| /* |
| * Copyright (C) 2015 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 "event_attr.h" |
| |
| #include <inttypes.h> |
| #include <stdio.h> |
| #include <string> |
| #include <unordered_map> |
| |
| #include <base/logging.h> |
| |
| #include "event_type.h" |
| #include "utils.h" |
| |
| static std::string BitsToString(const std::string& name, uint64_t bits, |
| const std::vector<std::pair<int, std::string>>& bit_names) { |
| std::string result; |
| for (auto& p : bit_names) { |
| if (bits & p.first) { |
| bits &= ~p.first; |
| if (!result.empty()) { |
| result += ", "; |
| } |
| result += p.second; |
| } |
| } |
| if (bits != 0) { |
| LOG(DEBUG) << "unknown " << name << " bits: " << std::hex << bits; |
| } |
| return result; |
| } |
| |
| static std::string SampleTypeToString(uint64_t sample_type) { |
| static std::vector<std::pair<int, std::string>> sample_type_names = { |
| {PERF_SAMPLE_ADDR, "addr"}, |
| {PERF_SAMPLE_CALLCHAIN, "callchain"}, |
| {PERF_SAMPLE_CPU, "cpu"}, |
| {PERF_SAMPLE_ID, "id"}, |
| {PERF_SAMPLE_IP, "ip"}, |
| {PERF_SAMPLE_PERIOD, "period"}, |
| {PERF_SAMPLE_RAW, "raw"}, |
| {PERF_SAMPLE_READ, "read"}, |
| {PERF_SAMPLE_STREAM_ID, "stream_id"}, |
| {PERF_SAMPLE_TID, "tid"}, |
| {PERF_SAMPLE_TIME, "time"}, |
| }; |
| return BitsToString("sample_type", sample_type, sample_type_names); |
| } |
| |
| static std::string ReadFormatToString(uint64_t read_format) { |
| static std::vector<std::pair<int, std::string>> read_format_names = { |
| {PERF_FORMAT_TOTAL_TIME_ENABLED, "total_time_enabled"}, |
| {PERF_FORMAT_TOTAL_TIME_RUNNING, "total_time_running"}, |
| {PERF_FORMAT_ID, "id"}, |
| {PERF_FORMAT_GROUP, "group"}, |
| }; |
| return BitsToString("read_format", read_format, read_format_names); |
| } |
| |
| perf_event_attr CreateDefaultPerfEventAttr(const EventType& event_type) { |
| perf_event_attr attr; |
| memset(&attr, 0, sizeof(attr)); |
| attr.size = sizeof(perf_event_attr); |
| attr.type = event_type.type; |
| attr.config = event_type.config; |
| attr.mmap = 1; |
| attr.comm = 1; |
| attr.disabled = 1; |
| // Changing read_format affects the layout of the data read from perf_event_file, namely |
| // PerfCounter in event_fd.h. |
| attr.read_format = |
| PERF_FORMAT_TOTAL_TIME_ENABLED | PERF_FORMAT_TOTAL_TIME_RUNNING | PERF_FORMAT_ID; |
| attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | PERF_SAMPLE_PERIOD; |
| |
| if (attr.type == PERF_TYPE_TRACEPOINT) { |
| attr.sample_freq = 0; |
| attr.sample_period = 1; |
| } |
| return attr; |
| } |
| |
| void DumpPerfEventAttr(const perf_event_attr& attr, size_t indent) { |
| std::string event_name = "unknown"; |
| const EventType* event_type = EventTypeFactory::FindEventTypeByConfig(attr.type, attr.config); |
| if (event_type != nullptr) { |
| event_name = event_type->name; |
| } |
| |
| PrintIndented(indent, "event_attr: for event type %s\n", event_name.c_str()); |
| |
| PrintIndented(indent + 1, "type %u, size %u, config %llu\n", attr.type, attr.size, attr.config); |
| |
| if (attr.freq != 0) { |
| PrintIndented(indent + 1, "sample_freq %llu\n", attr.sample_freq); |
| } else { |
| PrintIndented(indent + 1, "sample_period %llu\n", attr.sample_period); |
| } |
| |
| PrintIndented(indent + 1, "sample_type (0x%llx) %s\n", attr.sample_type, |
| SampleTypeToString(attr.sample_type).c_str()); |
| |
| PrintIndented(indent + 1, "read_format (0x%llx) %s\n", attr.read_format, |
| ReadFormatToString(attr.read_format).c_str()); |
| |
| PrintIndented(indent + 1, "disabled %llu, inherit %llu, pinned %llu, exclusive %llu\n", |
| attr.disabled, attr.inherit, attr.pinned, attr.exclusive); |
| |
| PrintIndented(indent + 1, "exclude_user %llu, exclude_kernel %llu, exclude_hv %llu\n", |
| attr.exclude_user, attr.exclude_kernel, attr.exclude_hv); |
| |
| PrintIndented(indent + 1, "exclude_idle %llu, mmap %llu, comm %llu, freq %llu\n", |
| attr.exclude_idle, attr.mmap, attr.comm, attr.freq); |
| |
| PrintIndented(indent + 1, "inherit_stat %llu, enable_on_exec %llu, task %llu\n", |
| attr.inherit_stat, attr.enable_on_exec, attr.task); |
| |
| PrintIndented(indent + 1, "watermark %llu, precise_ip %llu, mmap_data %llu\n", attr.watermark, |
| attr.precise_ip, attr.mmap_data); |
| |
| PrintIndented(indent + 1, "sample_id_all %llu, exclude_host %llu, exclude_guest %llu\n", |
| attr.sample_id_all, attr.exclude_host, attr.exclude_guest); |
| } |