src/share/vm/code/codeCache.hpp

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rev 4773 : 8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
   1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


  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  public:
  68 
  69   // Initialization
  70   static void initialize();
  71 


  72   // Allocation/administration
  73   static CodeBlob* allocate(int size, bool is_critical = false); // allocates a new CodeBlob
  74   static void commit(CodeBlob* cb);                 // called when the allocated CodeBlob has been filled
  75   static int alignment_unit();                      // guaranteed alignment of all CodeBlobs
  76   static int alignment_offset();                    // guaranteed offset of first CodeBlob byte within alignment unit (i.e., allocation header)
  77   static void free(CodeBlob* cb);                   // frees a CodeBlob
  78   static void flush();                              // flushes all CodeBlobs
  79   static bool contains(void *p);                    // returns whether p is included
  80   static void blobs_do(void f(CodeBlob* cb));       // iterates over all CodeBlobs
  81   static void blobs_do(CodeBlobClosure* f);         // iterates over all CodeBlobs
  82   static void nmethods_do(void f(nmethod* nm));     // iterates over all nmethods
  83   static void alive_nmethods_do(void f(nmethod* nm)); // iterates over all alive nmethods
  84 
  85   // Lookup
  86   static CodeBlob* find_blob(void* start);
  87   static nmethod*  find_nmethod(void* start);
  88 
  89   // Lookup that does not fail if you lookup a zombie method (if you call this, be sure to know
  90   // what you are doing)
  91   static CodeBlob* find_blob_unsafe(void* start) {


 138   static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN;
 139   static void scavenge_root_nmethods_do(CodeBlobClosure* f);
 140 
 141   static nmethod* scavenge_root_nmethods()          { return _scavenge_root_nmethods; }
 142   static void set_scavenge_root_nmethods(nmethod* nm) { _scavenge_root_nmethods = nm; }
 143   static void add_scavenge_root_nmethod(nmethod* nm);
 144   static void drop_scavenge_root_nmethod(nmethod* nm);
 145   static void prune_scavenge_root_nmethods();
 146 
 147   // Printing/debugging
 148   static void print();                           // prints summary
 149   static void print_internals();
 150   static void verify();                          // verifies the code cache
 151   static void print_trace(const char* event, CodeBlob* cb, int size = 0) PRODUCT_RETURN;
 152   static void print_summary(outputStream* st, bool detailed = true); // Prints a summary of the code cache usage
 153   static void log_state(outputStream* st);
 154 
 155   // The full limits of the codeCache
 156   static address  low_bound()                    { return (address) _heap->low_boundary(); }
 157   static address  high_bound()                   { return (address) _heap->high_boundary(); }

 158 
 159   // Profiling
 160   static address first_address();                // first address used for CodeBlobs
 161   static address last_address();                 // last  address used for CodeBlobs
 162   static size_t  capacity()                      { return _heap->capacity(); }
 163   static size_t  max_capacity()                  { return _heap->max_capacity(); }
 164   static size_t  unallocated_capacity()          { return _heap->unallocated_capacity(); }
 165   static bool    needs_flushing()                { return unallocated_capacity() < CodeCacheFlushingMinimumFreeSpace; }
 166   static double  reverse_free_ratio();
 167 
 168   static bool needs_cache_clean()                { return _needs_cache_clean; }
 169   static void set_needs_cache_clean(bool v)      { _needs_cache_clean = v;    }
 170   static void clear_inline_caches();             // clear all inline caches
 171 
 172   static nmethod* reanimate_saved_code(Method* m);
 173   static void remove_saved_code(nmethod* nm);
 174   static void speculatively_disconnect(nmethod* nm);
 175 
 176   // Deoptimization
 177   static int  mark_for_deoptimization(DepChange& changes);
 178 #ifdef HOTSWAP
 179   static int  mark_for_evol_deoptimization(instanceKlassHandle dependee);
 180 #endif // HOTSWAP
 181 
 182   static void mark_all_nmethods_for_deoptimization();
 183   static int  mark_for_deoptimization(Method* dependee);
 184   static void make_marked_nmethods_zombies();
 185   static void make_marked_nmethods_not_entrant();
 186 
 187     // tells how many nmethods have dependencies
 188   static int number_of_nmethods_with_dependencies();


 189 };
 190 
 191 #endif // SHARE_VM_CODE_CODECACHE_HPP
   1 /*
   2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


  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)
  81   static void free(CodeBlob* cb);                   // frees a CodeBlob
  82   static void flush();                              // flushes all CodeBlobs
  83   static bool contains(void *p);                    // returns whether p is included
  84   static void blobs_do(void f(CodeBlob* cb));       // iterates over all CodeBlobs
  85   static void blobs_do(CodeBlobClosure* f);         // iterates over all CodeBlobs
  86   static void nmethods_do(void f(nmethod* nm));     // iterates over all nmethods
  87   static void alive_nmethods_do(void f(nmethod* nm)); // iterates over all alive nmethods
  88 
  89   // Lookup
  90   static CodeBlob* find_blob(void* start);
  91   static nmethod*  find_nmethod(void* start);
  92 
  93   // Lookup that does not fail if you lookup a zombie method (if you call this, be sure to know
  94   // what you are doing)
  95   static CodeBlob* find_blob_unsafe(void* start) {


 142   static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN;
 143   static void scavenge_root_nmethods_do(CodeBlobClosure* f);
 144 
 145   static nmethod* scavenge_root_nmethods()          { return _scavenge_root_nmethods; }
 146   static void set_scavenge_root_nmethods(nmethod* nm) { _scavenge_root_nmethods = nm; }
 147   static void add_scavenge_root_nmethod(nmethod* nm);
 148   static void drop_scavenge_root_nmethod(nmethod* nm);
 149   static void prune_scavenge_root_nmethods();
 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