The Tor Browser / file comparison
comparison: toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc
toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:619f24e1a778 |
|---|---|
| 1 // Copyright (c) 2006, Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 #include "common/linux/guid_creator.h" | |
| 31 | |
| 32 #include <assert.h> | |
| 33 #include <pthread.h> | |
| 34 #include <stdio.h> | |
| 35 #include <stdlib.h> | |
| 36 #include <time.h> | |
| 37 #include <unistd.h> | |
| 38 | |
| 39 // | |
| 40 // GUIDGenerator | |
| 41 // | |
| 42 // This class is used to generate random GUID. | |
| 43 // Currently use random number to generate a GUID since Linux has | |
| 44 // no native GUID generator. This should be OK since we don't expect | |
| 45 // crash to happen very offen. | |
| 46 // | |
| 47 class GUIDGenerator { | |
| 48 public: | |
| 49 static uint32_t BytesToUInt32(const uint8_t bytes[]) { | |
| 50 return ((uint32_t) bytes[0] | |
| 51 | ((uint32_t) bytes[1] << 8) | |
| 52 | ((uint32_t) bytes[2] << 16) | |
| 53 | ((uint32_t) bytes[3] << 24)); | |
| 54 } | |
| 55 | |
| 56 static void UInt32ToBytes(uint8_t bytes[], uint32_t n) { | |
| 57 bytes[0] = n & 0xff; | |
| 58 bytes[1] = (n >> 8) & 0xff; | |
| 59 bytes[2] = (n >> 16) & 0xff; | |
| 60 bytes[3] = (n >> 24) & 0xff; | |
| 61 } | |
| 62 | |
| 63 static bool CreateGUID(GUID *guid) { | |
| 64 InitOnce(); | |
| 65 guid->data1 = random(); | |
| 66 guid->data2 = (uint16_t)(random()); | |
| 67 guid->data3 = (uint16_t)(random()); | |
| 68 UInt32ToBytes(&guid->data4[0], random()); | |
| 69 UInt32ToBytes(&guid->data4[4], random()); | |
| 70 return true; | |
| 71 } | |
| 72 | |
| 73 private: | |
| 74 static void InitOnce() { | |
| 75 pthread_once(&once_control, &InitOnceImpl); | |
| 76 } | |
| 77 | |
| 78 static void InitOnceImpl() { | |
| 79 srandom(time(NULL)); | |
| 80 } | |
| 81 | |
| 82 static pthread_once_t once_control; | |
| 83 }; | |
| 84 | |
| 85 pthread_once_t GUIDGenerator::once_control = PTHREAD_ONCE_INIT; | |
| 86 | |
| 87 bool CreateGUID(GUID *guid) { | |
| 88 return GUIDGenerator::CreateGUID(guid); | |
| 89 } | |
| 90 | |
| 91 // Parse guid to string. | |
| 92 bool GUIDToString(const GUID *guid, char *buf, int buf_len) { | |
| 93 // Should allow more space the the max length of GUID. | |
| 94 assert(buf_len > kGUIDStringLength); | |
| 95 int num = snprintf(buf, buf_len, kGUIDFormatString, | |
| 96 guid->data1, guid->data2, guid->data3, | |
| 97 GUIDGenerator::BytesToUInt32(&(guid->data4[0])), | |
| 98 GUIDGenerator::BytesToUInt32(&(guid->data4[4]))); | |
| 99 if (num != kGUIDStringLength) | |
| 100 return false; | |
| 101 | |
| 102 buf[num] = '\0'; | |
| 103 return true; | |
| 104 } |
