Error ModuleCache::GetAndPut(const FileSpec &root_dir_spec,
const char *hostname,
const ModuleSpec &module_spec,
const ModuleDownloader &module_downloader,
const SymfileDownloader &symfile_downloader,
lldb::ModuleSP &cached_module_sp,
bool *did_create_ptr) {
const auto module_spec_dir =
GetModuleDirectory(root_dir_spec, module_spec.GetUUID());
auto error = MakeDirectory(module_spec_dir);
if (error.Fail())
return error;
ModuleLock lock(root_dir_spec, module_spec.GetUUID(), error);
if (error.Fail())
return Error("Failed to lock module %s: %s",
module_spec.GetUUID().GetAsString().c_str(),
error.AsCString());
const auto escaped_hostname(GetEscapedHostname(hostname));
// Check local cache for a module.
error = Get(root_dir_spec, escaped_hostname.c_str(), module_spec,
cached_module_sp, did_create_ptr);
if (error.Success())
return error;
const auto tmp_download_file_spec = JoinPath(module_spec_dir, kTempFileName);
error = module_downloader(module_spec, tmp_download_file_spec);
llvm::FileRemover tmp_file_remover(tmp_download_file_spec.GetPath().c_str());
if (error.Fail())
return Error("Failed to download module: %s", error.AsCString());
// Put downloaded file into local module cache.
error = Put(root_dir_spec, escaped_hostname.c_str(), module_spec,
tmp_download_file_spec, module_spec.GetFileSpec());
if (error.Fail())
return Error("Failed to put module into cache: %s", error.AsCString());
tmp_file_remover.releaseFile();
error = Get(root_dir_spec, escaped_hostname.c_str(), module_spec,
cached_module_sp, did_create_ptr);
if (error.Fail())
return error;
// Fetching a symbol file for the module
const auto tmp_download_sym_file_spec =
JoinPath(module_spec_dir, kTempSymFileName);
error = symfile_downloader(cached_module_sp, tmp_download_sym_file_spec);
llvm::FileRemover tmp_symfile_remover(
tmp_download_sym_file_spec.GetPath().c_str());
if (error.Fail())
// Failed to download a symfile but fetching the module was successful. The
// module might
// contain the necessary symbols and the debugging is also possible without
// a symfile.
return Error();
error = Put(root_dir_spec, escaped_hostname.c_str(), module_spec,
tmp_download_sym_file_spec,
GetSymbolFileSpec(module_spec.GetFileSpec()));
if (error.Fail())
return Error("Failed to put symbol file into cache: %s", error.AsCString());
tmp_symfile_remover.releaseFile();
FileSpec symfile_spec = GetSymbolFileSpec(cached_module_sp->GetFileSpec());
cached_module_sp->SetSymbolFileFileSpec(symfile_spec);
return Error();
}
Error
ModuleCache::GetAndPut (const FileSpec &root_dir_spec,
const char *hostname,
const ModuleSpec &module_spec,
const ModuleDownloader &module_downloader,
const SymfileDownloader &symfile_downloader,
lldb::ModuleSP &cached_module_sp,
bool *did_create_ptr)
{
const auto module_spec_dir = GetModuleDirectory (root_dir_spec, module_spec.GetUUID ());
auto error = MakeDirectory (module_spec_dir);
if (error.Fail ())
return error;
// Open lock file.
const auto lock_file_spec = JoinPath (module_spec_dir, kLockFileName);
File lock_file (lock_file_spec, File::eOpenOptionWrite | File::eOpenOptionCanCreate | File::eOpenOptionCloseOnExec);
if (!lock_file)
{
error.SetErrorToErrno ();
return Error("Failed to open lock file %s: %s", lock_file_spec.GetPath ().c_str (), error.AsCString ());
}
LockFile lock (lock_file.GetDescriptor ());
error = lock.WriteLock (0, 1);
if (error.Fail ())
return Error("Failed to lock file %s:%s", lock_file_spec.GetPath ().c_str (), error.AsCString ());
// Check local cache for a module.
error = Get (root_dir_spec, hostname, module_spec, cached_module_sp, did_create_ptr);
if (error.Success ())
return error;
const auto tmp_download_file_spec = JoinPath (module_spec_dir, kTempFileName);
error = module_downloader (module_spec, tmp_download_file_spec);
llvm::FileRemover tmp_file_remover (tmp_download_file_spec.GetPath ().c_str ());
if (error.Fail ())
return Error("Failed to download module: %s", error.AsCString ());
// Put downloaded file into local module cache.
error = Put (root_dir_spec, hostname, module_spec, tmp_download_file_spec, module_spec.GetFileSpec ());
if (error.Fail ())
return Error ("Failed to put module into cache: %s", error.AsCString ());
tmp_file_remover.releaseFile ();
error = Get (root_dir_spec, hostname, module_spec, cached_module_sp, did_create_ptr);
if (error.Fail ())
return error;
// Fetching a symbol file for the module
const auto tmp_download_sym_file_spec = JoinPath (module_spec_dir, kTempSymFileName);
error = symfile_downloader (cached_module_sp, tmp_download_sym_file_spec);
llvm::FileRemover tmp_symfile_remover (tmp_download_sym_file_spec.GetPath ().c_str ());
if (error.Fail ())
// Failed to download a symfile but fetching the module was successful. The module might
// contain the neccessary symbols and the debugging is also possible without a symfile.
return Error ();
FileSpec symfile_spec = GetSymbolFileSpec (cached_module_sp->GetFileSpec ());
error = Put (root_dir_spec, hostname, module_spec, tmp_download_sym_file_spec, symfile_spec);
if (error.Fail ())
return Error ("Failed to put symbol file into cache: %s", error.AsCString ());
tmp_symfile_remover.releaseFile();
cached_module_sp->SetSymbolFileFileSpec (symfile_spec);
return Error ();
}