security/sandbox/chromium/base/win/scoped_handle.cc@b8a032363ba2 (annotated)
security/sandbox/chromium/base/win/scoped_handle.cc
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "base/win/scoped_handle.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include <map> |
| michael@0 | 8 | |
| michael@0 | 9 | #include "base/debug/alias.h" |
| michael@0 | 10 | #include "base/lazy_instance.h" |
| michael@0 | 11 | #include "base/synchronization/lock.h" |
| michael@0 | 12 | #include "base/win/windows_version.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace { |
| michael@0 | 15 | |
| michael@0 | 16 | struct Info { |
| michael@0 | 17 | const void* owner; |
| michael@0 | 18 | const void* pc1; |
| michael@0 | 19 | const void* pc2; |
| michael@0 | 20 | DWORD thread_id; |
| michael@0 | 21 | }; |
| michael@0 | 22 | typedef std::map<HANDLE, Info> HandleMap; |
| michael@0 | 23 | |
| michael@0 | 24 | base::LazyInstance<HandleMap>::Leaky g_handle_map = LAZY_INSTANCE_INITIALIZER; |
| michael@0 | 25 | base::LazyInstance<base::Lock>::Leaky g_lock = LAZY_INSTANCE_INITIALIZER; |
| michael@0 | 26 | |
| michael@0 | 27 | } // namespace |
| michael@0 | 28 | |
| michael@0 | 29 | namespace base { |
| michael@0 | 30 | namespace win { |
| michael@0 | 31 | |
| michael@0 | 32 | // Static. |
| michael@0 | 33 | void VerifierTraits::StartTracking(HANDLE handle, const void* owner, |
| michael@0 | 34 | const void* pc1, const void* pc2) { |
| michael@0 | 35 | // Grab the thread id before the lock. |
| michael@0 | 36 | DWORD thread_id = GetCurrentThreadId(); |
| michael@0 | 37 | |
| michael@0 | 38 | AutoLock lock(g_lock.Get()); |
| michael@0 | 39 | |
| michael@0 | 40 | Info handle_info = { owner, pc1, pc2, thread_id }; |
| michael@0 | 41 | std::pair<HANDLE, Info> item(handle, handle_info); |
| michael@0 | 42 | std::pair<HandleMap::iterator, bool> result = g_handle_map.Get().insert(item); |
| michael@0 | 43 | if (!result.second) { |
| michael@0 | 44 | Info other = result.first->second; |
| michael@0 | 45 | debug::Alias(&other); |
| michael@0 | 46 | CHECK(false); |
| michael@0 | 47 | } |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | // Static. |
| michael@0 | 51 | void VerifierTraits::StopTracking(HANDLE handle, const void* owner, |
| michael@0 | 52 | const void* pc1, const void* pc2) { |
| michael@0 | 53 | AutoLock lock(g_lock.Get()); |
| michael@0 | 54 | HandleMap::iterator i = g_handle_map.Get().find(handle); |
| michael@0 | 55 | if (i == g_handle_map.Get().end()) |
| michael@0 | 56 | CHECK(false); |
| michael@0 | 57 | |
| michael@0 | 58 | Info other = i->second; |
| michael@0 | 59 | if (other.owner != owner) { |
| michael@0 | 60 | debug::Alias(&other); |
| michael@0 | 61 | CHECK(false); |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | g_handle_map.Get().erase(i); |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | } // namespace win |
| michael@0 | 68 | } // namespace base |
