1 //===-- FileCache.cpp -------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "lldb/Host/FileCache.h"
12 #include "lldb/Host/File.h"
13 #include "lldb/Host/FileSystem.h"
16 using namespace lldb_private;
18 FileCache *FileCache::m_instance = nullptr;
20 FileCache &FileCache::GetInstance() {
21 if (m_instance == nullptr)
22 m_instance = new FileCache();
27 lldb::user_id_t FileCache::OpenFile(const FileSpec &file_spec, uint32_t flags,
28 uint32_t mode, Status &error) {
30 error.SetErrorString("empty path");
33 FileSP file_sp(new File());
34 error = FileSystem::Instance().Open(*file_sp, file_spec, flags, mode);
35 if (!file_sp->IsValid())
37 lldb::user_id_t fd = file_sp->GetDescriptor();
38 m_cache[fd] = file_sp;
42 bool FileCache::CloseFile(lldb::user_id_t fd, Status &error) {
43 if (fd == UINT64_MAX) {
44 error.SetErrorString("invalid file descriptor");
47 FDToFileMap::iterator pos = m_cache.find(fd);
48 if (pos == m_cache.end()) {
49 error.SetErrorStringWithFormat("invalid host file descriptor %" PRIu64, fd);
52 FileSP file_sp = pos->second;
54 error.SetErrorString("invalid host backing file");
57 error = file_sp->Close();
59 return error.Success();
62 uint64_t FileCache::WriteFile(lldb::user_id_t fd, uint64_t offset,
63 const void *src, uint64_t src_len,
65 if (fd == UINT64_MAX) {
66 error.SetErrorString("invalid file descriptor");
69 FDToFileMap::iterator pos = m_cache.find(fd);
70 if (pos == m_cache.end()) {
71 error.SetErrorStringWithFormat("invalid host file descriptor %" PRIu64, fd);
74 FileSP file_sp = pos->second;
76 error.SetErrorString("invalid host backing file");
79 if (static_cast<uint64_t>(file_sp->SeekFromStart(offset, &error)) != offset ||
82 size_t bytes_written = src_len;
83 error = file_sp->Write(src, bytes_written);
89 uint64_t FileCache::ReadFile(lldb::user_id_t fd, uint64_t offset, void *dst,
90 uint64_t dst_len, Status &error) {
91 if (fd == UINT64_MAX) {
92 error.SetErrorString("invalid file descriptor");
95 FDToFileMap::iterator pos = m_cache.find(fd);
96 if (pos == m_cache.end()) {
97 error.SetErrorStringWithFormat("invalid host file descriptor %" PRIu64, fd);
100 FileSP file_sp = pos->second;
102 error.SetErrorString("invalid host backing file");
105 if (static_cast<uint64_t>(file_sp->SeekFromStart(offset, &error)) != offset ||
108 size_t bytes_read = dst_len;
109 error = file_sp->Read(dst, bytes_read);