RE: ORBit install
Thanks for the hints Rob. I'll have a look at this again as soon as I get the chance. It will be some time before I will have a chance to build a debug cygwin1.dll though. Steven -Original Message- From: Robert Collins [mailto:[EMAIL PROTECTED]] Sent: 21 February 2002 12:25 To: O'BRIEN,STEVE (HP-UnitedKingdom,ex1); [EMAIL PROTECTED] Subject: RE: ORBit install -Original Message- From: O'BRIEN,STEVE (HP-UnitedKingdom,ex1) Hi Rob I didn't mean to suggest that there is a problem with the cygwin pthread implementation. There may be :}. I'm not concerned if there is or is not, but rather with the fault you see - when we examine that we can lay blame :}. Sometimes I get: GThread-ERROR **: file gthread-posix.c: line 55 (g_mutex_new_posix_impl): error Device or resource busy during pthread_mutex_init ((pthread_mutex_t *) result, ((void *)0)) What does gthread-posix.c line 55 look like. Sometimes I get a segmentation fault Can you duplicate this with gdb, or with strace, or with JIT debugging (see how-debuging-works.txt in the cygwin source directory.You'll need a debug cygwin1.dll for tracking this down. Sometimes the test completes ok Failures appear at different points in the program, so I can't even say that the resource busy always occurs at X and segmentation fault always occurs at Y. Thats ok. If we can pin one down with a good backtrace, it may make the fault visible. When running in gdb the debug symbol table becomes corrupted, so the function names it reports do not match the file:lineno reported - so the program is clearly trashing memory on its way. Optimisation can also cause that, I wouldn't assume that the symbol table is necessarily corrupt. What does bt full, and info threads show? I *think* that a mutex is not being set properly, or is being corrupted when the memory managment error kicks in, so that two threads attempt to free the same memory, or one uses memory that is already freed by another. All guesswork though, because I have not been able to trace the execution in gdb. Yah, single stepping with threads is iffy at best, they tend not do show the fault. Breakpoints are your friend :}. ROb
RE: ORBit install
Glen Rice wrote: I am trying to install ORBit and I read the directions I found in the ported software section on the CYGWIN website. It said to install ORBit run make with skipping the test directory. How do I do this? Thank you, Glenn Rice I have been working on a port of Gnome to cygwin for some time now. The site you got these instructions from (I guess http://www.geocities.co.jp/SiliconValley/1596/en/cygwin.html) does not say whether any of the packages pass their own test suites. In the case of ORBit this is a serious issue because the idl compiler generated by compiling unpatched sources is badly broken on cygwin, and so the tests do not even build correctly. The problem is that memory alignment of multiword datatypes on Windows does not fit the pattern expected by the ORBit source code. So, for example, any IDL interface containing a double will be incorrectly compiled. I have patches for ORBit and most of the other Gnome libraries that produce DLLs rather than static libraries, and pass their test suites. Unfortunately, this does not guarantee that they are correct. I have just one library left to get working, then I will be able to build a reasonable selection of apps and use them to find any remaining bugs (and I am sure there will be many). The problem library in gnome-vfs, where there appears to be problems with thread mutexes, although I really have not been able to debug this at all. Still, the control-center and gnome-core build OK so I can get a Gnome desktop up, even if I am getting lots of errors generated. Most of gnome-games builds and runs OK too, so there's some reward for my efforts at least! I would like to make my work available to the cygwin community at large, hopefully so that someone who understands cygwin thread management better can get a handle on the faults with gnome-vfs. As this is just a hobby and I get no more than a few hours a month to work on it, I would be happy to hand over to anyone who is interested to take on proper maintenance of these packages and can make them available on the web. Please reply to this mailing list, *not* to me personally. Steven O'Brien
RE: ORBit install
-Original Message- From: O'BRIEN,STEVE (HP-UnitedKingdom,ex1) The problem library in gnome-vfs, where there appears to be problems with thread mutexes, although I really have not been able to debug this at all. Hi, I'm the cygwin pthread maintainer. What seems to be the problem? Rob
