objc4-818.2.tar.gz

[apple/objc4.git] / test / taggedPointers.m

diff --git a/test/taggedPointers.m b/test/taggedPointers.m
index 76f16177ff938ee1881fb8dd613d35a855069de6..490838b7992789c33b88d0d7d7e2a5a82fd29808 100644 (file)
--- a/test/taggedPointers.m
+++ b/test/taggedPointers.m
@@ -295,6 +295,22 @@ void testGenericTaggedPointer(objc_tag_index_t tag, Class cls)
     RELEASE_VAR(w);
 }
 
+#if OBJC_SPLIT_TAGGED_POINTERS
+void testConstantTaggedPointerRoundTrip(void *ptr)
+{
+    uintptr_t tagged = (uintptr_t)ptr | objc_debug_constant_cfstring_tag_bits;
+    void *untagged = _objc_getTaggedPointerRawPointerValue((void *)tagged);
+    testassert(ptr == untagged);
+}
+
+void testConstantTaggedPointers(void)
+{
+    testConstantTaggedPointerRoundTrip(0);
+    testConstantTaggedPointerRoundTrip((void *)sizeof(void *));
+    testConstantTaggedPointerRoundTrip((void *)(MACH_VM_MAX_ADDRESS - sizeof(void *)));
+}
+#endif
+
 int main()
 {
     testassert(objc_debug_taggedpointer_mask != 0);
@@ -336,6 +352,10 @@ int main()
                                          objc_getClass("TaggedNSObjectSubclass"));
         testGenericTaggedPointer(OBJC_TAG_NSManagedObjectID, 
                                  objc_getClass("TaggedNSObjectSubclass"));
+
+#if OBJC_SPLIT_TAGGED_POINTERS
+        testConstantTaggedPointers();
+#endif
     } POP_POOL;
 
     succeed(__FILE__);