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84400 discussions

Re: wine_anon_mmap MAP_FIXED patch
by Ulrich Weigand 15 Nov '01

15 Nov '01

Bang Jun-Young <junyoung(a)mogua.com> wrote: > Why this is necessary is because most Win32 binaries expect itself > to be loaded at fixed address (0x400000). GCC and M$ compilers seem > to strip relocation info on .exe by default, so we need to ensure > that on some OS, i.e. NetBSD. Refer to NetBSD/FreeBSD mmap(2) manpage > on MAP_FIXED flag. On Linux, it shouldn't do any harm. On Linux and Solaris, MAP_FIXED has a different meaning: it will *replace* any pre-existing mapping at the given address, typically causing corruption. I'm not sure what the BSD behaviour is; are you sure they handle MAP_FIXED differently? On Linux, this is not a problem because *without* MAP_FIXED, it will always use the specified address unless there is a conflict with existing mappings. On Solaris, we've implemented a hack that emulates the Linux behaviour in this respect (look at the routine solaris_try_mmap, which is called from wine_anon_mmap). I guess the proper fix would be to implement a similiar BSD specific workaround inside wine_anon_mmap. The Solaris version will probably not work unchanged on BSD, however. If you are correct in your interpretation of the semantics of MAP_FIXED on BSD, a workaround could look like this: first, try mapping with MAP_FIXED; if this fails, repeat without. Bye, Ulrich -- Dr. Ulrich Weigand weigand(a)informatik.uni-erlangen.de

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Re: patch.py?id=1005690229526658676564693 (fwd)
by Gerard Patel 14 Nov '01

14 Nov '01

At 10:10 PM 13/11/2001 -0500, you wrote: >Good day! > >regapi still works. My little winelib program exits with no error, but >leaves a stale socket and does nothing. juno.exe, progman, >I_view32.exe, and Dmitry's little About.exe leave a stuck wine process >and a stale wineserver socket. I expect there is general consternation, >or else it has been fixed already, but I guess I will have to reverse >the patch to see. > general consternation ? Well, I have about 20 test apps and 2 don't start anymore, the rest working as well as before. That's pretty ordinary ;-) I'm not completely sure if the patch is the culprit (I use Cvs and I get several patches at the same time). I don't have the time to investigate further right now. More later. Gerard

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patch.py?id=1005690229526658676564693 (fwd)
by lawson_whitney＠juno.com 14 Nov '01

14 Nov '01

Good day! regapi still works. My little winelib program exits with no error, but leaves a stale socket and does nothing. juno.exe, progman, I_view32.exe, and Dmitry's little About.exe leave a stuck wine process and a stale wineserver socket. I expect there is general consternation, or else it has been fixed already, but I guess I will have to reverse the patch to see. Regards, Lawson ---oof--- ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.

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Re: [RFC]: Overlapped I/O implementation
by Mike McCormack 14 Nov '01

14 Nov '01

Hi Martin, >However, I assume you have had good reasons to abaondon the old >server-centric implementation, so I'm reluctant to go that way. Not really. The main reason i did it was because the server is slow and clunky and i thought i'd be able to squeeze a bit of extra performance out of the code by putting it in the client. The best starting point for solving the problems you describe is to revert my patch that put async I/O in the client. i'll even do it if you like... Now who said that premature optimization is the root of all evil? :-) Mike ------------------------------------------ mailto:Mike_McCormack@start.com.au ph +82 16 430 0425 __________________________________________________________________ Get your free Australian email account at http://www.Looksmart.com.au

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Yet another async I/O issue: block devices
by Martin Wilck 14 Nov '01

14 Nov '01

Hi, I just discovered yet another problem that arises for overlapped I/O on normal disk files, more correctly, for any file on a block device. Obviously IO requests on block devices on Linux are _always blocking_. I wrote a very simple test program for reading from a floppy disk and found exactly this behaviour, no matter if O_NONBLOCK was set or not. "man 2 open" also says that O_NONBLOCK may or may not have any effect on non-socket fd's and for block devices it clearly has none. I don't know the reason for this, but it may have to do with Linux' caching algorithms. This means that - with ReadFile() etc. on regular files, the asynch code will never be executed. Instead, the call will block when trying to read immediately, and then return success. - I am not 100% sure in what context the asynchronous handlers are executed, but the read() write() calls there will be blocking as well. I assume this is not what we want. - I guess that for programs that "know" some IO is going to take a lot of time (read()s on floppies, network file systems, ...) will potentially be broken if they try to do overlapped IO and "do something else" while the IO is executing. I do see the need, therefore, to have an approach that mimics Windows' behaviour here. - The only simple approach that I can see for making this happen is creating a separate thread for reading/writing asynchronous IO. The simplest approach would actually be to do a clone() for each async request with CLONE_FILES | CLONE_VM | CLONE_PARENT. I don't know how this would fit into Wine's general synchronization approach - please give me hints. - The separate thread itself would be very simple for files on block devices, because it can simply execute the blocking read and finish when the read finishes, leaving some status information somewhere. - For other devices that _do_ support O_NONBLOCK, it may be cool to mimic this simple behaviour by clone()ing too, dup() ing the fd, resetting the O_NONBLOCK flag, and doing a blocking IO request just the same. That means to basically leave it up to the kernel to handle synchronization. This would also mean that we wouldn't have to worry about differences between files and sockets/pipes, because I'm 99% sure the kernel would do it right. I don't understand the concept of the wine service thread well enough yet to judge if that could be used for doing what I just suggested. Perhaps someone can help me out with that, I'll be studying the sources in the meantime. Cheers, Martin PS. I guess another possible approach would be using raw I/O, but I am very certain this is not what we want. -- Martin Wilck Phone: +49 5251 8 15113 Fujitsu Siemens Computers Fax: +49 5251 8 20409 Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com D-33106 Paderborn http://www.fujitsu-siemens.com/primergy

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Local USER classes act as global
by Joshua Thielen 14 Nov '01

14 Nov '01

Hello, When I checked out the latest CVS, all the dialog boxes in Finale stopped working (again) . This happened since Alexandre fixed a function call from GetModuleHandleA("USER") to GetModuleHandle16("USER") in my previous GetClassInfo16 patch (thanks Alexnadre!). My patch had worked because GetModuleHandleA returned hInstance 0 for USER and Finale would proceed to register a window class with hInstance 0. Since classes with hInst=0 are treated sort of like global classes in wine, the window class was found. After more investigating, I discovered that in Win16, any window class that is registered with a USER instance handle will be found even if the hInstance passed to the function (GetClassInfo, CreateWindow etv c.) is completely different. This happens even for classes without the CS_GLOBALCLASS style. I have some small test apps if anyone is intrigued by this. Anyway, this patch implements this undocumented bug, uh.. er.. feature in wine and gets Finale working again . Changelog: Local classes registered with USER instance handle now are now found in CLASS_FindClassByAtom. Modified Files: wine/windows/wnd16.c Josh Thielen Index: wine/windows/class.c =================================================================== RCS file: /home/wine/wine/windows/class.c,v retrieving revision 1.42 diff -u -r1.42 class.c --- wine/windows/class.c 2001/11/06 20:57:27 1.42 +++ wine/windows/class.c 2001/11/13 23:23:39 @@ -279,10 +279,14 @@ * NOTES * 980805 a local class will be found now if registred with hInst=0 * and looed up with a hInst!=0. msmoney does it (jsch) + * + * Local class registered with a USER instance handle are found as if + * they were global classes. */ static CLASS *CLASS_FindClassByAtom( ATOM atom, HINSTANCE hinstance ) { - CLASS * class, *tclass=0; + CLASS * class, *tclass = 0, *user_class = 0; + HINSTANCE hUser = GetModuleHandle16("USER"); TRACE("0x%08x 0x%08x\n", atom, hinstance); @@ -293,16 +297,20 @@ if (class->style & CS_GLOBALCLASS) continue; if (class->atomName == atom) { - if (hinstance==class->hInstance || hinstance==0xffff ) + if (hinstance==class->hInstance || hinstance==0xffff) { TRACE("-- found local %p\n", class); return class; } - if (class->hInstance==0) tclass = class; + if (class->hInstance == 0) tclass = class; + else if(class->hInstance == hUser) + { + user_class = class; + } } } - /* Then search global classes */ + /* Then search global classes */ for (class = firstClass; (class); class = class->next) { @@ -312,6 +320,13 @@ TRACE("-- found global %p\n", class); return class; } + } + + /* Check if there was a local class registered with USER */ + if( user_class ) + { + TRACE("--found local USER class %p\n", user_class); + return user_class; } /* Then check if there was a local class with hInst=0*/

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weird linux/solaris problem.
by Roger Fujii 13 Nov '01

13 Nov '01

Well, I finally figured out the major problem I've been having with wine and virtualdub under solaris, but I'm not sure what to do about it. In memory/virtual.c, there are 2 problems: 1) in function anon_mmap_aligned, there is a section that tries to release extra memory. The problem is that under solaris, munmap length parameter is defined as: The munmap() function removes the mappings for pages in the range [addr, addr + len), rounding the len argument up to the next multiple of the page size as returned by sysconf(3C). It's not exactly clear what the linux munmap does, but I think that the linux one does what you think it SHOULD do, and the solaris one does what is documented (i.e. will unmap more pages than what the linux one thinks it would since it rounds UP the len). Now, I can see 2 fixes: 1 is to #ifdef __svr4 and compute the compensated len before unmapping. The other is to just not do this release (or at least not do it for __svr4). Any comments? 2) For some reason I don't quite understand, a call is made to VirtualProtect with a READONLY protection, and soon after, something tries to memcpy into that block. I'm not sure if this is a thread sync issue, or maybe this is supposed to work like c's const (ie, it's readonly AFTER the first write). Kind of puzzling, since it does work under linux. Any suggestions? (my current fix is to treat READONLY as RW, which works, but I know is wrong). Thanks. -r Roger Fujii <rmf(a)lookhere.com> Underemployed, and trying to keep it that way....

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Re: [RFC]: Overlapped I/O implementation
by Martin Wilck 13 Nov '01

13 Nov '01

Hi Mike, all, I have thought some more. Having understood the problem with the possibly duplicate process fds, it is clear that in order to treat multiple simultaneous requests correctly, there must be some server-side support on a per-IO-object basis. With the current implementation as a guideline, I see only one possibility to do this: The server maintains two semaphores for async reading and writing for each I/O object (file, socket, comm port...) that has the OVERLAPPED flag set. The semaphores have a max count of 1 for FIFOS and some larger number for random-access files (this will be set by object-type-dependent functions). The async_private struct has a Semaphore field. When the client schedules an async request, it gets the suitable semaphore handler (read/write) of the I/O object from the server and stores it in the async_private struct. The async_handler function does not start actual I/O before acquiring the semaphore, and releases it when finished. The handler is in IO_PENDING state until it gets the semaphore and remains in that state after obtining access until it releases the semaphore. This provides a rather elegant framework for limiting the number of concurrent readers and writers. I am not sure, though, if the async_handler functions are allowed to wait for semaphores ??? Perhaps we'd need to use Unix semaphores ? Any other approach I've thought of so far seems to imply a lot of client-server interaction and mangling in the NtCurrentTeb()->pending_list. Please notify me if you have better ideas. The other possible solution would be to go back to the server-centric implementation of 8 months ago, or something similar. Most likely the NtCureentTeb()->pending_list would have to be dropped in that case, and server-side communications used instead. However, I assume you have had good reasons to abaondon the old server-centric implementation, so I'm reluctant to go that way. There is another concern, though. You wrote: > When the thread waits upon any server object, all (unix) fds with > pending overlapped operations are polled on. This is a minor problem > in the design; if the thread never waits upon an object the overlapped > can never complete, however the thread must wait upon the overlapped's > hEvent to check whether it has completed... AFAICS, there will not even be an I/O request unless the client waits on something (at least in ReadFileEx()). I wonder if this can cause the advantages of async IO to be lost if a a long time elapses before the client waits on anything. Definitely, if the first wait the client issues is on the async request itself, the handler will have done nothing in the meantime and there is no real asynchronicity any more. Meanwhile all arriving data must be buffered by the kernel. This is probably no problem on a serial port, but what if you're dealing with a fully loaded ethernet connection or a local socket with a lot of traffic? Anyway, That's probably a minor issue. Please tell me if you think the semaphore idea is feasible. Martin -- Martin Wilck Phone: +49 5251 8 15113 Fujitsu Siemens Computers Fax: +49 5251 8 20409 Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com D-33106 Paderborn http://www.fujitsu-siemens.com/primergy

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Pajama Sam audio problems mysteriously gone; Film at eleven
by Ori Pessach 13 Nov '01

13 Nov '01

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, In my attempts to figure out which change caused some games not to detect the sound card on my machine, I started checking out historic versions from CVS, building them, and testing whether they work or not. They all worked. All in all, I tested versions from 10/07/2001, the last version I knew worked, to the current CVS version, in a binary search pattern. The games still exhibit the problems I reported earlier - the sound is breaking up, and the colorful cursors don't show up, but at least I have something to debug now. If anybody has any ideas about the sound (waveOut*) that weren't discussed yet, I'd love to hear about them. I'd like to thank everyone for their time, especially Eric, who waded through megabytes of relay messages on what turned out to be a wild goose chase. Ori Pessach -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: http://www.oripessach.com iD8DBQE78JUUzA/uWWyw6uQRAutEAKCs/nb8dqkcoqOxKfonO8B5d5HyUgCgwImR rwT2dIFiZ5Yo7MzODLio2hw= =9RtW -----END PGP SIGNATURE----- _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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Re: Regression errors
by Gerard Patel 13 Nov '01

13 Nov '01

At 11:06 AM 10/11/2001 -0500, you wrote: > >Thanks Gerard. I will try it Tuesday. Going out of town till then. Well, I have advanced a bit this weekend. I noticed that one of my test app does indeed show this regression after the patch we are talking about. As the case is a lot more simple than the one I was trying to debug before for this problem, I have been able to understand better what is happening. The problem shows itself in the following case : - invalidating a window - hiding it - deleting it and after that the paint count is > 0. I can make the paint count change correctly with the following change : --- winpos.c.orig Thu Nov 8 01:57:34 2001 +++ winpos.c Mon Nov 12 09:47:08 2001 @@ -883,10 +883,10 @@ if (!(winpos->flags & SWP_SHOWWINDOW) && (winpos->flags & SWP_HIDEWINDOW)) { - WIN_SetStyle( winpos->hwnd, wndPtr->dwStyle & ~WS_VISIBLE ); /* clear the update region */ -// RedrawWindow( winpos->hwnd, NULL, 0, RDW_VALIDATE | RDW_NOFRAME | -// RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ALLCHILDREN ); + RedrawWindow( winpos->hwnd, NULL, 0, RDW_VALIDATE | RDW_NOFRAME | + RDW_NOERASE | RDW_NOINTERNALPAINT | RDW_ALLCHILDREN ); + WIN_SetStyle( winpos->hwnd, wndPtr->dwStyle & ~WS_VISIBLE ); } else if ((wndPtr->dwStyle & WS_VISIBLE) && !IsRectEmpty( &oldWindowRect ) && IsRectEmpty( &newWindowRect )) Now, I don't know why this RedrawWindow call was commented out :-/ Gerard

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