toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc@6474c204b198 (annotated)
toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2006, Google Inc. |
| michael@0 | 2 | // All rights reserved. |
| michael@0 | 3 | // |
| michael@0 | 4 | // Redistribution and use in source and binary forms, with or without |
| michael@0 | 5 | // modification, are permitted provided that the following conditions are |
| michael@0 | 6 | // met: |
| michael@0 | 7 | // |
| michael@0 | 8 | // * Redistributions of source code must retain the above copyright |
| michael@0 | 9 | // notice, this list of conditions and the following disclaimer. |
| michael@0 | 10 | // * Redistributions in binary form must reproduce the above |
| michael@0 | 11 | // copyright notice, this list of conditions and the following disclaimer |
| michael@0 | 12 | // in the documentation and/or other materials provided with the |
| michael@0 | 13 | // distribution. |
| michael@0 | 14 | // * Neither the name of Google Inc. nor the names of its |
| michael@0 | 15 | // contributors may be used to endorse or promote products derived from |
| michael@0 | 16 | // this software without specific prior written permission. |
| michael@0 | 17 | // |
| michael@0 | 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| michael@0 | 22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| michael@0 | 23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| michael@0 | 24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| michael@0 | 25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| michael@0 | 26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| michael@0 | 28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 29 | |
| michael@0 | 30 | #include "common/linux/guid_creator.h" |
| michael@0 | 31 | |
| michael@0 | 32 | #include <assert.h> |
| michael@0 | 33 | #include <pthread.h> |
| michael@0 | 34 | #include <stdio.h> |
| michael@0 | 35 | #include <stdlib.h> |
| michael@0 | 36 | #include <time.h> |
| michael@0 | 37 | #include <unistd.h> |
| michael@0 | 38 | |
| michael@0 | 39 | // |
| michael@0 | 40 | // GUIDGenerator |
| michael@0 | 41 | // |
| michael@0 | 42 | // This class is used to generate random GUID. |
| michael@0 | 43 | // Currently use random number to generate a GUID since Linux has |
| michael@0 | 44 | // no native GUID generator. This should be OK since we don't expect |
| michael@0 | 45 | // crash to happen very offen. |
| michael@0 | 46 | // |
| michael@0 | 47 | class GUIDGenerator { |
| michael@0 | 48 | public: |
| michael@0 | 49 | static uint32_t BytesToUInt32(const uint8_t bytes[]) { |
| michael@0 | 50 | return ((uint32_t) bytes[0] |
| michael@0 | 51 | | ((uint32_t) bytes[1] << 8) |
| michael@0 | 52 | | ((uint32_t) bytes[2] << 16) |
| michael@0 | 53 | | ((uint32_t) bytes[3] << 24)); |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | static void UInt32ToBytes(uint8_t bytes[], uint32_t n) { |
| michael@0 | 57 | bytes[0] = n & 0xff; |
| michael@0 | 58 | bytes[1] = (n >> 8) & 0xff; |
| michael@0 | 59 | bytes[2] = (n >> 16) & 0xff; |
| michael@0 | 60 | bytes[3] = (n >> 24) & 0xff; |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | static bool CreateGUID(GUID *guid) { |
| michael@0 | 64 | InitOnce(); |
| michael@0 | 65 | guid->data1 = random(); |
| michael@0 | 66 | guid->data2 = (uint16_t)(random()); |
| michael@0 | 67 | guid->data3 = (uint16_t)(random()); |
| michael@0 | 68 | UInt32ToBytes(&guid->data4[0], random()); |
| michael@0 | 69 | UInt32ToBytes(&guid->data4[4], random()); |
| michael@0 | 70 | return true; |
| michael@0 | 71 | } |
| michael@0 | 72 | |
| michael@0 | 73 | private: |
| michael@0 | 74 | static void InitOnce() { |
| michael@0 | 75 | pthread_once(&once_control, &InitOnceImpl); |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | static void InitOnceImpl() { |
| michael@0 | 79 | srandom(time(NULL)); |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | static pthread_once_t once_control; |
| michael@0 | 83 | }; |
| michael@0 | 84 | |
| michael@0 | 85 | pthread_once_t GUIDGenerator::once_control = PTHREAD_ONCE_INIT; |
| michael@0 | 86 | |
| michael@0 | 87 | bool CreateGUID(GUID *guid) { |
| michael@0 | 88 | return GUIDGenerator::CreateGUID(guid); |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | // Parse guid to string. |
| michael@0 | 92 | bool GUIDToString(const GUID *guid, char *buf, int buf_len) { |
| michael@0 | 93 | // Should allow more space the the max length of GUID. |
| michael@0 | 94 | assert(buf_len > kGUIDStringLength); |
| michael@0 | 95 | int num = snprintf(buf, buf_len, kGUIDFormatString, |
| michael@0 | 96 | guid->data1, guid->data2, guid->data3, |
| michael@0 | 97 | GUIDGenerator::BytesToUInt32(&(guid->data4[0])), |
| michael@0 | 98 | GUIDGenerator::BytesToUInt32(&(guid->data4[4]))); |
| michael@0 | 99 | if (num != kGUIDStringLength) |
| michael@0 | 100 | return false; |
| michael@0 | 101 | |
| michael@0 | 102 | buf[num] = '\0'; |
| michael@0 | 103 | return true; |
| michael@0 | 104 | } |
