crash_upload_list_win.cc revision 868fa2fe829687343ffae624259930155e16dbd8
1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// Use of this source code is governed by a BSD-style license that can be 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// found in the LICENSE file. 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant#include "chrome/browser/crash_upload_list_win.h" 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include "base/strings/string_util.h" 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include "base/strings/stringprintf.h" 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include "base/strings/sys_string_conversions.h" 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard HinnantCrashUploadListWin::CrashUploadListWin(Delegate* delegate) 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : CrashUploadList(delegate) {} 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantvoid CrashUploadListWin::LoadCrashList() { 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::vector<uint8> buffer(1024); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant HANDLE event_log = OpenEventLog(NULL, L"Application"); 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant if (event_log) { 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant while (true) { 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant DWORD bytes_read; 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant DWORD bytes_needed; 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant BOOL success = 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant ReadEventLog(event_log, 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant EVENTLOG_SEQUENTIAL_READ | EVENTLOG_BACKWARDS_READ, 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 0, 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant &buffer[0], 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant buffer.size(), 27 &bytes_read, 28 &bytes_needed); 29 if (success) { 30 DWORD record_offset = 0; 31 // The ReadEventLog() API docs imply, but do not explicitly state that 32 // partial records will not be returned. Use DCHECK() to affirm this. 33 while (record_offset < bytes_read) { 34 DCHECK(record_offset + sizeof(EVENTLOGRECORD) <= bytes_read); 35 EVENTLOGRECORD* record = (EVENTLOGRECORD*)&buffer[record_offset]; 36 DCHECK(record_offset + record->Length <= bytes_read); 37 if (IsPossibleCrashLogRecord(record)) 38 ProcessPossibleCrashLogRecord(record); 39 record_offset += record->Length; 40 } 41 } else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { 42 // Resize buffer to the required minimum size. 43 buffer.resize(bytes_needed); 44 } else { 45 // Stop on any other error, including the expected case 46 // of ERROR_HANDLE_EOF. 47 DCHECK(GetLastError() == ERROR_HANDLE_EOF); 48 break; 49 } 50 } 51 CloseEventLog(event_log); 52 } 53} 54 55bool CrashUploadListWin::IsPossibleCrashLogRecord( 56 EVENTLOGRECORD* record) const { 57 LPWSTR provider_name = (LPWSTR)((uint8*)record + sizeof(EVENTLOGRECORD)); 58 return !wcscmp(L"Chrome", provider_name) && 59 record->EventType == EVENTLOG_INFORMATION_TYPE && 60 record->NumStrings >= 1; 61} 62 63void CrashUploadListWin::ProcessPossibleCrashLogRecord(EVENTLOGRECORD* record) { 64 // Add the crash if the message matches the expected pattern. 65 const std::wstring pattern_prefix(L"Id="); 66 const std::wstring pattern_suffix(L"."); 67 std::wstring message((LPWSTR)((uint8*)record + record->StringOffset)); 68 size_t start_index = message.find(pattern_prefix); 69 if (start_index != std::wstring::npos) { 70 start_index += pattern_prefix.size(); 71 size_t end_index = message.find(pattern_suffix, start_index); 72 if (end_index != std::wstring::npos) { 73 std::wstring crash_id = 74 message.substr(start_index, end_index - start_index); 75 crashes().push_back( 76 CrashInfo(base::SysWideToUTF8(crash_id), 77 base::Time::FromDoubleT(record->TimeGenerated))); 78 } 79 } 80} 81