adb bugreport 原理-白红宇

adb bugreport 原理

阅读量：4147 次

发布时间：2019-05-25

本文共 10654 字，大约阅读时间需要 35 分钟。

0.文章学习

1.使用场景

使用 adb bugreport 可以导出功耗分析所需文件，然后通过进行更加详细的分析

adb bugreport > Bugreport.zipadb bugreport > Bugreport.txt

adb bugreport - return all information from the device that should be included in a bug report.

" bugreport [PATH]\n"    "     write bugreport to given PATH [default=bugreport.zip];\n"    "     if PATH is a directory, the bug report is saved in that directory.\n"    "     devices that don't support zipped bug reports output to stdout.\n"

这里主要想知道 bugreport 的数据从哪里导出

2. bugreport 数据来源

2.1 adb bugreport 命令下发的接收点

system/core/adb/commandline.cpp

命令行接收事件查看

#include "bugreport.h"int adb_commandline(int argc, const char** argv) {    ...    } else if (!strcmp(argv[0], "bugreport")) {    Bugreport bugreport;    return bugreport.DoIt(argc, argv);    ....

2.2 bugreport.DoIt(argc, argv)

system/core/adb/bugreport.cpp

int Bugreport::DoIt(int argc, const char** argv) {    ...    return SendShellCommand(bugz_command, false, &bugz_callback);}

2.3 命令下发执行文件

对应系统目录下的可执行文件

/system/bin # ls -al

-rwxr-xr-x  1 root   shell      10264 2018-05-31 15:18 bugreport-rwxr-xr-x  1 root   shell      10264 2018-05-31 15:18 bugreportz

frameworks\native\cmds\bugreport\bugreport.cpp

2.4 读取bugreport信息

其实bugreport就是 dumpstate，具体文件在手机系统目录 system/bin/dumpstate，dumpstate是可执行文件

cmd 窗口

Sufadi:/system/bin # ls dumpstate -allls dumpstate -all-rwxr-xr-x 1 root shell 207136 2018-05-31 15:18 dumpstate

具体源码

// This program will trigger the dumpstate service to start a call to// dumpstate, then connect to the dumpstate local client to read the// output. All of the dumpstate output is written to stdout, including// any errors encountered while reading/writing the output.int main() {  ...  // Start the dumpstate service. 启动 dumpstate service  // 其实bugreport就是 dumpstate   property_set("ctl.start", "dumpstate");  ...  while (1) {    ...    char buffer[65536];    ssize_t bytes_read = TEMP_FAILURE_RETRY(read(s, buffer, sizeof(buffer)));    do {      bytes_written = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,                                               buffer + bytes_read - bytes_to_send,                                               bytes_to_send));      if (bytes_written == -1) {        printf("Failed to write data to stdout: read %zd, trying to send %zd (%s)\n",               bytes_read, bytes_to_send, strerror(errno));        return 1;      }      bytes_to_send -= bytes_written;    } while (bytes_written != 0 && bytes_to_send > 0);  }  close(s);  return 0;}

2.5 dumpstate 的实现及其数据来源

frameworks\native\cmds\dumpstate\dumpstate.cpp

1.系统属性

2./proc和/sys节点文件

3.执行shell命令获得相关输出

4.logcat输出

5.Android Framework Services信息基本使用dumpsys命令通过binder调用服务中的dump函数获得信息

static void dumpstate() {    DurationReporter duration_reporter("DUMPSTATE");    dump_dev_files("TRUSTY VERSION", "/sys/bus/platform/drivers/trusty", "trusty_version");    RunCommand("UPTIME", {
  "uptime"});    DumpBlockStatFiles();    dump_emmc_ecsd("/d/mmc0/mmc0:0001/ext_csd");    DumpFile("MEMORY INFO", "/proc/meminfo");    RunCommand("CPU INFO", {
  "top", "-b", "-n", "1", "-H", "-s", "6", "-o",                            "pid,tid,user,pr,ni,%cpu,s,virt,res,pcy,cmd,name"});    RunCommand("PROCRANK", {
  "procrank"}, AS_ROOT_20);    DumpFile("VIRTUAL MEMORY STATS", "/proc/vmstat");    DumpFile("VMALLOC INFO", "/proc/vmallocinfo");    DumpFile("SLAB INFO", "/proc/slabinfo");    DumpFile("ZONEINFO", "/proc/zoneinfo");    DumpFile("PAGETYPEINFO", "/proc/pagetypeinfo");    DumpFile("BUDDYINFO", "/proc/buddyinfo");    DumpFile("FRAGMENTATION INFO", "/d/extfrag/unusable_index");    DumpFile("KERNEL WAKE SOURCES", "/d/wakeup_sources");    DumpFile("KERNEL CPUFREQ", "/sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state");    DumpFile("KERNEL SYNC", "/d/sync");    RunCommand("PROCESSES AND THREADS",               {
  "ps", "-A", "-T", "-Z", "-O", "pri,nice,rtprio,sched,pcy"});    RunCommand("LIBRANK", {
  "librank"}, CommandOptions::AS_ROOT);    if (ds.IsZipping()) {        RunCommand(                "HARDWARE HALS",                {
  "lshal", std::string("--debug=") + kLsHalDebugPath},                CommandOptions::AS_ROOT);        ds.AddZipEntry("lshal-debug.txt", kLsHalDebugPath);        unlink(kLsHalDebugPath.c_str());    } else {        RunCommand(                "HARDWARE HALS", {
  "lshal", "--debug"}, CommandOptions::AS_ROOT);    }    RunCommand("PRINTENV", {
  "printenv"});    RunCommand("NETSTAT", {
  "netstat", "-nW"});    struct stat s;    if (stat("/proc/modules", &s) != 0) {        MYLOGD("Skipping 'lsmod' because /proc/modules does not exist\n");    } else {        RunCommand("LSMOD", {
  "lsmod"});    }    do_dmesg();    RunCommand("LIST OF OPEN FILES", {
  "lsof"}, CommandOptions::AS_ROOT);    for_each_pid(do_showmap, "SMAPS OF ALL PROCESSES");    for_each_tid(show_wchan, "BLOCKED PROCESS WAIT-CHANNELS");    for_each_pid(show_showtime, "PROCESS TIMES (pid cmd user system iowait+percentage)");    /* Dump Bluetooth HCI logs */    ds.AddDir("/data/misc/bluetooth/logs", true);    if (!ds.do_early_screenshot_) {        MYLOGI("taking late screenshot\n");        ds.TakeScreenshot();    }    DoLogcat();    AddAnrTraceFiles();    // NOTE: tombstones are always added as separate entries in the zip archive    // and are not interspersed with the main report.    const bool tombstones_dumped = AddDumps(tombstone_data->begin(), tombstone_data->end(),                                            "TOMBSTONE", true /* add_to_zip */);    if (!tombstones_dumped) {        printf("*** NO TOMBSTONES to dump in %s\n\n", TOMBSTONE_DIR.c_str());    }    DumpPacketStats();    DoKmsg();    DumpIpAddrAndRules();    dump_route_tables();    RunCommand("ARP CACHE", {
  "ip", "-4", "neigh", "show"});    RunCommand("IPv6 ND CACHE", {
  "ip", "-6", "neigh", "show"});    RunCommand("MULTICAST ADDRESSES", {
  "ip", "maddr"});    RunDumpsys("NETWORK DIAGNOSTICS", {
  "connectivity", "--diag"},               CommandOptions::WithTimeout(10).Build());    RunCommand("SYSTEM PROPERTIES", {
  "getprop"});    RunCommand("VOLD DUMP", {
  "vdc", "dump"});    RunCommand("SECURE CONTAINERS", {
  "vdc", "asec", "list"});    RunCommand("STORAGED TASKIOINFO", {
  "storaged", "-u"}, CommandOptions::WithTimeout(10).Build());    RunCommand("FILESYSTEMS & FREE SPACE", {
  "df"});    RunCommand("LAST RADIO LOG", {
  "parse_radio_log", "/proc/last_radio_log"});    printf("------ BACKLIGHTS ------\n");    printf("LCD brightness=");    DumpFile("", "/sys/class/leds/lcd-backlight/brightness");    printf("Button brightness=");    DumpFile("", "/sys/class/leds/button-backlight/brightness");    printf("Keyboard brightness=");    DumpFile("", "/sys/class/leds/keyboard-backlight/brightness");    printf("ALS mode=");    DumpFile("", "/sys/class/leds/lcd-backlight/als");    printf("LCD driver registers:\n");    DumpFile("", "/sys/class/leds/lcd-backlight/registers");    printf("\n");    /* Binder state is expensive to look at as it uses a lot of memory. */    DumpFile("BINDER FAILED TRANSACTION LOG", "/sys/kernel/debug/binder/failed_transaction_log");    DumpFile("BINDER TRANSACTION LOG", "/sys/kernel/debug/binder/transaction_log");    DumpFile("BINDER TRANSACTIONS", "/sys/kernel/debug/binder/transactions");    DumpFile("BINDER STATS", "/sys/kernel/debug/binder/stats");    DumpFile("BINDER STATE", "/sys/kernel/debug/binder/state");    ds.DumpstateBoard();    /* Migrate the ril_dumpstate to a device specific dumpstate? */    int rilDumpstateTimeout = android::base::GetIntProperty("ril.dumpstate.timeout", 0);    if (rilDumpstateTimeout > 0) {        // su does not exist on user builds, so try running without it.        // This way any implementations of vril-dump that do not require        // root can run on user builds.        CommandOptions::CommandOptionsBuilder options =            CommandOptions::WithTimeout(rilDumpstateTimeout);        if (!PropertiesHelper::IsUserBuild()) {            options.AsRoot();        }        RunCommand("DUMP VENDOR RIL LOGS", {
  "vril-dump"}, options.Build());    }    printf("========================================================\n");    printf("== Android Framework Services\n");    printf("========================================================\n");    RunDumpsys("DUMPSYS", {
  "--skip", "meminfo", "cpuinfo"}, CommandOptions::WithTimeout(90).Build(),               10);    printf("========================================================\n");    printf("== Checkins\n");    printf("========================================================\n");    RunDumpsys("CHECKIN BATTERYSTATS", {
  "batterystats", "-c"});    RunDumpsys("CHECKIN MEMINFO", {
  "meminfo", "--checkin"});    RunDumpsys("CHECKIN NETSTATS", {
  "netstats", "--checkin"});    RunDumpsys("CHECKIN PROCSTATS", {
  "procstats", "-c"});    RunDumpsys("CHECKIN USAGESTATS", {
  "usagestats", "-c"});    RunDumpsys("CHECKIN PACKAGE", {
  "package", "--checkin"});    printf("========================================================\n");    printf("== Running Application Activities\n");    printf("========================================================\n");    RunDumpsys("APP ACTIVITIES", {
  "activity", "-v", "all"});    printf("========================================================\n");    printf("== Running Application Services\n");    printf("========================================================\n");    RunDumpsys("APP SERVICES", {
  "activity", "service", "all"});    printf("========================================================\n");    printf("== Running Application Providers\n");    printf("========================================================\n");    RunDumpsys("APP PROVIDERS", {
  "activity", "provider", "all"});    printf("========================================================\n");    printf("== Dropbox crashes\n");    printf("========================================================\n");    RunDumpsys("DROPBOX SYSTEM SERVER CRASHES", {
  "dropbox", "-p", "system_server_crash"});    RunDumpsys("DROPBOX SYSTEM APP CRASHES", {
  "dropbox", "-p", "system_app_crash"});    printf("========================================================\n");    printf("== Final progress (pid %d): %d/%d (estimated %d)\n", ds.pid_, ds.progress_->Get(),           ds.progress_->GetMax(), ds.progress_->GetInitialMax());    printf("========================================================\n");    printf("== dumpstate: done (id %d)\n", ds.id_);    printf("========================================================\n");}