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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "sandbox/win/src/win_utils.h" | 5 #include "sandbox/win/src/win_utils.h" |
| 6 | 6 |
| 7 #include <map> | 7 #include <map> |
| 8 | 8 |
| 9 #include "base/memory/scoped_ptr.h" | 9 #include "base/memory/scoped_ptr.h" |
| 10 #include "base/strings/string_util.h" | 10 #include "base/strings/string_util.h" |
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| 348 } | 348 } |
| 349 | 349 |
| 350 bool GetPathFromHandle(HANDLE handle, base::string16* path) { | 350 bool GetPathFromHandle(HANDLE handle, base::string16* path) { |
| 351 NtQueryObjectFunction NtQueryObject = NULL; | 351 NtQueryObjectFunction NtQueryObject = NULL; |
| 352 ResolveNTFunctionPtr("NtQueryObject", &NtQueryObject); | 352 ResolveNTFunctionPtr("NtQueryObject", &NtQueryObject); |
| 353 | 353 |
| 354 OBJECT_NAME_INFORMATION initial_buffer; | 354 OBJECT_NAME_INFORMATION initial_buffer; |
| 355 OBJECT_NAME_INFORMATION* name = &initial_buffer; | 355 OBJECT_NAME_INFORMATION* name = &initial_buffer; |
| 356 ULONG size = sizeof(initial_buffer); | 356 ULONG size = sizeof(initial_buffer); |
| 357 // Query the name information a first time to get the size of the name. | 357 // Query the name information a first time to get the size of the name. |
| 358 // Windows XP requires that the size of the buffer passed in here be != 0. |
| 358 NTSTATUS status = NtQueryObject(handle, ObjectNameInformation, name, size, | 359 NTSTATUS status = NtQueryObject(handle, ObjectNameInformation, name, size, |
| 359 &size); | 360 &size); |
| 360 | 361 |
| 361 scoped_ptr<OBJECT_NAME_INFORMATION> name_ptr; | 362 scoped_ptr<BYTE[]> name_ptr; |
| 362 if (size) { | 363 if (size) { |
| 363 name = reinterpret_cast<OBJECT_NAME_INFORMATION*>(new BYTE[size]); | 364 name_ptr.reset(new BYTE[size]); |
| 364 name_ptr.reset(name); | 365 name = reinterpret_cast<OBJECT_NAME_INFORMATION*>(name_ptr.get()); |
| 365 | 366 |
| 366 // Query the name information a second time to get the name of the | 367 // Query the name information a second time to get the name of the |
| 367 // object referenced by the handle. | 368 // object referenced by the handle. |
| 368 status = NtQueryObject(handle, ObjectNameInformation, name, size, &size); | 369 status = NtQueryObject(handle, ObjectNameInformation, name, size, &size); |
| 369 } | 370 } |
| 370 | 371 |
| 371 if (STATUS_SUCCESS != status) | 372 if (STATUS_SUCCESS != status) |
| 372 return false; | 373 return false; |
| 373 | 374 |
| 374 path->assign(name->ObjectName.Buffer, name->ObjectName.Length / | 375 path->assign(name->ObjectName.Buffer, name->ObjectName.Length / |
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| 422 ::InterlockedCompareExchangePointer( | 423 ::InterlockedCompareExchangePointer( |
| 423 reinterpret_cast<PVOID volatile*>(&ntdll), ntdll_local, NULL); | 424 reinterpret_cast<PVOID volatile*>(&ntdll), ntdll_local, NULL); |
| 424 | 425 |
| 425 } | 426 } |
| 426 | 427 |
| 427 CHECK_NT(ntdll); | 428 CHECK_NT(ntdll); |
| 428 FARPROC* function_ptr = reinterpret_cast<FARPROC*>(ptr); | 429 FARPROC* function_ptr = reinterpret_cast<FARPROC*>(ptr); |
| 429 *function_ptr = ::GetProcAddress(ntdll, name); | 430 *function_ptr = ::GetProcAddress(ntdll, name); |
| 430 CHECK_NT(*function_ptr); | 431 CHECK_NT(*function_ptr); |
| 431 } | 432 } |
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