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//===--------------------- ModuleCache.cpp ----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ModuleCache.h"
#include "lldb/Core/Module.h"
#include "lldb/Host/FileSystem.h"
#include "llvm/Support/FileSystem.h"
#include <assert.h>
#include <cstdio>
#
using namespace lldb;
using namespace lldb_private;
namespace {
const char* kModulesSubdir = ".cache";
FileSpec
JoinPath (const FileSpec &path1, const char* path2)
{
FileSpec result_spec (path1);
result_spec.AppendPathComponent (path2);
return result_spec;
}
Error
MakeDirectory (const FileSpec &dir_path)
{
if (dir_path.Exists ())
{
if (!dir_path.IsDirectory ())
return Error ("Invalid existing path");
return Error ();
}
return FileSystem::MakeDirectory (dir_path.GetPath ().c_str (),
eFilePermissionsDirectoryDefault);
}
} // namespace
Error
ModuleCache::Put (const FileSpec &root_dir_spec,
const char *hostname,
const UUID &uuid,
const FileSpec &platform_module_spec,
const FileSpec &tmp_file)
{
const auto module_spec_dir = GetModuleDirectory (root_dir_spec, uuid);
auto error = MakeDirectory (module_spec_dir);
if (error.Fail ())
return error;
const auto module_file_path = JoinPath (module_spec_dir, platform_module_spec.GetFilename ().AsCString ());
const auto tmp_file_path = tmp_file.GetPath ();
const auto err_code = llvm::sys::fs::copy_file (tmp_file_path.c_str (), module_file_path.GetPath ().c_str ());
if (err_code)
{
error.SetErrorStringWithFormat ("failed to copy file %s to %s: %s",
tmp_file_path.c_str (),
module_file_path.GetPath ().c_str (),
err_code.message ().c_str ());
}
// Create sysroot link to a module.
const auto sysroot_module_path_spec = GetHostSysRootModulePath (root_dir_spec, hostname, platform_module_spec);
return CreateHostSysRootModuleSymLink (sysroot_module_path_spec, module_file_path);
}
Error
ModuleCache::Get (const FileSpec &root_dir_spec,
const char *hostname,
const UUID &uuid,
const FileSpec &platform_module_spec,
FileSpec &cached_module_spec)
{
cached_module_spec.Clear ();
const auto module_spec_dir = GetModuleDirectory (root_dir_spec, uuid);
const auto module_file_path = JoinPath (module_spec_dir, platform_module_spec.GetFilename ().AsCString ());
Error error;
if (!module_file_path.Exists ())
{
error.SetErrorStringWithFormat ("module %s not found", module_file_path.GetPath ().c_str ());
return error;
}
cached_module_spec = module_file_path;
// We may have already cached module but downloaded from an another host - in this case let's create a symlink to it.
const auto sysroot_module_path_spec = GetHostSysRootModulePath (root_dir_spec, hostname, platform_module_spec);
if (!sysroot_module_path_spec.Exists ())
CreateHostSysRootModuleSymLink (sysroot_module_path_spec, cached_module_spec);
return error;
}
FileSpec
ModuleCache::GetModuleDirectory (const FileSpec &root_dir_spec, const UUID &uuid)
{
const auto modules_dir_spec = JoinPath (root_dir_spec, kModulesSubdir);
return JoinPath (modules_dir_spec, uuid.GetAsString ().c_str ());
}
FileSpec
ModuleCache::GetHostSysRootModulePath (const FileSpec &root_dir_spec, const char *hostname, const FileSpec &platform_module_spec)
{
const auto sysroot_dir = JoinPath (root_dir_spec, hostname);
return JoinPath (sysroot_dir, platform_module_spec.GetPath ().c_str ());
}
Error
ModuleCache::CreateHostSysRootModuleSymLink (const FileSpec &sysroot_module_path_spec, const FileSpec &module_file_path)
{
const auto error = MakeDirectory (FileSpec (sysroot_module_path_spec.GetDirectory ().AsCString (), false));
if (error.Fail ())
return error;
return FileSystem::Symlink (sysroot_module_path_spec.GetPath ().c_str (),
module_file_path.GetPath ().c_str ());
}
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