87 #endif
88 };
89
90 // Instances of this class are used for quick tests on whether a reference points
91 // into the collection set and into which generation or is a humongous object
92 //
93 // Each of the array's elements indicates whether the corresponding region is in
94 // the collection set and if so in which generation, or a humongous region.
95 //
96 // We use this to speed up reference processing during young collection and
97 // quickly reclaim humongous objects. For the latter, by making a humongous region
98 // succeed this test, we sort-of add it to the collection set. During the reference
99 // iteration closures, when we see a humongous region, we then simply mark it as
100 // referenced, i.e. live.
101 class G1InCSetStateFastTestBiasedMappedArray : public G1BiasedMappedArray<InCSetState> {
102 protected:
103 InCSetState default_value() const { return InCSetState::NotInCSet; }
104 public:
105 void set_humongous(uintptr_t index) {
106 assert(get_by_index(index).is_default(),
107 err_msg("State at index " INTPTR_FORMAT" should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
108 set_by_index(index, InCSetState::Humongous);
109 }
110
111 void clear_humongous(uintptr_t index) {
112 set_by_index(index, InCSetState::NotInCSet);
113 }
114
115 void set_in_young(uintptr_t index) {
116 assert(get_by_index(index).is_default(),
117 err_msg("State at index " INTPTR_FORMAT" should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
118 set_by_index(index, InCSetState::Young);
119 }
120
121 void set_in_old(uintptr_t index) {
122 assert(get_by_index(index).is_default(),
123 err_msg("State at index " INTPTR_FORMAT" should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
124 set_by_index(index, InCSetState::Old);
125 }
126
127 bool is_in_cset_or_humongous(HeapWord* addr) const { return at(addr).is_in_cset_or_humongous(); }
128 bool is_in_cset(HeapWord* addr) const { return at(addr).is_in_cset(); }
129 bool is_in_cset(const HeapRegion* hr) const { return get_by_index(hr->hrm_index()).is_in_cset(); }
130 InCSetState at(HeapWord* addr) const { return get_by_address(addr); }
131 void clear() { G1BiasedMappedArray<InCSetState>::clear(); }
132 void clear(const HeapRegion* hr) { return set_by_index(hr->hrm_index(), InCSetState::NotInCSet); }
133 };
134
135 #endif // SHARE_VM_GC_G1_G1INCSETSTATE_HPP
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87 #endif
88 };
89
90 // Instances of this class are used for quick tests on whether a reference points
91 // into the collection set and into which generation or is a humongous object
92 //
93 // Each of the array's elements indicates whether the corresponding region is in
94 // the collection set and if so in which generation, or a humongous region.
95 //
96 // We use this to speed up reference processing during young collection and
97 // quickly reclaim humongous objects. For the latter, by making a humongous region
98 // succeed this test, we sort-of add it to the collection set. During the reference
99 // iteration closures, when we see a humongous region, we then simply mark it as
100 // referenced, i.e. live.
101 class G1InCSetStateFastTestBiasedMappedArray : public G1BiasedMappedArray<InCSetState> {
102 protected:
103 InCSetState default_value() const { return InCSetState::NotInCSet; }
104 public:
105 void set_humongous(uintptr_t index) {
106 assert(get_by_index(index).is_default(),
107 err_msg("State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
108 set_by_index(index, InCSetState::Humongous);
109 }
110
111 void clear_humongous(uintptr_t index) {
112 set_by_index(index, InCSetState::NotInCSet);
113 }
114
115 void set_in_young(uintptr_t index) {
116 assert(get_by_index(index).is_default(),
117 err_msg("State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
118 set_by_index(index, InCSetState::Young);
119 }
120
121 void set_in_old(uintptr_t index) {
122 assert(get_by_index(index).is_default(),
123 err_msg("State at index " INTPTR_FORMAT " should be default but is " CSETSTATE_FORMAT, index, get_by_index(index).value()));
124 set_by_index(index, InCSetState::Old);
125 }
126
127 bool is_in_cset_or_humongous(HeapWord* addr) const { return at(addr).is_in_cset_or_humongous(); }
128 bool is_in_cset(HeapWord* addr) const { return at(addr).is_in_cset(); }
129 bool is_in_cset(const HeapRegion* hr) const { return get_by_index(hr->hrm_index()).is_in_cset(); }
130 InCSetState at(HeapWord* addr) const { return get_by_address(addr); }
131 void clear() { G1BiasedMappedArray<InCSetState>::clear(); }
132 void clear(const HeapRegion* hr) { return set_by_index(hr->hrm_index(), InCSetState::NotInCSet); }
133 };
134
135 #endif // SHARE_VM_GC_G1_G1INCSETSTATE_HPP
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