Mercurial > hg > graal-jvmci-8
comparison src/share/vm/memory/iterator.hpp @ 1000:a1423fe86a18
Merge
author | trims |
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date | Fri, 09 Oct 2009 15:18:52 -0700 |
parents | 89e0543e1737 753cf9794df9 |
children | 4788266644c1 |
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984:6ddec5389232 | 1000:a1423fe86a18 |
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22 * | 22 * |
23 */ | 23 */ |
24 | 24 |
25 // The following classes are C++ `closures` for iterating over objects, roots and spaces | 25 // The following classes are C++ `closures` for iterating over objects, roots and spaces |
26 | 26 |
27 class CodeBlob; | |
28 class nmethod; | |
27 class ReferenceProcessor; | 29 class ReferenceProcessor; |
28 class DataLayout; | 30 class DataLayout; |
29 | 31 |
30 // Closure provides abortability. | 32 // Closure provides abortability. |
31 | 33 |
67 // ProfileData (MethodDataOop) objects; see, for example, | 69 // ProfileData (MethodDataOop) objects; see, for example, |
68 // VirtualCallData::oop_iterate(). | 70 // VirtualCallData::oop_iterate(). |
69 virtual const bool should_remember_mdo() const { return false; } | 71 virtual const bool should_remember_mdo() const { return false; } |
70 virtual void remember_mdo(DataLayout* v) { /* do nothing */ } | 72 virtual void remember_mdo(DataLayout* v) { /* do nothing */ } |
71 | 73 |
72 // If "true", invoke on nmethods (when scanning compiled frames). | |
73 virtual const bool do_nmethods() const { return false; } | |
74 | |
75 // The methods below control how object iterations invoking this closure | 74 // The methods below control how object iterations invoking this closure |
76 // should be performed: | 75 // should be performed: |
77 | 76 |
78 // If "true", invoke on header klass field. | 77 // If "true", invoke on header klass field. |
79 bool do_header() { return true; } // Note that this is non-virtual. | 78 bool do_header() { return true; } // Note that this is non-virtual. |
171 | 170 |
172 class CompactibleSpaceClosure : public StackObj { | 171 class CompactibleSpaceClosure : public StackObj { |
173 public: | 172 public: |
174 // Called for each compactible space | 173 // Called for each compactible space |
175 virtual void do_space(CompactibleSpace* s) = 0; | 174 virtual void do_space(CompactibleSpace* s) = 0; |
175 }; | |
176 | |
177 | |
178 // CodeBlobClosure is used for iterating through code blobs | |
179 // in the code cache or on thread stacks | |
180 | |
181 class CodeBlobClosure : public Closure { | |
182 public: | |
183 // Called for each code blob. | |
184 virtual void do_code_blob(CodeBlob* cb) = 0; | |
185 }; | |
186 | |
187 | |
188 class MarkingCodeBlobClosure : public CodeBlobClosure { | |
189 public: | |
190 // Called for each code blob, but at most once per unique blob. | |
191 virtual void do_newly_marked_nmethod(nmethod* nm) = 0; | |
192 | |
193 virtual void do_code_blob(CodeBlob* cb); | |
194 // = { if (!nmethod(cb)->test_set_oops_do_mark()) do_newly_marked_nmethod(cb); } | |
195 | |
196 class MarkScope : public StackObj { | |
197 protected: | |
198 bool _active; | |
199 public: | |
200 MarkScope(bool activate = true); | |
201 // = { if (active) nmethod::oops_do_marking_prologue(); } | |
202 ~MarkScope(); | |
203 // = { if (active) nmethod::oops_do_marking_epilogue(); } | |
204 }; | |
205 }; | |
206 | |
207 | |
208 // Applies an oop closure to all ref fields in code blobs | |
209 // iterated over in an object iteration. | |
210 class CodeBlobToOopClosure: public MarkingCodeBlobClosure { | |
211 OopClosure* _cl; | |
212 bool _do_marking; | |
213 public: | |
214 virtual void do_newly_marked_nmethod(nmethod* cb); | |
215 // = { cb->oops_do(_cl); } | |
216 virtual void do_code_blob(CodeBlob* cb); | |
217 // = { if (_do_marking) super::do_code_blob(cb); else cb->oops_do(_cl); } | |
218 CodeBlobToOopClosure(OopClosure* cl, bool do_marking) | |
219 : _cl(cl), _do_marking(do_marking) {} | |
176 }; | 220 }; |
177 | 221 |
178 | 222 |
179 | 223 |
180 // MonitorClosure is used for iterating over monitors in the monitors cache | 224 // MonitorClosure is used for iterating over monitors in the monitors cache |