LCOV - code coverage report
Current view: top level - devtools/shared/heapsnapshot - AutoMemMap.cpp (source / functions) Hit Total Coverage
Test: output.info Lines: 0 30 0.0 %
Date: 2017-07-14 16:53:18 Functions: 0 2 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "mozilla/devtools/AutoMemMap.h"
       8             : 
       9             : #include "mozilla/Unused.h"
      10             : #include "nsDebug.h"
      11             : 
      12             : namespace mozilla {
      13             : namespace devtools {
      14             : 
      15           0 : AutoMemMap::~AutoMemMap()
      16             : {
      17           0 :   if (addr) {
      18           0 :     Unused << NS_WARN_IF(PR_MemUnmap(addr, size()) != PR_SUCCESS);
      19           0 :     addr = nullptr;
      20             :   }
      21             : 
      22           0 :   if (fileMap) {
      23           0 :     Unused << NS_WARN_IF(PR_CloseFileMap(fileMap) != PR_SUCCESS);
      24           0 :     fileMap = nullptr;
      25             :   }
      26             : 
      27           0 :   if (fd) {
      28           0 :     Unused << NS_WARN_IF(PR_Close(fd) != PR_SUCCESS);
      29           0 :     fd = nullptr;
      30             :   }
      31           0 : }
      32             : 
      33             : nsresult
      34           0 : AutoMemMap::init(const char* filePath, int flags, int mode, PRFileMapProtect prot)
      35             : {
      36           0 :   MOZ_ASSERT(!fd);
      37           0 :   MOZ_ASSERT(!fileMap);
      38           0 :   MOZ_ASSERT(!addr);
      39             : 
      40           0 :   if (PR_GetFileInfo64(filePath, &fileInfo) != PR_SUCCESS)
      41           0 :     return NS_ERROR_FILE_NOT_FOUND;
      42             : 
      43             :   // Check if the file is too big to memmap.
      44           0 :   if (fileInfo.size > int64_t(UINT32_MAX))
      45           0 :     return NS_ERROR_INVALID_ARG;
      46           0 :   auto length = uint32_t(fileInfo.size);
      47             : 
      48           0 :   fd = PR_Open(filePath, flags, flags);
      49           0 :   if (!fd)
      50           0 :     return NS_ERROR_UNEXPECTED;
      51             : 
      52           0 :   fileMap = PR_CreateFileMap(fd, fileInfo.size, prot);
      53           0 :   if (!fileMap)
      54           0 :     return NS_ERROR_UNEXPECTED;
      55             : 
      56           0 :   addr = PR_MemMap(fileMap, 0, length);
      57           0 :   if (!addr)
      58           0 :     return NS_ERROR_UNEXPECTED;
      59             : 
      60           0 :   return NS_OK;
      61             : }
      62             : 
      63             : } // namespace devtools
      64             : } // namespace mozilla

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