src/share/vm/gc_implementation/parallelScavenge/psOldGen.hpp

*** 1,7 ****
  /*
!  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 58,72 ****
--- 58,94 ----
    const size_t _max_gen_size;
  
    // Used when initializing the _name field.
    static inline const char* select_name();
  
+ #ifdef ASSERT
+ #define assert_block_in_covered_region(_block_start_, _word_size_)                          \
+   do {                                                                                      \
+     MemRegion __covered_region__ = this->start_array()->covered_region();                   \
+     MemRegion __new_memregion__(_block_start_, _word_size_);                                \
+     MemRegion __used__ = this->object_space()->used_region();                               \
+     assert(__covered_region__.contains(__new_memregion__),                                  \
+            err_msg("new region is not in covered_region [ "PTR_FORMAT", "PTR_FORMAT" ], "   \
+                    "new region [ "PTR_FORMAT", "PTR_FORMAT" ], "                            \
+                    "object space [ "PTR_FORMAT", "PTR_FORMAT" ]",                           \
+                    p2i(__covered_region__.start()),                                         \
+                    p2i(__covered_region__.end()),                                           \
+                    p2i(__new_memregion__.start()),                                          \
+                    p2i(__new_memregion__.end()),                                            \
+                    p2i(__used__.start()),                                                   \
+                    p2i(__used__.end())));                                                   \
+   } while (0)
+ #else
+   #define assert_block_in_covered_region(_block_start_, _word_size_)
+ #endif
+ 
    HeapWord* allocate_noexpand(size_t word_size) {
      // We assume the heap lock is held here.
      assert_locked_or_safepoint(Heap_lock);
      HeapWord* res = object_space()->allocate(word_size);
      if (res != NULL) {
+       assert_block_in_covered_region(res, word_size);
        _start_array.allocate_block(res);
      }
      return res;
    }
  
*** 75,84 ****
--- 97,107 ----
    // safe for use at the same time as allocate_noexpand()!
    HeapWord* cas_allocate_noexpand(size_t word_size) {
      assert(SafepointSynchronize::is_at_safepoint(), "Must only be called at safepoint");
      HeapWord* res = object_space()->cas_allocate(word_size);
      if (res != NULL) {
+       assert_block_in_covered_region(res, word_size);
        _start_array.allocate_block(res);
      }
      return res;
    }