| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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. |
| */ |
| #define DEBUG false |
| #include "Log.h" |
| |
| #include "Section.h" |
| |
| #include <dirent.h> |
| #include <errno.h> |
| |
| #include <mutex> |
| #include <set> |
| |
| #include <android-base/file.h> |
| #include <android-base/stringprintf.h> |
| #include <android/util/protobuf.h> |
| #include <binder/IServiceManager.h> |
| #include <debuggerd/client.h> |
| #include <dumputils/dump_utils.h> |
| #include <log/log_event_list.h> |
| #include <log/log_read.h> |
| #include <log/logprint.h> |
| #include <private/android_logger.h> |
| |
| #include "FdBuffer.h" |
| #include "Privacy.h" |
| #include "PrivacyBuffer.h" |
| #include "frameworks/base/core/proto/android/os/backtrace.proto.h" |
| #include "frameworks/base/core/proto/android/os/data.proto.h" |
| #include "frameworks/base/core/proto/android/util/log.proto.h" |
| #include "incidentd_util.h" |
| |
| namespace android { |
| namespace os { |
| namespace incidentd { |
| |
| using namespace android::base; |
| using namespace android::util; |
| |
| // special section ids |
| const int FIELD_ID_INCIDENT_HEADER = 1; |
| const int FIELD_ID_INCIDENT_METADATA = 2; |
| |
| // incident section parameters |
| const char INCIDENT_HELPER[] = "/system/bin/incident_helper"; |
| const char* GZIP[] = {"/system/bin/gzip", NULL}; |
| |
| static pid_t fork_execute_incident_helper(const int id, Fpipe* p2cPipe, Fpipe* c2pPipe) { |
| const char* ihArgs[]{INCIDENT_HELPER, "-s", String8::format("%d", id).string(), NULL}; |
| return fork_execute_cmd(const_cast<char**>(ihArgs), p2cPipe, c2pPipe); |
| } |
| |
| // ================================================================================ |
| static status_t write_section_header(int fd, int sectionId, size_t size) { |
| uint8_t buf[20]; |
| uint8_t* p = write_length_delimited_tag_header(buf, sectionId, size); |
| return WriteFully(fd, buf, p - buf) ? NO_ERROR : -errno; |
| } |
| |
| static void write_section_stats(IncidentMetadata::SectionStats* stats, const FdBuffer& buffer) { |
| stats->set_dump_size_bytes(buffer.data().size()); |
| stats->set_dump_duration_ms(buffer.durationMs()); |
| stats->set_timed_out(buffer.timedOut()); |
| stats->set_is_truncated(buffer.truncated()); |
| } |
| |
| // Reads data from FdBuffer and writes it to the requests file descriptor. |
| static status_t write_report_requests(const int id, const FdBuffer& buffer, |
| ReportRequestSet* requests) { |
| status_t err = -EBADF; |
| EncodedBuffer::iterator data = buffer.data(); |
| PrivacyBuffer privacyBuffer(get_privacy_of_section(id), data); |
| int writeable = 0; |
| |
| // The streaming ones, group requests by spec in order to save unnecessary strip operations |
| map<PrivacySpec, vector<sp<ReportRequest>>> requestsBySpec; |
| for (auto it = requests->begin(); it != requests->end(); it++) { |
| sp<ReportRequest> request = *it; |
| if (!request->ok() || !request->args.containsSection(id)) { |
| continue; // skip invalid request |
| } |
| PrivacySpec spec = PrivacySpec::new_spec(request->args.dest()); |
| requestsBySpec[spec].push_back(request); |
| } |
| |
| for (auto mit = requestsBySpec.begin(); mit != requestsBySpec.end(); mit++) { |
| PrivacySpec spec = mit->first; |
| err = privacyBuffer.strip(spec); |
| if (err != NO_ERROR) return err; // it means the privacyBuffer data is corrupted. |
| if (privacyBuffer.size() == 0) continue; |
| |
| for (auto it = mit->second.begin(); it != mit->second.end(); it++) { |
| sp<ReportRequest> request = *it; |
| err = write_section_header(request->fd, id, privacyBuffer.size()); |
| if (err != NO_ERROR) { |
| request->err = err; |
| continue; |
| } |
| err = privacyBuffer.flush(request->fd); |
| if (err != NO_ERROR) { |
| request->err = err; |
| continue; |
| } |
| writeable++; |
| VLOG("Section %d flushed %zu bytes to fd %d with spec %d", id, privacyBuffer.size(), |
| request->fd, spec.dest); |
| } |
| privacyBuffer.clear(); |
| } |
| |
| // The dropbox file |
| if (requests->mainFd() >= 0) { |
| PrivacySpec spec = PrivacySpec::new_spec(requests->mainDest()); |
| err = privacyBuffer.strip(spec); |
| if (err != NO_ERROR) return err; // the buffer data is corrupted. |
| if (privacyBuffer.size() == 0) goto DONE; |
| |
| err = write_section_header(requests->mainFd(), id, privacyBuffer.size()); |
| if (err != NO_ERROR) { |
| requests->setMainFd(-1); |
| goto DONE; |
| } |
| err = privacyBuffer.flush(requests->mainFd()); |
| if (err != NO_ERROR) { |
| requests->setMainFd(-1); |
| goto DONE; |
| } |
| writeable++; |
| VLOG("Section %d flushed %zu bytes to dropbox %d with spec %d", id, privacyBuffer.size(), |
| requests->mainFd(), spec.dest); |
| // Reports bytes of the section uploaded via dropbox after filtering. |
| requests->sectionStats(id)->set_report_size_bytes(privacyBuffer.size()); |
| } |
| |
| DONE: |
| // only returns error if there is no fd to write to. |
| return writeable > 0 ? NO_ERROR : err; |
| } |
| |
| // ================================================================================ |
| Section::Section(int i, int64_t timeoutMs, bool deviceSpecific) |
| : id(i), timeoutMs(timeoutMs), deviceSpecific(deviceSpecific) {} |
| |
| Section::~Section() {} |
| |
| // ================================================================================ |
| HeaderSection::HeaderSection() : Section(FIELD_ID_INCIDENT_HEADER, 0) {} |
| |
| HeaderSection::~HeaderSection() {} |
| |
| status_t HeaderSection::Execute(ReportRequestSet* requests) const { |
| for (ReportRequestSet::iterator it = requests->begin(); it != requests->end(); it++) { |
| const sp<ReportRequest> request = *it; |
| const vector<vector<uint8_t>>& headers = request->args.headers(); |
| |
| for (vector<vector<uint8_t>>::const_iterator buf = headers.begin(); buf != headers.end(); |
| buf++) { |
| if (buf->empty()) continue; |
| |
| // So the idea is only requests with negative fd are written to dropbox file. |
| int fd = request->fd >= 0 ? request->fd : requests->mainFd(); |
| write_section_header(fd, id, buf->size()); |
| WriteFully(fd, (uint8_t const*)buf->data(), buf->size()); |
| // If there was an error now, there will be an error later and we will remove |
| // it from the list then. |
| } |
| } |
| return NO_ERROR; |
| } |
| // ================================================================================ |
| MetadataSection::MetadataSection() : Section(FIELD_ID_INCIDENT_METADATA, 0) {} |
| |
| MetadataSection::~MetadataSection() {} |
| |
| status_t MetadataSection::Execute(ReportRequestSet* requests) const { |
| ProtoOutputStream proto; |
| IncidentMetadata metadata = requests->metadata(); |
| proto.write(FIELD_TYPE_ENUM | IncidentMetadata::kDestFieldNumber, metadata.dest()); |
| proto.write(FIELD_TYPE_INT32 | IncidentMetadata::kRequestSizeFieldNumber, |
| metadata.request_size()); |
| proto.write(FIELD_TYPE_BOOL | IncidentMetadata::kUseDropboxFieldNumber, metadata.use_dropbox()); |
| for (auto iter = requests->allSectionStats().begin(); iter != requests->allSectionStats().end(); |
| iter++) { |
| IncidentMetadata::SectionStats stats = iter->second; |
| uint64_t token = proto.start(FIELD_TYPE_MESSAGE | IncidentMetadata::kSectionsFieldNumber); |
| proto.write(FIELD_TYPE_INT32 | IncidentMetadata::SectionStats::kIdFieldNumber, stats.id()); |
| proto.write(FIELD_TYPE_BOOL | IncidentMetadata::SectionStats::kSuccessFieldNumber, |
| stats.success()); |
| proto.write(FIELD_TYPE_INT32 | IncidentMetadata::SectionStats::kReportSizeBytesFieldNumber, |
| stats.report_size_bytes()); |
| proto.write(FIELD_TYPE_INT64 | IncidentMetadata::SectionStats::kExecDurationMsFieldNumber, |
| stats.exec_duration_ms()); |
| proto.write(FIELD_TYPE_INT32 | IncidentMetadata::SectionStats::kDumpSizeBytesFieldNumber, |
| stats.dump_size_bytes()); |
| proto.write(FIELD_TYPE_INT64 | IncidentMetadata::SectionStats::kDumpDurationMsFieldNumber, |
| stats.dump_duration_ms()); |
| proto.write(FIELD_TYPE_BOOL | IncidentMetadata::SectionStats::kTimedOutFieldNumber, |
| stats.timed_out()); |
| proto.write(FIELD_TYPE_BOOL | IncidentMetadata::SectionStats::kIsTruncatedFieldNumber, |
| stats.is_truncated()); |
| proto.end(token); |
| } |
| |
| for (ReportRequestSet::iterator it = requests->begin(); it != requests->end(); it++) { |
| const sp<ReportRequest> request = *it; |
| if (request->fd < 0 || request->err != NO_ERROR) { |
| continue; |
| } |
| write_section_header(request->fd, id, proto.size()); |
| if (!proto.flush(request->fd)) { |
| ALOGW("Failed to write metadata to fd %d", request->fd); |
| // we don't fail if we can't write to a single request's fd. |
| } |
| } |
| if (requests->mainFd() >= 0) { |
| write_section_header(requests->mainFd(), id, proto.size()); |
| if (!proto.flush(requests->mainFd())) { |
| ALOGW("Failed to write metadata to dropbox fd %d", requests->mainFd()); |
| return -1; |
| } |
| } |
| return NO_ERROR; |
| } |
| // ================================================================================ |
| static inline bool isSysfs(const char* filename) { return strncmp(filename, "/sys/", 5) == 0; } |
| |
| FileSection::FileSection(int id, const char* filename, const bool deviceSpecific, |
| const int64_t timeoutMs) |
| : Section(id, timeoutMs, deviceSpecific), mFilename(filename) { |
| name = "file "; |
| name += filename; |
| mIsSysfs = isSysfs(filename); |
| } |
| |
| FileSection::~FileSection() {} |
| |
| status_t FileSection::Execute(ReportRequestSet* requests) const { |
| // read from mFilename first, make sure the file is available |
| // add O_CLOEXEC to make sure it is closed when exec incident helper |
| unique_fd fd(open(mFilename, O_RDONLY | O_CLOEXEC)); |
| if (fd.get() == -1) { |
| ALOGW("[%s] failed to open file", this->name.string()); |
| return this->deviceSpecific ? NO_ERROR : -errno; |
| } |
| |
| FdBuffer buffer; |
| Fpipe p2cPipe; |
| Fpipe c2pPipe; |
| // initiate pipes to pass data to/from incident_helper |
| if (!p2cPipe.init() || !c2pPipe.init()) { |
| ALOGW("[%s] failed to setup pipes", this->name.string()); |
| return -errno; |
| } |
| |
| pid_t pid = fork_execute_incident_helper(this->id, &p2cPipe, &c2pPipe); |
| if (pid == -1) { |
| ALOGW("[%s] failed to fork", this->name.string()); |
| return -errno; |
| } |
| |
| // parent process |
| status_t readStatus = buffer.readProcessedDataInStream(fd.get(), std::move(p2cPipe.writeFd()), |
| std::move(c2pPipe.readFd()), |
| this->timeoutMs, mIsSysfs); |
| write_section_stats(requests->sectionStats(this->id), buffer); |
| if (readStatus != NO_ERROR || buffer.timedOut()) { |
| ALOGW("[%s] failed to read data from incident helper: %s, timedout: %s", |
| this->name.string(), strerror(-readStatus), buffer.timedOut() ? "true" : "false"); |
| kill_child(pid); |
| return readStatus; |
| } |
| |
| status_t ihStatus = wait_child(pid); |
| if (ihStatus != NO_ERROR) { |
| ALOGW("[%s] abnormal child process: %s", this->name.string(), strerror(-ihStatus)); |
| return ihStatus; |
| } |
| |
| return write_report_requests(this->id, buffer, requests); |
| } |
| // ================================================================================ |
| GZipSection::GZipSection(int id, const char* filename, ...) : Section(id) { |
| va_list args; |
| va_start(args, filename); |
| mFilenames = varargs(filename, args); |
| va_end(args); |
| name = "gzip"; |
| for (int i = 0; mFilenames[i] != NULL; i++) { |
| name += " "; |
| name += mFilenames[i]; |
| } |
| } |
| |
| GZipSection::~GZipSection() { free(mFilenames); } |
| |
| status_t GZipSection::Execute(ReportRequestSet* requests) const { |
| // Reads the files in order, use the first available one. |
| int index = 0; |
| unique_fd fd; |
| while (mFilenames[index] != NULL) { |
| fd.reset(open(mFilenames[index], O_RDONLY | O_CLOEXEC)); |
| if (fd.get() != -1) { |
| break; |
| } |
| ALOGW("GZipSection failed to open file %s", mFilenames[index]); |
| index++; // look at the next file. |
| } |
| if (fd.get() == -1) { |
| ALOGW("[%s] can't open all the files", this->name.string()); |
| return NO_ERROR; // e.g. LAST_KMSG will reach here in user build. |
| } |
| FdBuffer buffer; |
| Fpipe p2cPipe; |
| Fpipe c2pPipe; |
| // initiate pipes to pass data to/from gzip |
| if (!p2cPipe.init() || !c2pPipe.init()) { |
| ALOGW("[%s] failed to setup pipes", this->name.string()); |
| return -errno; |
| } |
| |
| pid_t pid = fork_execute_cmd((char* const*)GZIP, &p2cPipe, &c2pPipe); |
| if (pid == -1) { |
| ALOGW("[%s] failed to fork", this->name.string()); |
| return -errno; |
| } |
| // parent process |
| |
| // construct Fdbuffer to output GZippedfileProto, the reason to do this instead of using |
| // ProtoOutputStream is to avoid allocation of another buffer inside ProtoOutputStream. |
| EncodedBuffer* internalBuffer = buffer.getInternalBuffer(); |
| internalBuffer->writeHeader((uint32_t)GZippedFileProto::FILENAME, WIRE_TYPE_LENGTH_DELIMITED); |
| size_t fileLen = strlen(mFilenames[index]); |
| internalBuffer->writeRawVarint32(fileLen); |
| for (size_t i = 0; i < fileLen; i++) { |
| internalBuffer->writeRawByte(mFilenames[index][i]); |
| } |
| internalBuffer->writeHeader((uint32_t)GZippedFileProto::GZIPPED_DATA, |
| WIRE_TYPE_LENGTH_DELIMITED); |
| size_t editPos = internalBuffer->wp()->pos(); |
| internalBuffer->wp()->move(8); // reserve 8 bytes for the varint of the data size. |
| size_t dataBeginAt = internalBuffer->wp()->pos(); |
| VLOG("[%s] editPos=%zu, dataBeginAt=%zu", this->name.string(), editPos, dataBeginAt); |
| |
| status_t readStatus = buffer.readProcessedDataInStream( |
| fd.get(), std::move(p2cPipe.writeFd()), std::move(c2pPipe.readFd()), this->timeoutMs, |
| isSysfs(mFilenames[index])); |
| write_section_stats(requests->sectionStats(this->id), buffer); |
| if (readStatus != NO_ERROR || buffer.timedOut()) { |
| ALOGW("[%s] failed to read data from gzip: %s, timedout: %s", this->name.string(), |
| strerror(-readStatus), buffer.timedOut() ? "true" : "false"); |
| kill_child(pid); |
| return readStatus; |
| } |
| |
| status_t gzipStatus = wait_child(pid); |
| if (gzipStatus != NO_ERROR) { |
| ALOGW("[%s] abnormal child process: %s", this->name.string(), strerror(-gzipStatus)); |
| return gzipStatus; |
| } |
| // Revisit the actual size from gzip result and edit the internal buffer accordingly. |
| size_t dataSize = buffer.size() - dataBeginAt; |
| internalBuffer->wp()->rewind()->move(editPos); |
| internalBuffer->writeRawVarint32(dataSize); |
| internalBuffer->copy(dataBeginAt, dataSize); |
| |
| return write_report_requests(this->id, buffer, requests); |
| } |
| |
| // ================================================================================ |
| struct WorkerThreadData : public virtual RefBase { |
| const WorkerThreadSection* section; |
| Fpipe pipe; |
| |
| // Lock protects these fields |
| mutex lock; |
| bool workerDone; |
| status_t workerError; |
| |
| WorkerThreadData(const WorkerThreadSection* section); |
| virtual ~WorkerThreadData(); |
| }; |
| |
| WorkerThreadData::WorkerThreadData(const WorkerThreadSection* sec) |
| : section(sec), workerDone(false), workerError(NO_ERROR) {} |
| |
| WorkerThreadData::~WorkerThreadData() {} |
| |
| // ================================================================================ |
| WorkerThreadSection::WorkerThreadSection(int id, const int64_t timeoutMs) |
| : Section(id, timeoutMs) {} |
| |
| WorkerThreadSection::~WorkerThreadSection() {} |
| |
| static void* worker_thread_func(void* cookie) { |
| WorkerThreadData* data = (WorkerThreadData*)cookie; |
| status_t err = data->section->BlockingCall(data->pipe.writeFd().get()); |
| |
| { |
| unique_lock<mutex> lock(data->lock); |
| data->workerDone = true; |
| data->workerError = err; |
| } |
| |
| data->pipe.writeFd().reset(); |
| data->decStrong(data->section); |
| // data might be gone now. don't use it after this point in this thread. |
| return NULL; |
| } |
| |
| status_t WorkerThreadSection::Execute(ReportRequestSet* requests) const { |
| status_t err = NO_ERROR; |
| pthread_t thread; |
| pthread_attr_t attr; |
| bool timedOut = false; |
| FdBuffer buffer; |
| |
| // Data shared between this thread and the worker thread. |
| sp<WorkerThreadData> data = new WorkerThreadData(this); |
| |
| // Create the pipe |
| if (!data->pipe.init()) { |
| return -errno; |
| } |
| |
| // The worker thread needs a reference and we can't let the count go to zero |
| // if that thread is slow to start. |
| data->incStrong(this); |
| |
| // Create the thread |
| err = pthread_attr_init(&attr); |
| if (err != 0) { |
| return -err; |
| } |
| // TODO: Do we need to tweak thread priority? |
| err = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
| if (err != 0) { |
| pthread_attr_destroy(&attr); |
| return -err; |
| } |
| err = pthread_create(&thread, &attr, worker_thread_func, (void*)data.get()); |
| if (err != 0) { |
| pthread_attr_destroy(&attr); |
| return -err; |
| } |
| pthread_attr_destroy(&attr); |
| |
| // Loop reading until either the timeout or the worker side is done (i.e. eof). |
| err = buffer.read(data->pipe.readFd().get(), this->timeoutMs); |
| if (err != NO_ERROR) { |
| // TODO: Log this error into the incident report. |
| ALOGW("[%s] reader failed with error '%s'", this->name.string(), strerror(-err)); |
| } |
| |
| // Done with the read fd. The worker thread closes the write one so |
| // we never race and get here first. |
| data->pipe.readFd().reset(); |
| |
| // If the worker side is finished, then return its error (which may overwrite |
| // our possible error -- but it's more interesting anyway). If not, then we timed out. |
| { |
| unique_lock<mutex> lock(data->lock); |
| if (!data->workerDone) { |
| // We timed out |
| timedOut = true; |
| } else { |
| if (data->workerError != NO_ERROR) { |
| err = data->workerError; |
| // TODO: Log this error into the incident report. |
| ALOGW("[%s] worker failed with error '%s'", this->name.string(), strerror(-err)); |
| } |
| } |
| } |
| write_section_stats(requests->sectionStats(this->id), buffer); |
| if (timedOut || buffer.timedOut()) { |
| ALOGW("[%s] timed out", this->name.string()); |
| return NO_ERROR; |
| } |
| |
| // TODO: There was an error with the command or buffering. Report that. For now |
| // just exit with a log messasge. |
| if (err != NO_ERROR) { |
| ALOGW("[%s] failed with error '%s'", this->name.string(), strerror(-err)); |
| return NO_ERROR; |
| } |
| |
| // Write the data that was collected |
| return write_report_requests(this->id, buffer, requests); |
| } |
| |
| // ================================================================================ |
| CommandSection::CommandSection(int id, const int64_t timeoutMs, const char* command, ...) |
| : Section(id, timeoutMs) { |
| va_list args; |
| va_start(args, command); |
| mCommand = varargs(command, args); |
| va_end(args); |
| name = "cmd"; |
| for (int i = 0; mCommand[i] != NULL; i++) { |
| name += " "; |
| name += mCommand[i]; |
| } |
| } |
| |
| CommandSection::CommandSection(int id, const char* command, ...) : Section(id) { |
| va_list args; |
| va_start(args, command); |
| mCommand = varargs(command, args); |
| va_end(args); |
| name = "cmd"; |
| for (int i = 0; mCommand[i] != NULL; i++) { |
| name += " "; |
| name += mCommand[i]; |
| } |
| } |
| |
| CommandSection::~CommandSection() { free(mCommand); } |
| |
| status_t CommandSection::Execute(ReportRequestSet* requests) const { |
| FdBuffer buffer; |
| Fpipe cmdPipe; |
| Fpipe ihPipe; |
| |
| if (!cmdPipe.init() || !ihPipe.init()) { |
| ALOGW("[%s] failed to setup pipes", this->name.string()); |
| return -errno; |
| } |
| |
| pid_t cmdPid = fork_execute_cmd((char* const*)mCommand, NULL, &cmdPipe); |
| if (cmdPid == -1) { |
| ALOGW("[%s] failed to fork", this->name.string()); |
| return -errno; |
| } |
| pid_t ihPid = fork_execute_incident_helper(this->id, &cmdPipe, &ihPipe); |
| if (ihPid == -1) { |
| ALOGW("[%s] failed to fork", this->name.string()); |
| return -errno; |
| } |
| |
| cmdPipe.writeFd().reset(); |
| status_t readStatus = buffer.read(ihPipe.readFd().get(), this->timeoutMs); |
| write_section_stats(requests->sectionStats(this->id), buffer); |
| if (readStatus != NO_ERROR || buffer.timedOut()) { |
| ALOGW("[%s] failed to read data from incident helper: %s, timedout: %s", |
| this->name.string(), strerror(-readStatus), buffer.timedOut() ? "true" : "false"); |
| kill_child(cmdPid); |
| kill_child(ihPid); |
| return readStatus; |
| } |
| |
| // Waiting for command here has one trade-off: the failed status of command won't be detected |
| // until buffer timeout, but it has advatage on starting the data stream earlier. |
| status_t cmdStatus = wait_child(cmdPid); |
| status_t ihStatus = wait_child(ihPid); |
| if (cmdStatus != NO_ERROR || ihStatus != NO_ERROR) { |
| ALOGW("[%s] abnormal child processes, return status: command: %s, incident " |
| "helper: %s", |
| this->name.string(), strerror(-cmdStatus), strerror(-ihStatus)); |
| return cmdStatus != NO_ERROR ? cmdStatus : ihStatus; |
| } |
| |
| return write_report_requests(this->id, buffer, requests); |
| } |
| |
| // ================================================================================ |
| DumpsysSection::DumpsysSection(int id, const char* service, ...) |
| : WorkerThreadSection(id), mService(service) { |
| name = "dumpsys "; |
| name += service; |
| |
| va_list args; |
| va_start(args, service); |
| while (true) { |
| const char* arg = va_arg(args, const char*); |
| if (arg == NULL) { |
| break; |
| } |
| mArgs.add(String16(arg)); |
| name += " "; |
| name += arg; |
| } |
| va_end(args); |
| } |
| |
| DumpsysSection::~DumpsysSection() {} |
| |
| status_t DumpsysSection::BlockingCall(int pipeWriteFd) const { |
| // checkService won't wait for the service to show up like getService will. |
| sp<IBinder> service = defaultServiceManager()->checkService(mService); |
| |
| if (service == NULL) { |
| // Returning an error interrupts the entire incident report, so just |
| // log the failure. |
| // TODO: have a meta record inside the report that would log this |
| // failure inside the report, because the fact that we can't find |
| // the service is good data in and of itself. This is running in |
| // another thread so lock that carefully... |
| ALOGW("DumpsysSection: Can't lookup service: %s", String8(mService).string()); |
| return NO_ERROR; |
| } |
| |
| service->dump(pipeWriteFd, mArgs); |
| |
| return NO_ERROR; |
| } |
| |
| // ================================================================================ |
| // initialization only once in Section.cpp. |
| map<log_id_t, log_time> LogSection::gLastLogsRetrieved; |
| |
| LogSection::LogSection(int id, log_id_t logID) : WorkerThreadSection(id), mLogID(logID) { |
| name = "logcat "; |
| name += android_log_id_to_name(logID); |
| switch (logID) { |
| case LOG_ID_EVENTS: |
| case LOG_ID_STATS: |
| case LOG_ID_SECURITY: |
| mBinary = true; |
| break; |
| default: |
| mBinary = false; |
| } |
| } |
| |
| LogSection::~LogSection() {} |
| |
| static size_t trimTail(char const* buf, size_t len) { |
| while (len > 0) { |
| char c = buf[len - 1]; |
| if (c == '\0' || c == ' ' || c == '\n' || c == '\r' || c == ':') { |
| len--; |
| } else { |
| break; |
| } |
| } |
| return len; |
| } |
| |
| static inline int32_t get4LE(uint8_t const* src) { |
| return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24); |
| } |
| |
| status_t LogSection::BlockingCall(int pipeWriteFd) const { |
| // Open log buffer and getting logs since last retrieved time if any. |
| unique_ptr<logger_list, void (*)(logger_list*)> loggers( |
| gLastLogsRetrieved.find(mLogID) == gLastLogsRetrieved.end() |
| ? android_logger_list_alloc(ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 0, 0) |
| : android_logger_list_alloc_time(ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, |
| gLastLogsRetrieved[mLogID], 0), |
| android_logger_list_free); |
| |
| if (android_logger_open(loggers.get(), mLogID) == NULL) { |
| ALOGE("[%s] Can't get logger.", this->name.string()); |
| return -1; |
| } |
| |
| log_msg msg; |
| log_time lastTimestamp(0); |
| |
| ProtoOutputStream proto; |
| while (true) { // keeps reading until logd buffer is fully read. |
| status_t err = android_logger_list_read(loggers.get(), &msg); |
| // err = 0 - no content, unexpected connection drop or EOF. |
| // err = +ive number - size of retrieved data from logger |
| // err = -ive number, OS supplied error _except_ for -EAGAIN |
| // err = -EAGAIN, graceful indication for ANDRODI_LOG_NONBLOCK that this is the end of data. |
| if (err <= 0) { |
| if (err != -EAGAIN) { |
| ALOGW("[%s] fails to read a log_msg.\n", this->name.string()); |
| } |
| // dump previous logs and don't consider this error a failure. |
| break; |
| } |
| if (mBinary) { |
| // remove the first uint32 which is tag's index in event log tags |
| android_log_context context = create_android_log_parser(msg.msg() + sizeof(uint32_t), |
| msg.len() - sizeof(uint32_t)); |
| ; |
| android_log_list_element elem; |
| |
| lastTimestamp.tv_sec = msg.entry_v1.sec; |
| lastTimestamp.tv_nsec = msg.entry_v1.nsec; |
| |
| // format a BinaryLogEntry |
| uint64_t token = proto.start(LogProto::BINARY_LOGS); |
| proto.write(BinaryLogEntry::SEC, msg.entry_v1.sec); |
| proto.write(BinaryLogEntry::NANOSEC, msg.entry_v1.nsec); |
| proto.write(BinaryLogEntry::UID, (int)msg.entry_v4.uid); |
| proto.write(BinaryLogEntry::PID, msg.entry_v1.pid); |
| proto.write(BinaryLogEntry::TID, msg.entry_v1.tid); |
| proto.write(BinaryLogEntry::TAG_INDEX, |
| get4LE(reinterpret_cast<uint8_t const*>(msg.msg()))); |
| do { |
| elem = android_log_read_next(context); |
| uint64_t elemToken = proto.start(BinaryLogEntry::ELEMS); |
| switch (elem.type) { |
| case EVENT_TYPE_INT: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_INT); |
| proto.write(BinaryLogEntry::Elem::VAL_INT32, (int)elem.data.int32); |
| break; |
| case EVENT_TYPE_LONG: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_LONG); |
| proto.write(BinaryLogEntry::Elem::VAL_INT64, (long long)elem.data.int64); |
| break; |
| case EVENT_TYPE_STRING: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_STRING); |
| proto.write(BinaryLogEntry::Elem::VAL_STRING, elem.data.string, elem.len); |
| break; |
| case EVENT_TYPE_FLOAT: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_FLOAT); |
| proto.write(BinaryLogEntry::Elem::VAL_FLOAT, elem.data.float32); |
| break; |
| case EVENT_TYPE_LIST: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_LIST); |
| break; |
| case EVENT_TYPE_LIST_STOP: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_LIST_STOP); |
| break; |
| case EVENT_TYPE_UNKNOWN: |
| proto.write(BinaryLogEntry::Elem::TYPE, |
| BinaryLogEntry::Elem::EVENT_TYPE_UNKNOWN); |
| break; |
| } |
| proto.end(elemToken); |
| } while ((elem.type != EVENT_TYPE_UNKNOWN) && !elem.complete); |
| proto.end(token); |
| if (context) { |
| android_log_destroy(&context); |
| } |
| } else { |
| AndroidLogEntry entry; |
| err = android_log_processLogBuffer(&msg.entry_v1, &entry); |
| if (err != NO_ERROR) { |
| ALOGW("[%s] fails to process to an entry.\n", this->name.string()); |
| break; |
| } |
| lastTimestamp.tv_sec = entry.tv_sec; |
| lastTimestamp.tv_nsec = entry.tv_nsec; |
| |
| // format a TextLogEntry |
| uint64_t token = proto.start(LogProto::TEXT_LOGS); |
| proto.write(TextLogEntry::SEC, (long long)entry.tv_sec); |
| proto.write(TextLogEntry::NANOSEC, (long long)entry.tv_nsec); |
| proto.write(TextLogEntry::PRIORITY, (int)entry.priority); |
| proto.write(TextLogEntry::UID, entry.uid); |
| proto.write(TextLogEntry::PID, entry.pid); |
| proto.write(TextLogEntry::TID, entry.tid); |
| proto.write(TextLogEntry::TAG, entry.tag, trimTail(entry.tag, entry.tagLen)); |
| proto.write(TextLogEntry::LOG, entry.message, |
| trimTail(entry.message, entry.messageLen)); |
| proto.end(token); |
| } |
| } |
| gLastLogsRetrieved[mLogID] = lastTimestamp; |
| proto.flush(pipeWriteFd); |
| return NO_ERROR; |
| } |
| |
| // ================================================================================ |
| |
| TombstoneSection::TombstoneSection(int id, const char* type, const int64_t timeoutMs) |
| : WorkerThreadSection(id, timeoutMs), mType(type) { |
| name = "tombstone "; |
| name += type; |
| } |
| |
| TombstoneSection::~TombstoneSection() {} |
| |
| status_t TombstoneSection::BlockingCall(int pipeWriteFd) const { |
| std::unique_ptr<DIR, decltype(&closedir)> proc(opendir("/proc"), closedir); |
| if (proc.get() == nullptr) { |
| ALOGE("opendir /proc failed: %s\n", strerror(errno)); |
| return -errno; |
| } |
| |
| const std::set<int> hal_pids = get_interesting_hal_pids(); |
| |
| ProtoOutputStream proto; |
| struct dirent* d; |
| status_t err = NO_ERROR; |
| while ((d = readdir(proc.get()))) { |
| int pid = atoi(d->d_name); |
| if (pid <= 0) { |
| continue; |
| } |
| |
| const std::string link_name = android::base::StringPrintf("/proc/%d/exe", pid); |
| std::string exe; |
| if (!android::base::Readlink(link_name, &exe)) { |
| ALOGE("Can't read '%s': %s\n", link_name.c_str(), strerror(errno)); |
| continue; |
| } |
| |
| bool is_java_process; |
| if (exe == "/system/bin/app_process32" || exe == "/system/bin/app_process64") { |
| if (mType != "java") continue; |
| // Don't bother dumping backtraces for the zygote. |
| if (IsZygote(pid)) { |
| VLOG("Skipping Zygote"); |
| continue; |
| } |
| |
| is_java_process = true; |
| } else if (should_dump_native_traces(exe.c_str())) { |
| if (mType != "native") continue; |
| is_java_process = false; |
| } else if (hal_pids.find(pid) != hal_pids.end()) { |
| if (mType != "hal") continue; |
| is_java_process = false; |
| } else { |
| // Probably a native process we don't care about, continue. |
| VLOG("Skipping %d", pid); |
| continue; |
| } |
| |
| Fpipe dumpPipe; |
| if (!dumpPipe.init()) { |
| ALOGW("[%s] failed to setup dump pipe", this->name.string()); |
| err = -errno; |
| break; |
| } |
| |
| const uint64_t start = Nanotime(); |
| pid_t child = fork(); |
| if (child < 0) { |
| ALOGE("Failed to fork child process"); |
| break; |
| } else if (child == 0) { |
| // This is the child process. |
| dumpPipe.readFd().reset(); |
| const int ret = dump_backtrace_to_file_timeout( |
| pid, is_java_process ? kDebuggerdJavaBacktrace : kDebuggerdNativeBacktrace, |
| is_java_process ? 5 : 20, dumpPipe.writeFd().get()); |
| if (ret == -1) { |
| if (errno == 0) { |
| ALOGW("Dumping failed for pid '%d', likely due to a timeout\n", pid); |
| } else { |
| ALOGE("Dumping failed for pid '%d': %s\n", pid, strerror(errno)); |
| } |
| } |
| dumpPipe.writeFd().reset(); |
| _exit(EXIT_SUCCESS); |
| } |
| dumpPipe.writeFd().reset(); |
| // Parent process. |
| // Read from the pipe concurrently to avoid blocking the child. |
| FdBuffer buffer; |
| err = buffer.readFully(dumpPipe.readFd().get()); |
| if (err != NO_ERROR) { |
| ALOGW("[%s] failed to read stack dump: %d", this->name.string(), err); |
| dumpPipe.readFd().reset(); |
| break; |
| } |
| |
| auto dump = std::make_unique<char[]>(buffer.size()); |
| auto iterator = buffer.data(); |
| int i = 0; |
| while (iterator.hasNext()) { |
| dump[i] = iterator.next(); |
| i++; |
| } |
| uint64_t token = proto.start(android::os::BackTraceProto::TRACES); |
| proto.write(android::os::BackTraceProto::Stack::PID, pid); |
| proto.write(android::os::BackTraceProto::Stack::DUMP, dump.get(), i); |
| proto.write(android::os::BackTraceProto::Stack::DUMP_DURATION_NS, |
| static_cast<long long>(Nanotime() - start)); |
| proto.end(token); |
| dumpPipe.readFd().reset(); |
| } |
| |
| proto.flush(pipeWriteFd); |
| return err; |
| } |
| |
| } // namespace incidentd |
| } // namespace os |
| } // namespace android |