MdeModulePkg/Application/VariableInfo/VariableInfo.c

   1 /** @file
   2   If the Variable services have PcdVariableCollectStatistics set to TRUE then
   3   the EFI system table will contain statistical information about variable usage
   4   an this utility will print out the information. You can use console redirection
   5   to capture the data.
   6
   7   Copyright (c) 2006 - 2007, Intel Corporation
   8   All rights reserved. This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16 **/
  17
  18 #include <Uefi.h>
  19 #include <Library/UefiLib.h>
  20 #include <Library/UefiApplicationEntryPoint.h>
  21 #include <Guid/VariableInfo.h>
  22
  23
  24 /**
  25   The user Entry Point for Application. The user code starts with this function
  26   as the real entry point for the image goes into a library that calls this
  27   function.
  28
  29
  30   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
  31   @param[in] SystemTable    A pointer to the EFI System Table.
  32
  33   @retval EFI_SUCCESS       The entry point is executed successfully.
  34   @retval other             Some error occurs when executing this entry point.
  35
  36 **/
  37 EFI_STATUS
  38 EFIAPI
  39 UefiMain (
  40   IN EFI_HANDLE        ImageHandle,
  41   IN EFI_SYSTEM_TABLE  *SystemTable
  42   )
  43 {
  44   EFI_STATUS            Status;
  45   VARIABLE_INFO_ENTRY   *VariableInfo;
  46   VARIABLE_INFO_ENTRY   *Entry;
  47
  48   Status = EfiGetSystemConfigurationTable (&gEfiVariableInfoGuid, (VOID **)&Entry);
  49   if (!EFI_ERROR (Status) && (Entry != NULL)) {
  50     Print (L"Non-Volatile EFI Variables:\n");
  51     VariableInfo = Entry;
  52     do {
  53       if (!VariableInfo->Volatile) {
  54         Print (
  55           L"%g R%03d(%03d) W%03d D%03d:%s\n",
  56           &VariableInfo->VendorGuid,
  57           VariableInfo->ReadCount,
  58           VariableInfo->CacheCount,
  59           VariableInfo->WriteCount,
  60           VariableInfo->DeleteCount,
  61           VariableInfo->Name
  62           );
  63       }
  64
  65       VariableInfo = VariableInfo->Next;
  66     } while (VariableInfo != NULL);
  67
  68     Print (L"Volatile EFI Variables:\n");
  69     VariableInfo = Entry;
  70     do {
  71       if (VariableInfo->Volatile) {
  72         Print (
  73           L"%g R%03d(%03d) W%03d D%03d:%s\n",
  74           &VariableInfo->VendorGuid,
  75           VariableInfo->ReadCount,
  76           VariableInfo->CacheCount,
  77           VariableInfo->WriteCount,
  78           VariableInfo->DeleteCount,
  79           VariableInfo->Name
  80           );
  81       }
  82       VariableInfo = VariableInfo->Next;
  83     } while (VariableInfo != NULL);
  84
  85   }
  86
  87   return Status;
  88 }