DISQUS

Michael · 5 months ago

So who is in charge of this to fix this annoying bug? I don't think it's Microsoft actually - so I guess CG is responsible to hot fix this in their latest flagship D2009 (and hopefully not in an upcoming version)

Michael

Olaf Monien · 5 months ago

CG will certainly say, that D2009 was released before Win7 and Win7 is not even officially released yet.
I talked to some Q&A guy of CodeGear, he checked that error on their current internal build, and the error does not seem to be reproducible anymore. So chances are that we might get an update somewhen.

One question here is certainly: what will be released earlier? Delphi next version (Weaver) or Win7?

Michael · 5 months ago

Regarding your last question: In this case I would prefer Win 7 to be released earlier. Let's see if the Delphi community has got enough power to 'force' CG to release a hot fix for this issue.

Michael

remko · 5 months ago

Interesting issue. If we look into the pseudo code of this function:
*(_DWORD *)(a1 + 3548) = 65551;
if ( SetThreadContext(*(HANDLE *)(v1 + 684), (const CONTEXT *)(a1 + 3548)) != 1 )
{
if ( byte_455BAC )
{
v8 = GetLastError();
v9 = (*(int (__cdecl **)(int))(*(_DWORD *)v1 + 132))(v1);
sub_401B08("setContext osTId 0x%x failed %d", v9, v8);
}
if ( "SetThreadContext failed" )
sub_40C6AC("(!\"SetThreadContext failed\")", "..\\win32src\\thread32.cpp", 434);
}

We can see that the Context flag is set to 65551 and if we look into the comments in the header file (winnt.h):
#define CONTEXT_AMD64 0x100000
#define CONTEXT_i386 0x00010000
...
#define CONTEXT_SEGMENTS (CONTEXT_i386 | 0x00000004L) // DS, ES, FS, GS

so all other flags are combines with either CONTEXT_AMD64 or CONTEXT_i386. It might be worth trying to patch this flag to the corresponding value for AMD64. If someone wants to try:
.text:0043C7F5 C7 83 DC 0D 00 00 0F 00 01 00 mov dword ptr [ebx+0DDCh], 1000Fh

/edit: found this link: http://www.nynaeve.net/?p=129

Olaf Monien · 5 months ago

Thanks for your comment - esp. for the highly interesting link about GetThreadConbtext on WOW64

remko · 5 months ago

I don't have an x64 os so I can't try but you can also try to make the following change:
C7 83 DC 0D 00 00 0F 00 01 00 to C7 83 DC 0D 00 00 15 00 01 00

It changes the Context flag from 65551 (CONTEXT_FULL or CONTEXT_FLOATING_POINT) to 65557 (CONTEXT_ALL)

Name · 5 months ago

Have tested it .. Changed 0x0F to 0x15

Additional assertion errors not seen before occured.

Name · 5 months ago

Thanks a million, dude. From your information I have a created a fully automatic patcher. The patcher has been used by 8 colleagues (so far) of mine, and they all report success .. no more assertion errors.

Olaf Monien · 5 months ago

Whohoo! Do you mind sharing that patcher? If you don't have a webspace, I can easily host it here on the blog.

Name · 5 months ago

I dont mind at all.

Please instruct me where to upload (FTP?), or give me an email adress I can send the attachment to :-)

Best regards

Olaf Monien · 5 months ago

Please send via e-mail to olaf (at) monien (dot) net

My mailbox has no size limit.

Regards,
Olaf

Name · 5 months ago

Mail on its way.
Hope it will solve the problem for all you guys.

Best regards
LordByte

Olaf Monien · 5 months ago

Great - thanks! I have posted a link to the patcher under "Update 2" above.

Name · 5 months ago

Will even update it for other versions of Delphi,
if anyone so desire. You must provide the
native BORDBGxxxN.dll for inspection, and the
BDS-basekey in the HKEY_CURRENT_USER registry-hive.

Anyway, I hope it works for all of you.

Best regards
Lordbyte

Ron Sharp · 1 month ago

Thanks! That did the trick with Delphi 2009 and Windows 7 for me (after I remembered to run it as an admin). There still seems to be a delay between closing the app and control returning to the IDE, but that's preferable to having to restart Delphi.

It would be nice if there was an official patch for this, short of Delphi 2010, since it wasn't that long ago that I upgraded to 2009.

claudio68 · 5 months ago

Hi Olaf's

GREAT! GREAT! GREAT!!!

Thank you very muche for this solution!!

best Regards

zvyagaaa · 4 months ago

Thanks a lot for your solution :) With Love From Siberia

John · 4 months ago

Sweet dude, the automatic patch tool works like a charm, I can finally debug again!

Carl Clark · 4 months ago

Hoo Haa!
Thanks a million Olaf and LordByte (Patcher worked on my Delphi 2007).

Mason Wheeler · 3 months ago

Not sure how much this affects older versions of Windows. I've been running Delphi 2009 under Vista 64 for almost a year now and never seen this problem once, even in multi-threaded apps.

OnasJ · 2 months ago

thx alot for this solution!

CRM455 · 3 weeks ago

Thanks guys,
This saved me a lot of time trying to figure out what is going on.
Patch program worked great on D2007.
:)
Chris

Davit · 3 weeks ago

THANK YOU VERY MUCH

philipljackson · 6 days ago

Thanks guys,
I would never have been able to solve this one myself
Patch program worked great on D2007.

piranha · 5 days ago

Thanks dude!