| //===-- asan_globals_win.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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Global registration code that is linked into every Windows DLL and EXE. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "asan_interface_internal.h" |
| #if SANITIZER_WINDOWS |
| |
| namespace __asan { |
| |
| #pragma section(".ASAN$GA", read, write) |
| #pragma section(".ASAN$GZ", read, write) |
| extern "C" __declspec(allocate(".ASAN$GA")) |
| ALIGNED(sizeof(__asan_global)) __asan_global __asan_globals_start = {}; |
| extern "C" __declspec(allocate(".ASAN$GZ")) |
| ALIGNED(sizeof(__asan_global)) __asan_global __asan_globals_end = {}; |
| #pragma comment(linker, "/merge:.ASAN=.data") |
| |
| static void call_on_globals(void (*hook)(__asan_global *, uptr)) { |
| __asan_global *start = &__asan_globals_start + 1; |
| __asan_global *end = &__asan_globals_end; |
| uptr bytediff = (uptr)end - (uptr)start; |
| if (bytediff % sizeof(__asan_global) != 0) { |
| #if defined(SANITIZER_DLL_THUNK) || defined(SANITIZER_DYNAMIC_RUNTIME_THUNK) |
| __debugbreak(); |
| #else |
| CHECK("corrupt asan global array"); |
| #endif |
| } |
| // We know end >= start because the linker sorts the portion after the dollar |
| // sign alphabetically. |
| uptr n = end - start; |
| hook(start, n); |
| } |
| |
| static void register_dso_globals() { |
| call_on_globals(&__asan_register_globals); |
| } |
| |
| static void unregister_dso_globals() { |
| call_on_globals(&__asan_unregister_globals); |
| } |
| |
| // Register globals |
| #pragma section(".CRT$XCU", long, read) |
| #pragma section(".CRT$XTX", long, read) |
| extern "C" __declspec(allocate(".CRT$XCU")) |
| void (*const __asan_dso_reg_hook)() = ®ister_dso_globals; |
| extern "C" __declspec(allocate(".CRT$XTX")) |
| void (*const __asan_dso_unreg_hook)() = &unregister_dso_globals; |
| |
| } // namespace __asan |
| |
| #endif // SANITIZER_WINDOWS |