前段时间有位朋友问我，如何从 dump 中提取出哪些和机器相关的信息？比如：机器内存大小，cpu核数，机器名，机器的环境变量 等等。

那如何提取到里面的信息呢？当然我也没说全部可以提取的到。。。这里就拿自己的机器举例吧：

1. 如何提取 cpu 核数

windbg 中有一个 !cpuid 命令，可以提取出cpu的相关信息。

0:006> !cpuid
CP  F/M/S  Manufacturer     MHz0  6,5,2  GenuineIntel    25921  6,5,2  GenuineIntel    25922  6,5,2  GenuineIntel    25923  6,5,2  GenuineIntel    25924  6,5,2  GenuineIntel    25925  6,5,2  GenuineIntel    25926  6,5,2  GenuineIntel    25927  6,5,2  GenuineIntel    25928  6,5,2  GenuineIntel    25929  6,5,2  GenuineIntel    2592
10  6,5,2  GenuineIntel    2592
11  6,5,2  GenuineIntel    2592

可以看出，当前cpu为12核，厂家为intel，兆赫=2592。

2. 如何提取机器名

windbg中有一个命令叫 !envvar ，可用于获取指定的环境变量,比如这里的 COMPUTERNAME 啦。

0:006> !envvar COMPUTERNAMECOMPUTERNAME = SD-20210607OIBM

3. 如何提取机器环境变量

从上面的 !envvar 用法中你应该能感触到，既然能提取环境变量，那能不能获取到所有的环境变量呢？当然可以了哈。用 !peb，也就是 Process Environment Block。

0:006> !peb
PEB at 002af000InheritedAddressSpace:    NoReadImageFileExecOptions: NoBeingDebugged:            YesImageBaseAddress:         00400000NtGlobalFlag:             4070NtGlobalFlag2:            0Ldr                       77975d80Ldr.Initialized:          YesLdr.InInitializationOrderModuleList: 006e4f68 . 0075e630Ldr.InLoadOrderModuleList:           006e5060 . 0075bae8Ldr.InMemoryOrderModuleList:         006e5068 . 0075baf0Base TimeStamp                     Module400000 D:\net5\ConsoleApp4\ConsoleApp1\bin\Debug\ConsoleApp1.exe77850000 5f641e44 Sep 18 10:41:08 2020 C:\Windows\SYSTEM32\ntdll.dll7c570000 C:\Windows\SYSTEM32\MSCOREE.DLL75ac0000 C:\Windows\System32\KERNEL32.dll76900000 197b16c5 Jul 20 05:12:37 1983 C:\Windows\System32\KERNELBASE.dll76880000 C:\Windows\System32\ADVAPI32.dll75740000 7f567a50 Sep 12 21:10:40 2037 C:\Windows\System32\msvcrt.dll76170000 56a91365 Jan 28 02:58:45 2016 C:\Windows\System32\sechost.dll76c20000 C:\Windows\System32\RPCRT4.dll7c5d0000 5e7d1df2 Mar 27 05:26:10 2020 C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscoreei.dll758a0000 C:\Windows\System32\SHLWAPI.dll76490000 3d49eb55 Aug 02 10:15:49 2002 C:\Windows\System32\kernel.appcore.dll74b60000 C:\Windows\SYSTEM32\VERSION.dll79a40000 5f7e61bb Oct 08 08:47:55 2020 C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll76650000 1e757656 Mar 12 20:28:06 1986 C:\Windows\System32\USER32.dll764d0000 55cf9768 Aug 16 03:47:52 2015 C:\Windows\System32\win32u.dll75480000 1baae673 Sep 16 20:15:47 1984 C:\Windows\System32\GDI32.dll764f0000 C:\Windows\System32\gdi32full.dll7a210000 5bac17e1 Sep 27 07:36:01 2018 C:\Windows\SYSTEM32\ucrtbase_clr0400.dll7a1f0000 5bac17e5 Sep 27 07:36:05 2018 C:\Windows\SYSTEM32\VCRUNTIME140_CLR0400.dll75810000 C:\Windows\System32\msvcp_win.dll77500000 73123758 Mar 06 22:27:36 2031 C:\Windows\System32\ucrtbase.dll764a0000 39046a45 Apr 24 23:37:41 2000 C:\Windows\System32\IMM32.DLL7a2c0000 5f7e60f6 Oct 08 08:44:38 2020 C:\Windows\assembly\NativeImages_v4.0.30319_32\mscorlib\218db16dceaef380c6daf35c6a48f313\mscorlib.ni.dll762a0000 4f8dda94 Apr 18 05:03:16 2012 C:\Windows\System32\ole32.dll754b0000 2f680839 Mar 16 17:43:21 1995 C:\Windows\System32\combase.dll76b80000 C:\Windows\System32\bcryptPrimitives.dll7b6d0000 5f7e60c1 Oct 08 08:43:45 2020 C:\Windows\Microsoft.NET\Framework\v4.0.30319\clrjit.dll77750000 C:\Windows\System32\OLEAUT32.dllSubSystemData:     00000000ProcessHeap:       006e0000ProcessParameters: 006e29b8CurrentDirectory:  'C:\Windows\system32\'WindowTitle:  'D:\net5\ConsoleApp4\ConsoleApp1\bin\Debug\ConsoleApp1.exe'ImageFile:    'D:\net5\ConsoleApp4\ConsoleApp1\bin\Debug\ConsoleApp1.exe'CommandLine:  'D:\net5\ConsoleApp4\ConsoleApp1\bin\Debug\ConsoleApp1.exe'DllPath:      '< Name not readable >'Environment:  006e0b80=::=::\ALLUSERSPROFILE=C:\ProgramDataAPPDATA=C:\Users\Administrator\AppData\RoamingASPNETCORE_ENVIRONMENT=DevelopmentCLASSPATH=.;C:\Program Files\Java\jdk1.8.0_121\lib\dt.jar;C:\Program Files\Java\jdk1.8.0_121\lib\tools.jar;CommonProgramFiles=C:\Program Files (x86)\Common FilesCommonProgramFiles(x86)=C:\Program Files (x86)\Common FilesCommonProgramW6432=C:\Program Files\Common FilesCOMPUTERNAME=SD-20210607OIBMComSpec=C:\Windows\system32\cmd.exeDBGENG_OVERRIDE_DBGSRV_PATH=C:\Users\Administrator\AppData\Local\Microsoft\WindowsApps\Microsoft.WinDbg_8wekyb3d8bbwe\dbgsrv32.exeDBGHELP_HOMEDIR=C:\ProgramData\DbgDriverData=C:\Windows\System32\Drivers\DriverDataHOMEDRIVE=C:HOMEPATH=\Users\AdministratorJAVA_HOME=C:\Program Files\Java\jdk1.8.0_121LOCALAPPDATA=C:\Users\Administrator\AppData\LocalLOGONSERVER=\\SD-20210607OIBMMOZ_PLUGIN_PATH=C:\Program Files (x86)\Foxit Software\Foxit Reader\plugins\NUMBER_OF_PROCESSORS=12OneDrive=C:\Users\Administrator\OneDriveOS=Windows_NTPath=C:\Program Files\WindowsApps\Microsoft.WinDbg_1.2107.13001.0_neutral__8wekyb3d8bbwe\x86;C:\Program Files\WindowsApps\Microsoft.WinDbg_1.2107.13001.0_neutral__8wekyb3d8bbwe\amd64;C:\Program Files (x86)\VMware\VMware Workstation\bin\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files\Git\cmd;C:\soft\procdump;C:\Program Files\Java\jdk1.8.0_121\bin;C:\Program Files\Java\jdk1.8.0_121\jre\bin;C:\Program Files\nodejs\;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\Azure Data Studio\bin;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Visual Leak Detector\bin\Win32;C:\Program Files (x86)\Visual Leak Detector\bin\Win64;C:\Program Files\TortoiseGit\bin;C:\Program Files\Microsoft\Web Platform Installer\;C:\soft\nginx;C:\Program Files (x86)\dotnet\;C:\Program Files (x86)\NetSarang\Xshell 7\;C:\Users\Administrator\AppData\Local\Microsoft\WindowsApps;C:\Users\Administrator\.dotnet\tools;C:\Users\Administrator\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\Administrator\AppData\Roaming\npmPATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSCPROCESSOR_ARCHITECTURE=x86PROCESSOR_ARCHITEW6432=AMD64PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 165 Stepping 2, GenuineIntelPROCESSOR_LEVEL=6PROCESSOR_REVISION=a502ProgramData=C:\ProgramDataProgramFiles=C:\Program Files (x86)ProgramFiles(x86)=C:\Program Files (x86)ProgramW6432=C:\Program FilesPSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\PowerShell\Modules\PUBLIC=C:\Users\PublicSRCSRV_SHOW_TF_PROMPT=1SystemDrive=C:SystemRoot=C:\WindowsTEMP=C:\Users\ADMINI~1\AppData\Local\TempTMP=C:\Users\ADMINI~1\AppData\Local\TempUSERDOMAIN=SD-20210607OIBMUSERDOMAIN_ROAMINGPROFILE=SD-20210607OIBMUSERNAME=AdministratorUSERPROFILE=C:\Users\Administratorwindir=C:\WindowsWXDRIVE_START_ARGS=--wxdrive-setting=0 --disable-gpu --disable-software-rasterizer --enable-features=NetworkServiceInProcessZES_ENABLE_SYSMAN=1

哈哈，这信息是不是相当多。。。。

4. 其他信息

很遗憾的是，我目前还不知道从 dump 中提取出当前机器的内存大小，如果有知道的，可以聊一聊。