| /* |
| * Copyright (C) 2008 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 "bootchart.h" |
| #include "log.h" |
| #include "property_service.h" |
| |
| #include <dirent.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/utsname.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include <android-base/file.h> |
| #include <android-base/stringprintf.h> |
| |
| using android::base::StringPrintf; |
| |
| static constexpr const char* LOG_STAT = "/data/bootchart/proc_stat.log"; |
| static constexpr const char* LOG_PROC = "/data/bootchart/proc_ps.log"; |
| static constexpr const char* LOG_DISK = "/data/bootchart/proc_diskstats.log"; |
| static constexpr const char* LOG_HEADER = "/data/bootchart/header"; |
| |
| // Polling period in ms. |
| static constexpr int BOOTCHART_POLLING_MS = 200; |
| |
| static long long g_last_bootchart_time; |
| |
| static bool g_bootcharting = false; |
| |
| static FILE* g_stat_log; |
| static FILE* g_proc_log; |
| static FILE* g_disk_log; |
| |
| static long long get_uptime_jiffies() { |
| std::string uptime; |
| if (!android::base::ReadFileToString("/proc/uptime", &uptime)) { |
| return 0; |
| } |
| return 100LL * strtod(uptime.c_str(), NULL); |
| } |
| |
| static void log_header() { |
| char date[32]; |
| time_t now_t = time(NULL); |
| struct tm now = *localtime(&now_t); |
| strftime(date, sizeof(date), "%F %T", &now); |
| |
| utsname uts; |
| if (uname(&uts) == -1) { |
| return; |
| } |
| |
| std::string fingerprint = property_get("ro.build.fingerprint"); |
| if (fingerprint.empty()) { |
| return; |
| } |
| |
| std::string kernel_cmdline; |
| android::base::ReadFileToString("/proc/cmdline", &kernel_cmdline); |
| |
| FILE* out = fopen(LOG_HEADER, "we"); |
| if (out == NULL) { |
| return; |
| } |
| fprintf(out, "version = Android init 0.8\n"); |
| fprintf(out, "title = Boot chart for Android (%s)\n", date); |
| fprintf(out, "system.uname = %s %s %s %s\n", uts.sysname, uts.release, uts.version, uts.machine); |
| fprintf(out, "system.release = %s\n", fingerprint.c_str()); |
| // TODO: use /proc/cpuinfo "model name" line for x86, "Processor" line for arm. |
| fprintf(out, "system.cpu = %s\n", uts.machine); |
| fprintf(out, "system.kernel.options = %s\n", kernel_cmdline.c_str()); |
| fclose(out); |
| } |
| |
| static void log_uptime(FILE* log) { |
| fprintf(log, "%lld\n", get_uptime_jiffies()); |
| } |
| |
| static void log_file(FILE* log, const char* procfile) { |
| log_uptime(log); |
| |
| std::string content; |
| if (android::base::ReadFileToString(procfile, &content)) { |
| fprintf(log, "%s\n", content.c_str()); |
| } |
| } |
| |
| static void log_processes() { |
| log_uptime(g_proc_log); |
| |
| std::unique_ptr<DIR, int(*)(DIR*)> dir(opendir("/proc"), closedir); |
| struct dirent* entry; |
| while ((entry = readdir(dir.get())) != NULL) { |
| // Only match numeric values. |
| int pid = atoi(entry->d_name); |
| if (pid == 0) continue; |
| |
| // /proc/<pid>/stat only has truncated task names, so get the full |
| // name from /proc/<pid>/cmdline. |
| std::string cmdline; |
| android::base::ReadFileToString(StringPrintf("/proc/%d/cmdline", pid), &cmdline); |
| const char* full_name = cmdline.c_str(); // So we stop at the first NUL. |
| |
| // Read process stat line. |
| std::string stat; |
| if (android::base::ReadFileToString(StringPrintf("/proc/%d/stat", pid), &stat)) { |
| if (!cmdline.empty()) { |
| // Substitute the process name with its real name. |
| size_t open = stat.find('('); |
| size_t close = stat.find_last_of(')'); |
| if (open != std::string::npos && close != std::string::npos) { |
| stat.replace(open + 1, close - open - 1, full_name); |
| } |
| } |
| fputs(stat.c_str(), g_proc_log); |
| } |
| } |
| |
| fputc('\n', g_proc_log); |
| } |
| |
| static int do_bootchart_start() { |
| // We don't care about the content, but we do care that /data/bootchart/enabled actually exists. |
| std::string start; |
| if (!android::base::ReadFileToString("/data/bootchart/enabled", &start)) { |
| LOG(VERBOSE) << "Not bootcharting"; |
| return 0; |
| } |
| |
| // Open log files. |
| std::unique_ptr<FILE, decltype(&fclose)> stat_log(fopen(LOG_STAT, "we"), fclose); |
| if (!stat_log) { |
| PLOG(ERROR) << "Bootcharting couldn't open " << LOG_STAT; |
| return -1; |
| } |
| std::unique_ptr<FILE, decltype(&fclose)> proc_log(fopen(LOG_PROC, "we"), fclose); |
| if (!proc_log) { |
| PLOG(ERROR) << "Bootcharting couldn't open " << LOG_PROC; |
| return -1; |
| } |
| std::unique_ptr<FILE, decltype(&fclose)> disk_log(fopen(LOG_DISK, "we"), fclose); |
| if (!disk_log) { |
| PLOG(ERROR) << "Bootcharting couldn't open " << LOG_DISK; |
| return -1; |
| } |
| |
| LOG(INFO) << "Bootcharting started"; |
| g_stat_log = stat_log.release(); |
| g_proc_log = proc_log.release(); |
| g_disk_log = disk_log.release(); |
| g_bootcharting = true; |
| log_header(); |
| |
| return 0; |
| } |
| |
| static void do_bootchart_step() { |
| log_file(g_stat_log, "/proc/stat"); |
| log_file(g_disk_log, "/proc/diskstats"); |
| log_processes(); |
| } |
| |
| static int do_bootchart_stop() { |
| if (!g_bootcharting) return 0; |
| |
| LOG(INFO) << "Bootcharting finished"; |
| g_bootcharting = false; |
| fclose(g_stat_log); |
| fclose(g_disk_log); |
| fclose(g_proc_log); |
| return 0; |
| } |
| |
| int do_bootchart(const std::vector<std::string>& args) { |
| if (args[1] == "start") return do_bootchart_start(); |
| return do_bootchart_stop(); |
| } |
| |
| void bootchart_sample(int* timeout) { |
| // Do we have any more bootcharting to do? |
| if (!g_bootcharting) return; |
| |
| long long current_time = 10LL * get_uptime_jiffies(); |
| int elapsed_time = current_time - g_last_bootchart_time; |
| |
| if (elapsed_time >= BOOTCHART_POLLING_MS) { |
| while (elapsed_time >= BOOTCHART_POLLING_MS) { |
| elapsed_time -= BOOTCHART_POLLING_MS; |
| } |
| |
| g_last_bootchart_time = current_time; |
| do_bootchart_step(); |
| } |
| |
| // Schedule another? |
| if (g_bootcharting) { |
| int remaining_time = BOOTCHART_POLLING_MS - elapsed_time; |
| if (*timeout < 0 || *timeout > remaining_time) { |
| *timeout = remaining_time; |
| } |
| } |
| } |