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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "content/browser/renderer_host/render_sandbox_host_linux.h" | 5 #include "content/browser/renderer_host/render_sandbox_host_linux.h" |
| 6 | 6 |
| 7 #include <fcntl.h> | |
| 8 #include <fontconfig/fontconfig.h> | |
| 9 #include <stdint.h> | |
| 10 #include <sys/poll.h> | |
| 11 #include <sys/socket.h> | 7 #include <sys/socket.h> |
| 12 #include <sys/stat.h> | |
| 13 #include <sys/uio.h> | |
| 14 #include <time.h> | |
| 15 #include <unistd.h> | |
| 16 | 8 |
| 17 #include <vector> | |
| 18 | |
| 19 #include "base/command_line.h" | |
| 20 #include "base/linux_util.h" | |
| 21 #include "base/memory/scoped_ptr.h" | |
| 22 #include "base/memory/shared_memory.h" | |
| 23 #include "base/memory/singleton.h" | 9 #include "base/memory/singleton.h" |
| 24 #include "base/pickle.h" | |
| 25 #include "base/posix/eintr_wrapper.h" | 10 #include "base/posix/eintr_wrapper.h" |
| 26 #include "base/posix/unix_domain_socket_linux.h" | 11 #include "content/browser/renderer_host/sandbox_ipc_linux.h" |
| 27 #include "base/process/launch.h" | |
| 28 #include "base/process/process_metrics.h" | |
| 29 #include "base/strings/string_number_conversions.h" | |
| 30 #include "base/strings/string_util.h" | |
| 31 #include "content/child/blink_platform_impl.h" | |
| 32 #include "content/common/font_config_ipc_linux.h" | |
| 33 #include "content/common/sandbox_linux/sandbox_linux.h" | |
| 34 #include "content/common/set_process_title.h" | |
| 35 #include "content/public/common/content_switches.h" | |
| 36 #include "ppapi/c/trusted/ppb_browser_font_trusted.h" | |
| 37 #include "skia/ext/skia_utils_base.h" | |
| 38 #include "third_party/WebKit/public/platform/linux/WebFontInfo.h" | |
| 39 #include "third_party/WebKit/public/web/WebKit.h" | |
| 40 #include "third_party/npapi/bindings/npapi_extensions.h" | |
| 41 #include "third_party/skia/include/ports/SkFontConfigInterface.h" | |
| 42 #include "ui/gfx/font_render_params_linux.h" | |
| 43 | |
| 44 using blink::WebCString; | |
| 45 using blink::WebFontInfo; | |
| 46 using blink::WebUChar; | |
| 47 using blink::WebUChar32; | |
| 48 | 12 |
| 49 namespace content { | 13 namespace content { |
| 50 | 14 |
| 51 // http://code.google.com/p/chromium/wiki/LinuxSandboxIPC | |
| 52 | |
| 53 // BEWARE: code in this file run across *processes* (not just threads). | |
| 54 | |
| 55 // This code runs in a child process | |
| 56 class SandboxIPCProcess { | |
| 57 public: | |
| 58 // lifeline_fd: this is the read end of a pipe which the browser process | |
| 59 // holds the other end of. If the browser process dies, its descriptors are | |
| 60 // closed and we will noticed an EOF on the pipe. That's our signal to exit. | |
| 61 // browser_socket: the browser's end of the sandbox IPC socketpair. From the | |
| 62 // point of view of the renderer, it's talking to the browser but this | |
| 63 // object actually services the requests. | |
| 64 // sandbox_cmd: the path of the sandbox executable. | |
| 65 SandboxIPCProcess(int lifeline_fd, int browser_socket, | |
| 66 std::string sandbox_cmd) | |
| 67 : lifeline_fd_(lifeline_fd), | |
| 68 browser_socket_(browser_socket) { | |
| 69 if (!sandbox_cmd.empty()) { | |
| 70 sandbox_cmd_.push_back(sandbox_cmd); | |
| 71 sandbox_cmd_.push_back(base::kFindInodeSwitch); | |
| 72 } | |
| 73 | |
| 74 // FontConfig doesn't provide a standard property to control subpixel | |
| 75 // positioning, so we pass the current setting through to WebKit. | |
| 76 WebFontInfo::setSubpixelPositioning( | |
| 77 gfx::GetDefaultWebkitSubpixelPositioning()); | |
| 78 | |
| 79 CommandLine& command_line = *CommandLine::ForCurrentProcess(); | |
| 80 command_line.AppendSwitchASCII(switches::kProcessType, | |
| 81 switches::kSandboxIPCProcess); | |
| 82 | |
| 83 // Update the process title. The argv was already cached by the call to | |
| 84 // SetProcessTitleFromCommandLine in content_main_runner.cc, so we can pass | |
| 85 // NULL here (we don't have the original argv at this point). | |
| 86 SetProcessTitleFromCommandLine(NULL); | |
| 87 } | |
| 88 | |
| 89 ~SandboxIPCProcess(); | |
| 90 | |
| 91 void Run() { | |
| 92 struct pollfd pfds[2]; | |
| 93 pfds[0].fd = lifeline_fd_; | |
| 94 pfds[0].events = POLLIN; | |
| 95 pfds[1].fd = browser_socket_; | |
| 96 pfds[1].events = POLLIN; | |
| 97 | |
| 98 int failed_polls = 0; | |
| 99 for (;;) { | |
| 100 const int r = HANDLE_EINTR(poll(pfds, 2, -1 /* no timeout */)); | |
| 101 // '0' is not a possible return value with no timeout. | |
| 102 DCHECK_NE(0, r); | |
| 103 if (r < 0) { | |
| 104 PLOG(WARNING) << "poll"; | |
| 105 if (failed_polls++ == 3) { | |
| 106 LOG(FATAL) << "poll(2) failing. RenderSandboxHostLinux aborting."; | |
| 107 return; | |
| 108 } | |
| 109 continue; | |
| 110 } | |
| 111 | |
| 112 failed_polls = 0; | |
| 113 | |
| 114 if (pfds[0].revents) { | |
| 115 // our parent died so we should too. | |
| 116 _exit(0); | |
| 117 } | |
| 118 | |
| 119 if (pfds[1].revents) { | |
| 120 HandleRequestFromRenderer(browser_socket_); | |
| 121 } | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 private: | |
| 126 void EnsureWebKitInitialized(); | |
| 127 | |
| 128 // --------------------------------------------------------------------------- | |
| 129 // Requests from the renderer... | |
| 130 | |
| 131 void HandleRequestFromRenderer(int fd) { | |
| 132 std::vector<int> fds; | |
| 133 | |
| 134 // A FontConfigIPC::METHOD_MATCH message could be kMaxFontFamilyLength | |
| 135 // bytes long (this is the largest message type). | |
| 136 // 128 bytes padding are necessary so recvmsg() does not return MSG_TRUNC | |
| 137 // error for a maximum length message. | |
| 138 char buf[FontConfigIPC::kMaxFontFamilyLength + 128]; | |
| 139 | |
| 140 const ssize_t len = UnixDomainSocket::RecvMsg(fd, buf, sizeof(buf), &fds); | |
| 141 if (len == -1) { | |
| 142 // TODO: should send an error reply, or the sender might block forever. | |
| 143 NOTREACHED() | |
| 144 << "Sandbox host message is larger than kMaxFontFamilyLength"; | |
| 145 return; | |
| 146 } | |
| 147 if (fds.empty()) | |
| 148 return; | |
| 149 | |
| 150 Pickle pickle(buf, len); | |
| 151 PickleIterator iter(pickle); | |
| 152 | |
| 153 int kind; | |
| 154 if (!pickle.ReadInt(&iter, &kind)) | |
| 155 goto error; | |
| 156 | |
| 157 if (kind == FontConfigIPC::METHOD_MATCH) { | |
| 158 HandleFontMatchRequest(fd, pickle, iter, fds); | |
| 159 } else if (kind == FontConfigIPC::METHOD_OPEN) { | |
| 160 HandleFontOpenRequest(fd, pickle, iter, fds); | |
| 161 } else if (kind == LinuxSandbox::METHOD_GET_FONT_FAMILY_FOR_CHAR) { | |
| 162 HandleGetFontFamilyForChar(fd, pickle, iter, fds); | |
| 163 } else if (kind == LinuxSandbox::METHOD_LOCALTIME) { | |
| 164 HandleLocaltime(fd, pickle, iter, fds); | |
| 165 } else if (kind == LinuxSandbox::METHOD_GET_CHILD_WITH_INODE) { | |
| 166 HandleGetChildWithInode(fd, pickle, iter, fds); | |
| 167 } else if (kind == LinuxSandbox::METHOD_GET_STYLE_FOR_STRIKE) { | |
| 168 HandleGetStyleForStrike(fd, pickle, iter, fds); | |
| 169 } else if (kind == LinuxSandbox::METHOD_MAKE_SHARED_MEMORY_SEGMENT) { | |
| 170 HandleMakeSharedMemorySegment(fd, pickle, iter, fds); | |
| 171 } else if (kind == LinuxSandbox::METHOD_MATCH_WITH_FALLBACK) { | |
| 172 HandleMatchWithFallback(fd, pickle, iter, fds); | |
| 173 } | |
| 174 | |
| 175 error: | |
| 176 for (std::vector<int>::const_iterator | |
| 177 i = fds.begin(); i != fds.end(); ++i) { | |
| 178 close(*i); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 int FindOrAddPath(const SkString& path) { | |
| 183 int count = paths_.count(); | |
| 184 for (int i = 0; i < count; ++i) { | |
| 185 if (path == *paths_[i]) | |
| 186 return i; | |
| 187 } | |
| 188 *paths_.append() = new SkString(path); | |
| 189 return count; | |
| 190 } | |
| 191 | |
| 192 void HandleFontMatchRequest(int fd, const Pickle& pickle, PickleIterator iter, | |
| 193 std::vector<int>& fds) { | |
| 194 uint32_t requested_style; | |
| 195 std::string family; | |
| 196 if (!pickle.ReadString(&iter, &family) || | |
| 197 !pickle.ReadUInt32(&iter, &requested_style)) | |
| 198 return; | |
| 199 | |
| 200 SkFontConfigInterface::FontIdentity result_identity; | |
| 201 SkString result_family; | |
| 202 SkTypeface::Style result_style; | |
| 203 SkFontConfigInterface* fc = | |
| 204 SkFontConfigInterface::GetSingletonDirectInterface(); | |
| 205 const bool r = fc->matchFamilyName( | |
| 206 family.c_str(), static_cast<SkTypeface::Style>(requested_style), | |
| 207 &result_identity, &result_family, &result_style); | |
| 208 | |
| 209 Pickle reply; | |
| 210 if (!r) { | |
| 211 reply.WriteBool(false); | |
| 212 } else { | |
| 213 // Stash away the returned path, so we can give it an ID (index) | |
| 214 // which will later be given to us in a request to open the file. | |
| 215 int index = FindOrAddPath(result_identity.fString); | |
| 216 result_identity.fID = static_cast<uint32_t>(index); | |
| 217 | |
| 218 reply.WriteBool(true); | |
| 219 skia::WriteSkString(&reply, result_family); | |
| 220 skia::WriteSkFontIdentity(&reply, result_identity); | |
| 221 reply.WriteUInt32(result_style); | |
| 222 } | |
| 223 SendRendererReply(fds, reply, -1); | |
| 224 } | |
| 225 | |
| 226 void HandleFontOpenRequest(int fd, const Pickle& pickle, PickleIterator iter, | |
| 227 std::vector<int>& fds) { | |
| 228 uint32_t index; | |
| 229 if (!pickle.ReadUInt32(&iter, &index)) | |
| 230 return; | |
| 231 if (index >= static_cast<uint32_t>(paths_.count())) | |
| 232 return; | |
| 233 const int result_fd = open(paths_[index]->c_str(), O_RDONLY); | |
| 234 | |
| 235 Pickle reply; | |
| 236 if (result_fd == -1) { | |
| 237 reply.WriteBool(false); | |
| 238 } else { | |
| 239 reply.WriteBool(true); | |
| 240 } | |
| 241 | |
| 242 // The receiver will have its own access to the file, so we will close it | |
| 243 // after this send. | |
| 244 SendRendererReply(fds, reply, result_fd); | |
| 245 | |
| 246 if (result_fd >= 0) { | |
| 247 int err = IGNORE_EINTR(close(result_fd)); | |
| 248 DCHECK(!err); | |
| 249 } | |
| 250 } | |
| 251 | |
| 252 void HandleGetFontFamilyForChar(int fd, const Pickle& pickle, | |
| 253 PickleIterator iter, | |
| 254 std::vector<int>& fds) { | |
| 255 // The other side of this call is | |
| 256 // chrome/renderer/renderer_sandbox_support_linux.cc | |
| 257 | |
| 258 EnsureWebKitInitialized(); | |
| 259 WebUChar32 c; | |
| 260 if (!pickle.ReadInt(&iter, &c)) | |
| 261 return; | |
| 262 | |
| 263 std::string preferred_locale; | |
| 264 if (!pickle.ReadString(&iter, &preferred_locale)) | |
| 265 return; | |
| 266 | |
| 267 blink::WebFontFamily family; | |
| 268 WebFontInfo::familyForChar(c, preferred_locale.c_str(), &family); | |
| 269 | |
| 270 Pickle reply; | |
| 271 if (family.name.data()) { | |
| 272 reply.WriteString(family.name.data()); | |
| 273 } else { | |
| 274 reply.WriteString(std::string()); | |
| 275 } | |
| 276 reply.WriteBool(family.isBold); | |
| 277 reply.WriteBool(family.isItalic); | |
| 278 SendRendererReply(fds, reply, -1); | |
| 279 } | |
| 280 | |
| 281 void HandleGetStyleForStrike(int fd, const Pickle& pickle, | |
| 282 PickleIterator iter, | |
| 283 std::vector<int>& fds) { | |
| 284 std::string family; | |
| 285 int sizeAndStyle; | |
| 286 | |
| 287 if (!pickle.ReadString(&iter, &family) || | |
| 288 !pickle.ReadInt(&iter, &sizeAndStyle)) { | |
| 289 return; | |
| 290 } | |
| 291 | |
| 292 EnsureWebKitInitialized(); | |
| 293 blink::WebFontRenderStyle style; | |
| 294 WebFontInfo::renderStyleForStrike(family.c_str(), sizeAndStyle, &style); | |
| 295 | |
| 296 Pickle reply; | |
| 297 reply.WriteInt(style.useBitmaps); | |
| 298 reply.WriteInt(style.useAutoHint); | |
| 299 reply.WriteInt(style.useHinting); | |
| 300 reply.WriteInt(style.hintStyle); | |
| 301 reply.WriteInt(style.useAntiAlias); | |
| 302 reply.WriteInt(style.useSubpixelRendering); | |
| 303 reply.WriteInt(style.useSubpixelPositioning); | |
| 304 | |
| 305 SendRendererReply(fds, reply, -1); | |
| 306 } | |
| 307 | |
| 308 void HandleLocaltime(int fd, const Pickle& pickle, PickleIterator iter, | |
| 309 std::vector<int>& fds) { | |
| 310 // The other side of this call is in zygote_main_linux.cc | |
| 311 | |
| 312 std::string time_string; | |
| 313 if (!pickle.ReadString(&iter, &time_string) || | |
| 314 time_string.size() != sizeof(time_t)) { | |
| 315 return; | |
| 316 } | |
| 317 | |
| 318 time_t time; | |
| 319 memcpy(&time, time_string.data(), sizeof(time)); | |
| 320 // We use localtime here because we need the tm_zone field to be filled | |
| 321 // out. Since we are a single-threaded process, this is safe. | |
| 322 const struct tm* expanded_time = localtime(&time); | |
| 323 | |
| 324 std::string result_string; | |
| 325 const char* time_zone_string = ""; | |
| 326 if (expanded_time != NULL) { | |
| 327 result_string = std::string(reinterpret_cast<const char*>(expanded_time), | |
| 328 sizeof(struct tm)); | |
| 329 time_zone_string = expanded_time->tm_zone; | |
| 330 } | |
| 331 | |
| 332 Pickle reply; | |
| 333 reply.WriteString(result_string); | |
| 334 reply.WriteString(time_zone_string); | |
| 335 SendRendererReply(fds, reply, -1); | |
| 336 } | |
| 337 | |
| 338 void HandleGetChildWithInode(int fd, const Pickle& pickle, | |
| 339 PickleIterator iter, | |
| 340 std::vector<int>& fds) { | |
| 341 // The other side of this call is in zygote_main_linux.cc | |
| 342 if (sandbox_cmd_.empty()) { | |
| 343 LOG(ERROR) << "Not in the sandbox, this should not be called"; | |
| 344 return; | |
| 345 } | |
| 346 | |
| 347 uint64_t inode; | |
| 348 if (!pickle.ReadUInt64(&iter, &inode)) | |
| 349 return; | |
| 350 | |
| 351 base::ProcessId pid = 0; | |
| 352 std::string inode_output; | |
| 353 | |
| 354 std::vector<std::string> sandbox_cmd = sandbox_cmd_; | |
| 355 sandbox_cmd.push_back(base::Int64ToString(inode)); | |
| 356 CommandLine get_inode_cmd(sandbox_cmd); | |
| 357 if (base::GetAppOutput(get_inode_cmd, &inode_output)) | |
| 358 base::StringToInt(inode_output, &pid); | |
| 359 | |
| 360 if (!pid) { | |
| 361 // Even though the pid is invalid, we still need to reply to the zygote | |
| 362 // and not just return here. | |
| 363 LOG(ERROR) << "Could not get pid"; | |
| 364 } | |
| 365 | |
| 366 Pickle reply; | |
| 367 reply.WriteInt(pid); | |
| 368 SendRendererReply(fds, reply, -1); | |
| 369 } | |
| 370 | |
| 371 void HandleMakeSharedMemorySegment(int fd, const Pickle& pickle, | |
| 372 PickleIterator iter, | |
| 373 std::vector<int>& fds) { | |
| 374 base::SharedMemoryCreateOptions options; | |
| 375 uint32_t size; | |
| 376 if (!pickle.ReadUInt32(&iter, &size)) | |
| 377 return; | |
| 378 options.size = size; | |
| 379 if (!pickle.ReadBool(&iter, &options.executable)) | |
| 380 return; | |
| 381 int shm_fd = -1; | |
| 382 base::SharedMemory shm; | |
| 383 if (shm.Create(options)) | |
| 384 shm_fd = shm.handle().fd; | |
| 385 Pickle reply; | |
| 386 SendRendererReply(fds, reply, shm_fd); | |
| 387 } | |
| 388 | |
| 389 void HandleMatchWithFallback(int fd, const Pickle& pickle, | |
| 390 PickleIterator iter, | |
| 391 std::vector<int>& fds) { | |
| 392 // Unlike the other calls, for which we are an indirection in front of | |
| 393 // WebKit or Skia, this call is always made via this sandbox helper | |
| 394 // process. Therefore the fontconfig code goes in here directly. | |
| 395 | |
| 396 std::string face; | |
| 397 bool is_bold, is_italic; | |
| 398 uint32 charset, fallback_family; | |
| 399 | |
| 400 if (!pickle.ReadString(&iter, &face) || | |
| 401 face.empty() || | |
| 402 !pickle.ReadBool(&iter, &is_bold) || | |
| 403 !pickle.ReadBool(&iter, &is_italic) || | |
| 404 !pickle.ReadUInt32(&iter, &charset) || | |
| 405 !pickle.ReadUInt32(&iter, &fallback_family)) { | |
| 406 return; | |
| 407 } | |
| 408 | |
| 409 FcLangSet* langset = FcLangSetCreate(); | |
| 410 bool is_lgc = MSCharSetToFontconfig(langset, charset); | |
| 411 | |
| 412 FcPattern* pattern = FcPatternCreate(); | |
| 413 FcPatternAddString(pattern, FC_FAMILY, | |
| 414 reinterpret_cast<const FcChar8*>(face.c_str())); | |
| 415 | |
| 416 // TODO(thestig) Check if we can access Chrome's per-script font preference | |
| 417 // here and select better default fonts for non-LGC case. | |
| 418 std::string generic_font_name; | |
| 419 if (is_lgc) { | |
| 420 switch (fallback_family) { | |
| 421 case PP_BROWSERFONT_TRUSTED_FAMILY_SERIF: | |
| 422 generic_font_name = "Times New Roman"; | |
| 423 break; | |
| 424 case PP_BROWSERFONT_TRUSTED_FAMILY_SANSSERIF: | |
| 425 generic_font_name = "Arial"; | |
| 426 break; | |
| 427 case PP_BROWSERFONT_TRUSTED_FAMILY_MONOSPACE: | |
| 428 generic_font_name = "Courier New"; | |
| 429 break; | |
| 430 } | |
| 431 } | |
| 432 if (!generic_font_name.empty()) { | |
| 433 const FcChar8* fc_generic_font_name = | |
| 434 reinterpret_cast<const FcChar8*>(generic_font_name.c_str()); | |
| 435 FcPatternAddString(pattern, FC_FAMILY, fc_generic_font_name); | |
| 436 } | |
| 437 | |
| 438 if (is_bold) | |
| 439 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD); | |
| 440 if (is_italic) | |
| 441 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC); | |
| 442 FcPatternAddLangSet(pattern, FC_LANG, langset); | |
| 443 FcPatternAddBool(pattern, FC_SCALABLE, FcTrue); | |
| 444 FcConfigSubstitute(NULL, pattern, FcMatchPattern); | |
| 445 FcDefaultSubstitute(pattern); | |
| 446 | |
| 447 FcResult result; | |
| 448 FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result); | |
| 449 int font_fd = -1; | |
| 450 int good_enough_index = -1; | |
| 451 bool good_enough_index_set = false; | |
| 452 | |
| 453 if (font_set) { | |
| 454 for (int i = 0; i < font_set->nfont; ++i) { | |
| 455 FcPattern* current = font_set->fonts[i]; | |
| 456 | |
| 457 // Older versions of fontconfig have a bug where they cannot select | |
| 458 // only scalable fonts so we have to manually filter the results. | |
| 459 FcBool is_scalable; | |
| 460 if (FcPatternGetBool(current, FC_SCALABLE, 0, | |
| 461 &is_scalable) != FcResultMatch || | |
| 462 !is_scalable) { | |
| 463 continue; | |
| 464 } | |
| 465 | |
| 466 FcChar8* c_filename; | |
| 467 if (FcPatternGetString(current, FC_FILE, 0, &c_filename) != | |
| 468 FcResultMatch) { | |
| 469 continue; | |
| 470 } | |
| 471 | |
| 472 // We only want to return sfnt (TrueType) based fonts. We don't have a | |
| 473 // very good way of detecting this so we'll filter based on the | |
| 474 // filename. | |
| 475 bool is_sfnt = false; | |
| 476 static const char kSFNTExtensions[][5] = { | |
| 477 ".ttf", ".otc", ".TTF", ".ttc", "" | |
| 478 }; | |
| 479 const size_t filename_len = strlen(reinterpret_cast<char*>(c_filename)); | |
| 480 for (unsigned j = 0; ; j++) { | |
| 481 if (kSFNTExtensions[j][0] == 0) { | |
| 482 // None of the extensions matched. | |
| 483 break; | |
| 484 } | |
| 485 const size_t ext_len = strlen(kSFNTExtensions[j]); | |
| 486 if (filename_len > ext_len && | |
| 487 memcmp(c_filename + filename_len - ext_len, | |
| 488 kSFNTExtensions[j], ext_len) == 0) { | |
| 489 is_sfnt = true; | |
| 490 break; | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 if (!is_sfnt) | |
| 495 continue; | |
| 496 | |
| 497 // This font is good enough to pass muster, but we might be able to do | |
| 498 // better with subsequent ones. | |
| 499 if (!good_enough_index_set) { | |
| 500 good_enough_index = i; | |
| 501 good_enough_index_set = true; | |
| 502 } | |
| 503 | |
| 504 FcValue matrix; | |
| 505 bool have_matrix = FcPatternGet(current, FC_MATRIX, 0, &matrix) == 0; | |
| 506 | |
| 507 if (is_italic && have_matrix) { | |
| 508 // we asked for an italic font, but fontconfig is giving us a | |
| 509 // non-italic font with a transformation matrix. | |
| 510 continue; | |
| 511 } | |
| 512 | |
| 513 FcValue embolden; | |
| 514 const bool have_embolden = | |
| 515 FcPatternGet(current, FC_EMBOLDEN, 0, &embolden) == 0; | |
| 516 | |
| 517 if (is_bold && have_embolden) { | |
| 518 // we asked for a bold font, but fontconfig gave us a non-bold font | |
| 519 // and asked us to apply fake bolding. | |
| 520 continue; | |
| 521 } | |
| 522 | |
| 523 font_fd = open(reinterpret_cast<char*>(c_filename), O_RDONLY); | |
| 524 if (font_fd >= 0) | |
| 525 break; | |
| 526 } | |
| 527 } | |
| 528 | |
| 529 if (font_fd == -1 && good_enough_index_set) { | |
| 530 // We didn't find a font that we liked, so we fallback to something | |
| 531 // acceptable. | |
| 532 FcPattern* current = font_set->fonts[good_enough_index]; | |
| 533 FcChar8* c_filename; | |
| 534 FcPatternGetString(current, FC_FILE, 0, &c_filename); | |
| 535 font_fd = open(reinterpret_cast<char*>(c_filename), O_RDONLY); | |
| 536 } | |
| 537 | |
| 538 if (font_set) | |
| 539 FcFontSetDestroy(font_set); | |
| 540 FcPatternDestroy(pattern); | |
| 541 | |
| 542 Pickle reply; | |
| 543 SendRendererReply(fds, reply, font_fd); | |
| 544 | |
| 545 if (font_fd >= 0) { | |
| 546 if (IGNORE_EINTR(close(font_fd)) < 0) | |
| 547 PLOG(ERROR) << "close"; | |
| 548 } | |
| 549 } | |
| 550 | |
| 551 // MSCharSetToFontconfig translates a Microsoft charset identifier to a | |
| 552 // fontconfig language set by appending to |langset|. | |
| 553 // Returns true if |langset| is Latin/Greek/Cyrillic. | |
| 554 static bool MSCharSetToFontconfig(FcLangSet* langset, unsigned fdwCharSet) { | |
| 555 // We have need to translate raw fdwCharSet values into terms that | |
| 556 // fontconfig can understand. (See the description of fdwCharSet in the MSDN | |
| 557 // documentation for CreateFont: | |
| 558 // http://msdn.microsoft.com/en-us/library/dd183499(VS.85).aspx ) | |
| 559 // | |
| 560 // Although the argument is /called/ 'charset', the actual values conflate | |
| 561 // character sets (which are sets of Unicode code points) and character | |
| 562 // encodings (which are algorithms for turning a series of bits into a | |
| 563 // series of code points.) Sometimes the values will name a language, | |
| 564 // sometimes they'll name an encoding. In the latter case I'm assuming that | |
| 565 // they mean the set of code points in the domain of that encoding. | |
| 566 // | |
| 567 // fontconfig deals with ISO 639-1 language codes: | |
| 568 // http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes | |
| 569 // | |
| 570 // So, for each of the documented fdwCharSet values I've had to take a | |
| 571 // guess at the set of ISO 639-1 languages intended. | |
| 572 | |
| 573 bool is_lgc = false; | |
| 574 switch (fdwCharSet) { | |
| 575 case NPCharsetAnsi: | |
| 576 // These values I don't really know what to do with, so I'm going to map | |
| 577 // them to English also. | |
| 578 case NPCharsetDefault: | |
| 579 case NPCharsetMac: | |
| 580 case NPCharsetOEM: | |
| 581 case NPCharsetSymbol: | |
| 582 is_lgc = true; | |
| 583 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("en")); | |
| 584 break; | |
| 585 case NPCharsetBaltic: | |
| 586 // The three baltic languages. | |
| 587 is_lgc = true; | |
| 588 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("et")); | |
| 589 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("lv")); | |
| 590 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("lt")); | |
| 591 break; | |
| 592 case NPCharsetChineseBIG5: | |
| 593 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("zh-tw")); | |
| 594 break; | |
| 595 case NPCharsetGB2312: | |
| 596 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("zh-cn")); | |
| 597 break; | |
| 598 case NPCharsetEastEurope: | |
| 599 // A scattering of eastern European languages. | |
| 600 is_lgc = true; | |
| 601 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("pl")); | |
| 602 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("cs")); | |
| 603 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("sk")); | |
| 604 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("hu")); | |
| 605 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("hr")); | |
| 606 break; | |
| 607 case NPCharsetGreek: | |
| 608 is_lgc = true; | |
| 609 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("el")); | |
| 610 break; | |
| 611 case NPCharsetHangul: | |
| 612 case NPCharsetJohab: | |
| 613 // Korean | |
| 614 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ko")); | |
| 615 break; | |
| 616 case NPCharsetRussian: | |
| 617 is_lgc = true; | |
| 618 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ru")); | |
| 619 break; | |
| 620 case NPCharsetShiftJIS: | |
| 621 // Japanese | |
| 622 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ja")); | |
| 623 break; | |
| 624 case NPCharsetTurkish: | |
| 625 is_lgc = true; | |
| 626 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("tr")); | |
| 627 break; | |
| 628 case NPCharsetVietnamese: | |
| 629 is_lgc = true; | |
| 630 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("vi")); | |
| 631 break; | |
| 632 case NPCharsetArabic: | |
| 633 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ar")); | |
| 634 break; | |
| 635 case NPCharsetHebrew: | |
| 636 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("he")); | |
| 637 break; | |
| 638 case NPCharsetThai: | |
| 639 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("th")); | |
| 640 break; | |
| 641 // default: | |
| 642 // Don't add any languages in that case that we don't recognise the | |
| 643 // constant. | |
| 644 } | |
| 645 return is_lgc; | |
| 646 } | |
| 647 | |
| 648 void SendRendererReply(const std::vector<int>& fds, const Pickle& reply, | |
| 649 int reply_fd) { | |
| 650 struct msghdr msg; | |
| 651 memset(&msg, 0, sizeof(msg)); | |
| 652 struct iovec iov = {const_cast<void*>(reply.data()), reply.size()}; | |
| 653 msg.msg_iov = &iov; | |
| 654 msg.msg_iovlen = 1; | |
| 655 | |
| 656 char control_buffer[CMSG_SPACE(sizeof(int))]; | |
| 657 | |
| 658 if (reply_fd != -1) { | |
| 659 struct stat st; | |
| 660 if (fstat(reply_fd, &st) == 0 && S_ISDIR(st.st_mode)) { | |
| 661 LOG(FATAL) << "Tried to send a directory descriptor over sandbox IPC"; | |
| 662 // We must never send directory descriptors to a sandboxed process | |
| 663 // because they can use openat with ".." elements in the path in order | |
| 664 // to escape the sandbox and reach the real filesystem. | |
| 665 } | |
| 666 | |
| 667 struct cmsghdr *cmsg; | |
| 668 msg.msg_control = control_buffer; | |
| 669 msg.msg_controllen = sizeof(control_buffer); | |
| 670 cmsg = CMSG_FIRSTHDR(&msg); | |
| 671 cmsg->cmsg_level = SOL_SOCKET; | |
| 672 cmsg->cmsg_type = SCM_RIGHTS; | |
| 673 cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
| 674 memcpy(CMSG_DATA(cmsg), &reply_fd, sizeof(reply_fd)); | |
| 675 msg.msg_controllen = cmsg->cmsg_len; | |
| 676 } | |
| 677 | |
| 678 if (HANDLE_EINTR(sendmsg(fds[0], &msg, MSG_DONTWAIT)) < 0) | |
| 679 PLOG(ERROR) << "sendmsg"; | |
| 680 } | |
| 681 | |
| 682 // --------------------------------------------------------------------------- | |
| 683 | |
| 684 const int lifeline_fd_; | |
| 685 const int browser_socket_; | |
| 686 std::vector<std::string> sandbox_cmd_; | |
| 687 scoped_ptr<BlinkPlatformImpl> webkit_platform_support_; | |
| 688 SkTDArray<SkString*> paths_; | |
| 689 }; | |
| 690 | |
| 691 SandboxIPCProcess::~SandboxIPCProcess() { | |
| 692 paths_.deleteAll(); | |
| 693 if (webkit_platform_support_) | |
| 694 blink::shutdownWithoutV8(); | |
| 695 } | |
| 696 | |
| 697 void SandboxIPCProcess::EnsureWebKitInitialized() { | |
| 698 if (webkit_platform_support_) | |
| 699 return; | |
| 700 webkit_platform_support_.reset(new BlinkPlatformImpl); | |
| 701 blink::initializeWithoutV8(webkit_platform_support_.get()); | |
| 702 } | |
| 703 | |
| 704 // ----------------------------------------------------------------------------- | |
| 705 | |
| 706 // Runs on the main thread at startup. | 15 // Runs on the main thread at startup. |
| 707 RenderSandboxHostLinux::RenderSandboxHostLinux() | 16 RenderSandboxHostLinux::RenderSandboxHostLinux() |
| 708 : initialized_(false), | 17 : initialized_(false), |
| 709 renderer_socket_(0), | 18 renderer_socket_(0), |
| 710 childs_lifeline_fd_(0), | 19 childs_lifeline_fd_(0), |
| 711 pid_(0) { | 20 pid_(0) { |
| 712 } | 21 } |
| 713 | 22 |
| 714 // static | 23 // static |
| 715 RenderSandboxHostLinux* RenderSandboxHostLinux::GetInstance() { | 24 RenderSandboxHostLinux* RenderSandboxHostLinux::GetInstance() { |
| (...skipping 48 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 764 RenderSandboxHostLinux::~RenderSandboxHostLinux() { | 73 RenderSandboxHostLinux::~RenderSandboxHostLinux() { |
| 765 if (initialized_) { | 74 if (initialized_) { |
| 766 if (IGNORE_EINTR(close(renderer_socket_)) < 0) | 75 if (IGNORE_EINTR(close(renderer_socket_)) < 0) |
| 767 PLOG(ERROR) << "close"; | 76 PLOG(ERROR) << "close"; |
| 768 if (IGNORE_EINTR(close(childs_lifeline_fd_)) < 0) | 77 if (IGNORE_EINTR(close(childs_lifeline_fd_)) < 0) |
| 769 PLOG(ERROR) << "close"; | 78 PLOG(ERROR) << "close"; |
| 770 } | 79 } |
| 771 } | 80 } |
| 772 | 81 |
| 773 } // namespace content | 82 } // namespace content |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 240563002:
Extract SandboxIPCProcess into its own file. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src