1 /*
   2  * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 #include "precompiled.hpp"
  24 
  25 #ifdef ASSERT
  26 
  27 #include "memory/allocation.hpp"
  28 #include "gc/shenandoah/shenandoahHeap.hpp"
  29 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
  30 #include "gc/shenandoah/shenandoahPrinter.hpp"
  31 
  32 class ShenandoahPrintAllRefsOopClosure: public ExtendedOopClosure {
  33 private:
  34   int _index;
  35   const char* _prefix;
  36 
  37 public:
  38   ShenandoahPrintAllRefsOopClosure(const char* prefix) : _index(0), _prefix(prefix) {}
  39 
  40 private:
  41   template <class T>
  42   inline void do_oop_work(T* p) {
  43     oop o = oopDesc::load_decode_heap_oop(p);
  44     if (o != NULL) {
  45       if (ShenandoahHeap::heap()->is_in(o) && oopDesc::is_oop(o)) {
  46         tty->print_cr("%s "INT32_FORMAT" ("PTR_FORMAT")-> "PTR_FORMAT" (marked: %s) (%s "PTR_FORMAT")",
  47                       _prefix, _index,
  48                       p2i(p), p2i(o),
  49                       BOOL_TO_STR(ShenandoahHeap::heap()->is_marked(o)),
  50                       o->klass()->internal_name(), p2i(o->klass()));
  51       } else {
  52         tty->print_cr("%s "INT32_FORMAT" ("PTR_FORMAT" dirty -> "PTR_FORMAT" (not in heap, possibly corrupted or dirty)",
  53                       _prefix, _index,
  54                       p2i(p), p2i(o));
  55       }
  56     } else {
  57       tty->print_cr("%s "INT32_FORMAT" ("PTR_FORMAT") -> "PTR_FORMAT, _prefix, _index, p2i(p), p2i((HeapWord*) o));
  58     }
  59     _index++;
  60   }
  61 
  62 public:
  63   void do_oop(oop* p) {
  64     do_oop_work(p);
  65   }
  66 
  67   void do_oop(narrowOop* p) {
  68     do_oop_work(p);
  69   }
  70 };
  71 
  72 class ShenandoahPrintAllRefsObjectClosure : public ObjectClosure {
  73   const char* _prefix;
  74 
  75 public:
  76   ShenandoahPrintAllRefsObjectClosure(const char* prefix) : _prefix(prefix) {}
  77 
  78   void do_object(oop p) {
  79     if (ShenandoahHeap::heap()->is_in(p)) {
  80       tty->print_cr("%s object "PTR_FORMAT" (marked: %s) (%s "PTR_FORMAT") refers to:",
  81                     _prefix, p2i(p),
  82                     BOOL_TO_STR(ShenandoahHeap::heap()->is_marked(p)),
  83                     p->klass()->internal_name(), p2i(p->klass()));
  84       ShenandoahPrintAllRefsOopClosure cl(_prefix);
  85       p->oop_iterate(&cl);
  86     }
  87   }
  88 };
  89 
  90 void ShenandoahPrinter::print_all_refs(const char* prefix) {
  91   tty->print_cr("printing all references in the heap");
  92   tty->print_cr("root references:");
  93 
  94   _heap->make_tlabs_parsable(false);
  95 
  96   ShenandoahPrintAllRefsOopClosure cl(prefix);
  97   _heap->roots_iterate(&cl);
  98 
  99   tty->print_cr("heap references:");
 100   ShenandoahPrintAllRefsObjectClosure cl2(prefix);
 101   _heap->object_iterate(&cl2);
 102 }
 103 
 104 #endif