26 #include "oops/oop.inline.hpp"
27 #include "unittest.hpp"
28
29 // Class to create a "fake" oop with a mark that will
30 // return true for calls to must_be_preserved().
31 class FakeOop {
32 oopDesc _oop;
33
34 public:
35 FakeOop() : _oop() { _oop.set_mark(originalMark()); }
36
37 oop get_oop() { return &_oop; }
38 markWord mark() { return _oop.mark(); }
39 void set_mark(markWord m) { _oop.set_mark(m); }
40 void forward_to(oop obj) {
41 markWord m = markWord::encode_pointer_as_mark(obj);
42 _oop.set_mark(m);
43 }
44
45 static markWord originalMark() { return markWord(markWord::lock_mask_in_place); }
46 static markWord changedMark() { return markWord(0x4711); }
47 };
48
49 #define ASSERT_MARK_WORD_EQ(a, b) ASSERT_EQ((a).value(), (b).value())
50
51 TEST_VM(PreservedMarks, iterate_and_restore) {
52 PreservedMarks pm;
53 FakeOop o1;
54 FakeOop o2;
55 FakeOop o3;
56 FakeOop o4;
57
58 // Make sure initial marks are correct.
59 ASSERT_MARK_WORD_EQ(o1.mark(), FakeOop::originalMark());
60 ASSERT_MARK_WORD_EQ(o2.mark(), FakeOop::originalMark());
61 ASSERT_MARK_WORD_EQ(o3.mark(), FakeOop::originalMark());
62 ASSERT_MARK_WORD_EQ(o4.mark(), FakeOop::originalMark());
63
64 // Change the marks and verify change.
65 o1.set_mark(FakeOop::changedMark());
66 o2.set_mark(FakeOop::changedMark());
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26 #include "oops/oop.inline.hpp"
27 #include "unittest.hpp"
28
29 // Class to create a "fake" oop with a mark that will
30 // return true for calls to must_be_preserved().
31 class FakeOop {
32 oopDesc _oop;
33
34 public:
35 FakeOop() : _oop() { _oop.set_mark(originalMark()); }
36
37 oop get_oop() { return &_oop; }
38 markWord mark() { return _oop.mark(); }
39 void set_mark(markWord m) { _oop.set_mark(m); }
40 void forward_to(oop obj) {
41 markWord m = markWord::encode_pointer_as_mark(obj);
42 _oop.set_mark(m);
43 }
44
45 static markWord originalMark() { return markWord(markWord::lock_mask_in_place); }
46 static markWord changedMark() { return markWord((uintptr_t)0x4711 << markWord::hash_shift); }
47 };
48
49 #define ASSERT_MARK_WORD_EQ(a, b) ASSERT_EQ((a).value(), (b).value())
50
51 TEST_VM(PreservedMarks, iterate_and_restore) {
52 PreservedMarks pm;
53 FakeOop o1;
54 FakeOop o2;
55 FakeOop o3;
56 FakeOop o4;
57
58 // Make sure initial marks are correct.
59 ASSERT_MARK_WORD_EQ(o1.mark(), FakeOop::originalMark());
60 ASSERT_MARK_WORD_EQ(o2.mark(), FakeOop::originalMark());
61 ASSERT_MARK_WORD_EQ(o3.mark(), FakeOop::originalMark());
62 ASSERT_MARK_WORD_EQ(o4.mark(), FakeOop::originalMark());
63
64 // Change the marks and verify change.
65 o1.set_mark(FakeOop::changedMark());
66 o2.set_mark(FakeOop::changedMark());
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