asan_rtl.cc revision 128892cb26ee50b0fa2171198c7a919540dcd4e7
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===-- asan_rtl.cc -------------------------------------------------------===// 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The LLVM Compiler Infrastructure 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// License. See LICENSE.TXT for details. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 91320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// 10558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch// This file is a part of AddressSanitizer, an address sanity checker. 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 12a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)// Main file of the ASan run-time library. 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 14c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "asan_allocator.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "asan_interceptors.h" 16a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)#include "asan_interface.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "asan_internal.h" 18116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch#include "asan_lock.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "asan_mapping.h" 20a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch#include "asan_report.h" 21d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles)#include "asan_stack.h" 221e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)#include "asan_stats.h" 231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "asan_thread.h" 24868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "asan_thread_registry.h" 25868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "sanitizer_common/sanitizer_atomic.h" 263551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#include "sanitizer_common/sanitizer_flags.h" 273551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#include "sanitizer_common/sanitizer_libc.h" 281320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 295f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles)namespace __sanitizer { 303551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)using namespace __asan; 311320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccivoid Die() { 333551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) static atomic_uint32_t num_calls; 3490dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) { 352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Don't die twice - run a busy loop. 362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (1) { } 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (flags()->sleep_before_dying) { 392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Report("Sleeping for %d second(s)\n", flags()->sleep_before_dying); 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SleepForSeconds(flags()->sleep_before_dying); 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (flags()->unmap_shadow_on_exit) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UnmapOrDie((void*)kLowShadowBeg, kHighShadowEnd - kLowShadowBeg); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (death_callback) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) death_callback(); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (flags()->abort_on_error) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Abort(); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Exit(flags()->exitcode); 49c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 50a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch 51a02191e04bc25c4935f804f2c080ae28663d096dBen MurdochSANITIZER_INTERFACE_ATTRIBUTE 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void CheckFailed(const char *file, int line, const char *cond, u64 v1, u64 v2) { 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) AsanReport("AddressSanitizer CHECK failed: %s:%d \"%s\" (0x%zx, 0x%zx)\n", 54558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch file, line, cond, (uptr)v1, (uptr)v2); 55a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch PRINT_CURRENT_STACK(); 56a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch ShowStatsAndAbort(); 57a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch} 58a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch 59558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch} // namespace __sanitizer 60558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 61558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdochnamespace __asan { 62c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 63c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// -------------------------- Flags ------------------------- {{{1 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const int kMallocContextSize = 30; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 66a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)static Flags asan_flags; 67a02191e04bc25c4935f804f2c080ae28663d096dBen Murdoch 68a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)Flags *flags() { 69a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) return &asan_flags; 70a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)} 71a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 72a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)static void ParseFlagsFromString(Flags *f, const char *str) { 73a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->quarantine_size, "quarantine_size"); 74a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->symbolize, "symbolize"); 75a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->verbosity, "verbosity"); 76a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->redzone, "redzone"); 77a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) CHECK(f->redzone >= 16); 785d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) CHECK(IsPowerOfTwo(f->redzone)); 79a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 80a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->debug, "debug"); 81a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->report_globals, "report_globals"); 82a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->check_initialization_order, "initialization_order"); 83a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->malloc_context_size, "malloc_context_size"); 84a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) CHECK(f->malloc_context_size <= kMallocContextSize); 85a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 86a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->replace_str, "replace_str"); 87a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->replace_intrin, "replace_intrin"); 88a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->replace_cfallocator, "replace_cfallocator"); 89a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->mac_ignore_invalid_free, "mac_ignore_invalid_free"); 90a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->use_fake_stack, "use_fake_stack"); 91a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->max_malloc_fill_size, "max_malloc_fill_size"); 92a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ParseFlag(str, &f->exitcode, "exitcode"); 93c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ParseFlag(str, &f->allow_user_poisoning, "allow_user_poisoning"); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ParseFlag(str, &f->sleep_before_dying, "sleep_before_dying"); 95c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ParseFlag(str, &f->handle_segv, "handle_segv"); 96c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ParseFlag(str, &f->use_sigaltstack, "use_sigaltstack"); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ParseFlag(str, &f->check_malloc_usable_size, "check_malloc_usable_size"); 981320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ParseFlag(str, &f->unmap_shadow_on_exit, "unmap_shadow_on_exit"); 991320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ParseFlag(str, &f->abort_on_error, "abort_on_error"); 1001320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ParseFlag(str, &f->atexit, "atexit"); 1011320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ParseFlag(str, &f->disable_core, "disable_core"); 1021320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ParseFlag(str, &f->strip_path_prefix, "strip_path_prefix"); 1031320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} 104c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 105c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)extern "C" { 106c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)SANITIZER_WEAK_ATTRIBUTE 1072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)SANITIZER_INTERFACE_ATTRIBUTE 1082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const char* __asan_default_options() { return ""; } 109c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} // extern "C" 110c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 111868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)void InitializeFlags(Flags *f, const char *env) { 112868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) internal_memset(f, 0, sizeof(*f)); 1132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) f->quarantine_size = (ASAN_LOW_MEMORY) ? 1UL << 24 : 1UL << 28; 1155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) f->symbolize = false; 1165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) f->verbosity = 0; 117868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->redzone = (ASAN_LOW_MEMORY) ? 64 : 128; 1185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) f->debug = false; 119424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) f->report_globals = 1; 1207d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) f->check_initialization_order = true; 121868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->malloc_context_size = kMallocContextSize; 122868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->replace_str = true; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) f->replace_intrin = true; 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) f->replace_cfallocator = true; 125c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) f->mac_ignore_invalid_free = false; 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) f->use_fake_stack = true; 127868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->max_malloc_fill_size = 0; 128868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->exitcode = ASAN_DEFAULT_FAILURE_EXITCODE; 129868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->allow_user_poisoning = true; 13090dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) f->sleep_before_dying = 0; 1315d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) f->handle_segv = ASAN_NEEDS_SEGV; 1325d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) f->use_sigaltstack = false; 133868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->check_malloc_usable_size = true; 1345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) f->unmap_shadow_on_exit = false; 135424c4d7b64af9d0d8fd9624f381f469654d5e3d2Torne (Richard Coles) f->abort_on_error = false; 1367d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) f->atexit = false; 137868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->disable_core = (__WORDSIZE == 64); 138868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) f->strip_path_prefix = ""; 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Override from user-specified string. 141c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) ParseFlagsFromString(f, __asan_default_options()); 142c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (flags()->verbosity) { 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Report("Using the defaults from __asan_default_options: %s\n", 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __asan_default_options()); 145c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) } 146c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Override from command line. 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ParseFlagsFromString(f, env); 149116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch} 150116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 151a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)// -------------------------- Globals --------------------- {{{1 152a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)int asan_inited; 153116680a4aac90f2aa7413d9095a592090648e557Ben Murdochbool asan_init_is_running; 154116680a4aac90f2aa7413d9095a592090648e557Ben Murdochvoid (*death_callback)(void); 155a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 156a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)// -------------------------- Misc ---------------- {{{1 1573551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)void ShowStatsAndAbort() { 1583551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) __asan_print_accumulated_stats(); 1593551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Die(); 1603551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 162c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// ---------------------- mmap -------------------- {{{1 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Reserve memory range [beg, end]. 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void ReserveShadowMemoryRange(uptr beg, uptr end) { 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK((beg % kPageSize) == 0); 166c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CHECK(((end + 1) % kPageSize) == 0); 167c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) uptr size = end - beg + 1; 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void *res = MmapFixedNoReserve(beg, size); 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(res == (void*)beg && "ReserveShadowMemoryRange failed"); 170c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 171c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 172f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)// ---------------------- LowLevelAllocator ------------- {{{1 173c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)void *LowLevelAllocator::Allocate(uptr size) { 174c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) CHECK((size & (size - 1)) == 0 && "size must be a power of two"); 175c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (allocated_end_ - allocated_current_ < (sptr)size) { 176f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) uptr size_to_allocate = Max(size, kPageSize); 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) allocated_current_ = 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (char*)MmapOrDie(size_to_allocate, __FUNCTION__); 179c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) allocated_end_ = allocated_current_ + size_to_allocate; 180c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) PoisonShadow((uptr)allocated_current_, size_to_allocate, 181c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) kAsanInternalHeapMagic); 182f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(allocated_end_ - allocated_current_ >= (sptr)size); 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void *res = allocated_current_; 185c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) allocated_current_ += size; 186f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) return res; 187c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// -------------------------- Run-time entry ------------------- {{{1 190c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// exported functions 191c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#define ASAN_REPORT_ERROR(type, is_write, size) \ 192f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)extern "C" NOINLINE INTERFACE_ATTRIBUTE \ 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void __asan_report_ ## type ## size(uptr addr); \ 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void __asan_report_ ## type ## size(uptr addr) { \ 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GET_CALLER_PC_BP_SP; \ 196c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) __asan_report_error(pc, bp, sp, addr, is_write, size); \ 197c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ASAN_REPORT_ERROR(load, false, 1) 200c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)ASAN_REPORT_ERROR(load, false, 2) 201c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)ASAN_REPORT_ERROR(load, false, 4) 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ASAN_REPORT_ERROR(load, false, 8) 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ASAN_REPORT_ERROR(load, false, 16) 204c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)ASAN_REPORT_ERROR(store, true, 1) 205c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)ASAN_REPORT_ERROR(store, true, 2) 206c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)ASAN_REPORT_ERROR(store, true, 4) 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ASAN_REPORT_ERROR(store, true, 8) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ASAN_REPORT_ERROR(store, true, 16) 209c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 210c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Force the linker to keep the symbols for various ASan interface functions. 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We want to keep those in the executable in order to let the instrumented 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// dynamic libraries access the symbol even if it is not used by the executable 213c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// itself. This should help if the build system is removing dead code at link 214c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// time. 215a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)static NOINLINE void force_interface_symbols() { 216a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) volatile int fake_condition = 0; // prevent dead condition elimination. 217a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // __asan_report_* functions are noreturn, so we need a switch to prevent 218a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) // the compiler from removing any of them. 219a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) switch (fake_condition) { 220a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) case 1: __asan_report_load1(0); break; 221a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) case 2: __asan_report_load2(0); break; 222a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) case 3: __asan_report_load4(0); break; 223a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) case 4: __asan_report_load8(0); break; 224a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) case 5: __asan_report_load16(0); break; 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 6: __asan_report_store1(0); break; 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 7: __asan_report_store2(0); break; 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 8: __asan_report_store4(0); break; 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 9: __asan_report_store8(0); break; 2292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case 10: __asan_report_store16(0); break; 230c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 11: __asan_register_global(0, 0, 0); break; 231c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 12: __asan_register_globals(0, 0); break; 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 13: __asan_unregister_globals(0, 0); break; 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 14: __asan_set_death_callback(0); break; 234c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 15: __asan_set_error_report_callback(0); break; 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 16: __asan_handle_no_return(); break; 2362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case 17: __asan_address_is_poisoned(0); break; 237c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 18: __asan_get_allocated_size(0); break; 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 19: __asan_get_current_allocated_bytes(); break; 239c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 20: __asan_get_estimated_allocated_size(0); break; 2402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case 21: __asan_get_free_bytes(); break; 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 22: __asan_get_heap_size(); break; 242c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 23: __asan_get_ownership(0); break; 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 24: __asan_get_unmapped_bytes(); break; 244c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 25: __asan_poison_memory_region(0, 0); break; 245c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 26: __asan_unpoison_memory_region(0, 0); break; 246c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 27: __asan_set_error_exit_code(0); break; 247c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 28: __asan_stack_free(0, 0, 0); break; 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 29: __asan_stack_malloc(0, 0); break; 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 30: __asan_set_on_error_callback(0); break; 250c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 31: __asan_default_options(); break; 251c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) case 32: __asan_before_dynamic_init(0, 0); break; 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case 33: __asan_after_dynamic_init(); break; 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 254c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static void asan_atexit() { 257c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) AsanPrintf("AddressSanitizer exit stats:\n"); 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) __asan_print_accumulated_stats(); 259a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles)} 260c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace __asan 262c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 2637dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch// ---------------------- Interface ---------------- {{{1 2647dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochusing namespace __asan; // NOLINT 2657dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int NOINLINE __asan_set_error_exit_code(int exit_code) { 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int old = flags()->exitcode; 268558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch flags()->exitcode = exit_code; 269558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch return old; 270558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch} 271a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 272558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdochvoid NOINLINE __asan_handle_no_return() { 273558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch int local_stack; 274a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) AsanThread *curr_thread = asanThreadRegistry().GetCurrent(); 275a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) CHECK(curr_thread); 276558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch uptr top = curr_thread->stack_top(); 277558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch uptr bottom = ((uptr)&local_stack - kPageSize) & ~(kPageSize-1); 278558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch PoisonShadow(bottom, top - bottom, 0); 279558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch} 280558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 281558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdochvoid NOINLINE __asan_set_death_callback(void (*callback)(void)) { 282558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch death_callback = callback; 283558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch} 284558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 285558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdochvoid __asan_init() { 286558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch if (asan_inited) return; 287558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch asan_init_is_running = true; 288558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 289558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch // Make sure we are not statically linked. 290558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch AsanDoesNotSupportStaticLinkage(); 291558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 292558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch // Initialize flags. 293558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch const char *options = GetEnv("ASAN_OPTIONS"); 294558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch InitializeFlags(flags(), options); 295558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 296558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch if (flags()->verbosity && options) { 297558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch Report("Parsed ASAN_OPTIONS: %s\n", options); 298558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch } 299558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 300c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch if (flags()->atexit) { 301558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch Atexit(asan_atexit); 302c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch } 303558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 304558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch // interceptors 305558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch InitializeAsanInterceptors(); 306558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 307c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch ReplaceSystemMalloc(); 308558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch ReplaceOperatorsNewAndDelete(); 309558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch 310558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch if (flags()->verbosity) { 311558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch Printf("|| `[%p, %p]` || HighMem ||\n", 312558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch (void*)kHighMemBeg, (void*)kHighMemEnd); 313558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch Printf("|| `[%p, %p]` || HighShadow ||\n", 314558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch (void*)kHighShadowBeg, (void*)kHighShadowEnd); 315a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("|| `[%p, %p]` || ShadowGap ||\n", 316a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) (void*)kShadowGapBeg, (void*)kShadowGapEnd); 317a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("|| `[%p, %p]` || LowShadow ||\n", 318a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) (void*)kLowShadowBeg, (void*)kLowShadowEnd); 319a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("|| `[%p, %p]` || LowMem ||\n", 3203551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) (void*)kLowMemBeg, (void*)kLowMemEnd); 3213551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Printf("MemToShadow(shadow): %p %p %p %p\n", 322a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) (void*)MEM_TO_SHADOW(kLowShadowBeg), 323a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) (void*)MEM_TO_SHADOW(kLowShadowEnd), 3243551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) (void*)MEM_TO_SHADOW(kHighShadowBeg), 3253551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) (void*)MEM_TO_SHADOW(kHighShadowEnd)); 326a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("red_zone=%zu\n", (uptr)flags()->redzone); 327a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("malloc_context_size=%zu\n", (uptr)flags()->malloc_context_size); 328a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 329a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("SHADOW_SCALE: %zx\n", (uptr)SHADOW_SCALE); 330a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("SHADOW_GRANULARITY: %zx\n", (uptr)SHADOW_GRANULARITY); 331a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Printf("SHADOW_OFFSET: %zx\n", (uptr)SHADOW_OFFSET); 332a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) CHECK(SHADOW_SCALE >= 3 && SHADOW_SCALE <= 7); 333a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 334116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch 335a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) if (flags()->disable_core) { 336a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) DisableCoreDumper(); 337a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 338a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 339a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) uptr shadow_start = kLowShadowBeg; 340116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch if (kLowShadowBeg > 0) shadow_start -= kMmapGranularity; 341116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch uptr shadow_end = kHighShadowEnd; 342a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) if (MemoryRangeIsAvailable(shadow_start, shadow_end)) { 343a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) if (kLowShadowBeg != kLowShadowEnd) { 344a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) // mmap the low shadow plus at least one page. 345a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) ReserveShadowMemoryRange(kLowShadowBeg - kMmapGranularity, kLowShadowEnd); 346a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 347116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // mmap the high shadow. 348116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch ReserveShadowMemoryRange(kHighShadowBeg, kHighShadowEnd); 349116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // protect the gap 350a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) void *prot = Mprotect(kShadowGapBeg, kShadowGapEnd - kShadowGapBeg + 1); 351a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) CHECK(prot == (void*)kShadowGapBeg); 352a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } else { 353a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) Report("Shadow memory range interleaves with an existing memory mapping. " 354116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch "ASan cannot proceed correctly. ABORTING.\n"); 355116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch DumpProcessMap(); 356116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch Die(); 357a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 3583551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 359a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) InstallSignalHandlers(); 360a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 361116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited 362a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) // should be set to 1 prior to initializing the threads. 363a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) asan_inited = 1; 3643551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) asan_init_is_running = false; 365a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 3663551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) asanThreadRegistry().Init(); 367116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch asanThreadRegistry().GetMain()->ThreadStart(); 368a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) force_interface_symbols(); // no-op. 3693551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 3703551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) if (flags()->verbosity) { 3713551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) Report("AddressSanitizer Init done\n"); 372c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch } 3733551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)} 3743551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 3753551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#if defined(ASAN_USE_PREINIT_ARRAY) 3763551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // On Linux, we force __asan_init to be called before anyone else 377116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // by placing it into .preinit_array section. 378116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // FIXME: do we have anything like this on Mac? 3793551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) __attribute__((section(".preinit_array"))) 3803551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) typeof(__asan_init) *__asan_preinit =__asan_init; 3813551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#elif defined(_WIN32) && defined(_DLL) 3823551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // On Windows, when using dynamic CRT (/MD), we can put a pointer 383116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // to __asan_init into the global list of C initializers. 384116680a4aac90f2aa7413d9095a592090648e557Ben Murdoch // See crt0dat.c in the CRT sources for the details. 3853551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) #pragma section(".CRT$XIB", long, read) // NOLINT 3863551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) __declspec(allocate(".CRT$XIB")) void (*__asan_preinit)() = __asan_init; 3873551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)#endif 3883551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)