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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/crash_handler_host_linux.h" | |
| 6 | |
| 7 #include <stdint.h> | |
| 8 #include <stdlib.h> | |
| 9 #include <sys/socket.h> | |
| 10 #include <sys/syscall.h> | |
| 11 #include <unistd.h> | |
| 12 | |
| 13 #include "base/bind.h" | |
| 14 #include "base/bind_helpers.h" | |
| 15 #include "base/eintr_wrapper.h" | |
| 16 #include "base/file_path.h" | |
| 17 #include "base/format_macros.h" | |
| 18 #include "base/linux_util.h" | |
| 19 #include "base/logging.h" | |
| 20 #include "base/memory/singleton.h" | |
| 21 #include "base/message_loop.h" | |
| 22 #include "base/path_service.h" | |
| 23 #include "base/rand_util.h" | |
| 24 #include "base/string_util.h" | |
| 25 #include "base/stringprintf.h" | |
| 26 #include "base/threading/thread.h" | |
| 27 #include "breakpad/src/client/linux/handler/exception_handler.h" | |
| 28 #include "breakpad/src/client/linux/minidump_writer/linux_dumper.h" | |
| 29 #include "breakpad/src/client/linux/minidump_writer/minidump_writer.h" | |
| 30 #include "chrome/app/breakpad_linux.h" | |
| 31 #include "chrome/common/chrome_paths.h" | |
| 32 #include "chrome/common/env_vars.h" | |
| 33 #include "content/public/browser/browser_thread.h" | |
| 34 | |
| 35 using content::BrowserThread; | |
| 36 using google_breakpad::ExceptionHandler; | |
| 37 | |
| 38 namespace { | |
| 39 | |
| 40 // The length of the control message: | |
| 41 const unsigned kControlMsgSize = | |
| 42 CMSG_SPACE(2*sizeof(int)) + CMSG_SPACE(sizeof(struct ucred)); | |
| 43 // The length of the regular payload: | |
| 44 const unsigned kCrashContextSize = sizeof(ExceptionHandler::CrashContext); | |
| 45 | |
| 46 // Handles the crash dump and frees the allocated BreakpadInfo struct. | |
| 47 void CrashDumpTask(CrashHandlerHostLinux* handler, BreakpadInfo* info) { | |
| 48 if (handler->IsShuttingDown()) | |
| 49 return; | |
| 50 | |
| 51 HandleCrashDump(*info); | |
| 52 delete[] info->filename; | |
| 53 delete[] info->process_type; | |
| 54 delete[] info->crash_url; | |
| 55 delete[] info->guid; | |
| 56 delete[] info->distro; | |
| 57 delete info; | |
| 58 } | |
| 59 | |
| 60 } // namespace | |
| 61 | |
| 62 // Since classes derived from CrashHandlerHostLinux are singletons, it's only | |
| 63 // destroyed at the end of the processes lifetime, which is greater in span than | |
| 64 // the lifetime of the IO message loop. Thus, all calls to base::Bind() use | |
| 65 // non-refcounted pointers. | |
| 66 | |
| 67 CrashHandlerHostLinux::CrashHandlerHostLinux() | |
| 68 : shutting_down_(false) { | |
| 69 int fds[2]; | |
| 70 // We use SOCK_SEQPACKET rather than SOCK_DGRAM to prevent the process from | |
| 71 // sending datagrams to other sockets on the system. The sandbox may prevent | |
| 72 // the process from calling socket() to create new sockets, but it'll still | |
| 73 // inherit some sockets. With PF_UNIX+SOCK_DGRAM, it can call sendmsg to send | |
| 74 // a datagram to any (abstract) socket on the same system. With | |
| 75 // SOCK_SEQPACKET, this is prevented. | |
| 76 CHECK_EQ(socketpair(AF_UNIX, SOCK_SEQPACKET, 0, fds), 0); | |
| 77 static const int on = 1; | |
| 78 | |
| 79 // Enable passcred on the server end of the socket | |
| 80 CHECK_EQ(setsockopt(fds[1], SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)), 0); | |
| 81 | |
| 82 process_socket_ = fds[0]; | |
| 83 browser_socket_ = fds[1]; | |
| 84 | |
| 85 BrowserThread::PostTask( | |
| 86 BrowserThread::IO, FROM_HERE, | |
| 87 base::Bind(&CrashHandlerHostLinux::Init, base::Unretained(this))); | |
| 88 } | |
| 89 | |
| 90 CrashHandlerHostLinux::~CrashHandlerHostLinux() { | |
| 91 HANDLE_EINTR(close(process_socket_)); | |
| 92 HANDLE_EINTR(close(browser_socket_)); | |
| 93 } | |
| 94 | |
| 95 void CrashHandlerHostLinux::Init() { | |
| 96 MessageLoopForIO* ml = MessageLoopForIO::current(); | |
| 97 CHECK(ml->WatchFileDescriptor( | |
| 98 browser_socket_, true /* persistent */, | |
| 99 MessageLoopForIO::WATCH_READ, | |
| 100 &file_descriptor_watcher_, this)); | |
| 101 ml->AddDestructionObserver(this); | |
| 102 } | |
| 103 | |
| 104 void CrashHandlerHostLinux::InitCrashUploaderThread() { | |
| 105 SetProcessType(); | |
| 106 uploader_thread_.reset( | |
| 107 new base::Thread(std::string(process_type_ + "_crash_uploader").c_str())); | |
| 108 uploader_thread_->Start(); | |
| 109 } | |
| 110 | |
| 111 void CrashHandlerHostLinux::OnFileCanWriteWithoutBlocking(int fd) { | |
| 112 DCHECK(false); | |
| 113 } | |
| 114 | |
| 115 void CrashHandlerHostLinux::OnFileCanReadWithoutBlocking(int fd) { | |
| 116 DCHECK_EQ(fd, browser_socket_); | |
| 117 | |
| 118 // A process has crashed and has signaled us by writing a datagram | |
| 119 // to the death signal socket. The datagram contains the crash context needed | |
| 120 // for writing the minidump as well as a file descriptor and a credentials | |
| 121 // block so that they can't lie about their pid. | |
| 122 | |
| 123 const size_t kIovSize = 7; | |
| 124 struct msghdr msg = {0}; | |
| 125 struct iovec iov[kIovSize]; | |
| 126 | |
| 127 // Freed in WriteDumpFile(); | |
| 128 char* crash_context = new char[kCrashContextSize]; | |
| 129 // Freed in CrashDumpTask(); | |
| 130 char* guid = new char[kGuidSize + 1]; | |
| 131 char* crash_url = new char[kMaxActiveURLSize + 1]; | |
| 132 char* distro = new char[kDistroSize + 1]; | |
| 133 | |
| 134 char* tid_buf_addr = NULL; | |
| 135 int tid_fd = -1; | |
| 136 uint64_t uptime; | |
| 137 char control[kControlMsgSize]; | |
| 138 const ssize_t expected_msg_size = | |
| 139 kCrashContextSize + | |
| 140 kGuidSize + 1 + | |
| 141 kMaxActiveURLSize + 1 + | |
| 142 kDistroSize + 1 + | |
| 143 sizeof(tid_buf_addr) + sizeof(tid_fd) + | |
| 144 sizeof(uptime); | |
| 145 | |
| 146 iov[0].iov_base = crash_context; | |
| 147 iov[0].iov_len = kCrashContextSize; | |
| 148 iov[1].iov_base = guid; | |
| 149 iov[1].iov_len = kGuidSize + 1; | |
| 150 iov[2].iov_base = crash_url; | |
| 151 iov[2].iov_len = kMaxActiveURLSize + 1; | |
| 152 iov[3].iov_base = distro; | |
| 153 iov[3].iov_len = kDistroSize + 1; | |
| 154 iov[4].iov_base = &tid_buf_addr; | |
| 155 iov[4].iov_len = sizeof(tid_buf_addr); | |
| 156 iov[5].iov_base = &tid_fd; | |
| 157 iov[5].iov_len = sizeof(tid_fd); | |
| 158 iov[6].iov_base = &uptime; | |
| 159 iov[6].iov_len = sizeof(uptime); | |
| 160 msg.msg_iov = iov; | |
| 161 msg.msg_iovlen = kIovSize; | |
| 162 msg.msg_control = control; | |
| 163 msg.msg_controllen = kControlMsgSize; | |
| 164 | |
| 165 const ssize_t msg_size = HANDLE_EINTR(recvmsg(browser_socket_, &msg, 0)); | |
| 166 if (msg_size != expected_msg_size) { | |
| 167 LOG(ERROR) << "Error reading from death signal socket. Crash dumping" | |
| 168 << " is disabled." | |
| 169 << " msg_size:" << msg_size | |
| 170 << " errno:" << errno; | |
| 171 file_descriptor_watcher_.StopWatchingFileDescriptor(); | |
| 172 return; | |
| 173 } | |
| 174 | |
| 175 if (msg.msg_controllen != kControlMsgSize || | |
| 176 msg.msg_flags & ~MSG_TRUNC) { | |
| 177 LOG(ERROR) << "Received death signal message with the wrong size;" | |
| 178 << " msg.msg_controllen:" << msg.msg_controllen | |
| 179 << " msg.msg_flags:" << msg.msg_flags | |
| 180 << " kCrashContextSize:" << kCrashContextSize | |
| 181 << " kControlMsgSize:" << kControlMsgSize; | |
| 182 return; | |
| 183 } | |
| 184 | |
| 185 // Walk the control payload an extract the file descriptor and validated pid. | |
| 186 pid_t crashing_pid = -1; | |
| 187 int partner_fd = -1; | |
| 188 int signal_fd = -1; | |
| 189 for (struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg); hdr; | |
| 190 hdr = CMSG_NXTHDR(&msg, hdr)) { | |
| 191 if (hdr->cmsg_level != SOL_SOCKET) | |
| 192 continue; | |
| 193 if (hdr->cmsg_type == SCM_RIGHTS) { | |
| 194 const unsigned len = hdr->cmsg_len - | |
| 195 (((uint8_t*)CMSG_DATA(hdr)) - (uint8_t*)hdr); | |
| 196 DCHECK_EQ(len % sizeof(int), 0u); | |
| 197 const unsigned num_fds = len / sizeof(int); | |
| 198 if (num_fds != 2) { | |
| 199 // A nasty process could try and send us too many descriptors and | |
| 200 // force a leak. | |
| 201 LOG(ERROR) << "Death signal contained wrong number of descriptors;" | |
| 202 << " num_fds:" << num_fds; | |
| 203 for (unsigned i = 0; i < num_fds; ++i) | |
| 204 HANDLE_EINTR(close(reinterpret_cast<int*>(CMSG_DATA(hdr))[i])); | |
| 205 return; | |
| 206 } else { | |
| 207 partner_fd = reinterpret_cast<int*>(CMSG_DATA(hdr))[0]; | |
| 208 signal_fd = reinterpret_cast<int*>(CMSG_DATA(hdr))[1]; | |
| 209 } | |
| 210 } else if (hdr->cmsg_type == SCM_CREDENTIALS) { | |
| 211 const struct ucred *cred = | |
| 212 reinterpret_cast<struct ucred*>(CMSG_DATA(hdr)); | |
| 213 crashing_pid = cred->pid; | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 if (crashing_pid == -1 || partner_fd == -1 || signal_fd == -1) { | |
| 218 LOG(ERROR) << "Death signal message didn't contain all expected control" | |
| 219 << " messages"; | |
| 220 if (partner_fd >= 0) | |
| 221 HANDLE_EINTR(close(partner_fd)); | |
| 222 if (signal_fd >= 0) | |
| 223 HANDLE_EINTR(close(signal_fd)); | |
| 224 return; | |
| 225 } | |
| 226 | |
| 227 // Kernel bug workaround (broken in 2.6.30 and 2.6.32, working in 2.6.38). | |
| 228 // The kernel doesn't translate PIDs in SCM_CREDENTIALS across PID | |
| 229 // namespaces. Thus |crashing_pid| might be garbage from our point of view. | |
| 230 // In the future we can remove this workaround, but we have to wait a couple | |
| 231 // of years to be sure that it's worked its way out into the world. | |
| 232 // TODO(thestig) Remove the workaround when Ubuntu Lucid is deprecated. | |
| 233 | |
| 234 // The crashing process closes its copy of the signal_fd immediately after | |
| 235 // calling sendmsg(). We can thus not reliably look for with with | |
| 236 // FindProcessHoldingSocket(). But by necessity, it has to keep the | |
| 237 // partner_fd open until the crashdump is complete. | |
| 238 uint64_t inode_number; | |
| 239 if (!base::FileDescriptorGetInode(&inode_number, partner_fd)) { | |
| 240 LOG(WARNING) << "Failed to get inode number for passed socket"; | |
| 241 HANDLE_EINTR(close(partner_fd)); | |
| 242 HANDLE_EINTR(close(signal_fd)); | |
| 243 return; | |
| 244 } | |
| 245 HANDLE_EINTR(close(partner_fd)); | |
| 246 | |
| 247 pid_t actual_crashing_pid = -1; | |
| 248 if (!base::FindProcessHoldingSocket(&actual_crashing_pid, inode_number)) { | |
| 249 LOG(WARNING) << "Failed to find process holding other end of crash reply " | |
| 250 "socket"; | |
| 251 HANDLE_EINTR(close(signal_fd)); | |
| 252 return; | |
| 253 } | |
| 254 | |
| 255 crashing_pid = actual_crashing_pid; | |
| 256 | |
| 257 // The crashing TID set inside the compromised context via | |
| 258 // sys_gettid() in ExceptionHandler::HandleSignal might be wrong (if | |
| 259 // the kernel supports PID namespacing) and may need to be | |
| 260 // translated. | |
| 261 // | |
| 262 // We expect the crashing thread to be in sys_read(), waiting for us to | |
| 263 // write to |signal_fd|. Most newer kernels where we have the different pid | |
| 264 // namespaces also have /proc/[pid]/syscall, so we can look through | |
| 265 // |actual_crashing_pid|'s thread group and find the thread that's in the | |
| 266 // read syscall with the right arguments. | |
| 267 | |
| 268 std::string expected_syscall_data; | |
| 269 // /proc/[pid]/syscall is formatted as follows: | |
| 270 // syscall_number arg1 ... arg6 sp pc | |
| 271 // but we just check syscall_number through arg3. | |
| 272 base::StringAppendF(&expected_syscall_data, "%d 0x%x %p 0x1 ", | |
| 273 SYS_read, tid_fd, tid_buf_addr); | |
| 274 bool syscall_supported = false; | |
| 275 pid_t crashing_tid = | |
| 276 base::FindThreadIDWithSyscall(crashing_pid, | |
| 277 expected_syscall_data, | |
| 278 &syscall_supported); | |
| 279 if (crashing_tid == -1) { | |
| 280 // We didn't find the thread we want. Maybe it didn't reach | |
| 281 // sys_read() yet or the thread went away. We'll just take a | |
| 282 // guess here and assume the crashing thread is the thread group | |
| 283 // leader. If procfs syscall is not supported by the kernel, then | |
| 284 // we assume the kernel also does not support TID namespacing and | |
| 285 // trust the TID passed by the crashing process. | |
| 286 LOG(WARNING) << "Could not translate tid - assuming crashing thread is " | |
| 287 "thread group leader; syscall_supported=" << syscall_supported; | |
| 288 crashing_tid = crashing_pid; | |
| 289 } | |
| 290 | |
| 291 ExceptionHandler::CrashContext* bad_context = | |
| 292 reinterpret_cast<ExceptionHandler::CrashContext*>(crash_context); | |
| 293 bad_context->tid = crashing_tid; | |
| 294 | |
| 295 // Sanitize the string data a bit more | |
| 296 guid[kGuidSize] = crash_url[kMaxActiveURLSize] = distro[kDistroSize] = 0; | |
| 297 | |
| 298 // Freed in CrashDumpTask(); | |
| 299 BreakpadInfo* info = new BreakpadInfo; | |
| 300 | |
| 301 info->process_type_length = process_type_.length(); | |
| 302 char* process_type_str = new char[info->process_type_length + 1]; | |
| 303 process_type_.copy(process_type_str, info->process_type_length); | |
| 304 process_type_str[info->process_type_length] = '\0'; | |
| 305 info->process_type = process_type_str; | |
| 306 | |
| 307 info->crash_url_length = strlen(crash_url); | |
| 308 info->crash_url = crash_url; | |
| 309 | |
| 310 info->guid_length = strlen(guid); | |
| 311 info->guid = guid; | |
| 312 | |
| 313 info->distro_length = strlen(distro); | |
| 314 info->distro = distro; | |
| 315 | |
| 316 info->upload = (getenv(env_vars::kHeadless) == NULL); | |
| 317 info->process_start_time = uptime; | |
| 318 | |
| 319 BrowserThread::PostTask( | |
| 320 BrowserThread::FILE, FROM_HERE, | |
| 321 base::Bind(&CrashHandlerHostLinux::WriteDumpFile, | |
| 322 base::Unretained(this), | |
| 323 info, | |
| 324 crashing_pid, | |
| 325 crash_context, | |
| 326 signal_fd)); | |
| 327 } | |
| 328 | |
| 329 void CrashHandlerHostLinux::WriteDumpFile(BreakpadInfo* info, | |
| 330 pid_t crashing_pid, | |
| 331 char* crash_context, | |
| 332 int signal_fd) { | |
| 333 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 334 | |
| 335 FilePath dumps_path("/tmp"); | |
| 336 PathService::Get(base::DIR_TEMP, &dumps_path); | |
| 337 if (!info->upload) | |
| 338 PathService::Get(chrome::DIR_CRASH_DUMPS, &dumps_path); | |
| 339 const uint64 rand = base::RandUint64(); | |
| 340 const std::string minidump_filename = | |
| 341 base::StringPrintf("%s/chromium-%s-minidump-%016" PRIx64 ".dmp", | |
| 342 dumps_path.value().c_str(), | |
| 343 process_type_.c_str(), | |
| 344 rand); | |
| 345 if (!google_breakpad::WriteMinidump(minidump_filename.c_str(), | |
| 346 crashing_pid, crash_context, | |
| 347 kCrashContextSize)) { | |
| 348 LOG(ERROR) << "Failed to write crash dump for pid " << crashing_pid; | |
| 349 } | |
| 350 delete[] crash_context; | |
| 351 | |
| 352 // Freed in CrashDumpTask(); | |
| 353 char* minidump_filename_str = new char[minidump_filename.length() + 1]; | |
| 354 minidump_filename.copy(minidump_filename_str, minidump_filename.length()); | |
| 355 minidump_filename_str[minidump_filename.length()] = '\0'; | |
| 356 info->filename = minidump_filename_str; | |
| 357 | |
| 358 BrowserThread::PostTask( | |
| 359 BrowserThread::IO, FROM_HERE, | |
| 360 base::Bind(&CrashHandlerHostLinux::QueueCrashDumpTask, | |
| 361 base::Unretained(this), | |
| 362 info, | |
| 363 signal_fd)); | |
| 364 } | |
| 365 | |
| 366 void CrashHandlerHostLinux::QueueCrashDumpTask(BreakpadInfo* info, | |
| 367 int signal_fd) { | |
| 368 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 369 | |
| 370 // Send the done signal to the process: it can exit now. | |
| 371 struct msghdr msg = {0}; | |
| 372 struct iovec done_iov; | |
| 373 done_iov.iov_base = const_cast<char*>("\x42"); | |
| 374 done_iov.iov_len = 1; | |
| 375 msg.msg_iov = &done_iov; | |
| 376 msg.msg_iovlen = 1; | |
| 377 | |
| 378 HANDLE_EINTR(sendmsg(signal_fd, &msg, MSG_DONTWAIT | MSG_NOSIGNAL)); | |
| 379 HANDLE_EINTR(close(signal_fd)); | |
| 380 | |
| 381 uploader_thread_->message_loop()->PostTask( | |
| 382 FROM_HERE, | |
| 383 base::Bind(&CrashDumpTask, base::Unretained(this), info)); | |
| 384 } | |
| 385 | |
| 386 void CrashHandlerHostLinux::WillDestroyCurrentMessageLoop() { | |
| 387 file_descriptor_watcher_.StopWatchingFileDescriptor(); | |
| 388 | |
| 389 // If we are quitting and there are crash dumps in the queue, turn them into | |
| 390 // no-ops. | |
| 391 shutting_down_ = true; | |
| 392 uploader_thread_->Stop(); | |
| 393 } | |
| 394 | |
| 395 bool CrashHandlerHostLinux::IsShuttingDown() const { | |
| 396 return shutting_down_; | |
| 397 } | |
| 398 | |
| 399 ExtensionCrashHandlerHostLinux::ExtensionCrashHandlerHostLinux() { | |
| 400 InitCrashUploaderThread(); | |
| 401 } | |
| 402 | |
| 403 ExtensionCrashHandlerHostLinux::~ExtensionCrashHandlerHostLinux() { | |
| 404 } | |
| 405 | |
| 406 void ExtensionCrashHandlerHostLinux::SetProcessType() { | |
| 407 process_type_ = "extension"; | |
| 408 } | |
| 409 | |
| 410 // static | |
| 411 ExtensionCrashHandlerHostLinux* ExtensionCrashHandlerHostLinux::GetInstance() { | |
| 412 return Singleton<ExtensionCrashHandlerHostLinux>::get(); | |
| 413 } | |
| 414 | |
| 415 GpuCrashHandlerHostLinux::GpuCrashHandlerHostLinux() { | |
| 416 InitCrashUploaderThread(); | |
| 417 } | |
| 418 | |
| 419 GpuCrashHandlerHostLinux::~GpuCrashHandlerHostLinux() { | |
| 420 } | |
| 421 | |
| 422 void GpuCrashHandlerHostLinux::SetProcessType() { | |
| 423 process_type_ = "gpu-process"; | |
| 424 } | |
| 425 | |
| 426 // static | |
| 427 GpuCrashHandlerHostLinux* GpuCrashHandlerHostLinux::GetInstance() { | |
| 428 return Singleton<GpuCrashHandlerHostLinux>::get(); | |
| 429 } | |
| 430 | |
| 431 PluginCrashHandlerHostLinux::PluginCrashHandlerHostLinux() { | |
| 432 InitCrashUploaderThread(); | |
| 433 } | |
| 434 | |
| 435 PluginCrashHandlerHostLinux::~PluginCrashHandlerHostLinux() { | |
| 436 } | |
| 437 | |
| 438 void PluginCrashHandlerHostLinux::SetProcessType() { | |
| 439 process_type_ = "plugin"; | |
| 440 } | |
| 441 | |
| 442 // static | |
| 443 PluginCrashHandlerHostLinux* PluginCrashHandlerHostLinux::GetInstance() { | |
| 444 return Singleton<PluginCrashHandlerHostLinux>::get(); | |
| 445 } | |
| 446 | |
| 447 PpapiCrashHandlerHostLinux::PpapiCrashHandlerHostLinux() { | |
| 448 InitCrashUploaderThread(); | |
| 449 } | |
| 450 | |
| 451 PpapiCrashHandlerHostLinux::~PpapiCrashHandlerHostLinux() { | |
| 452 } | |
| 453 | |
| 454 void PpapiCrashHandlerHostLinux::SetProcessType() { | |
| 455 process_type_ = "ppapi"; | |
| 456 } | |
| 457 | |
| 458 // static | |
| 459 PpapiCrashHandlerHostLinux* PpapiCrashHandlerHostLinux::GetInstance() { | |
| 460 return Singleton<PpapiCrashHandlerHostLinux>::get(); | |
| 461 } | |
| 462 | |
| 463 RendererCrashHandlerHostLinux::RendererCrashHandlerHostLinux() { | |
| 464 InitCrashUploaderThread(); | |
| 465 } | |
| 466 | |
| 467 RendererCrashHandlerHostLinux::~RendererCrashHandlerHostLinux() { | |
| 468 } | |
| 469 | |
| 470 void RendererCrashHandlerHostLinux::SetProcessType() { | |
| 471 process_type_ = "renderer"; | |
| 472 } | |
| 473 | |
| 474 // static | |
| 475 RendererCrashHandlerHostLinux* RendererCrashHandlerHostLinux::GetInstance() { | |
| 476 return Singleton<RendererCrashHandlerHostLinux>::get(); | |
| 477 } | |
| OLD | NEW |
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Chromium Code Reviews
Issue 9838033:
Upstream native crash handling changes for Android. (Closed)
Base URL: http://git.chromium.org/git/chromium.git@trunk