Question

我在我的C＃应用程序中使用Firebird SQL 2.5.8的嵌入式版本（.NET 4.6.2，FirebirdSql.Data.FirebirdClient 5.8.0）

在Windows 8.1客户端上，如果我退出应用程序，则会出现以下错误：

Problemsignatur:
Problemereignisname:    APPCRASH
Anwendungsname: Fewo.exe
Anwendungsversion:  19.0.0.0
Anwendungszeitstempel:  5a79bf34
Fehlermodulname:    fbintl.DLL
Fehlermodulversion: 2.5.8.27089
Fehlermodulzeitstempel: 5a4f3dbc
Ausnahmecode:   c0000005
Ausnahmeoffset: 00004e9c
Betriebsystemversion:   6.3.9600.2.0.0.256.48
Gebietsschema-ID:   1031
Zusatzinformation 1:    5861
Zusatzinformation 2:    5861822e1919d7c014bbb064c64908b2
Zusatzinformation 3:    a10f
Zusatzinformation 4:    a10ff7d2bb2516fdc753f9c34fc3b069

我创建了一个转储文件，并根据.NET console app with Firebird Client crashes on program end对其进行了分析。这是输出：

0:000> !analyze -v
*******************************************************************************
*                                                                             *
*                        Exception Analysis                                   *
*                                                                             *
*******************************************************************************

*** WARNING: Unable to verify checksum for mscorlib.ni.dll
*** WARNING: Unable to verify checksum for Fewo.exe
Failed to request MethodData, not in JIT code range
GetUrlPageData2 (WinHttp) failed: 12002.

DUMP_CLASS: 2

DUMP_QUALIFIER: 400

CONTEXT:  (.ecxr)
eax=0679bb98 ebx=00000000 ecx=07314e90 edx=00004084 esi=072ae0f0 edi=0678ba50
eip=07314e9c esp=0117ebfc ebp=065fe0d0 iopl=0         nv up ei pl nz na pe nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00210206
fbintl+0x4e9c:
07314e9c 8b86b0000000    mov     eax,dword ptr [esi+0B0h] ds:002b:072ae1a0=????????
Resetting default scope

FAULTING_IP: 
fbintl+4e9c
07314e9c 8b86b0000000    mov     eax,dword ptr [esi+0B0h]

EXCEPTION_RECORD:  (.exr -1)
ExceptionAddress: 07314e9c (fbintl+0x00004e9c)
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 00000000
   Parameter[1]: 072ae1a0
Attempt to read from address 072ae1a0

DEFAULT_BUCKET_ID:  INVALID_POINTER_READ

PROCESS_NAME:  Fewo.exe

ERROR_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%08lx verweist auf Speicher 0x%08lx. Der Vorgang %s konnte nicht im Speicher durchgef hrt werden.

EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%08lx verweist auf Speicher 0x%08lx. Der Vorgang %s konnte nicht im Speicher durchgef hrt werden.

EXCEPTION_CODE_STR:  c0000005

EXCEPTION_PARAMETER1:  00000000

EXCEPTION_PARAMETER2:  072ae1a0

FOLLOWUP_IP: 
fbintl+4e9c
07314e9c 8b86b0000000    mov     eax,dword ptr [esi+0B0h]

READ_ADDRESS:  072ae1a0 

WATSON_BKT_PROCSTAMP:  5a79bf34

WATSON_BKT_PROCVER:  19.0.0.0

PROCESS_VER_PRODUCT:  Fewo-Verwalter

WATSON_BKT_MODULE:  fbintl.dll

WATSON_BKT_MODSTAMP:  5a4f3dbc

WATSON_BKT_MODOFFSET:  4e9c

WATSON_BKT_MODVER:  2.5.8.27089

MODULE_VER_PRODUCT:  Firebird SQL Server

BUILD_VERSION_STRING:  6.3.9600.17415 (winblue_r4.141028-1500)

MODLIST_WITH_TSCHKSUM_HASH:  28a28ee6701404b6c700d2f6f895bb1fee189d67

MODLIST_SHA1_HASH:  3723fd03f36cd2819b8d3aba6a22b5dc14fe39ad

COMMENT:  
*** "C:\Users\TM\Downloads\Procdump\procdump.exe" -accepteula -ma -j "C:\dumps" 2516 264 02C60000
*** Just-In-Time debugger. PID: 2516 Event Handle: 264 JIT Context: .jdinfo 0x2c60000

NTGLOBALFLAG:  0

PROCESS_BAM_CURRENT_THROTTLED: 0

PROCESS_BAM_PREVIOUS_THROTTLED: 0

APPLICATION_VERIFIER_FLAGS:  0

PRODUCT_TYPE:  1

SUITE_MASK:  272

DUMP_FLAGS:  8000c07

DUMP_TYPE:  3

MISSING_CLR_SYMBOL: 0

ANALYSIS_SESSION_HOST:  WIN-D215DQQE10H

ANALYSIS_SESSION_TIME:  02-06-2018 14:48:06.0391

ANALYSIS_VERSION: 10.0.16299.91 x86fre

MANAGED_CODE: 1

MANAGED_ENGINE_MODULE:  clr

MANAGED_ANALYSIS_PROVIDER:  SOS

MANAGED_THREAD_ID: ca4

THREAD_ATTRIBUTES: 
OS_LOCALE:  DEU

PROBLEM_CLASSES: 

    ID:     [0n301]
    Type:   [@ACCESS_VIOLATION]
    Class:  Addendum
    Scope:  BUCKET_ID
    Name:   Omit
    Data:   Omit
    PID:    [Unspecified]
    TID:    [0xca4]
    Frame:  [0] : fbintl

    ID:     [0n273]
    Type:   [INVALID_POINTER_READ]
    Class:  Primary
    Scope:  DEFAULT_BUCKET_ID (Failure Bucket ID prefix)
            BUCKET_ID
    Name:   Add
    Data:   Omit
    PID:    [Unspecified]
    TID:    [0xca4]
    Frame:  [0] : fbintl

    ID:     [0n91]
    Type:   [@SHUTDOWN]
    Class:  Addendum
    Scope:  DEFAULT_BUCKET_ID (Failure Bucket ID prefix)
            BUCKET_ID
    Name:   Omit
    Data:   Omit
    PID:    [0x9d4]
    TID:    [0xca4]
    Frame:  [0] : fbintl

BUGCHECK_STR:  APPLICATION_FAULT_INVALID_POINTER_READ

PRIMARY_PROBLEM_CLASS:  APPLICATION_FAULT

LAST_CONTROL_TRANSFER:  from 101209e0 to 07314e9c

STACK_TEXT:  
WARNING: Stack unwind information not available. Following frames may be wrong.
0117ebfc 101209e0 0679bb98 00000000 1008b5c3 fbintl+0x4e9c
0117ec08 1008b5c3 065fe0d0 00000034 1008b8b6 fbembed!Jrd::Collation::destroy+0x10
0117ec14 1008b8b6 0117f03c 0725b3a8 1006bb6f fbembed!CharSetContainer::destroy+0x43
0117ec20 1006bb6f 729e1b02 065f7b98 07286ae0 fbembed!Jrd::Database::destroyIntlObjects+0x26
0117ec88 10070565 065fe0d0 00000001 729e1a4e fbembed!shutdown_database+0x12f
0117ed98 10070986 07286ae0 065fa054 00000001 fbembed!purge_attachment+0x2e5
0117f0ac 10072922 01000000 729e06e2 00001388 fbembed!shutdown_thread+0x276
0117f1cc 1004197b 00001388 729e057a 07420fe0 fbembed!jrd8_shutdown_all+0x152
0117f254 1004286c 00001388 fffffff9 100309f1 fbembed!fb_shutdown+0xdb
0117f260 100309f1 729e05be 07420fe0 10397304 fbembed!`anonymous namespace'::atExitShutdown+0xc
0117f290 10030a7e 729e0596 07420fe0 10397304 fbembed!Firebird::InstanceControl::destructors+0x41
0117f2b8 101b45a5 00000001 00000000 10000000 fbembed!`anonymous namespace'::allClean+0x2e
0117f2cc 101b4694 10000000 00000000 00000001 fbembed!_CRT_INIT+0x167
0117f310 101b4710 10000000 77229ea6 10000000 fbembed!__DllMainCRTStartup+0xb7
0117f318 77229ea6 10000000 00000000 00000001 fbembed!_DllMainCRTStartup+0x1d
0117f338 77229e22 101b46f3 10000000 00000000 ntdll!LdrxCallInitRoutine+0x16
0117f388 7724da28 00000000 00000001 07f1fe02 ntdll!LdrpCallInitRoutine+0x43
0117f428 7724dad1 00000000 00000001 0117f5d4 ntdll!LdrShutdownProcess+0x101
0117f4f0 76b99862 00000000 77e8f3b0 ffffffff ntdll!RtlExitUserProcess+0x81
0117f504 73c42319 00000000 03149506 00000000 kernel32!ExitProcessImplementation+0x12
0117f784 73c42443 00000000 0117f7c8 73697797 mscoreei!RuntimeDesc::ShutdownAllActiveRuntimes+0x34c
0117f790 73697797 0b1ce570 00000000 0361c114 mscoreei!CLRRuntimeHostInternalImpl::ShutdownAllRuntimesThenExit+0x13
0117f7c8 7369771d 00000000 00000000 7f8be000 clr!EEPolicy::ExitProcessViaShim+0x79
0117f9fc 7369c63c 00000000 00000006 0117fa60 clr!SafeExitProcess+0x129
0117fa0c 7369c683 00000000 00000000 01000000 clr!HandleExitProcessHelper+0x63
0117fa20 7369bc2f 0361ccbc 00000000 73671e30 clr!EEPolicy::HandleExitProcess+0x50
0117fa60 73671e4c 0361cc40 00000000 73671e30 clr!_CorExeMainInternal+0x1b1
0117fa9c 73c3e55b 0314982a 76b87b50 73c30000 clr!_CorExeMain+0x4d
0117fad8 73cbbbcc 73cbbb40 73cbbb40 0117fafc mscoreei!_CorExeMain+0x10e
0117fae8 76b87c04 7f8be000 76b87be0 06192ea9 mscoree!_CorExeMain_Exported+0x8c
0117fafc 7723b90f 7f8be000 07f1f16e 00000000 kernel32!BaseThreadInitThunk+0x24
0117fb44 7723b8da ffffffff 772206e8 00000000 ntdll!__RtlUserThreadStart+0x2f
0117fb54 00000000 73cbbb40 7f8be000 00000000 ntdll!_RtlUserThreadStart+0x1b


THREAD_SHA1_HASH_MOD_FUNC:  ea7732901c979b976412f6b7e961e73d1d06677a

THREAD_SHA1_HASH_MOD_FUNC_OFFSET:  6ba60f5ffec2b62e8999d61abcea1781fc579271

THREAD_SHA1_HASH_MOD:  6bb561229e881632e247e46594f9fe2fa9953f0f

FAULT_INSTR_CODE:  b0868b

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  fbintl+4e9c

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: fbintl

IMAGE_NAME:  fbintl.dll

DEBUG_FLR_IMAGE_TIMESTAMP:  5a4f3dbc

STACK_COMMAND:  ~0s ; .ecxr ; kb

FAILURE_BUCKET_ID:  INVALID_POINTER_READ_c0000005_fbintl.dll!Unknown

BUCKET_ID:  APPLICATION_FAULT_INVALID_POINTER_READ_fbintl+4e9c

FAILURE_EXCEPTION_CODE:  c0000005

FAILURE_IMAGE_NAME:  fbintl.dll

BUCKET_ID_IMAGE_STR:  fbintl.dll

FAILURE_MODULE_NAME:  fbintl

BUCKET_ID_MODULE_STR:  fbintl

FAILURE_FUNCTION_NAME:  Unknown

BUCKET_ID_FUNCTION_STR:  Unknown

BUCKET_ID_OFFSET:  4e9c

BUCKET_ID_MODTIMEDATESTAMP:  5a4f3dbc

BUCKET_ID_MODCHECKSUM:  0

BUCKET_ID_MODVER_STR:  2.5.8.27089

BUCKET_ID_PREFIX_STR:  APPLICATION_FAULT_INVALID_POINTER_READ_

FAILURE_PROBLEM_CLASS:  APPLICATION_FAULT

FAILURE_SYMBOL_NAME:  fbintl.dll!Unknown

WATSON_STAGEONE_URL:  http://watson.microsoft.com/StageOne/Fewo.exe/19.0.0.0/5a79bf34/fbintl.dll/2.5.8.27089/5a4f3dbc/c0000005/00004e9c.htm?Retriage=1

TARGET_TIME:  2018-02-06T13:45:30.000Z

OSBUILD:  9600

OSSERVICEPACK:  17415

SERVICEPACK_NUMBER: 0

OS_REVISION: 0

OSPLATFORM_TYPE:  x86

OSNAME:  Windows 8.1

OSEDITION:  Windows 8.1 WinNt SingleUserTS

USER_LCID:  0

OSBUILD_TIMESTAMP:  2014-10-29 02:58:22

BUILDDATESTAMP_STR:  141028-1500

BUILDLAB_STR:  winblue_r4

BUILDOSVER_STR:  6.3.9600.17415

ANALYSIS_SESSION_ELAPSED_TIME:  7699

ANALYSIS_SOURCE:  UM

FAILURE_ID_HASH_STRING:  um:invalid_pointer_read_c0000005_fbintl.dll!unknown

FAILURE_ID_HASH:  {d36fbd7c-3cbc-9215-91a9-bcb5a863d227}

Followup:     MachineOwner
---------

有人能告诉我错误发生的原因吗？提前谢谢！

更新1：我也尝试过使用Firebird ADO.NET Provider 5.12。错误保持不变。

更新2 ：错误可通过以下步骤重现：

1）使用具有计算索引的表创建数据库：

CREATE DATABASE 'error_demo.fdb' USER 'SYSDBA' PAGE_SIZE 16384 DEFAULT CHARACTER SET WIN1252 COLLATION WIN1252;
CREATE TABLE OBJEKTE (ID INTEGER, TITLE VARCHAR(10));
CREATE INDEX OBJEKTE_IDX1 ON OBJEKTE COMPUTED BY (lower(title));

2）使用Firebird ADO.NET Provider 5.12创建一个小型C＃应用程序，并从表OBJEKTE查询计数并在Windows 8.1上运行（如果应用程序在Windows 10上运行，则不会出现错误）：

string connstring = "User=SYSDBA;Password=masterkey;Database=error_demo.fdb;DataSource=localhost;Port=3050;Dialect=3;Charset=none;Role=;Connection Lifetime=0;Pooling=true;Packet Size=16384;ServerType=1";
FbConnection connts = new FbConnection(connstring);
connts.Open();

FbCommand cmdts = new FbCommand("select count(*) from objekte", connts);

FbDataReader readerts = cmdts.ExecuteReader();

if (readerts.Read())
{
    int wert = readerts.GetInt32(0);
    readerts.Close();
    readerts.Dispose();
    cmdts.Dispose();
    connts.Close();
    connts.Dispose();
    connts = null;
    return wert;
}
else
{
    readerts.Close();
    readerts.Dispose();
    cmdts.Dispose();
    connts.Close();
    connts.Dispose();
    connts = null;
    return -1;
}

现在，如果您关闭应用程序，则会发生错误。这是一个包含小型数据库的示例项目：https://www.dropbox.com/s/hakd3zwdxgraq7s/WindowsFormsApp1.zip?dl=0

如果删除计算出的索引，一切运行良好。

Answer 1

问题是由于连接池处于活动状态，并且在卸载Firebird嵌入式引擎之前连接尚未关闭。我认为这是一个错误，因此我将为Firebird和ADO.net提供商报告。

要解决此问题，您有两种选择：

在连接字符串中指定Pooling=false。与远程主机的TCP / IP连接相比，Firebird嵌入式连接的连接创建性能开销很小，因此使用连接池并不能真正增加这么多的价值。
或者，在应用程序退出之前（或之前）显式调用FbConnection.ClearAllPools()。

至于根本原因：Firebird Embedded尝试在应用程序退出后自行清理（关闭并释放未关闭的连接），但这似乎失败了，因为它依赖于其中一个DLL（可能是fbintl.dll）已经卸下了。据我了解，Windows将以相反的加载顺序卸载DLL，忽略了先前加载的DLL可能依赖于后来加载的DLL的事实。

通过清理连接池（或禁用连接池）确保连接真正关闭，已经释放了所涉及的数据结构。

我已经报告了票证DNET-806，以便在Firebird ADO.net提供程序中修复此问题（通过显式调用之前的清理）。我还在我维护的JDBC驱动程序（for Java）中重现了同样的问题，并将在那里修复它。

如果在我的C＃-App中使用嵌入模式，请在fbintl.dll中应用

1 个答案: