40 // - Like the offset table in oldspace the zone has at table for
41 // locating a method given a addess of an instruction.
42
43 class OopClosure;
44 class DepChange;
45
46 class CodeCache : AllStatic {
47 friend class VMStructs;
48 private:
49 // CodeHeap is malloc()'ed at startup and never deleted during shutdown,
50 // so that the generated assembly code is always there when it's needed.
51 // This may cause memory leak, but is necessary, for now. See 4423824,
52 // 4422213 or 4436291 for details.
53 static CodeHeap * _heap;
54 static int _number_of_blobs;
55 static int _number_of_adapters;
56 static int _number_of_nmethods;
57 static int _number_of_nmethods_with_dependencies;
58 static bool _needs_cache_clean;
59 static nmethod* _scavenge_root_nmethods; // linked via nm->scavenge_root_link()
60 static nmethod* _saved_nmethods; // Linked list of speculatively disconnected nmethods.
61
62 static void verify_if_often() PRODUCT_RETURN;
63
64 static void mark_scavenge_root_nmethods() PRODUCT_RETURN;
65 static void verify_perm_nmethods(CodeBlobClosure* f_or_null) PRODUCT_RETURN;
66
67 static int _codemem_full_count;
68
69 public:
70
71 // Initialization
72 static void initialize();
73
74 static void report_codemem_full();
75
76 // Allocation/administration
77 static CodeBlob* allocate(int size, bool is_critical = false); // allocates a new CodeBlob
78 static void commit(CodeBlob* cb); // called when the allocated CodeBlob has been filled
79 static int alignment_unit(); // guaranteed alignment of all CodeBlobs
80 static int alignment_offset(); // guaranteed offset of first CodeBlob byte within alignment unit (i.e., allocation header)
150
151 // Printing/debugging
152 static void print(); // prints summary
153 static void print_internals();
154 static void verify(); // verifies the code cache
155 static void print_trace(const char* event, CodeBlob* cb, int size = 0) PRODUCT_RETURN;
156 static void print_summary(outputStream* st, bool detailed = true); // Prints a summary of the code cache usage
157 static void log_state(outputStream* st);
158
159 // The full limits of the codeCache
160 static address low_bound() { return (address) _heap->low_boundary(); }
161 static address high_bound() { return (address) _heap->high_boundary(); }
162 static address high() { return (address) _heap->high(); }
163
164 // Profiling
165 static address first_address(); // first address used for CodeBlobs
166 static address last_address(); // last address used for CodeBlobs
167 static size_t capacity() { return _heap->capacity(); }
168 static size_t max_capacity() { return _heap->max_capacity(); }
169 static size_t unallocated_capacity() { return _heap->unallocated_capacity(); }
170 static bool needs_flushing() { return unallocated_capacity() < CodeCacheFlushingMinimumFreeSpace; }
171 static double reverse_free_ratio();
172
173 static bool needs_cache_clean() { return _needs_cache_clean; }
174 static void set_needs_cache_clean(bool v) { _needs_cache_clean = v; }
175 static void clear_inline_caches(); // clear all inline caches
176
177 static nmethod* reanimate_saved_code(Method* m);
178 static void remove_saved_code(nmethod* nm);
179 static void speculatively_disconnect(nmethod* nm);
180
181 // Deoptimization
182 static int mark_for_deoptimization(DepChange& changes);
183 #ifdef HOTSWAP
184 static int mark_for_evol_deoptimization(instanceKlassHandle dependee);
185 #endif // HOTSWAP
186
187 static void mark_all_nmethods_for_deoptimization();
188 static int mark_for_deoptimization(Method* dependee);
189 static void make_marked_nmethods_zombies();
190 static void make_marked_nmethods_not_entrant();
191
192 // tells how many nmethods have dependencies
193 static int number_of_nmethods_with_dependencies();
194
195 static int get_codemem_full_count() { return _codemem_full_count; }
196 };
197
198 #endif // SHARE_VM_CODE_CODECACHE_HPP
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40 // - Like the offset table in oldspace the zone has at table for
41 // locating a method given a addess of an instruction.
42
43 class OopClosure;
44 class DepChange;
45
46 class CodeCache : AllStatic {
47 friend class VMStructs;
48 private:
49 // CodeHeap is malloc()'ed at startup and never deleted during shutdown,
50 // so that the generated assembly code is always there when it's needed.
51 // This may cause memory leak, but is necessary, for now. See 4423824,
52 // 4422213 or 4436291 for details.
53 static CodeHeap * _heap;
54 static int _number_of_blobs;
55 static int _number_of_adapters;
56 static int _number_of_nmethods;
57 static int _number_of_nmethods_with_dependencies;
58 static bool _needs_cache_clean;
59 static nmethod* _scavenge_root_nmethods; // linked via nm->scavenge_root_link()
60
61 static void verify_if_often() PRODUCT_RETURN;
62
63 static void mark_scavenge_root_nmethods() PRODUCT_RETURN;
64 static void verify_perm_nmethods(CodeBlobClosure* f_or_null) PRODUCT_RETURN;
65
66 static int _codemem_full_count;
67
68 public:
69
70 // Initialization
71 static void initialize();
72
73 static void report_codemem_full();
74
75 // Allocation/administration
76 static CodeBlob* allocate(int size, bool is_critical = false); // allocates a new CodeBlob
77 static void commit(CodeBlob* cb); // called when the allocated CodeBlob has been filled
78 static int alignment_unit(); // guaranteed alignment of all CodeBlobs
79 static int alignment_offset(); // guaranteed offset of first CodeBlob byte within alignment unit (i.e., allocation header)
149
150 // Printing/debugging
151 static void print(); // prints summary
152 static void print_internals();
153 static void verify(); // verifies the code cache
154 static void print_trace(const char* event, CodeBlob* cb, int size = 0) PRODUCT_RETURN;
155 static void print_summary(outputStream* st, bool detailed = true); // Prints a summary of the code cache usage
156 static void log_state(outputStream* st);
157
158 // The full limits of the codeCache
159 static address low_bound() { return (address) _heap->low_boundary(); }
160 static address high_bound() { return (address) _heap->high_boundary(); }
161 static address high() { return (address) _heap->high(); }
162
163 // Profiling
164 static address first_address(); // first address used for CodeBlobs
165 static address last_address(); // last address used for CodeBlobs
166 static size_t capacity() { return _heap->capacity(); }
167 static size_t max_capacity() { return _heap->max_capacity(); }
168 static size_t unallocated_capacity() { return _heap->unallocated_capacity(); }
169 static double reverse_free_ratio();
170
171 static bool needs_cache_clean() { return _needs_cache_clean; }
172 static void set_needs_cache_clean(bool v) { _needs_cache_clean = v; }
173 static void clear_inline_caches(); // clear all inline caches
174
175 // Deoptimization
176 static int mark_for_deoptimization(DepChange& changes);
177 #ifdef HOTSWAP
178 static int mark_for_evol_deoptimization(instanceKlassHandle dependee);
179 #endif // HOTSWAP
180
181 static void mark_all_nmethods_for_deoptimization();
182 static int mark_for_deoptimization(Method* dependee);
183 static void make_marked_nmethods_zombies();
184 static void make_marked_nmethods_not_entrant();
185
186 // tells how many nmethods have dependencies
187 static int number_of_nmethods_with_dependencies();
188
189 static int get_codemem_full_count() { return _codemem_full_count; }
190 };
191
192 #endif // SHARE_VM_CODE_CODECACHE_HPP
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