kjs/CollectorHeapIntrospector.h

   1 /*
   2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef CollectorHeapIntrospector_h
  30 #define CollectorHeapIntrospector_h
  31
  32 #include <malloc/malloc.h>
  33 #include "Assertions.h"
  34
  35 namespace KJS {
  36
  37 struct CollectorHeap;
  38
  39 class CollectorHeapIntrospector {
  40 public:
  41     static void init(CollectorHeap*, CollectorHeap*);
  42     static kern_return_t enumerate(task_t, void* context, unsigned typeMask, vm_address_t zoneAddress, memory_reader_t, vm_range_recorder_t);
  43     static size_t goodSize(malloc_zone_t*, size_t size) { return size; }
  44     static boolean_t check(malloc_zone_t*) { return true; }
  45     static void  print(malloc_zone_t*, boolean_t) { }
  46     static void log(malloc_zone_t*, void*) { }
  47     static void forceLock(malloc_zone_t*) { }
  48     static void forceUnlock(malloc_zone_t*) { }
  49     static void statistics(malloc_zone_t*, malloc_statistics_t*) { }
  50
  51 private:
  52     CollectorHeapIntrospector(CollectorHeap*, CollectorHeap*);
  53     static size_t size(malloc_zone_t*, const void*) { return 0; }
  54     static void* zoneMalloc(malloc_zone_t*, size_t) { LOG_ERROR("malloc is not supported"); return 0; }
  55     static void* zoneCalloc(malloc_zone_t*, size_t, size_t) { LOG_ERROR("calloc is not supported"); return 0; }
  56     static void* zoneRealloc(malloc_zone_t*, void*, size_t) { LOG_ERROR("realloc is not supported"); return 0; }
  57     static void* zoneValloc(malloc_zone_t*, size_t) { LOG_ERROR("valloc is not supported"); return 0; }
  58     static void zoneDestroy(malloc_zone_t*) { }
  59
  60     static void zoneFree(malloc_zone_t*, void* ptr)
  61     {
  62         // Due to <rdar://problem/5671357> zoneFree may be called by the system free even if the pointer
  63         // is not in this zone.  When this happens, the pointer being freed was not allocated by any
  64         // zone so we need to print a useful error for the application developer.
  65         malloc_printf("*** error for object %p: pointer being freed was not allocated\n", ptr);
  66     }
  67
  68     malloc_zone_t m_zone;
  69     CollectorHeap* m_primaryHeap;
  70     CollectorHeap* m_numberHeap;
  71 };
  72
  73 }
  74
  75 #endif // CollectorHeapIntrospector_h