86 #endif
87 };
88
89 // Instances of this class are used for quick tests on whether a reference points
90 // into the collection set and into which generation or is a humongous object
91 //
92 // Each of the array's elements indicates whether the corresponding region is in
93 // the collection set and if so in which generation, or a humongous region.
94 //
95 // We use this to speed up reference processing during young collection and
96 // quickly reclaim humongous objects. For the latter, by making a humongous region
97 // succeed this test, we sort-of add it to the collection set. During the reference
98 // iteration closures, when we see a humongous region, we then simply mark it as
99 // referenced, i.e. live.
100 class G1InCSetStateFastTestBiasedMappedArray : public G1BiasedMappedArray<InCSetState> {
101 protected:
102 InCSetState default_value() const { return InCSetState::NotInCSet; }
103 public:
104 void set_humongous(uintptr_t index) {
105 assert(get_by_index(index).is_default(),
106 err_msg("State at index " INTPTR_FORMAT" should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
107 set_by_index(index, InCSetState::Humongous);
108 }
109
110 void clear_humongous(uintptr_t index) {
111 set_by_index(index, InCSetState::NotInCSet);
112 }
113
114 void set_in_young(uintptr_t index) {
115 assert(get_by_index(index).is_default(),
116 err_msg("State at index " INTPTR_FORMAT" should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
117 set_by_index(index, InCSetState::Young);
118 }
119
120 void set_in_old(uintptr_t index) {
121 assert(get_by_index(index).is_default(),
122 err_msg("State at index " INTPTR_FORMAT" should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
123 set_by_index(index, InCSetState::Old);
124 }
125
126 bool is_in_cset_or_humongous(HeapWord* addr) const { return at(addr).is_in_cset_or_humongous(); }
127 bool is_in_cset(HeapWord* addr) const { return at(addr).is_in_cset(); }
128 InCSetState at(HeapWord* addr) const { return get_by_address(addr); }
129 void clear() { G1BiasedMappedArray<InCSetState>::clear(); }
130 };
131
132 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1INCSETSTATE_HPP
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86 #endif
87 };
88
89 // Instances of this class are used for quick tests on whether a reference points
90 // into the collection set and into which generation or is a humongous object
91 //
92 // Each of the array's elements indicates whether the corresponding region is in
93 // the collection set and if so in which generation, or a humongous region.
94 //
95 // We use this to speed up reference processing during young collection and
96 // quickly reclaim humongous objects. For the latter, by making a humongous region
97 // succeed this test, we sort-of add it to the collection set. During the reference
98 // iteration closures, when we see a humongous region, we then simply mark it as
99 // referenced, i.e. live.
100 class G1InCSetStateFastTestBiasedMappedArray : public G1BiasedMappedArray<InCSetState> {
101 protected:
102 InCSetState default_value() const { return InCSetState::NotInCSet; }
103 public:
104 void set_humongous(uintptr_t index) {
105 assert(get_by_index(index).is_default(),
106 err_msg("State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
107 set_by_index(index, InCSetState::Humongous);
108 }
109
110 void clear_humongous(uintptr_t index) {
111 set_by_index(index, InCSetState::NotInCSet);
112 }
113
114 void set_in_young(uintptr_t index) {
115 assert(get_by_index(index).is_default(),
116 err_msg("State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
117 set_by_index(index, InCSetState::Young);
118 }
119
120 void set_in_old(uintptr_t index) {
121 assert(get_by_index(index).is_default(),
122 err_msg("State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
123 set_by_index(index, InCSetState::Old);
124 }
125
126 bool is_in_cset_or_humongous(HeapWord* addr) const { return at(addr).is_in_cset_or_humongous(); }
127 bool is_in_cset(HeapWord* addr) const { return at(addr).is_in_cset(); }
128 InCSetState at(HeapWord* addr) const { return get_by_address(addr); }
129 void clear() { G1BiasedMappedArray<InCSetState>::clear(); }
130 };
131
132 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1INCSETSTATE_HPP
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