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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 "ipc/ipc_channel.h" | 5 #include "ipc/ipc_channel.h" |
6 | 6 |
7 #include <limits> | 7 #include <limits> |
8 | 8 |
9 #include "base/atomic_sequence_num.h" | 9 #include "base/atomic_sequence_num.h" |
10 #include "base/rand_util.h" | 10 #include "base/rand_util.h" |
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21 | 21 |
22 // static | 22 // static |
23 std::string Channel::GenerateUniqueRandomChannelID() { | 23 std::string Channel::GenerateUniqueRandomChannelID() { |
24 // Note: the string must start with the current process id, this is how | 24 // Note: the string must start with the current process id, this is how |
25 // some child processes determine the pid of the parent. | 25 // some child processes determine the pid of the parent. |
26 // | 26 // |
27 // This is composed of a unique incremental identifier, the process ID of | 27 // This is composed of a unique incremental identifier, the process ID of |
28 // the creator, an identifier for the child instance, and a strong random | 28 // the creator, an identifier for the child instance, and a strong random |
29 // component. The strong random component prevents other processes from | 29 // component. The strong random component prevents other processes from |
30 // hijacking or squatting on predictable channel names. | 30 // hijacking or squatting on predictable channel names. |
31 | 31 #if defined(OS_NACL_NONSFI) |
| 32 // The seccomp sandbox disallows use of getpid(), so we provide a |
| 33 // dummy PID. |
| 34 int process_id = -1; |
| 35 #else |
32 int process_id = base::GetCurrentProcId(); | 36 int process_id = base::GetCurrentProcId(); |
| 37 #endif |
33 return base::StringPrintf("%d.%u.%d", | 38 return base::StringPrintf("%d.%u.%d", |
34 process_id, | 39 process_id, |
35 g_last_id.GetNext(), | 40 g_last_id.GetNext(), |
36 base::RandInt(0, std::numeric_limits<int32>::max())); | 41 base::RandInt(0, std::numeric_limits<int32>::max())); |
37 } | 42 } |
38 | 43 |
39 } // namespace IPC | 44 } // namespace IPC |
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