1 /*
   2  * Copyright (c) 1997, 2010, 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  *

  35 #ifdef TARGET_OS_FAMILY_windows
  36 # include "thread_windows.inline.hpp"
  37 #endif
  38 
  39 // The resource area holds temporary data structures in the VM.
  40 // The actual allocation areas are thread local. Typical usage:
  41 //
  42 //   ...
  43 //   {
  44 //     ResourceMark rm;
  45 //     int foo[] = NEW_RESOURCE_ARRAY(int, 64);
  46 //     ...
  47 //   }
  48 //   ...
  49 
  50 //------------------------------ResourceArea-----------------------------------
  51 // A ResourceArea is an Arena that supports safe usage of ResourceMark.
  52 class ResourceArea: public Arena {
  53   friend class ResourceMark;
  54   friend class DeoptResourceMark;

  55   debug_only(int _nesting;)             // current # of nested ResourceMarks
  56   debug_only(static int _warned;)       // to suppress multiple warnings
  57 
  58 public:
  59   ResourceArea() {
  60     debug_only(_nesting = 0;)
  61   }
  62 
  63   ResourceArea(size_t init_size) : Arena(init_size) {
  64     debug_only(_nesting = 0;);
  65   }
  66 
  67   char* allocate_bytes(size_t size) {
  68 #ifdef ASSERT
  69     if (_nesting < 1 && !_warned++)
  70       fatal("memory leak: allocating without ResourceMark");
  71     if (UseMallocOnly) {
  72       // use malloc, but save pointer in res. area for later freeing
  73       char** save = (char**)internal_malloc_4(sizeof(char*));
  74       return (*save = (char*)os::malloc(size));

   1 /*
   2  * Copyright (c) 1997, 2011, 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  *

  35 #ifdef TARGET_OS_FAMILY_windows
  36 # include "thread_windows.inline.hpp"
  37 #endif
  38 
  39 // The resource area holds temporary data structures in the VM.
  40 // The actual allocation areas are thread local. Typical usage:
  41 //
  42 //   ...
  43 //   {
  44 //     ResourceMark rm;
  45 //     int foo[] = NEW_RESOURCE_ARRAY(int, 64);
  46 //     ...
  47 //   }
  48 //   ...
  49 
  50 //------------------------------ResourceArea-----------------------------------
  51 // A ResourceArea is an Arena that supports safe usage of ResourceMark.
  52 class ResourceArea: public Arena {
  53   friend class ResourceMark;
  54   friend class DeoptResourceMark;
  55   friend class VMStructs;
  56   debug_only(int _nesting;)             // current # of nested ResourceMarks
  57   debug_only(static int _warned;)       // to suppress multiple warnings
  58 
  59 public:
  60   ResourceArea() {
  61     debug_only(_nesting = 0;)
  62   }
  63 
  64   ResourceArea(size_t init_size) : Arena(init_size) {
  65     debug_only(_nesting = 0;);
  66   }
  67 
  68   char* allocate_bytes(size_t size) {
  69 #ifdef ASSERT
  70     if (_nesting < 1 && !_warned++)
  71       fatal("memory leak: allocating without ResourceMark");
  72     if (UseMallocOnly) {
  73       // use malloc, but save pointer in res. area for later freeing
  74       char** save = (char**)internal_malloc_4(sizeof(char*));
  75       return (*save = (char*)os::malloc(size));