asan_rtl.cc revision ae51c273d55fa172908cf940c238eacec0f73223 
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_interface_internal.h"
17#include "asan_internal.h"
18#include "asan_mapping.h"
19#include "asan_poisoning.h"
20#include "asan_report.h"
21#include "asan_stack.h"
22#include "asan_stats.h"
23#include "asan_thread.h"
24#include "sanitizer_common/sanitizer_atomic.h"
25#include "sanitizer_common/sanitizer_flags.h"
26#include "sanitizer_common/sanitizer_libc.h"
27#include "sanitizer_common/sanitizer_symbolizer.h"
28#include "lsan/lsan_common.h"
29
30int __asan_option_detect_stack_use_after_return;  // Global interface symbol.
31
32namespace __asan {
33
34uptr AsanMappingProfile[kAsanMappingProfileSize];
35
36static void AsanDie() {
37  static atomic_uint32_t num_calls;
38  if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
39    // Don't die twice - run a busy loop.
40    while (1) { }
41  }
42  if (flags()->sleep_before_dying) {
43    Report("Sleeping for %d second(s)\n", flags()->sleep_before_dying);
44    SleepForSeconds(flags()->sleep_before_dying);
45  }
46  if (flags()->unmap_shadow_on_exit) {
47    if (kMidMemBeg) {
48      UnmapOrDie((void*)kLowShadowBeg, kMidMemBeg - kLowShadowBeg);
49      UnmapOrDie((void*)kMidMemEnd, kHighShadowEnd - kMidMemEnd);
50    } else {
51      UnmapOrDie((void*)kLowShadowBeg, kHighShadowEnd - kLowShadowBeg);
52    }
53  }
54  if (death_callback)
55    death_callback();
56  if (flags()->abort_on_error)
57    Abort();
58  internal__exit(flags()->exitcode);
59}
60
61static void AsanCheckFailed(const char *file, int line, const char *cond,
62                            u64 v1, u64 v2) {
63  Report("AddressSanitizer CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx)\n",
64             file, line, cond, (uptr)v1, (uptr)v2);
65  // FIXME: check for infinite recursion without a thread-local counter here.
66  PRINT_CURRENT_STACK();
67  Die();
68}
69
70// -------------------------- Flags ------------------------- {{{1
71static const int kDefaultMallocContextSize = 30;
72
73Flags asan_flags_dont_use_directly;  // use via flags().
74
75static const char *MaybeCallAsanDefaultOptions() {
76  return (&__asan_default_options) ? __asan_default_options() : "";
77}
78
79static 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
90static void ParseFlagsFromString(Flags *f, const char *str) {
91  ParseCommonFlagsFromString(str);
92  CHECK((uptr)common_flags()->malloc_context_size <= kStackTraceMax);
93
94  ParseFlag(str, &f->quarantine_size, "quarantine_size");
95  ParseFlag(str, &f->redzone, "redzone");
96  CHECK_GE(f->redzone, 16);
97  CHECK(IsPowerOfTwo(f->redzone));
98
99  ParseFlag(str, &f->debug, "debug");
100  ParseFlag(str, &f->report_globals, "report_globals");
101  ParseFlag(str, &f->check_initialization_order, "check_initialization_order");
102
103  ParseFlag(str, &f->replace_str, "replace_str");
104  ParseFlag(str, &f->replace_intrin, "replace_intrin");
105  ParseFlag(str, &f->mac_ignore_invalid_free, "mac_ignore_invalid_free");
106  ParseFlag(str, &f->detect_stack_use_after_return,
107            "detect_stack_use_after_return");
108  ParseFlag(str, &f->uar_stack_size_log, "uar_stack_size_log");
109  ParseFlag(str, &f->max_malloc_fill_size, "max_malloc_fill_size");
110  ParseFlag(str, &f->malloc_fill_byte, "malloc_fill_byte");
111  ParseFlag(str, &f->exitcode, "exitcode");
112  ParseFlag(str, &f->allow_user_poisoning, "allow_user_poisoning");
113  ParseFlag(str, &f->sleep_before_dying, "sleep_before_dying");
114  ParseFlag(str, &f->handle_segv, "handle_segv");
115  ParseFlag(str, &f->allow_user_segv_handler, "allow_user_segv_handler");
116  ParseFlag(str, &f->use_sigaltstack, "use_sigaltstack");
117  ParseFlag(str, &f->check_malloc_usable_size, "check_malloc_usable_size");
118  ParseFlag(str, &f->unmap_shadow_on_exit, "unmap_shadow_on_exit");
119  ParseFlag(str, &f->abort_on_error, "abort_on_error");
120  ParseFlag(str, &f->print_stats, "print_stats");
121  ParseFlag(str, &f->print_legend, "print_legend");
122  ParseFlag(str, &f->atexit, "atexit");
123  ParseFlag(str, &f->disable_core, "disable_core");
124  ParseFlag(str, &f->allow_reexec, "allow_reexec");
125  ParseFlag(str, &f->print_full_thread_history, "print_full_thread_history");
126  ParseFlag(str, &f->poison_heap, "poison_heap");
127  ParseFlag(str, &f->poison_partial, "poison_partial");
128  ParseFlag(str, &f->alloc_dealloc_mismatch, "alloc_dealloc_mismatch");
129  ParseFlag(str, &f->strict_memcmp, "strict_memcmp");
130  ParseFlag(str, &f->strict_init_order, "strict_init_order");
131}
132
133void InitializeFlags(Flags *f, const char *env) {
134  CommonFlags *cf = common_flags();
135  SetCommonFlagDefaults();
136  cf->external_symbolizer_path = GetEnv("ASAN_SYMBOLIZER_PATH");
137  cf->malloc_context_size = kDefaultMallocContextSize;
138
139  internal_memset(f, 0, sizeof(*f));
140  f->quarantine_size = (ASAN_LOW_MEMORY) ? 1UL << 26 : 1UL << 28;
141  f->redzone = 16;
142  f->debug = false;
143  f->report_globals = 1;
144  f->check_initialization_order = false;
145  f->replace_str = true;
146  f->replace_intrin = true;
147  f->mac_ignore_invalid_free = false;
148  f->detect_stack_use_after_return = false;  // Also needs the compiler flag.
149  f->uar_stack_size_log = 0;
150  f->max_malloc_fill_size = 0x1000;  // By default, fill only the first 4K.
151  f->malloc_fill_byte = 0xbe;
152  f->exitcode = ASAN_DEFAULT_FAILURE_EXITCODE;
153  f->allow_user_poisoning = true;
154  f->sleep_before_dying = 0;
155  f->handle_segv = ASAN_NEEDS_SEGV;
156  f->allow_user_segv_handler = false;
157  f->use_sigaltstack = false;
158  f->check_malloc_usable_size = true;
159  f->unmap_shadow_on_exit = false;
160  f->abort_on_error = false;
161  f->print_stats = false;
162  f->print_legend = true;
163  f->atexit = false;
164  f->disable_core = (SANITIZER_WORDSIZE == 64);
165  f->allow_reexec = true;
166  f->print_full_thread_history = true;
167  f->poison_heap = true;
168  f->poison_partial = true;
169  // Turn off alloc/dealloc mismatch checker on Mac and Windows for now.
170  // TODO(glider,timurrrr): Fix known issues and enable this back.
171  f->alloc_dealloc_mismatch = (SANITIZER_MAC == 0) && (SANITIZER_WINDOWS == 0);
172  f->strict_memcmp = true;
173  f->strict_init_order = false;
174
175  // Override from compile definition.
176  ParseFlagsFromString(f, MaybeUseAsanDefaultOptionsCompileDefiniton());
177
178  // Override from user-specified string.
179  ParseFlagsFromString(f, MaybeCallAsanDefaultOptions());
180  if (common_flags()->verbosity) {
181    Report("Using the defaults from __asan_default_options: %s\n",
182           MaybeCallAsanDefaultOptions());
183  }
184
185  // Override from command line.
186  ParseFlagsFromString(f, env);
187
188#if !CAN_SANITIZE_LEAKS
189  if (cf->detect_leaks) {
190    Report("%s: detect_leaks is not supported on this platform.\n",
191           SanitizerToolName);
192    cf->detect_leaks = false;
193  }
194#endif
195
196  // Make "strict_init_order" imply "check_initialization_order".
197  // TODO(samsonov): Use a single runtime flag for an init-order checker.
198  if (f->strict_init_order) {
199    f->check_initialization_order = true;
200  }
201}
202
203// -------------------------- Globals --------------------- {{{1
204int asan_inited;
205bool asan_init_is_running;
206void (*death_callback)(void);
207
208#if !ASAN_FIXED_MAPPING
209uptr kHighMemEnd, kMidMemBeg, kMidMemEnd;
210#endif
211
212// -------------------------- Misc ---------------- {{{1
213void ShowStatsAndAbort() {
214  __asan_print_accumulated_stats();
215  Die();
216}
217
218// ---------------------- mmap -------------------- {{{1
219// Reserve memory range [beg, end].
220static void ReserveShadowMemoryRange(uptr beg, uptr end) {
221  CHECK_EQ((beg % GetPageSizeCached()), 0);
222  CHECK_EQ(((end + 1) % GetPageSizeCached()), 0);
223  uptr size = end - beg + 1;
224  void *res = MmapFixedNoReserve(beg, size);
225  if (res != (void*)beg) {
226    Report("ReserveShadowMemoryRange failed while trying to map 0x%zx bytes. "
227           "Perhaps you're using ulimit -v\n", size);
228    Abort();
229  }
230}
231
232// --------------- LowLevelAllocateCallbac ---------- {{{1
233static void OnLowLevelAllocate(uptr ptr, uptr size) {
234  PoisonShadow(ptr, size, kAsanInternalHeapMagic);
235}
236
237// -------------------------- Run-time entry ------------------- {{{1
238// exported functions
239#define ASAN_REPORT_ERROR(type, is_write, size)                     \
240extern "C" NOINLINE INTERFACE_ATTRIBUTE                        \
241void __asan_report_ ## type ## size(uptr addr);                \
242void __asan_report_ ## type ## size(uptr addr) {               \
243  GET_CALLER_PC_BP_SP;                                              \
244  __asan_report_error(pc, bp, sp, addr, is_write, size);            \
245}
246
247ASAN_REPORT_ERROR(load, false, 1)
248ASAN_REPORT_ERROR(load, false, 2)
249ASAN_REPORT_ERROR(load, false, 4)
250ASAN_REPORT_ERROR(load, false, 8)
251ASAN_REPORT_ERROR(load, false, 16)
252ASAN_REPORT_ERROR(store, true, 1)
253ASAN_REPORT_ERROR(store, true, 2)
254ASAN_REPORT_ERROR(store, true, 4)
255ASAN_REPORT_ERROR(store, true, 8)
256ASAN_REPORT_ERROR(store, true, 16)
257
258#define ASAN_REPORT_ERROR_N(type, is_write)                    \
259extern "C" NOINLINE INTERFACE_ATTRIBUTE                        \
260void __asan_report_ ## type ## _n(uptr addr, uptr size);       \
261void __asan_report_ ## type ## _n(uptr addr, uptr size) {      \
262  GET_CALLER_PC_BP_SP;                                         \
263  __asan_report_error(pc, bp, sp, addr, is_write, size);       \
264}
265
266ASAN_REPORT_ERROR_N(load, false)
267ASAN_REPORT_ERROR_N(store, true)
268
269// Force the linker to keep the symbols for various ASan interface functions.
270// We want to keep those in the executable in order to let the instrumented
271// dynamic libraries access the symbol even if it is not used by the executable
272// itself. This should help if the build system is removing dead code at link
273// time.
274static NOINLINE void force_interface_symbols() {
275  volatile int fake_condition = 0;  // prevent dead condition elimination.
276  // __asan_report_* functions are noreturn, so we need a switch to prevent
277  // the compiler from removing any of them.
278  switch (fake_condition) {
279    case 1: __asan_report_load1(0); break;
280    case 2: __asan_report_load2(0); break;
281    case 3: __asan_report_load4(0); break;
282    case 4: __asan_report_load8(0); break;
283    case 5: __asan_report_load16(0); break;
284    case 6: __asan_report_store1(0); break;
285    case 7: __asan_report_store2(0); break;
286    case 8: __asan_report_store4(0); break;
287    case 9: __asan_report_store8(0); break;
288    case 10: __asan_report_store16(0); break;
289    case 12: __asan_register_globals(0, 0); break;
290    case 13: __asan_unregister_globals(0, 0); break;
291    case 14: __asan_set_death_callback(0); break;
292    case 15: __asan_set_error_report_callback(0); break;
293    case 16: __asan_handle_no_return(); break;
294    case 17: __asan_address_is_poisoned(0); break;
295    case 18: __asan_get_allocated_size(0); break;
296    case 19: __asan_get_current_allocated_bytes(); break;
297    case 20: __asan_get_estimated_allocated_size(0); break;
298    case 21: __asan_get_free_bytes(); break;
299    case 22: __asan_get_heap_size(); break;
300    case 23: __asan_get_ownership(0); break;
301    case 24: __asan_get_unmapped_bytes(); break;
302    case 25: __asan_poison_memory_region(0, 0); break;
303    case 26: __asan_unpoison_memory_region(0, 0); break;
304    case 27: __asan_set_error_exit_code(0); break;
305    case 30: __asan_before_dynamic_init(0); break;
306    case 31: __asan_after_dynamic_init(); break;
307    case 32: __asan_poison_stack_memory(0, 0); break;
308    case 33: __asan_unpoison_stack_memory(0, 0); break;
309    case 34: __asan_region_is_poisoned(0, 0); break;
310    case 35: __asan_describe_address(0); break;
311  }
312}
313
314static void asan_atexit() {
315  Printf("AddressSanitizer exit stats:\n");
316  __asan_print_accumulated_stats();
317  // Print AsanMappingProfile.
318  for (uptr i = 0; i < kAsanMappingProfileSize; i++) {
319    if (AsanMappingProfile[i] == 0) continue;
320    Printf("asan_mapping.h:%zd -- %zd\n", i, AsanMappingProfile[i]);
321  }
322}
323
324static void InitializeHighMemEnd() {
325#if !ASAN_FIXED_MAPPING
326  kHighMemEnd = GetMaxVirtualAddress();
327  // Increase kHighMemEnd to make sure it's properly
328  // aligned together with kHighMemBeg:
329  kHighMemEnd |= SHADOW_GRANULARITY * GetPageSizeCached() - 1;
330#endif  // !ASAN_FIXED_MAPPING
331  CHECK_EQ((kHighMemBeg % GetPageSizeCached()), 0);
332}
333
334static void ProtectGap(uptr a, uptr size) {
335  CHECK_EQ(a, (uptr)Mprotect(a, size));
336}
337
338static void PrintAddressSpaceLayout() {
339  Printf("|| `[%p, %p]` || HighMem    ||\n",
340         (void*)kHighMemBeg, (void*)kHighMemEnd);
341  Printf("|| `[%p, %p]` || HighShadow ||\n",
342         (void*)kHighShadowBeg, (void*)kHighShadowEnd);
343  if (kMidMemBeg) {
344    Printf("|| `[%p, %p]` || ShadowGap3 ||\n",
345           (void*)kShadowGap3Beg, (void*)kShadowGap3End);
346    Printf("|| `[%p, %p]` || MidMem     ||\n",
347           (void*)kMidMemBeg, (void*)kMidMemEnd);
348    Printf("|| `[%p, %p]` || ShadowGap2 ||\n",
349           (void*)kShadowGap2Beg, (void*)kShadowGap2End);
350    Printf("|| `[%p, %p]` || MidShadow  ||\n",
351           (void*)kMidShadowBeg, (void*)kMidShadowEnd);
352  }
353  Printf("|| `[%p, %p]` || ShadowGap  ||\n",
354         (void*)kShadowGapBeg, (void*)kShadowGapEnd);
355  if (kLowShadowBeg) {
356    Printf("|| `[%p, %p]` || LowShadow  ||\n",
357           (void*)kLowShadowBeg, (void*)kLowShadowEnd);
358    Printf("|| `[%p, %p]` || LowMem     ||\n",
359           (void*)kLowMemBeg, (void*)kLowMemEnd);
360  }
361  Printf("MemToShadow(shadow): %p %p %p %p",
362         (void*)MEM_TO_SHADOW(kLowShadowBeg),
363         (void*)MEM_TO_SHADOW(kLowShadowEnd),
364         (void*)MEM_TO_SHADOW(kHighShadowBeg),
365         (void*)MEM_TO_SHADOW(kHighShadowEnd));
366  if (kMidMemBeg) {
367    Printf(" %p %p",
368           (void*)MEM_TO_SHADOW(kMidShadowBeg),
369           (void*)MEM_TO_SHADOW(kMidShadowEnd));
370  }
371  Printf("\n");
372  Printf("red_zone=%zu\n", (uptr)flags()->redzone);
373  Printf("quarantine_size=%zuM\n", (uptr)flags()->quarantine_size >> 20);
374  Printf("malloc_context_size=%zu\n",
375         (uptr)common_flags()->malloc_context_size);
376
377  Printf("SHADOW_SCALE: %zx\n", (uptr)SHADOW_SCALE);
378  Printf("SHADOW_GRANULARITY: %zx\n", (uptr)SHADOW_GRANULARITY);
379  Printf("SHADOW_OFFSET: %zx\n", (uptr)SHADOW_OFFSET);
380  CHECK(SHADOW_SCALE >= 3 && SHADOW_SCALE <= 7);
381  if (kMidMemBeg)
382    CHECK(kMidShadowBeg > kLowShadowEnd &&
383          kMidMemBeg > kMidShadowEnd &&
384          kHighShadowBeg > kMidMemEnd);
385}
386
387}  // namespace __asan
388
389// ---------------------- Interface ---------------- {{{1
390using namespace __asan;  // NOLINT
391
392#if !SANITIZER_SUPPORTS_WEAK_HOOKS
393extern "C" {
394SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
395const char* __asan_default_options() { return ""; }
396}  // extern "C"
397#endif
398
399int NOINLINE __asan_set_error_exit_code(int exit_code) {
400  int old = flags()->exitcode;
401  flags()->exitcode = exit_code;
402  return old;
403}
404
405void NOINLINE __asan_handle_no_return() {
406  int local_stack;
407  AsanThread *curr_thread = GetCurrentThread();
408  CHECK(curr_thread);
409  uptr PageSize = GetPageSizeCached();
410  uptr top = curr_thread->stack_top();
411  uptr bottom = ((uptr)&local_stack - PageSize) & ~(PageSize-1);
412  static const uptr kMaxExpectedCleanupSize = 64 << 20;  // 64M
413  if (top - bottom > kMaxExpectedCleanupSize) {
414    static bool reported_warning = false;
415    if (reported_warning)
416      return;
417    reported_warning = true;
418    Report("WARNING: ASan is ignoring requested __asan_handle_no_return: "
419           "stack top: %p; bottom %p; size: %p (%zd)\n"
420           "False positive error reports may follow\n"
421           "For details see "
422           "http://code.google.com/p/address-sanitizer/issues/detail?id=189\n",
423           top, bottom, top - bottom, top - bottom);
424    return;
425  }
426  PoisonShadow(bottom, top - bottom, 0);
427  if (curr_thread->has_fake_stack())
428    curr_thread->fake_stack()->HandleNoReturn();
429}
430
431void NOINLINE __asan_set_death_callback(void (*callback)(void)) {
432  death_callback = callback;
433}
434
435void __asan_init() {
436  if (asan_inited) return;
437  SanitizerToolName = "AddressSanitizer";
438  CHECK(!asan_init_is_running && "ASan init calls itself!");
439  asan_init_is_running = true;
440  InitializeHighMemEnd();
441
442  // Make sure we are not statically linked.
443  AsanDoesNotSupportStaticLinkage();
444
445  // Install tool-specific callbacks in sanitizer_common.
446  SetDieCallback(AsanDie);
447  SetCheckFailedCallback(AsanCheckFailed);
448  SetPrintfAndReportCallback(AppendToErrorMessageBuffer);
449
450  // Initialize flags. This must be done early, because most of the
451  // initialization steps look at flags().
452  const char *options = GetEnv("ASAN_OPTIONS");
453  InitializeFlags(flags(), options);
454  __sanitizer_set_report_path(common_flags()->log_path);
455  __asan_option_detect_stack_use_after_return =
456      flags()->detect_stack_use_after_return;
457
458  if (common_flags()->verbosity && options) {
459    Report("Parsed ASAN_OPTIONS: %s\n", options);
460  }
461
462  // Re-exec ourselves if we need to set additional env or command line args.
463  MaybeReexec();
464
465  // Setup internal allocator callback.
466  SetLowLevelAllocateCallback(OnLowLevelAllocate);
467
468  InitializeAsanInterceptors();
469
470  ReplaceSystemMalloc();
471  ReplaceOperatorsNewAndDelete();
472
473  uptr shadow_start = kLowShadowBeg;
474  if (kLowShadowBeg)
475    shadow_start -= GetMmapGranularity();
476  bool full_shadow_is_available =
477      MemoryRangeIsAvailable(shadow_start, kHighShadowEnd);
478
479#if SANITIZER_LINUX && defined(__x86_64__) && !ASAN_FIXED_MAPPING
480  if (!full_shadow_is_available) {
481    kMidMemBeg = kLowMemEnd < 0x3000000000ULL ? 0x3000000000ULL : 0;
482    kMidMemEnd = kLowMemEnd < 0x3000000000ULL ? 0x4fffffffffULL : 0;
483  }
484#endif
485
486  if (common_flags()->verbosity)
487    PrintAddressSpaceLayout();
488
489  if (flags()->disable_core) {
490    DisableCoreDumper();
491  }
492
493  if (full_shadow_is_available) {
494    // mmap the low shadow plus at least one page at the left.
495    if (kLowShadowBeg)
496      ReserveShadowMemoryRange(shadow_start, kLowShadowEnd);
497    // mmap the high shadow.
498    ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd);
499    // protect the gap.
500    ProtectGap(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1);
501  } else if (kMidMemBeg &&
502      MemoryRangeIsAvailable(shadow_start, kMidMemBeg - 1) &&
503      MemoryRangeIsAvailable(kMidMemEnd + 1, kHighShadowEnd)) {
504    CHECK(kLowShadowBeg != kLowShadowEnd);
505    // mmap the low shadow plus at least one page at the left.
506    ReserveShadowMemoryRange(shadow_start, kLowShadowEnd);
507    // mmap the mid shadow.
508    ReserveShadowMemoryRange(kMidShadowBeg, kMidShadowEnd);
509    // mmap the high shadow.
510    ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd);
511    // protect the gaps.
512    ProtectGap(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1);
513    ProtectGap(kShadowGap2Beg, kShadowGap2End - kShadowGap2Beg + 1);
514    ProtectGap(kShadowGap3Beg, kShadowGap3End - kShadowGap3Beg + 1);
515  } else {
516    Report("Shadow memory range interleaves with an existing memory mapping. "
517           "ASan cannot proceed correctly. ABORTING.\n");
518    DumpProcessMap();
519    Die();
520  }
521
522  AsanTSDInit(PlatformTSDDtor);
523  InstallSignalHandlers();
524
525  // Allocator should be initialized before starting external symbolizer, as
526  // fork() on Mac locks the allocator.
527  InitializeAllocator();
528
529  // Start symbolizer process if necessary.
530  if (common_flags()->symbolize) {
531    Symbolizer::Init(common_flags()->external_symbolizer_path);
532  } else {
533    Symbolizer::Disable();
534  }
535
536  // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited
537  // should be set to 1 prior to initializing the threads.
538  asan_inited = 1;
539  asan_init_is_running = false;
540
541  if (flags()->atexit)
542    Atexit(asan_atexit);
543
544  // interceptors
545  InitTlsSize();
546
547  // Create main thread.
548  AsanThread *main_thread = AsanThread::Create(0, 0);
549  CreateThreadContextArgs create_main_args = { main_thread, 0 };
550  u32 main_tid = asanThreadRegistry().CreateThread(
551      0, true, 0, &create_main_args);
552  CHECK_EQ(0, main_tid);
553  SetCurrentThread(main_thread);
554  main_thread->ThreadStart(internal_getpid());
555  force_interface_symbols();  // no-op.
556
557#if CAN_SANITIZE_LEAKS
558  __lsan::InitCommonLsan();
559  if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit) {
560    Atexit(__lsan::DoLeakCheck);
561  }
562#endif  // CAN_SANITIZE_LEAKS
563
564  if (common_flags()->verbosity) {
565    Report("AddressSanitizer Init done\n");
566  }
567}
568