问
使用简单MAPI TEmail组件进行日志记录时出现死锁
js陈富军中草药 发布于 2023-01-02 11:50我们正在使用免费软件MAPI/SMAPI实现间歇性死锁.我怀疑实现是否有问题但是可能将登录标志更改为MapiLogon或Exchange上的配置设置可以解决此问题.
Result := MapiLogon(0, LogonProfile, LogonPassword, flLogonFlags, 0, @hSession);
为@J 添加了cudo
不鼓励使用简单MAPI.正确的操作是开始使用扩展MAPI或Outlook对象模型.虽然我同意这一说法,但我没有任何影响力来实现这一点.
当前设置的解决方案或理解为什么会发生死锁的解决方案仍然很难实现.
简而言之
线程0b60调用MapiLogof
在logof期间,它等待线程 0894
线程0894等待临界区036c
Critical部分036c被线程锁定0b60
僵局
内核转储显示以下关键部分被线程锁定并拥有 b60
CritSec EMSMDB32!ScStatClose+17ac7 at 354650d0
WaiterWoken No
LockCount 1
RecursionCount 1
OwningThread b60
EntryCount 0
ContentionCount 1
*** Locked
线程的0b60调用堆栈
内核线程对象88a53758
注意KeWaitForSingleObjectwith参数87fc3c68是线程0894
b8b4fcec 8093b2e4 87fc3c68 00000006 00000001 nt!KeWaitForSingleObject+0x346 (FPO: [Non-Fpo])
b8b4fd50 8088b658 00000184 00000000 00000000 nt!NtWaitForSingleObject+0x9a (FPO: [Non-Fpo])
b8b4fd50 7c82845c 00000184 00000000 00000000 nt!KiSystemServicePostCall (FPO: [0,0] TrapFrame @ b8b4fd64)
0012f618 7c827b79 77e61d06 00000184 00000000 ntdll!KiFastSystemCallRet (FPO: [0,0,0])
0012f61c 77e61d06 00000184 00000000 00000000 ntdll!NtWaitForSingleObject+0xc (FPO: [3,0,0])
0012f68c 77e61c75 00000184 ffffffff 00000000 kernel32!WaitForSingleObjectEx+0xac (FPO: [Non-Fpo])
0012f6a0 3540fc13 00000184 ffffffff 02102150 kernel32!WaitForSingleObject+0x12 (FPO: [Non-Fpo])
0012f6b4 3540a226 7c81a1a8 3540546f 02102108 EMSMDB32!XPProviderInit+0x58d5
0012f6bc 3540546f 02102108 00db29c0 0012f6f0 EMSMDB32!MSProviderInit+0x16af6
0012f6d0 3553ce40 02102108 35411e97 02102108 EMSMDB32!MSProviderInit+0x11d3f
00000000 00000000 00000000 00000000 00000000 MSMAPI32!UlRelease+0xe
/* Reconstructed from MAP file */
0012f878 00422b81 21B81 mailrequestserver+0x22b81 0001:00021B70 MapiLogoff
0012f894 00423dde 22DDE mailrequestserver+0x23dde 0001:00022DB0 TEmail.Logoff
线程的0894调用栈是
内核线程对象87fc3c68
注意EMSMDB32!ScStatClose调用导致RtlpWaitOnCriticalSection参数0000036c是线程拥有的关键部分0b60
0231ff80 7c83d0f7 0000036c 00000004 00000000 ntdll!RtlpWaitOnCriticalSection+0x1a3 (FPO: [Non-Fpo])
0231ffa0 3544d394 354650d0 00000000 00000001 ntdll!RtlEnterCriticalSection+0xa8 (FPO: [Non-Fpo])
0231ff98 354650d0 EMSMDB32!ScStatClose+0x17ac7
0231ffa4 3544d394 EMSMDB32!EcUnregisterPushNotification+0x12033
0231ffa8 354650d0 EMSMDB32!ScStatClose+0x17ac7
0231ffb4 3544d114 EMSMDB32!EcUnregisterPushNotification+0x11db3
题
调用堆栈显示有UnregisterPushNotifications涉及的内容.搜索推送通知,我找不到任何理由为什么我们需要它(我们只是登录,发送邮件和日志)但是,因为这完全发生在MAPI中,我不知道如何阻止呼叫发生.
如果不能以某种方式忽略/禁用推送通知,那么任何指向其他可能导致/解决此问题的指针都是非常受欢迎的.
一些额外的信息
两个线程都属于同一个进程
MSMAPI32.dll 是版本10.0.6861.0
EMSMDB32.dll 是版本10.0.6742.0
来自SMapi.pas的相关代码
function MapiLogoff(lhSession : LHANDLE;
ulUIParam : ULONG;
flFlags : ULONG;
ulReserved : ULONG): ULONG;
function MapiLogon(ulUIParam : ULONG;
lpszName : PChar;
lpszPassword: PChar;
flFlags : ULONG;
ulReserved : ULONG;
lplhSession : LPLHANDLE): ULONG;
function MapiSendMail(lhSession : LHANDLE;
ulUIParam : ULONG;
lpMessage : lpMapiMessage;
flFlags : ULONG;
ulReserved : ULONG): ULONG;
procedure InitializeSMAPI;
var
OldErrorMode: Word;
OSVersionInfo: TOSVersionInfo;
RegHandle: HKEY;
MapiDetectBuf: array[0..8] of Char;
MapiDetectBufSize: Windows.DWORD;
RegValueType: Windows.DWORD;
begin
{ first check wether MAPI is available on the system; this is done
as described in the MS MAPI docs }
OSVersionInfo.dwOSVersionInfoSize := SizeOf(OSVersionInfo);
GetVersionEx(OSVersionInfo);
if (OSVersionInfo.dwMajorVersion > 3) or { NT 4.0 and later }
{ earlier than NT 3.51 }
((OSVersionInfo.dwMajorVersion = 3) and (OSVersionInfo.dwMinorVersion > 51)) then
begin
if RegOpenKeyEx( HKEY_LOCAL_MACHINE,
'SOFTWARE\Microsoft\Windows Messaging Subsystem',
0, KEY_READ, RegHandle) <> ERROR_SUCCESS then
begin
exit;
end;
MAPIDetectBufSize := SizeOf(MAPIDetectBuf);
if RegQueryValueEx( RegHandle, 'MAPI', nil, @RegValueType,
PByte(@MAPIDetectBuf), @MAPIDetectBufSize) <> ERROR_SUCCESS then
begin
exit;
end;
RegCloseKey(RegHandle);
{ "boolean" integer --> is == "1"? }
if not ((MAPIDetectBuf[0] = '1') and (MAPIDetectBuf[1] = #0)) then
exit;
end
else
if GetProfileInt('Mail', 'MAPI', 0) = 0 then { 16 bit and NT 3.51 detection logic }
Exit;
OldErrorMode := SetErrorMode(SEM_FAILCRITICALERRORS + SEM_NOOPENFILEERRORBOX);
DLLHandle := LoadLibrary(DLLName32); { start without .DLL attached }
{ OldErrorMode := } SetErrorMode(OldErrorMode);
if DLLHandle = 0 then { got an error }
begin
OldErrorMode := SetErrorMode(SEM_FAILCRITICALERRORS + SEM_NOOPENFILEERRORBOX);
try
DLLHandle := LoadLibrary(DLLName32DLL);
if DLLHandle = 0 then
begin
exit; { second attempt did not work out either }
end;
finally
{ OldErrorMode := } SetErrorMode(OldErrorMode);
end;
end;
begin
DllInitialized := true;
@FnMapiFindNext := GetProcAddress(DLLHandle, 'MAPIFindNext');
@FnMapiLogoff := GetProcAddress(DLLHandle, 'MAPILogoff');
@FnMapiLogon := GetProcAddress(DLLHandle, 'MAPILogon');
@FnMapiSendMail := GetProcAddress(DLLHandle, 'MAPISendMail');
@FnMapiReadMail := GetProcAddress(DLLHandle, 'MAPIReadMail');
@FnMapiDeleteMail := GetProcAddress(DLLHandle, 'MAPIDeleteMail');
@FnMapiResolveName := GetProcAddress(DLLHandle, 'MAPIResolveName');
@FnMapiFreeBuffer := GetProcAddress(DLLHandle, 'MAPIFreeBuffer');
@FnMapiAddress := GetProcAddress(DLLHandle, 'MAPIAddress');
@FnMapiSaveMail := GetProcAddress(DLLHandle, 'MAPISaveMail');
if (@FnMapiAddress = nil)
or (@FnMapiFreeBuffer = nil)
or (@FnMapiResolveName = nil)
or (@FnMapiDeleteMail = nil)
or (@FnMapiReadMail = nil)
or (@FnMapiSendMail = nil)
or (@FnMapiLogon = nil)
or (@FnMapiLogoff = nil)
or (@FnMapiFindNext = nil)
or (@FnMapiSaveMail = nil) then
begin
raise EMAPIdllerror.Create(SMapiGetProcAdressFailed);
end;
end;
end;
来自Email.pas的相关代码
destructor TEmail.Destroy;
begin
...
try
if hSession <> 0 then
Logoff;
except
end;
end;
function TEmail.Logon: Integer;
const
ProfileKey95 = 'Software\Microsoft\Windows Messaging Subsystem\Profiles';
ProfileKeyNT = 'Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles';
var
LogonProfile : PChar;
LogonPassword: PChar;
ProfileKey : PChar;
Reg : TRegistry;
begin
CheckMapi;
Result := SUCCESS_SUCCESS;
{ Check if already logged in. }
if hSession = 0 then
begin
if FUseDefProfile then
begin
Reg := TRegistry.Create;
try
{ get platform (Win95/NT) dependent profile key }
{ code added by Ulrik Schoth schoth@krohne.mhs.compuserve.com }
if Reg.KeyExists(ProfileKeyNT) then
begin
ProfileKey := ProfileKeyNT;
end
else
begin
ProfileKey := ProfileKey95;
end;
Reg.Rootkey := HKEY_CURRENT_USER;
if Reg.OpenKey(ProfileKey, False) then
begin
try
FProfile := Reg.Readstring('DefaultProfile');
except
FProfile := '';
end;
end;
finally
Reg.Free;
end;
end;
LogonProfile := nil;
LogonPassword := nil;
try
if Length(FProfile) > 0 then
begin
LogonProfile := StrPCopy(StrAlloc(Length(FProfile)+1), FProfile);
end;
if Length(FPassword) > 0 then
begin
LogonPassword := StrPCopy(StrAlloc(Length(FPassword)+1), FPassword);
end;
DoBeforeLogon;
Result := MapiLogon(0, LogonProfile, LogonPassword, flLogonFlags, 0, @hSession);
if Result <> SUCCESS_SUCCESS then
Result := MapiLogon(0, nil, nil, flLogonFlags or MAPI_Logon_UI, 0, @hSession);
if Result = SUCCESS_SUCCESS then
DoAfterLogon
else
DoMapiError(Result);
finally
StrDispose(LogonProfile);
StrDispose(LogonPassword);
end;
end;
end;
function TEmail.SendMailEx(DoSave: boolean): Integer;
var
MapiMessage : TMapiMessage;
MapiRecipDesc : TMapiRecipDesc;
MapiFileDesc : TMapiFileDesc;
lpRecipArray : TlpRecipArray;
lpAttachArray : TlpAttachArray;
lpszPathname : TlpszPathname;
lpszFileName : TlpszFileName;
szSubject : PChar;
szText : PChar;
szMessageId : PChar;
szMessageType : PChar;
Attachment : SString;
flFlags : ULONG;
flLogoff : Boolean;
i : Integer;
nRecipients : Integer;
nAttachments : Integer;
begin
CheckMapi;
{make sure the cleanup does not free garbage }
lpRecipArray := nil;
lpAttachArray := nil;
flLogoff := False;
{check our built-in limits - which have effectively been removed }
nRecipients := Frecip.Count + FCC.Count + FBCC.Count;
if nRecipients > RECIP_MAX then
begin
Result := MAPI_E_TOO_MANY_RECIPIENTS;
DoMapiError(Result);
exit;
end;
nAttachments := FAttachment.Count;
if nAttachments > ATTACH_MAX then
begin
Result := MAPI_E_TOO_MANY_FILES;
DoMapiError(Result);
exit;
end;
{ begin the work }
try
flLogoff := (hSession = 0);
{ Logon to mail server if not already logged on. }
if Logon <> SUCCESS_SUCCESS then
begin
Result := MAPI_E_LOGIN_FAILURE;
DoMapiError(Result);
exit;
end;
{ Initialise MAPI structures and local arrays. }
FillChar(MapiMessage, SizeOf(TMapiMessage), 0);
FillChar(MapiRecipDesc, SizeOf(TMapiRecipDesc), 0);
FillChar(MapiFileDesc, SizeOf(TMapiFileDesc), 0);
lpRecipArray := TlpRecipArray(StrAlloc(nRecipients*SizeOf(TMapiRecipDesc)));
FillChar(lpRecipArray^, StrBufSize(PChar(lpRecipArray)), 0);
lpAttachArray := TlpAttachArray(StrAlloc(nAttachments*SizeOf(TMapiFileDesc)));
FillChar(lpAttachArray^, StrBufSize(PChar(lpAttachArray)), 0);
{ Fill in subject & message text. }
szSubject := nil;
szText := nil;
szMessageId := nil;
szMessageType := nil;
try
if Length(FSubject) > 0 then
begin
szSubject := StrAlloc(length(FSubject) + 1);
StrPCopy(szSubject, FSubject);
end;
MapiMessage.lpszSubject := szSubject;
if Length(FText) > 0 then
begin
szText := StrAlloc(length(FText) + 1);
StrPCopy(szText, FText);
end;
MapiMessage.lpszNoteText := szText;
{ for non-IPM messages }
if Length(FMessageType) > 0 then
begin
szMessageType := StrAlloc(Length(FMessageType) + 1);
StrPCopy(szMessageType, FMessageType);
end;
MapiMessage.lpszMessageType := szMessageType;
if FpLongText <> nil then
MapiMessage.lpszNoteText := FpLongText;
{ check and fill in recipients if any}
nRecipients := 0;
ListToRecipArray(FRecip, MAPI_TO, lpRecipArray, nRecipients);
ListToRecipArray(FCC, MAPI_CC, lpRecipArray, nRecipients);
ListToRecipArray(FBcc, MAPI_BCC, lpRecipArray, nRecipients);
MapiMessage.nRecipCount := nRecipients;
flFlags := 0; { Don't display MAPI Dialog if recipient specified. }
MapiMessage.lpRecips := @lpRecipArray^;
{ Process file attachments. }
nAttachments := 0;
for i := 0 to (Fattachment.Count - 1) do
begin
Attachment := CheckAttachment(Fattachment.Strings[i]);
if Length(Attachment) = 0 then
begin
Result := MAPI_E_ATTACHMENT_NOT_FOUND;
DoMapiError(Result);
exit;
end;
lpAttachArray^[i].nPosition := Integer($FFFFFFFF); {Top of message. }
lpszPathname := new(TlpszPathname);
lpAttachArray^[i].lpszPathName := StrPcopy(lpszPathname^, Attachment);
{ begin code added by MJK }
lpszFileName := new(TlpszFileName);
{ truncate attachment filename if desired }
if FTruncAttFN then
begin
{ truncate }
lpAttachArray^[i].lpszFileName :=
StrPCopy(lpszFileName^, TruncAttachmentFN(ExtractFileName(Attachment)))
end
else
begin
{ leave alone }
lpAttachArray^[i].lpszFileName :=
StrPCopy(lpszFileName^, ExtractFileName(Attachment));
end;
{end code added by MJK}
Inc(nAttachments);
end;
MapiMessage.nFileCount := nAttachments;
if nAttachments > 0 then
begin
MapiMessage.lpFiles := @lpAttachArray^;
end
else
begin
MapiMessage.lpFiles := nil;
end;
{ receipt requested ? }
if FAcknowledge then
MapiMessage.flFlags := MapiMessage.flFlags or MAPI_RECEIPT_REQUESTED;
{ finally send the email message }
DoBeforeSendMail;
Result := MapiSendMail(hSession, 0, @MapiMessage, flFlags, 0);
if Result = SUCCESS_SUCCESS then
DoAfterSendMail
else
DoMapiError(Result);
finally
StrDispose(szSubject);
StrDispose(szText);
StrDispose(szMessageID);
StrDispose(szMessageType);
end;
finally
{ dispose of the recipient & CC name strings }
if Assigned(lpRecipArray) then
for i := 0 to (nRecipients - 1) do
begin
if Assigned(lpRecipArray^[i].lpszName) then
Dispose(lpRecipArray^[i].lpszName);
if Assigned(lpRecipArray^[i].lpszAddress) then
Dispose(lpRecipArray^[i].lpszAddress);
end;
{ dispose of the recipient/CC/BCC array }
StrDispose(PChar(lpRecipArray));
{ dispose of the attachment file name strings }
if Assigned(lpAttachArray) then
for i := 0 to (nAttachments - 1) do
begin
Dispose(lpAttachArray^[i].lpszPathname);
Dispose(lpAttachArray^[i].lpszFileName);
end;
{ dispose of the attachment array }
StrDispose(PChar(lpAttachArray));
{ Auto logoff, if no session was active. }
if flLogoff = True then
Logoff;
end;
end;
PS.我无法发布转储,它是4GB,但随时可以询问我可能遗漏的任何其他所需细节
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