ObjFW  Check-in [42ed7e394c]

esac
AS_IF([test x"$have_processes" = x"yes"], [
	AC_SUBST(OFPROCESS_M, "OFProcess.m")
	AC_DEFINE(OF_HAVE_PROCESSES, 1, [Whether we have processes])
])

AC_DEFUN([CHECK_BUILTIN_RETURN_ADDRESS], [
	AC_MSG_CHECKING(for __builtin_return_address)
	AC_TRY_LINK([], [
	AC_MSG_CHECKING(for working __builtin_return_address)
	AC_TRY_LINK([
		#if defined(__ppc__) || defined(__PPC__)
		/* __builtin_return_address() is known to work correctly */
		#else
		# error
		#endif
	], [
		__builtin_return_address(1);
	], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_BUILTIN_RETURN_ADDRESS, 1,
			[Whether we have __builtin_return_address])
	], [
		AC_MSG_RESULT(no)

- initWithClass: (Class)class
{
	self = [super init];

	_inClass = class;
#if defined(HAVE_EXECINFO_H) && defined(HAVE_BACKTRACE)
	_backtraceSize = backtrace(_backtrace, 32);
#elif defined(HAVE_BUILTIN_RETURN_ADDRESS) && defined(__ppc__)
#elif defined(HAVE_BUILTIN_RETURN_ADDRESS)
	/*
	 * We can't use a loop here, as __builtin_return_address() and
	 * __builtin_frame_address() only allow a constant as parameter.
	 */
# define GET_FRAME(i)							\
	if (__builtin_frame_address(i + 1) == NULL)			\
		goto backtrace_done;					\

	}

	objc_autoreleasePoolPop(pool);

	[backtrace makeImmutable];

	return backtrace;
#elif defined(HAVE_BUILTIN_RETURN_ADDRESS) && defined(__ppc__)
#elif defined(HAVE_BUILTIN_RETURN_ADDRESS)
	OFMutableArray *backtrace = [OFMutableArray array];
	void *pool = objc_autoreleasePoolPush();
	uint_fast8_t i;

	for (i = 0; i < 32 && _backtrace[i] != NULL; i++) {
		void *addr =
		    __builtin_extract_return_addr(_backtrace[i]);