hotspot/src/share/vm/runtime/jniHandles.cpp

rev 7151 : 8043224: -Xcheck:jni improvements to exception checking and excessive local refs
Summary: Warning when not checking exceptions from function that require so, also when local refs expand beyond capacity.
Reviewed-by: dsimms

*** 1,7 ****
  /*
!  * Copyright (c) 1998, 2014, 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) 1998, 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.
*** 294,303 ****
--- 294,304 ----
      }
    }
    block->_top  = 0;
    block->_next = NULL;
    block->_pop_frame_link = NULL;
+   block->_planned_capacity = block_size_in_oops;
    // _last, _free_list & _allocate_before_rebuild initialized in allocate_handle
    debug_only(block->_last = NULL);
    debug_only(block->_free_list = NULL);
    debug_only(block->_allocate_before_rebuild = -1);
    return block;
*** 527,536 ****
--- 528,543 ----
      result++;
    }
    return result;
  }
  
+ const size_t JNIHandleBlock::get_number_of_live_handles() {
+   CountHandleClosure counter;
+   oops_do(&counter);
+   return counter.count();
+ }
+ 
  // This method is not thread-safe, i.e., must be called whule holding a lock on the
  // structure.
  long JNIHandleBlock::memory_usage() const {
    return length() * sizeof(JNIHandleBlock);
  }