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e7b80a52f5
The new call is also used in CrashReportDatabaseWin::PrepareNewCrashReport(). Previously, that method used the UUID::InitializeFromBytes() constructor. That actually caused various fields of the UUID to be byte-swapped so that the ::UUID and crashpad::UUID would be different UUIDs. Although a UUID is mostly random, the version field in data_3 is used as a namespace and should be 4 for random UUIDs, and this was not the case under swapping. TEST=crashpad_util_test UUID.FromSystem BUG=crashpad:1 R=scottmg@chromium.org Review URL: https://codereview.chromium.org/1004913004
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#if !defined(__STDC_FORMAT_MACROS)
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#define __STDC_FORMAT_MACROS
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#endif
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#include "util/misc/uuid.h"
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include "base/basictypes.h"
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#include "base/strings/stringprintf.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/sys_byteorder.h"
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#include "util/stdlib/cxx.h"
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#if CXX_LIBRARY_VERSION >= 2011
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#include <type_traits>
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#endif
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namespace crashpad {
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static_assert(sizeof(UUID) == 16, "UUID must be 16 bytes");
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#if CXX_LIBRARY_VERSION >= 2011
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static_assert(std::is_standard_layout<UUID>::value,
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"UUID must be standard layout");
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#endif
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UUID::UUID() : data_1(0), data_2(0), data_3(0), data_4(), data_5() {
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}
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UUID::UUID(const uint8_t* bytes) {
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InitializeFromBytes(bytes);
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}
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bool UUID::operator==(const UUID& that) const {
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return memcmp(this, &that, sizeof(UUID)) == 0;
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}
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void UUID::InitializeFromBytes(const uint8_t* bytes) {
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memcpy(this, bytes, sizeof(*this));
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data_1 = base::NetToHost32(data_1);
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data_2 = base::NetToHost16(data_2);
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data_3 = base::NetToHost16(data_3);
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}
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bool UUID::InitializeFromString(const base::StringPiece& string) {
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if (string.length() != 36)
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return false;
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UUID temp;
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const char kScanFormat[] =
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"%08" SCNx32 "-%04" SCNx16 "-%04" SCNx16
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"-%02" SCNx8 "%02" SCNx8
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"-%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8;
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int rv = sscanf(string.data(),
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kScanFormat,
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&temp.data_1,
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&temp.data_2,
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&temp.data_3,
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&temp.data_4[0],
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&temp.data_4[1],
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&temp.data_5[0],
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&temp.data_5[1],
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&temp.data_5[2],
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&temp.data_5[3],
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&temp.data_5[4],
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&temp.data_5[5]);
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if (rv != 11)
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return false;
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*this = temp;
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return true;
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}
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#if defined(OS_WIN)
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void UUID::InitializeFromSystemUUID(const ::UUID* system_uuid) {
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static_assert(sizeof(::UUID) == sizeof(UUID),
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"unexpected system uuid size");
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static_assert(offsetof(::UUID, Data1) == offsetof(UUID, data_1),
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"unexpected system uuid layout");
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memcpy(this, system_uuid, sizeof(::UUID));
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}
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#endif // OS_WIN
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std::string UUID::ToString() const {
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return base::StringPrintf("%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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data_1,
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data_2,
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data_3,
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data_4[0],
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data_4[1],
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data_5[0],
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data_5[1],
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data_5[2],
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data_5[3],
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data_5[4],
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data_5[5]);
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}
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#if defined(OS_WIN)
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base::string16 UUID::ToString16() const {
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return base::UTF8ToUTF16(ToString());
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}
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#endif // OS_WIN
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} // namespace crashpad
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