| /* |
| * Copyright (C) 2019 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. |
| */ |
| |
| #include "src/trace_processor/fuchsia_trace_tokenizer.h" |
| |
| #include <inttypes.h> |
| #include <unordered_map> |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/base/string_view.h" |
| #include "src/trace_processor/ftrace_utils.h" |
| #include "src/trace_processor/fuchsia_provider_view.h" |
| #include "src/trace_processor/process_tracker.h" |
| #include "src/trace_processor/slice_tracker.h" |
| #include "src/trace_processor/trace_processor_context.h" |
| #include "src/trace_processor/trace_sorter.h" |
| |
| namespace perfetto { |
| namespace trace_processor { |
| |
| namespace { |
| // Record types |
| constexpr uint32_t kMetadata = 0; |
| constexpr uint32_t kInitialization = 1; |
| constexpr uint32_t kString = 2; |
| constexpr uint32_t kThread = 3; |
| constexpr uint32_t kEvent = 4; |
| constexpr uint32_t kKernelObject = 7; |
| constexpr uint32_t kContextSwitch = 8; |
| |
| // Metadata types |
| constexpr uint32_t kProviderInfo = 1; |
| constexpr uint32_t kProviderSection = 2; |
| constexpr uint32_t kProviderEvent = 3; |
| |
| // Thread states |
| constexpr uint32_t kThreadNew = 0; |
| constexpr uint32_t kThreadRunning = 1; |
| constexpr uint32_t kThreadSuspended = 2; |
| constexpr uint32_t kThreadBlocked = 3; |
| constexpr uint32_t kThreadDying = 4; |
| constexpr uint32_t kThreadDead = 5; |
| |
| // Zircon object types |
| constexpr uint32_t kZxObjTypeProcess = 1; |
| constexpr uint32_t kZxObjTypeThread = 2; |
| |
| // Argument types |
| constexpr uint32_t kArgKernelObject = 8; |
| } // namespace |
| |
| FuchsiaTraceTokenizer::FuchsiaTraceTokenizer(TraceProcessorContext* context) |
| : context_(context) { |
| RegisterProvider(0, ""); |
| } |
| |
| FuchsiaTraceTokenizer::~FuchsiaTraceTokenizer() = default; |
| |
| bool FuchsiaTraceTokenizer::Parse(std::unique_ptr<uint8_t[]> data, |
| size_t size) { |
| // The relevant internal state is |leftover_bytes_|. Each call to Parse should |
| // maintain the following properties, unless a fatal error occurs in which |
| // case it should return false and no assumptions should be made about the |
| // resulting internal state: |
| // |
| // 1) Every byte passed to |Parse| has either been passed to |ParseRecord| or |
| // is present in |leftover_bytes_|, but not both. |
| // 2) |leftover_bytes_| does not contain a complete record. |
| // |
| // Parse is responsible for creating the "full" |TraceBlobView|s, which own |
| // the underlying data. Generally, there will be one such view. However, if |
| // there is a record that started in an earlier call, then a new buffer is |
| // created here to make the bytes in that record contiguous. |
| // |
| // Because some of the bytes in |data| might belong to the record starting in |
| // |leftover_bytes_|, we track the offset at which the following record will |
| // start. |
| size_t byte_offset = 0; |
| |
| // Look for a record starting with the leftover bytes. |
| if (leftover_bytes_.size() + size < 8) { |
| // Even with the new bytes, we can't even read the header of the next |
| // record, so just add the new bytes to |leftover_bytes_| and return. |
| leftover_bytes_.insert(leftover_bytes_.end(), data.get() + byte_offset, |
| data.get() + size); |
| return true; |
| } |
| if (leftover_bytes_.size() > 0) { |
| // There is a record starting from leftover bytes. |
| if (leftover_bytes_.size() < 8) { |
| // Header was previously incomplete, but we have enough now. |
| // Copy bytes into |leftover_bytes_| so that the whole header is present, |
| // and update |byte_offset| and |size| accordingly. |
| size_t needed_bytes = 8 - leftover_bytes_.size(); |
| leftover_bytes_.insert(leftover_bytes_.end(), data.get() + byte_offset, |
| data.get() + needed_bytes); |
| byte_offset += needed_bytes; |
| size -= needed_bytes; |
| } |
| // Read the record length from the header. |
| uint64_t header = |
| *reinterpret_cast<const uint64_t*>(leftover_bytes_.data()); |
| uint32_t record_len_words = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 4, 15); |
| uint32_t record_len_bytes = record_len_words * sizeof(uint64_t); |
| |
| // From property (2) above, leftover_bytes_ must have had less than a full |
| // record to start with. We padded leftover_bytes_ out to read the header, |
| // so it may now be a full record (in the case that the record consists of |
| // only the header word), but it still cannot have any extra bytes. |
| PERFETTO_DCHECK(leftover_bytes_.size() <= record_len_bytes); |
| size_t missing_bytes = record_len_bytes - leftover_bytes_.size(); |
| |
| if (missing_bytes <= size) { |
| // We have enough bytes to complete the partial record. Create a new |
| // buffer for that record. |
| std::unique_ptr<uint8_t[]> buf(new uint8_t[record_len_bytes]); |
| memcpy(&buf[0], leftover_bytes_.data(), leftover_bytes_.size()); |
| memcpy(&buf[leftover_bytes_.size()], &data[byte_offset], missing_bytes); |
| byte_offset += missing_bytes; |
| size -= missing_bytes; |
| leftover_bytes_.clear(); |
| |
| TraceBlobView leftover_record(std::move(buf), 0, record_len_bytes); |
| ParseRecord(std::move(leftover_record)); |
| } else { |
| // There are not enough bytes for the full record. Add all the bytes we |
| // have to leftover_bytes_ and wait for more. |
| leftover_bytes_.insert(leftover_bytes_.end(), data.get() + byte_offset, |
| data.get() + byte_offset + size); |
| return true; |
| } |
| } |
| |
| TraceBlobView full_view(std::move(data), byte_offset, size); |
| |
| // |record_offset| is a number of bytes past |byte_offset| where the record |
| // under consideration starts. As a result, it must always be in the range [0, |
| // size-8]. Any larger offset means we don't have enough bytes for the header. |
| size_t record_offset = 0; |
| while (record_offset + 8 <= size) { |
| uint64_t header = |
| *reinterpret_cast<const uint64_t*>(full_view.data() + record_offset); |
| uint32_t record_len_bytes = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 4, 15) * |
| sizeof(uint64_t); |
| if (record_len_bytes == 0) { |
| PERFETTO_DLOG("Unexpected record of size 0"); |
| return false; |
| } |
| |
| if (record_offset + record_len_bytes > size) |
| break; |
| |
| TraceBlobView record = |
| full_view.slice(byte_offset + record_offset, record_len_bytes); |
| ParseRecord(std::move(record)); |
| |
| record_offset += record_len_bytes; |
| } |
| |
| leftover_bytes_.insert(leftover_bytes_.end(), |
| full_view.data() + record_offset, |
| full_view.data() + size); |
| return true; |
| } |
| |
| // Most record types are read and recorded in |TraceStorage| here directly. |
| // Event records are sorted by timestamp before processing, so instead of |
| // recording them in |TraceStorage| they are given to |TraceSorter|. In order to |
| // facilitate the parsing after sorting, a small view of the provider's string |
| // and thread tables is passed alongside the record. See |FuchsiaProviderView|. |
| void FuchsiaTraceTokenizer::ParseRecord(TraceBlobView tbv) { |
| TraceStorage* storage = context_->storage.get(); |
| ProcessTracker* procs = context_->process_tracker.get(); |
| TraceSorter* sorter = context_->sorter.get(); |
| |
| const uint64_t* record = reinterpret_cast<const uint64_t*>(tbv.data()); |
| uint64_t header = *record; |
| |
| uint32_t record_type = fuchsia_trace_utils::ReadField<uint32_t>(header, 0, 3); |
| switch (record_type) { |
| case kMetadata: { |
| uint32_t metadata_type = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 16, 19); |
| switch (metadata_type) { |
| case kProviderInfo: { |
| uint32_t provider_id = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 20, 51); |
| uint32_t name_len = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 52, 59); |
| std::string name(reinterpret_cast<const char*>(&record[1]), name_len); |
| RegisterProvider(provider_id, name); |
| break; |
| } |
| case kProviderSection: { |
| uint32_t provider_id = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 20, 51); |
| current_provider_ = providers_[provider_id].get(); |
| break; |
| } |
| case kProviderEvent: { |
| // TODO(bhamrick): Handle buffer fill events |
| PERFETTO_DLOG( |
| "Ignoring provider event. Events may have been dropped"); |
| break; |
| } |
| } |
| break; |
| } |
| case kInitialization: { |
| current_provider_->ticks_per_second = record[1]; |
| break; |
| } |
| case kString: { |
| uint32_t index = fuchsia_trace_utils::ReadField<uint32_t>(header, 16, 30); |
| if (index != 0) { |
| uint32_t len = fuchsia_trace_utils::ReadField<uint32_t>(header, 32, 46); |
| base::StringView s(reinterpret_cast<const char*>(&record[1]), len); |
| StringId id = storage->InternString(s); |
| current_provider_->string_table[index] = id; |
| } |
| break; |
| } |
| case kThread: { |
| uint32_t index = fuchsia_trace_utils::ReadField<uint32_t>(header, 16, 23); |
| if (index != 0) { |
| fuchsia_trace_utils::ThreadInfo tinfo; |
| tinfo.pid = record[1]; |
| tinfo.tid = record[2]; |
| |
| current_provider_->thread_table[index] = tinfo; |
| } |
| break; |
| } |
| case kEvent: { |
| uint32_t thread_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 24, 31); |
| uint32_t cat_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 32, 47); |
| uint32_t name_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 48, 63); |
| |
| // Build the minimal FuchsiaProviderView needed by |
| // the record. This means the thread information if not inline, and any |
| // non-inline strings (name, category for now, arg names and string values |
| // in the future. |
| const uint64_t* current = &record[1]; |
| auto provider_view = |
| std::unique_ptr<FuchsiaProviderView>(new FuchsiaProviderView()); |
| provider_view->set_ticks_per_second(current_provider_->ticks_per_second); |
| |
| uint64_t ticks = *current++; |
| int64_t ts = fuchsia_trace_utils::TicksToNs( |
| ticks, current_provider_->ticks_per_second); |
| |
| if (fuchsia_trace_utils::IsInlineThread(thread_ref)) { |
| // Skip over inline thread |
| fuchsia_trace_utils::ReadInlineThread(¤t); |
| } else { |
| provider_view->InsertThread( |
| thread_ref, current_provider_->thread_table[thread_ref]); |
| } |
| |
| if (fuchsia_trace_utils::IsInlineString(cat_ref)) { |
| // Skip over inline string |
| fuchsia_trace_utils::ReadInlineString(¤t, cat_ref); |
| } else { |
| provider_view->InsertString(cat_ref, |
| current_provider_->string_table[cat_ref]); |
| } |
| |
| if (fuchsia_trace_utils::IsInlineString(name_ref)) { |
| // Skip over inline string |
| fuchsia_trace_utils::ReadInlineString(¤t, name_ref); |
| } else { |
| provider_view->InsertString(name_ref, |
| current_provider_->string_table[name_ref]); |
| } |
| |
| sorter->PushFuchsiaRecord(ts, std::move(tbv), std::move(provider_view)); |
| |
| break; |
| } |
| case kKernelObject: { |
| uint32_t obj_type = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 16, 23); |
| uint32_t name_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 24, 39); |
| |
| const uint64_t* current = &record[1]; |
| uint64_t obj_id = *current++; |
| |
| StringId name = StringId(); |
| if (fuchsia_trace_utils::IsInlineString(name_ref)) { |
| name = storage->InternString( |
| fuchsia_trace_utils::ReadInlineString(¤t, name_ref)); |
| } else { |
| name = current_provider_->string_table[name_ref]; |
| } |
| |
| switch (obj_type) { |
| case kZxObjTypeProcess: { |
| // Note: Fuchsia pid/tids are 64 bits but Perfetto's tables only |
| // support 32 bits. This is usually not an issue except for |
| // artificial koids which have the 2^63 bit set. This is used for |
| // things such as virtual threads. |
| procs->UpdateProcess(static_cast<uint32_t>(obj_id), |
| base::Optional<uint32_t>(), |
| base::StringView(storage->GetString(name))); |
| break; |
| } |
| case kZxObjTypeThread: { |
| uint32_t n_args = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 40, 43); |
| uint64_t pid = 0; |
| |
| // Scan for a Kernel Object argument named "process" |
| for (uint32_t i = 0; i < n_args; i++) { |
| const uint64_t* arg_base = current; |
| uint64_t arg_header = *current++; |
| uint32_t arg_type = |
| fuchsia_trace_utils::ReadField<uint32_t>(arg_header, 0, 3); |
| uint32_t arg_size = |
| fuchsia_trace_utils::ReadField<uint32_t>(arg_header, 4, 15); |
| if (arg_type == kArgKernelObject) { |
| uint32_t arg_name_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(arg_header, 16, 31); |
| base::StringView arg_name; |
| if (fuchsia_trace_utils::IsInlineString(arg_name_ref)) { |
| arg_name = fuchsia_trace_utils::ReadInlineString(¤t, |
| arg_name_ref); |
| } else { |
| arg_name = storage->GetString( |
| current_provider_->string_table[arg_name_ref]); |
| } |
| |
| if (arg_name == "process") { |
| pid = *current++; |
| } |
| } |
| |
| current = arg_base + arg_size; |
| } |
| |
| pid_table_[obj_id] = pid; |
| |
| UniqueTid utid = procs->UpdateThread(static_cast<uint32_t>(obj_id), |
| static_cast<uint32_t>(pid)); |
| storage->GetMutableThread(utid)->name_id = name; |
| break; |
| } |
| default: { |
| PERFETTO_DLOG("Skipping Kernel Object record with type %d", obj_type); |
| break; |
| } |
| } |
| break; |
| } |
| case kContextSwitch: { |
| // Context switch records come in order, so they do not need to go through |
| // TraceSorter. |
| uint32_t cpu = fuchsia_trace_utils::ReadField<uint32_t>(header, 16, 23); |
| uint32_t outgoing_state = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 24, 27); |
| uint32_t outgoing_thread_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 28, 35); |
| uint32_t incoming_thread_ref = |
| fuchsia_trace_utils::ReadField<uint32_t>(header, 36, 43); |
| int32_t outgoing_priority = |
| fuchsia_trace_utils::ReadField<int32_t>(header, 44, 51); |
| |
| uint64_t ticks = record[1]; |
| int64_t ts = fuchsia_trace_utils::TicksToNs( |
| ticks, current_provider_->ticks_per_second); |
| |
| const uint64_t* current = &record[2]; |
| |
| fuchsia_trace_utils::ThreadInfo outgoing_thread; |
| if (fuchsia_trace_utils::IsInlineThread(outgoing_thread_ref)) { |
| outgoing_thread = fuchsia_trace_utils::ReadInlineThread(¤t); |
| } else { |
| outgoing_thread = current_provider_->thread_table[outgoing_thread_ref]; |
| } |
| |
| fuchsia_trace_utils::ThreadInfo incoming_thread; |
| if (fuchsia_trace_utils::IsInlineThread(incoming_thread_ref)) { |
| incoming_thread = fuchsia_trace_utils::ReadInlineThread(¤t); |
| } else { |
| incoming_thread = current_provider_->thread_table[incoming_thread_ref]; |
| } |
| |
| // A thread with priority 0 represents an idle CPU |
| if (cpu_threads_.count(cpu) != 0 && outgoing_priority != 0) { |
| // TODO(bhamrick): Some early events will fail to associate with their |
| // pid because the kernel object info event hasn't been processed yet. |
| if (pid_table_.count(outgoing_thread.tid) > 0) { |
| outgoing_thread.pid = pid_table_[outgoing_thread.tid]; |
| } |
| |
| UniqueTid utid = |
| procs->UpdateThread(static_cast<uint32_t>(outgoing_thread.tid), |
| static_cast<uint32_t>(outgoing_thread.pid)); |
| RunningThread previous_thread = cpu_threads_[cpu]; |
| |
| ftrace_utils::TaskState end_state; |
| switch (outgoing_state) { |
| case kThreadNew: |
| case kThreadRunning: { |
| end_state = |
| ftrace_utils::TaskState(ftrace_utils::TaskState::kRunnable); |
| break; |
| } |
| case kThreadBlocked: { |
| end_state = ftrace_utils::TaskState( |
| ftrace_utils::TaskState::kInterruptibleSleep); |
| break; |
| } |
| case kThreadSuspended: { |
| end_state = |
| ftrace_utils::TaskState(ftrace_utils::TaskState::kStopped); |
| break; |
| } |
| case kThreadDying: { |
| end_state = |
| ftrace_utils::TaskState(ftrace_utils::TaskState::kExitZombie); |
| break; |
| } |
| case kThreadDead: { |
| end_state = |
| ftrace_utils::TaskState(ftrace_utils::TaskState::kExitDead); |
| break; |
| } |
| default: { break; } |
| } |
| |
| storage->mutable_slices()->AddSlice(cpu, previous_thread.start_ts, |
| ts - previous_thread.start_ts, utid, |
| end_state, outgoing_priority); |
| } |
| |
| RunningThread new_running; |
| new_running.info = incoming_thread; |
| new_running.start_ts = ts; |
| cpu_threads_[cpu] = new_running; |
| break; |
| } |
| default: { |
| PERFETTO_DLOG("Skipping record of unknown type %d", record_type); |
| break; |
| } |
| } |
| } |
| |
| void FuchsiaTraceTokenizer::RegisterProvider(uint32_t provider_id, |
| std::string name) { |
| std::unique_ptr<ProviderInfo> provider(new ProviderInfo()); |
| provider->name = name; |
| current_provider_ = provider.get(); |
| providers_[provider_id] = std::move(provider); |
| } |
| |
| } // namespace trace_processor |
| } // namespace perfetto |
