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/*
* Copyright (C) 2017 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 LOG_TAG "incident_helper"
#include <android/util/ProtoOutputStream.h>
#include "frameworks/base/core/proto/android/os/cpuinfo.proto.h"
#include "ih_util.h"
#include "CpuInfoParser.h"
using namespace android::os;
static void writeSuffixLine(ProtoOutputStream* proto, uint64_t fieldId,
const string& line, const string& delimiter,
const int count, const char* names[], const uint64_t ids[])
{
record_t record = parseRecord(line, delimiter);
uint64_t token = proto->start(fieldId);
for (int i=0; i<(int)record.size(); i++) {
for (int j=0; j<count; j++) {
if (stripSuffix(&record[i], names[j], true)) {
proto->write(ids[j], toInt(record[i]));
break;
}
}
}
proto->end(token);
}
status_t
CpuInfoParser::Parse(const int in, const int out) const
{
Reader reader(in);
string line;
header_t header;
vector<int> columnIndices; // task table can't be split by purely delimiter, needs column positions.
record_t record;
int nline = 0;
int diff = 0;
bool nextToSwap = false;
bool nextToUsage = false;
ProtoOutputStream proto;
Table table(CpuInfoProto::Task::_FIELD_NAMES, CpuInfoProto::Task::_FIELD_IDS, CpuInfoProto::Task::_FIELD_COUNT);
table.addEnumTypeMap("s", CpuInfoProto::Task::_ENUM_STATUS_NAMES,
CpuInfoProto::Task::_ENUM_STATUS_VALUES, CpuInfoProto::Task::_ENUM_STATUS_COUNT);
table.addEnumTypeMap("pcy", CpuInfoProto::Task::_ENUM_POLICY_NAMES,
CpuInfoProto::Task::_ENUM_POLICY_VALUES, CpuInfoProto::Task::_ENUM_POLICY_COUNT);
// parse line by line
while (reader.readLine(&line)) {
if (line.empty()) continue;
nline++;
// The format changes from time to time in toybox/toys/posix/ps.c
// With -H, it prints Threads instead of Tasks (FLAG(H)?"Thread":"Task")
if (stripPrefix(&line, "Threads:")) {
writeSuffixLine(&proto, CpuInfoProto::TASK_STATS, line, COMMA_DELIMITER,
CpuInfoProto::TaskStats::_FIELD_COUNT,
CpuInfoProto::TaskStats::_FIELD_NAMES,
CpuInfoProto::TaskStats::_FIELD_IDS);
continue;
}
if (stripPrefix(&line, "Mem:")) {
writeSuffixLine(&proto, CpuInfoProto::MEM, line, COMMA_DELIMITER,
CpuInfoProto::MemStats::_FIELD_COUNT,
CpuInfoProto::MemStats::_FIELD_NAMES,
CpuInfoProto::MemStats::_FIELD_IDS);
continue;
}
if (stripPrefix(&line, "Swap:")) {
writeSuffixLine(&proto, CpuInfoProto::SWAP, line, COMMA_DELIMITER,
CpuInfoProto::MemStats::_FIELD_COUNT,
CpuInfoProto::MemStats::_FIELD_NAMES,
CpuInfoProto::MemStats::_FIELD_IDS);
nextToSwap = true;
continue;
}
if (nextToSwap) {
writeSuffixLine(&proto, CpuInfoProto::CPU_USAGE, line, DEFAULT_WHITESPACE,
CpuInfoProto::CpuUsage::_FIELD_COUNT,
CpuInfoProto::CpuUsage::_FIELD_NAMES,
CpuInfoProto::CpuUsage::_FIELD_IDS);
nextToUsage = true;
nextToSwap = false;
continue;
}
// Header of tasks must be next to usage line
if (nextToUsage) {
// How to parse Header of Tasks:
// PID TID USER PR NI[%CPU]S VIRT RES PCY CMD NAME
// After parsing, header = { PID, TID, USER, PR, NI, CPU, S, VIRT, RES, PCY, CMD, NAME }
// And columnIndices will contain end index of each word.
header = parseHeader(line, "[ %]");
nextToUsage = false;
// NAME is not in the list since we need to modify the end of the CMD index.
const char* headerNames[] = { "PID", "TID", "USER", "PR", "NI", "CPU", "S", "VIRT", "RES", "PCY", "CMD", nullptr };
if (!getColumnIndices(columnIndices, headerNames, line)) {
return -1;
}
// Need to remove the end index of CMD and use the start index of NAME because CMD values contain spaces.
// for example: ... CMD NAME
// ... Jit thread pool com.google.android.gms.feedback
// If use end index of CMD, parsed result = { "Jit", "thread pool com.google.android.gms.feedback" }
// If use start index of NAME, parsed result = { "Jit thread pool", "com.google.android.gms.feedback" }
int endCMD = columnIndices.back();
columnIndices.pop_back();
columnIndices.push_back(line.find("NAME", endCMD) - 1);
// Add NAME index to complete the column list.
columnIndices.push_back(columnIndices.back() + 4);
continue;
}
record = parseRecordByColumns(line, columnIndices);
diff = record.size() - header.size();
if (diff < 0) {
fprintf(stderr, "[%s]Line %d has %d missing fields\n%s\n", this->name.string(), nline, -diff, line.c_str());
printRecord(record);
continue;
} else if (diff > 0) {
fprintf(stderr, "[%s]Line %d has %d extra fields\n%s\n", this->name.string(), nline, diff, line.c_str());
printRecord(record);
continue;
}
uint64_t token = proto.start(CpuInfoProto::TASKS);
for (int i=0; i<(int)record.size(); i++) {
if (!table.insertField(&proto, header[i], record[i])) {
fprintf(stderr, "[%s]Line %d fails to insert field %s with value %s\n",
this->name.string(), nline, header[i].c_str(), record[i].c_str());
}
}
proto.end(token);
}
if (!reader.ok(&line)) {
fprintf(stderr, "Bad read from fd %d: %s\n", in, line.c_str());
return -1;
}
if (!proto.flush(out)) {
fprintf(stderr, "[%s]Error writing proto back\n", this->name.string());
return -1;
}
fprintf(stderr, "[%s]Proto size: %zu bytes\n", this->name.string(), proto.size());
return NO_ERROR;
}
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