808142876c
Summary: A *.cpp file header in LLDB (and in LLDB) should like this: ``` //===-- TestUtilities.cpp -------------------------------------------------===// ``` However in LLDB most of our source files have arbitrary changes to this format and these changes are spreading through LLDB as folks usually just use the existing source files as templates for their new files (most notably the unnecessary editor language indicator `-*- C++ -*-` is spreading and in every review someone is pointing out that this is wrong, resulting in people pointing out that this is done in the same way in other files). This patch removes most of these inconsistencies including the editor language indicators, all the different missing/additional '-' characters, files that center the file name, missing trailing `===//` (mostly caused by clang-format breaking the line). Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere Reviewed By: JDevlieghere Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D73258
115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
//===-- FileCache.cpp -----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/FileCache.h"
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#include "lldb/Host/File.h"
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#include "lldb/Host/FileSystem.h"
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using namespace lldb;
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using namespace lldb_private;
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FileCache *FileCache::m_instance = nullptr;
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FileCache &FileCache::GetInstance() {
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if (m_instance == nullptr)
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m_instance = new FileCache();
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return *m_instance;
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}
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lldb::user_id_t FileCache::OpenFile(const FileSpec &file_spec,
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File::OpenOptions flags, uint32_t mode,
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Status &error) {
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if (!file_spec) {
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error.SetErrorString("empty path");
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return UINT64_MAX;
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}
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auto file = FileSystem::Instance().Open(file_spec, flags, mode);
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if (!file) {
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error = file.takeError();
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return UINT64_MAX;
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}
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lldb::user_id_t fd = file.get()->GetDescriptor();
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m_cache[fd] = std::move(file.get());
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return fd;
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}
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bool FileCache::CloseFile(lldb::user_id_t fd, Status &error) {
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if (fd == UINT64_MAX) {
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error.SetErrorString("invalid file descriptor");
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return false;
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}
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FDToFileMap::iterator pos = m_cache.find(fd);
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if (pos == m_cache.end()) {
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error.SetErrorStringWithFormat("invalid host file descriptor %" PRIu64, fd);
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return false;
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}
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FileUP &file_up = pos->second;
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if (!file_up) {
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error.SetErrorString("invalid host backing file");
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return false;
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}
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error = file_up->Close();
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m_cache.erase(pos);
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return error.Success();
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}
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uint64_t FileCache::WriteFile(lldb::user_id_t fd, uint64_t offset,
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const void *src, uint64_t src_len,
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Status &error) {
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if (fd == UINT64_MAX) {
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error.SetErrorString("invalid file descriptor");
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return UINT64_MAX;
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}
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FDToFileMap::iterator pos = m_cache.find(fd);
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if (pos == m_cache.end()) {
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error.SetErrorStringWithFormat("invalid host file descriptor %" PRIu64, fd);
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return false;
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}
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FileUP &file_up = pos->second;
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if (!file_up) {
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error.SetErrorString("invalid host backing file");
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return UINT64_MAX;
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}
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if (static_cast<uint64_t>(file_up->SeekFromStart(offset, &error)) != offset ||
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error.Fail())
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return UINT64_MAX;
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size_t bytes_written = src_len;
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error = file_up->Write(src, bytes_written);
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if (error.Fail())
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return UINT64_MAX;
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return bytes_written;
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}
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uint64_t FileCache::ReadFile(lldb::user_id_t fd, uint64_t offset, void *dst,
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uint64_t dst_len, Status &error) {
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if (fd == UINT64_MAX) {
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error.SetErrorString("invalid file descriptor");
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return UINT64_MAX;
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}
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FDToFileMap::iterator pos = m_cache.find(fd);
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if (pos == m_cache.end()) {
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error.SetErrorStringWithFormat("invalid host file descriptor %" PRIu64, fd);
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return false;
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}
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FileUP &file_up = pos->second;
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if (!file_up) {
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error.SetErrorString("invalid host backing file");
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return UINT64_MAX;
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}
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if (static_cast<uint64_t>(file_up->SeekFromStart(offset, &error)) != offset ||
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error.Fail())
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return UINT64_MAX;
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size_t bytes_read = dst_len;
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error = file_up->Read(dst, bytes_read);
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if (error.Fail())
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return UINT64_MAX;
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return bytes_read;
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}
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