gcc/libsanitizer/asan/asan_preinit.cc
Jakub Jelinek 7d61373544 re PR sanitizer/56393 (SIGSEGV when -fsanitize=address and dynamic lib with global objects)
PR sanitizer/56393
	* config/gnu-user.h (LIBASAN_EARLY_SPEC): Link in libasan_preinit.o
	if not linking a shared library.

	* lib/asan-dg.exp (asan_link_flags): Add
	-B${gccpath}/libsanitizer/asan/ to flags.

	* asan/Makefile.am (nodist_toolexeclib_HEADERS): Set to
	libasan_preinit.o.
	(libasan_preinit.o): Depend on asan_preinit.o.
	* asan/Makefile.in: Regenerated.
	* asan/asan_preinit.cc: New file, synced from upstream.
	* asan/asan_rtl.cc: Remove preinit stuff, synced from upstream.

From-SVN: r196222
2013-02-22 17:07:36 +01:00

28 lines
1.2 KiB
C++

//===-- asan_preinit.cc ---------------------------------------------------===//
//
// 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?
__attribute__((section(".preinit_array"), used))
void (*__asan_preinit)(void) =__asan_init;
#elif defined(_WIN32) && 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