ydb-oss sync: add clang16-rt/ to additionalPathsToCopy

1 files changed, 621 insertions, 0 deletions

diff --git a/contrib/libs/clang16-rt/lib/asan/asan_rtl.cpp b/contrib/libs/clang16-rt/lib/asan/asan_rtl.cpp
new file mode 100644
index 0000000000..853083182b
--- /dev/null
+++ b/contrib/libs/clang16-rt/lib/asan/asan_rtl.cpp
@@ -0,0 +1,621 @@
+//===-- asan_rtl.cpp ------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// Main file of the ASan run-time library.
+//===----------------------------------------------------------------------===//
+
+#include "asan_activation.h"
+#include "asan_allocator.h"
+#include "asan_fake_stack.h"
+#include "asan_interceptors.h"
+#include "asan_interface_internal.h"
+#include "asan_internal.h"
+#include "asan_mapping.h"
+#include "asan_poisoning.h"
+#include "asan_report.h"
+#include "asan_stack.h"
+#include "asan_stats.h"
+#include "asan_suppressions.h"
+#include "asan_thread.h"
+#include "lsan/lsan_common.h"
+#include "sanitizer_common/sanitizer_atomic.h"
+#include "sanitizer_common/sanitizer_flags.h"
+#include "sanitizer_common/sanitizer_interface_internal.h"
+#include "sanitizer_common/sanitizer_libc.h"
+#include "sanitizer_common/sanitizer_symbolizer.h"
+#include "ubsan/ubsan_init.h"
+#include "ubsan/ubsan_platform.h"
+
+uptr __asan_shadow_memory_dynamic_address;  // Global interface symbol.
+int __asan_option_detect_stack_use_after_return;  // Global interface symbol.
+uptr *__asan_test_only_reported_buggy_pointer;  // Used only for testing asan.
+
+namespace __asan {
+
+uptr AsanMappingProfile[kAsanMappingProfileSize];
+
+static void AsanDie() {
+  static atomic_uint32_t num_calls;
+  if (atomic_fetch_add(&num_calls, 1, memory_order_relaxed) != 0) {
+    // Don't die twice - run a busy loop.
+    while (1) {
+      internal_sched_yield();
+    }
+  }
+  if (common_flags()->print_module_map >= 1)
+    DumpProcessMap();
+
+  WaitForDebugger(flags()->sleep_before_dying, "before dying");
+
+  if (flags()->unmap_shadow_on_exit) {
+    if (kMidMemBeg) {
+      UnmapOrDie((void*)kLowShadowBeg, kMidMemBeg - kLowShadowBeg);
+      UnmapOrDie((void*)kMidMemEnd, kHighShadowEnd - kMidMemEnd);
+    } else {
+      if (kHighShadowEnd)
+        UnmapOrDie((void*)kLowShadowBeg, kHighShadowEnd - kLowShadowBeg);
+    }
+  }
+}
+
+static void CheckUnwind() {
+  GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_check);
+  stack.Print();
+}
+
+// -------------------------- Globals --------------------- {{{1
+int asan_inited;
+bool asan_init_is_running;
+bool replace_intrin_cached;
+
+#if !ASAN_FIXED_MAPPING
+uptr kHighMemEnd, kMidMemBeg, kMidMemEnd;
+#endif
+
+// -------------------------- Misc ---------------- {{{1
+void ShowStatsAndAbort() {
+  __asan_print_accumulated_stats();
+  Die();
+}
+
+NOINLINE
+static void ReportGenericErrorWrapper(uptr addr, bool is_write, int size,
+                                      int exp_arg, bool fatal) {
+  GET_CALLER_PC_BP_SP;
+  ReportGenericError(pc, bp, sp, addr, is_write, size, exp_arg, fatal);
+}
+
+// --------------- LowLevelAllocateCallbac ---------- {{{1
+static void OnLowLevelAllocate(uptr ptr, uptr size) {
+  PoisonShadow(ptr, size, kAsanInternalHeapMagic);
+}
+
+// -------------------------- Run-time entry ------------------- {{{1
+// exported functions
+#define ASAN_REPORT_ERROR(type, is_write, size)                     \
+extern "C" NOINLINE INTERFACE_ATTRIBUTE                             \
+void __asan_report_ ## type ## size(uptr addr) {                    \
+  GET_CALLER_PC_BP_SP;                                              \
+  ReportGenericError(pc, bp, sp, addr, is_write, size, 0, true);    \
+}                                                                   \
+extern "C" NOINLINE INTERFACE_ATTRIBUTE                             \
+void __asan_report_exp_ ## type ## size(uptr addr, u32 exp) {       \
+  GET_CALLER_PC_BP_SP;                                              \
+  ReportGenericError(pc, bp, sp, addr, is_write, size, exp, true);  \
+}                                                                   \
+extern "C" NOINLINE INTERFACE_ATTRIBUTE                             \
+void __asan_report_ ## type ## size ## _noabort(uptr addr) {        \
+  GET_CALLER_PC_BP_SP;                                              \
+  ReportGenericError(pc, bp, sp, addr, is_write, size, 0, false);   \
+}                                                                   \
+
+ASAN_REPORT_ERROR(load, false, 1)
+ASAN_REPORT_ERROR(load, false, 2)
+ASAN_REPORT_ERROR(load, false, 4)
+ASAN_REPORT_ERROR(load, false, 8)
+ASAN_REPORT_ERROR(load, false, 16)
+ASAN_REPORT_ERROR(store, true, 1)
+ASAN_REPORT_ERROR(store, true, 2)
+ASAN_REPORT_ERROR(store, true, 4)
+ASAN_REPORT_ERROR(store, true, 8)
+ASAN_REPORT_ERROR(store, true, 16)
+
+#define ASAN_REPORT_ERROR_N(type, is_write)                                 \
+extern "C" NOINLINE INTERFACE_ATTRIBUTE                                     \
+void __asan_report_ ## type ## _n(uptr addr, uptr size) {                   \
+  GET_CALLER_PC_BP_SP;                                                      \
+  ReportGenericError(pc, bp, sp, addr, is_write, size, 0, true);            \
+}                                                                           \
+extern "C" NOINLINE INTERFACE_ATTRIBUTE                                     \
+void __asan_report_exp_ ## type ## _n(uptr addr, uptr size, u32 exp) {      \
+  GET_CALLER_PC_BP_SP;                                                      \
+  ReportGenericError(pc, bp, sp, addr, is_write, size, exp, true);          \
+}                                                                           \
+extern "C" NOINLINE INTERFACE_ATTRIBUTE                                     \
+void __asan_report_ ## type ## _n_noabort(uptr addr, uptr size) {           \
+  GET_CALLER_PC_BP_SP;                                                      \
+  ReportGenericError(pc, bp, sp, addr, is_write, size, 0, false);           \
+}                                                                           \
+
+ASAN_REPORT_ERROR_N(load, false)
+ASAN_REPORT_ERROR_N(store, true)
+
+#define ASAN_MEMORY_ACCESS_CALLBACK_BODY(type, is_write, size, exp_arg, fatal) \
+  uptr sp = MEM_TO_SHADOW(addr);                                               \
+  uptr s = size <= ASAN_SHADOW_GRANULARITY ? *reinterpret_cast<u8 *>(sp)       \
+                                           : *reinterpret_cast<u16 *>(sp);     \
+  if (UNLIKELY(s)) {                                                           \
+    if (UNLIKELY(size >= ASAN_SHADOW_GRANULARITY ||                            \
+                 ((s8)((addr & (ASAN_SHADOW_GRANULARITY - 1)) + size - 1)) >=  \
+                     (s8)s)) {                                                 \
+      ReportGenericErrorWrapper(addr, is_write, size, exp_arg, fatal);         \
+    }                                                                          \
+  }
+
+#define ASAN_MEMORY_ACCESS_CALLBACK(type, is_write, size)                      \
+  extern "C" NOINLINE INTERFACE_ATTRIBUTE                                      \
+  void __asan_##type##size(uptr addr) {                                        \
+    ASAN_MEMORY_ACCESS_CALLBACK_BODY(type, is_write, size, 0, true)            \
+  }                                                                            \
+  extern "C" NOINLINE INTERFACE_ATTRIBUTE                                      \
+  void __asan_exp_##type##size(uptr addr, u32 exp) {                           \
+    ASAN_MEMORY_ACCESS_CALLBACK_BODY(type, is_write, size, exp, true)          \
+  }                                                                            \
+  extern "C" NOINLINE INTERFACE_ATTRIBUTE                                      \
+  void __asan_##type##size ## _noabort(uptr addr) {                            \
+    ASAN_MEMORY_ACCESS_CALLBACK_BODY(type, is_write, size, 0, false)           \
+  }                                                                            \
+
+ASAN_MEMORY_ACCESS_CALLBACK(load, false, 1)
+ASAN_MEMORY_ACCESS_CALLBACK(load, false, 2)
+ASAN_MEMORY_ACCESS_CALLBACK(load, false, 4)
+ASAN_MEMORY_ACCESS_CALLBACK(load, false, 8)
+ASAN_MEMORY_ACCESS_CALLBACK(load, false, 16)
+ASAN_MEMORY_ACCESS_CALLBACK(store, true, 1)
+ASAN_MEMORY_ACCESS_CALLBACK(store, true, 2)
+ASAN_MEMORY_ACCESS_CALLBACK(store, true, 4)
+ASAN_MEMORY_ACCESS_CALLBACK(store, true, 8)
+ASAN_MEMORY_ACCESS_CALLBACK(store, true, 16)
+
+extern "C"
+NOINLINE INTERFACE_ATTRIBUTE
+void __asan_loadN(uptr addr, uptr size) {
+  if ((addr = __asan_region_is_poisoned(addr, size))) {
+    GET_CALLER_PC_BP_SP;
+    ReportGenericError(pc, bp, sp, addr, false, size, 0, true);
+  }
+}
+
+extern "C"
+NOINLINE INTERFACE_ATTRIBUTE
+void __asan_exp_loadN(uptr addr, uptr size, u32 exp) {
+  if ((addr = __asan_region_is_poisoned(addr, size))) {
+    GET_CALLER_PC_BP_SP;
+    ReportGenericError(pc, bp, sp, addr, false, size, exp, true);
+  }
+}
+
+extern "C"
+NOINLINE INTERFACE_ATTRIBUTE
+void __asan_loadN_noabort(uptr addr, uptr size) {
+  if ((addr = __asan_region_is_poisoned(addr, size))) {
+    GET_CALLER_PC_BP_SP;
+    ReportGenericError(pc, bp, sp, addr, false, size, 0, false);
+  }
+}
+
+extern "C"
+NOINLINE INTERFACE_ATTRIBUTE
+void __asan_storeN(uptr addr, uptr size) {
+  if ((addr = __asan_region_is_poisoned(addr, size))) {
+    GET_CALLER_PC_BP_SP;
+    ReportGenericError(pc, bp, sp, addr, true, size, 0, true);
+  }
+}
+
+extern "C"
+NOINLINE INTERFACE_ATTRIBUTE
+void __asan_exp_storeN(uptr addr, uptr size, u32 exp) {
+  if ((addr = __asan_region_is_poisoned(addr, size))) {
+    GET_CALLER_PC_BP_SP;
+    ReportGenericError(pc, bp, sp, addr, true, size, exp, true);
+  }
+}
+
+extern "C"
+NOINLINE INTERFACE_ATTRIBUTE
+void __asan_storeN_noabort(uptr addr, uptr size) {
+  if ((addr = __asan_region_is_poisoned(addr, size))) {
+    GET_CALLER_PC_BP_SP;
+    ReportGenericError(pc, bp, sp, addr, true, size, 0, false);
+  }
+}
+
+// Force the linker to keep the symbols for various ASan interface functions.
+// We want to keep those in the executable in order to let the instrumented
+// dynamic libraries access the symbol even if it is not used by the executable
+// itself. This should help if the build system is removing dead code at link
+// time.
+static NOINLINE void force_interface_symbols() {
+  volatile int fake_condition = 0;  // prevent dead condition elimination.
+  // __asan_report_* functions are noreturn, so we need a switch to prevent
+  // the compiler from removing any of them.
+  // clang-format off
+  switch (fake_condition) {
+    case 1: __asan_report_load1(0); break;
+    case 2: __asan_report_load2(0); break;
+    case 3: __asan_report_load4(0); break;
+    case 4: __asan_report_load8(0); break;
+    case 5: __asan_report_load16(0); break;
+    case 6: __asan_report_load_n(0, 0); break;
+    case 7: __asan_report_store1(0); break;
+    case 8: __asan_report_store2(0); break;
+    case 9: __asan_report_store4(0); break;
+    case 10: __asan_report_store8(0); break;
+    case 11: __asan_report_store16(0); break;
+    case 12: __asan_report_store_n(0, 0); break;
+    case 13: __asan_report_exp_load1(0, 0); break;
+    case 14: __asan_report_exp_load2(0, 0); break;
+    case 15: __asan_report_exp_load4(0, 0); break;
+    case 16: __asan_report_exp_load8(0, 0); break;
+    case 17: __asan_report_exp_load16(0, 0); break;
+    case 18: __asan_report_exp_load_n(0, 0, 0); break;
+    case 19: __asan_report_exp_store1(0, 0); break;
+    case 20: __asan_report_exp_store2(0, 0); break;
+    case 21: __asan_report_exp_store4(0, 0); break;
+    case 22: __asan_report_exp_store8(0, 0); break;
+    case 23: __asan_report_exp_store16(0, 0); break;
+    case 24: __asan_report_exp_store_n(0, 0, 0); break;
+    case 25: __asan_register_globals(nullptr, 0); break;
+    case 26: __asan_unregister_globals(nullptr, 0); break;
+    case 27: __asan_set_death_callback(nullptr); break;
+    case 28: __asan_set_error_report_callback(nullptr); break;
+    case 29: __asan_handle_no_return(); break;
+    case 30: __asan_address_is_poisoned(nullptr); break;
+    case 31: __asan_poison_memory_region(nullptr, 0); break;
+    case 32: __asan_unpoison_memory_region(nullptr, 0); break;
+    case 34: __asan_before_dynamic_init(nullptr); break;
+    case 35: __asan_after_dynamic_init(); break;
+    case 36: __asan_poison_stack_memory(0, 0); break;
+    case 37: __asan_unpoison_stack_memory(0, 0); break;
+    case 38: __asan_region_is_poisoned(0, 0); break;
+    case 39: __asan_describe_address(0); break;
+    case 40: __asan_set_shadow_00(0, 0); break;
+    case 41: __asan_set_shadow_01(0, 0); break;
+    case 42: __asan_set_shadow_02(0, 0); break;
+    case 43: __asan_set_shadow_03(0, 0); break;
+    case 44: __asan_set_shadow_04(0, 0); break;
+    case 45: __asan_set_shadow_05(0, 0); break;
+    case 46: __asan_set_shadow_06(0, 0); break;
+    case 47: __asan_set_shadow_07(0, 0); break;
+    case 48: __asan_set_shadow_f1(0, 0); break;
+    case 49: __asan_set_shadow_f2(0, 0); break;
+    case 50: __asan_set_shadow_f3(0, 0); break;
+    case 51: __asan_set_shadow_f5(0, 0); break;
+    case 52: __asan_set_shadow_f8(0, 0); break;
+  }
+  // clang-format on
+}
+
+static void asan_atexit() {
+  Printf("AddressSanitizer exit stats:\n");
+  __asan_print_accumulated_stats();
+  // Print AsanMappingProfile.
+  for (uptr i = 0; i < kAsanMappingProfileSize; i++) {
+    if (AsanMappingProfile[i] == 0) continue;
+    Printf("asan_mapping.h:%zd -- %zd\n", i, AsanMappingProfile[i]);
+  }
+}
+
+static void InitializeHighMemEnd() {
+#if !ASAN_FIXED_MAPPING
+  kHighMemEnd = GetMaxUserVirtualAddress();
+  // Increase kHighMemEnd to make sure it's properly
+  // aligned together with kHighMemBeg:
+  kHighMemEnd |= (GetMmapGranularity() << ASAN_SHADOW_SCALE) - 1;
+#endif  // !ASAN_FIXED_MAPPING
+  CHECK_EQ((kHighMemBeg % GetMmapGranularity()), 0);
+}
+
+void PrintAddressSpaceLayout() {
+  if (kHighMemBeg) {
+    Printf("|| `[%p, %p]` || HighMem    ||\n",
+           (void*)kHighMemBeg, (void*)kHighMemEnd);
+    Printf("|| `[%p, %p]` || HighShadow ||\n",
+           (void*)kHighShadowBeg, (void*)kHighShadowEnd);
+  }
+  if (kMidMemBeg) {
+    Printf("|| `[%p, %p]` || ShadowGap3 ||\n",
+           (void*)kShadowGap3Beg, (void*)kShadowGap3End);
+    Printf("|| `[%p, %p]` || MidMem     ||\n",
+           (void*)kMidMemBeg, (void*)kMidMemEnd);
+    Printf("|| `[%p, %p]` || ShadowGap2 ||\n",
+           (void*)kShadowGap2Beg, (void*)kShadowGap2End);
+    Printf("|| `[%p, %p]` || MidShadow  ||\n",
+           (void*)kMidShadowBeg, (void*)kMidShadowEnd);
+  }
+  Printf("|| `[%p, %p]` || ShadowGap  ||\n",
+         (void*)kShadowGapBeg, (void*)kShadowGapEnd);
+  if (kLowShadowBeg) {
+    Printf("|| `[%p, %p]` || LowShadow  ||\n",
+           (void*)kLowShadowBeg, (void*)kLowShadowEnd);
+    Printf("|| `[%p, %p]` || LowMem     ||\n",
+           (void*)kLowMemBeg, (void*)kLowMemEnd);
+  }
+  Printf("MemToShadow(shadow): %p %p",
+         (void*)MEM_TO_SHADOW(kLowShadowBeg),
+         (void*)MEM_TO_SHADOW(kLowShadowEnd));
+  if (kHighMemBeg) {
+    Printf(" %p %p",
+           (void*)MEM_TO_SHADOW(kHighShadowBeg),
+           (void*)MEM_TO_SHADOW(kHighShadowEnd));
+  }
+  if (kMidMemBeg) {
+    Printf(" %p %p",
+           (void*)MEM_TO_SHADOW(kMidShadowBeg),
+           (void*)MEM_TO_SHADOW(kMidShadowEnd));
+  }
+  Printf("\n");
+  Printf("redzone=%zu\n", (uptr)flags()->redzone);
+  Printf("max_redzone=%zu\n", (uptr)flags()->max_redzone);
+  Printf("quarantine_size_mb=%zuM\n", (uptr)flags()->quarantine_size_mb);
+  Printf("thread_local_quarantine_size_kb=%zuK\n",
+         (uptr)flags()->thread_local_quarantine_size_kb);
+  Printf("malloc_context_size=%zu\n",
+         (uptr)common_flags()->malloc_context_size);
+
+  Printf("SHADOW_SCALE: %d\n", (int)ASAN_SHADOW_SCALE);
+  Printf("SHADOW_GRANULARITY: %d\n", (int)ASAN_SHADOW_GRANULARITY);
+  Printf("SHADOW_OFFSET: 0x%zx\n", (uptr)ASAN_SHADOW_OFFSET);
+  CHECK(ASAN_SHADOW_SCALE >= 3 && ASAN_SHADOW_SCALE <= 7);
+  if (kMidMemBeg)
+    CHECK(kMidShadowBeg > kLowShadowEnd &&
+          kMidMemBeg > kMidShadowEnd &&
+          kHighShadowBeg > kMidMemEnd);
+}
+
+static void AsanInitInternal() {
+  if (LIKELY(asan_inited)) return;
+  SanitizerToolName = "AddressSanitizer";
+  CHECK(!asan_init_is_running && "ASan init calls itself!");
+  asan_init_is_running = true;
+
+  CacheBinaryName();
+
+  // Initialize flags. This must be done early, because most of the
+  // initialization steps look at flags().
+  InitializeFlags();
+
+  WaitForDebugger(flags()->sleep_before_init, "before init");
+
+  // Stop performing init at this point if we are being loaded via
+  // dlopen() and the platform supports it.
+  if (SANITIZER_SUPPORTS_INIT_FOR_DLOPEN && UNLIKELY(HandleDlopenInit())) {
+    asan_init_is_running = false;
+    VReport(1, "AddressSanitizer init is being performed for dlopen().\n");
+    return;
+  }
+
+  AsanCheckIncompatibleRT();
+  AsanCheckDynamicRTPrereqs();
+  AvoidCVE_2016_2143();
+
+  SetCanPoisonMemory(flags()->poison_heap);
+  SetMallocContextSize(common_flags()->malloc_context_size);
+
+  InitializePlatformExceptionHandlers();
+
+  InitializeHighMemEnd();
+
+  // Make sure we are not statically linked.
+  AsanDoesNotSupportStaticLinkage();
+
+  // Install tool-specific callbacks in sanitizer_common.
+  AddDieCallback(AsanDie);
+  SetCheckUnwindCallback(CheckUnwind);
+  SetPrintfAndReportCallback(AppendToErrorMessageBuffer);
+
+  __sanitizer_set_report_path(common_flags()->log_path);
+
+  __asan_option_detect_stack_use_after_return =
+      flags()->detect_stack_use_after_return;
+
+  __sanitizer::InitializePlatformEarly();
+
+  // Setup internal allocator callback.
+  SetLowLevelAllocateMinAlignment(ASAN_SHADOW_GRANULARITY);
+  SetLowLevelAllocateCallback(OnLowLevelAllocate);
+
+  InitializeAsanInterceptors();
+  CheckASLR();
+
+  // Enable system log ("adb logcat") on Android.
+  // Doing this before interceptors are initialized crashes in:
+  // AsanInitInternal -> android_log_write -> __interceptor_strcmp
+  AndroidLogInit();
+
+  ReplaceSystemMalloc();
+
+  DisableCoreDumperIfNecessary();
+
+  InitializeShadowMemory();
+
+  AsanTSDInit(PlatformTSDDtor);
+  InstallDeadlySignalHandlers(AsanOnDeadlySignal);
+
+  AllocatorOptions allocator_options;
+  allocator_options.SetFrom(flags(), common_flags());
+  InitializeAllocator(allocator_options);
+
+  if (SANITIZER_START_BACKGROUND_THREAD_IN_ASAN_INTERNAL)
+    MaybeStartBackgroudThread();
+
+  // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited
+  // should be set to 1 prior to initializing the threads.
+  replace_intrin_cached = flags()->replace_intrin;
+  asan_inited = 1;
+  asan_init_is_running = false;
+
+  if (flags()->atexit)
+    Atexit(asan_atexit);
+
+  InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
+
+  // Now that ASan runtime is (mostly) initialized, deactivate it if
+  // necessary, so that it can be re-activated when requested.
+  if (flags()->start_deactivated)
+    AsanDeactivate();
+
+  // interceptors
+  InitTlsSize();
+
+  // Create main thread.
+  AsanThread *main_thread = CreateMainThread();
+  CHECK_EQ(0, main_thread->tid());
+  force_interface_symbols();  // no-op.
+  SanitizerInitializeUnwinder();
+
+  if (CAN_SANITIZE_LEAKS) {
+    __lsan::InitCommonLsan();
+    InstallAtExitCheckLeaks();
+  }
+
+#if CAN_SANITIZE_UB
+  __ubsan::InitAsPlugin();
+#endif
+
+  InitializeSuppressions();
+
+  if (CAN_SANITIZE_LEAKS) {
+    // LateInitialize() calls dlsym, which can allocate an error string buffer
+    // in the TLS.  Let's ignore the allocation to avoid reporting a leak.
+    __lsan::ScopedInterceptorDisabler disabler;
+    Symbolizer::LateInitialize();
+  } else {
+    Symbolizer::LateInitialize();
+  }
+
+  VReport(1, "AddressSanitizer Init done\n");
+
+  WaitForDebugger(flags()->sleep_after_init, "after init");
+}
+
+// Initialize as requested from some part of ASan runtime library (interceptors,
+// allocator, etc).
+void AsanInitFromRtl() {
+  AsanInitInternal();
+}
+
+#if ASAN_DYNAMIC
+// Initialize runtime in case it's LD_PRELOAD-ed into unsanitized executable
+// (and thus normal initializers from .preinit_array or modules haven't run).
+
+class AsanInitializer {
+ public:
+  AsanInitializer() {
+    AsanInitFromRtl();
+  }
+};
+
+static AsanInitializer asan_initializer;
+#endif  // ASAN_DYNAMIC
+
+void UnpoisonStack(uptr bottom, uptr top, const char *type) {
+  static const uptr kMaxExpectedCleanupSize = 64 << 20;  // 64M
+  if (top - bottom > kMaxExpectedCleanupSize) {
+    static bool reported_warning = false;
+    if (reported_warning)
+      return;
+    reported_warning = true;
+    Report(
+        "WARNING: ASan is ignoring requested __asan_handle_no_return: "
+        "stack type: %s top: %p; bottom %p; size: %p (%zd)\n"
+        "False positive error reports may follow\n"
+        "For details see "
+        "https://github.com/google/sanitizers/issues/189\n",
+        type, (void *)top, (void *)bottom, (void *)(top - bottom),
+        top - bottom);
+    return;
+  }
+  PoisonShadow(bottom, RoundUpTo(top - bottom, ASAN_SHADOW_GRANULARITY), 0);
+}
+
+static void UnpoisonDefaultStack() {
+  uptr bottom, top;
+
+  if (AsanThread *curr_thread = GetCurrentThread()) {
+    int local_stack;
+    const uptr page_size = GetPageSizeCached();
+    top = curr_thread->stack_top();
+    bottom = ((uptr)&local_stack - page_size) & ~(page_size - 1);
+  } else {
+    CHECK(!SANITIZER_FUCHSIA);
+    // If we haven't seen this thread, try asking the OS for stack bounds.
+    uptr tls_addr, tls_size, stack_size;
+    GetThreadStackAndTls(/*main=*/false, &bottom, &stack_size, &tls_addr,
+                         &tls_size);
+    top = bottom + stack_size;
+  }
+
+  UnpoisonStack(bottom, top, "default");
+}
+
+static void UnpoisonFakeStack() {
+  AsanThread *curr_thread = GetCurrentThread();
+  if (!curr_thread)
+    return;
+  FakeStack *stack = curr_thread->get_fake_stack();
+  if (!stack)
+    return;
+  stack->HandleNoReturn();
+}
+
+}  // namespace __asan
+
+// ---------------------- Interface ---------------- {{{1
+using namespace __asan;
+
+void NOINLINE __asan_handle_no_return() {
+  if (asan_init_is_running)
+    return;
+
+  if (!PlatformUnpoisonStacks())
+    UnpoisonDefaultStack();
+
+  UnpoisonFakeStack();
+}
+
+extern "C" void *__asan_extra_spill_area() {
+  AsanThread *t = GetCurrentThread();
+  CHECK(t);
+  return t->extra_spill_area();
+}
+
+void __asan_handle_vfork(void *sp) {
+  AsanThread *t = GetCurrentThread();
+  CHECK(t);
+  uptr bottom = t->stack_bottom();
+  PoisonShadow(bottom, (uptr)sp - bottom, 0);
+}
+
+void NOINLINE __asan_set_death_callback(void (*callback)(void)) {
+  SetUserDieCallback(callback);
+}
+
+// Initialize as requested from instrumented application code.
+// We use this call as a trigger to wake up ASan from deactivated state.
+void __asan_init() {
+  AsanActivate();
+  AsanInitInternal();
+}
+
+void __asan_version_mismatch_check() {
+  // Do nothing.
+}