| // Copyright 2018 The Crashpad Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "handler/linux/crash_report_exception_handler.h" |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "base/logging.h" |
| #include "client/settings.h" |
| #include "handler/linux/capture_snapshot.h" |
| #include "minidump/minidump_file_writer.h" |
| #include "snapshot/linux/process_snapshot_linux.h" |
| #include "snapshot/sanitized/process_snapshot_sanitized.h" |
| #include "util/file/file_reader.h" |
| #include "util/file/output_stream_file_writer.h" |
| #include "util/linux/direct_ptrace_connection.h" |
| #include "util/linux/ptrace_client.h" |
| #include "util/misc/implicit_cast.h" |
| #include "util/misc/metrics.h" |
| #include "util/misc/uuid.h" |
| #include "util/stream/base94_output_stream.h" |
| #include "util/stream/log_output_stream.h" |
| #include "util/stream/zlib_output_stream.h" |
| |
| #if defined(STARBOARD) |
| #include "starboard/elf_loader/evergreen_info.h" |
| #endif |
| |
| namespace crashpad { |
| |
| namespace { |
| |
| bool WriteMinidumpLogFromFile(FileReaderInterface* file_reader) { |
| ZlibOutputStream stream(ZlibOutputStream::Mode::kCompress, |
| std::make_unique<Base94OutputStream>( |
| Base94OutputStream::Mode::kEncode, |
| std::make_unique<LogOutputStream>())); |
| FileOperationResult read_result; |
| do { |
| uint8_t buffer[4096]; |
| read_result = file_reader->Read(buffer, sizeof(buffer)); |
| if (read_result < 0) |
| return false; |
| |
| if (read_result > 0 && (!stream.Write(buffer, read_result))) |
| return false; |
| } while (read_result > 0); |
| return stream.Flush(); |
| } |
| |
| } // namespace |
| |
| CrashReportExceptionHandler::CrashReportExceptionHandler( |
| CrashReportDatabase* database, |
| CrashReportUploadThread* upload_thread, |
| const std::map<std::string, std::string>* process_annotations, |
| bool write_minidump_to_database, |
| bool write_minidump_to_log, |
| const UserStreamDataSources* user_stream_data_sources) |
| : database_(database), |
| upload_thread_(upload_thread), |
| process_annotations_(process_annotations), |
| write_minidump_to_database_(write_minidump_to_database), |
| write_minidump_to_log_(write_minidump_to_log), |
| user_stream_data_sources_(user_stream_data_sources) { |
| DCHECK(write_minidump_to_database_ | write_minidump_to_log_); |
| } |
| |
| CrashReportExceptionHandler::~CrashReportExceptionHandler() = default; |
| |
| #if defined(STARBOARD) |
| bool CrashReportExceptionHandler::AddEvergreenInfo( |
| const ExceptionHandlerProtocol::ClientInformation& info) { |
| evergreen_info_ = info.evergreen_information_address; |
| return true; |
| } |
| #endif |
| |
| bool CrashReportExceptionHandler::HandleException( |
| pid_t client_process_id, |
| uid_t client_uid, |
| const ExceptionHandlerProtocol::ClientInformation& info, |
| VMAddress requesting_thread_stack_address, |
| pid_t* requesting_thread_id, |
| UUID* local_report_id) { |
| Metrics::ExceptionEncountered(); |
| |
| DirectPtraceConnection connection; |
| if (!connection.Initialize(client_process_id)) { |
| Metrics::ExceptionCaptureResult( |
| Metrics::CaptureResult::kDirectPtraceFailed); |
| return false; |
| } |
| |
| return HandleExceptionWithConnection(&connection, |
| info, |
| client_uid, |
| requesting_thread_stack_address, |
| requesting_thread_id, |
| local_report_id); |
| } |
| |
| bool CrashReportExceptionHandler::HandleExceptionWithBroker( |
| pid_t client_process_id, |
| uid_t client_uid, |
| const ExceptionHandlerProtocol::ClientInformation& info, |
| int broker_sock, |
| UUID* local_report_id) { |
| Metrics::ExceptionEncountered(); |
| |
| PtraceClient client; |
| if (!client.Initialize(broker_sock, client_process_id)) { |
| Metrics::ExceptionCaptureResult( |
| Metrics::CaptureResult::kBrokeredPtraceFailed); |
| return false; |
| } |
| |
| return HandleExceptionWithConnection( |
| &client, info, client_uid, 0, nullptr, local_report_id); |
| } |
| |
| bool CrashReportExceptionHandler::HandleExceptionWithConnection( |
| PtraceConnection* connection, |
| const ExceptionHandlerProtocol::ClientInformation& info, |
| uid_t client_uid, |
| VMAddress requesting_thread_stack_address, |
| pid_t* requesting_thread_id, |
| UUID* local_report_id) { |
| std::unique_ptr<ProcessSnapshotLinux> process_snapshot; |
| std::unique_ptr<ProcessSnapshotSanitized> sanitized_snapshot; |
| if (!CaptureSnapshot(connection, |
| info, |
| *process_annotations_, |
| client_uid, |
| requesting_thread_stack_address, |
| requesting_thread_id, |
| &process_snapshot, |
| &sanitized_snapshot |
| #if defined(STARBOARD) |
| , |
| evergreen_info_ |
| #endif |
| )) { |
| return false; |
| } |
| |
| UUID client_id; |
| Settings* const settings = database_->GetSettings(); |
| if (settings) { |
| // If GetSettings() or GetClientID() fails, something else will log a |
| // message and client_id will be left at its default value, all zeroes, |
| // which is appropriate. |
| settings->GetClientID(&client_id); |
| } |
| process_snapshot->SetClientID(client_id); |
| |
| return write_minidump_to_database_ |
| ? WriteMinidumpToDatabase(process_snapshot.get(), |
| sanitized_snapshot.get(), |
| write_minidump_to_log_, |
| local_report_id) |
| : WriteMinidumpToLog(process_snapshot.get(), |
| sanitized_snapshot.get()); |
| } |
| |
| bool CrashReportExceptionHandler::WriteMinidumpToDatabase( |
| ProcessSnapshotLinux* process_snapshot, |
| ProcessSnapshotSanitized* sanitized_snapshot, |
| bool write_minidump_to_log, |
| UUID* local_report_id) { |
| std::unique_ptr<CrashReportDatabase::NewReport> new_report; |
| CrashReportDatabase::OperationStatus database_status = |
| database_->PrepareNewCrashReport(&new_report); |
| if (database_status != CrashReportDatabase::kNoError) { |
| LOG(ERROR) << "PrepareNewCrashReport failed"; |
| Metrics::ExceptionCaptureResult( |
| Metrics::CaptureResult::kPrepareNewCrashReportFailed); |
| return false; |
| } |
| |
| process_snapshot->SetReportID(new_report->ReportID()); |
| |
| ProcessSnapshot* snapshot = |
| sanitized_snapshot ? implicit_cast<ProcessSnapshot*>(sanitized_snapshot) |
| : implicit_cast<ProcessSnapshot*>(process_snapshot); |
| |
| MinidumpFileWriter minidump; |
| minidump.InitializeFromSnapshot(snapshot); |
| AddUserExtensionStreams(user_stream_data_sources_, snapshot, &minidump); |
| |
| if (!minidump.WriteEverything(new_report->Writer())) { |
| LOG(ERROR) << "WriteEverything failed"; |
| Metrics::ExceptionCaptureResult( |
| Metrics::CaptureResult::kMinidumpWriteFailed); |
| return false; |
| } |
| |
| bool write_minidump_to_log_succeed = false; |
| if (write_minidump_to_log) { |
| if (auto* file_reader = new_report->Reader()) { |
| if (WriteMinidumpLogFromFile(file_reader)) |
| write_minidump_to_log_succeed = true; |
| else |
| LOG(ERROR) << "WriteMinidumpLogFromFile failed"; |
| } |
| } |
| |
| UUID uuid; |
| database_status = |
| database_->FinishedWritingCrashReport(std::move(new_report), &uuid); |
| if (database_status != CrashReportDatabase::kNoError) { |
| LOG(ERROR) << "FinishedWritingCrashReport failed"; |
| Metrics::ExceptionCaptureResult( |
| Metrics::CaptureResult::kFinishedWritingCrashReportFailed); |
| return false; |
| } |
| |
| if (upload_thread_) { |
| upload_thread_->ReportPending(uuid); |
| } |
| |
| if (local_report_id != nullptr) { |
| *local_report_id = uuid; |
| } |
| |
| Metrics::ExceptionCaptureResult(Metrics::CaptureResult::kSuccess); |
| |
| return write_minidump_to_log ? write_minidump_to_log_succeed : true; |
| } |
| |
| bool CrashReportExceptionHandler::WriteMinidumpToLog( |
| ProcessSnapshotLinux* process_snapshot, |
| ProcessSnapshotSanitized* sanitized_snapshot) { |
| ProcessSnapshot* snapshot = |
| sanitized_snapshot ? implicit_cast<ProcessSnapshot*>(sanitized_snapshot) |
| : implicit_cast<ProcessSnapshot*>(process_snapshot); |
| MinidumpFileWriter minidump; |
| minidump.InitializeFromSnapshot(snapshot); |
| AddUserExtensionStreams(user_stream_data_sources_, snapshot, &minidump); |
| |
| OutputStreamFileWriter writer(std::make_unique<ZlibOutputStream>( |
| ZlibOutputStream::Mode::kCompress, |
| std::make_unique<Base94OutputStream>( |
| Base94OutputStream::Mode::kEncode, |
| std::make_unique<LogOutputStream>()))); |
| if (!minidump.WriteMinidump(&writer, false /* allow_seek */)) { |
| LOG(ERROR) << "WriteMinidump failed"; |
| return false; |
| } |
| return writer.Flush(); |
| } |
| |
| } // namespace crashpad |
