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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // For linux_syscall_support.h. This makes it safe to call embedded system | |
| 6 // calls when in seccomp mode. | |
| 7 #define SYS_SYSCALL_ENTRYPOINT "playground$syscallEntryPoint" | |
| 8 | |
| 9 #include "chrome/app/breakpad_linuxish.h" | |
| 10 | |
| 11 #include <fcntl.h> | |
| 12 #include <poll.h> | |
| 13 #include <stdlib.h> | |
| 14 #include <sys/socket.h> | |
| 15 #include <sys/time.h> | |
| 16 #include <sys/types.h> | |
| 17 #include <sys/wait.h> | |
| 18 #include <sys/uio.h> | |
| 19 #include <time.h> | |
| 20 #include <unistd.h> | |
| 21 | |
| 22 #include <algorithm> | |
| 23 #include <string> | |
| 24 | |
| 25 #include "base/command_line.h" | |
| 26 #include "base/eintr_wrapper.h" | |
| 27 #include "base/file_path.h" | |
| 28 #include "base/global_descriptors_posix.h" | |
| 29 #include "base/linux_util.h" | |
| 30 #include "base/path_service.h" | |
| 31 #include "base/process_util.h" | |
| 32 #include "base/string_util.h" | |
| 33 #include "breakpad/src/client/linux/handler/exception_handler.h" | |
| 34 #include "breakpad/src/client/linux/minidump_writer/directory_reader.h" | |
| 35 #include "breakpad/src/common/linux/linux_libc_support.h" | |
| 36 #include "breakpad/src/common/memory.h" | |
| 37 #include "chrome/browser/crash_upload_list.h" | |
| 38 #include "chrome/common/child_process_logging.h" | |
| 39 #include "chrome/common/chrome_paths.h" | |
| 40 #include "chrome/common/chrome_switches.h" | |
| 41 #include "chrome/common/chrome_version_info_posix.h" | |
| 42 #include "chrome/common/env_vars.h" | |
| 43 #include "chrome/common/logging_chrome.h" | |
| 44 #include "content/common/chrome_descriptors.h" | |
| 45 | |
| 46 #if defined(OS_ANDROID) | |
| 47 #include <android/log.h> | |
| 48 #include <sys/stat.h> | |
| 49 #include "base/android/path_utils.h" | |
| 50 #include "base/android/build_info.h" | |
| 51 #include "third_party/lss/linux_syscall_support.h" | |
| 52 #else | |
| 53 #include "seccompsandbox/linux_syscall_support.h" | |
| 54 #endif | |
| 55 | |
| 56 #ifndef PR_SET_PTRACER | |
| 57 #define PR_SET_PTRACER 0x59616d61 | |
| 58 #endif | |
| 59 | |
| 60 // Some versions of gcc are prone to warn about unused return values. In cases | |
| 61 // where we either a) know the call cannot fail, or b) there is nothing we | |
| 62 // can do when a call fails, we mark the return code as ignored. This avoids | |
| 63 // spurious compiler warnings. | |
| 64 #define IGNORE_RET(x) do { if (x); } while (0) | |
| 65 | |
| 66 static const char kUploadURL[] = | |
| 67 "https://clients2.google.com/cr/report"; | |
| 68 | |
| 69 static bool g_is_crash_reporter_enabled = false; | |
| 70 static uint64_t g_process_start_time = 0; | |
| 71 static char* g_crash_log_path = NULL; | |
| 72 static google_breakpad::ExceptionHandler* g_breakpad = NULL; | |
| 73 | |
| 74 // Writes the value |v| as 16 hex characters to the memory pointed at by | |
| 75 // |output|. | |
| 76 static void write_uint64_hex(char* output, uint64_t v) { | |
| 77 static const char hextable[] = "0123456789abcdef"; | |
| 78 | |
| 79 for (int i = 15; i >= 0; --i) { | |
| 80 output[i] = hextable[v & 15]; | |
| 81 v >>= 4; | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 // The following helper functions are for calculating uptime. | |
| 86 | |
| 87 // Converts a struct timeval to milliseconds. | |
| 88 static uint64_t timeval_to_ms(struct timeval *tv) { | |
| 89 uint64_t ret = tv->tv_sec; // Avoid overflow by explicitly using a uint64_t. | |
| 90 ret *= 1000; | |
| 91 ret += tv->tv_usec / 1000; | |
| 92 return ret; | |
| 93 } | |
| 94 | |
| 95 // Converts a struct timeval to milliseconds. | |
| 96 static uint64_t kernel_timeval_to_ms(struct kernel_timeval *tv) { | |
| 97 uint64_t ret = tv->tv_sec; // Avoid overflow by explicitly using a uint64_t. | |
| 98 ret *= 1000; | |
| 99 ret += tv->tv_usec / 1000; | |
| 100 return ret; | |
| 101 } | |
| 102 | |
| 103 // String buffer size to use to convert a uint64_t to string. | |
| 104 static size_t kUint64StringSize = 21; | |
| 105 | |
| 106 // uint64_t version of my_int_len() from | |
| 107 // breakpad/src/common/linux/linux_libc_support.h. Return the length of the | |
| 108 // given, non-negative integer when expressed in base 10. | |
| 109 static unsigned my_uint64_len(uint64_t i) { | |
| 110 if (!i) | |
| 111 return 1; | |
| 112 | |
| 113 unsigned len = 0; | |
| 114 while (i) { | |
| 115 len++; | |
| 116 i /= 10; | |
| 117 } | |
| 118 | |
| 119 return len; | |
| 120 } | |
| 121 | |
| 122 // uint64_t version of my_itos() from | |
| 123 // breakpad/src/common/linux/linux_libc_support.h. Convert a non-negative | |
| 124 // integer to a string (not null-terminated). | |
| 125 static void my_uint64tos(char* output, uint64_t i, unsigned i_len) { | |
| 126 for (unsigned index = i_len; index; --index, i /= 10) | |
| 127 output[index - 1] = '0' + (i % 10); | |
| 128 } | |
| 129 | |
| 130 #if defined(OS_ANDROID) | |
| 131 static char* my_strncpy(char* dst, const char* src, size_t len) { | |
| 132 int i = len; | |
| 133 char* p = dst; | |
| 134 if (!dst || !src) | |
| 135 return dst; | |
| 136 while (i != 0 && *src != '\0') { | |
| 137 *p++ = *src++; | |
| 138 i--; | |
| 139 } | |
| 140 while (i != 0) { | |
| 141 *p++ = '\0'; | |
| 142 i--; | |
| 143 } | |
| 144 return dst; | |
| 145 } | |
| 146 | |
| 147 static char* my_strncat(char *dest, const char *src, size_t len) { | |
| 148 char *ret = dest; | |
| 149 while (*dest) | |
| 150 dest++; | |
| 151 while (len--) | |
| 152 if (!(*dest++ = *src++)) | |
| 153 return ret; | |
| 154 *dest = 0; | |
| 155 return ret; | |
| 156 } | |
| 157 #endif | |
| 158 | |
| 159 namespace { | |
| 160 | |
| 161 // MIME substrings. | |
| 162 static const char g_rn[] = "\r\n"; | |
| 163 static const char g_form_data_msg[] = "Content-Disposition: form-data; name=\""; | |
| 164 static const char g_quote_msg[] = "\""; | |
| 165 static const char g_dashdash_msg[] = "--"; | |
| 166 static const char g_dump_msg[] = "upload_file_minidump\"; filename=\"dump\""; | |
| 167 static const char g_content_type_msg[] = | |
| 168 "Content-Type: application/octet-stream"; | |
| 169 | |
| 170 // MimeWriter manages an iovec for writing MIMEs to a file. | |
| 171 class MimeWriter { | |
| 172 public: | |
| 173 static const int kIovCapacity = 30; | |
| 174 static const size_t kMaxCrashChunkSize = 64; | |
| 175 | |
| 176 MimeWriter(int fd, const char* const mime_boundary); | |
| 177 ~MimeWriter(); | |
| 178 | |
| 179 // Append boundary. | |
| 180 void AddBoundary(); | |
| 181 | |
| 182 // Append end of file boundary. | |
| 183 void AddEnd(); | |
| 184 | |
| 185 // Append key/value pair with specified sizes. | |
| 186 void AddPairData(const char* msg_type, | |
| 187 size_t msg_type_size, | |
| 188 const char* msg_data, | |
| 189 size_t msg_data_size); | |
| 190 | |
| 191 // Append key/value pair. | |
| 192 void AddPairString(const char* msg_type, | |
| 193 const char* msg_data) { | |
| 194 AddPairData(msg_type, my_strlen(msg_type), msg_data, my_strlen(msg_data)); | |
| 195 } | |
| 196 | |
| 197 // Append key/value pair, splitting value into chunks no larger than | |
| 198 // |chunk_size|. |chunk_size| cannot be greater than |kMaxCrashChunkSize|. | |
| 199 // The msg_type string will have a counter suffix to distinguish each chunk. | |
| 200 void AddPairDataInChunks(const char* msg_type, | |
| 201 size_t msg_type_size, | |
| 202 const char* msg_data, | |
| 203 size_t msg_data_size, | |
| 204 size_t chunk_size, | |
| 205 bool strip_trailing_spaces); | |
| 206 | |
| 207 // Add binary file dump. Currently this is only done once, so the name is | |
| 208 // fixed. | |
| 209 void AddFileDump(uint8_t* file_data, | |
| 210 size_t file_size); | |
| 211 | |
| 212 // Flush any pending iovecs to the output file. | |
| 213 void Flush() { | |
| 214 IGNORE_RET(sys_writev(fd_, iov_, iov_index_)); | |
| 215 iov_index_ = 0; | |
| 216 } | |
| 217 | |
| 218 private: | |
| 219 void AddItem(const void* base, size_t size); | |
| 220 // Minor performance trade-off for easier-to-maintain code. | |
| 221 void AddString(const char* str) { | |
| 222 AddItem(str, my_strlen(str)); | |
| 223 } | |
| 224 void AddItemWithoutTrailingSpaces(const void* base, size_t size); | |
| 225 | |
| 226 struct kernel_iovec iov_[kIovCapacity]; | |
| 227 int iov_index_; | |
| 228 | |
| 229 // Output file descriptor. | |
| 230 int fd_; | |
| 231 | |
| 232 const char* const mime_boundary_; | |
| 233 | |
| 234 DISALLOW_COPY_AND_ASSIGN(MimeWriter); | |
| 235 }; | |
| 236 | |
| 237 MimeWriter::MimeWriter(int fd, const char* const mime_boundary) | |
| 238 : iov_index_(0), | |
| 239 fd_(fd), | |
| 240 mime_boundary_(mime_boundary) { | |
| 241 } | |
| 242 | |
| 243 MimeWriter::~MimeWriter() { | |
| 244 } | |
| 245 | |
| 246 void MimeWriter::AddBoundary() { | |
| 247 AddString(mime_boundary_); | |
| 248 AddString(g_rn); | |
| 249 } | |
| 250 | |
| 251 void MimeWriter::AddEnd() { | |
| 252 AddString(mime_boundary_); | |
| 253 AddString(g_dashdash_msg); | |
| 254 AddString(g_rn); | |
| 255 } | |
| 256 | |
| 257 void MimeWriter::AddPairData(const char* msg_type, | |
| 258 size_t msg_type_size, | |
| 259 const char* msg_data, | |
| 260 size_t msg_data_size) { | |
| 261 AddString(g_form_data_msg); | |
| 262 AddItem(msg_type, msg_type_size); | |
| 263 AddString(g_quote_msg); | |
| 264 AddString(g_rn); | |
| 265 AddString(g_rn); | |
| 266 AddItem(msg_data, msg_data_size); | |
| 267 AddString(g_rn); | |
| 268 } | |
| 269 | |
| 270 void MimeWriter::AddPairDataInChunks(const char* msg_type, | |
| 271 size_t msg_type_size, | |
| 272 const char* msg_data, | |
| 273 size_t msg_data_size, | |
| 274 size_t chunk_size, | |
| 275 bool strip_trailing_spaces) { | |
| 276 if (chunk_size > kMaxCrashChunkSize) | |
| 277 return; | |
| 278 | |
| 279 unsigned i = 0; | |
| 280 size_t done = 0, msg_length = msg_data_size; | |
| 281 | |
| 282 while (msg_length) { | |
| 283 char num[16]; | |
| 284 const unsigned num_len = my_int_len(++i); | |
| 285 my_itos(num, i, num_len); | |
| 286 | |
| 287 size_t chunk_len = std::min(chunk_size, msg_length); | |
| 288 | |
| 289 AddString(g_form_data_msg); | |
| 290 AddItem(msg_type, msg_type_size); | |
| 291 AddItem(num, num_len); | |
| 292 AddString(g_quote_msg); | |
| 293 AddString(g_rn); | |
| 294 AddString(g_rn); | |
| 295 if (strip_trailing_spaces) { | |
| 296 AddItemWithoutTrailingSpaces(msg_data + done, chunk_len); | |
| 297 } else { | |
| 298 AddItem(msg_data + done, chunk_len); | |
| 299 } | |
| 300 AddString(g_rn); | |
| 301 AddBoundary(); | |
| 302 Flush(); | |
| 303 | |
| 304 done += chunk_len; | |
| 305 msg_length -= chunk_len; | |
| 306 } | |
| 307 } | |
| 308 | |
| 309 void MimeWriter::AddFileDump(uint8_t* file_data, | |
| 310 size_t file_size) { | |
| 311 AddString(g_form_data_msg); | |
| 312 AddString(g_dump_msg); | |
| 313 AddString(g_rn); | |
| 314 AddString(g_content_type_msg); | |
| 315 AddString(g_rn); | |
| 316 AddString(g_rn); | |
| 317 AddItem(file_data, file_size); | |
| 318 AddString(g_rn); | |
| 319 } | |
| 320 | |
| 321 void MimeWriter::AddItem(const void* base, size_t size) { | |
| 322 // Check if the iovec is full and needs to be flushed to output file. | |
| 323 if (iov_index_ == kIovCapacity) { | |
| 324 Flush(); | |
| 325 } | |
| 326 iov_[iov_index_].iov_base = const_cast<void*>(base); | |
| 327 iov_[iov_index_].iov_len = size; | |
| 328 ++iov_index_; | |
| 329 } | |
| 330 | |
| 331 void MimeWriter::AddItemWithoutTrailingSpaces(const void* base, size_t size) { | |
| 332 while (size > 0) { | |
| 333 const char* c = static_cast<const char*>(base) + size - 1; | |
| 334 if (*c != ' ') | |
| 335 break; | |
| 336 size--; | |
| 337 } | |
| 338 AddItem(base, size); | |
| 339 } | |
| 340 | |
| 341 void DumpProcess() { | |
| 342 if (g_breakpad) | |
| 343 g_breakpad->WriteMinidump(); | |
| 344 } | |
| 345 | |
| 346 size_t WriteLog(const char* buf, size_t nbytes) { | |
| 347 #if defined(OS_ANDROID) | |
| 348 return __android_log_write(ANDROID_LOG_WARN, "google-breakpad", buf); | |
| 349 #else | |
| 350 return sys_write(2, buf, nbytes) | |
| 351 #endif | |
| 352 } | |
| 353 | |
| 354 } // namespace | |
| 355 | |
| 356 void HandleCrashDump(const BreakpadInfo& info) { | |
| 357 // WARNING: this code runs in a compromised context. It may not call into | |
| 358 // libc nor allocate memory normally. | |
| 359 | |
| 360 const int dumpfd = sys_open(info.filename, O_RDONLY, 0); | |
| 361 if (dumpfd < 0) { | |
| 362 static const char msg[] = "Cannot upload crash dump: failed to open\n"; | |
| 363 WriteLog(msg, sizeof(msg)); | |
| 364 return; | |
| 365 } | |
| 366 #if defined(OS_ANDROID) | |
| 367 struct stat st; | |
| 368 if (fstat(dumpfd, &st) != 0) { | |
| 369 #else | |
| 370 struct kernel_stat st; | |
| 371 if (sys_fstat(dumpfd, &st) != 0) { | |
| 372 #endif | |
| 373 static const char msg[] = "Cannot upload crash dump: stat failed\n"; | |
| 374 WriteLog(msg, sizeof(msg)); | |
| 375 IGNORE_RET(sys_close(dumpfd)); | |
| 376 return; | |
| 377 } | |
| 378 | |
| 379 google_breakpad::PageAllocator allocator; | |
| 380 | |
| 381 uint8_t* dump_data = reinterpret_cast<uint8_t*>(allocator.Alloc(st.st_size)); | |
| 382 if (!dump_data) { | |
| 383 static const char msg[] = "Cannot upload crash dump: cannot alloc\n"; | |
| 384 WriteLog(msg, sizeof(msg)); | |
| 385 IGNORE_RET(sys_close(dumpfd)); | |
| 386 return; | |
| 387 } | |
| 388 | |
| 389 sys_read(dumpfd, dump_data, st.st_size); | |
| 390 IGNORE_RET(sys_close(dumpfd)); | |
| 391 | |
| 392 // We need to build a MIME block for uploading to the server. Since we are | |
| 393 // going to fork and run wget, it needs to be written to a temp file. | |
| 394 | |
| 395 const int ufd = sys_open("/dev/urandom", O_RDONLY, 0); | |
| 396 if (ufd < 0) { | |
| 397 static const char msg[] = "Cannot upload crash dump because /dev/urandom" | |
| 398 " is missing\n"; | |
| 399 WriteLog(msg, sizeof(msg) - 1); | |
| 400 return; | |
| 401 } | |
| 402 | |
| 403 static const char temp_file_template[] = | |
| 404 "/tmp/chromium-upload-XXXXXXXXXXXXXXXX"; | |
| 405 char temp_file[sizeof(temp_file_template)]; | |
| 406 int temp_file_fd = -1; | |
| 407 if (info.upload) { | |
| 408 memcpy(temp_file, temp_file_template, sizeof(temp_file_template)); | |
| 409 | |
| 410 for (unsigned i = 0; i < 10; ++i) { | |
| 411 uint64_t t; | |
| 412 sys_read(ufd, &t, sizeof(t)); | |
| 413 write_uint64_hex(temp_file + sizeof(temp_file) - (16 + 1), t); | |
| 414 | |
| 415 temp_file_fd = sys_open(temp_file, O_WRONLY | O_CREAT | O_EXCL, 0600); | |
| 416 if (temp_file_fd >= 0) | |
| 417 break; | |
| 418 } | |
| 419 | |
| 420 if (temp_file_fd < 0) { | |
| 421 static const char msg[] = "Failed to create temporary file in /tmp: " | |
| 422 "cannot upload crash dump\n"; | |
| 423 WriteLog(msg, sizeof(msg) - 1); | |
| 424 IGNORE_RET(sys_close(ufd)); | |
| 425 return; | |
| 426 } | |
| 427 } else { | |
| 428 temp_file_fd = sys_open(info.filename, O_WRONLY, 0600); | |
| 429 if (temp_file_fd < 0) { | |
| 430 static const char msg[] = "Failed to save crash dump: failed to open\n"; | |
| 431 WriteLog(msg, sizeof(msg) - 1); | |
| 432 IGNORE_RET(sys_close(ufd)); | |
| 433 return; | |
| 434 } | |
| 435 } | |
| 436 | |
| 437 // The MIME boundary is 28 hyphens, followed by a 64-bit nonce and a NUL. | |
| 438 char mime_boundary[28 + 16 + 1]; | |
| 439 my_memset(mime_boundary, '-', 28); | |
| 440 uint64_t boundary_rand; | |
| 441 sys_read(ufd, &boundary_rand, sizeof(boundary_rand)); | |
| 442 write_uint64_hex(mime_boundary + 28, boundary_rand); | |
| 443 mime_boundary[28 + 16] = 0; | |
| 444 IGNORE_RET(sys_close(ufd)); | |
| 445 | |
| 446 // The MIME block looks like this: | |
| 447 // BOUNDARY \r\n | |
| 448 // Content-Disposition: form-data; name="prod" \r\n \r\n | |
| 449 // Chrome_Linux \r\n | |
| 450 // BOUNDARY \r\n | |
| 451 // Content-Disposition: form-data; name="ver" \r\n \r\n | |
| 452 // 1.2.3.4 \r\n | |
| 453 // BOUNDARY \r\n | |
| 454 // Content-Disposition: form-data; name="guid" \r\n \r\n | |
| 455 // 1.2.3.4 \r\n | |
| 456 // BOUNDARY \r\n | |
| 457 // | |
| 458 // zero or one: | |
| 459 // Content-Disposition: form-data; name="ptime" \r\n \r\n | |
| 460 // abcdef \r\n | |
| 461 // BOUNDARY \r\n | |
| 462 // | |
| 463 // zero or one: | |
| 464 // Content-Disposition: form-data; name="ptype" \r\n \r\n | |
| 465 // abcdef \r\n | |
| 466 // BOUNDARY \r\n | |
| 467 // | |
| 468 // zero or more gpu entries: | |
| 469 // Content-Disposition: form-data; name="gpu-xxxxx" \r\n \r\n | |
| 470 // <gpu-xxxxx> \r\n | |
| 471 // BOUNDARY \r\n | |
| 472 // | |
| 473 // zero or one: | |
| 474 // Content-Disposition: form-data; name="lsb-release" \r\n \r\n | |
| 475 // abcdef \r\n | |
| 476 // BOUNDARY \r\n | |
| 477 // | |
| 478 // zero or more: | |
| 479 // Content-Disposition: form-data; name="url-chunk-1" \r\n \r\n | |
| 480 // abcdef \r\n | |
| 481 // BOUNDARY \r\n | |
| 482 // | |
| 483 // zero or one: | |
| 484 // Content-Disposition: form-data; name="channel" \r\n \r\n | |
| 485 // beta \r\n | |
| 486 // BOUNDARY \r\n | |
| 487 // | |
| 488 // zero or one: | |
| 489 // Content-Disposition: form-data; name="num-views" \r\n \r\n | |
| 490 // 3 \r\n | |
| 491 // BOUNDARY \r\n | |
| 492 // | |
| 493 // zero or one: | |
| 494 // Content-Disposition: form-data; name="num-extensions" \r\n \r\n | |
| 495 // 5 \r\n | |
| 496 // BOUNDARY \r\n | |
| 497 // | |
| 498 // zero to 10: | |
| 499 // Content-Disposition: form-data; name="extension-1" \r\n \r\n | |
| 500 // abcdefghijklmnopqrstuvwxyzabcdef \r\n | |
| 501 // BOUNDARY \r\n | |
| 502 // | |
| 503 // zero to 4: | |
| 504 // Content-Disposition: form-data; name="prn-info-1" \r\n \r\n | |
| 505 // abcdefghijklmnopqrstuvwxyzabcdef \r\n | |
| 506 // BOUNDARY \r\n | |
| 507 // | |
| 508 // zero or one: | |
| 509 // Content-Disposition: form-data; name="num-switches" \r\n \r\n | |
| 510 // 5 \r\n | |
| 511 // BOUNDARY \r\n | |
| 512 // | |
| 513 // zero to 15: | |
| 514 // Content-Disposition: form-data; name="switch-1" \r\n \r\n | |
| 515 // --foo \r\n | |
| 516 // BOUNDARY \r\n | |
| 517 // | |
| 518 // zero or one: | |
| 519 // Content-Disposition: form-data; name="oom-size" \r\n \r\n | |
| 520 // 1234567890 \r\n | |
| 521 // BOUNDARY \r\n | |
| 522 // | |
| 523 // Content-Disposition: form-data; name="dump"; filename="dump" \r\n | |
| 524 // Content-Type: application/octet-stream \r\n \r\n | |
| 525 // <dump contents> | |
| 526 // \r\n BOUNDARY -- \r\n | |
| 527 | |
| 528 MimeWriter writer(temp_file_fd, mime_boundary); | |
| 529 { | |
| 530 #if defined(OS_ANDROID) | |
| 531 static const char chrome_product_msg[] = "Chrome_Android"; | |
| 532 #elif defined(OS_CHROMEOS) | |
| 533 static const char chrome_product_msg[] = "Chrome_ChromeOS"; | |
| 534 #else // OS_LINUX | |
| 535 static const char chrome_product_msg[] = "Chrome_Linux"; | |
| 536 #endif | |
| 537 | |
| 538 #if defined (OS_ANDROID) | |
| 539 base::android::BuildInfo* android_build_info = | |
| 540 base::android::BuildInfo::GetInstance(); | |
| 541 static const char* version_msg = | |
| 542 android_build_info->package_version_code(); | |
| 543 static const char android_build_id[] = "android_build_id"; | |
| 544 static const char android_build_fp[] = "android_build_fp"; | |
| 545 static const char device[] = "device"; | |
| 546 static const char model[] = "model"; | |
| 547 static const char brand[] = "brand"; | |
| 548 #else | |
| 549 static const char version_msg[] = PRODUCT_VERSION; | |
| 550 #endif | |
| 551 | |
| 552 writer.AddBoundary(); | |
| 553 writer.AddPairString("prod", chrome_product_msg); | |
| 554 writer.AddBoundary(); | |
| 555 writer.AddPairString("ver", version_msg); | |
| 556 writer.AddBoundary(); | |
| 557 writer.AddPairString("guid", info.guid); | |
| 558 writer.AddBoundary(); | |
| 559 if (info.pid > 0) { | |
| 560 uint64_t pid_str_len = my_uint64_len(info.pid); | |
| 561 char* pid_buf = reinterpret_cast<char*>(allocator.Alloc(pid_str_len)); | |
| 562 my_uint64tos(pid_buf, info.pid, pid_str_len); | |
| 563 writer.AddPairString("pid", pid_buf); | |
| 564 writer.AddBoundary(); | |
| 565 } | |
| 566 #if defined(OS_ANDROID) | |
| 567 // Addtional MIME blocks are added for logging on Android devices. | |
| 568 writer.AddPairString( | |
| 569 android_build_id, android_build_info->android_build_id()); | |
| 570 writer.AddBoundary(); | |
| 571 writer.AddPairString( | |
| 572 android_build_fp, android_build_info->android_build_fp()); | |
| 573 writer.AddBoundary(); | |
| 574 writer.AddPairString(device, android_build_info->device()); | |
| 575 writer.AddBoundary(); | |
| 576 writer.AddPairString(model, android_build_info->model()); | |
| 577 writer.AddBoundary(); | |
| 578 writer.AddPairString(brand, android_build_info->brand()); | |
| 579 writer.AddBoundary(); | |
| 580 #endif | |
| 581 writer.Flush(); | |
| 582 } | |
| 583 | |
| 584 if (info.process_start_time > 0) { | |
| 585 struct kernel_timeval tv; | |
| 586 if (!sys_gettimeofday(&tv, NULL)) { | |
| 587 uint64_t time = kernel_timeval_to_ms(&tv); | |
| 588 if (time > info.process_start_time) { | |
| 589 time -= info.process_start_time; | |
| 590 char time_str[kUint64StringSize]; | |
| 591 const unsigned time_len = my_uint64_len(time); | |
| 592 my_uint64tos(time_str, time, time_len); | |
| 593 | |
| 594 static const char process_time_msg[] = "ptime"; | |
| 595 writer.AddPairData(process_time_msg, sizeof(process_time_msg) - 1, | |
| 596 time_str, time_len); | |
| 597 writer.AddBoundary(); | |
| 598 writer.Flush(); | |
| 599 } | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 if (info.process_type_length) { | |
| 604 writer.AddPairString("ptype", info.process_type); | |
| 605 writer.AddBoundary(); | |
| 606 writer.Flush(); | |
| 607 } | |
| 608 | |
| 609 // If GPU info is known, send it. | |
| 610 unsigned gpu_vendor_len = my_strlen(child_process_logging::g_gpu_vendor_id); | |
| 611 if (gpu_vendor_len) { | |
| 612 static const char vendor_msg[] = "gpu-venid"; | |
| 613 static const char device_msg[] = "gpu-devid"; | |
| 614 static const char driver_msg[] = "gpu-driver"; | |
| 615 static const char psver_msg[] = "gpu-psver"; | |
| 616 static const char vsver_msg[] = "gpu-vsver"; | |
| 617 | |
| 618 writer.AddPairString(vendor_msg, child_process_logging::g_gpu_vendor_id); | |
| 619 writer.AddBoundary(); | |
| 620 writer.AddPairString(device_msg, child_process_logging::g_gpu_device_id); | |
| 621 writer.AddBoundary(); | |
| 622 writer.AddPairString(driver_msg, child_process_logging::g_gpu_driver_ver); | |
| 623 writer.AddBoundary(); | |
| 624 writer.AddPairString(psver_msg, child_process_logging::g_gpu_ps_ver); | |
| 625 writer.AddBoundary(); | |
| 626 writer.AddPairString(vsver_msg, child_process_logging::g_gpu_vs_ver); | |
| 627 writer.AddBoundary(); | |
| 628 writer.Flush(); | |
| 629 } | |
| 630 | |
| 631 if (info.distro_length) { | |
| 632 static const char distro_msg[] = "lsb-release"; | |
| 633 writer.AddPairString(distro_msg, info.distro); | |
| 634 writer.AddBoundary(); | |
| 635 writer.Flush(); | |
| 636 } | |
| 637 | |
| 638 // For renderers and plugins. | |
| 639 if (info.crash_url_length) { | |
| 640 static const char url_chunk_msg[] = "url-chunk-"; | |
| 641 static const unsigned kMaxUrlLength = 8 * MimeWriter::kMaxCrashChunkSize; | |
| 642 writer.AddPairDataInChunks(url_chunk_msg, sizeof(url_chunk_msg) - 1, | |
| 643 info.crash_url, std::min(info.crash_url_length, kMaxUrlLength), | |
| 644 MimeWriter::kMaxCrashChunkSize, false /* Don't strip whitespaces. */); | |
| 645 } | |
| 646 | |
| 647 if (my_strlen(child_process_logging::g_channel)) { | |
| 648 writer.AddPairString("channel", child_process_logging::g_channel); | |
| 649 writer.AddBoundary(); | |
| 650 writer.Flush(); | |
| 651 } | |
| 652 | |
| 653 if (my_strlen(child_process_logging::g_num_views)) { | |
| 654 writer.AddPairString("num-views", child_process_logging::g_num_views); | |
| 655 writer.AddBoundary(); | |
| 656 writer.Flush(); | |
| 657 } | |
| 658 | |
| 659 if (my_strlen(child_process_logging::g_num_extensions)) { | |
| 660 writer.AddPairString("num-extensions", | |
| 661 child_process_logging::g_num_extensions); | |
| 662 writer.AddBoundary(); | |
| 663 writer.Flush(); | |
| 664 } | |
| 665 | |
| 666 unsigned extension_ids_len = | |
| 667 my_strlen(child_process_logging::g_extension_ids); | |
| 668 if (extension_ids_len) { | |
| 669 static const char extension_msg[] = "extension-"; | |
| 670 static const unsigned kMaxExtensionsLen = | |
| 671 kMaxReportedActiveExtensions * child_process_logging::kExtensionLen; | |
| 672 writer.AddPairDataInChunks(extension_msg, sizeof(extension_msg) - 1, | |
| 673 child_process_logging::g_extension_ids, | |
| 674 std::min(extension_ids_len, kMaxExtensionsLen), | |
| 675 child_process_logging::kExtensionLen, | |
| 676 false /* Don't strip whitespace. */); | |
| 677 } | |
| 678 | |
| 679 unsigned printer_info_len = | |
| 680 my_strlen(child_process_logging::g_printer_info); | |
| 681 if (printer_info_len) { | |
| 682 static const char printer_info_msg[] = "prn-info-"; | |
| 683 static const unsigned kMaxPrnInfoLen = | |
| 684 kMaxReportedPrinterRecords * child_process_logging::kPrinterInfoStrLen; | |
| 685 writer.AddPairDataInChunks(printer_info_msg, sizeof(printer_info_msg) - 1, | |
| 686 child_process_logging::g_printer_info, | |
| 687 std::min(printer_info_len, kMaxPrnInfoLen), | |
| 688 child_process_logging::kPrinterInfoStrLen, | |
| 689 true); | |
| 690 } | |
| 691 | |
| 692 if (my_strlen(child_process_logging::g_num_switches)) { | |
| 693 writer.AddPairString("num-switches", | |
| 694 child_process_logging::g_num_switches); | |
| 695 writer.AddBoundary(); | |
| 696 writer.Flush(); | |
| 697 } | |
| 698 | |
| 699 unsigned switches_len = | |
| 700 my_strlen(child_process_logging::g_switches); | |
| 701 if (switches_len) { | |
| 702 static const char switch_msg[] = "switch-"; | |
| 703 static const unsigned kMaxSwitchLen = | |
| 704 kMaxSwitches * child_process_logging::kSwitchLen; | |
| 705 writer.AddPairDataInChunks(switch_msg, sizeof(switch_msg) - 1, | |
| 706 child_process_logging::g_switches, | |
| 707 std::min(switches_len, kMaxSwitchLen), | |
| 708 child_process_logging::kSwitchLen, | |
| 709 true /* Strip whitespace since switches are padded to kSwitchLen. */); | |
| 710 } | |
| 711 | |
| 712 if (info.oom_size) { | |
| 713 char oom_size_str[kUint64StringSize]; | |
| 714 const unsigned oom_size_len = my_uint64_len(info.oom_size); | |
| 715 my_uint64tos(oom_size_str, info.oom_size, oom_size_len); | |
| 716 static const char oom_size_msg[] = "oom-size"; | |
| 717 writer.AddPairData(oom_size_msg, sizeof(oom_size_msg) - 1, | |
| 718 oom_size_str, oom_size_len); | |
| 719 writer.AddBoundary(); | |
| 720 writer.Flush(); | |
| 721 } | |
| 722 | |
| 723 writer.AddFileDump(dump_data, st.st_size); | |
| 724 writer.AddEnd(); | |
| 725 writer.Flush(); | |
| 726 | |
| 727 IGNORE_RET(sys_close(temp_file_fd)); | |
| 728 #if defined(OS_ANDROID) | |
| 729 uint64_t pid_str_len = my_uint64_len(info.pid); | |
| 730 char* pid_buf = reinterpret_cast<char*>(allocator.Alloc(pid_str_len)); | |
| 731 my_uint64tos(pid_buf, info.pid, pid_str_len); | |
| 732 | |
| 733 static const char* output_msg = "Output crash dump file:"; | |
| 734 WriteLog(output_msg, my_strlen(output_msg)); | |
| 735 unsigned filename_len = my_strlen(info.filename); | |
| 736 WriteLog(info.filename, filename_len); | |
| 737 // -1 because we won't need the null terminator on the original filename. | |
| 738 size_t done_filename_len = filename_len - 1 + pid_str_len; | |
| 739 char* done_filename = reinterpret_cast<char*>( | |
| 740 allocator.Alloc(done_filename_len)); | |
| 741 // Rename the file such that the pid is the suffix in order to signal other | |
| 742 // processes that the minidump is complete. The advantage of using the pid as | |
| 743 // the suffix is that it is trivial to associate the minidump with the | |
| 744 // crashed process. | |
| 745 // Finally, note strncpy prevents null terminators from | |
| 746 // being copied. Pad the rest with 0's. | |
| 747 my_strncpy(done_filename, info.filename, done_filename_len); | |
| 748 // Append the suffix a null terminator should be added. | |
| 749 my_strncat(done_filename, pid_buf, pid_str_len); | |
| 750 // Rename the minidump file to signal that it is complete. | |
| 751 if (rename(info.filename, done_filename)) { | |
| 752 __android_log_write(ANDROID_LOG_WARN, "chromium", "Failed to rename:"); | |
| 753 __android_log_write(ANDROID_LOG_WARN, "chromium", info.filename); | |
| 754 __android_log_write(ANDROID_LOG_WARN, "chromium", "to"); | |
| 755 __android_log_write(ANDROID_LOG_WARN, "chromium", done_filename); | |
| 756 } | |
| 757 #endif | |
| 758 | |
| 759 if (!info.upload) | |
| 760 return; | |
| 761 | |
| 762 // The --header argument to wget looks like: | |
| 763 // --header=Content-Type: multipart/form-data; boundary=XYZ | |
| 764 // where the boundary has two fewer leading '-' chars | |
| 765 static const char header_msg[] = | |
| 766 "--header=Content-Type: multipart/form-data; boundary="; | |
| 767 char* const header = reinterpret_cast<char*>(allocator.Alloc( | |
| 768 sizeof(header_msg) - 1 + sizeof(mime_boundary) - 2)); | |
| 769 memcpy(header, header_msg, sizeof(header_msg) - 1); | |
| 770 memcpy(header + sizeof(header_msg) - 1, mime_boundary + 2, | |
| 771 sizeof(mime_boundary) - 2); | |
| 772 // We grab the NUL byte from the end of |mime_boundary|. | |
| 773 | |
| 774 // The --post-file argument to wget looks like: | |
| 775 // --post-file=/tmp/... | |
| 776 static const char post_file_msg[] = "--post-file="; | |
| 777 char* const post_file = reinterpret_cast<char*>(allocator.Alloc( | |
| 778 sizeof(post_file_msg) - 1 + sizeof(temp_file))); | |
| 779 memcpy(post_file, post_file_msg, sizeof(post_file_msg) - 1); | |
| 780 memcpy(post_file + sizeof(post_file_msg) - 1, temp_file, sizeof(temp_file)); | |
| 781 | |
| 782 const pid_t child = sys_fork(); | |
| 783 if (!child) { | |
| 784 // Spawned helper process. | |
| 785 // | |
| 786 // This code is called both when a browser is crashing (in which case, | |
| 787 // nothing really matters any more) and when a renderer/plugin crashes, in | |
| 788 // which case we need to continue. | |
| 789 // | |
| 790 // Since we are a multithreaded app, if we were just to fork(), we might | |
| 791 // grab file descriptors which have just been created in another thread and | |
| 792 // hold them open for too long. | |
| 793 // | |
| 794 // Thus, we have to loop and try and close everything. | |
| 795 const int fd = sys_open("/proc/self/fd", O_DIRECTORY | O_RDONLY, 0); | |
| 796 if (fd < 0) { | |
| 797 for (unsigned i = 3; i < 8192; ++i) | |
| 798 IGNORE_RET(sys_close(i)); | |
| 799 } else { | |
| 800 google_breakpad::DirectoryReader reader(fd); | |
| 801 const char* name; | |
| 802 while (reader.GetNextEntry(&name)) { | |
| 803 int i; | |
| 804 if (my_strtoui(&i, name) && i > 2 && i != fd) | |
| 805 IGNORE_RET(sys_close(i)); | |
| 806 reader.PopEntry(); | |
| 807 } | |
| 808 | |
| 809 IGNORE_RET(sys_close(fd)); | |
| 810 } | |
| 811 | |
| 812 IGNORE_RET(sys_setsid()); | |
| 813 | |
| 814 // Leave one end of a pipe in the wget process and watch for it getting | |
| 815 // closed by the wget process exiting. | |
| 816 int fds[2]; | |
| 817 if (sys_pipe(fds) >= 0) { | |
| 818 const pid_t wget_child = sys_fork(); | |
| 819 if (!wget_child) { | |
| 820 // Wget process. | |
| 821 IGNORE_RET(sys_close(fds[0])); | |
| 822 IGNORE_RET(sys_dup2(fds[1], 3)); | |
| 823 static const char* const kWgetBinary = "/usr/bin/wget"; | |
| 824 const char* args[] = { | |
| 825 kWgetBinary, | |
| 826 header, | |
| 827 post_file, | |
| 828 kUploadURL, | |
| 829 "--timeout=10", // Set a timeout so we don't hang forever. | |
| 830 "--tries=1", // Don't retry if the upload fails. | |
| 831 "-O", // output reply to fd 3 | |
| 832 "/dev/fd/3", | |
| 833 NULL, | |
| 834 }; | |
| 835 | |
| 836 execve(kWgetBinary, const_cast<char**>(args), environ); | |
| 837 static const char msg[] = "Cannot upload crash dump: cannot exec " | |
| 838 "/usr/bin/wget\n"; | |
| 839 WriteLog(msg, sizeof(msg) - 1); | |
| 840 sys__exit(1); | |
| 841 } | |
| 842 | |
| 843 // Helper process. | |
| 844 if (wget_child > 0) { | |
| 845 IGNORE_RET(sys_close(fds[1])); | |
| 846 char id_buf[17]; // Crash report IDs are expected to be 16 chars. | |
| 847 ssize_t len = -1; | |
| 848 // Wget should finish in about 10 seconds. Add a few more 500 ms | |
| 849 // internals to account for process startup time. | |
| 850 for (size_t wait_count = 0; wait_count < 24; ++wait_count) { | |
| 851 struct kernel_pollfd poll_fd; | |
| 852 poll_fd.fd = fds[0]; | |
| 853 poll_fd.events = POLLIN | POLLPRI | POLLERR; | |
| 854 int ret = sys_poll(&poll_fd, 1, 500); | |
| 855 if (ret < 0) { | |
| 856 // Error | |
| 857 break; | |
| 858 } else if (ret > 0) { | |
| 859 // There is data to read. | |
| 860 len = HANDLE_EINTR(sys_read(fds[0], id_buf, sizeof(id_buf) - 1)); | |
| 861 break; | |
| 862 } | |
| 863 // ret == 0 -> timed out, continue waiting. | |
| 864 } | |
| 865 if (len > 0) { | |
| 866 // Write crash dump id to stderr. | |
| 867 id_buf[len] = 0; | |
| 868 static const char msg[] = "\nCrash dump id: "; | |
| 869 WriteLog(msg, sizeof(msg) - 1); | |
| 870 WriteLog(id_buf, my_strlen(id_buf)); | |
| 871 WriteLog("\n", 1); | |
| 872 | |
| 873 // Write crash dump id to crash log as: seconds_since_epoch,crash_id | |
| 874 struct kernel_timeval tv; | |
| 875 if (g_crash_log_path && !sys_gettimeofday(&tv, NULL)) { | |
| 876 uint64_t time = kernel_timeval_to_ms(&tv) / 1000; | |
| 877 char time_str[kUint64StringSize]; | |
| 878 const unsigned time_len = my_uint64_len(time); | |
| 879 my_uint64tos(time_str, time, time_len); | |
| 880 | |
| 881 int log_fd = sys_open(g_crash_log_path, | |
| 882 O_CREAT | O_WRONLY | O_APPEND, | |
| 883 0600); | |
| 884 if (log_fd > 0) { | |
| 885 sys_write(log_fd, time_str, time_len); | |
| 886 sys_write(log_fd, ",", 1); | |
| 887 sys_write(log_fd, id_buf, my_strlen(id_buf)); | |
| 888 sys_write(log_fd, "\n", 1); | |
| 889 IGNORE_RET(sys_close(log_fd)); | |
| 890 } | |
| 891 } | |
| 892 } | |
| 893 if (sys_waitpid(wget_child, NULL, WNOHANG) == 0) { | |
| 894 // Wget process is still around, kill it. | |
| 895 sys_kill(wget_child, SIGKILL); | |
| 896 } | |
| 897 } | |
| 898 } | |
| 899 | |
| 900 // Helper process. | |
| 901 IGNORE_RET(sys_unlink(info.filename)); | |
| 902 IGNORE_RET(sys_unlink(temp_file)); | |
| 903 sys__exit(0); | |
| 904 } | |
| 905 | |
| 906 // Main browser process. | |
| 907 if (child <= 0) | |
| 908 return; | |
| 909 HANDLE_EINTR(sys_waitpid(child, NULL, 0)); | |
| 910 } | |
| 911 | |
| 912 static bool CrashDone(const char* dump_path, | |
| 913 const char* minidump_id, | |
| 914 const bool upload, | |
| 915 const bool succeeded) { | |
| 916 // WARNING: this code runs in a compromised context. It may not call into | |
| 917 // libc nor allocate memory normally. | |
| 918 if (!succeeded) | |
| 919 return false; | |
| 920 | |
| 921 google_breakpad::PageAllocator allocator; | |
| 922 const unsigned dump_path_len = my_strlen(dump_path); | |
| 923 const unsigned minidump_id_len = my_strlen(minidump_id); | |
| 924 char* const path = reinterpret_cast<char*>(allocator.Alloc( | |
| 925 dump_path_len + 1 /* '/' */ + minidump_id_len + | |
| 926 4 /* ".dmp" */ + 1 /* NUL */)); | |
| 927 memcpy(path, dump_path, dump_path_len); | |
| 928 path[dump_path_len] = '/'; | |
| 929 memcpy(path + dump_path_len + 1, minidump_id, minidump_id_len); | |
| 930 memcpy(path + dump_path_len + 1 + minidump_id_len, ".dmp", 4); | |
| 931 path[dump_path_len + 1 + minidump_id_len + 4] = 0; | |
| 932 | |
| 933 BreakpadInfo info; | |
| 934 info.filename = path; | |
| 935 info.process_type = "browser"; | |
| 936 info.process_type_length = 7; | |
| 937 info.crash_url = NULL; | |
| 938 info.crash_url_length = 0; | |
| 939 info.guid = child_process_logging::g_client_id; | |
| 940 info.guid_length = my_strlen(child_process_logging::g_client_id); | |
| 941 info.distro = base::g_linux_distro; | |
| 942 info.distro_length = my_strlen(base::g_linux_distro); | |
| 943 info.upload = upload; | |
| 944 info.process_start_time = g_process_start_time; | |
| 945 info.oom_size = base::g_oom_size; | |
| 946 info.pid = 0; | |
| 947 HandleCrashDump(info); | |
| 948 return true; | |
| 949 } | |
| 950 | |
| 951 // Wrapper function, do not add more code here. | |
| 952 static bool CrashDoneNoUpload(const char* dump_path, | |
| 953 const char* minidump_id, | |
| 954 void* context, | |
| 955 bool succeeded) { | |
| 956 return CrashDone(dump_path, minidump_id, false, succeeded); | |
| 957 } | |
| 958 | |
| 959 #if !defined(OS_ANDROID) | |
| 960 // Wrapper function, do not add more code here. | |
| 961 static bool CrashDoneUpload(const char* dump_path, | |
| 962 const char* minidump_id, | |
| 963 void* context, | |
| 964 bool succeeded) { | |
| 965 return CrashDone(dump_path, minidump_id, true, succeeded); | |
| 966 } | |
| 967 #endif | |
| 968 | |
| 969 void EnableCrashDumping(bool unattended) { | |
| 970 g_is_crash_reporter_enabled = true; | |
| 971 | |
| 972 FilePath tmp_path("/tmp"); | |
| 973 PathService::Get(base::DIR_TEMP, &tmp_path); | |
| 974 | |
| 975 FilePath dumps_path(tmp_path); | |
| 976 if (PathService::Get(chrome::DIR_CRASH_DUMPS, &dumps_path)) { | |
| 977 FilePath logfile = | |
| 978 dumps_path.AppendASCII(CrashUploadList::kReporterLogFilename); | |
| 979 std::string logfile_str = logfile.value(); | |
| 980 const size_t crash_log_path_len = logfile_str.size() + 1; | |
| 981 g_crash_log_path = new char[crash_log_path_len]; | |
| 982 strncpy(g_crash_log_path, logfile_str.c_str(), crash_log_path_len); | |
| 983 } | |
| 984 DCHECK(!g_breakpad); | |
| 985 #if defined(OS_ANDROID) | |
| 986 unattended = true; | |
| 987 #endif | |
| 988 if (unattended) { | |
| 989 g_breakpad = new google_breakpad::ExceptionHandler( | |
| 990 dumps_path.value().c_str(), | |
| 991 NULL, | |
| 992 CrashDoneNoUpload, | |
| 993 NULL, | |
| 994 true /* install handlers */); | |
| 995 } else { | |
| 996 g_breakpad = new google_breakpad::ExceptionHandler( | |
| 997 tmp_path.value().c_str(), | |
| 998 NULL, | |
| 999 CrashDoneUpload, | |
| 1000 NULL, | |
| 1001 true /* install handlers */); | |
| 1002 } | |
| 1003 } | |
| 1004 | |
| 1005 // Non-Browser = Extension, Gpu, Plugins, Ppapi and Renderer | |
| 1006 static bool NonBrowserCrashHandler(const void* crash_context, | |
| 1007 size_t crash_context_size, | |
| 1008 void* context) { | |
| 1009 const int fd = reinterpret_cast<intptr_t>(context); | |
| 1010 int fds[2] = { -1, -1 }; | |
| 1011 if (sys_socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) { | |
| 1012 static const char msg[] = "Failed to create socket for crash dumping.\n"; | |
| 1013 WriteLog(msg, sizeof(msg)-1); | |
| 1014 return false; | |
| 1015 } | |
| 1016 | |
| 1017 // On kernels with ptrace protection, e.g. Ubuntu 10.10+, the browser cannot | |
| 1018 // ptrace this crashing process and crash dumping will fail. When using the | |
| 1019 // SUID sandbox, this crashing process is likely to be in its own PID | |
| 1020 // namespace, and thus there is no way to permit only the browser process to | |
| 1021 // ptrace it. | |
| 1022 // The workaround is to allow all processes to ptrace this process if we | |
| 1023 // reach this point, by passing -1 as the allowed PID. However, support for | |
| 1024 // passing -1 as the PID won't reach kernels until around the Ubuntu 12.04 | |
| 1025 // timeframe. | |
| 1026 sys_prctl(PR_SET_PTRACER, -1); | |
| 1027 | |
| 1028 // Start constructing the message to send to the browser. | |
| 1029 char guid[kGuidSize + 1] = {0}; | |
| 1030 char crash_url[kMaxActiveURLSize + 1] = {0}; | |
| 1031 char distro[kDistroSize + 1] = {0}; | |
| 1032 const size_t guid_len = | |
| 1033 std::min(my_strlen(child_process_logging::g_client_id), kGuidSize); | |
| 1034 const size_t crash_url_len = | |
| 1035 std::min(my_strlen(child_process_logging::g_active_url), | |
| 1036 kMaxActiveURLSize); | |
| 1037 const size_t distro_len = | |
| 1038 std::min(my_strlen(base::g_linux_distro), kDistroSize); | |
| 1039 memcpy(guid, child_process_logging::g_client_id, guid_len); | |
| 1040 memcpy(crash_url, child_process_logging::g_active_url, crash_url_len); | |
| 1041 memcpy(distro, base::g_linux_distro, distro_len); | |
| 1042 | |
| 1043 char b; // Dummy variable for sys_read below. | |
| 1044 const char* b_addr = &b; // Get the address of |b| so we can create the | |
| 1045 // expected /proc/[pid]/syscall content in the | |
| 1046 // browser to convert namespace tids. | |
| 1047 | |
| 1048 // The length of the control message: | |
| 1049 static const unsigned kControlMsgSize = sizeof(fds); | |
| 1050 static const unsigned kControlMsgSpaceSize = CMSG_SPACE(kControlMsgSize); | |
| 1051 static const unsigned kControlMsgLenSize = CMSG_LEN(kControlMsgSize); | |
| 1052 | |
| 1053 const size_t kIovSize = 8; | |
| 1054 struct kernel_msghdr msg; | |
| 1055 my_memset(&msg, 0, sizeof(struct kernel_msghdr)); | |
| 1056 struct kernel_iovec iov[kIovSize]; | |
| 1057 iov[0].iov_base = const_cast<void*>(crash_context); | |
| 1058 iov[0].iov_len = crash_context_size; | |
| 1059 iov[1].iov_base = guid; | |
| 1060 iov[1].iov_len = kGuidSize + 1; | |
| 1061 iov[2].iov_base = crash_url; | |
| 1062 iov[2].iov_len = kMaxActiveURLSize + 1; | |
| 1063 iov[3].iov_base = distro; | |
| 1064 iov[3].iov_len = kDistroSize + 1; | |
| 1065 iov[4].iov_base = &b_addr; | |
| 1066 iov[4].iov_len = sizeof(b_addr); | |
| 1067 iov[5].iov_base = &fds[0]; | |
| 1068 iov[5].iov_len = sizeof(fds[0]); | |
| 1069 iov[6].iov_base = &g_process_start_time; | |
| 1070 iov[6].iov_len = sizeof(g_process_start_time); | |
| 1071 iov[7].iov_base = &base::g_oom_size; | |
| 1072 iov[7].iov_len = sizeof(base::g_oom_size); | |
| 1073 | |
| 1074 msg.msg_iov = iov; | |
| 1075 msg.msg_iovlen = kIovSize; | |
| 1076 char cmsg[kControlMsgSpaceSize]; | |
| 1077 my_memset(cmsg, 0, kControlMsgSpaceSize); | |
| 1078 msg.msg_control = cmsg; | |
| 1079 msg.msg_controllen = sizeof(cmsg); | |
| 1080 | |
| 1081 struct cmsghdr *hdr = CMSG_FIRSTHDR(&msg); | |
| 1082 hdr->cmsg_level = SOL_SOCKET; | |
| 1083 hdr->cmsg_type = SCM_RIGHTS; | |
| 1084 hdr->cmsg_len = kControlMsgLenSize; | |
| 1085 ((int*) CMSG_DATA(hdr))[0] = fds[0]; | |
| 1086 ((int*) CMSG_DATA(hdr))[1] = fds[1]; | |
| 1087 | |
| 1088 if (HANDLE_EINTR(sys_sendmsg(fd, &msg, 0)) < 0) { | |
| 1089 static const char errmsg[] = "Failed to tell parent about crash.\n"; | |
| 1090 WriteLog(errmsg, sizeof(errmsg)-1); | |
| 1091 IGNORE_RET(sys_close(fds[1])); | |
| 1092 return false; | |
| 1093 } | |
| 1094 IGNORE_RET(sys_close(fds[1])); | |
| 1095 | |
| 1096 if (HANDLE_EINTR(sys_read(fds[0], &b, 1)) != 1) { | |
| 1097 static const char errmsg[] = "Parent failed to complete crash dump.\n"; | |
| 1098 WriteLog(errmsg, sizeof(errmsg)-1); | |
| 1099 } | |
| 1100 | |
| 1101 return true; | |
| 1102 } | |
| 1103 | |
| 1104 void EnableNonBrowserCrashDumping() { | |
| 1105 const int fd = base::GlobalDescriptors::GetInstance()->Get(kCrashDumpSignal); | |
| 1106 g_is_crash_reporter_enabled = true; | |
| 1107 // We deliberately leak this object. | |
| 1108 DCHECK(!g_breakpad); | |
| 1109 g_breakpad = new google_breakpad::ExceptionHandler( | |
| 1110 "" /* unused */, NULL, NULL, reinterpret_cast<void*>(fd), true); | |
| 1111 g_breakpad->set_crash_handler(NonBrowserCrashHandler); | |
| 1112 } | |
| 1113 | |
| 1114 void InitCrashReporter() { | |
| 1115 #if defined(OS_ANDROID) | |
| 1116 // This will guarantee that the BuildInfo has been initialized and subsequent | |
| 1117 // calls will not require memory allocation. | |
| 1118 base::android::BuildInfo::GetInstance(); | |
| 1119 #endif | |
| 1120 // Determine the process type and take appropriate action. | |
| 1121 const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess(); | |
| 1122 if (parsed_command_line.HasSwitch(switches::kDisableBreakpad)) | |
| 1123 return; | |
| 1124 | |
| 1125 const std::string process_type = | |
| 1126 parsed_command_line.GetSwitchValueASCII(switches::kProcessType); | |
| 1127 if (process_type.empty()) { | |
| 1128 EnableCrashDumping(getenv(env_vars::kHeadless) != NULL); | |
| 1129 } else if (process_type == switches::kRendererProcess || | |
| 1130 process_type == switches::kPluginProcess || | |
| 1131 process_type == switches::kPpapiPluginProcess || | |
| 1132 process_type == switches::kZygoteProcess || | |
| 1133 process_type == switches::kGpuProcess) { | |
| 1134 #if defined(OS_ANDROID) | |
| 1135 child_process_logging::SetClientId("Android"); | |
| 1136 #endif | |
| 1137 // We might be chrooted in a zygote or renderer process so we cannot call | |
| 1138 // GetCollectStatsConsent because that needs access the the user's home | |
| 1139 // dir. Instead, we set a command line flag for these processes. | |
| 1140 // Even though plugins are not chrooted, we share the same code path for | |
| 1141 // simplicity. | |
| 1142 if (!parsed_command_line.HasSwitch(switches::kEnableCrashReporter)) | |
| 1143 return; | |
| 1144 // Get the guid and linux distro from the command line switch. | |
| 1145 std::string switch_value = | |
| 1146 parsed_command_line.GetSwitchValueASCII(switches::kEnableCrashReporter); | |
| 1147 size_t separator = switch_value.find(","); | |
| 1148 if (separator != std::string::npos) { | |
| 1149 child_process_logging::SetClientId(switch_value.substr(0, separator)); | |
| 1150 base::SetLinuxDistro(switch_value.substr(separator + 1)); | |
| 1151 } else { | |
| 1152 child_process_logging::SetClientId(switch_value); | |
| 1153 } | |
| 1154 EnableNonBrowserCrashDumping(); | |
| 1155 } | |
| 1156 | |
| 1157 // Set the base process start time value. | |
| 1158 struct timeval tv; | |
| 1159 if (!gettimeofday(&tv, NULL)) | |
| 1160 g_process_start_time = timeval_to_ms(&tv); | |
| 1161 else | |
| 1162 g_process_start_time = 0; | |
| 1163 | |
| 1164 logging::SetDumpWithoutCrashingFunction(&DumpProcess); | |
| 1165 } | |
| 1166 | |
| 1167 bool IsCrashReporterEnabled() { | |
| 1168 return g_is_crash_reporter_enabled; | |
| 1169 } | |
| OLD | NEW |
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