跟着小白一起学鸿蒙—DFX工具HiDumper 通过此工具可以查询系统信息

2024-06-30 18:09:55 [百科] 来源：避面尹邢网

跟着小白一起学鸿蒙—DFX工具HiDumper

作者：左翼风发 2023-04-04 09:24:11系统 OpenHarmony 本章我们讲了Hidumper，跟着X工作为开发者的小白查询工具，通过此工具可以查询系统信息，起学服务信息，鸿蒙进程栈等信息。跟着X工

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跟着小白一起学鸿蒙—DFX工具HiDumper 通过此工具可以查询系统信息

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跟着小白一起学鸿蒙—DFX工具HiDumper 通过此工具可以查询系统信息

HiDumper

简介

HiDumper是起学OpenHarmony中为开发、测试人员，鸿蒙IDE工具提供统一的跟着X工系统信息获取工具，帮助使用者分析，小白定位问题。起学

HiDumper主要包括以下几个主要模块：

hidumper：可执行程序，鸿蒙工具入口，跟着X工在板上可通过hidumper执行对应命令。小白
hidumperclient：动态库，起学提供framework层接口。
lib_dump_usage：动态库，提供framework层功能实现。
hidumperservice：动态库，sa服务，提供service层功能实现。

结构分析

.
├── BUILD.gn
├── bundle.json
├── client
│   └── native
│       ├── dump_client_main.cpp  
│       └── main.cpp        //可执行文件入口
├── figures
├── frameworks            //框架实现
│   └── native
│       ├── BUILD.gn
│       ├── common.h
│       ├── dump_controller.h
│       ├── dump_utils.cpp
│       ├── dump_utils.h
│       ├── include
│       └── src
├── hidumper.gni
├── interfaces
│   ├── innerkits
│   │   ├── BUILD.gn
│   │   ├── dump_usage.cpp
│   │   └── include
│   └── native
│       └── innerkits
├── LICENSE
├── OAT.xml
├── README.md
├── README_zh.md
├── sa_profile
├── services            //服务实现
│   ├── BUILD.gn
│   ├── hidumper.map
│   ├── native
│   │   ├── etc
│   │   ├── include
│   │   └── src
│   └── zidl
│       ├── include
│       └── src
├── test
└── utils

usage

"usage:\n"
"  -h                          |help text for the tool\n"
"  -lc                         |a list of system information clusters\n"
"  -ls                         |a list of system abilities\n"
"  -c                          |all system information clusters\n"
"  -c [base system]            |system information clusters labeled \"base\" and \"system\"\n"
"  -s                          |all system abilities\n"
"  -s [SA0 SA1]                |system abilities labeled \"SA0\" and \"SA1\"\n"
"  -s [SA] -a ['-h']           |system ability labeled \"SA\" with arguments \"-h\" specified\n"
"  -e                          |faultlogs of crash history\n"
"  --net                       |dump network information\n"
"  --storage                   |dump storage information\n"
"  -p                          |processes information, include list and infromation of processes"
" and threads\n"
"  -p [pid]                    |dump threads under pid, includes smap, block channel,"
" execute time, mountinfo\n"
"  --cpuusage [pid]            |dump cpu usage by processes and category; if PID is specified,"
" dump category usage of specified pid\n"
"  --cpufreq                   |dump real CPU frequency of each core\n"
"  --mem [pid]                 |dump memory usage of total; dump memory usage of specified"
" pid if pid was specified\n"
"  --zip                       |compress output to /data/log/hidumper\n";

如上，我们可以看出hidumper能查看几乎OpenHarmony里内的所有信息，比如：

查看系统ability信息，其中也包括HiDumperService

# hidumper -ls
System ability list:
RenderService                    AbilityManagerService            DataObserverMgr
UriPermissionMgr                 AccountMgr                       BundleMgr
FormMgr                          ApplicationManagerService        Installd
AccessibilityManagerService      UserIdmService                   UserAuthService
AuthExecutorMgrService           PinAuthService                   FaceAuthService
WifiDevice                       WifiHotspot                      WifiP2p
WifiScan                         BluetoothHost                    NetConnManager
NetPolicyManager                 NetStatsManager                  NetTetheringManager
EthernetManager                  NetsysNative                     HiviewService
HiviewFaultLogger                HiviewSysEventService            HiDumperService
DistributedKvData                DistributedSched                 EnterpriseDeviceManagerService
ResourceSched                    BackgroundTaskManager            WorkSchedule
SocPerfService                   DeviceUsageStatistics            MemoryManagerService
LocationGeoConvert               LocationLocator                  LocationGnss
LocationNetworkLocating          LocationNopowerLocating          DeviceStatusService
AudioDistributed                 PlayerDistributedService         CameraService
AudioPolicyService               AVSessionService                 MultimodalInput
DistributedNotificationService   CommonEventService               PowerManagerService
BatteryService                   ThermalService                   BatteryStatisticsService
DisplayPowerManagerService       AccessTokenManagerService        PrivacyManagerService
KeystoreService                  CertManagerService               SensorService
MiscDeviceService                PasteboardService                TimeService
InputMethodService               ScreenlockService                WallpaperManagerService
ParamWatcher                     SysParamDevice                   TelephonyCellularCall
TelephonyCellularData            TelephonySmsMms                  TelephonyStateRegistry
TelephonyCoreService             UsbService                       WindowManagerService
DisplayManagerService            DSoftbus                         DeviceAuthService
DeviceManagerService             StorageDaemon                    StorageManager
HdfDeviceServiceManager          DistributedFileDaemon            devattest_service
DistributedDeviceProfile         UiService

查看系统ability信息，其中也包括HiDumperService

-------------------------------[ability]-------------------------------
----------------------------------RenderService---------------------------------
------Graphic2D--RenderSerice ------
Usage:
h                             |help text for the tool
screen                         |dump all screen infomation in the system
surface                        |dump all surface information
composer fps                   |dump the fps info of composer
[surface name] fps             |dump the fps info of surface
composer fpsClear                   |clear the fps info of composer
[surface name] fpsClear             |clear the fps info of surface
nodeNotOnTree                  |dump nodeNotOnTree info
allSurfacesMem                 |dump surface mem info
RSTree                         |dump RSTree info
EventParamList                 |dump EventParamList info
allInfo                        |dump all info
...后面有好多

查看系统网络信息

#hidumper --net
-------------------------------[net]-------------------------------
cmd is: netstat -nW
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address                                       Foreign Address                                     State      
udp        0      0 127.0.0.1:44451                                     127.0.0.1:9877                                      ESTABLISHED
udp        0      0 127.0.0.1:37649                                     127.0.0.1:9877                                      ESTABLISHED
Active UNIX domain sockets (w/o servers)
Proto RefCnt Flags   Type      State      I-Node Path
unix  2      [ ]         DGRAM                        1675 /dev/unix/socket/fd_holder
unix  74     [ ]         DGRAM                         344 /dev/unix/socket/hilogInput
unix  2      [ ]         DGRAM                        1719 /dev/unix/socket/hisysevent
unix  2      [ ]         SEQPACKET                   24844 /dev/unix/socket/hdcd
...后面还有好多

查看系统进程信息

#hidumper -p
-------------------------------[processes]-------------------------------
cmd is: ps -efT
UID            PID   TID  PPID TCNT STIME TTY          TIME CMD
root             1     1     0    1 15:55:05 ?     00:00:03 init --second-stage
root             2     2     0    1 15:55:05 ?     00:00:00 [kthreadd]
root             3     3     2    1 15:55:05 ?     00:00:00 [rcu_gp]
root             4     4     2    1 15:55:05 ?     00:00:00 [rcu_par_gp]
root             8     8     2    1 15:55:05 ?     00:00:00 [mm_percpu_wq]
root             9     9     2    1 15:55:05 ?     00:00:00 [rcu_tasks_rude_]
...后面还有好多

查看系统内存信息

#hidumper --mem
-------------------------------[memory]-------------------------------
Total Memory Usage by PID:
PID  Name                Total Pss(xxx in SwapPss)   Total Vss   Total Rss   Total Uss          GL       Graph
1      init               1217(0 in SwapPss) kB     4612 kB     3600 kB      828 kB        0 kB        0 kB
241    watchdog_servic    260(0 in SwapPss) kB     3160 kB     2320 kB      232 kB        0 kB        0 kB
253    hilogd             2414(0 in SwapPss) kB     5968 kB     4576 kB     2252 kB        0 kB        0 kB
254    hdf_devmgr         600(0 in SwapPss) kB     6440 kB     3320 kB      496 kB        0 kB        0 kB
255    hiview             4780(0 in SwapPss) kB    79168 kB    14752 kB     3148 kB        0 kB        0 kB
256    storage_daemon     1539(0 in SwapPss) kB    11404 kB     7024 kB      932 kB        0 kB        0 kB
...后面有好多

查看系统错误

#hidumper -e
-------------------------------[faultlog]-------------------------------
/data/log/faultlog/faultlogger/jscrash-ohos.samples.videoplayer-20010040-20230328160126
Generated by HiviewDFX@OpenHarmony
================================================================
Device info:OpenHarmony 3.2
Build info:OpenHarmony 3.2.11.2
Module name:ohos.samples.videoplayer
Version:1.0.0
Pid:1763
Uid:20010040
Lifetime: 0.000000s
Js-Engine: ark
page: pages/Player.js
Error message: assertion (false) failed: type mismatch
Stacktrace:
at clearVideoPlayer (/ets/pages/Player.ets:213:7)
at onPageHide (/ets/pages/Player.ets:200:5)
...后面还有好多

从上面列举的一些命令可以看出hidumper是个集成入口，有些用了Linux下的常规命令，如ps，netstat，有些用OH内特制的内容，如systemability，faultlog。

基本原理

hidumper同OHOS里的其他服务一样都提供framework和service架构，通过IPC方式通过hidumperservice服务执行具体命令。
功能定义：
在下面的问题提供三部分内容：

base/hiviewdfx/hidumper/frameworks/native/src/util/config_data.cpp
1. 功能定义
const std::string ConfigData::CONFIG_NAME_SPLIT = "_";
const std::string ConfigData::CONFIG_GROUP = "group";
...
const std::string ConfigData::CONFIG_DUMPER_LIST_SYSTEM_ABILITY = ConfigData::CONFIG_DUMPER_LIST_ + "system_ability";
...
const std::string ConfigData::STR_ABILITY = "ability";
const std::string ConfigData::STR_BASE = "base";
const std::string ConfigData::STR_SERVICE = "service";
const std::string ConfigData::STR_SYSTEM = "system";

2. dumper方法
const ConfigData::ItemCfg ConfigData::baseInfoDumper_[] = { 
{ 
.name_ = "dumper_base_info",
.desc_ = "Base Information",
.target_ = "",
.section_ = "",
.class_ = DumperConstant::API_DUMPER,
.level_ = DumperConstant::NONE,
.loop_ = DumperConstant::NONE,
.filterCfg_ = "",
},
{ 
.name_ = "",
.desc_ = "",
.target_ = "",
.section_ = "",
.class_ = DumperConstant::FD_OUTPUT,
.level_ = DumperConstant::NONE,
.loop_ = DumperConstant::NONE,
.filterCfg_ = "",
},
};

3. 功能组定义
...
const std::string ConfigData::testGroup_[] = { 
"dumper_test",
};

const ConfigData::GroupCfg ConfigData::groups_[] = { 
{ 
.name_ = ConfigData::CONFIG_GROUP_CPU_FREQ,
.desc_ = "group of cpu freq dumper",
.list_ = cpuFreqGroup_,
.size_ = ARRAY_SIZE(cpuFreqGroup_),
.type_ = DumperConstant::GROUPTYPE_CPUID,
.expand_ = true,
},
...

简单调用流程：

graph LR
main --> DumpManagerClient --> DumpManagerService --> DumpImplement

功能实现流程：

graph LR
CmdParse --> GetDumperConfigs --> GetExecutorConfigList --> setExecutorList --> SetProgressEnabled --> DumpDatas

CmdParse: 解析命令。
GetDumperConfigs: 获取配置。
GetExecutorConfigList: 根据配置获取执行命令。
setExecutorList: 生成执行命令列表，通过ptrExecutorFactoryMap_获得对应executor。
SetProgressEnabled: 设置执行开关。
DumpDatas: 执行命令，获取输出信息。

executor实现：

//命令调用
popen 对应 dumper里.class_ = DumperConstant::CMD_DUMPER,

//文件读取
fdopen 对应 dumper里 .class_ = DumperConstant::FILE_DUMPER,

//api接口读取
提供对应的API调用，如GetDisplayVersion， 对应 dumper里 .class_ = DumperConstant::API_DUMPER,