique_ptr<ProviderBase>> key_value(
provider->DynamicClassID(), std::move(provider));
auto e = m_providers.insert(std::move(key_value));
return e.first->getSecond().get();
}
void Generator::Keep() {
assert(!m_done);
m_done = true;
for (auto &provider : m_providers)
provider.second->Keep();
AddProvidersToIndex();
}
void Generator::Discard() {
assert(!m_done);
m_done = true;
for (auto &provider : m_providers)
provider.second->Discard();
llvm::sys::fs::remove_directories(m_root.GetPath());
}
const FileSpec &Generator::GetRoot() const { return m_root; }
void Generator::AddProvidersToIndex() {
FileSpec index = m_root;
index.AppendPathComponent("index.yaml");
std::error_code EC;
auto strm = llvm::make_unique<raw_fd_ostream>(index.GetPath(), EC,
sys::fs::OpenFlags::F_None);
yaml::Output yout(*strm);
std::vector<std::string> files;
files.reserve(m_providers.size());
for (auto &provider : m_providers) {
files.emplace_back(provider.second->GetFile());
}
yout << files;
}
Loader::Loader(const FileSpec &root) : m_root(root), m_loaded(false) {}
llvm::Error Loader::LoadIndex() {
if (m_loaded)
return llvm::Error::success();
FileSpec index = m_root.CopyByAppendingPathComponent("index.yaml");
auto error_or_file = MemoryBuffer::getFile(index.GetPath());
if (auto err = error_or_file.getError())
return make_error<StringError>("unable to load reproducer index", err);
yaml::Input yin((*error_or_file)->getBuffer());
yin >> m_files;
if (auto err = yin.error())
return make_error<StringError>("unable to read reproducer index", err);
// Sort files to speed up search.
llvm::sort(m_files);
// Remember that we've loaded the index.
m_loaded = true;
return llvm::Error::success();
}
bool Loader::HasFile(StringRef file) {
assert(m_loaded);
auto it = std::lower_bound(m_files.begin(), m_files.end(), file.str());
return (it != m_files.end()) && (*it == file);
}
void ProviderBase::anchor() {}
char ProviderBase::ID = 0;
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