src/share/vm/runtime/perfMemory.cpp

*** 43,57 ****
--- 43,62 ----
  // character will be included in the sizeof(PERFDATA_NAME) operation.
  static const size_t PERFDATA_FILENAME_LEN = sizeof(PERFDATA_NAME) +
                                              UINT_CHARS + 1;
  
  char*                    PerfMemory::_start = NULL;
+ char*                    PerfMemory::_saved_start = NULL;
  char*                    PerfMemory::_end = NULL;
+ char*                    PerfMemory::_saved_end = NULL;
  char*                    PerfMemory::_top = NULL;
+ char*                    PerfMemory::_saved_top = NULL;
  size_t                   PerfMemory::_capacity = 0;
+ size_t                   PerfMemory::_saved_capacity = 0;
  jint                     PerfMemory::_initialized = false;
  PerfDataPrologue*        PerfMemory::_prologue = NULL;
+ PerfDataPrologue*        PerfMemory::_saved_prologue = NULL;
  
  void perfMemory_init() {
  
    if (!UsePerfData) return;
  
*** 101,110 ****
--- 106,117 ----
                 capacity);
    }
  
    // allocate PerfData memory region
    create_memory_region(capacity);
+   _saved_start = _start;
+   _saved_capacity = _capacity;
  
    if (_start == NULL) {
  
      // the PerfMemory region could not be created as desired. Rather
      // than terminating the JVM, we revert to creating the instrumentation
*** 130,141 ****
--- 137,151 ----
                   p2i(_start),
                   _capacity);
      }
  
      _prologue = (PerfDataPrologue *)_start;
+     _saved_prologue = _prologue;
      _end = _start + _capacity;
+     _saved_end = _end;
      _top = _start + sizeof(PerfDataPrologue);
+     _saved_top = _top;
    }
  
    assert(_prologue != NULL, "prologue pointer must be initialized");
  
  #ifdef VM_LITTLE_ENDIAN