128 // For detecting GC bugs. Should only be called at GC boundaries, since
129 // some unused space may be used as scratch space during GC's.
130 // We also call this when expanding a space to satisfy an allocation
131 // request. See bug #4668531
132 virtual void mangle_unused_area() = 0;
133 virtual void mangle_unused_area_complete() = 0;
134
135 // Testers
136 bool is_empty() const { return used() == 0; }
137 bool not_empty() const { return used() > 0; }
138
139 // Returns true iff the given the space contains the
140 // given address as part of an allocated object. For
141 // certain kinds of spaces, this might be a potentially
142 // expensive operation. To prevent performance problems
143 // on account of its inadvertent use in product jvm's,
144 // we restrict its use to assertion checks only.
145 bool is_in(const void* p) const {
146 return used_region().contains(p);
147 }
148
149 // Returns true iff the given reserved memory of the space contains the
150 // given address.
151 bool is_in_reserved(const void* p) const { return _bottom <= p && p < _end; }
152
153 // Returns true iff the given block is not allocated.
154 virtual bool is_free_block(const HeapWord* p) const = 0;
155
156 // Test whether p is double-aligned
157 static bool is_aligned(void* p) {
158 return ::is_aligned(p, sizeof(double));
159 }
160
161 // Size computations. Sizes are in bytes.
162 size_t capacity() const { return byte_size(bottom(), end()); }
163 virtual size_t used() const = 0;
164 virtual size_t free() const = 0;
165
166 // Iterate over all the ref-containing fields of all objects in the
167 // space, calling "cl.do_oop" on each. Fields in objects allocated by
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128 // For detecting GC bugs. Should only be called at GC boundaries, since
129 // some unused space may be used as scratch space during GC's.
130 // We also call this when expanding a space to satisfy an allocation
131 // request. See bug #4668531
132 virtual void mangle_unused_area() = 0;
133 virtual void mangle_unused_area_complete() = 0;
134
135 // Testers
136 bool is_empty() const { return used() == 0; }
137 bool not_empty() const { return used() > 0; }
138
139 // Returns true iff the given the space contains the
140 // given address as part of an allocated object. For
141 // certain kinds of spaces, this might be a potentially
142 // expensive operation. To prevent performance problems
143 // on account of its inadvertent use in product jvm's,
144 // we restrict its use to assertion checks only.
145 bool is_in(const void* p) const {
146 return used_region().contains(p);
147 }
148 bool is_in(oop obj) const {
149 return is_in((void*)obj);
150 }
151
152 // Returns true iff the given reserved memory of the space contains the
153 // given address.
154 bool is_in_reserved(const void* p) const { return _bottom <= p && p < _end; }
155
156 // Returns true iff the given block is not allocated.
157 virtual bool is_free_block(const HeapWord* p) const = 0;
158
159 // Test whether p is double-aligned
160 static bool is_aligned(void* p) {
161 return ::is_aligned(p, sizeof(double));
162 }
163
164 // Size computations. Sizes are in bytes.
165 size_t capacity() const { return byte_size(bottom(), end()); }
166 virtual size_t used() const = 0;
167 virtual size_t free() const = 0;
168
169 // Iterate over all the ref-containing fields of all objects in the
170 // space, calling "cl.do_oop" on each. Fields in objects allocated by
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