[K42-discussion] crash in FileSystemGlobal::FSFileGlobal::rename

[Dilma DaSilva]

I'll be looking at this one.

dilma

Andrew Baumann writes:
 > Hi there,
 > 
 > I'm working on running AIM7 on K42, and I've noticed a few things breaking :)
 > 
 > Here's a fairly complete backtrace for a crash in baseServers when a process 
 > removes and then tries to move a nonexistent file. I'm not sure why the 
 > configure script is doing that, but hopefully the backtrace below is complete 
 > enough for someone more familiar with the FS code to spot the bug (rename 
 > being called with renamedFinfo = NULL). There are certainly a lot of FIXMEs 
 > about nonexistent files around that code (DirLinuxFS::rename).
 > 
 > Andrew
 > 
 > Mapping program /bin/sh, pid 0x15a4, vp 0 to pp 0.
 > Re-Mapping program /usr/bin/rm (rm -f ./confstatKSUKXh ), k42 pid 0x15a4 linux 
 > pid 0x16cc.
 > Mapping program /bin/sh, pid 0x15a5, vp 0 to pp 0.
 > Re-Mapping program /usr/bin/mv (mv ./confstatKSUKXh lib/Makefile ), k42 pid 
 > 0x15a5 linux pid 0x16cd.
 > /home/andrewb/work/k42.local/k42.head/kitchsrc/os/kernel/proc/ProcessReplicated.C,564: 
 > Invalid memory access: processID 0x1 addr 0x0, type 40000000
 > WARNING: file 
 > "/home/andrewb/work/k42.local/k42.head/kitchsrc/os/kernel/exception/ExceptionLocal.C", 
 > line 352
 > User-mode bad-address fault: commID 0x100000000, pc 0x10038d50, addr 0, rc 
 > 8000000005cd6416.
 > GDB got trap: Data Storage Interrupt
 > vector=0x300, sr=0x900000000000f032, pc=0x10038d50 lr=0x10038d40
 > 
 > 
 > #0  0x0000000010038d50 in FileSystemGlobal::FSFileGlobal::rename(char*, 
 > unsigned long, FSFile*, char*, unsigned long, FSFile*) (this=0x10000676b480,
 >     oldName=0x1000000eddef "out", oldLen=0x3, newDirInfo=0x10000676b140,
 >     newName=0x1000000ede0c "Makefile", newLen=0x8, renamedFinfo=0x0)
 >     at FileSystemGlobal.H:335
 > #1  0x0000000010128908 in DirLinuxFS::rename(char*, unsigned long, 
 > DirLinuxFS**, char*, unsigned long) (this=0x100026bae200, 
 > oldname=0x1000000eddef "out",
 >     oldnamelen=0x3, newDirRef=0x10010005010,
 >     newname=0x1000000ede0c "Makefile", newnamelen=0x8)
 >     
 > at /home/andrewb/work/k42.local/k42.head/kitchsrc/lib/libc/fslib/DirLinuxFS.C:1489
 > #2  0x000000001012fcd4 in DirLinuxFSVolatile::rename(char*, unsigned long, 
 > DirLinuxFS**, char*, unsigned long) (this=0x100026bae200,
 >     oldname=0x1000000eddef "out", oldnamelen=0x3, newDirRef=0x10010005010,
 >     newname=0x1000000ede0c "Makefile", newlen=0x8)
 >     
 > at /home/andrewb/work/k42.local/k42.head/kitchsrc/lib/libc/fslib/DirLinuxFSVolatile.C:753
 > #3  0x0000000010133c30 in NameTreeLinuxFS::_rename(char*, unsigned long, 
 > char*, unsigned long, unsigned long) (this=0x100006648c40,
 >     name=0x1000000eddd0 "\005reaim\bre-aim-7\016confstatKSUKXh\003out",
 >     namelen=0x22,
 >     newName=0x1000000eddf8 "\005reaim\bre-aim-7\003lib\bMakefile",
 >     newLen=0x1c, pid=0x15a5)
 >     
 > at /home/andrewb/work/k42.local/k42.head/kitchsrc/lib/libc/fslib/NameTreeLinuxFS.C:899
 > #4  0x00000000101b8384 in XNameTreeLinux::__renameEPcmS0_m(unsigned long) (
 >     this=0x100006806ec0, callerID=0x15a500000000) at XNameTreeLinux.C:757
 > #5  0x00000000101d806c in DispatcherDefault_InvokeXObjMethod ()
 >     at MetaCOListServer.H:11
 > #6  0x00000000101d7f04 in DispatcherDefault_PPCServerOnThread ()
 >     at MetaCOListServer.H:11
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