| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/common/font_config_ipc_linux.h" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/uio.h> |
| #include <unistd.h> |
| |
| #include "base/files/file_util.h" |
| #include "base/files/memory_mapped_file.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/pickle.h" |
| #include "base/posix/unix_domain_socket_linux.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "base/trace_event/trace_event.h" |
| #include "skia/ext/refptr.h" |
| #include "skia/ext/skia_utils_base.h" |
| #include "third_party/skia/include/core/SkData.h" |
| #include "third_party/skia/include/core/SkStream.h" |
| #include "third_party/skia/include/core/SkTypeface.h" |
| |
| namespace content { |
| |
| class FontConfigIPC::MappedFontFile |
| : public base::RefCountedThreadSafe<MappedFontFile> { |
| public: |
| explicit MappedFontFile(uint32_t font_id) : font_id_(font_id) {} |
| |
| uint32_t font_id() const { return font_id_; } |
| |
| bool Initialize(int fd) { |
| base::ThreadRestrictions::ScopedAllowIO allow_mmap; |
| return mapped_font_file_.Initialize(base::File(fd)); |
| } |
| |
| SkMemoryStream* CreateMemoryStream() { |
| DCHECK(mapped_font_file_.IsValid()); |
| auto data = skia::AdoptRef(SkData::NewWithProc( |
| mapped_font_file_.data(), mapped_font_file_.length(), |
| &MappedFontFile::ReleaseProc, this)); |
| if (!data) |
| return nullptr; |
| AddRef(); |
| return new SkMemoryStream(data.get()); |
| } |
| |
| private: |
| friend class base::RefCountedThreadSafe<MappedFontFile>; |
| |
| ~MappedFontFile() { |
| auto font_config = static_cast<FontConfigIPC*>(FontConfigIPC::RefGlobal()); |
| font_config->RemoveMappedFontFile(this); |
| } |
| |
| static void ReleaseProc(const void* ptr, size_t length, void* context) { |
| base::ThreadRestrictions::ScopedAllowIO allow_munmap; |
| static_cast<MappedFontFile*>(context)->Release(); |
| } |
| |
| uint32_t font_id_; |
| base::MemoryMappedFile mapped_font_file_; |
| }; |
| |
| void CloseFD(int fd) { |
| int err = IGNORE_EINTR(close(fd)); |
| DCHECK(!err); |
| } |
| |
| FontConfigIPC::FontConfigIPC(int fd) |
| : fd_(fd) { |
| } |
| |
| FontConfigIPC::~FontConfigIPC() { |
| CloseFD(fd_); |
| } |
| |
| bool FontConfigIPC::matchFamilyName(const char familyName[], |
| SkTypeface::Style requestedStyle, |
| FontIdentity* outFontIdentity, |
| SkString* outFamilyName, |
| SkTypeface::Style* outStyle) { |
| TRACE_EVENT0("sandbox_ipc", "FontConfigIPC::matchFamilyName"); |
| size_t familyNameLen = familyName ? strlen(familyName) : 0; |
| if (familyNameLen > kMaxFontFamilyLength) |
| return false; |
| |
| Pickle request; |
| request.WriteInt(METHOD_MATCH); |
| request.WriteData(familyName, familyNameLen); |
| request.WriteUInt32(requestedStyle); |
| |
| uint8_t reply_buf[2048]; |
| const ssize_t r = UnixDomainSocket::SendRecvMsg(fd_, reply_buf, |
| sizeof(reply_buf), NULL, |
| request); |
| if (r == -1) |
| return false; |
| |
| Pickle reply(reinterpret_cast<char*>(reply_buf), r); |
| PickleIterator iter(reply); |
| bool result; |
| if (!iter.ReadBool(&result)) |
| return false; |
| if (!result) |
| return false; |
| |
| SkString reply_family; |
| FontIdentity reply_identity; |
| uint32_t reply_style; |
| if (!skia::ReadSkString(&iter, &reply_family) || |
| !skia::ReadSkFontIdentity(&iter, &reply_identity) || |
| !iter.ReadUInt32(&reply_style)) { |
| return false; |
| } |
| |
| if (outFontIdentity) |
| *outFontIdentity = reply_identity; |
| if (outFamilyName) |
| *outFamilyName = reply_family; |
| if (outStyle) |
| *outStyle = static_cast<SkTypeface::Style>(reply_style); |
| |
| return true; |
| } |
| |
| SkStreamAsset* FontConfigIPC::openStream(const FontIdentity& identity) { |
| TRACE_EVENT0("sandbox_ipc", "FontConfigIPC::openStream"); |
| |
| { |
| base::AutoLock lock(lock_); |
| auto mapped_font_files_it = mapped_font_files_.find(identity.fID); |
| if (mapped_font_files_it != mapped_font_files_.end()) |
| return mapped_font_files_it->second->CreateMemoryStream(); |
| } |
| |
| Pickle request; |
| request.WriteInt(METHOD_OPEN); |
| request.WriteUInt32(identity.fID); |
| |
| int result_fd = -1; |
| uint8_t reply_buf[256]; |
| const ssize_t r = UnixDomainSocket::SendRecvMsg(fd_, reply_buf, |
| sizeof(reply_buf), |
| &result_fd, request); |
| |
| if (r == -1) |
| return NULL; |
| |
| Pickle reply(reinterpret_cast<char*>(reply_buf), r); |
| bool result; |
| PickleIterator iter(reply); |
| if (!iter.ReadBool(&result) || !result) { |
| if (result_fd) |
| CloseFD(result_fd); |
| return NULL; |
| } |
| |
| scoped_refptr<MappedFontFile> mapped_font_file = |
| new MappedFontFile(identity.fID); |
| if (!mapped_font_file->Initialize(result_fd)) |
| return nullptr; |
| |
| { |
| base::AutoLock lock(lock_); |
| auto mapped_font_files_it = |
| mapped_font_files_.insert(std::make_pair(mapped_font_file->font_id(), |
| mapped_font_file.get())).first; |
| return mapped_font_files_it->second->CreateMemoryStream(); |
| } |
| } |
| |
| void FontConfigIPC::RemoveMappedFontFile(MappedFontFile* mapped_font_file) { |
| base::AutoLock lock(lock_); |
| mapped_font_files_.erase(mapped_font_file->font_id()); |
| } |
| |
| } // namespace content |
| |