Tue, 15 Nov 2011 20:17:33 +0100
7110152: assert(size_in_words <= (julong)max_jint) failed: no overflow
Summary: Reduce what arrayOopDesc::max_array_length() returns to avoid int overflow
Reviewed-by: kvn, dholmes, tonyp
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25 #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_INLINE_HPP
26 #define SHARE_VM_OOPS_OBJARRAYKLASS_INLINE_HPP
28 #include "oops/objArrayKlass.hpp"
29 #ifndef SERIALGC
30 #include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp"
31 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
32 #endif
34 void objArrayKlass::oop_follow_contents(oop obj, int index) {
35 if (UseCompressedOops) {
36 objarray_follow_contents<narrowOop>(obj, index);
37 } else {
38 objarray_follow_contents<oop>(obj, index);
39 }
40 }
42 template <class T>
43 void objArrayKlass::objarray_follow_contents(oop obj, int index) {
44 objArrayOop a = objArrayOop(obj);
45 const size_t len = size_t(a->length());
46 const size_t beg_index = size_t(index);
47 assert(beg_index < len || len == 0, "index too large");
49 const size_t stride = MIN2(len - beg_index, ObjArrayMarkingStride);
50 const size_t end_index = beg_index + stride;
51 T* const base = (T*)a->base();
52 T* const beg = base + beg_index;
53 T* const end = base + end_index;
55 // Push the non-NULL elements of the next stride on the marking stack.
56 for (T* e = beg; e < end; e++) {
57 MarkSweep::mark_and_push<T>(e);
58 }
60 if (end_index < len) {
61 MarkSweep::push_objarray(a, end_index); // Push the continuation.
62 }
63 }
65 #ifndef SERIALGC
66 void objArrayKlass::oop_follow_contents(ParCompactionManager* cm, oop obj,
67 int index) {
68 if (UseCompressedOops) {
69 objarray_follow_contents<narrowOop>(cm, obj, index);
70 } else {
71 objarray_follow_contents<oop>(cm, obj, index);
72 }
73 }
75 template <class T>
76 void objArrayKlass::objarray_follow_contents(ParCompactionManager* cm, oop obj,
77 int index) {
78 objArrayOop a = objArrayOop(obj);
79 const size_t len = size_t(a->length());
80 const size_t beg_index = size_t(index);
81 assert(beg_index < len || len == 0, "index too large");
83 const size_t stride = MIN2(len - beg_index, ObjArrayMarkingStride);
84 const size_t end_index = beg_index + stride;
85 T* const base = (T*)a->base();
86 T* const beg = base + beg_index;
87 T* const end = base + end_index;
89 // Push the non-NULL elements of the next stride on the marking stack.
90 for (T* e = beg; e < end; e++) {
91 PSParallelCompact::mark_and_push<T>(cm, e);
92 }
94 if (end_index < len) {
95 cm->push_objarray(a, end_index); // Push the continuation.
96 }
97 }
98 #endif // #ifndef SERIALGC
100 #endif // SHARE_VM_OOPS_OBJARRAYKLASS_INLINE_HPP