1 //===-- asan_preinit.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 // Call __asan_init at the very early stage of process startup. 13 // On Linux we use .preinit_array section (unless PIC macro is defined). 14 //===----------------------------------------------------------------------===// 15 #include "asan_internal.h" 16 17 #if ASAN_USE_PREINIT_ARRAY && !defined(PIC) 18 // On Linux, we force __asan_init to be called before anyone else 19 // by placing it into .preinit_array section. 20 // FIXME: do we have anything like this on Mac? 21 // The symbol is called __local_asan_preinit, because it's not intended to be 22 // exported. 23 __attribute__((section(".preinit_array"), used)) 24 void (*__local_asan_preinit)(void) = __asan_init; 25 #elif SANITIZER_WINDOWS && defined(_DLL) 26 // On Windows, when using dynamic CRT (/MD), we can put a pointer 27 // to __asan_init into the global list of C initializers. 28 // See crt0dat.c in the CRT sources for the details. 29 #pragma section(".CRT$XIB", long, read) // NOLINT 30 __declspec(allocate(".CRT$XIB")) void (*__asan_preinit)() = __asan_init; 31 #endif 32
