ObjFW  Diff

static struct objc_exception emergencyExceptions[NUM_EMERGENCY_EXCEPTIONS];
#ifdef OF_HAVE_THREADS
static of_spinlock_t emergencyExceptionsSpinlock;

OF_CONSTRUCTOR()
{
	if (!of_spinlock_new(&emergencyExceptionsSpinlock))
		OBJC_ERROR("Cannot create spinlock!");
}
#endif

static uint64_t
readULEB128(const uint8_t **ptr)
{
	uint64_t value = 0;

#endif
#ifdef HAVE__UNWIND_GETTEXTRELBASE
	case DW_EH_PE_textrel:
		return _Unwind_GetTextRelBase(ctx);
#endif
	}

	OBJC_ERROR("Unknown encoding!");
}

static size_t
sizeForEncoding(uint8_t enc)
{
	if (enc == DW_EH_PE_omit)
		return 0;

	switch (enc & 0x07) {
	case DW_EH_PE_absptr:
		return sizeof(void *);
	case DW_EH_PE_udata2:
		return 2;
	case DW_EH_PE_udata4:
		return 4;
	case DW_EH_PE_udata8:
		return 8;
	}

	OBJC_ERROR("Unknown encoding!");
}

static uint64_t
readValue(uint8_t enc, const uint8_t **ptr)
{
	uint64_t value;

	if (enc == DW_EH_PE_aligned)
		OBJC_ERROR("DW_EH_PE_aligned is not implemented!");

#define READ(type)					\
	{						\
		type tmp;				\
		memcpy(&tmp, *ptr, sizeof(type));	\
		value = tmp;				\
		*ptr += sizeForEncoding(enc);		\

	case DW_EH_PE_sdata2:
		READ(int16_t)
	case DW_EH_PE_sdata4:
		READ(int32_t)
	case DW_EH_PE_sdata8:
		READ(int64_t)
	default:
		OBJC_ERROR("Unknown encoding!");
	}
#undef READ

	return value;
}

#ifndef HAVE_ARM_EHABI_EXCEPTIONS

			if (classMatches(class, e->object)) {
				*filterPtr = filter;
				return HANDLER_FOUND;
			}
		} else if (filter == 0)
			return CLEANUP_FOUND;
		else if (filter < 0)
			OBJC_ERROR("Invalid filter!");
	} while (displacement != 0);

	return 0;
}

#ifdef HAVE_SEH_EXCEPTIONS
static

		    (uintptr_t)ex);
		_Unwind_SetGR(ctx, __builtin_eh_return_data_regno(1), filter);
		_Unwind_SetIP(ctx, landingpad);

		return _URC_INSTALL_CONTEXT;
	}

	OBJC_ERROR(
	    "Neither _UA_SEARCH_PHASE nor _UA_CLEANUP_PHASE in actions!");
}

static void
cleanup(_Unwind_Reason_Code reason, struct _Unwind_Exception *ex)
{
	free(ex);
}

#ifdef OF_HAVE_THREADS
		if (!of_spinlock_unlock(&emergencyExceptionsSpinlock))
			OBJC_ERROR("Cannot lock spinlock!");
#endif
	}

	if (e == NULL)
		OBJC_ERROR("Not enough memory to allocate exception!");

	e->exception.class = GNUCOBJC_EXCEPTION_CLASS;
	e->exception.cleanup = (emergency
	    ? emergencyExceptionCleanup : cleanup);
	e->object = object;

	_Unwind_RaiseException(&e->exception);

	if (uncaughtExceptionHandler != NULL)
		uncaughtExceptionHandler(object);

	OBJC_ERROR("_Unwind_RaiseException() returned!");
}

objc_uncaught_exception_handler_t
objc_setUncaughtExceptionHandler(objc_uncaught_exception_handler_t handler)
{
	objc_uncaught_exception_handler_t old = uncaughtExceptionHandler;
	uncaughtExceptionHandler = handler;