1 //===-- asan_rtl.cc -------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is a part of AddressSanitizer, an address sanity checker. 11 // 12 // Main file of the ASan run-time library. 13 //===----------------------------------------------------------------------===// 14 #include "asan_allocator.h" 15 #include "asan_interceptors.h" 16 #include "asan_internal.h" 17 #include "asan_mapping.h" 18 #include "asan_report.h" 19 #include "asan_stack.h" 20 #include "asan_stats.h" 21 #include "asan_thread.h" 22 #include "asan_thread_registry.h" 23 #include "sanitizer_common/sanitizer_atomic.h" 24 #include "sanitizer_common/sanitizer_flags.h" 25 #include "sanitizer_common/sanitizer_libc.h" 26 #include "sanitizer_common/sanitizer_symbolizer.h" 27 28 namespace __asan { 29 30 uptr AsanMappingProfile[kAsanMappingProfileSize]; 31 32 static void AsanDie() { 33 static atomic_uint32_t num_calls; 34 if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) { 35 // Don't die twice - run a busy loop. 36 while (1) { } 37 } 38 if (flags()->sleep_before_dying) { 39 Report("Sleeping for %d second(s)\n", flags()->sleep_before_dying); 40 SleepForSeconds(flags()->sleep_before_dying); 41 } 42 if (flags()->unmap_shadow_on_exit) { 43 if (kMidMemBeg) { 44 UnmapOrDie((void*)kLowShadowBeg, kMidMemBeg - kLowShadowBeg); 45 UnmapOrDie((void*)kMidMemEnd, kHighShadowEnd - kMidMemEnd); 46 } else { 47 UnmapOrDie((void*)kLowShadowBeg, kHighShadowEnd - kLowShadowBeg); 48 } 49 } 50 if (death_callback) 51 death_callback(); 52 if (flags()->abort_on_error) 53 Abort(); 54 internal__exit(flags()->exitcode); 55 } 56 57 static void AsanCheckFailed(const char *file, int line, const char *cond, 58 u64 v1, u64 v2) { 59 Report("AddressSanitizer CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx)\n", 60 file, line, cond, (uptr)v1, (uptr)v2); 61 // FIXME: check for infinite recursion without a thread-local counter here. 62 PRINT_CURRENT_STACK(); 63 Die(); 64 } 65 66 // -------------------------- Flags ------------------------- {{{1 67 static const int kDeafultMallocContextSize = 30; 68 69 static Flags asan_flags; 70 71 Flags *flags() { 72 return &asan_flags; 73 } 74 75 static const char *MaybeCallAsanDefaultOptions() { 76 return (&__asan_default_options) ? __asan_default_options() : ""; 77 } 78 79 static const char *MaybeUseAsanDefaultOptionsCompileDefiniton() { 80 #ifdef ASAN_DEFAULT_OPTIONS 81 // Stringize the macro value. 82 # define ASAN_STRINGIZE(x) #x 83 # define ASAN_STRINGIZE_OPTIONS(options) ASAN_STRINGIZE(options) 84 return ASAN_STRINGIZE_OPTIONS(ASAN_DEFAULT_OPTIONS); 85 #else 86 return ""; 87 #endif 88 } 89 90 static void ParseFlagsFromString(Flags *f, const char *str) { 91 ParseFlag(str, &f->quarantine_size, "quarantine_size"); 92 ParseFlag(str, &f->symbolize, "symbolize"); 93 ParseFlag(str, &f->verbosity, "verbosity"); 94 ParseFlag(str, &f->redzone, "redzone"); 95 CHECK(f->redzone >= 16); 96 CHECK(IsPowerOfTwo(f->redzone)); 97 98 ParseFlag(str, &f->debug, "debug"); 99 ParseFlag(str, &f->report_globals, "report_globals"); 100 ParseFlag(str, &f->check_initialization_order, "initialization_order"); 101 ParseFlag(str, &f->malloc_context_size, "malloc_context_size"); 102 CHECK((uptr)f->malloc_context_size <= kStackTraceMax); 103 104 ParseFlag(str, &f->replace_str, "replace_str"); 105 ParseFlag(str, &f->replace_intrin, "replace_intrin"); 106 ParseFlag(str, &f->mac_ignore_invalid_free, "mac_ignore_invalid_free"); 107 ParseFlag(str, &f->use_fake_stack, "use_fake_stack"); 108 ParseFlag(str, &f->max_malloc_fill_size, "max_malloc_fill_size"); 109 ParseFlag(str, &f->exitcode, "exitcode"); 110 ParseFlag(str, &f->allow_user_poisoning, "allow_user_poisoning"); 111 ParseFlag(str, &f->sleep_before_dying, "sleep_before_dying"); 112 ParseFlag(str, &f->handle_segv, "handle_segv"); 113 ParseFlag(str, &f->use_sigaltstack, "use_sigaltstack"); 114 ParseFlag(str, &f->check_malloc_usable_size, "check_malloc_usable_size"); 115 ParseFlag(str, &f->unmap_shadow_on_exit, "unmap_shadow_on_exit"); 116 ParseFlag(str, &f->abort_on_error, "abort_on_error"); 117 ParseFlag(str, &f->print_stats, "print_stats"); 118 ParseFlag(str, &f->print_legend, "print_legend"); 119 ParseFlag(str, &f->atexit, "atexit"); 120 ParseFlag(str, &f->disable_core, "disable_core"); 121 ParseFlag(str, &f->strip_path_prefix, "strip_path_prefix"); 122 ParseFlag(str, &f->allow_reexec, "allow_reexec"); 123 ParseFlag(str, &f->print_full_thread_history, "print_full_thread_history"); 124 ParseFlag(str, &f->log_path, "log_path"); 125 ParseFlag(str, &f->fast_unwind_on_fatal, "fast_unwind_on_fatal"); 126 ParseFlag(str, &f->fast_unwind_on_malloc, "fast_unwind_on_malloc"); 127 ParseFlag(str, &f->poison_heap, "poison_heap"); 128 ParseFlag(str, &f->alloc_dealloc_mismatch, "alloc_dealloc_mismatch"); 129 ParseFlag(str, &f->use_stack_depot, "use_stack_depot"); 130 ParseFlag(str, &f->strict_memcmp, "strict_memcmp"); 131 } 132 133 static const char *asan_external_symbolizer; 134 135 void InitializeFlags(Flags *f, const char *env) { 136 internal_memset(f, 0, sizeof(*f)); 137 138 f->quarantine_size = (ASAN_LOW_MEMORY) ? 1UL << 26 : 1UL << 28; 139 f->symbolize = (asan_external_symbolizer != 0); 140 f->verbosity = 0; 141 f->redzone = ASAN_ALLOCATOR_VERSION == 2 ? 16 : (ASAN_LOW_MEMORY) ? 64 : 128; 142 f->debug = false; 143 f->report_globals = 1; 144 f->check_initialization_order = false; 145 f->malloc_context_size = kDeafultMallocContextSize; 146 f->replace_str = true; 147 f->replace_intrin = true; 148 f->mac_ignore_invalid_free = false; 149 f->use_fake_stack = true; 150 f->max_malloc_fill_size = 0; 151 f->exitcode = ASAN_DEFAULT_FAILURE_EXITCODE; 152 f->allow_user_poisoning = true; 153 f->sleep_before_dying = 0; 154 f->handle_segv = ASAN_NEEDS_SEGV; 155 f->use_sigaltstack = false; 156 f->check_malloc_usable_size = true; 157 f->unmap_shadow_on_exit = false; 158 f->abort_on_error = false; 159 f->print_stats = false; 160 f->print_legend = true; 161 f->atexit = false; 162 f->disable_core = (SANITIZER_WORDSIZE == 64); 163 f->strip_path_prefix = ""; 164 f->allow_reexec = true; 165 f->print_full_thread_history = true; 166 f->log_path = 0; 167 f->fast_unwind_on_fatal = false; 168 f->fast_unwind_on_malloc = true; 169 f->poison_heap = true; 170 // Turn off alloc/dealloc mismatch checker on Mac for now. 171 // TODO(glider): Fix known issues and enable this back. 172 f->alloc_dealloc_mismatch = (ASAN_MAC == 0);; 173 f->use_stack_depot = true; // Only affects allocator2. 174 f->strict_memcmp = true; 175 176 // Override from compile definition. 177 ParseFlagsFromString(f, MaybeUseAsanDefaultOptionsCompileDefiniton()); 178 179 // Override from user-specified string. 180 ParseFlagsFromString(f, MaybeCallAsanDefaultOptions()); 181 if (flags()->verbosity) { 182 Report("Using the defaults from __asan_default_options: %s\n", 183 MaybeCallAsanDefaultOptions()); 184 } 185 186 // Override from command line. 187 ParseFlagsFromString(f, env); 188 } 189 190 // -------------------------- Globals --------------------- {{{1 191 int asan_inited; 192 bool asan_init_is_running; 193 void (*death_callback)(void); 194 195 #if !ASAN_FIXED_MAPPING 196 uptr kHighMemEnd, kMidMemBeg, kMidMemEnd; 197 #endif 198 199 // -------------------------- Misc ---------------- {{{1 200 void ShowStatsAndAbort() { 201 __asan_print_accumulated_stats(); 202 Die(); 203 } 204 205 // ---------------------- mmap -------------------- {{{1 206 // Reserve memory range [beg, end]. 207 static void ReserveShadowMemoryRange(uptr beg, uptr end) { 208 CHECK((beg % GetPageSizeCached()) == 0); 209 CHECK(((end + 1) % GetPageSizeCached()) == 0); 210 uptr size = end - beg + 1; 211 void *res = MmapFixedNoReserve(beg, size); 212 if (res != (void*)beg) { 213 Report("ReserveShadowMemoryRange failed while trying to map 0x%zx bytes. " 214 "Perhaps you're using ulimit -v\n", size); 215 Abort(); 216 } 217 } 218 219 // --------------- LowLevelAllocateCallbac ---------- {{{1 220 static void OnLowLevelAllocate(uptr ptr, uptr size) { 221 PoisonShadow(ptr, size, kAsanInternalHeapMagic); 222 } 223 224 // -------------------------- Run-time entry ------------------- {{{1 225 // exported functions 226 #define ASAN_REPORT_ERROR(type, is_write, size) \ 227 extern "C" NOINLINE INTERFACE_ATTRIBUTE \ 228 void __asan_report_ ## type ## size(uptr addr); \ 229 void __asan_report_ ## type ## size(uptr addr) { \ 230 GET_CALLER_PC_BP_SP; \ 231 __asan_report_error(pc, bp, sp, addr, is_write, size); \ 232 } 233 234 ASAN_REPORT_ERROR(load, false, 1) 235 ASAN_REPORT_ERROR(load, false, 2) 236 ASAN_REPORT_ERROR(load, false, 4) 237 ASAN_REPORT_ERROR(load, false, 8) 238 ASAN_REPORT_ERROR(load, false, 16) 239 ASAN_REPORT_ERROR(store, true, 1) 240 ASAN_REPORT_ERROR(store, true, 2) 241 ASAN_REPORT_ERROR(store, true, 4) 242 ASAN_REPORT_ERROR(store, true, 8) 243 ASAN_REPORT_ERROR(store, true, 16) 244 245 #define ASAN_REPORT_ERROR_N(type, is_write) \ 246 extern "C" NOINLINE INTERFACE_ATTRIBUTE \ 247 void __asan_report_ ## type ## _n(uptr addr, uptr size); \ 248 void __asan_report_ ## type ## _n(uptr addr, uptr size) { \ 249 GET_CALLER_PC_BP_SP; \ 250 __asan_report_error(pc, bp, sp, addr, is_write, size); \ 251 } 252 253 ASAN_REPORT_ERROR_N(load, false) 254 ASAN_REPORT_ERROR_N(store, true) 255 256 // Force the linker to keep the symbols for various ASan interface functions. 257 // We want to keep those in the executable in order to let the instrumented 258 // dynamic libraries access the symbol even if it is not used by the executable 259 // itself. This should help if the build system is removing dead code at link 260 // time. 261 static NOINLINE void force_interface_symbols() { 262 volatile int fake_condition = 0; // prevent dead condition elimination. 263 // __asan_report_* functions are noreturn, so we need a switch to prevent 264 // the compiler from removing any of them. 265 switch (fake_condition) { 266 case 1: __asan_report_load1(0); break; 267 case 2: __asan_report_load2(0); break; 268 case 3: __asan_report_load4(0); break; 269 case 4: __asan_report_load8(0); break; 270 case 5: __asan_report_load16(0); break; 271 case 6: __asan_report_store1(0); break; 272 case 7: __asan_report_store2(0); break; 273 case 8: __asan_report_store4(0); break; 274 case 9: __asan_report_store8(0); break; 275 case 10: __asan_report_store16(0); break; 276 case 12: __asan_register_globals(0, 0); break; 277 case 13: __asan_unregister_globals(0, 0); break; 278 case 14: __asan_set_death_callback(0); break; 279 case 15: __asan_set_error_report_callback(0); break; 280 case 16: __asan_handle_no_return(); break; 281 case 17: __asan_address_is_poisoned(0); break; 282 case 18: __asan_get_allocated_size(0); break; 283 case 19: __asan_get_current_allocated_bytes(); break; 284 case 20: __asan_get_estimated_allocated_size(0); break; 285 case 21: __asan_get_free_bytes(); break; 286 case 22: __asan_get_heap_size(); break; 287 case 23: __asan_get_ownership(0); break; 288 case 24: __asan_get_unmapped_bytes(); break; 289 case 25: __asan_poison_memory_region(0, 0); break; 290 case 26: __asan_unpoison_memory_region(0, 0); break; 291 case 27: __asan_set_error_exit_code(0); break; 292 case 28: __asan_stack_free(0, 0, 0); break; 293 case 29: __asan_stack_malloc(0, 0); break; 294 case 30: __asan_before_dynamic_init(0, 0); break; 295 case 31: __asan_after_dynamic_init(); break; 296 case 32: __asan_poison_stack_memory(0, 0); break; 297 case 33: __asan_unpoison_stack_memory(0, 0); break; 298 case 34: __asan_region_is_poisoned(0, 0); break; 299 case 35: __asan_describe_address(0); break; 300 } 301 } 302 303 static void asan_atexit() { 304 Printf("AddressSanitizer exit stats:\n"); 305 __asan_print_accumulated_stats(); 306 // Print AsanMappingProfile. 307 for (uptr i = 0; i < kAsanMappingProfileSize; i++) { 308 if (AsanMappingProfile[i] == 0) continue; 309 Printf("asan_mapping.h:%zd -- %zd\n", i, AsanMappingProfile[i]); 310 } 311 } 312 313 static void InitializeHighMemEnd() { 314 #if !ASAN_FIXED_MAPPING 315 #if SANITIZER_WORDSIZE == 64 316 # if defined(__powerpc64__) 317 // FIXME: 318 // On PowerPC64 we have two different address space layouts: 44- and 46-bit. 319 // We somehow need to figure our which one we are using now and choose 320 // one of 0x00000fffffffffffUL and 0x00003fffffffffffUL. 321 // Note that with 'ulimit -s unlimited' the stack is moved away from the top 322 // of the address space, so simply checking the stack address is not enough. 323 kHighMemEnd = (1ULL << 44) - 1; // 0x00000fffffffffffUL 324 # else 325 kHighMemEnd = (1ULL << 47) - 1; // 0x00007fffffffffffUL; 326 # endif 327 #else // SANITIZER_WORDSIZE == 32 328 kHighMemEnd = (1ULL << 32) - 1; // 0xffffffff; 329 #endif // SANITIZER_WORDSIZE 330 #endif // !ASAN_FIXED_MAPPING 331 } 332 333 static void ProtectGap(uptr a, uptr size) { 334 CHECK_EQ(a, (uptr)Mprotect(a, size)); 335 } 336 337 static void PrintAddressSpaceLayout() { 338 Printf("|| `[%p, %p]` || HighMem ||\n", 339 (void*)kHighMemBeg, (void*)kHighMemEnd); 340 Printf("|| `[%p, %p]` || HighShadow ||\n", 341 (void*)kHighShadowBeg, (void*)kHighShadowEnd); 342 if (kMidMemBeg) { 343 Printf("|| `[%p, %p]` || ShadowGap3 ||\n", 344 (void*)kShadowGap3Beg, (void*)kShadowGap3End); 345 Printf("|| `[%p, %p]` || MidMem ||\n", 346 (void*)kMidMemBeg, (void*)kMidMemEnd); 347 Printf("|| `[%p, %p]` || ShadowGap2 ||\n", 348 (void*)kShadowGap2Beg, (void*)kShadowGap2End); 349 Printf("|| `[%p, %p]` || MidShadow ||\n", 350 (void*)kMidShadowBeg, (void*)kMidShadowEnd); 351 } 352 Printf("|| `[%p, %p]` || ShadowGap ||\n", 353 (void*)kShadowGapBeg, (void*)kShadowGapEnd); 354 if (kLowShadowBeg) { 355 Printf("|| `[%p, %p]` || LowShadow ||\n", 356 (void*)kLowShadowBeg, (void*)kLowShadowEnd); 357 Printf("|| `[%p, %p]` || LowMem ||\n", 358 (void*)kLowMemBeg, (void*)kLowMemEnd); 359 } 360 Printf("MemToShadow(shadow): %p %p %p %p", 361 (void*)MEM_TO_SHADOW(kLowShadowBeg), 362 (void*)MEM_TO_SHADOW(kLowShadowEnd), 363 (void*)MEM_TO_SHADOW(kHighShadowBeg), 364 (void*)MEM_TO_SHADOW(kHighShadowEnd)); 365 if (kMidMemBeg) { 366 Printf(" %p %p", 367 (void*)MEM_TO_SHADOW(kMidShadowBeg), 368 (void*)MEM_TO_SHADOW(kMidShadowEnd)); 369 } 370 Printf("\n"); 371 Printf("red_zone=%zu\n", (uptr)flags()->redzone); 372 Printf("malloc_context_size=%zu\n", (uptr)flags()->malloc_context_size); 373 374 Printf("SHADOW_SCALE: %zx\n", (uptr)SHADOW_SCALE); 375 Printf("SHADOW_GRANULARITY: %zx\n", (uptr)SHADOW_GRANULARITY); 376 Printf("SHADOW_OFFSET: %zx\n", (uptr)SHADOW_OFFSET); 377 CHECK(SHADOW_SCALE >= 3 && SHADOW_SCALE <= 7); 378 if (kMidMemBeg) 379 CHECK(kMidShadowBeg > kLowShadowEnd && 380 kMidMemBeg > kMidShadowEnd && 381 kHighShadowBeg > kMidMemEnd); 382 } 383 384 } // namespace __asan 385 386 // ---------------------- Interface ---------------- {{{1 387 using namespace __asan; // NOLINT 388 389 #if !SANITIZER_SUPPORTS_WEAK_HOOKS 390 extern "C" { 391 SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE 392 const char* __asan_default_options() { return ""; } 393 } // extern "C" 394 #endif 395 396 int NOINLINE __asan_set_error_exit_code(int exit_code) { 397 int old = flags()->exitcode; 398 flags()->exitcode = exit_code; 399 return old; 400 } 401 402 void NOINLINE __asan_handle_no_return() { 403 int local_stack; 404 AsanThread *curr_thread = asanThreadRegistry().GetCurrent(); 405 CHECK(curr_thread); 406 uptr PageSize = GetPageSizeCached(); 407 uptr top = curr_thread->stack_top(); 408 uptr bottom = ((uptr)&local_stack - PageSize) & ~(PageSize-1); 409 PoisonShadow(bottom, top - bottom, 0); 410 } 411 412 void NOINLINE __asan_set_death_callback(void (*callback)(void)) { 413 death_callback = callback; 414 } 415 416 void __asan_init() { 417 if (asan_inited) return; 418 SanitizerToolName = "AddressSanitizer"; 419 CHECK(!asan_init_is_running && "ASan init calls itself!"); 420 asan_init_is_running = true; 421 InitializeHighMemEnd(); 422 423 // Make sure we are not statically linked. 424 AsanDoesNotSupportStaticLinkage(); 425 426 // Install tool-specific callbacks in sanitizer_common. 427 SetDieCallback(AsanDie); 428 SetCheckFailedCallback(AsanCheckFailed); 429 SetPrintfAndReportCallback(AppendToErrorMessageBuffer); 430 431 // Check if external symbolizer is defined before parsing the flags. 432 asan_external_symbolizer = GetEnv("ASAN_SYMBOLIZER_PATH"); 433 // Initialize flags. This must be done early, because most of the 434 // initialization steps look at flags(). 435 const char *options = GetEnv("ASAN_OPTIONS"); 436 InitializeFlags(flags(), options); 437 __sanitizer_set_report_path(flags()->log_path); 438 439 if (flags()->verbosity && options) { 440 Report("Parsed ASAN_OPTIONS: %s\n", options); 441 } 442 443 // Re-exec ourselves if we need to set additional env or command line args. 444 MaybeReexec(); 445 446 // Setup internal allocator callback. 447 SetLowLevelAllocateCallback(OnLowLevelAllocate); 448 449 if (flags()->atexit) { 450 Atexit(asan_atexit); 451 } 452 453 // interceptors 454 InitializeAsanInterceptors(); 455 456 ReplaceSystemMalloc(); 457 ReplaceOperatorsNewAndDelete(); 458 459 uptr shadow_start = kLowShadowBeg; 460 if (kLowShadowBeg) shadow_start -= GetMmapGranularity(); 461 uptr shadow_end = kHighShadowEnd; 462 bool full_shadow_is_available = 463 MemoryRangeIsAvailable(shadow_start, shadow_end); 464 465 #if ASAN_LINUX && defined(__x86_64__) && !ASAN_FIXED_MAPPING 466 if (!full_shadow_is_available) { 467 kMidMemBeg = kLowMemEnd < 0x3000000000ULL ? 0x3000000000ULL : 0; 468 kMidMemEnd = kLowMemEnd < 0x3000000000ULL ? 0x4fffffffffULL : 0; 469 } 470 #endif 471 472 if (flags()->verbosity) 473 PrintAddressSpaceLayout(); 474 475 if (flags()->disable_core) { 476 DisableCoreDumper(); 477 } 478 479 if (full_shadow_is_available) { 480 // mmap the low shadow plus at least one page at the left. 481 if (kLowShadowBeg) 482 ReserveShadowMemoryRange(shadow_start, kLowShadowEnd); 483 // mmap the high shadow. 484 ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd); 485 // protect the gap. 486 ProtectGap(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1); 487 } else if (kMidMemBeg && 488 MemoryRangeIsAvailable(shadow_start, kMidMemBeg - 1) && 489 MemoryRangeIsAvailable(kMidMemEnd + 1, shadow_end)) { 490 CHECK(kLowShadowBeg != kLowShadowEnd); 491 // mmap the low shadow plus at least one page at the left. 492 ReserveShadowMemoryRange(shadow_start, kLowShadowEnd); 493 // mmap the mid shadow. 494 ReserveShadowMemoryRange(kMidShadowBeg, kMidShadowEnd); 495 // mmap the high shadow. 496 ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd); 497 // protect the gaps. 498 ProtectGap(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1); 499 ProtectGap(kShadowGap2Beg, kShadowGap2End - kShadowGap2Beg + 1); 500 ProtectGap(kShadowGap3Beg, kShadowGap3End - kShadowGap3Beg + 1); 501 } else { 502 Report("Shadow memory range interleaves with an existing memory mapping. " 503 "ASan cannot proceed correctly. ABORTING.\n"); 504 DumpProcessMap(); 505 Die(); 506 } 507 508 InstallSignalHandlers(); 509 // Start symbolizer process if necessary. 510 if (flags()->symbolize && asan_external_symbolizer && 511 asan_external_symbolizer[0]) { 512 InitializeExternalSymbolizer(asan_external_symbolizer); 513 } 514 515 // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited 516 // should be set to 1 prior to initializing the threads. 517 asan_inited = 1; 518 asan_init_is_running = false; 519 520 asanThreadRegistry().Init(); 521 asanThreadRegistry().GetMain()->ThreadStart(); 522 force_interface_symbols(); // no-op. 523 524 InitializeAllocator(); 525 526 if (flags()->verbosity) { 527 Report("AddressSanitizer Init done\n"); 528 } 529 } 530
