[Aquamacs-devel] lock files cause Aquamacs to hang

[David Reitter]

Hey Pete,
it sounds to me like there's a problem with the file system (since the  
rm command doesn't work), and the hang just follows from that.
Of course, unlink() might not be guaranteed to work properly.  I don't  
see any loops in lock_file() (filelock.c), but I wouldn't be surprised  
if something's waiting for the file to go away (and unlink()ing  
repeatedly).

- David

On Oct 25, 2009, at 1:47 PM, Pete Siemsen wrote:

> David,
>
> With gdb on "2.0preview2", here's the backtrace:
>
> (gdb) bt
> #0  0x94d5da76 in unlink ()
> #1  0x000f864f in current_lock_owner ()
> #2  0x000f86e7 in lock_if_free ()
> #3  0x000f8926 in lock_file ()
> #4  0x000fe2ad in prepare_to_modify_buffer ()
> #5  0x000fd6be in del_range_1 ()
> #6  0x000fd625 in del_range ()
> #7  0x00116dfa in Fdelete_char ()
> #8  0x00169c15 in Ffuncall ()
> #9  0x00164532 in Fcall_interactively ()
> #10 0x00169c48 in Ffuncall ()
> #11 0x00169704 in call3 ()
> #12 0x000daa38 in Fcommand_execute ()
> #13 0x000c9e31 in command_loop_1 ()
> #14 0x00167030 in internal_condition_case ()
> #15 0x000c7ca2 in command_loop_2 ()
> #16 0x001669c1 in internal_catch ()
> #17 0x000c7c2b in command_loop ()
> #18 0x000c71ff in recursive_edit_1 ()
> #19 0x000c7408 in Frecursive_edit ()
> #20 0x000c5710 in main ()
> (gdb)
>
>
> Yes, it also occurs with 1.9.  Using 1.9, here's the top part of a  
> dump after a Force Quit:
>
> Date/Time:      2009-10-21 08:49:09 -0600
> OS Version:     10.5.8 (Build 9L30)
> Architecture:   i386
> Report Version: 4
>
> Command:        Aquamacs
> Path:           /Applications/Aquamacs Emacs.app/Contents/MacOS/ 
> Aquamacs Emacs
> Version:        Aquamacs 1.9, GNU Emacs 22 (1.9)
> Parent:         launchd [125]
>
> PID:            4883
> Event:          hang
> Time:           8.02s
> Steps:          48
>
>
> Process:        Aquamacs Emacs [4883]
> Path:           /Applications/Aquamacs Emacs.app/Contents/MacOS/ 
> Aquamacs Emacs
>
>  ADDRESS         BINARY
>  00001000        /Applications/Aquamacs Emacs.app/Contents/MacOS/ 
> Aquamacs Emacs
>  01781000        /System/Library/PrivateFrameworks/ 
> URLMount.framework/URLMount
>  020eb000        /System/Library/CoreServices/RawCamera.bundle/ 
> Contents/MacOS/RawCamera
>  02464000        /System/Library/Filesystems/URLMount/smb.URLMounter/ 
> Contents/MacOS/smb
>
>  Thread id:      8f16998
>  User stack:
>    48 _prepare_to_modify_buffer + 383 (in Aquamacs Emacs) [0xc525a]
>      27 ___unlink + 10 (in libSystem.B.dylib) [0x94d5da76]
>      11 ___symlink + 10 (in libSystem.B.dylib) [0x94d9879e]
>      10 ___readlink + 10 (in libSystem.B.dylib) [0x94d55a0e]
>  Kernel stack:
>    48 _unix_syscall + 572 [0x3e3a7f]
>      27 _unlink + 113 [0x1e55b1]
>        27 _undelete + 665 [0x1e5403]
>          16 _VNOP_REMOVE + 119 [0x1f5c53]
>            16 com.apple.filesystems.smbfs (1.4.6) + 69064 [0x5b3bcdc8]
>              16 com.apple.filesystems.smbfs (1.4.6) + 68698  
> [0x5b3bcc5a]
>                15 com.apple.filesystems.smbfs (1.4.6) + 34555  
> [0x5b3b46fb]
>                  15 com.apple.filesystems.smbfs (1.4.6) + 125137  
> [0x5b3ca8d1]
>                    15 com.apple.filesystems.smbfs (1.4.6) + 124651  
> [0x5b3ca6eb]
>                      15 com.apple.filesystems.smbfs (1.4.6) + 122984  
> [0x5b3ca068]
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