Read/Write PCI Memory

Hi All,
This question may be outside the scope of Java and this forum (appologies if so). However, I'm trying to read/write some PCI memory locations in either Linux or Windows. I'd like to access these locations via Java. Is there any direct method to do this? Is there an API to access more low level hardware? Currently, I can read/write the memory locations with a program called PciTree. So, I know my PCI device is working, and the basic driver for the PCI device is installed.
If this is not possible in Java, I can try C and study the device driver's functionality.

You could write something in C/C++ and then expose methods to Java via JNI. But Java doesn't have built-in support for accessing memory at that level. A third party library may be availble though. Good luck.

Similar Messages

Exception(DoConnect): "Attempted to read/write protected memory. This is of

Hi Experts,
Client is experiencing the following issue when performing task/s in SAP B1, please assist.
SAP B1 version 8.81 PL4
OS Windos 7 32 bit
Error message: Exception(DoConnect): "Attempted to read/write protected memory. This is often indicator that memory is corrupt"
Regards,
David Tengani

Hi
Thanks for your response, Yes there ia addon, XL Reporter and a 3rd party addon.
We tried disabling these addons but the error still shows.
Regards,
David

Read & Write Shared memory with Java

Hi,
I have to read and write from/to shared memory four integers with Java, using Posix package (the shared memory is already created).
I've looking in google for any examples that attachs, read, and write to shared memory using that package but i couldn't find anything (that's the reason to write in this forum).
Posix package link
http://www.bmsi.com/java/posix/docs/Package-posix.html
Operative System
Suse 10
Could anyone help me with any example, please?
Thank you very much
Oscar

Hi, i can't post any code because i have no idea about posix and shared memory.
I came from web world and my company has send me to space department, two weeks ago, that use Unix as its operative system.
The first thing i have to do it's what i post but i don't know even how to start doing it, because this is almost the first time i hear about reading and writing shared memory.
Java is a high level and non-dependent platform (but this kind of things i think are dependent platform, in this case the opearative system) and it's few time since i am working with this operative system.
That's the trouble i don't know how to start working with this.
Thanks again

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Hi there, I'm having a weird issue when I try to connect to my DB server from the machine in which is located.
I am using SSMS to connect to the DB. When i use the name of the sql server, I can connect without issues, but when I replace the name with an IP address and a port, i always get this error:
===================================
Cannot connect to 192.168.1.215,1433.
===================================
Attempted to read or write protected memory. This is often an indication that other memory is corrupt. (System.Data)
Program Location:
at SNINativeMethodWrapper.SNIClose(IntPtr pConn)
at System.Data.SqlClient.SNIHandle.ReleaseHandle()
at System.Runtime.InteropServices.SafeHandle.InternalDispose()
at System.Runtime.InteropServices.SafeHandle.Dispose(Boolean disposing)
at System.Runtime.InteropServices.SafeHandle.Dispose()
at System.Data.SqlClient.TdsParserStateObject.Dispose()
at System.Data.SqlClient.TdsParser.Disconnect()
at System.Data.SqlClient.SqlInternalConnectionTds.LoginFailure()
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance,
SqlConnectionString userConnectionOptions, SessionData reconnectSessionData)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.Open()
at Microsoft.SqlServer.Management.SqlStudio.Explorer.ObjectExplorerService.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
But this only happens when I try to connect from the PC in which the sql server is, when I try to connect by TCP/IP from another machine on the same network, I can login without problems.
Any help will be appreciated.

Hello,
Lot of similar issues related to your post please check if any one is of any help
Attempt to read write protected memory
Similar issue answered here
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers
My TechNet Wiki Articles

"Attempted to read or write protected memory" error in loading a report.

Development Environment
===
Windows XP
Visual Studio 2008 Pro; with Crystal Reports 2008 for Visual Studio
TagetCPU: 'AnyCPU'
VB.net 3.5
Windows dll
Crystal Reports Runtime SP2 (12.2.0.290)
Deployment Environment
===
Windows XP
.net3.5
Crystal Reports Runtime SP3 (no be confirmed)
I have created a windows dll with a form with a reportdocument, that loads a report (CrystalDecisions.CrystalReports.Engine.ReportDocument).
Then we circle through the report setting every table location to point at a specific ODBC and database.
The Dll can do this process several hundred reports in a day. However a small number (less than 10) of these have the following error:
"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
This is normally occurring when the reportDocument.Load function is called. But also happens when going through the setting of table locations: [myTable.ApplyLogOnInfo(TmpTableLogOnInfo)
The dll is called via COM interop and so i have checked "Register for COM interop".
Simon@Sanderson

1) Get to SP 3:
for dev computer:
https://smpdl.sap-ag.de/~sapidp/012002523100007123572010E/cr2008_sp3.exe
Recompile the app after SP3 is applied.
for SP3 runtime:
MSI
https://smpdl.sap-ag.de/~sapidp/012002523100007123592010E/cr2008sp3_redist.zip
MSM
https://smpdl.sap-ag.de/~sapidp/012002523100007123582010E/cr2008sp3_mm.zip
(You will have to uninstall SP 2 runtime before installing SP 3 runtime)
2) Do not use "Any CPU". CR2008 is only 32 bit anyhow so use 32 bit.
3) Make sure you are using .Close and .Dispose once you are done with each report object
- Ludek

PInvoke - Issue while calling DJVU function from C# Code - Attempted to read or write protected memory

Hi,
I know there are many questions in this subject but none of them help to resolve the issue I am currently facing.
Below is the signature of C Function from DJVULibre added in .NET code
[DllImport("C:\\Program Files\\DJVULIBRE\\LIBDJVULIBRE.dll", CharSet=CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
private unsafe static extern int ddjvu_page_render(IntPtr page, ddjvu_render_mode_t mode, IntPtr pagerect,
IntPtr renderrect,
IntPtr pixelformat,
ulong rowsize,
[Out][MarshalAs(UnmanagedType.LPArray)]byte[] imagebuffer);Below is how I am calling this function in the c# codebyte* buffer = (byte *)Memory.Alloc(nSize);
try
IntPtr ptr1 = (IntPtr)Memory.Alloc(Marshal.SizeOf(prect));
Marshal.StructureToPtr(prect, ptr1, false);
IntPtr ptr2 = (IntPtr)Memory.Alloc(Marshal.SizeOf(rrect));
Marshal.StructureToPtr(rrect, ptr2, false);
byte[] array = new byte[nSize];
fixed (byte* p = array) Memory.Copy(buffer, p, nSize);
ddjvu_page_render(page, ddjvu_render_mode_t.DDJVU_RENDER_MASKONLY, ptr1, ptr2, fmt, (ulong)stride, array);
finally
Memory.Free(buffer);
}call to ddjvu_page_render in above code is throwing "Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
Prior to this post I must have tried all the option could find in various blogs.
Appreciate any help, is almost a day I am clueless, your timely help could save my job

Thanks Viorel, below is the definition of original C function
DDJVUAPI int
ddjvu_page_render(ddjvu_page_t *page,
const ddjvu_render_mode_t mode,
const ddjvu_rect_t *pagerect,
const ddjvu_rect_t *renderrect,
const ddjvu_format_t *pixelformat,
unsigned long rowsize,
char *imagebuffer );below is how the code is calling this function in C#, the in pointers are all valid pointer I checked in debugging window byte* buffer = (byte *)Memory.Alloc(nSize);
try
IntPtr ptr1 = (IntPtr)Memory.Alloc(Marshal.SizeOf(prect));
Marshal.StructureToPtr(prect, ptr1, false);
IntPtr ptr2 = (IntPtr)Memory.Alloc(Marshal.SizeOf(rrect));
Marshal.StructureToPtr(rrect, ptr2, false);
byte[] array = new byte[nSize];
fixed (byte* p = array) Memory.Copy(buffer, p, nSize);
ddjvu_page_render(page, ddjvu_render_mode_t.DDJVU_RENDER_MASKONLY, ptr1, ptr2, fmt, (ulong)stride, array);
finally
Memory.Free(buffer);

AccessViolationException: Attempted to read or write protected memory.

Hello all.
The application that I am working on has a Oracle DB 10g and we want to migrate the DB to 11g (11.2.0.2). The client OS is a Windows 7 x64 and the application (which is an x86 app) is a hybrid between .NET and C++(COM components). The .NET part is using ODP.NET components and the C++ part is using ODBC drivers (oraclient 11.2.0.1 - x86 version).
The problem is that the application works without any problems with the 10g DB but when switching to 11g we get an exception. Basically, we have a try { call COM component } catch(Ex ex) {...} and the Exception ex is a AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. I debugged the C++ part and this strange thing happens: the component opens the connection (using a connection string like this : "driver={Oracle in OraClient}; uid=... pwd=.. "), executes some queries, and on one query (which is the same as the last ones - just some selects), when the data is processed (by data I mean a integer ID), the exception is thrown in .NET code. I was able to enter in afxdb.cpp and it looks like the exception is thrown when GetData method is called. I looked over the ID's from previous queries and the data passed to GetData method is about the same (I mean the fieldtype, index, len, SQL type).
As solutions I tried:
-set "Statement Cache Purge=true" => same effect
- install a instantclient11_2 basic and ODBC drivers (for 11.2.0.2) but I could not connect to the DB (I could find the new drivers in registry WoW64Node/ODBC Drivers, put the location in PATH in front of the other OraClient and replace the OraClient with the name in registry in conn string) => Specified driver could not be loaded due to system error 127.
- tried to see the Marshal.GetLastWin32Error() => returns 0.
Any ideas? :D
Edited by: 917334 on Feb 27, 2012 12:57 PM

The select clause that causes the problem is actually a select over a view. I replaced the select * from MYView with the actual select clause (with inner join) and the issue disappeared.
Any ideas? :)
Solution:
Looks like the view was written using INNER JOIN stuff. I replaced the code from the view with a simple select like this (inner join free):
select table1.col1, table2.col2, table3.col2, from table1, table2, table3 where table1.col1 = table2.col1 and table1.col1 = table3.col1
Some questions still remain (even if my issue is partially solved):
- why was it working on 10g?
- why this particular view crashed? (there are other views that use inner join and don't cause this)
- why was it working when using the full select (with inner join) and not working when selecting over the view?
Edited by: 917334 on 28.02.2012 08:33

SSRS 2008 R2 - on Preview report in report builder itself, getting an error "Attempted to read or write protected memory. This is often an indication that other memory is corrupt". Any Suggestions please to resolve it?

Hi,
I am working on SSRS 2008 R2. On Preview report in report builder itself, i am getting an error "Attempted to read or write protected memory. This is often an indication that other memory is corrupt".
See my below screen shoot.
Any Suggestions please to resolve it?
thank you in advance !
best regards,
Venkat,
[email protected]

Hi Venkat,
According to the error message, I guess that the error occurred when you previewed the report in Business Intelligence Development Studio (BIDS).
Based on my research, I think it may be a Window Layout issue of Visual Studio. Please try the steps below:
Click “Window” button from the toolbar ribbon.
Click “Reset Windows Layout” option.
Click “Yes” to finish the operation.
The following thread is for your reference:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/90949d68-a611-467c-b438-be97b8ab250b/attempted-to-read-or-write-protected-memory-this-is-often-an-indication-that-other-memory-is
Hope this helps.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support

Attempted to read or write protected memory error

Hello,
I am using the .Net library and occasionally I get a System.AccessViolationException,"Attempted to read or write protected memory. This is often an indication that other memory is corrupt." Currently it is occurring when trying to initialize a TypedTPINIT object (this has happened in other places before and we just retry the request as a work-around). I set the size equal to the password length + 2 and the constructor for TypedTPINIT throws the exception after making the call to tpaloc. I have code that catches the exception and tries again up to 5 times before bubbling the exception up the chain. Once this exception occurs, no calls can be made to tux, they all throw the same exception. Once the application is closed and restarted (restarting the win32 process), everything works fine with the same data. It will work for a day or two and then fowl up again, seemingly at random. I am unable to reproduce the error at will, we just see it popup now and again, but closing the process and restarting it makes it go away for a while.
Any idea why this exception is happening?
I tried taking the .Net library out of the question and make the call to tpalloc myself using p/invoke and the same thing happens, but not every time.
I appreciate any help you can provide.
~Jason

Hi Jason,
I would suggest using a memory access checking tool like bounds checker, electric fence, or the like, although I don't know what's available in a .NET environment.
Regards,
Todd Little
Oracle Tuxedo Chief Architect

Attempted to read or write protected memory error on reportdocument.load

Reportdocument.load causes "System.AccessViolationException: Attempted to read or write protected memory" error.
The error is not consistent. Sometimes a report will print. Sometimes a report will error.
I am at a loss as to what to try.
I have uninstall the app, reinstalled the app, uninstall and reinstalled .NET frameworks, Visual C++ runtime, etc.,
reworked the code to try to capture the error. Nothing helps. Application crashes with Unhandled exception.
Attempted to read or write to protected memory.
Has anyone been able to resolve this issue?

Hi Mary,
What happens if you set your project to use 4.0 framework?
Anything else in the Event Viewer to show an access violation?
Have you tried updating the printer driver to one that is supported in the Framework? I find most legacy printers tend to use the old DEVMODE structure and not the Framework. Try using the printer off the Window CD rather than the Manufacturers driver.
Is your app doing "Report Bursting"? In other words sending multiple reports one right after the other with no time between?
Are you using any legacy UFL's? Try renaming u2lcom.dll if you are not using them. If you do you'll get an error in formula.
Are you using try/catch in your code around each CR API? It may catch something more for you also.
AND, can you try a C# project, some thing very simple also. I've of issues in VS VB that do not show up in other dev languages. Neither Microsoft or SAP can figure out what the cause is.
Thank you
Don
Edited by: Don Williams on Feb 11, 2011 2:34 PM

Attempted to read or write protected memory source CR for VS 2010

Hye everyone,
I'm working on VS2010 : C# Application WPF.
When I try to instance a Crystal Report, I receive this message
CrystalReport2 newCR = new CrystalReport2();
Attempted to read or write protected memory.
source=crystaldecisions.crystalreports.engine
at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.CreateRptDoc()
   at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper..ctor()
   at CrystalDecisions.CrystalReports.Engine.ReportDocument.Initialize()
   at CrystalDecisions.CrystalReports.Engine.ReportDocument..ctor()
   at CrystalDecisions.CrystalReports.Engine.ReportClass..ctor()
When I'm debugging I can see the report but when I stop the application I've got a "vshost32.exe has stopped working"
If I use the exe file of my application, I can't see the report and I've got a "MyApplication has stopped working". He never enters the constructor of my report.
For my report I use .net objects for Database Fields
Please help needed
Gridin

See the WPF demo here:
http://www.sdn.sap.com/irj/scn/elearn?rid=/library/uuid/a09f7025-0629-2d10-d7ae-df006a51d1a8
Do you get the same issue using the steps described in the demo?
Also, see the kBase [1544651 - Crystal Reports WPF Viewer fails with NullReferenceException when used in a WinForms application|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333533343334333633353331%7D.do].
Ludek
Follow us on Twitter http://twitter.com/SAPCRNetSup
Got Enhancement ideas? Try the [SAP Idea Place|https://ideas.sap.com/community/products_and_solutions/crystalreports]

System.AccessViolationException:Attempted to read or write protected memory

Hi,
I am using Asp.net with oracle 10 g in my application , it is working perfectly in my machine. i have installed Oracle 10 g in my machine. but i did not installed oracle 10 g in server
but i am running an application from the server. i got this Error:
Attempted to read or write protected memory.This is often an indication that other memory is corrupt.
Please Help me.
Thanks.

Hi,
try to set the
ProxyCreationEnabled property of dbContext is set to true.

Attempted to read or write protected memory

Imports Axzkemkeeper
Imports zkemkeeper
Public Class Form11
Dim q As New Axzkemkeeper.AxCZKEM
Dim con As Boolean = False
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
'Try
' q.CreateControl()
' con = q.Connect_Net("192.168.0.202", CInt(4370))
' If con Then
' MsgBox("yes")
' Else
' MsgBox("fuck!")
' End If
'Catch ex As Exception
' MsgBox(ex.Message)
'End Try
q.CreateControl()
'q.SkinAllThreads()
con = q.Connect_Net("192.168.0.202", CInt(4370))
If con Then
MsgBox("yes")
Else
MsgBox("oh shoot!")
End If
End Sub
End Class
i try to connect biometric device from vb using axzkemkeeper.dll but i comes with error:
An unhandled exception of type 'System.AccessViolationException' occurred in AxInterop.zkemkeeper.dll
Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
i really thanksful with any advice you give....
best regards...
Exception is:
An unhandled exception of type 'System.AccessViolationException' occurred in AxInterop.zkemkeeper.dll Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Please refrain from the profanity.
The problem appears to be from inside Axzkemkeeper.AxCZKEM. Whatever that is... I am unable to help with the code you provided.
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Attempt to read or write protected memory VS 2010

I can't run orr debug my program anymore. The message attempt to read or write protected memory. Other 2012 has no problems.
Rinaldo
Full of ideas but don't know how. Coding for fun.
System.AccessViolationException was unhandled
HResult=-2147467261
Message=Poging tot het lezen of schrijven van beveiligd geheugen. Dit duidt er vaak op dat ander geheugen is beschadigd.
Source=mscorlib
StackTrace:
       bij System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       bij System.AppDomain.nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       bij System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       bij Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       bij System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       bij System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       bij System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       bij System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       bij System.Threading.ThreadHelper.ThreadStart()
InnerException:

For the VS 2010 project if the .exe inside the debug folder (unless you are compiling for release then the release folder) is executed outside of VS 2010 does the same issue occur?
Also VS 2010 I believe required some updates. Perhaps this tool
VersionInfo (Version information about your Visual Studio 2010 installation, and how to keep it updated to the latest) could provide if there are any issues with your VS 2010.
On the other hand what originally occured with this project? It was created on VS 2010 and never worked then a copy of it was used with VS 2012 and all the sudden it worked? Or for some reason on VS 2010 it was working then one day suddenly memory issues
began occuring?
If the "one day suddenly memory issues began occuring" was the issue then that would be the day to get assistance. As anything could've happened that day that possibly could've been traced rather easily where however much time has gone by now and
whatever else has been done with that system between then and now may make that extremely difficult to impossible.
La vida loca

Attempted to read or write protected memory in SAP 8.81 PL5

Hi
I seem to be suddenly getting lots of 'attempted to read or write protected memory' in an application I am writing using the B1DE
It seems to fail either when connecting to SAP or when initialising a recordset command
I have tried the usual tricks -
delete SM_OBS_DLL folder
reinstall client
reinstall DI API
I am on SAP 8.81 PL5
It's causing me real problems as I can hardly run my vb.net application
Can anyone help please ?
Many Thanks
Regards Andy

Hi all
Thanks for your answers.
At the moment I have found if I turn off all breakpoints the code runs fine.
I will try your answers but I have lost a lot of time on this and I have a deadline looming
Thanks again
Regards Andy

Read/Write PCI Memory

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