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Diffstat (limited to 'lib/asan/asan_preinit.cc')
| -rw-r--r-- | lib/asan/asan_preinit.cc | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/asan/asan_preinit.cc b/lib/asan/asan_preinit.cc new file mode 100644 index 0000000000000..586f551c23c32 --- /dev/null +++ b/lib/asan/asan_preinit.cc @@ -0,0 +1,31 @@ +//===-- asan_preinit.cc ---------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of AddressSanitizer, an address sanity checker. +// +// Call __asan_init at the very early stage of process startup. +// On Linux we use .preinit_array section (unless PIC macro is defined). +//===----------------------------------------------------------------------===// +#include "asan_internal.h" + +#if ASAN_USE_PREINIT_ARRAY && !defined(PIC) + // On Linux, we force __asan_init to be called before anyone else + // by placing it into .preinit_array section. + // FIXME: do we have anything like this on Mac? + // The symbol is called __local_asan_preinit, because it's not intended to be + // exported. + __attribute__((section(".preinit_array"), used)) + void (*__local_asan_preinit)(void) = __asan_init; +#elif SANITIZER_WINDOWS && defined(_DLL) + // On Windows, when using dynamic CRT (/MD), we can put a pointer + // to __asan_init into the global list of C initializers. + // See crt0dat.c in the CRT sources for the details. + #pragma section(".CRT$XIB", long, read) // NOLINT + __declspec(allocate(".CRT$XIB")) void (*__asan_preinit)() = __asan_init; +#endif |